Significant Severe Weather Event Expected Wednesday

A summary of everything is available in a slideshow created by Andrew of the Team

https://onedrive.live.com/embed?cid=434931F6880ADF4C&resid=434931F6880ADF4C%2118078&authkey=ALbDZLTMO3MUzOs&em=2&wdAr=1.7777777777777777

It’s no secret that there has been grave concern regarding severe weather Wednesday. Ingredients and parameters are coming together for this to be a potentially dangerous weather day. We could see some dangerous thunderstorms that could produce significant wind gusts, large hail, and a few tornadoes.

NWS HUN CWA DAY 2 OUTLOOK
SPC DAY 2 OUTLOOK
NWS BMX CWA DAY 2 OUTLOOK

SUMMARY/TIMING: For today, March 16th 2021, a few strong to severe thunderstorms will be possible for central Alabama south of Cullman, Gadsden and Anniston. Looking at a Marginal Risk (Level 1/5) for these areas. Brief damaging wind gusts and a brief tornado are possible in this areas.

On Wednesday, thunderstorms will increase in coverage statewide late in the morning. The morning commute overall looks to be in good shape. There will be breaks in between the morning storms, which will cause instability to rise and put ingredients in place for severe thunderstorms. Expecting to see an increase in overall coverage and intensity during these late morning/afternoon thunderstorms.

Summary of expected hazards:

  • Damaging winds of 60-80 MPH
  • Tornadoes, some of which could be strong and long-tracked
  • Large hail, up to golf ball size
  • Flooding, especially in low-lying areas and areas that see repeated rainfall

TECHNICAL DISCUSSION/IMAGES

This is what the radar will look like from now until 1:00 PM Thursday

Simulated radar now through 1:00 PM Thursday

This is supercell composite radar, which is where supercell development is most likely given the parameters (Parameters being CAPE, high dew points, shear etc.)

Supercell composite radar Wednesday morning through 1:00 PM Thursday

This is the STP (Significant Tornado Parameters) index, indicating where tornado development is likely given the parameters in place. Also the Enhanced Helicity Index is showing where tornadoes could form and “tap in” to be long-tracked.

Significant Severe Weather Event Likely Wednesday

SUMMARY:

There is a threat for some strong thunderstorms on Tuesday, with a greater threat on Wednesday. On Tuesday, the threat will be mainly south of Cullman, and only a Marginal Threat (Level 1/5) for a severe thunderstorms. Gusty winds of 40-50 MPH and heavy rainfall will be the primary threat during this time.

On Wednesday, a more widespread and more intense chance for severe thunderstorms exists as a warm front moves north. Conditions will be favorable for large hail, damaging straight-line winds (70+ MPH), and tornadoes – one or two which could be strong.

CONCLUSION

  • Round 1/2- Marginal Risk for severe storms mainly south of Cullman to Alexander City. Primary threats: small hail, gusty winds, heavy rain
  • Round 2/2- Enhanced Risk for severe storms Coverage area-wide. All modes of severe weather possible, including damaging straight-line winds of 60-70 MPH, large hail, and tornadoes – one or two which could be strong. Timing: Beginning Wednesday afternoon lasting through the evening
  • Flash flooding threat: minimal due to

