Alert archive / Mississippi / Flash Flood Warnings in 1991

Flash Flood Warning 45, NWS Jackson, MS

April 29, 1991Attala County, Mississippi

NWS Jackson, MS issued this flash flood warning at Apr 29, 1991, 4:43 AM CDT for Attala County, Mississippi. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Apr 29, 1991, 4:43 AM CDT (09:43 UTC)
Expired
Apr 29, 1991, 7:45 AM CDT
In force
3 hr
Issued by
NWS Jackson, MS
Area
Whole counties

County Attala County, MS

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 9.7 hours before the alert went out and 97 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 00:00Z on 1991-04-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 515 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 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 00:00Z on 1991-04-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 134 square meters per square second.193958Sfc1 km3 km6 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
515 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
606 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
134 m²/s²
0-3 km storm-relative helicity
111 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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, Apr 28, 11:04 PM CDT, 5 hours 39 minutes before
MSZ009-012-ALZ008-013-290600-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MERIDIAN MS
1102 PM CDT SUN APR 28 1991

...TORNADO WATCH NUMBER 233 WHICH INCLUDES PARTS OF EAST CENTRAL
MISSISSIPPI REMAINS IN EFFECT UNTIL 3 AM CDT...

...SEVERE THUNDERSTORM WATCH NUMBER 234 WHICH INCLUDES PORTIONS OF
NORTH AND CENTRAL MISSISSIPPI AND SUMTER COUNTY IN WEST CENTRAL
ALABAMA REMAINS IN EFFECT UNTIL 5 AM CDT...

AT 1051 PM CDT RADAR INDICATED A LARGE AREA OF RAIN WITH EMBEDDED
STRONG THUNDERSTORMS WEST OF A LINE FROM PRENTISS TO EDINBURG
MISSISSIPPI TO HAMILTON ALABAMA.  THE STRONGEST THUNDERSTORM WAS
INDICATED NORTH OF VICKSBURG MISSISSIPPI.

THE AREA WAS MOVING NORTHEAST AT 35 MPH.
 =
PERSONS IN AND CLOSE TO THE WATCH AREA SHOULD REMAIN ALERT FOR LATER
STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, Apr 29, 1:11 AM CDT, 3 hours 32 minutes before
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Special weather statement, Apr 29, 4:07 AM CDT, 36 minutes before
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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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      <p id="message2">
        Please try again in a few minutes.
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The office that day

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

IssuedProductOfficeCountiesLasted
Apr 28, 7:07 PM CDTSevere Thunderstorm WarningJANAmite, Franklin38 min
Apr 28, 7:26 PM CDTSevere Thunderstorm WarningJANWilkinson49 min
Apr 28, 7:47 PM CDTSevere Thunderstorm WarningJANAmite28 min
Apr 28, 8:20 PM CDTSevere Thunderstorm WarningJANFranklin40 min
Apr 28, 9:13 PM CDTFlash Flood WarningJANHumphreys, Sharkey, Sunflower, Washington2 hr
Apr 28, 9:13 PM CDTFlash Flood WarningJANIssaquena2 hr
Apr 28, 9:13 PM CDTFlash Flood WarningJANBolivar2 hr
Apr 28, 9:13 PM CDTSevere Thunderstorm WarningJANBolivar, Humphreys, Sunflower, Washington2 hr
Apr 28, 9:13 PM CDTSevere Thunderstorm WarningJANIssaquena, Sharkey2 hr
Apr 28, 10:04 PM CDTFlash Flood WarningJANYazoo116 min
Apr 28, 10:04 PM CDTFlash Flood WarningJANLeflore, Tallahatchie116 min
Apr 28, 10:04 PM CDTSevere Thunderstorm WarningJANLeflore, Tallahatchie116 min
Apr 28, 10:04 PM CDTSevere Thunderstorm WarningJANYazoo116 min
Apr 28, 10:15 PM CDTSevere Thunderstorm WarningJANWarren60 min
Apr 28, 10:30 PM CDTFlash Flood WarningJANCarroll, Holmes2 hr
Apr 28, 10:30 PM CDTSevere Thunderstorm WarningJANCarroll, Holmes2 hr
Apr 28, 10:49 PM CDTTornado WarningJANYazoo26 min
Apr 28, 11:15 PM CDTFlash Flood WarningJANBolivar, Humphreys, Sunflower, Washington3 hr
Apr 28, 11:15 PM CDTFlash Flood WarningJANIssaquena, Sharkey3 hr
Apr 28, 11:45 PM CDTFlash Flood WarningJANWarren2 hr
Apr 28, 11:45 PM CDTSevere Thunderstorm WarningJANWarren2 hr
Apr 29, 12:02 AM CDTFlash Flood WarningJANWarren, Yazoo3 hr
Apr 29, 1:37 AM CDTFlash Flood WarningJANCarroll, Holmes, Leflore83 min
Apr 29, 1:48 AM CDTSevere Thunderstorm WarningJANAdams, Claiborne, Jefferson57 min
Apr 29, 1:48 AM CDTSevere Thunderstorm WarningJANWarren57 min
Apr 29, 1:59 AM CDTSevere Thunderstorm WarningJANHumphreys, Sharkey, Yazoo61 min
Apr 29, 2:16 AM CDTSevere Thunderstorm WarningJANCarroll, Holmes, Leflore44 min
Apr 29, 2:26 AM CDTFlash Flood WarningJANBolivar, Humphreys, Issaquena, Sharkey, Sunflower, Washington4 hr
Apr 29, 2:59 AM CDTSevere Thunderstorm WarningJANHinds, Madison61 min
Apr 29, 3:07 AM CDTFlash Flood WarningJANCarroll, Holmes, Leflore, Yazoo3 hr
Apr 29, 3:05 PM CDTFlash Flood WarningJANCovington, Jefferson Davis115 min
Apr 29, 3:05 PM CDTFlash Flood WarningJANLawrence, Marion, Walthall115 min
Apr 29, 4:57 PM CDTFlash Flood WarningJANJefferson Davis, Lawrence, Marion, Simpson, Walthall4 hr
Apr 29, 4:57 PM CDTFlash Flood WarningJANCovington, Forrest, Lamar4 hr
Apr 29, 4:57 PM CDTFlash Flood WarningJANSmith4 hr
Apr 29, 4:57 PM CDTFlash Flood WarningJANPike4 hr
Apr 29, 5:36 PM CDTFlash Flood WarningJANNeshoba3 hr

Nearby

Flash Flood Warnings in Mississippi, 1991Every flash flood warning in 1991

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.