Freeze Warning In Effect

SUMMARY: (ENTER SUMMARY OF WHAT IS IN EFFECT)

TIMING: (ENTER THE TIMING FOR WHAT IS IN EFFECT)

Areas Affected: (ENTER THE AREAS AFFECTED AS IT PERTAINS TO OUR COVERAGE ZONES)

POTENTIAL HAZARDS: (ENTER THE HAZARDS THAT COULD HAPPEN)


NWS GRAPHICS/DETAILS

(ENTER THE GRAPHICS, DETAILS, INCLUDING PRODUCT DETAILS AND IMAGES FROM THE NWS. REMEMBER TO USE PREFORMATTING BLOCK FOR PRODUCTS)

...FREEZE WARNING IN EFFECT FROM 9 PM THIS EVENING TO 8 AM CST
SUNDAY...

* WHAT...Sub-freezing temperatures as low as 30 expected.

* WHERE...Portions of north central, northeast and northwest
  Alabama and southern middle Tennessee.

* WHEN...From 9 PM this evening to 8 AM CST Sunday.

* IMPACTS...Frost and freeze conditions will kill crops, other
  sensitive vegetation and possibly damage unprotected outdoor
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.
...FREEZE WARNING IN EFFECT FROM 9 PM THIS EVENING TO 8 AM CST
SUNDAY...

* WHAT...Temperatures 29 to 32 degrees expected.

* WHERE...All of Central Alabama.

* WHEN...From 9 PM this evening to 8 AM CST Sunday.

* IMPACTS...Frost and freeze conditions will kill crops, other
  sensitive vegetation and possibly damage unprotected outdoor
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold. To prevent
freezing and possible bursting of outdoor water pipes they should
be wrapped, drained, or allowed to drip slowly. Those that have
in-ground sprinkler systems should drain them and cover above-
ground pipes to protect them from freezing.

Wind Advisory In Effect

SUMMARY: Gusty winds of 30-40 MPH are possible beginning late Wednesday night through Thursday afternoon.

AREAS: All of the Coverage Area. All of north and central Alabama.

POTENTIAL IMPACTS: Winds of this magnitude can knock down tree branches and cause damages to power lines, gutters, sheds, and outbuildings.


NWS Details

Wind Advisory NWS Huntsville
A Wind Advisory is in effect from 10 PM tonight through 1 PM on Thursday. Southwesterly winds between 15 and 25 mph with gusts up to 40 mph are possible.
Wind Advisory NWS Birmingham
Strong winds will increase late tonight and continue through Thursday. Winds will be sustained
...WIND ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 1 PM CDT
THURSDAY...

* WHAT...Southeast winds 15 to 25 mph with gusts up to 40 mph
  expected.

* WHERE...All of northern Alabama and portions of southern middle
  Tennessee.

* WHEN...From 10 PM this evening to 1 PM CDT Thursday.

* IMPACTS...Gusty winds could blow around unsecured objects.
  Tree limbs could be blown down and a few power outages may
  result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.
...WIND ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 1 PM CDT
THURSDAY...

* WHAT...Southerly winds 15 to 25 mph with gusts up to 40 mph
  expected.

* WHERE...Portions of central Alabama.

* WHEN...From 10 PM this evening to 1 PM CDT Thursday.

* IMPACTS...Gusty winds could blow around unsecured objects or
  decorations. Tree limbs and damaged or weakened trees could be
  blown down and a few power outages may result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

Small Risk For Severe Storms Ahead Of Cold Front

Update 3:09 PM. Updated SPC graphic for Alabama, no other changes.

SUMMARY: Ahead of a strong cold front, showers and thunderstorms will occur late this evening into the overnight hours. Some of these storms could be strong to severe especially across northwest Alabama.

NWS Graphics:

NWS Huntsville Svr 10/15/21
A few strong/severe storms are expected later this evening/overnight as a cold front sweeps across the region. The main threats with the strongest storms will be damaging winds, but a tornado or two cannot be ruled out. Stay weather aware this evening

TIMING: Beginning around 9:00 PM this evening (10/15) and lasting through 2:00 AM across northwest Alabama.

Potential Hazards: Heavy rainfall and strong-locally damaging winds gusts from 40-60 MPH. A tornado or two cannot be ruled out.

Potential Impacts: Heavy rainfall along with gusty winds can knock down trees into power lines, causing power outages. Heavy rainfall could cause flooding in some areas. Damaging winds are winds of 58 MPH or stronger, which could damage roofs, outbuildings, sidings, gutters, sheds, and trees. Gusty winds are also possible outside of thunderstorms. Tornadoes – if any – will be brief and weak but is still enough to cause damage to mobile homes and roofs.

