Alert archive / Mississippi / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 134, NWS Jackson, MS

April 29, 2002Choctaw County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Apr 29, 2002, 1:56 AM CDT for Choctaw County, Mississippi. It was in force for 34 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 29, 2002, 1:56 AM CDT (06:56 UTC)
Expired: Apr 29, 2002, 2:30 AM CDT
In force: 34 min
Issued by: NWS Jackson, MS
Area: Counties, with a storm outline in the text

County Choctaw County, MS

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 29, 12:00 AM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 6.9 hours before the alert went out and 132 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: 1827 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 1282 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 97 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.6

Open this sounding in Storm Lab

The text

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

993 
WUUS54 KJAN 290656
SVRJAN
MSC019-290730-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON MS
156 AM CDT MON APR 29 2002

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CHOCTAW COUNTY IN CENTRAL MISSISSIPPI

* UNTIL 230 AM CDT

* AT 156 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 10 MILES SOUTHWEST OF ACKERMAN...OR ABOUT 16
  MILES NORTHWEST OF LOUISVILLE...MOVING EAST AT 40 MPH.

* THE SEVERE THUNDERSTORM WILL...
  BE NEAR ACKERMAN AT 200 AM CDT

HAIL...DAMAGING WINDS AND TORRENTIAL RAIN ARE EXPECTED WITH THIS
STORM. TAKE COVER IN A SUBSTANTIAL SHELTER WHILE THE STORM PASSES.

HAIL TO THE SIZE OF NICKELS IS LIKELY WITH THIS STORM.

LAT...LON 3339 8941 3332 8930 3313 8930 3315 8923
          3343 8911

What forecasters said that day

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

NWS Jackson, MS wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 29, 12:28 AM CDT, 1 hour 28 minutes earlier.

Area forecast discussion, Apr 29, 12:28 AM CDT, 1 hour 28 minutes before

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE JACKSON MS
1228 AM CDT MON APR 29 2002

AT MIDNIGHT...SUBJECTIVE SURFACE ANALYSIS HAS FRONT AROUND THE U.S.
HIGHWAY 82 CORRIDOR.  SHOWERS AND THUNDERSTORMS HAVE DEVELOPED ALONG
THE FRONT LATE THIS EVENING...AND SEVERE THUNDERSTORM WATCH NUMBER
180 HAS BEEN ISSUED BY SPC UNTIL 400 AM.  WITH THIS IN MIND...A
QUICK UPDATE WILL BE COMING TO INCLUDE MENTION OF THE WATCH (AND
SEVERE) ACROSS THE AFFECTED COUNTIES.  IM ALSO PLANNING ON REMOVING
THE MENTION OF PRECIP FROM GRENADA COUNTY.  UPDATE OUT IN A FEW
MINUTES.

FCSTID = 10

.JAN...
AR...NONE.
LA...NONE.
MS...NONE.

BUTTS

In the hours before

Special weather statement, Apr 29, 1:21 AM CDT, 35 minutes before

ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074-
291200-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSON MS
121 AM CDT MON APR 29 2002

...THUNDERSTORMS...
SEVERE THUNDERSTORMS WILL BE SCATTERED OVER PARTS OF NORTH AND
CENTRAL MISSISSIPPI...ALONG AND NORTH OF A LINE FROM FITLER TO
CANTON TO DEKALB AND SOUTH OF A LINE FROM CLEVELAND TO WINONA TO
COLUMBUS. LARGE HAIL AND DAMAGING WIND GUSTS TO 70 MPH WILL BE
THE PRIMARY THREAT WITH SEVERE THUNDERSTORMS THROUGH THE EARLY
MORNING.

A COLD FRONT EXTENDING FROM SOUTHEAST ARKANSAS TO NORTHEAST
MISSISSIPPI WILL DROP SLOWLY INTO CENTRAL MISSISSIPPI BY SUNRISE.
THE BAND OF STORMS WILL MOVE VERY SLOLWY SOUTHWARD SO THE
STRONGER STORMS ARE EXPECTED TO REMAIN NORTH OF A LINE FROM
VICKSBURG TO JACKSON TO MERIDIAN THROUGH
6 AM. THE CHANCE FOR THUNDERSTORMS WILL INCREASE OVER CENTRAL AND
SOUTH MISSISSIPPI AND NORTHEAST LOUISIANA AFTER SUNRISE MONDAY.

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL
MAY BE REQUIRED ACROSS SOUTHEAST ARKANSAS...NORTH AND CENTRAL
MISSISSIPPI AND NORTHEAST LOUISIANA BY SUNRISE.

FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT
WWW.SRH.NOAA.GOV/JAN. THIS INCLUDES THE GRAPHICAL HAZARDOUS
WEATHER OUTLOOK.

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 28, 11:54 PM CDT	Severe Thunderstorm Warning	JAN	Washington	36 min
Apr 29, 12:21 AM CDT	Severe Thunderstorm Warning	JAN	Humphreys, Sunflower	24 min
Apr 29, 12:30 AM CDT	Severe Thunderstorm Warning	JAN	Holmes, Leflore	45 min
Apr 29, 12:47 AM CDT	Severe Thunderstorm Warning	JAN	Sunflower	23 min
Apr 29, 1:06 AM CDT	Severe Thunderstorm Warning	JAN	Carroll	24 min
Apr 29, 1:38 PM CDT	Severe Thunderstorm Warning	JAN	Smith	37 min
Apr 29, 2:11 PM CDT	Severe Thunderstorm Warning	JAN	Jasper	34 min
Apr 29, 2:38 PM CDT	Severe Thunderstorm Warning	JAN	Jones	37 min
Apr 29, 2:43 PM CDT	Severe Thunderstorm Warning	JAN	Clarke	47 min
Apr 29, 3:25 PM CDT	Severe Thunderstorm Warning	JAN	Jones	50 min
Apr 29, 3:32 PM CDT	Severe Thunderstorm Warning	JAN	Clarke	13 min
Apr 29, 6:20 PM CDT	Severe Thunderstorm Warning	JAN	Bolivar	25 min
Apr 29, 6:52 PM CDT	Severe Thunderstorm Warning	JAN	Covington	38 min
Apr 29, 6:58 PM CDT	Severe Thunderstorm Warning	JAN	Bolivar, Washington	32 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 2002 Every severe thunderstorm warning in 2002

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.