DISCUSSION

…SUMMARY…
    A broad area of severe weather potential -- including risk for large
    hail, damaging winds, and several tornadoes -- is anticipated
    Wednesday from  the Arkansas/Louisiana vicinity eastward across the
    central Gulf Coast states/southern Appalachians.
 …Synopsis…
    A vigorous upper low moving across central portions of the U.S. will
    once again be the primary upper feature of interest, as it tracks
    from the Texas/Oklahoma Panhandle vicinity early, to southern
    Missouri through the end of the period.  Ahead of this system,
    moderately strong/accompanying flow will spread across the lower
    Mississippi and Tennessee Valleys and central Gulf Coast states with
    time.
 At the surface, a low is forecast to cross Oklahoma during the day,
    and then should cross the Ozarks through the evening eventually
    reaching the western Illinois vicinity by 18/12Z.  Widespread
    thunderstorms, and substantial/accompanying severe risk, can be
    expected in advance of this system.
 …The AR/LA vicinity eastward to portions of TN/GA and the FL
    Panhandle…
    Showers and thunderstorms are forecast to be ongoing from Kansas
    southward to Texas ahead of the advancing upper system and
    associated cold front, and eastward across the central Gulf Coast
    states in a zone along a west-to-east warm front.  Some ongoing
    severe risk will likely exist at the start of the period.
 With time, as moisture streams northward from the Gulf of Mexico
    beneath steepening lapse rates, modest heating will push
    surface-based CAPE into the 1000 to 2000 J/kg range with a broad
    warm sector stretching from the AR/LA vicinity eastward to the
    southern Appalachians.  Convection is forecast to increase in
    response to the destabilization, as persistent UVV occurs not only
    in the vicinity of the cold and warm fronts, but also more broadly
    within the general warm-advection regime.
 Southerly low-level flow, veering and increasing to around 50 kt
    from the west/southwest at mid levels will provide shear favorable
    for supercells.  Additionally, ample low-level shear is expected to
    evolve through the day -- particularly near the aforementioned warm
    front which should drift northward across Arkansas and align
    west-northwest to east-southeast from far southern MO to central GA
    by early evening.  As such, tornado risk may be maximized near this
    boundary -- across the AR area during the day, and then later
    increasing eastward across AL and perhaps into GA as well, as
    low-level flow increases into the evening/overnight.  
 In addition to tornado potential -- including the risk for a couple
    of significant tornadoes across a broad area represented by the
    ENH/30% risk area, large hail and damaging winds will also occur in
    some areas.  Risk will continue through the overnight hours,
    tapering from west to east across the lower Mississippi Valley but
    continuing across the central Gulf Coast states and into the
    southern Appalachians through 18/12z.

Winter Storm Watch Posted For North/Northwest Alabama Wed Afternoon

edited to include graphics from NWS HUN

More additional wintry weather is likely beginning Wednesday afternoon through Thursday morning. Temperatures are more likely to be freezing for areas west of Interstate 65 during this time – those who have unfortunately had the worst of the previous ice storm.

For areas not included in the Watch, a “cold rain” is briefly expected but not for an extended amount of time and no significant impacts are expected at this time. Continue to check back for the latest updates

[spoiler title=”Winter Storm Watch From NWS HUN”]

URGENT - WINTER WEATHER MESSAGE
National Weather Service Huntsville AL
903 PM CST Tue Feb 16 2021

ALZ001>005-171300-
/O.NEW.KHUN.WS.A.0002.210217T2200Z-210218T1200Z/
Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-
Including the cities of Florence, Muscle Shoals, Sheffield,
Tuscumbia, Russellville, Red Bay, Moulton, Town Creek, and Athens
903 PM CST Tue Feb 16 2021

...WINTER STORM WATCH IN EFFECT FROM LATE WEDNESDAY AFTERNOON
THROUGH LATE WEDNESDAY NIGHT...

* WHAT...Heavy mixed precipitation possible. Total snow and sleet
  accumulations of up to two inches and ice accumulations of one
  to two tenths of an inch possible.

* WHERE...Lauderdale, Colbert, Franklin AL, Lawrence and
  Limestone counties.

* WHEN...From Wednesday afternoon through late Wednesday night.

* IMPACTS...Plan on slippery road conditions. The hazardous
  conditions could impact the evening commute.

* ADDITIONAL DETAILS...Dangerous travel conditions will redevelop
  quickly due to very cold ground and surface temperatures.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch means there is a potential for significant
snow, sleet, or ice accumulations that may impact travel. Continue
to monitor the latest forecasts.

&&

$$

TNZ076-096-097-171300-
/O.NEW.KHUN.WS.A.0002.210218T0000Z-210218T1200Z/
Moore-Lincoln-Franklin TN-
Including the cities of Lynchburg, Fayetteville, Winchester,
Sewanee, Decherd, Estill Springs, and Cowan
903 PM CST Tue Feb 16 2021

...WINTER STORM WATCH IN EFFECT FROM WEDNESDAY EVENING THROUGH
LATE WEDNESDAY NIGHT...

* WHAT...Heavy mixed precipitation possible. Total snow and sleet
  accumulations of up to two inches and ice accumulations of
  around one tenth of an inch possible.

