Alert archive / Mississippi / Flash Flood Warnings in 1986

Flash Flood Warning 2, NWS Jackson, MS

July 21, 1986Hinds County, Rankin County, Mississippi

NWS Jackson, MS issued this flash flood warning at Jul 21, 1986, 4:31 PM CDT for Hinds County, Rankin County, Mississippi. It was in force for 59 min.

The area

The counties it named.

The facts

Issued
Jul 21, 1986, 4:31 PM CDT (21:31 UTC)
Expired
Jul 21, 1986, 5:30 PM CDT
In force
59 min
Issued by
NWS Jackson, MS
Area
Whole counties

Counties Hinds County, MS, Rankin 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, 9.5 hours before the alert went out and 12 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 1986-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3118 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, Jackson, MS at 12:00Z on 1986-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 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
3118 J/kg
Mixed-layer CIN
-57 J/kg
Mixed-layer LCL
862 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
44 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 
TTAAOO KJAN 212131
FFWJAN
MSC049-121-212230-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSON MS
431 PM CDT MON JUL 21 1986
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL  530 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES:
 
IN CENTRAL MISSISSIPPI
          ..EASTERN HINDS..WESTERN RANKIN

 
 
HEAVY RAIN HAS BEEN FALLING IN THE JACKSON METROPOLITAN AREA DURING
THE PAST HALF HOUR.  THE USUAL LOW-LYING AREAS ARE BEGINNING TO FLOOD
AND WILL CONTINUE TO GET WORSE DURING THE RUSH HOUR.
 
 
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY.  THE WATXER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY.  VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY.  MOVE TO HIGHER GROUND.

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jul 21, 1:20 PM CDT, 3 hours 11 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MERIDIAN MS
115 PM CDT MON JUL 21 1986

THUNDERSTORMS DEVELOPING RAPIDLY THROUGH EAST CENTRAL MISSISSIPPI AND
EXTREME WEST CENTRAL ALABAMA.

AT 110 PM WEATHER RADAR INDICATED NUMEROUS THUNDERSTORMS, SOME QUITE
HEAVY OVER EAST CENTRAL MISSISSIPPI AND EXTREME WEST CENTRAL ALABAMA.
THE HEAVIEST WERE LOCATED IN GREENE COUNTY ALABAMA..KEMPER AND NESHOBA
COUNTIES IN MISSISSIPPI.  THE THUNDERSTORMS WERE MOVING SLOWLY SOUTH.

BRIEF HEAVY RAIN..STRONG GUSTY WINDS..DANGEROUS LIGHTENING AND
POSSIBLY SOME HAIL IS LIKELY WITH THE HEAVIEST THUNDERSTORMS.

PERSONS IN EAST CENTRAL MISSISSIPPI AND EXTREME WEST CENTRAL ALABAMA
SHOULD BE ALERT FOR jHEAVY THUNDERSTORMS FOR THE NEXT FEW HOURS.
Special weather statement, Jul 21, 2:06 PM CDT, 2 hours 25 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
210 PM CDT SUN JUL 20 1986

...HEAVY THUNDERSTORMS DEVELOPING RAPIDLY OVER THE SOUTHERN TWO THIRDS
OF MISSISSIPPI...

AT 2 PM..NUMEROUS THUNDERSTORMS WERE CLUSTERED OVER EASTCENTRAL..AND
SOUTHWESTERN SECTIONS OF MISSISSIPPI.

ALTHOUGH THESE THUNDERSTORMS ARE DEVELOPING RAPIDLY..THEY ARE MOVING
VERY SLOWLY.  THIS SHOULD RESULT IN VERY HEAVY RAINFALL IN A FEW
LOCATIONS.  SOME HAIL IS ALSO POSSIBLE FROM SOME OF THE STRONGER
THUNDERSTORMS.

VISIBILITY MAY BE DRASTICALLY REDUCED FOR A SHORT TIME..DUE TO THE
INTENSITY OF RAINFALL.
Special weather statement, Jul 21, 2:41 PM CDT, 1 hour 50 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
235 PM CDT SUN JUL 20 1986

VERY HEAVY THUNDERSTORMS CONTINUE TO DEVELOP EXPLOSIVELY OVER PORTIONS
OF CENTRAL AND SOUTH MISSISSIPPI.

