Alert archive / Alabama / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 55, NWS Huntsville, AL
NWS Huntsville, AL issued this severe thunderstorm warning at May 22, 2020, 7:09 PM CDT for Colbert County, Lauderdale County, Alabama. It was in force for 25 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 22, 2020, 7:09 PM CDT (00:09 UTC)
- Expired
- May 22, 2020, 7:34 PM CDT
- In force
- 25 min
- Issued by
- NWS Huntsville, AL
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Colbert County, AL, Lauderdale County, AL
The radar
The Columbus AFB radar (KGWX), 115 km from the middle of the area, began a volume at 00:13 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 00:00Z, 0.2 hours before the alert went out and 180 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
- 167 J/kg
- Mixed-layer CIN
- -45 J/kg
- Mixed-layer LCL
- 857 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 100 m²/s²
- 0-3 km storm-relative helicity
- 193 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
What forecasters said that day
The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at May 22, 6:54 PM CDT, 15 minutes earlier.
Area forecast discussion, May 22, 6:54 PM CDT, 15 minutes before
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</html>Hazardous weather outlook, May 22, 2:12 PM CDT, 4 hours 57 minutes before
Hazardous Weather Outlook National Weather Service Huntsville AL 212 PM CDT Fri May 22 2020 ALZ001>010-016-TNZ076-096-097-231015- Lauderdale-Colbert-Franklin AL-Lawrence-Limestone-Madison-Morgan- Marshall-Jackson-DeKalb-Cullman-Moore-Lincoln-Franklin TN- 212 PM CDT Fri May 22 2020 This Hazardous Weather Outlook is for north Alabama and portions of southern middle Tennessee. .DAY ONE...Tonight... Isolated thunderstorms are possible, mainly during the evening hours. .DAYS TWO THROUGH SEVEN...Saturday through Thursday... Chances for thunderstorms will occur each day mainly during the afternoons and evenings through at least Thursday. .SPOTTER INFORMATION STATEMENT... Activation of storm spotters and emergency management personnel is not anticipated at this time.
In the hours before
Special weather statement, May 22, 7:02 PM CDT, 7 minutes before
Special Weather Statement
National Weather Service Huntsville AL
702 PM CDT Fri May 22 2020
ALZ001-002-230030-
Lauderdale AL-Colbert AL-
702 PM CDT Fri May 22 2020
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN LAUDERDALE AND
NORTHWESTERN COLBERT COUNTIES UNTIL 730 PM CDT...
At 701 PM CDT, Doppler radar was tracking a strong thunderstorm over
Pickwick Dam, or near Pickwick Landing State Park, moving southeast
at 30 mph.
Winds in excess of 40 mph will be possible with this storm.
Locations impacted include...
Waterloo and Riverton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike several miles away from a thunderstorm. Seek a
safe shelter inside a building or vehicle.
If on or near Pickwick Dam, 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 3501 8796 3500 8795 3478 8805 3482 8811
3489 8810 3492 8816 3496 8817 3500 8820
3501 8820
TIME...MOT...LOC 0001Z 294DEG 26KT 3503 8828
KTWThe office that day
Everything else NWS Huntsville, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 22, 7:28 PM CDT | Special Weather Statement | HUN | Morgan | 47 min |
| May 22, 7:42 PM CDT | Special Weather Statement | HUN | Colbert, Lauderdale | 48 min |
| May 22, 7:53 PM CDT | Special Weather Statement | HUN | Blount | 22 min |
| May 22, 8:14 PM CDT | Special Weather Statement | HUN | Limestone | 46 min |
| May 22, 8:18 PM CDT | Severe Thunderstorm Warning | HUN | Cullman, Morgan | 27 min |
| May 22, 8:26 PM CDT | Special Weather Statement | HUN | Marshall | 34 min |
| May 22, 8:30 PM CDT | Severe Thunderstorm Warning | HUN | Marshall | 16 min |
| May 22, 9:00 PM CDT | Severe Thunderstorm Warning | HUN | Madison | 34 min |
| May 22, 9:08 PM CDT | Special Weather Statement | HUN | Limestone | 52 min |
| May 22, 9:26 PM CDT | Special Weather Statement | HUN | Jackson | 49 min |
| May 22, 9:30 PM CDT | Severe Thunderstorm Warning | HUN | Jackson | 19 min |
| May 23, 9:43 AM CDT | Special Weather Statement | HUN | Franklin | 32 min |
| May 23, 4:11 PM CDT | Special Weather Statement | HUN | Franklin | 19 min |
| May 23, 4:44 PM CDT | Special Weather Statement | HUN | Colbert | 46 min |
| May 23, 5:13 PM CDT | Special Weather Statement | HUN | Lawrence | 32 min |
| May 23, 6:05 PM CDT | Special Weather Statement | HUN | Lawrence | 40 min |
| May 23, 6:24 PM CDT | Special Weather Statement | HUN | Limestone | 36 min |
| May 23, 6:28 PM CDT | Special Weather Statement | HUN | Cullman | 17 min |
| May 23, 6:45 PM CDT | Special Weather Statement | HUN | Cullman, Morgan | 30 min |
| May 23, 6:49 PM CDT | Special Weather Statement | HUN | Limestone | 26 min |
| May 22, 9:42 PM CDT | Special Weather Statement | HUN | Franklin | 18 min |
Nearby
Severe Thunderstorm Warnings in Alabama, 2020Every severe thunderstorm warning in 2020
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.