Alert archive / Mississippi / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 261, NWS Jackson, MS

May 9, 1997Leflore County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at May 9, 1997, 5:43 AM CDT for Leflore County, Mississippi. It was in force for 47 min. 1 report 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: May 9, 1997, 5:43 AM CDT (10:43 UTC)
Expired: May 9, 1997, 6:30 AM CDT
In force: 47 min
Issued by: NWS Jackson, MS
Area: Whole counties

County Leflore County, MS

What was reported inside it

Time	Report	Where	Remark
May 9, 5:55 AM CDT	Thunderstorm Wind	Greenwood, MS	Several trees and large limbs were blown down.

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.

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 10.7 hours before the alert went out and 138 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: 105 J/kg
Mixed-layer CIN: -205 J/kg
Mixed-layer LCL: 1566 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KJAN 091046 RRA
SVRJAN
MSC083-091130-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON MS
543 AM CDT FRI MAY 9 1997
 
THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  630 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTH CENTRAL MISSISSIPPI
 
   ...LEFLORE COUNTY
 
AT 542 AM DOPPLER RADAR INDICATED A CLUSTER OF SEVERE THUNDERSTORMS
ENTERING WESTERN LEFLORE COUNTY. THE STORMS WERE MOVING EAST AT 35 MPH
AND WILL MOVE NEAR GREENWOOD BY 605 AM.
 
THESE STORMS HAVE A HISTORY OF PRODUCING DAMAGING WINDS. IN ADDITION...
HAIL UP TO DIME SIZE IS POSSIBLE.
 
SEVERE THUNDERSTORMS PRODUCE WIND IN EXCESS OF 55 MPH...LARGE
HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.  MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.
<
69

The office that day

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

Issued	Product	Office	Counties	Lasted
May 9, 4:18 AM CDT	Severe Thunderstorm Warning	JAN	Bolivar	57 min
May 9, 5:09 AM CDT	Severe Thunderstorm Warning	JAN	Sunflower	51 min
May 9, 5:59 AM CDT	Severe Thunderstorm Warning	JAN	Carroll	46 min
May 9, 6:26 AM CDT	Severe Thunderstorm Warning	JAN	Montgomery	49 min
May 9, 6:55 AM CDT	Severe Thunderstorm Warning	JAN	Choctaw, Webster	50 min
May 9, 7:26 AM CDT	Severe Thunderstorm Warning	JAN	Oktibbeha	49 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 1997 Every severe thunderstorm warning in 1997

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.