* WHERE...Moore, Lincoln and Franklin TN counties.

* WHEN...From Wednesday evening through late Wednesday night.

* IMPACTS...Plan on slippery road conditions.

* ADDITIONAL DETAILS...Dangerous travel conditions will redevelop
  quickly due to very cold ground and surface temperatures.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Watch means there is a potential for significant
snow, sleet, or ice accumulations that may impact travel. Continue
to monitor the latest forecasts.[/spoiler]

11:00 AM Winter Weather Update

Many in north and central Alabama are waking up to dry snowflakes. This snow is accumulating onto surfaces, vehicles, and likely bridges and overpasses. Slight amounts of sunshine are aiding in the drying of water on roadways, making travel slightly less dangerous – but caution is still advised – especially on bridges and overpasses. Little to no more accumulations are anticipated across north Alabama, but a Special Weather Statement is in place:

[spoiler title=”Special Weather Statement from NWS HUN”]

Special Weather Statement
National Weather Service Huntsville AL
621 AM CST Tue Feb 16 2021

ALZ001>010-016-TNZ076-096-097-162100-
Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan-
Marshall-Jackson-DeKalb-Cullman-Moore-Lincoln-Franklin TN-
621 AM CST Tue Feb 16 2021

...Scattered Light Snow Showers across North Alabama and Southern
Middle Tennessee Will Continue Through Late Morning...

...Icy Roadways Will Persist Through Much of the Day Across
All of North Alabama and Southern Middle Tennessee...

Light snow showers will continue to move across portions of north
Alabama and southern Middle Tennessee through the late morning hours.
In some cases, these light snow showers may leave light accumulations
of around one half inch to inch. These kind of snowfall accumulations
will be very localized and most areas will not see much in the way
of additional impacts from the light snow flurries that are falling,
as roads everywhere are already very treacherous.

Black ice has developed across much of the road network across the
area, due to ice, sleet, and light snow accumulations. This black
ice will remain in place on area roadways throughout the day as
temperatures will remain below the freezing mark.

It will likely be exceedingly difficult, if not impossible
to travel, especially during the typical hours of the morning rush
hour commute. Bridges and overpasses, are especially at risk. Do not
assume that a well traveled road will be free of ice. Additionally,
some roads may also be blocked by falling trees or tree limbs.

For a list of affected roadways, consult local media outlets.

Stay tuned to NOAA Weather Radio, or a favorite local media outlet,
for further statements or updates from the National Weather Service
in Huntsville.[/spoiler]

There are currently Winter Weather Advisories for central Alabama that expire at noon, where small additional accumulations are possible.

[spoiler title=”Winter Weather Advisory Expiring At Noon From NWS BMX”]

URGENT - WINTER WEATHER MESSAGE
National Weather Service Birmingham AL
731 AM CST Tue Feb 16 2021

...Light Snow and Cold Temperatures May Result in some Minor Snow
Accumulations...

ALZ011>014-022-030-031-161800-
/O.NEW.KBMX.WW.Y.0005.210216T1331Z-210216T1800Z/
/O.CON.KBMX.WC.Y.0001.000000T0000Z-210216T1500Z/
Marion-Lamar-Fayette-Winston-Pickens-Sumter-Greene-
Including the cities of Hamilton, Sulligent, Vernon, Fayette,
Double Springs, Carrollton, Livingston, and Eutaw
731 AM CST Tue Feb 16 2021

...WINTER WEATHER ADVISORY IN EFFECT UNTIL NOON CST TODAY...
...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST THIS
MORNING...

* WHAT...For the Winter Weather Advisory, snow. Additional snow
  accumulations of up to one half inch. For the Wind Chill
  Advisory, very cold wind chills. Wind chills as low as 5 below
  zero.

* WHERE...Portions of northwest and west central Alabama.

* WHEN...For the Winter Weather Advisory, until noon CST today.
  For the Wind Chill Advisory, until 9 AM CST this morning.

* IMPACTS...Plan on slippery road conditions. The hazardous
  conditions could impact the morning commute. The cold wind
  chills could result in hypothermia if precautions are not
  taken.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

Use caution while traveling outside. Wear appropriate clothing, a
hat, and gloves.

