Alert archive / Mississippi / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 259, NWS Mobile, AL

November 1, 1997Stone County, Mississippi

NWS Mobile, AL issued this severe thunderstorm warning at Nov 1, 1997, 2:34 PM CST for Stone County, Mississippi. It was in force for 56 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: Nov 1, 1997, 2:34 PM CST (20:34 UTC)
Expired: Nov 1, 1997, 3:30 PM CST
In force: 56 min
Issued by: NWS Mobile, AL
Area: Whole counties

County Stone County, MS

The radar

The Mobile radar (KMOB), 85 km from the middle of the area, began a volume at 20:35 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
Nov 1, 3:05 PM CST	Hail 0.88	Perkinston, MS	Nickel size hail was reported near the college in Perkinston.

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
Nov 1, 1:45 PM CST	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 8.6 hours before the alert went out and 82 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: 2011 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 499 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 151 m²/s²
0-3 km storm-relative helicity: 162 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 6.9

Open this sounding in Storm Lab

The text

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

120 
WUUS1 KMOB 012036 RRA
SVRMOB
MSC131-012130-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
234 PM CST SAT NOV 1 1997
 
THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  330 PM CST
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHEAST MISSISSIPPI
 
   ...STONE COUNTY
 
AT 233 PM CST MOBILE DOPPLER RADAR SHOWED A SEVERE THUNDERSTORM
PRODUCING LARGE HAIL NEAR POPULARVILLE. THIS STORM WILL MOVE EAST
SOUTHEAST INTO STONE COUNTY AROUND 245 PM....IN THE GENERAL DIRECTION OF
MCHENRY.
 
THIS IS A DANGEROUS STORM.  IF YOU ARE IN ITS PATH YOU SHOULD
PREPARE FOR DAMAGING WIND IN EXCESS OF 55 MPH...LARGE HAIL...AND
DEADLY LIGHTNING.  PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS.

The office that day

Everything else NWS Mobile, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 1, 12:40 PM CST	Severe Thunderstorm Warning	MOB	Wayne	2 hr
Nov 1, 2:42 PM CST	Severe Thunderstorm Warning	MOB	Greene	2 hr
Nov 1, 2:42 PM CST	Severe Thunderstorm Warning	MOB	Perry	2 hr
Nov 1, 2:56 PM CST	Tornado Warning	MOB	Greene	64 min
Nov 1, 3:14 PM CST	Severe Thunderstorm Warning	MOB	George	61 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.