Alert archive / Mississippi / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 77, NWS New Orleans, LA

April 5, 1997Harrison County, Mississippi

NWS New Orleans, LA issued this severe thunderstorm warning at Apr 5, 1997, 11:51 AM CST for Harrison County, Mississippi. It was in force for 54 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 5, 1997, 11:51 AM CST (17:51 UTC)
Expired: Apr 5, 1997, 12:45 PM CST
In force: 54 min
Issued by: NWS New Orleans, LA
Area: Whole counties

County Harrison County, MS

The radar

The Mobile radar (KMOB), 86 km from the middle of the area, began a volume at 17:55 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
Apr 5, 9:00 AM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 5.9 hours before the alert went out and 62 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: 356 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 503 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 411 m²/s²
0-3 km storm-relative helicity: 442 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 4.2

Open this sounding in Storm Lab

The text

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

596 
WUUS1 KNEW 051751 RRA
SVRNEW
MSC047-051845-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1151 AM CST SAT APR 5 1997
 
THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1245 PM CST
FOR RESIDENTS IN THE FOLLOWING LOCATION...
 
IN SOUTH MISSISSIPPI
 
   ...HARRISON COUNTY
 
AND THE ADJACENT COASTAL WATERS
 
AT 1150 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF
STRONG TO SEVERE THUNDERSTORMS WAS OVER WESTERN HARRISON COUNTY MOVING
EAST AT 30 MPH. THIS LINE OF THUNDERSTORMS HAS PRODUCED STRONG GUSTY
WINDS THAT DOWNED TREES NEAR STENNIS SPACE CENTER.
 
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.  REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 5, 8:08 AM CST	Severe Thunderstorm Warning	LIX	Amite	37 min
Apr 5, 8:46 AM CST	Severe Thunderstorm Warning	LIX	Amite, Pike	44 min
Apr 5, 9:42 AM CST	Severe Thunderstorm Warning	LIX	Pike, Walthall	48 min
Apr 5, 10:20 AM CST	Severe Thunderstorm Warning	LIX	Pearl River	40 min
Apr 5, 12:18 PM CST	Severe Thunderstorm Warning	LIX	Jackson	42 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.