&&

$$

ALZ015-017>021-023>029-032>050-161800-
/O.NEW.KBMX.WW.Y.0005.210216T1331Z-210216T1800Z/
Walker-Blount-Etowah-Calhoun-Cherokee-Cleburne-Tuscaloosa-
Jefferson-Shelby-St. Clair-Talladega-Clay-Randolph-Hale-Perry-
Bibb-Chilton-Coosa-Tallapoosa-Chambers-Marengo-Dallas-Autauga-
Lowndes-Elmore-Montgomery-Macon-Bullock-Lee-Russell-Pike-Barbour-
Including the cities of Jasper, Oneonta, Gadsden, Anniston,
Centre, Heflin, Tuscaloosa, Birmingham, Hoover, Columbiana,
Pelham, Alabaster, Pell City, Moody, Talladega, Sylacauga,
Ashland, Roanoke, Greensboro, Moundville, Marion, Centreville,
Clanton, Rockford, Alexander City, Dadeville, Valley, Lanett,
Lafayette, Demopolis, Linden, Selma, Prattville, Fort Deposit,
Hayneville, Wetumpka, Tallassee, Montgomery, Tuskegee,
Union Springs, Auburn, Opelika, Phenix City, Troy, and Eufaula
731 AM CST Tue Feb 16 2021

...WINTER WEATHER ADVISORY IN EFFECT UNTIL NOON CST TODAY...

* WHAT...Snow. Additional snow accumulations of up to one half inch.

* WHERE...Portions of central, east central, northeast,
  southeast and west central Alabama.

* WHEN...Until noon CST today.

* IMPACTS...Plan on slippery road conditions. The hazardous
  conditions could impact the morning commute.[/spoiler]

North Alabama Upgraded To Ice Storm Warning

Travel is strongly discouraged as ice and heavy snow and ice accumulations are expected across north Alabama and southern-middle Tennessee. A quick summary of everything in effect and the info from local National Weather Service Offices is below.

We will be live-blogging updates, reports and conditions at awpwx.org/live

An Ice Storm Warning is in effect now until 6am Tuesday for Northwest Alabama and north central Alabama for ice accumulations up to 0.50″ and sleet/snow totals up to 1″. A Winter Storm Warning is also in effect Now until 6am Tuesday for Northeast Alabama and Southern Middle Tennessee as ice accumulations could reach up to 0.25″ and sleet/snow totals up to 1″. Power outages due to ice covered trees and power lines are likely, and hazardous travel is expected. If you don’t have to go out, please stay home!
Freezing rain expected tonight through 9 PM tonight with highest impacts west and northwest.

For the Ice Storm Warnings

URGENT - WINTER WEATHER MESSAGE
 National Weather Service Huntsville AL
 402 AM CST Mon Feb 15 2021
 ALZ001>007-016-160015-
 /O.UPG.KHUN.WS.W.0001.000000T0000Z-210216T1200Z/
 /O.NEW.KHUN.IS.W.0001.210215T1002Z-210216T1200Z/
 Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan-
 Cullman-
 Including the cities of Florence, Muscle Shoals, Sheffield,
 Tuscumbia, Russellville, Red Bay, Moulton, Town Creek, Athens,
 Huntsville, Decatur, and Cullman
 402 AM CST Mon Feb 15 2021
 …ICE STORM WARNING IN EFFECT UNTIL 6 AM CST TUESDAY…
 WHAT…Significant icing. Ice accumulations up to one half
 inch. Snow and sleet accumulations of up to one inch.
 WHERE…Lauderdale, Colbert, Franklin AL, Lawrence, Limestone,
 Madison, Morgan and Cullman counties.
 WHEN…Until 6 AM CST Tuesday.
 IMPACTS…Power outages and tree damage are likely due to the
 ice. Travel could be nearly impossible, especially by late this
 morning and through much of the day. These hazardous travels
 conditions will impact the morning and evening commute.
 ADDITIONAL DETAILS…Power outages will be likely due to the
 expected ice accumulations, which in some rural areas could last
 for a few days. The combination of bitter cold temperatures
 tonight into Tuesday will make conditions particularly
 hazardous for those that do lose power. Residents should be
 prepared and have an emergency supply kit ready in event of a
 long duration power outage. Travel conditions will be very slow
 to improve on Tuesday into Wednesday, even after the
 precipitation ends. 
 PRECAUTIONARY/PREPAREDNESS ACTIONS…
 Travel is strongly discouraged. If you must travel, keep an extra
 flashlight, food and water in your vehicle in case of an
 emergency. Prepare for possible power outages.
 The latest road conditions for the state you are calling from can
 be obtained by calling 5 1 1.




