Alert archive / Mississippi / Tornado Warnings in 1991

Tornado Warning 12, NWS Jackson, MS

April 19, 1991Humphreys County, Mississippi

NWS Jackson, MS issued this tornado warning at Apr 19, 1991, 3:15 PM CDT for Humphreys County, Mississippi. It was in force for 45 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Apr 19, 1991, 3:15 PM CDT (20:15 UTC)
Expired
Apr 19, 1991, 4:00 PM CDT
In force
45 min
Issued by
NWS Jackson, MS
Area
Whole counties

County Humphreys County, MS

What was reported inside it

TimeReportWhereRemark
Apr 19, 3:32 PM CDTHail 1.25Humphreys, MS
Apr 19, 3:55 PM CDTThunderstorm Wind 0Humphreys, MS

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 8.3 hours before the alert went out and 99 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 1991-04-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 49 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 1991-04-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 8 square meters per square second.19395878Sfc1 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
49 J/kg
Mixed-layer CIN
-222 J/kg
Mixed-layer LCL
923 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
8 m²/s²
0-3 km storm-relative helicity
56 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 tornado 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 19, 12:22 PM CDT, 2 hours 53 minutes before
MSZALL-191330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
1220 PM CST FRI APR 19 1991

A COLD FRONT HAS ENTERED NORTHWEST MISSISSIPPI EARLY THIS AFTERNOON.
THUNDERSTORMS WERE BEGINNING TO DEVELOP VERY RAPIDLY ALONG THE COLD
FRONT. AT 1215 THE STRONGER STORMS WERE FROM OXFORD TO CLEVELAND
MISSISSIPPI AND WERE MOVING TO THE EAST AT 25 MPH.

THUNDERSTORMS ARE EXPECTED TO DEVELOP ALL ALONG THE COLD FRONT
THIS AFTERNOON AND INTO TONIGHT AS THE FRONT TRACKS TO THE SOUTHEAST.
SOME OF THE THUNDERSTORMS COULD BECOME SEVERE AND PRODUCE STRONG
GUSTY SURFACE WINDS...HAIL...AND POSSIBLE FLASH FLOODING OF LOW
LYING AREAS.
FLOODING ESPECIALLY IN YAZOO AND MADISON COUNTIES DURING THE PASSAGE
OF THE HEAVIER RAINS.

PERSONS IN CENTRAL MISSISSIPPI NEED TO BE WEATHER ALERT AND TAKE
PROPER ACTION WHEN THREATENING WEATHER APPROACHES. LISTEN TO NOAA
WEATHER RADIO OR THE LOCAL NEWS MEDIA FOR ANY FURTHER STATEMENTS OR
POSSIBLE WARNINGS.
Special weather statement, Apr 19, 12:23 PM CDT, 2 hours 52 minutes before
MSZALL-191330-

SPECIAL WEATHER STATEMENT...CORRECTION...
NATIONAL WEATHER SERVICE JACKSON MS
1220 PM CST FRI APR 19 1991

A COLD FRONT HAS ENTERED NORTHWEST MISSISSIPPI EARLY THIS AFTERNOON.
THUNDERSTORMS WERE BEGINNING TO DEVELOP VERY RAPIDLY ALONG THE COLD
FRONT. AT 1215 THE STRONGER STORMS WERE FROM OXFORD TO CLEVELAND
MISSISSIPPI AND WERE MOVING TO THE EAST AT 25 MPH.

THUNDERSTORMS ARE EXPECTED TO DEVELOP ALL ALONG THE COLD FRONT
THIS AFTERNOON AND INTO TONIGHT AS THE FRONT TRACKS TO THE SOUTHEAST.
SOME OF THE THUNDERSTORMS COULD BECOME SEVERE AND PRODUCE STRONG
GUSTY SURFACE WINDS...HAIL...AND POSSIBLE FLASH FLOODING OF LOW
LYING AREAS.
Special weather statement, Apr 19, 2:44 PM CDT, 31 minutes before
MSZALL-ARZ014>016-LAZ002-003-004-006-009-010-013-
ALZ004-008-013-016-192040-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE JACKSON MS
245 PM CDT FRI APR 19 1991

...SEVERE THUNDERSTORMS WATCH NO. 161 REMAINS IN EFFECT FOR MUCH OF
   NORTHERN AND CENTRAL MISSISSIPPI UNTIL 700 PM...

AT 230 PM CDT...TWO LINES OF STRONG THUNDERSTORMS WERE OCCURRING
IN MISSISSIPPI. THE STRONGEST THUNDERSTORMS WERE LOCATED FROM LAKE
PROVIDENCE LOUISIANA TO INDIANOLA TO GREENWOOD. SEVERAL STORMS IN THIS
LINE HAVE REACHED SEVERE LIMITS AND ARE CAPABLE OF PRODUCING DAMAGING
HAIL...HEAVY RAIN AND STRONG WINDS. THESE STORMS HAD DEVELOPED ALONG
A VERY SLOW MOVING COLD FRONT AND WERE MOVING TO THE SOUTHEAST AT ABOUT
20 MPH.