AT 230 PM VERY HEAVY THUNDERSTORMS WERE SCATTERED OVER MUCH OF THE
SOUTHERN TWO THIRDS OF THE STATE. MOST OF THE ACTIVITY WAS CENTERED
OVER EAST CENTRAL AND SOUTH WEST MISSISSIPPI.

MANY OF THESE THUNDERSTORMS ARE CAPABLE OF PRODUCING HAIL...STRONG GUSTY
WINDS AND BRIEF HEAVY RAIN AS THEY MOVE TO THE SOUTH AT AROUND 10 MPH.

PERSONS IN CENTRAL AND SOUTH MISSISSIPPI SHOULD BE ALERT FOR THREATENING
WEATHER...AND BE PREPARED TO TAKE ACTION IF A WARNING IS ISSUED.
Special weather statement, Jul 21, 3:08 PM CDT, 1 hour 23 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE JACKSON MS
300 PM CDT MON JUL 21 1986

AT 300 PM...VERY HEAVY THUNDERSTORMS CONTINUED TO DEVELOP OVER CENTRAL
AND SOUTHWEST MISSISSIPPI. THE STRONGEST STORM WAS LOCATED 10 MILES
SOUTH OF JACKSON.

ALL OF THESE THUNDERSTORMS ARE MOVING SLOWLY SOUTH AND WILL LIKELY
PRODUCE HEAVY DOWNPOURS OF RAIN.

PERSONS IN CENTRAL AND SOUTH MISSISSIPPI SHOULD EXPECT FREQUENT
LIGHTNING...STRONG WIND AND HAIL WITH THESE THUNDERSTORMS.

ANOTHER STATEMENT WILL BE ISSUED AROUND 330 PM.
Special weather statement, Jul 21, 3:33 PM CDT, 58 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE JACKSON MS
330 PM CDT MON JUL 21 1986

AT 330 PM...NUMEROUS VERY HEAVY THUNDERSTORMS WERE OCCURRING OVER
CENTRAL AND SOUTH MISSISSIPPI.

THE STRONGEST THUNDERSTORMS WERE LOCATED 5 MILES EAST OF MACON...
15 MILES EAST OF MERIDIAN AND 30 MILES WEST OF MCCOMB.

ALL OF THE THUNDERSTORMS IN MISSISSIPPI ARE MOVING SLOWLY SOUTH AND
WILL LIKELY PRODUCE HEAVY DOWNPOURS OF RA$IN.

PERSONS IN CENTRAL AND SOUTH MISSISSIPPI SHOULD EXPECT FREQUENT
LIGHTNING...STRONG WIND AND HAIL WITH THESE THUNDERSTORMS.

ANOTHER STATEMENT WILL BE ISSUED AROUND 4 PM.
Special weather statement, Jul 21, 4:28 PM CDT, 3 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE JACKSON MS
425 PM CDT MON JUL 21 1986

AT 425 PM...NUMEROUS VERY HEAVY THUNDERSTORMS CONTINUED OVER CENTRAL
AND SOUTH MISSISSIPPI.

THE STRONGEST THUNDERSTORMS WERE LOCATED IN AND AROUND THE JACKSON
AREA.

SINCE ALL THE THUNDERSTORMS WERE MOVING VERY SLOWLY TO THE SOUTH,
HEAVY RAINS ARE LIKELY WITH THESE THUNDERSTORMS. OVER 3/4 OF AN
INCH OF RAIN HAD FALLEN IN DOWNTOWN JACKSON IN A 20 MINUTE SPAN.
SINCE THE RAINS WILL CONTINUE FOR SOME TIME, STREET FLOODING WILL
BE A MAJOR CONCERN FOR PEOPLE TO THINK ABOUT AS THE RUSH HOUR NEARS.

PEOPLE SHOULD NOT DRIVE IN THIS WEATHER UNLESS THEY HAVE TO. IF
YOU ARE DRIVING, DO NOT ATQTEMPT TO DRIVE THROUGH RUNNING WATER OR
WATER OF UNKNOWN DEPTH. UNDERPASSES COULD BE DEADLY.
ANOTHER STATEMENT WILL BE ISSUED AROUND 430 PM.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 21, 1:55 PM CDTSevere Thunderstorm WarningJANSmith50 min

Nearby

Flash Flood Warnings in Mississippi, 1986Every flash flood warning in 1986

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.