URGENT - WINTER WEATHER MESSAGE
 National Weather Service Birmingham AL
 349 AM CST Mon Feb 15 2021
 …Significant freezing rain event today especially over far
 northwest Central Alabama…
 ALZ011>014-022-152215-
 /O.UPG.KBMX.WS.W.0001.000000T0000Z-210216T0600Z/
 /O.NEW.KBMX.IS.W.0001.210215T0949Z-210216T0300Z/
 /O.NEW.KBMX.WC.Y.0001.210216T0600Z-210216T1500Z/
 Marion-Lamar-Fayette-Winston-Pickens-
 Including the cities of Hamilton, Sulligent, Vernon, Fayette,
 Double Springs, and Carrollton
 349 AM CST Mon Feb 15 2021
 …ICE STORM WARNING IN EFFECT UNTIL 9 PM CST THIS EVENING…
 …WIND CHILL ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM
 CST TUESDAY…
 WHAT…For the Ice Storm Warning, significant icing. Storm total
 ice accumulations of quarter to a half inch. Light sleet and
 snow accumulations up to a half inch. For the Wind Chill
 Advisory, very cold wind chills expected. Wind chills as low as
 5 below zero.
 WHERE…Marion, Lamar, Fayette, Winston and Pickens Counties.
 WHEN…For the Ice Storm Warning, until 9 PM CST this evening.
 For the Wind Chill Advisory, from midnight tonight to 9 AM CST
 Tuesday.
 IMPACTS…Power outages and tree damage are likely due to the
 ice. Travel could be nearly impossible. The hazardous conditions
 will impact the morning and evening commute. The cold wind
 chills could result in hypothermia if precautions are not taken. 
 PRECAUTIONARY/PREPAREDNESS ACTIONS…
 Travel is strongly discouraged. If you must travel, keep an extra
 flashlight, food and water in your vehicle in case of an
 emergency. Prepare for possible power outages.
 Use caution while traveling outside. Wear appropriate clothing, a
 hat, and gloves.