A SECOND LINE OF STRONG THUNDERSTORMS WAS INDICATED FROM BROOKHAVEN
AND MONTICELLO SOUTHWARD TO VERNADA LOUISIANA. THESE STORMS WERE
MOVING TO THE EAST AT 20 MPH.

PEOPLE IN THESE AREAS SHOULD BE PREPARED TO TAKE CO]VER SHOULD DANGEROUS
WEATHER APPROACH AND STAY TUNED TO NOAA WEATHER RADIO OR COMMERCIAL
RADIO OR TELEVISION FOR UPDATES.
Special weather statement, Apr 19, 3:09 PM CDT, 6 minutes before
MSZ009-192115-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MERIDIAN MS
308 PM CDT FRI APR 19 1991

...SEVERE THUNDERSTORM WATCH NUMBER 161 REMAINS IN EFFECT FOR A LARGE
PART OF NORTH AND CENTRAL MISSISSIPPI UNTIL 7 PM CDT...

AT 256 PM CDT RADAR INDICATED ONE 30 MILE WIDE AREA OF INTENSE
THUNDERSTORMS EXTENDING FROM PONTOTOC TO HOLLY BLUFF MISSISSIPPI.
ANOTHER 30 MILE WIDE AREA OF INTENSE THUNDERSTORMS WAS INDICATED
FROM GEORGETOWN TO PICAYUNE MISSISSIPPI.  THE STRONGEST THUNDERSTORMS
WERE INDICATED SOUTH OF WATER VALLEY MISSISSIPPI AND NEAR PICAYUNE
MISSISSIPPI.

BOTH AREAS WERE MOVING SOUTHEAST AT 25 MPH.

AT THE PRESENT TIME NO THUNDERSTORM ACTIVITY WAS OBSERVED IN EAST
CENTRAL MISSISSIPPI AND EXTREME WEST CENTRAL ALABAMA.

PERSONS IN AND CLOSE TO THE WATCH AREA SHOULD REMAIN ALERT FOR LATER
STATEMENTS AND POSSIBLE WARNINGS.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 18, 7:48 PM CDTSevere Thunderstorm WarningJANWilkinson42 min
Apr 19, 4:12 AM CDTSevere Thunderstorm WarningJANYazoo48 min
Apr 19, 6:15 AM CDTSevere Thunderstorm WarningJANNeshoba60 min
Apr 19, 6:48 AM CDTSevere Thunderstorm WarningJANSmith42 min
Apr 19, 7:06 AM CDTSevere Thunderstorm WarningJANNewton69 min
Apr 19, 1:11 PM CDTSevere Thunderstorm WarningJANLeflore34 min
Apr 19, 1:24 PM CDTTornado WarningJANLeflore36 min
Apr 19, 1:31 PM CDTSevere Thunderstorm WarningJANWarren44 min
Apr 19, 1:42 PM CDTSevere Thunderstorm WarningJANMarion, Walthall33 min
Apr 19, 1:56 PM CDTSevere Thunderstorm WarningJANLeflore, Sunflower49 min
Apr 19, 2:01 PM CDTSevere Thunderstorm WarningJANJefferson Davis, Lawrence44 min
Apr 19, 2:16 PM CDTSevere Thunderstorm WarningJANMarion29 min
Apr 19, 2:34 PM CDTTornado WarningJANSunflower, Washington26 min
Apr 19, 2:59 PM CDTTornado WarningJANWashington46 min
Apr 19, 3:02 PM CDTTornado WarningJANCarroll43 min
Apr 19, 3:49 PM CDTSevere Thunderstorm WarningJANHumphreys, Yazoo41 min
Apr 19, 4:04 PM CDTSevere Thunderstorm WarningJANCopiah, Hinds26 min
Apr 19, 4:21 PM CDTSevere Thunderstorm WarningJANRankin, Simpson39 min
Apr 19, 4:30 PM CDTSevere Thunderstorm WarningJANCopiah, Hinds30 min
Apr 19, 4:33 PM CDTSevere Thunderstorm WarningJANHolmes27 min
Apr 19, 4:38 PM CDTSevere Thunderstorm WarningJANYazoo37 min
Apr 19, 4:51 PM CDTTornado WarningJANHolmes38 min
Apr 19, 4:51 PM CDTTornado WarningJANMadison54 min
Apr 19, 4:54 PM CDTSevere Thunderstorm WarningJANLincoln35 min
Apr 19, 5:47 PM CDTTornado WarningJANLeake28 min
Apr 19, 5:49 PM CDTTornado WarningJANScott41 min
Apr 19, 5:58 PM CDTSevere Thunderstorm WarningJANNewton62 min
Apr 19, 6:14 PM CDTSevere Thunderstorm WarningJANLincoln31 min
Apr 19, 6:22 PM CDTSevere Thunderstorm WarningJANLauderdale68 min
Apr 19, 6:23 PM CDTSevere Thunderstorm WarningJANClaiborne52 min
Apr 19, 6:41 PM CDTSevere Thunderstorm WarningJANPike, Walthall49 min

Nearby

Tornado Warnings in Mississippi, 1991Every tornado warning in 1991Tornadoes 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.