Alert archive / Alabama / Flash Flood Warnings in 2021
Flash Flood Warning 37, NWS Birmingham, AL
NWS Birmingham, AL issued this flash flood warning at Jul 19, 2021, 4:55 PM CDT for Jefferson County, Alabama. It was in force for 4 hr. 11 reports 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
- Jul 19, 2021, 4:55 PM CDT (21:55 UTC)
- Expired
- Jul 19, 2021, 9:00 PM CDT
- In force
- 4 hr
- Issued by
- NWS Birmingham, AL
- Area
- Storm-based polygon
- Flood severity
- None
County Jefferson County, AL
The radar
The Birmingham radar (KBMX), 43 km from the middle of the area, began a volume at 21:57 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 |
|---|---|---|---|
| Jul 19, 5:15 PM CDT | FLASH FLOOD | 1 Sw Vestavia Hills, AL | VIDEO SHOWS RUSHING WATER FROM AN ELEVATED AREA ADJACENT TO US 31. WATER IS GOING ONTO THE ROADWAY. LEO ON-SCENE. |
| Jul 19, 5:24 PM CDT | FLASH FLOOD | 1 Sw Dolomite, AL | VIA SPOTTERNETWORK: WATER FLOWING ACROSS FIVE LANES AND IS THREATENING A BUSINESS ALONG THE 800 BLOCK OF ALLISON BONNET MEMORIAL DR. |
| Jul 19, 5:30 PM CDT | FLASH FLOOD | Fairfield, AL | FLOODING ACROSS A ROADWAY IN FAIRFIELD WITH DISABLED VEHICLES. |
| Jul 19, 5:30 PM CDT | FLASH FLOOD | Vestavia Hills, AL | HWY 31 FLOODED IN VESTAVIA HILLS WITH DISABLED VEHICLES. |
| Jul 19, 6:00 PM CDT | FLASH FLOOD | 1 Ssw Vestavia Hills, AL | DEEP WATER SURROUNDING BUSINESSES IN A LOW-LYING AREA. VEHICLES SUBMERGED WITH EVACUATION FROM BUSINESSES VIA RAFTS. |
| Jul 19, 6:00 PM CDT | FLASH FLOOD | 2 Se Vestavia Hills, AL | SIGNIFICANT OVERFLOW OF A TRIPLE PIPE CULVERT. WATER IS NEAR A STRIP MALL BUT NOT ENTERING. |
| Jul 19, 6:00 PM CDT | FLASH FLOOD | 2 Se Vestavia Hills, AL | SIGNIFICANT RISE AND OVERFLOW OF A NARROW WATERWAY. DEEP, FLOWING WATER WAS CROSSING THE INTERSECTION OF ACTON ROAD AND OLD ROCKY RIDGE ROAD. ONE BUSINESS WAS SURROUNDED BY THE WATER PER VIDEO AND PHOTOS. |
| Jul 19, 6:07 PM CDT | FLASH FLOOD | 1 Sw The Summit, AL | CAHABA RIVER ROAD AT ALTADENA ROAD IS WASHED OUT WITH BOTH LANES UNDER WATER. |
| Jul 19, 6:08 PM CDT | FLASH FLOOD | 2 Se Vestavia Hills, AL | FLOOD WATERS IN A STRUCTURE AND IN VEHICLES ALONG OLD ROCKY RIDGE ROAD. |
| Jul 19, 6:10 PM CDT | FLASH FLOOD | 1 Ene Vestavia Hills, AL | ROCKY RIDGE FD HAS CLOSED ACTON ROAD DUE TO FLOODING. WATER RESCUES IN PROGRESS. |
| Jul 19, 6:15 PM CDT | FLASH FLOOD | 2 E Hoover, AL | LITTLE SHADES CREEK IS SWOLLEN. OTHER DEEP FLOWING WATER WAS OBSERVED AT AND AROUND THE LOCH HAVEN DOG PARK. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 9.9 hours before the alert went out and 238 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
- 73 J/kg
- Mixed-layer CIN
- -76 J/kg
- Mixed-layer LCL
- 779 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
123
WGUS54 KBMX 192155
FFWBMX
ALC073-200100-
/O.NEW.KBMX.FF.W.0037.210719T2155Z-210720T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Birmingham AL
455 PM CDT Mon Jul 19 2021
The National Weather Service in Birmingham has issued a
* Flash Flood Warning for...
