Alert archive / Alabama / Flash Flood Warnings in 2021
Flash Flood Warning 69, NWS Mobile, AL
NWS Mobile, AL issued this flash flood warning at Aug 30, 2021, 11:47 AM CDT for Clarke County, Washington County, Alabama. It was in force for 5 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
- Aug 30, 2021, 11:47 AM CDT (16:47 UTC)
- Expired
- Aug 30, 2021, 4:30 PM CDT
- In force
- 5 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), 105 km from the middle of the area, began a volume at 16:49 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
Jackson, MS (KJAN), launched 12:00Z, 4.8 hours before the alert went out and 201 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
- 49 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 463 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 387 m²/s²
- 0-3 km storm-relative helicity
- 547 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
974
WGUS54 KMOB 301647
FFWMOB
ALC025-129-302300-
/O.NEW.KMOB.FF.W.0069.210830T1647Z-210830T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
1147 AM CDT Mon Aug 30 2021
The National Weather Service in Mobile has issued a
* Flash Flood Warning for...
Central Clarke County in southwestern Alabama...
Northern Washington County in southwestern Alabama...
* Until 600 PM CDT Monday.
* At 1147 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across 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...
Jackson, Chatom, Saint Stephens, Leroy, Millry, Salitpa, Mays
Crossroads, Frankville, Bigbee, Prestwick, Carson, Winn, Silver
Cross, McVay, Toddtown, Jordan, Koenton, Zimco, Clarksville and
Yarbo.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3144 8834 3168 8833 3170 8816 3170 8812
3170 8811 3170 8809 3174 8781 3145 8777
FLASH FLOOD...RADAR INDICATED
$$2 follow-up statements
135
WGUS74 KMOB 301827
FFSMOB
Flash Flood Statement
National Weather Service Mobile AL
127 PM CDT Mon Aug 30 2021
ALC025-129-302300-
/O.CON.KMOB.FF.W.0069.000000T0000Z-210830T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clarke AL-Washington AL-
127 PM CDT Mon Aug 30 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 6 PM CDT THIS EVENING
FOR CENTRAL CLARKE AND NORTHERN WASHINGTON COUNTIES...
At 127 PM CDT, Doppler radar indicated thunderstorms had produced
heavy rains totalling 2 to 4 inches across the warned area. Flash
flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Jackson, Chatom, Saint Stephens, Leroy, Millry, Salitpa, Mays
Crossroads, Frankville, Bigbee, Prestwick, Carson, Winn, Silver
Cross, McVay, Toddtown, Jordan, Koenton, Zimco, Clarksville and
Yarbo.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3144 8834 3168 8833 3170 8816 3170 8812
3170 8811 3170 8809 3174 8781 3145 8777
FLASH FLOOD...RADAR INDICATED
$$024
WGUS74 KMOB 302130
FFSMOB
Flash Flood Statement
National Weather Service Mobile AL
430 PM CDT Mon Aug 30 2021
ALC025-129-302140-
/O.CAN.KMOB.FF.W.0069.000000T0000Z-210830T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clarke AL-Washington AL-
430 PM CDT Mon Aug 30 2021
...FLASH FLOOD WARNING IS CANCELLED FOR CENTRAL CLARKE AND NORTHERN
WASHINGTON COUNTIES...AN AREAL FLOOD WARNING REMAINS IN EFFECT...
Flooding has transitioned to longer fuse flooding. Please continue
to heed remaining road closures.
A Flash Flood Watch remains in effect until 1200 PM CDT Tuesday for
Portions of Alabama. Portions of northwest Florida.
LAT...LON 3144 8834 3168 8833 3170 8816 3170 8812
3170 8811 3170 8809 3174 8781 3145 8777
$$The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 7:07 PM CDT | Tornado Warning | MOB | Mobile | 25 min |
| Aug 29, 8:19 PM CDT | River Flood Warning | MOB | Escambia | 49 hr |
| Aug 29, 8:21 PM CDT | River Flood Warning | MOB | Covington, Escambia | 38 hr |
| Aug 29, 8:35 PM CDT | River Flood Warning | MOB | Baldwin | 30 hr |
| Aug 29, 11:27 PM CDT | Special Marine Warning | MOB | 93 min | |
| Aug 30, 12:13 AM CDT | Special Marine Warning | MOB | 47 min | |
| Aug 30, 12:59 AM CDT | Special Marine Warning | MOB | 2 hr | |
| Aug 30, 3:24 AM CDT | Flash Flood Warning | MOB | Baldwin, Clarke, Mobile, Washington | 6 hr |
| Aug 30, 4:03 AM CDT | Special Marine Warning | MOB | 117 min | |
| Aug 30, 6:42 AM CDT | Flash Flood Warning | MOB | Baldwin, Escambia | 5 hr |
| Aug 30, 6:46 AM CDT | Special Marine Warning | MOB | 119 min | |
| Aug 30, 8:29 AM CDT | Flash Flood Warning | MOB | Conecuh, Escambia, Monroe | 4 hr |
| Aug 30, 8:32 AM CDT | Flash Flood Warning | MOB | Escambia | 4 hr |
| Aug 30, 8:40 AM CDT | Tornado Warning | MOB | Conecuh, Escambia | 50 min |
| Aug 30, 9:00 AM CDT | Flash Flood Warning | MOB | Clarke, Conecuh, Escambia, Monroe, Wilcox | 4 hr |
| Aug 30, 9:12 AM CDT | Flash Flood Warning | MOB | Conecuh, Escambia | 4 hr |
| Aug 30, 9:20 AM CDT | Areal Flood Warning | MOB | Baldwin, Clarke, Mobile, Washington | 8 hr |
| Aug 30, 10:26 AM CDT | Flash Flood Warning | MOB | Mobile | 6 hr |
| Aug 30, 10:51 AM CDT | Special Marine Warning | MOB | 54 min | |
| Aug 30, 10:55 AM CDT | Tornado Warning | MOB | Mobile, Washington | 25 min |
| Aug 30, 11:57 AM CDT | Flash Flood Warning | MOB | Baldwin, Clarke, Mobile, Washington | 5 hr |
| Aug 30, 12:03 PM CDT | Flash Flood Warning | MOB | Escambia | 75 min |
| Aug 30, 12:23 PM CDT | Tornado Warning | MOB | Baldwin, Mobile | 21 min |
| Aug 30, 12:30 PM CDT | Tornado Warning | MOB | Baldwin, Clarke, Mobile, Washington | 45 min |
| Aug 30, 1:08 PM CDT | Tornado Warning | MOB | Clarke | 52 min |
| Aug 30, 1:39 PM CDT | Tornado Warning | MOB | Clarke, Wilcox | 39 min |
| Aug 30, 3:57 PM CDT | Special Marine Warning | MOB | 48 min | |
| Aug 30, 4:11 PM CDT | Coastal Flood Warning | MOB | Baldwin, Mobile | 14 hr |
| Aug 30, 4:18 PM CDT | Special Marine Warning | MOB | 87 min | |
| Aug 30, 4:20 PM CDT | Special Marine Warning | MOB | 85 min | |
| Aug 30, 5:05 PM CDT | Special Weather Statement | MOB | Covington | 55 min |
| Aug 30, 5:19 PM CDT | Areal Flood Warning | MOB | Baldwin, Clarke, Mobile, Washington | 14 hr |
| Aug 30, 5:29 PM CDT | Special Marine Warning | MOB | 91 min | |
| Aug 30, 6:46 PM CDT | Special Marine Warning | MOB | 89 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.