Alert archive / Mississippi / Flash Flood Warnings in 1990

Flash Flood Warning 29, NWS Mobile, AL

March 16, 1990Jackson County, Mississippi

NWS Mobile, AL issued this flash flood warning at Mar 16, 1990, 12:50 PM CST for Jackson County, Mississippi. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued: Mar 16, 1990, 12:50 PM CST (18:50 UTC)
Expired: Mar 16, 1990, 4:43 PM CST
In force: 4 hr
Issued by: NWS Mobile, AL
Area: Whole counties

County Jackson County, MS

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 6.8 hours before the alert went out and 106 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: 642 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: -34 m²/s²
0-3 km storm-relative helicity: 82 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMOB 161852
FFWMOB
ALC025-035-053-099-129-MSC059-170045-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
1250 PM CST FRI MAR 16 1990
 
THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  645 PM CST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHWEST ALABAMA
 
   ...CLARKE COUNTY...CONECUH COUNTY...ESCAMBIA COUNTY...MONROE COUNTY
   ...WASHINGTON COUNTY
 
IN SOUTHEAST MISSISSIPPI
 
   ...JACKSON COUNTY
 
AT 1245 PM AREAS OF RAIN AND LINES OF THUNDERSTORMS WERE INDICATED BY
RADAR CONTINUING TO MOVE NORTHEAST OUT OF THE GULF ACROSS SOUTHEAST
MISSISSIPPI AND SOUTHWEST ALABAMA.
 
THESE THUNDERSTORMS ARE EXPECTED TO CONTINUE OFF AND ON THIS AFTERNOON
WITH ADDITIONAL HEAVY RAINFALL AMOUNTS OF AT LEAST 2 TO 4 INCHES.
 
SATELLITE AND RADAR RETURNS INDICATES THAT FROM 3 TO 6 INCHES OF
RAINFALL HAVE OCCURRED OVER THE INLAND ALABAMA COUNTIES SINCE 6AM.
THEY ADDITONAL RAINFALL EXPECTED WILL AGGRAVATE THE FLOODING SITUATION
WITH SMALL STREAMS GOING OVER THEIR BANKS.  ROADS AND STREETS NOT
ALREADY FLOODED ARE EXPECTED TO FLOOD DURING THE AFTERNOON.
 
IN JACKSON COUNTY MISSISSIPPI THE RAIN HAS SLACKENED BUT MORE
THUNDERSTORMS LOOM IN THE GULF TO THE SOUTHWEST AND ARE MOVING
NORTHEAST.  MANY ROADS REMAIN FLOODED IN JACKSON COUNTY AND NOT MUCH
IMPROVEMENT IS EXPECTED THIS AFTERNOON.
 
RESIDENTS IN AREAS SUBJECT TO FLOODING SHOULD MOVE TO HIGHER GROUND
IMMEDIATELY.  IF DRIVING IS NOT ABSOLUTELY NECESSARY...YOU SHOULD
REMAIN WHERE YOU ARE.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT.  MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.  DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS
THE ROADWAY.  NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL
ONE...ON FOOT.  TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 16, 2:56 AM CST	Flash Flood Warning	MOB	George, Jackson	3 hr
Mar 16, 10:34 AM CST	Severe Thunderstorm Warning	MOB	Jackson	41 min

Nearby

Flash Flood Warnings in Mississippi, 1990 Every flash flood warning in 1990

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.