Alert archive / Mississippi / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 40, NWS Jackson, MS

March 29, 1989Warren County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Mar 29, 1989, 7:53 AM CST for Warren County, Mississippi. It was in force for 37 min.

The area

The counties it named.

The facts

Issued: Mar 29, 1989, 7:53 AM CST (13:53 UTC)
Expired: Mar 29, 1989, 8:30 AM CST
In force: 37 min
Issued by: NWS Jackson, MS
Area: Whole counties

County Warren 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, 1.9 hours before the alert went out and 73 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: 248 J/kg
Mixed-layer CIN: -60 J/kg
Mixed-layer LCL: 885 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 151 m²/s²
0-3 km storm-relative helicity: 163 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.7

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 severe thunderstorm 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, Mar 29, 5:41 AM CST, 2 hours 12 minutes before

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Special weather statement, Mar 29, 6:39 AM CST, 1 hour 14 minutes before

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Special weather statement, Mar 29, 7:45 AM CST, 8 minutes before

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE JACKSON MS
730 AM CST WED MAR 29 1989

...FLASH FLOOD WATCH CONTINUES NORTHWEST OF VICKSBURG TO KOSCIUSKO TO
               TUPELO LINE TODAY AND TONIGHT...

AT 730 AM...A LINE OF THUNDERSTORMS WAS EMBEDDED IN A LARGE AREA OF
RAIN THAT COVERED THE WESTERN THIRD OF MISSISSIPPI AND EXTENDED INTO
ARKANSAS AND LOUISIANA.

THE LEADING EDGE OF THE RAIN AREA AND THUNDERSTORMS WAS FROM GREENWOOD
TO YAZOO CITY TO UTICA TO CENTREVILLE AND SPREADING EAST AT 35 MPH.
THE STRONGEST THUNDERSTORMS WERE IN A 15 MILE WIDE LINE FROM GREENVILLE
TO VICKSBURG TO JUST EAST OF NATCHEZ AND SOUTHWARD. THIS LINE CONTAINS
TORRENTIAL RAINS...FREQUENT LIGHTNING AND GUSTY WINDS.

A LITTLE WEAKENING OF THE STRONGER STORMS WAS NOTED IN THE PAST HOUR.
PRESENT MOVEMENTS WOULD BRING THE STRONGER THUNDERSTORMS ACROSS THE
GREENWOOD...JACKSON...BROOKHAVEN AND MCCOMB AREAS FROM 9AM-930AM CST.

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 29, 8:09 AM CST	Severe Thunderstorm Warning	JAN	Hinds, Yazoo	51 min
Mar 29, 8:48 AM CST	Severe Thunderstorm Warning	JAN	Madison	42 min
Mar 29, 9:03 AM CST	Severe Thunderstorm Warning	JAN	Hinds, Rankin	27 min
Mar 29, 11:02 AM CST	Severe Thunderstorm Warning	JAN	Kemper, Lauderdale	58 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 1989 Every severe thunderstorm 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.