Alert archive / Alabama / Special Weather Statements in 2021
Special Weather Statement, NWS Huntsville, AL
NWS Huntsville, AL issued this special weather statement at Aug 21, 2021, 12:19 PM CDT for Lawrence County, Limestone County, Madison County, Alabama. It was in force for 41 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 21, 2021, 12:19 PM CDT (17:19 UTC)
- Expired
- Aug 21, 2021, 1:00 PM CDT
- In force
- 41 min
- Issued by
- NWS Huntsville, AL
- Hail
- 0.00 in
- Wind
- 30
Counties Lawrence County, AL, Limestone County, AL, Madison County, AL
The radar
The Northeast Alabama radar (KHTX), 86 km from the middle of the area, began a volume at 17:22 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 5.3 hours before the alert went out and 162 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 1243 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 488 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- -5 m²/s²
- 0-3 km storm-relative helicity
- 41 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.9
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Huntsville, AL wrote its last area forecast discussion before this special weather statement went out at Aug 21, 9:57 AM CDT, 2 hours 22 minutes earlier.
Area forecast discussion, Aug 21, 9:57 AM CDT, 2 hours 22 minutes before
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<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
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The site you requested is temporarily down for maintenance or an unexpected outage.
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</html>Hazardous weather outlook, Aug 21, 11:51 AM CDT, 28 minutes before
Hazardous Weather Outlook National Weather Service Huntsville AL 1151 AM CDT Sat Aug 21 2021 ALZ001>010-016-TNZ076-096-097-220800- Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan- Marshall-Jackson-DeKalb-Cullman-Moore-Lincoln-Franklin TN- 1151 AM CDT Sat Aug 21 2021 This Hazardous Weather Outlook is for north central Alabama, northeast Alabama, northwest Alabama and southern middle Tennessee. .DAY ONE...This afternoon and tonight. Showers and thunderstorms will continue on and off through this afternoon and evening. The main hazard will be localized flash flooding, but damaging winds will also be possible with stronger storms. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Isolated to scattered thunderstorms are forecast Sunday. Additional chances for afternoon and evening showers and thunderstorms will return Wednesday through Friday. Temperatures will increase early next week with humidity remaining elevated. This combination will lead to maximum heat index values of around 100 degrees, especially along and west of Interstate 65. .SPOTTER INFORMATION STATEMENT... Activation of storm spotters and emergency management personnel is not anticipated at this time.
In the hours before
Special weather statement, Aug 21, 11:38 AM CDT, 41 minutes before
Special Weather Statement
National Weather Service Huntsville AL
1138 AM CDT Sat Aug 21 2021
ALZ005-006-TNZ096-211730-
Madison AL-Limestone AL-Lincoln TN-
1138 AM CDT Sat Aug 21 2021
...A strong thunderstorm will impact portions of northwestern
Madison, Limestone and southwestern Lincoln Counties through 1230 PM
CDT...
At 1138 AM CDT, Doppler radar was tracking a band of strong
thunderstorms centered near Ardmore, or 14 miles southeast of
Pulaski, moving southeast at 20 mph.
HAZARD...Winds in excess of 30 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Northern Huntsville, Athens, Meridianville, Ardmore, Harvest, Tanner,
Elkmont, Lester, Cartwright and French Mill.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm and may lead
to very low visibility and localized flooding. Do not drive your
vehicle through flooded roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3483 8655 3469 8705 3499 8721 3500 8721
3499 8684 3514 8683 3516 8677
TIME...MOT...LOC 1638Z 321DEG 19KT 3501 8693
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...30 MPH
KulaSpecial weather statement, Aug 21, 12:19 PM CDT, 0 minutes before
Special Weather Statement
National Weather Service Huntsville AL
1219 PM CDT Sat Aug 21 2021
ALZ001-002-004>007-211800-
Lawrence AL-Madison AL-Lauderdale AL-Morgan AL-Limestone AL-
Colbert AL-
1219 PM CDT Sat Aug 21 2021
...Strong thunderstorms will impact portions of western Madison,
eastern Lauderdale, Limestone, southeastern Colbert, northern Morgan
and northern Lawrence Counties through 100 PM CDT...
At 1218 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Killen to Rogersville to near Harvest.
Movement was south at 20 mph.
HAZARD...Winds in excess of 30 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Huntsville, Decatur, Madison, Athens, Moulton, Meridianville,
Redstone Arsenal, Moores Mill, Hazel Green and Priceville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with these storms and may lead
to localized flooding and very low visibility. Do not drive your
vehicle through flooded roadways.
If on or near Wheeler Lake, get out of the water and move indoors or
inside a vehicle. Remember, lightning can strike out to 10 miles
from the parent thunderstorm. If you can hear thunder, you are close
enough to be struck by lightning. Move to safe shelter now! Do not
be caught on the water in a thunderstorm.
&&
LAT...LON 3456 8636 3446 8714 3457 8752 3496 8760
3487 8731 3497 8661
TIME...MOT...LOC 1718Z 341DEG 19KT 3489 8750 3482 8729 3490 8668
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...30 MPH
KulaThe office that day
Everything else NWS Huntsville, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 11:38 AM CDT | Special Weather Statement | HUN | Limestone | 52 min |
| Aug 21, 12:43 PM CDT | Special Weather Statement | HUN | Franklin | 47 min |
| Aug 21, 1:04 PM CDT | Special Weather Statement | HUN | Lawrence, Madison, Morgan | 41 min |
| Aug 21, 1:52 PM CDT | Special Weather Statement | HUN | Cullman, Morgan | 38 min |
| Aug 21, 2:25 PM CDT | Special Weather Statement | HUN | Cullman | 50 min |
| Aug 21, 2:31 PM CDT | Special Weather Statement | HUN | Lawrence | 44 min |
| Aug 21, 3:09 PM CDT | Special Weather Statement | HUN | Cullman | 51 min |
| Aug 21, 3:15 PM CDT | Severe Thunderstorm Warning | HUN | Cullman | 30 min |
| Aug 21, 6:16 PM CDT | Severe Thunderstorm Warning | HUN | Colbert | 44 min |
| Aug 21, 6:24 PM CDT | Tornado Warning | HUN | Colbert | 23 min |
| Aug 21, 6:58 PM CDT | Special Weather Statement | HUN | Franklin | 47 min |
Nearby
Special Weather Statements in Alabama, 2021Every special weather statement in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.