Alert archive / Alabama / Flash Flood Warnings in 2002

Flash Flood Warning 26, NWS Birmingham, AL

July 12, 2002Jefferson County, Alabama

NWS Birmingham, AL issued this flash flood warning at Jul 12, 2002, 10:17 PM CDT for Jefferson County, Alabama. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 12, 2002, 10:17 PM CDT (03:17 UTC)
Expired
Jul 13, 2002, 1:15 AM CDT
In force
3 hr
Issued by
NWS Birmingham, AL
Area
Whole counties

County Jefferson County, AL

The radar

The Birmingham radar (KBMX), 44 km from the middle of the area, began a volume at 03:16 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 00:00Z, 3.3 hours before the alert went out and 43 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.

Skew-T log-pSkew-T log-p diagram, Birmingham, AL at 00:00Z on 2002-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 481 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 00:00Z on 2002-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -23 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
481 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
660 m above ground
0-6 km bulk shear
2 kt
0-1 km storm-relative helicity
-23 m²/s²
0-3 km storm-relative helicity
11 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS54 KBMX 130317
FFWBHM
ALC073-130615-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1015 PM CDT FRI JUL 12 2002

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  JEFFERSON COUNTY IN ALABAMA

* UNTIL 115 AM CDT

* THE FLOODING POTENTIAL REMAINS HIGHEST BETWEEN INTERSTATE 59 AND 
INTERSTATE 65...INCLUDING BIRMINGHAM...TARRANT...PINSON...KETONA... 
AND CENTERPOINT. AT 1015 PM CDT...NATIONAL WEATHER SERVICE DOPPLER 
RADAR INDICATES MOST OF THE HEAVY RAIN HAS PUSHED EAST AND OUT OF 
JEFFERSON COUNTY. BUT ADDITIONAL THUNDERSTORMS WERE DEVELOPING IN 
WESTERN JEFFERSON COUNTY...GENERALLY FROM NORTH JOHNS TO WEST 
JEFFFERSON. THESE STORMS WILL PUSH EASTWARD AND EFFECT THE FLOODED 
AREAS BETWEEN 11 PM AND 1 AM. AN ADDITIONAL HALF TO ONE INCH COULD 
OCCUR. MANY LOCAL STREAMS...CREEKS...AND ROADWAYS REMAIN FLOODED. 

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED ACT
QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY
IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE. IF YOUR VEHICLE STALLS...ABANDON IT IMMEDIATELY AND SEEK
HIGHER GROUND.
1 follow-up statement
000 
WGUS74 KBMX 130415
FFSBHM
ALC073-130430-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1107 PM CDT FRI JUL 12 2002

...A FLASH FLOOD WARNING CONTINUES FOR JEFFERSON COUNTY UNTIL 115 
AM...

AT 1107 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
MODERATE RAINFALL CONTINUING ACROSS PARTS OF EASTERN JEFFERSON 
COUNTY...AND AN AREA OF HEAVY RAIN FROM NEAR NORTH JOHNS...TO NEAR 
SYLVAN SPRINGS. THE RAIN AREAS WERE MOVING EAST NORTHEAST AROUND 20 
MPH. ADDITIONAL RAINFALL AMOUNTS UP TO A HALF INCH ARE POSSIBLE EAST 
OF INTERSTATE 65...WITH ISOLATED ONE TO TWO INCH AMOUNTS IN WESTERN 
PARTS OF THE COUNTY.

DOPPLER RADAR INDICATES FROM ONE TO FIVE INCHES OF RAINFALL BETWEEN 
INTERSTATE 65 AND INTERSTATE 59 SINCE THIS AFTERNOON...INCLUDING 
BIRMINGHAM...TARRANT...PINSON...CENTER POINT...HUFFMAN...AND 
ROEBUCK. MANY AREA STREAMS...CREEKS...AND ROADS REMAIN FLOODED. 

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED ACT
QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY
IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

The office that day

Everything else NWS Birmingham, AL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 12, 7:28 PM CDTFlash Flood WarningBMXJefferson3 hr
Jul 12, 7:56 PM CDTSevere Thunderstorm WarningBMXAutauga34 min

Nearby

Flash Flood Warnings in Alabama, 2002Every flash flood warning in 2002

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.