For the Winter Storm Warnings

URGENT - WINTER WEATHER MESSAGE
 National Weather Service Birmingham AL
 349 AM CST Mon Feb 15 2021
 …Significant freezing rain event today especially over far
 northwest Central Alabama…
 ALZ032-039-152215-
 /O.EXT.KBMX.WS.W.0001.210215T1200Z-210216T0300Z/
 Hale-Marengo-
 Including the cities of Greensboro, Moundville, Demopolis,
 and Linden
 349 AM CST Mon Feb 15 2021
 …WINTER STORM WARNING NOW IN EFFECT UNTIL 9 PM CST THIS
 EVENING…
 WHAT…Freezing rain expected, possibly mixed with sleet. Total
 ice accumulations up to two tenths of an inch. Temperatures fall
 well below freezing by Monday night with wind chills in the
 single digits.
 WHERE…Hale and Marengo Counties.
 WHEN…Until 9 PM CST this evening.
 IMPACTS…Plan on slippery road conditions. The hazardous
 conditions could impact the morning or evening commute. 
 PRECAUTIONARY/PREPAREDNESS ACTIONS…
 If you must travel, keep an extra flashlight, food, and water in
 your vehicle in case of an emergency.
 &&
 $$
 URGENT - WINTER WEATHER MESSAGE
 National Weather Service Birmingham AL
 349 AM CST Mon Feb 15 2021
 …Significant freezing rain event today especially over far
 northwest Central Alabama…
 ALZ030-031-152215-
 /O.NEW.KBMX.WC.Y.0001.210216T0600Z-210216T1500Z/
 /O.EXT.KBMX.WS.W.0001.000000T0000Z-210216T0300Z/
 Sumter-Greene-
 Including the cities of Livingston and Eutaw
 349 AM CST Mon Feb 15 2021
 …WINTER STORM WARNING NOW IN EFFECT UNTIL 9 PM CST THIS
 EVENING…
 …WIND CHILL ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM
 CST TUESDAY…
 WHAT…For the Winter Storm Warning, significant icing.
 Additional ice accumulations of one tenth to one quarter of an
 inch. For the Wind Chill Advisory, very cold wind chills
 expected. Wind chills as low as zero.
 WHERE…Sumter and Greene Counties.
 WHEN…For the Winter Storm Warning, until 9 PM CST this
 evening. For the Wind Chill Advisory, from midnight tonight to
 9 AM CST Tuesday.
 IMPACTS…Difficult travel conditions are possible. The
 hazardous conditions could impact the morning and evening
 commute. The cold wind chills could result in hypothermia if
 precautions are not taken. 
 PRECAUTIONARY/PREPAREDNESS ACTIONS…
 If you must travel, keep an extra flashlight, food, and water in
 your vehicle in case of an emergency. Prepare for possible power
 outages.
 Use caution while traveling outside. Wear appropriate clothing, a
 hat, and gloves.
 &&
 $$
 URGENT - WINTER WEATHER MESSAGE
 National Weather Service Birmingham AL
 349 AM CST Mon Feb 15 2021
 …Significant freezing rain event today especially over far
 northwest Central Alabama…
 ALZ015-023-152215-
 /O.EXT.KBMX.WS.W.0001.000000T0000Z-210216T0300Z/
 Walker-Tuscaloosa-
 Including the cities of Jasper and Tuscaloosa
 349 AM CST Mon Feb 15 2021
 …WINTER STORM WARNING NOW IN EFFECT UNTIL 9 PM CST THIS
 EVENING…
 WHAT…Freezing rain expected today, possibly mixed with sleet.
 Total ice accumulations of one tenth to three tenths of an
 inch. Temperatures falling into the teens Monday night with wind
 chills in the single digits.
 WHERE…Walker and Tuscaloosa Counties.
 WHEN…Until 9 PM CST this evening.
 IMPACTS…Power outages and tree damage are likely due to the
 ice. Travel could be nearly impossible. The hazardous
 conditions could impact the morning and evening commute. 
 PRECAUTIONARY/PREPAREDNESS ACTIONS…
 If you must travel, keep an extra flashlight, food, and water in
 your vehicle in case of an emergency.

Winter Storm Watch In Effect

SUMMARY: Winter Storm Watches and Winter Weather Advisories are in effect as a strong cold front approaches from the west. Sunday night through Monday night dangerous travel conditions can be expected due to water freezing on roadways.

DISCUSSION: Light drizzle/rain will begin to change over to all heavy precipitation across northwest Alabama Sunday evening and overnight. Travel is going to be very dangerous as any precipitation will quickly freeze causing slick driving conditions. There is also the potential for ice accumulations which could freeze on branches, power lines and cause power outages.

A Winter Storm Watch has now been issued for much of the Tennessee Valley. Significant ice accumulations from Sunday evening thru Monday night will translate into very hazardous travel conditions due to ice & sleet covered roadways. Limit travel if at all possible late Sunday thru Monday night & have your Winter Emergency Kit ready!

