Alert archive / Missouri / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 13, NWS Springfield, MO

February 20, 1997Howell County, Texas County, Missouri

NWS Springfield, MO issued this severe thunderstorm warning at Feb 20, 1997, 11:30 PM CST for Howell County, Texas County, Missouri. It was in force for 60 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: Feb 20, 1997, 11:30 PM CST (05:30 UTC)
Expired: Feb 21, 1997, 12:30 AM CST
In force: 60 min
Issued by: NWS Springfield, MO
Area: Whole counties

Counties Howell County, MO, Texas County, MO

The radar

The Springfield radar (KSGF), 132 km from the middle of the area, began a volume at 05:33 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
Feb 20, 11:45 PM CST	Thunderstorm Wind 70	West Plains, MO

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

Springfield, MO (KSGF), launched 00:00Z, 5.5 hours before the alert went out and 167 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: 267 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 593 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 221 m²/s²
0-3 km storm-relative helicity: 270 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSGF 210531 RRA
SVRSGF
MOC091-215-210630-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SPRINGFIELD MO
1130 PM CST THU FEB 20 1997
 
THE NATIONAL WEATHER SERVICE IN SPRINGFIELD HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1230 AM CST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTH CENTRAL MISSOURI
 
   ...HOWELL COUNTY...TEXAS COUNTY
 
AT 1130 PM CST RADAR IN SPRINGFIELD INDICATED A BAND OF SEVERE
THUNDERSTORMS FROM CABOOL TO JUST WEST OF WEST PLAINS. MOVEMENT WAS EAST
AT NEAR 30 MPH. WINDS IN EXCESS OF 60 MPH CAN BE EXPECTED WITH THIS BAND
OF STORMS AS IT MOVES THROUGH THE CABOOL...WEST PLAINS AND MOUNTAIN VIEW
AREAS.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO ARzEAS WHERE WATER COVERS THE ROAD.
 
MS/GH

The office that day

Everything else NWS Springfield, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 20, 9:07 PM CST	Severe Thunderstorm Warning	SGF	Barry, McDonald	53 min
Feb 20, 9:14 PM CST	Flash Flood Warning	SGF	Barton, Jasper, Newton	4 hr
Feb 20, 9:14 PM CST	Flash Flood Warning	SGF	Barry, McDonald	4 hr
Feb 20, 9:46 PM CST	Severe Thunderstorm Warning	SGF	Stone	44 min
Feb 20, 9:55 PM CST	Severe Thunderstorm Warning	SGF	Barry, Lawrence	65 min
Feb 20, 10:10 PM CST	Severe Thunderstorm Warning	SGF	Dade, Greene	65 min
Feb 20, 10:10 PM CST	Severe Thunderstorm Warning	SGF	Christian	65 min
Feb 20, 10:29 PM CST	Severe Thunderstorm Warning	SGF	Ozark	46 min
Feb 20, 10:40 PM CST	Severe Thunderstorm Warning	SGF	Dallas, Douglas, Webster	65 min
Feb 20, 10:40 PM CST	Severe Thunderstorm Warning	SGF	Polk	65 min

Nearby

Severe Thunderstorm Warnings in Missouri, 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.