Alert archive / Mississippi / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 394, NWS Jackson, MS

July 4, 1997Washington County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Jul 4, 1997, 8:33 PM CDT for Washington County, Mississippi. It was in force for 42 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 4, 1997, 8:33 PM CDT (01:33 UTC)
Expired: Jul 4, 1997, 9:15 PM CDT
In force: 42 min
Issued by: NWS Jackson, MS
Area: Whole counties

County Washington County, MS

What was reported inside it

Time	Report	Where	Remark
Jul 4, 9:00 PM CDT	Thunderstorm Wind 65	Hollandale, 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 watch it was issued in

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

Issued	Product	Office	Lasted
Jul 4, 6:00 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 1.6 hours before the alert went out and 134 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: 2606 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 1508 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: -22 m²/s²
0-3 km storm-relative helicity: -23 m²/s²
Significant tornado parameter: -0.2
Supercell composite: -2.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KJAN 050134 RRA
SVRJAN
MSC151-050215-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON MS
833 PM CDT FRI JUL 4 1997
 
THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  915 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTHWEST MISSISSIPPI
 
   ...WASHINGTON COUNTY
 
AT 832 PM...JACKSON DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 14
MILES WEST-SOUTHWEST OF WAYSIDE. THIS STORM WAS MOVING EAST AT 30 MPH.
THIS STORM WILL CROSS THE MISSISSIPPI RIVER BY 840 PM AND WILL AFFECT
HOLLANDALE BY 855 PM. WINDS IN EXCESS OF 70 MPH CAN BE EXPECTED 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.
<
 
75

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, Jul 4, 7:06 PM CDT, 1 hour 27 minutes before

MSZ037-032-039-033-029-038-050115-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
706 PM CDT FRI JUL 4 1997

...SEVERE THUNDERSTORM WATCH NUMBER 565 IN EFFECT UNTIL 8 PM CDT FOR
NORTHEASTERN MISSISSIPPI HAS BEEN CANCELLED...

DURING THE PAST COUPLE OF HOURS...THUNDERSTORM ACTIVITY OVER NORTHEAST
MISSISSIPPI HAS BEEN ON THE DECREASE.  THEREFORE...THE SEVERE THUNDERSTO
WATCH FOR WEBSTER...CHOCTAW...OKTIBBEHA...ATTALA...WINSTON...AND NOXUBEE
COUNTIES HAS BEEN CANCELLED.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 9:05 PM CDT	Severe Thunderstorm Warning	JAN	Issaquena, Sharkey	40 min
Jul 4, 9:05 PM CDT	Severe Thunderstorm Warning	JAN	Humphreys	40 min
Jul 4, 9:16 PM CDT	Severe Thunderstorm Warning	JAN	Sunflower	29 min
Jul 4, 9:55 PM CDT	Severe Thunderstorm Warning	JAN	Warren, Yazoo	35 min
Jul 4, 10:04 PM CDT	Severe Thunderstorm Warning	JAN	Hinds, Madison	41 min
Jul 4, 11:17 PM CDT	Severe Thunderstorm Warning	JAN	Attala	28 min
Jul 4, 11:33 PM CDT	Severe Thunderstorm Warning	JAN	Leake, Neshoba	42 min
Jul 4, 11:54 PM CDT	Severe Thunderstorm Warning	JAN	Winston	51 min
Jul 5, 12:09 AM CDT	Severe Thunderstorm Warning	JAN	Noxubee	51 min
Jul 5, 4:27 PM CDT	Severe Thunderstorm Warning	JAN	Lamar	33 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.