Alert archive / Alabama / Flash Flood Warnings in 2021
Flash Flood Warning 109, NWS Mobile, AL
NWS Mobile, AL issued this flash flood warning at Dec 18, 2021, 1:29 PM CST for Conecuh County, Escambia County, Alabama. It was in force for 6 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
- Dec 18, 2021, 1:29 PM CST (19:29 UTC)
- Expired
- Dec 18, 2021, 7:30 PM CST
- In force
- 6 hr
- Issued by
- NWS Mobile, AL
- Area
- Storm-based polygon
- Flood severity
- None
Counties Conecuh County, AL, Escambia County, AL
The radar
The Mobile radar (KMOB), 131 km from the middle of the area, began a volume at 19:31 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, 7.5 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
- 366 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 585 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 200 m²/s²
- 0-3 km storm-relative helicity
- 201 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 5.8
The text
As transmitted.
540
WGUS54 KMOB 181929
FFWMOB
ALC035-053-190130-
/O.NEW.KMOB.FF.W.0109.211218T1929Z-211219T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
129 PM CST Sat Dec 18 2021
The National Weather Service in Mobile has issued a
* Flash Flood Warning for...
Southeastern Conecuh County in south central Alabama...
North Central Escambia County in south central Alabama...
* Until 730 PM CST Saturday.
* At 129 PM CST, 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 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...
Evergreen, Castleberry, Old Sparta, Nymph, London, Centerville,
Rabb, Appleton and Old Town.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
&&
LAT...LON 3123 8719 3128 8714 3147 8693 3143 8678
3117 8707 3118 8712
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR
$$
Black1 follow-up statement
576
WGUS74 KMOB 182128
FFSMOB
Flash Flood Statement
National Weather Service Mobile AL
328 PM CST Sat Dec 18 2021
ALC035-053-190130-
/O.CON.KMOB.FF.W.0109.000000T0000Z-211219T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Conecuh AL-Escambia AL-
328 PM CST Sat Dec 18 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM CST THIS
EVENING FOR SOUTHEASTERN CONECUH AND NORTH CENTRAL ESCAMBIA
COUNTIES...
At 328 PM CST, the public reported thunderstorms producing heavy
rain across the warned area with roadways beginning to flood in
Castleberry, Alabama. Between 3 and 4 inches of rain have fallen.
The expected rainfall rate is 1 to 2 inches in 1 hour. Additional
rainfall amounts of 1 to 2 inches are possible in the warned area.
Flash flooding is already occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Public reported.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Evergreen, Castleberry, Old Sparta, Nymph, London, Centerville,
Rabb, Appleton and Old Town.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
&&
LAT...LON 3123 8719 3128 8714 3147 8693 3143 8678
3117 8707 3118 8712
FLASH FLOOD...OBSERVED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR
$$
BlackThe office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 17, 6:42 PM CST | Areal Flood Advisory | MOB | Mobile | 3 hr |
| Dec 18, 5:35 AM CST | Marine Dense Fog Advisory | MOB | 4 hr | |
| Dec 18, 5:59 AM CST | Special Weather Statement | MOB | Wilcox | 46 min |
| Dec 18, 12:57 PM CST | Areal Flood Advisory | MOB | Conecuh, Escambia | 3 hr |
| Dec 18, 1:41 PM CST | Special Weather Statement | MOB | Baldwin | 49 min |
| Dec 18, 1:47 PM CST | Special Weather Statement | MOB | Crenshaw | 43 min |
| Dec 18, 1:56 PM CST | Areal Flood Advisory | MOB | Conecuh, Escambia | 3 hr |
| Dec 18, 3:24 PM CST | Marine Dense Fog Advisory | MOB | 10 hr | |
| Dec 18, 4:54 PM CST | Areal Flood Advisory | MOB | Baldwin, Escambia, Mobile | 3 hr |
| Dec 18, 5:01 PM CST | Special Weather Statement | MOB | Mobile | 44 min |
| Dec 18, 5:59 PM CST | Areal Flood Advisory | MOB | Covington | 3 hr |
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.