Alert archive / Alabama / Flash Flood Warnings in 2023
Flash Flood Warning 21, NWS Huntsville, AL
NWS Huntsville, AL issued this flash flood warning at Aug 4, 2023, 3:48 AM CDT for Morgan County, Alabama. It was in force for 3 hr. 2 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
- Aug 4, 2023, 3:48 AM CDT (08:48 UTC)
- Expired
- Aug 4, 2023, 6:30 AM CDT
- In force
- 3 hr
- Issued by
- NWS Huntsville, AL
- Area
- Storm-based polygon
- Flood severity
- None
County Morgan County, AL
The radar
The Northeast Alabama radar (KHTX), 93 km from the middle of the area, began a volume at 08:51 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 4, 4:30 AM CDT | FLOOD | 2 N Decatur, AL | Lee St blocked due to flooding. |
| Aug 4, 5:36 AM CDT | FLOOD | 1 E Decatur, AL | Flooding on Country Club Rd just past Fairway Dr. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Birmingham, AL (KBMX), launched 00:00Z, 8.8 hours before the alert went out and 163 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
- 109 J/kg
- Mixed-layer CIN
- -268 J/kg
- Mixed-layer LCL
- 1450 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 131 m²/s²
- 0-3 km storm-relative helicity
- 163 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
119
WGUS54 KHUN 040848
FFWHUN
ALC103-041130-
/O.NEW.KHUN.FF.W.0021.230804T0848Z-230804T1130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Huntsville AL
348 AM CDT Fri Aug 4 2023
The National Weather Service in Huntsville has issued a
* Flash Flood Warning for...
Northwestern Morgan County in north central Alabama...
* Until 630 AM CDT.
* At 348 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across northwest Morgan County. Between 1 and 2 inches
of rain have fallen. Additional rainfall amounts of 1 to 2 inches
are possible. 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...
Decatur and Trinity.
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.
&&
LAT...LON 3465 8704 3460 8694 3459 8693 3453 8696
3457 8710 3468 8710 3468 8709 3467 8709
3466 8707 3465 8705
FLASH FLOOD...RADAR INDICATED
$$
RSB1 follow-up statement
261
WGUS74 KHUN 041005
FFSHUN
Flash Flood Statement
National Weather Service Huntsville AL
505 AM CDT Fri Aug 4 2023
ALC103-041130-
/O.CON.KHUN.FF.W.0021.000000T0000Z-230804T1130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Morgan AL-
505 AM CDT Fri Aug 4 2023
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 AM CDT THIS
MORNING FOR NORTHWESTERN MORGAN COUNTY...
At 505 AM CDT, Doppler radar indicated thunderstorms producing heavy
rain across northwest Alabama. Between 1 and 4 inches of rain have
fallen. Additional rainfall amounts of 1 to 2 inches are possible in
the warned area. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Decatur and Trinity.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3465 8704 3460 8694 3459 8693 3453 8696
3457 8710 3468 8710 3468 8709 3467 8709
3466 8707 3465 8705
FLASH FLOOD...RADAR INDICATED
$$
RSBThe office that day
Everything else NWS Huntsville, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 3:15 AM CDT | Special Weather Statement | HUN | Colbert | 45 min |
| Aug 4, 4:26 AM CDT | Flash Flood Warning | HUN | Lauderdale, Limestone | 2 hr |
| Aug 4, 4:33 AM CDT | Flash Flood Warning | HUN | Cullman | 4 hr |
| Aug 4, 6:31 AM CDT | Areal Flood Warning | HUN | Lauderdale, Limestone, Morgan | 3 hr |
| Aug 4, 8:19 AM CDT | Areal Flood Warning | HUN | Cullman | 101 min |
Nearby
Flash Flood Warnings in Alabama, 2023Every flash flood warning in 2023
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.