Alert archive / Alabama / Flash Flood Warnings in 2021
Flash Flood Warning 73, NWS Mobile, AL
NWS Mobile, AL issued this flash flood warning at Aug 31, 2021, 1:18 AM CDT for 5 counties in Alabama. It was in force for 6 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 31, 2021, 1:18 AM CDT (06:18 UTC)
- Expired
- Aug 31, 2021, 7:15 AM CDT
- In force
- 6 hr
- Issued by
- NWS Mobile, AL
- Area
- Storm-based polygon
- Flood severity
- None
Counties Baldwin County, AL, Clarke County, AL, Mobile County, AL, Monroe County, AL, Washington County, AL
The radar
The Mobile radar (KMOB), 50 km from the middle of the area, began a volume at 06:17 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 31, 5:17 AM CDT | FLASH FLOOD | 2 Nnw Tillmans Corner, AL | PUBLIC REPORT OF LOW WATER CROSSING FLOODED DUE TO HEAVY RAINFALL. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 00:00Z, 6.3 hours before the alert went out and 186 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
- 914 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 811 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 125 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
396
WGUS54 KMOB 310618
FFWMOB
ALC003-025-097-099-129-311215-
/O.NEW.KMOB.FF.W.0073.210831T0618Z-210831T1215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
118 AM CDT Tue Aug 31 2021
The National Weather Service in Mobile has issued a
* Flash Flood Warning for...
Western Monroe County in south central Alabama...
Northwestern Baldwin County in southwestern Alabama...
Southeastern Clarke County in southwestern Alabama...
Mobile County in southwestern Alabama...
Southeastern Washington County in southwestern Alabama...
* Until 715 AM CDT.
* At 118 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2 inches of rain
have fallen. The expected rainfall rate is 1 to 2 inches in 1
hour. Additional rainfall amounts of 1 to 3 inches are possible in
the warned area. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Downtown Mobile, Midtown Mobile, Prichard, Tillmans Corner,
Saraland, Chickasaw, Satsuma, Spanish Fort, Creola, Chunchula,
Stockton, Gulfcrest, Axis, Mount Vernon, Calvert, Semmes, Tanner
Williams, McIntosh, Movico and I65 And AL 225.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 3144 8797 3178 8741 3061 8791 3052 8840
3073 8841
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR
$$
MOB3 follow-up statements
766
WGUS74 KMOB 310753
FFSMOB
Flash Flood Statement
National Weather Service Mobile AL
253 AM CDT Tue Aug 31 2021
ALC003-025-097-099-129-311215-
/O.CON.KMOB.FF.W.0073.000000T0000Z-210831T1215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Baldwin AL-Clarke AL-Mobile AL-Monroe AL-Washington AL-
253 AM CDT Tue Aug 31 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 AM CDT THIS
MORNING FOR WESTERN MONROE, NORTHWESTERN BALDWIN, SOUTHEASTERN
CLARKE, MOBILE AND SOUTHEASTERN WASHINGTON COUNTIES...
At 253 AM CDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 1 and 2 inches of rain have
fallen. The expected rainfall rate is 1 to 2 inches in 1 hour.
Additional rainfall amounts of 1 to 2 inches are possible in the
warned area. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Downtown Mobile, Midtown Mobile, Prichard, Tillmans Corner,
Saraland, Chickasaw, Satsuma, Spanish Fort, Creola, Chunchula,
Stockton, Gulfcrest, Axis, Mount Vernon, Calvert, Semmes, Tanner
Williams, McIntosh, Movico and I65 And AL 225.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 3144 8797 3178 8741 3061 8791 3052 8840
3073 8841
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR
$$
MM613
WGUS74 KMOB 310937
FFSMOB
Flash Flood Statement
National Weather Service Mobile AL
437 AM CDT Tue Aug 31 2021
ALC003-025-097-099-129-311215-
/O.CON.KMOB.FF.W.0073.000000T0000Z-210831T1215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Baldwin AL-Clarke AL-Mobile AL-Monroe AL-Washington AL-
437 AM CDT Tue Aug 31 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 AM CDT THIS
MORNING FOR SOUTHWESTERN MONROE, NORTHWESTERN BALDWIN, SOUTHEASTERN
CLARKE, MOBILE AND SOUTHEASTERN WASHINGTON COUNTIES...