Central Jefferson County in central Alabama...
* Until 800 PM CDT.
* At 455 PM CDT, Doppler radar indicated heavy rain across the
warned area. Between 1 and 1.5 inches of rain have fallen. The
expected rainfall rate is 2 to 3 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 heavy rain.
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...
Birmingham, Hoover, Vestavia Hills, Bessemer, Homewood, Mountain
Brook, Hueytown, Irondale, Fairfield, Pleasant Grove, Midfield,
Adamsville, Brighton, Lipscomb, Sylvan Springs, Mulga, Maytown,
Edgewater, Concord and McDonald Chapel.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
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 3355 8685 3352 8671 3347 8667 3344 8670
3343 8670 3342 8675 3340 8675 3343 8715
3342 8727 3344 8729 3346 8734 3347 8734
3349 8733 3348 8729 3350 8729 3350 8726
3351 8726 3351 8727 3355 8710
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...2-3 INCHES IN 1 HOUR
$$
86/Martin2 follow-up statements
640
WGUS54 KBMX 192321
FFWBMX
ALC073-200200-
/O.EXT.KBMX.FF.W.0037.000000T0000Z-210720T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Birmingham AL
621 PM CDT Mon Jul 19 2021
The National Weather Service in Birmingham has extended the
* Flash Flood Warning for...
Central Jefferson County in central Alabama...
* Until 900 PM CDT.
* At 621 PM CDT, the public reported thunderstorms producing heavy
rain across the warned area. Between 2 and 4 inches of rain have
fallen. The expected rainfall rate is 1 to 2 inches in 1 hour.
Additional rainfall amounts of 1 to 2 inches are possible in the
warned area. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Life threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Public reported.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Birmingham, Hoover, Vestavia Hills, Bessemer, Homewood, Mountain
Brook, Hueytown, Irondale, Fairfield, Pleasant Grove, Midfield,
Adamsville, Brighton, Lipscomb, Sylvan Springs, Mulga, Maytown,
Edgewater, Concord and McDonald Chapel.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 3355 8685 3352 8671 3347 8667 3344 8670
3343 8670 3342 8675 3340 8675 3343 8715
3342 8727 3344 8729 3346 8734 3347 8734
3349 8733 3348 8729 3350 8729 3350 8726
3351 8726 3351 8727 3355 8710
FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR
$$
86/Martin547
WGUS74 KBMX 200152
FFSBMX
Flash Flood Statement
National Weather Service Birmingham AL
852 PM CDT Mon Jul 19 2021
ALC073-200202-
/O.EXP.KBMX.FF.W.0037.000000T0000Z-210720T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Jefferson AL-
852 PM CDT Mon Jul 19 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 9 PM CDT THIS EVENING FOR
CENTRAL JEFFERSON COUNTY...
The heavy rain has ended but light rain will continue for the next
couple hours. Some minor flooding may persist in low lying areas,
and a couple creeks remain out of their banks. Please continue to
heed remaining road closures.
LAT...LON 3355 8685 3352 8671 3347 8667 3344 8670
3343 8670 3342 8675 3340 8675 3343 8715
3342 8727 3344 8729 3346 8734 3347 8734
3349 8733 3348 8729 3350 8729 3350 8726
3351 8726 3351 8727 3355 8710
$$
32/DavisThe office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 7:25 PM CDT | Areal Flood Advisory | BMX | Talladega | 2 hr |
| Jul 18, 7:30 PM CDT | Areal Flood Advisory | BMX | Jefferson | 2 hr |
| Jul 18, 9:00 PM CDT | Areal Flood Advisory | BMX | Etowah | 3 hr |
| Jul 19, 5:15 AM CDT | Special Weather Statement | BMX | Sumter | 60 min |
| Jul 19, 6:00 AM CDT | Areal Flood Advisory | BMX | Bibb, Jefferson, Shelby | 3 hr |
| Jul 19, 1:58 PM CDT | Areal Flood Advisory | BMX | Blount | 107 min |
| Jul 19, 5:56 PM CDT | Areal Flood Advisory | BMX | St. Clair, Shelby, Talladega | 2 hr |
| Jul 19, 6:27 PM CDT | Flash Flood Warning | BMX | Jefferson, Shelby | 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.