Alert archive / Alabama / Flash Flood Warnings in 2012
Flash Flood Warning 32, NWS Huntsville, AL
NWS Huntsville, AL issued this flash flood warning at Aug 4, 2012, 4:19 PM CDT for Limestone County, Morgan County, Alabama. It was in force for 3 hr. 3 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, 2012, 4:19 PM CDT (21:19 UTC)
- Expired
- Aug 4, 2012, 7:15 PM CDT
- In force
- 3 hr
- Issued by
- NWS Huntsville, AL
- Area
- Storm-based polygon
- Emergency
- Flash flood emergency
- Flood severity
- None
Counties Limestone County, AL, Morgan County, AL
The radar
The Northeast Alabama radar (KHTX), 81 km from the middle of the area, began a volume at 21:18 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, 4:47 PM CDT | FLASH FLOOD | Decatur, AL | SPOTTER REPORTED ROADS FLOODED IN DECATUR...INCLUDING SPRING AVENUE. |
| Aug 4, 5:20 PM CDT | FLASH FLOOD | Decatur, AL | COUNTY EMA REPORTED WATER ON THE FOLLOWING ROADS IN DECATUR...BELTLINE AT GLENN...PORTIONS OF CENTRAL PARKWAY...CEDAR STREET SOUTHWEST...MARKET STREET SOUTHEAST...CANAL STREET SOUTHEAST...CHURCH STREET SOUTHEAST...AND THE INTERSECTION OF DANVILLE ROAD AND PRES |
| Aug 4, 6:15 PM CDT | FLASH FLOOD | Decatur, AL | ON LEE STREET IN FRONT OF THE COURTHOUSE...THERE IS AN ESTIMATED THREE FEET OF WATER ON THE ROAD...WITH WATER NEARLY TO THE BASE OF STRANDED CAR WINDOWS. ADDITIONAL FLOODING IS LOCATED ON MARKET STREET NEAR RIVER BRIDGE. ALL OTHER ROADS THAT WERE CLOSED/IMPASS |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 9.3 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
- 2994 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 630 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- 89 m²/s²
- 0-3 km storm-relative helicity
- 88 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
988 WGUS54 KHUN 042119 FFWHUN ALC083-103-050015- /O.NEW.KHUN.FF.W.0032.120804T2119Z-120805T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE HUNTSVILLE AL 419 PM CDT SAT AUG 4 2012 THE NATIONAL WEATHER SERVICE IN HUNTSVILLE HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHWESTERN MORGAN COUNTY IN NORTH CENTRAL ALABAMA... SOUTHEASTERN LIMESTONE COUNTY IN NORTH CENTRAL ALABAMA... * UNTIL 715 PM CDT * AT 416 PM CDT...PUBLIC REPORTS ALONG WITH DOPPLER RADAR INDICATED HEAVY RAIN FROM THUNDERSTORMS IN DOWNTOWN DECATUR...AS WELL AS SOUTHWEST LIMESTONE COUNTY. AROUND TWO INCHES OF RAIN HAS ALREADY FALLEN. THIS MUCH RAINFALL IN URBAN AREAS MAY QUICKLY LEAD TO FLASH FLOODING. * SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... DECATUR...ATHENS...FLINT CITY AND MOORESVILLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. && LAT...LON 3482 8682 3447 8692 3450 8708 3484 8697 $$
4 follow-up statements
518 WGUS74 KHUN 042129 FFSHUN FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE HUNTSVILLE AL 429 PM CDT SAT AUG 4 2012 ALC083-103-050015- /O.CON.KHUN.FF.W.0032.000000T0000Z-120805T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MORGAN AL-LIMESTONE AL- 429 PM CDT SAT AUG 4 2012 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 PM CDT FOR NORTHWESTERN MORGAN AND SOUTHEASTERN LIMESTONE COUNTIES... ...THIS IS A FLASH FLOOD EMERGENCY FOR DECATUR... AT 428 PM CDT...EMERGENCY MANAGEMENT REPORTED FLASH FLOODING IN DOWNTOWN DECATUR. FLASH FLOODING IS ALREADY OCCURRING. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... DECATUR...ATHENS...FLINT CITY AND MOORESVILLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. && LAT...LON 3482 8682 3447 8692 3450 8708 3484 8697 $$