URGENT - WINTER WEATHER MESSAGE
 National Weather Service Huntsville AL
 230 PM CST Sat Feb 13 2021
 ALZ001>005-TNZ076-096-097-140600-
 /O.NEW.KHUN.WS.A.0001.210215T0000Z-210216T1200Z/
 Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Moore-Lincoln-
 Franklin TN-
 Including the cities of Florence, Muscle Shoals, Sheffield,
 Tuscumbia, Russellville, Red Bay, Moulton, Town Creek, Athens,
 Lynchburg, Fayetteville, Winchester, Sewanee, Decherd,
 Estill Springs, and Cowan
 230 PM CST Sat Feb 13 2021
 …WINTER STORM WATCH IN EFFECT FROM SUNDAY EVENING THROUGH LATE
 MONDAY NIGHT…
 WHAT…Heavy mixed precipitation possible. Total snow and sleet
 accumulations of up to 3 inches and ice accumulations of one tenth
 to one quarter of an inch possible.
 WHERE…Lauderdale, Colbert, Franklin, Lawrence and Limestone
 counties.
 WHEN…From Sunday evening through late Monday night.
 IMPACTS…Travel could become extremely hazardous.
 ADDITIONAL DETAILS…Two periods of wintry precipitation are
 expected. A period of freezing rain or freezing drizzle is
 expected to develop Sunday evening and overnight. This will
 produce icy conditions, especially on bridges and overpasses.
 A mixture of freezing rain and sleet will develop Monday
 afternoon and last into Monday night. The precipitation may mix
 with or change to snow for a period Monday night. 
 PRECAUTIONARY/PREPAREDNESS ACTIONS…
 A Winter Storm Watch means there is a potential for significant
 snow, sleet, or ice accumulations that may impact travel. Continue
 to monitor the latest forecasts.
URGENT - WINTER WEATHER MESSAGE
 National Weather Service Huntsville AL
 230 PM CST Sat Feb 13 2021
 ALZ006-007-016-140600-
 /O.NEW.KHUN.WS.A.0001.210215T2100Z-210216T1200Z/
 Madison-Morgan-Cullman-
 Including the cities of Huntsville, Decatur, and Cullman
 230 PM CST Sat Feb 13 2021
 …WINTER STORM WATCH IN EFFECT FROM MONDAY AFTERNOON THROUGH
 LATE MONDAY NIGHT…
 WHAT…Heavy mixed precipitation possible. Total snow and sleet
 accumulations of up to one inch and ice accumulations of one tenth
 to two tenths of an inch possible.
 WHERE…In Alabama, Madison, Morgan and Cullman counties. In
 Tennessee, Moore, Lincoln and Franklin counties.
 WHEN…From Monday afternoon through late Monday night.
 IMPACTS…Travel could become extremely hazardous.
 ADDITIONAL DETAILS…Rain will change to freezing rain and sleet
 late Sunday afternoon evening and overnight. The precipitation
 may mix with or change to snow for a period Monday night. 
 PRECAUTIONARY/PREPAREDNESS ACTIONS…
 A Winter Storm Watch means there is a potential for significant
 snow, sleet, or ice accumulations that may impact travel. Continue
 to monitor the latest forecasts.

URGENT - WINTER WEATHER MESSAGE
 National Weather Service Birmingham AL
 306 PM CST Sat Feb 13 2021
 …A mixture of winter weather expected to impact west Alabama
 beginning Sunday night and lasting through Monday evening…
 ALZ011-012-014-140500-
 /O.NEW.KBMX.WW.Y.0003.210215T0000Z-210215T1200Z/
 /O.NEW.KBMX.WS.A.0001.210215T1200Z-210216T0600Z/
 Marion-Lamar-Winston-
 Including the cities of Hamilton, Sulligent, Vernon,
 and Double Springs
 306 PM CST Sat Feb 13 2021
 …WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM SUNDAY TO 6 AM CST
 MONDAY…
 …WINTER STORM WATCH IN EFFECT FROM MONDAY MORNING THROUGH
 MONDAY EVENING…
 WHAT…For the Winter Weather Advisory, freezing rain expected.
 Total ice accumulations of around one tenth of an inch. For the
 Winter Storm Watch, a mixture of freezing rain and sleet likely.
 Total ice accumulations of one tenth to three tenths of an inch.
 WHERE…Marion, Lamar and Winston Counties.
 WHEN…For the Winter Weather Advisory, from 6 PM Sunday to 6
 AM CST Monday. For the Winter Storm Watch, from Monday morning
 through Monday evening.
 IMPACTS…Power outages and tree damage are possible due to ice
 accumulations. Travel could be nearly impossible. 
 PRECAUTIONARY/PREPAREDNESS ACTIONS…
 A Winter Weather Advisory means that periods of sleet or freezing
 rain will cause travel difficulties. Be prepared for slippery
 roads and limited visibilities…and use caution while driving.
 A Winter Storm Watch means there is a potential for significant
 accumulations of freezing rain or sleet that may impact travel.
 Monitor the latest forecasts for updates on this situation.