Alert archive / Alabama / Flash Flood Warnings in 2021
Flash Flood Warning 26, NWS Mobile, AL
NWS Mobile, AL issued this flash flood warning at May 12, 2021, 3:46 AM CDT for Clarke County, Washington County, Alabama. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 12, 2021, 3:46 AM CDT (08:46 UTC)
- Expired
- May 12, 2021, 7:55 AM CDT
- In force
- 4 hr
- Issued by
- NWS Mobile, AL
- Area
- Storm-based polygon
- Flood severity
- None
Counties Clarke County, AL, Washington County, AL
The radar
The Mobile radar (KMOB), 77 km from the middle of the area, began a volume at 08:47 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
Slidell Radar S, LA (KSIL), launched 00:00Z, 8.8 hours before the alert went out and 212 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
- 618 J/kg
- Mixed-layer CIN
- -59 J/kg
- Mixed-layer LCL
- 924 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 135 m²/s²
- 0-3 km storm-relative helicity
- 212 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 4.7
The text
As transmitted.
772
WGUS54 KMOB 120846
FFWMOB
ALC025-129-121445-
/O.NEW.KMOB.FF.W.0026.210512T0846Z-210512T1445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
346 AM CDT Wed May 12 2021
The National Weather Service in Mobile has issued a
* Flash Flood Warning for...
South Central Clarke County in southwestern Alabama...
Southeastern Washington County in southwestern Alabama...
* Until 945 AM CDT.
* At 346 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2 inches of rain
have fallen. 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...
Carlton, Walker Springs and Choctaw Bluff.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3116 8797 3132 8800 3138 8787 3146 8777
3134 8772 3133 8775 3136 8776 3133 8779
3130 8776 3129 8779 3128 8778 3127 8780
3128 8783 3123 8784 3123 8786 3120 8785
3121 8787 3120 8787
FLASH FLOOD...RADAR INDICATED
$$1 follow-up statement
382
WGUS74 KMOB 121255
FFSMOB
Flash Flood Statement
National Weather Service Mobile AL
755 AM CDT Wed May 12 2021
ALC025-129-121305-
/O.CAN.KMOB.FF.W.0026.000000T0000Z-210512T1445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clarke AL-Washington AL-
755 AM CDT Wed May 12 2021
...FLASH FLOOD WARNING IS CANCELLED FOR SOUTH CENTRAL CLARKE AND
SOUTHEASTERN WASHINGTON COUNTIES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
A Flash Flood Watch remains in effect until 600 PM CDT Wednesday for
Portions of southwest Alabama. Portions of southeast Mississippi.
LAT...LON 3116 8797 3132 8800 3138 8787 3146 8777
3134 8772 3133 8775 3136 8776 3133 8779
3130 8776 3129 8779 3128 8778 3127 8780
3128 8783 3123 8784 3123 8786 3120 8785
3121 8787 3120 8787
$$The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 12, 2:55 AM CDT | Special Weather Statement | MOB | Washington | 65 min |
| May 12, 3:31 AM CDT | Special Weather Statement | MOB | Baldwin, Mobile | 44 min |
| May 12, 4:06 AM CDT | Special Weather Statement | MOB | Baldwin, Mobile | 54 min |
| May 12, 4:12 AM CDT | Areal Flood Advisory | MOB | Baldwin, Mobile | 3 hr |
| May 12, 4:20 AM CDT | Special Marine Warning | MOB | 85 min | |
| May 12, 4:41 AM CDT | Special Marine Warning | MOB | 94 min | |
| May 12, 4:56 AM CDT | Severe Thunderstorm Warning | MOB | Mobile | 24 min |
| May 12, 5:01 AM CDT | Areal Flood Advisory | MOB | Baldwin, Escambia | 3 hr |
| May 12, 5:04 AM CDT | Special Weather Statement | MOB | Baldwin, Escambia | 86 min |
| May 12, 6:01 AM CDT | Severe Thunderstorm Warning | MOB | Conecuh, Covington, Escambia | 44 min |
| May 12, 6:24 AM CDT | Special Marine Warning | MOB | 96 min | |
| May 12, 6:29 AM CDT | Severe Thunderstorm Warning | MOB | Covington | 64 min |
| May 12, 6:35 AM CDT | Special Marine Warning | MOB | 55 min | |
| May 12, 6:52 AM CDT | Areal Flood Advisory | MOB | Conecuh, Covington, Escambia | 3 hr |
| May 12, 6:56 AM CDT | Severe Thunderstorm Warning | MOB | Covington, Crenshaw | 35 min |
| May 12, 7:18 AM CDT | Special Marine Warning | MOB | 87 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.