Alert archive / Alabama / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 188, NWS Birmingham, AL
NWS Birmingham, AL issued this severe thunderstorm warning at Aug 11, 2020, 2:36 PM CDT for Elmore County, Montgomery County, Alabama. It was in force for 39 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
- Aug 11, 2020, 2:36 PM CDT (19:36 UTC)
- Expired
- Aug 11, 2020, 3:15 PM CDT
- In force
- 39 min
- Issued by
- NWS Birmingham, AL
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Elmore County, AL, Montgomery County, AL
The radar
The Maxwell AFB radar (KMXX), 39 km from the middle of the area, began a volume at 19:39 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
Birmingham, AL (KBMX), launched 12:00Z, 7.6 hours before the alert went out and 103 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
- 953 J/kg
- Mixed-layer CIN
- -99 J/kg
- Mixed-layer LCL
- 1192 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 63 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Birmingham, AL wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 11, 2:31 PM CDT, 5 minutes earlier.
Area forecast discussion, Aug 11, 2:31 PM CDT, 5 minutes before
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</html>Hazardous weather outlook, Aug 11, 2:20 PM CDT, 16 minutes before
Hazardous Weather Outlook National Weather Service Birmingham AL 220 PM CDT Tue Aug 11 2020 ALZ011>015-017>050-122230- Marion-Lamar-Fayette-Winston-Walker-Blount-Etowah-Calhoun-Cherokee- Cleburne-Pickens-Tuscaloosa-Jefferson-Shelby-St. Clair-Talladega- Clay-Randolph-Sumter-Greene-Hale-Perry-Bibb-Chilton-Coosa-Tallapoosa- Chambers-Marengo-Dallas-Autauga-Lowndes-Elmore-Montgomery-Macon- Bullock-Lee-Russell-Pike-Barbour- 220 PM CDT Tue Aug 11 2020 This Hazardous Weather Outlook is for the counties served by the National Weather Service office in Birmingham. .DAY ONE...Outlook through Tonight. Isolated strong to severe thunderstorms are possible this afternoon. Brief damaging wind gusts of 60 mph or more and hail up to quarter size could occur. Heat indices may approach 105 degrees for areas along and west of Interstate 65 this afternoon. Take extra precautions while outside. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Heat indices may approach 105 degrees Wednesday afternoon. Take extra precautions while outside. .SPOTTER INFORMATION STATEMENT... Activation of storm spotters and emergency management may be needed this afternoon and evening. Please follow all local, state, and CDC guidelines in regards to travel.
In the hours before
Local storm report, Aug 11, 1:57 PM CDT, 39 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
157 PM CDT TUE AUG 11 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0150 PM TSTM WND GST DANNELLY FIELD 32.30N 86.39W
08/11/2020 E59 MPH MONTGOMERY AL ASOS
MGM 51KTS 1850.
&&
MALSpecial weather statement, Aug 11, 2:01 PM CDT, 35 minutes before
Special Weather Statement
National Weather Service Birmingham AL
201 PM CDT Tue Aug 11 2020
ALZ042-111930-
Lowndes AL-
201 PM CDT Tue Aug 11 2020
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN LOWNDES COUNTY UNTIL
230 PM CDT...
At 201 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Hayneville to near Logan. Movement was
southeast at 10 mph.
Winds in excess of 40 mph will be possible with these storms.
Locations impacted include...
Fort Deposit, Mosses, Hayneville, Gordonville, Logan, Beechwood,
Calhoun and Letohatchee.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3215 8672 3225 8661 3216 8646 3210 8641
3205 8641 3204 8640 3201 8640 3196 8641
3196 8656
TIME...MOT...LOC 1901Z 311DEG 11KT 3218 8662 3200 8642
89^GSatterwhiteSpecial weather statement, Aug 11, 2:14 PM CDT, 22 minutes before
Special Weather Statement
National Weather Service Birmingham AL
214 PM CDT Tue Aug 11 2020
ALZ040-042-111945-
Lowndes AL-Dallas AL-
214 PM CDT Tue Aug 11 2020
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN LOWNDES AND EAST
CENTRAL DALLAS COUNTIES UNTIL 245 PM CDT...
At 214 PM CDT, Doppler radar was tracking a strong thunderstorm over
Benton, or 11 miles east of Selmont-West Selmont, moving east at 5
mph.
Winds in excess of 40 mph will be possible with this storm.
Locations impacted include...
