Alert archive / Mississippi / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 369, NWS Jackson, MS

June 20, 1997Choctaw County, Oktibbeha County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Jun 20, 1997, 10:42 PM CDT for Choctaw County, Oktibbeha County, Mississippi. It was in force for 48 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: Jun 20, 1997, 10:42 PM CDT (03:42 UTC)
Expired: Jun 20, 1997, 11:30 PM CDT
In force: 48 min
Issued by: NWS Jackson, MS
Area: Whole counties

Counties Choctaw County, MS, Oktibbeha County, MS

The radar

The Columbus AFB radar (KGWX), 89 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
Jun 20, 11:00 PM CDT	Thunderstorm Wind	Osborn, MS	Several trees 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, 3.7 hours before the alert went out and 152 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: 2015 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 1512 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: 34 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.

661 
WUUS1 KJAN 210343 RRA
SVRJAN
MSC019-105-210430-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON MS
1042 PM CDT FRI JUN 20 1997
 
THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1130 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN CENTRAL MISSISSIPPI
 
   ...EASTERN CHOCTAW COUNTY
 
IN NORTH CENTRAL MISSISSIPPI
 
   ...WESTERN OKTIBBEHA COUNTY
 
AT 1041 PM CDT DOPPLER RADAR IN JACKSON INDICATED A SEVERE THUNDERSTORM
JUST SOUTHEAST OF REFORM MOVING SOUTHEAST NEAR 10 MPH. THIS STORM WILL
MOVE INTO THE STURGIS AREA BY 1115 PM. DAMAGING WINDS ARE LIKELY WITH
THIS STORM.
 
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.
<
71

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 7:03 PM CDT	Severe Thunderstorm Warning	JAN	Lauderdale	57 min
Jun 20, 7:15 PM CDT	Tornado Warning	JAN	Clarke	45 min
Jun 20, 8:01 PM CDT	Severe Thunderstorm Warning	JAN	Noxubee	44 min
Jun 20, 8:09 PM CDT	Severe Thunderstorm Warning	JAN	Kemper	51 min
Jun 20, 8:23 PM CDT	Severe Thunderstorm Warning	JAN	Lauderdale	52 min
Jun 20, 9:07 PM CDT	Flash Flood Warning	JAN	Kemper, Lauderdale	3 hr
Jun 20, 9:52 PM CDT	Severe Thunderstorm Warning	JAN	Oktibbeha	53 min
Jun 20, 10:17 PM CDT	Severe Thunderstorm Warning	JAN	Choctaw	28 min
Jun 20, 11:37 PM CDT	Flash Flood Warning	JAN	Choctaw, Oktibbeha, Winston	2 hr
Jun 21, 1:45 AM CDT	Flash Flood Warning	JAN	Choctaw	3 hr
Jun 21, 6:16 PM CDT	Severe Thunderstorm Warning	JAN	Kemper	44 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.