Alert archive / Alabama / Flash Flood Warnings in 1998

Flash Flood Warning 34, NWS Mobile, AL

April 28, 1998Choctaw County, Alabama; Wayne County, Mississippi

NWS Mobile, AL issued this flash flood warning at Apr 28, 1998, 9:46 AM CDT for Choctaw County, Alabama; Wayne County, Mississippi. It was in force for 109 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 28, 1998, 9:46 AM CDT (14:46 UTC)
Expired: Apr 28, 1998, 11:35 AM CDT
In force: 109 min
Issued by: NWS Mobile, AL
Area: Whole counties

Counties Choctaw County, AL, Wayne County, MS

The radar

The Mobile radar (KMOB), 130 km from the middle of the area, began a volume at 14:47 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

Jackson, MS (KJAN), launched 12:00Z, 2.8 hours before the alert went out and 160 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1096 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 104 m²/s²
0-3 km storm-relative helicity: 300 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 
TTAA00 KMOB 281445
FFWMOB
ALC023-MSC153-281635-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
946 AM CDT TUE APR 28 1998

THE NATIONAL WEATHER SERVICE IN MOBILE HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  CHOCTAW COUNTY IN SOUTHWESTERN ALABAMA
  WAYNE COUNTY IN SOUTHEASTERN MISSISSIPPI

* UNTIL 1135 AM CDT

* AT 945 AM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR AT MOBILE
  INDICATED THUNDERSTORMS WITH VERY HEAVY RAIN ACROSS WAYNE COUNTY...
  WHICH ARE MOVING DRIFTING EAST.

* THIS AREA OF THUNDERSTORMS WILL DRIFT ACROSS WAYNE AND
  CHOCTAW COUNTIES.  THIS WILL CONTINUE TO CAUSE WIDESPREAD
  FLOODING OF SMALL STREAMS AND POOR DRAINAGE AREAS IN THESE TWO
  COUNTIES.  AN ADDITIONAL ONE TO TWO INCHES CAN BE EXPECTED IN THESE
  COUNTIES THROUGH 1130 AM.


MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO
CROSS BRIDGES... DIPS... OR LOW WATER CROSSINGS IF WATER COVERS
THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM... EVEN A SMALL
ONE... ON FOOT. TO ESCAPE RISING WATER MOVE TO HIGHER GROUND. DO
NOT DRIVE AROUND BARRICADES.

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 28, 7:58 AM CDT	Flash Flood Warning	MOB	Choctaw	2 hr
Apr 28, 8:08 AM CDT	Severe Thunderstorm Warning	MOB	Mobile	32 min
Apr 28, 9:58 AM CDT	Severe Thunderstorm Warning	MOB	Baldwin	62 min
Apr 28, 6:21 AM CDT	Flash Flood Warning	MOB	Perry, Stone	119 min
Apr 28, 6:37 AM CDT	Severe Thunderstorm Warning	MOB	Perry	33 min
Apr 28, 6:55 AM CDT	Severe Thunderstorm Warning	MOB	George	35 min
Apr 28, 7:47 AM CDT	Flash Flood Warning	MOB	Wayne	118 min
Apr 28, 8:27 AM CDT	Flash Flood Warning	MOB	Perry, Stone	3 hr

Nearby

Flash Flood Warnings in Alabama, 1998 Flash Flood Warnings in Mississippi, 1998 Every flash flood warning in 1998

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.