At 437 AM CDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 2 and 3 inches of rain have
fallen. The expected rainfall rate is 1 to 2 inches in 2 hours.
Additional rainfall amounts of 1 to 2 inches are possible in the
warned area. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Downtown Mobile, Midtown Mobile, Prichard, Tillmans Corner,
Saraland, Chickasaw, Satsuma, Spanish Fort, Creola, Chunchula,
Stockton, Gulfcrest, Axis, Mount Vernon, Calvert, Semmes, Tanner
Williams, McIntosh, Movico and I65 And AL 225.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 3144 8797 3145 8791 3155 8758 3157 8751
3061 8791 3058 8807 3052 8840 3073 8841
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 2 HOURS
$$
MM439
WGUS74 KMOB 311211
FFSMOB
Flash Flood Statement
National Weather Service Mobile AL
711 AM CDT Tue Aug 31 2021
ALC003-025-097-099-129-311221-
/O.EXP.KMOB.FF.W.0073.000000T0000Z-210831T1215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Baldwin AL-Clarke AL-Mobile AL-Monroe AL-Washington AL-
711 AM CDT Tue Aug 31 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 715 AM CDT THIS MORNING FOR
SOUTHWESTERN MONROE, NORTHWESTERN BALDWIN, SOUTHEASTERN CLARKE,
MOBILE AND SOUTHEASTERN WASHINGTON COUNTIES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
A Flash Flood Watch remains in effect until 1200 PM CDT for Portions
of Alabama. Portions of northwest Florida.
LAT...LON 3144 8797 3145 8791 3155 8758 3157 8751
3061 8791 3058 8807 3052 8840 3073 8841
$$
MMThe office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 10:22 PM CDT | Flash Flood Warning | MOB | Mobile, Washington | 6 hr |
| Aug 30, 11:27 PM CDT | Tornado Warning | MOB | Mobile | 13 min |
| Aug 31, 3:33 AM CDT | Flash Flood Warning | MOB | Baldwin, Conecuh, Escambia, Monroe | 4 hr |
| Aug 31, 3:42 AM CDT | Special Marine Warning | MOB | 93 min | |
| Aug 31, 4:21 AM CDT | Special Marine Warning | MOB | 54 min | |
| Aug 31, 4:41 AM CDT | Special Marine Warning | MOB | 34 min | |
| Aug 31, 4:52 AM CDT | Severe Thunderstorm Warning | MOB | Covington | 23 min |
| Aug 31, 5:12 AM CDT | Special Marine Warning | MOB | 93 min | |
| Aug 31, 5:17 AM CDT | Special Marine Warning | MOB | 58 min | |
| Aug 31, 5:42 AM CDT | Special Marine Warning | MOB | 63 min | |
| Aug 31, 5:46 AM CDT | Severe Thunderstorm Warning | MOB | Butler, Crenshaw | 44 min |
| Aug 31, 6:04 AM CDT | High Surf Advisory | MOB | Baldwin, Mobile | 12 hr |
| Aug 31, 6:39 AM CDT | Special Marine Warning | MOB | 96 min | |
| Aug 31, 6:42 AM CDT | Special Marine Warning | MOB | 63 min | |
| Aug 31, 6:51 AM CDT | Special Marine Warning | MOB | 36 min | |
| Aug 31, 7:09 AM CDT | Areal Flood Warning | MOB | Baldwin, Clarke, Conecuh, Escambia, Mobile, Monroe and 1 more | 6 hr |
| Aug 31, 7:45 AM CDT | Special Marine Warning | MOB | 90 min | |
| Aug 31, 8:10 AM CDT | Special Marine Warning | MOB | 65 min | |
| Aug 31, 8:28 AM CDT | Special Marine Warning | MOB | 92 min | |
| Aug 31, 9:08 AM CDT | Special Marine Warning | MOB | 97 min |
Nearby
Flash Flood Warnings in Alabama, 2021Every flash flood warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.