CONFIDENCE IN POTENTIAL HAZARDS: 9/10. Very confident.

Recommended Preparedness Actions: Stay weather aware this evening as the cold front gets closer. Stay inside, and have multiple ways to receive warnings should one be issued. Take the warning seriously. A Severe Thunderstorm Watch will likely be issued well ahead of the cold front as the storms get closer. If a Tornado Warning is issued – take the Warning seriously, do not wait to see or wait for confirmation because this will be a late-night event where tornadoes will be difficult to confirm.

DISCUSSION

SPC has placed a small corner of the state in a Slight Risk for severe thunderstorms this afternoon and evening, with a Marginal Risk going across the rest of Coverage Zone 1. Seeing no Slight Risk in Coverage Zone 2 will leave any discussions for Central Alabama out. HRRR model data shows storms coming in the form of a line expected to reach the AL/MS border around 03Z (9:00 pm). SBCAPE at the arrival will range from 500-1,000 J/KG and quickly dissipate with the arrival of the front. Updraft Helicity values are not overall impressive but are there nonetheless. This ties in with the STP values at about 2/10, which leaves a non-but-not-zero chance of a tornado as the cold front gets closer.

SCP however is favoring supercell development with the line, but again, it quickly dissipates with the arrival of the cold front. Hard to tie these parameters perfectly together. Graphics below. Stay safe, and get ready for fall after this cold front.

flash flood watch hun

Flash Flood Watch In Effect

Several days of repeated rainfall, where some of the rain could be moderate to heavy at times, could lead to instances of flash flooding across the area. Flash flooding is a dangerous situation. Remember, turn around don’t drown!

The Flash Flood Watch is for the entire Coverage Area.

flash flood watch hun
Flash Flood Watch – NWS Huntsville
flash flood watch bmx
Flash Flood Watch – NWS Birmingham

The Weather Prediction Center has put in a Day 2-3 Moderate/Slight Risk for Excessive Rainfall. The highest amounts are forecasted to be across northeast Alabama. This indicates where flash flooding is most likely to occur.

WPC Day 1
WPC Day 1 Outlook
WPC Day 2
WPC Day 2 Outlook
WPC Day 3
WPC Day 3 Outlook
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Tropical Storm Ida Update

The center of Tropical Storm Ida is currently located near Jackson, MS with maximum wind speeds of 30 MPH. The Tropical Storm Warnings/Storm Surge Warnings are set to expire at 12:30pm. Ida wrecked havoc on New Orleans and knocked out power to 100% of the city, according to Entergy. For an update on restoration from Entergy, see this article:

Closer to home, we are expected to start feeling the impacts from Ida tonight. Wind Advisories and Flash Flood Watches are up for almost our entire Coverage Area:

Tropical Storm Ida – NWS Birmingham
Tropical Storm Ida – NWS Huntsville
Tropical Storm Ida Track – RadarOmega

RAINFALL: The biggest story of any Tropical System is the rainfall. We’re looking to receive anywhere from 4-6″ on the western half of the state, and 2-4″ elsewhere. Flash flooding will also be a concern in some areas that receive repeated heavy rainfall.

[Image of WPC QPF U.S. rainfall potential]
[Image of WPC Flash Flooding/Excessive Rainfall Outlook]

WINDS: Will begin to pick up as Ida nears. Currently the forecast is for 30+ MPH winds with gusts up to 40. Winds could be felt as early as 8:00 PM Monday for west/northwest Alabama. Winds of this magnitude can easily topple over trees and power lines. Trees with saturated ground could fall more easily.

time of arrival graphic

TORNADOES: With any tropical system – especially on the outer edge of the system – there is the potential for tornadoes. Any tornadoes that do develop will be brief and weak (70+ MPH winds)

Please stay weather aware during this time. Heed all Warnings and have multiple ways to receive them.

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Ida Makes Landfall; Potential Local Impacts

As of 12:10 PM August 29th, Hurricane Ida has made landfall as a Category 4 Major Hurricane. The image below is the direct text from the National Hurricane Center.


Around our neck of the woods, we will start seeing impacts from Ida Monday night and Tuesday from west to east. Threats will include flash flooding, strong gusty winds, and a few tornadoes. Flood Watches are in effect for portions of west Alabama up to Interstate 65