Alert archive / Missouri / Tornado Warnings in 1990

Tornado Warning 4, NWS Springfield, MO

May 20, 1990Christian County, Greene County, Webster County, Missouri

NWS Springfield, MO issued this tornado warning at May 20, 1990, 10:36 PM CDT for Christian County, Greene County, Webster County, Missouri. It was in force for 54 min. 3 reports 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: May 20, 1990, 10:36 PM CDT (03:36 UTC)
Expired: May 20, 1990, 11:30 PM CDT
In force: 54 min
Issued by: NWS Springfield, MO
Area: Whole counties

Counties Christian County, MO, Greene County, MO, Webster County, MO

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

Time	Report	Where
May 20, 10:40 PM CDT	Hail 0.75	Webster, MO
May 20, 10:50 PM CDT	Tornado F0	Webster, MO
May 20, 11:06 PM CDT	Tornado F0	Christian, 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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Springfield, MO (KUMN), launched 00:00Z, 3.6 hours before the alert went out and 66 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: 2299 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 1348 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 196 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 7.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSGF 210336
TORSGF
MOC225-043-077-210430-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
TORNADO WARNING 
NATIONAL WEATHER SERVICE SPRINGFIELD MO
1036 PM CDT SUN MAY 20 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING 
EFFECTIVE UNTIL 1130 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE SOUTHWEST PART OF MISSOURI
      WESTERN WEBSTER...CHRISTIAN...EASTERN GREENE

A TORNADO WAS REPORTED BY THE PUBLIC NEAR LOGAN ROGERVILLE AT 1035P
M CDT
THE STORM WAS MOVING TO THE EAST AT 20 MILE AN HOUR.

IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE TO BE IS IN
A BASEMENT.  IF NO BASEMENT IS AVAIABE...FIND SHELTER IN AN INTERIOR
ROOM ON THE LOWEST FLOOR.

THIS IS A DANGEROUS SITUATION...IF YOU ARE IN THE PATH OF THIS
TORNADO MOVE TO A SHELTER BELOW GROUND...OR TO SMALL INTERIOR
ROOM ON THE LOWEST FLOOR.

 BAREIS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 20, 8:27 PM CDT	Severe Thunderstorm Warning	SGF	Dade, Jasper, Lawrence, Newton	63 min
May 20, 9:22 PM CDT	Severe Thunderstorm Warning	SGF	Jasper, Lawrence	68 min
May 20, 9:22 PM CDT	Severe Thunderstorm Warning	SGF	Christian, Greene	68 min
May 20, 10:02 PM CDT	Severe Thunderstorm Warning	SGF	Stone	58 min
May 20, 10:02 PM CDT	Severe Thunderstorm Warning	SGF	Webster	58 min
May 20, 10:02 PM CDT	Severe Thunderstorm Warning	SGF	Newton	58 min
May 20, 10:59 PM CDT	Tornado Warning	SGF	Stone	46 min
May 20, 11:11 PM CDT	Severe Thunderstorm Warning	SGF	Barry, Newton	64 min
May 20, 11:44 PM CDT	Severe Thunderstorm Warning	SGF	Texas, Wright	61 min
May 21, 12:20 AM CDT	Severe Thunderstorm Warning	SGF	Barry, McDonald, Newton, Stone	55 min
May 21, 12:20 AM CDT	Severe Thunderstorm Warning	SGF	Jasper	55 min
May 21, 12:45 AM CDT	Severe Thunderstorm Warning	SGF	Shannon, Texas	60 min

Nearby

Tornado Warnings in Missouri, 1990 Every tornado warning in 1990 Tornadoes in 1990

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.