White Hall, Benton and Tyler.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to 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 3221 8688 3233 8692 3240 8684 3236 8681
3231 8682 3231 8681 3234 8677 3239 8678
3239 8675 3240 8672 3236 8671 3235 8668
3236 8666 3232 8665 3221 8667 3219 8678
TIME...MOT...LOC 1914Z 274DEG 4KT 3232 8681
89^GSatterwhiteSpecial weather statement, Aug 11, 2:21 PM CDT, 15 minutes before
Special Weather Statement
National Weather Service Birmingham AL
221 PM CDT Tue Aug 11 2020
ALZ024-111945-
Jefferson AL-
221 PM CDT Tue Aug 11 2020
...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL JEFFERSON COUNTY
UNTIL 245 PM CDT...
At 221 PM CDT, Doppler radar was tracking a strong thunderstorm near
Tannehill Ironworks State Park, or near Bessemer. This storm was
nearly stationary.
Pea size hail and winds in excess of 40 mph will be possible with
this storm.
Locations impacted include...
Bessemer, Promenade Tannehill, Bent Brook Golf Club, Bessemer Airport
and McAdory.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to 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 3334 8700 3331 8690 3330 8693 3328 8693
3327 8695 3327 8697 3325 8698 3325 8707
3328 8707 3328 8708 3330 8708
TIME...MOT...LOC 1921Z 274DEG 4KT 3329 8701
89^GSatterwhiteSpecial weather statement, Aug 11, 2:25 PM CDT, 11 minutes before
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</html>Local storm report, Aug 11, 2:33 PM CDT, 3 minutes before
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</html>The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 7:17 PM CDT | Special Weather Statement | BMX | Russell | 43 min |
| Aug 10, 7:24 PM CDT | Special Weather Statement | BMX | Pike | 51 min |
| Aug 10, 7:49 PM CDT | Special Weather Statement | BMX | Barbour | 41 min |
| Aug 10, 8:31 PM CDT | Special Weather Statement | BMX | Barbour | 29 min |
| Aug 10, 9:24 PM CDT | Special Weather Statement | BMX | Marshall | 51 min |
| Aug 11, 12:08 PM CDT | Special Weather Statement | BMX | Chilton | 37 min |
| Aug 11, 12:27 PM CDT | Special Weather Statement | BMX | Wilcox | 33 min |
| Aug 11, 12:47 PM CDT | Severe Thunderstorm Warning | BMX | Barbour, Pike | 23 min |
| Aug 11, 1:23 PM CDT | Special Weather Statement | BMX | Tallapoosa | 37 min |
| Aug 11, 1:24 PM CDT | Special Weather Statement | BMX | Elmore | 36 min |
| Aug 11, 1:30 PM CDT | Special Weather Statement | BMX | Lowndes | 30 min |
| Aug 11, 1:37 PM CDT | Severe Thunderstorm Warning | BMX | Lowndes | 22 min |
| Aug 11, 1:56 PM CDT | Special Weather Statement | BMX | Montgomery | 34 min |
| Aug 11, 2:01 PM CDT | Special Weather Statement | BMX | Lowndes | 29 min |
| Aug 11, 2:14 PM CDT | Special Weather Statement | BMX | Lowndes | 31 min |
| Aug 11, 2:21 PM CDT | Special Weather Statement | BMX | Jefferson | 24 min |
| Aug 11, 2:25 PM CDT | Special Weather Statement | BMX | Lee | 35 min |
| Aug 11, 2:55 PM CDT | Special Weather Statement | BMX | Autauga | 35 min |
| Aug 11, 3:02 PM CDT | Special Weather Statement | BMX | Pike | 28 min |
| Aug 11, 3:05 PM CDT | Severe Thunderstorm Warning | BMX | Pike | 28 min |
| Aug 11, 3:12 PM CDT | Special Weather Statement | BMX | Macon | 48 min |
| Aug 11, 3:12 PM CDT | Severe Thunderstorm Warning | BMX | Autauga, Dallas | 15 min |
| Aug 11, 3:37 PM CDT | Special Weather Statement | BMX | Pike | 38 min |
| Aug 11, 4:00 PM CDT | Special Weather Statement | BMX | Bullock | 30 min |
| Aug 11, 4:20 PM CDT | Special Weather Statement | BMX | Bullock | 40 min |
| Aug 11, 5:11 PM CDT | Special Weather Statement | BMX | Perry | 34 min |
| Aug 11, 5:32 PM CDT | Special Weather Statement | BMX | Marengo | 43 min |
| Aug 11, 5:37 PM CDT | Special Weather Statement | BMX | Jefferson | 23 min |
| Aug 11, 5:59 PM CDT | Special Weather Statement | BMX | Shelby | 31 min |
| Aug 11, 6:02 PM CDT | Special Weather Statement | BMX | Perry | 43 min |
| Aug 11, 6:06 PM CDT | Special Weather Statement | BMX | Greene | 39 min |
| Aug 11, 6:55 PM CDT | Special Weather Statement | BMX | Tuscaloosa | 35 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.