Alert archive / Mississippi / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 418, NWS Jackson, MS

July 9, 1997Grenada County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Jul 9, 1997, 10:46 PM CDT for Grenada County, Mississippi. It was in force for 44 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: Jul 9, 1997, 10:46 PM CDT (03:46 UTC)
Expired: Jul 9, 1997, 11:30 PM CDT
In force: 44 min
Issued by: NWS Jackson, MS
Area: Whole counties

County Grenada County, MS

The radar

The Columbus AFB radar (KGWX), 137 km from the middle of the area, began a volume at 03:46 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Jul 9, 11:00 PM CDT	Thunderstorm Wind	Holcomb, MS	Several trees and numerous 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

Little Rock, AR (KLZK), launched 00:00Z, 3.8 hours before the alert went out and 119 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: 36 J/kg
Mixed-layer CIN: -205 J/kg
Mixed-layer LCL: 1536 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 92 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KJAN 100347 RRA
SVRJAN
MSC043-100430-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON MS
1046 PM CDT WED JUL 9 1997
 
THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1130 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTH CENTRAL MISSISSIPPI
 
   ...GRENADA COUNTY
 
AT 1045 PM NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A DEVELOPING
SEVERE THUNDERSTORM ENTERING NORTHWEST GRENADA COUNTY. THE STORM WAS
MOVING SOUTH SOUTHEAST AT 15 MPH...AND WILL MOVE NEAR HOLCOMB BY 1105
PM.
 
THIS STORM WILL PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH AND HAIL UP
TO THE SIZE OF QUARTERS.
 
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.
<
64

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

Local storm report, Jul 9, 7:50 PM CDT, 2 hours 56 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MISSISSIPPI
750 PM CDT WED JUL 09 1997

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0530 PM    WESSON                    MS   WIND DAMAGE
07/09/97   COPIAH                         TREES DOWN ON SHEDS AND
                                          VEHICLES IN WESSON AND
                                          BEAUREGARD AREAS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 9, 10:57 PM CDT	Tornado Warning	JAN	Grenada	33 min
Jul 9, 11:18 PM CDT	Severe Thunderstorm Warning	JAN	Carroll	42 min
Jul 10, 10:51 AM CDT	Severe Thunderstorm Warning	JAN	Lauderdale	29 min
Jul 10, 4:31 PM CDT	Severe Thunderstorm Warning	JAN	Scott	29 min
Jul 10, 4:54 PM CDT	Severe Thunderstorm Warning	JAN	Lamar	51 min
Jul 10, 5:14 PM CDT	Severe Thunderstorm Warning	JAN	Rankin	46 min
Jul 10, 5:52 PM CDT	Severe Thunderstorm Warning	JAN	Lawrence	53 min
Jul 10, 6:02 PM CDT	Severe Thunderstorm Warning	JAN	Rankin	43 min
Jul 10, 6:20 PM CDT	Flash Flood Warning	JAN	Montgomery	40 min
Jul 10, 6:20 PM CDT	Severe Thunderstorm Warning	JAN	Montgomery	40 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; radar from the NEXRAD Level II archive.