Alert archive / Missouri / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 5, NWS Springfield, MO

May 12, 1990Laclede County, Webster County, Wright County, Missouri

NWS Springfield, MO issued this severe thunderstorm warning at May 12, 1990, 4:04 PM CDT for Laclede County, Webster County, Wright County, Missouri. It was in force for 41 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 12, 1990, 4:04 PM CDT (21:04 UTC)
Expired: May 12, 1990, 4:45 PM CDT
In force: 41 min
Issued by: NWS Springfield, MO
Area: Whole counties

Counties Laclede County, MO, Webster County, MO, Wright 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 12, 4:09 PM CDT	Hail 0.75	Webster, MO
May 12, 4:30 PM CDT	Hail 0.75	Laclede, MO
May 12, 4:40 PM CDT	Tornado F2	Wright, 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 12:00Z, 9.1 hours before the alert went out and 117 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: 241 J/kg
Mixed-layer CIN: -147 J/kg
Mixed-layer LCL: 614 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: 269 m²/s²
0-3 km storm-relative helicity: 296 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSGF 122104
SVRSGF
MOC105-225-229-122145-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE SPRINGFIELD MO
404 PM CDT SAT MAY 12 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 445 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE SOUTHWEST PART OF MISSOURI
      LACLEDE...NORTHEAST WEBSTER...WRIGHT

AT4 PM CDT RADAR INDICATED SEVERE THUNDERSTORMS 50 MILES NORTHEAST
AND 40 MILES NORTHEAST OF SPRINGFIELD MISSOURI MOVING TO THE EAST
AT 25 MILES AN HOUR.

THE CITIES OF LEBANON AND NIANGUA WILL BE AFFECTED DURING THE NEXT
30 MINUTES.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING...AND VERY HEAVY RAIN.  MOVE TO AN INTERIOR ROOM
ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS.

 WB

The office that day

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

Issued	Product	Office	Counties	Lasted
May 12, 4:51 PM CDT	Tornado Warning	SGF	Douglas, Wright	54 min
May 12, 4:51 PM CDT	Tornado Warning	SGF	Ozark	54 min
May 12, 5:48 PM CDT	Severe Thunderstorm Warning	SGF	Howell	42 min
May 12, 6:32 PM CDT	Severe Thunderstorm Warning	SGF	Oregon	43 min

Nearby

Severe Thunderstorm Warnings in Missouri, 1990 Every severe thunderstorm warning 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.