Alert archive / Mississippi / Flash Flood Warnings in 1989

Flash Flood Warning 21, NWS Jackson, MS

July 1, 1989Bolivar County, Sunflower County, Washington County, Mississippi

NWS Jackson, MS issued this flash flood warning at Jul 1, 1989, 7:46 AM CDT for Bolivar County, Sunflower County, Washington County, Mississippi. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Jul 1, 1989, 7:46 AM CDT (12:46 UTC)
Expired
Jul 1, 1989, 11:00 AM CDT
In force
3 hr
Issued by
NWS Jackson, MS
Area
Whole counties

Counties Bolivar County, MS, Sunflower County, MS, Washington 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

Jackson, MS (KJAN), launched 12:00Z, 0.8 hours before the alert went out and 154 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, Jackson, MS at 12:00Z on 1989-07-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 552 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jackson, MS at 12:00Z on 1989-07-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 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
552 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
593 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
70 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 KJAN 011247
FFWJAN
MSC011-133-151-011600-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSON MS
746 AM CDT SAT JUL 1 1989
 
THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 1100 AM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN NORTHWEST MISSISSIPPI
          ...BOLIVAR...SUNFLOWER...WASHINGTON
 
RADAR AND SATELLITE OBSERVATIONS ARE SHOWING A LARGE AREA OF MODERATE
TO HEAVY RAIN EXTENEDING FROM THE DELTA TO NORTH-CENTRAL LOUISIANA.
THIS RAIN AREA IS MOVING INTO A REGION OF THE STATE THAT WAS SATURATED
BY RAIN LAST NIGHT. IT QUITE POSSIBLE THAT AN ADDITIONAL TWO TO THREE
INCHES OF RAIN COULD FALL IN THE WARNING AREA. THIS WILL CAUSE A
SERIOUS FLASH FLOOD PROBLEM.
 
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT.  DO NOT STAY IN AREAS SUBJECT TO FLASH FLOODING WHEN
WATER BEGINS RISING.  MOVE TO HIGHER GROUND.
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The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 1, 10:56 AM CDTFlash Flood WarningJANBolivar, Sunflower, Washington3 hr

Nearby

Flash Flood Warnings in Mississippi, 1989Every flash flood warning in 1989

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.