612 WGUS74 KHUN 042152 FFSHUN FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE HUNTSVILLE AL 452 PM CDT SAT AUG 4 2012 ALC083-103-050015- /O.CON.KHUN.FF.W.0032.000000T0000Z-120805T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MORGAN AL-LIMESTONE AL- 452 PM CDT SAT AUG 4 2012 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 PM CDT FOR NORTHWESTERN MORGAN AND SOUTHEASTERN LIMESTONE COUNTIES... ...THIS IS A FLASH FLOOD EMERGENCY FOR DECATUR... AT 451 PM CDT...TRAINED WEATHER SPOTTERS REPORTED FLASH FLOODING IN DOWNTOWN DECATUR. FLASH FLOODING IS ALREADY OCCURRING...AND SEVERAL ROADS IN DOWNTOWN DECATUR ARE BEING CLOSED DOWN DUE TO WATER COVERING THE ROADS. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... DECATUR...ATHENS...FLINT CITY AND MOORESVILLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. && LAT...LON 3482 8682 3447 8692 3450 8708 3484 8697 $$
790 WGUS74 KHUN 042231 FFSHUN FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE HUNTSVILLE AL 531 PM CDT SAT AUG 4 2012 ALC083-103-050015- /O.CON.KHUN.FF.W.0032.000000T0000Z-120805T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MORGAN AL-LIMESTONE AL- 531 PM CDT SAT AUG 4 2012 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 PM CDT FOR NORTHWESTERN MORGAN AND SOUTHEASTERN LIMESTONE COUNTIES... ...THIS IS A FLASH FLOOD EMERGENCY FOR DECATUR... AT 525 PM CDT...EMERGENCY MANAGEMENT REPORTED FLASH FLOODING IN DOWNTOWN DECATUR...ESPECIALLY ON THE SOUTHWEST AND SOUTHEAST SIDES. WATER IS COVERING SEVERAL ROADWAYS...INCLUDING BUT NOT LIMITED TO...THE BELTLINE AT GLENN...PORTIONS OF CENTRAL PARKWAY...CEDAR STREET SOUTHWEST...MARKET STREET SOUTHEAST...CANAL STREET SOUTHEAST...AND CHURCH STREET SOUTHEAST. DO NOT DRIVE INTO THESE AREAS. OTHER LOCATIONS THAT MAY EXPERIENCE FLASH FLOODING INCLUDE...ATHENS...FLINT CITY AND MOORESVILLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. && LAT...LON 3482 8682 3447 8692 3450 8708 3484 8697 $$
339 WGUS74 KHUN 042318 FFSHUN FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE HUNTSVILLE AL 618 PM CDT SAT AUG 4 2012 ALC083-103-050015- /O.CON.KHUN.FF.W.0032.000000T0000Z-120805T0015Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MORGAN AL-LIMESTONE AL- 618 PM CDT SAT AUG 4 2012 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 PM CDT FOR NORTHWESTERN MORGAN AND SOUTHEASTERN LIMESTONE COUNTIES... AT 617 PM CDT...EMERGENCY MANAGEMENT REPORTED FLASH FLOODING IN DOWNTOWN DECATUR. LEE STREET NEAR THE COURTHOUSE REMAINS IMPASSABLE DUE TO HIGH WATER. ADDITIONAL FLOODING IS LOCATED ON MARKET STREET NEAR RIVER BRIDGE. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... DECATUR...ATHENS...FLINT CITY AND MOORESVILLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. && LAT...LON 3482 8682 3447 8692 3450 8708 3484 8697 $$
The office that day
Everything else NWS Huntsville, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 1:46 PM CDT | Special Weather Statement | HUN | Lauderdale | 44 min |
| Aug 4, 2:10 PM CDT | Special Weather Statement | HUN | Madison | 50 min |
| Aug 4, 2:19 PM CDT | Special Weather Statement | HUN | Lauderdale | 41 min |
| Aug 4, 2:35 PM CDT | Flash Flood Warning | HUN | Lauderdale | 3 hr |
| Aug 4, 3:13 PM CDT | Special Weather Statement | HUN | Lauderdale | 32 min |
| Aug 4, 3:34 PM CDT | Special Weather Statement | HUN | Colbert | 26 min |
| Aug 4, 4:07 PM CDT | Special Weather Statement | HUN | Limestone | 38 min |
| Aug 4, 4:34 PM CDT | Special Weather Statement | HUN | Lawrence | 26 min |
| Aug 4, 4:59 PM CDT | Special Weather Statement | HUN | Morgan | 31 min |
Nearby
Flash Flood Warnings in Alabama, 2012Every flash flood warning in 2012
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.