Alert archive / Missouri / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 6, NWS Springfield, MO

May 12, 1990Howell County, Missouri

NWS Springfield, MO issued this severe thunderstorm warning at May 12, 1990, 5:48 PM CDT for Howell County, Missouri. It was in force for 42 min.

The area

The counties it named.

The facts

Issued
May 12, 1990, 5:48 PM CDT (22:48 UTC)
Expired
May 12, 1990, 6:30 PM CDT
In force
42 min
Issued by
NWS Springfield, MO
Area
Whole counties

County Howell County, MO

The radar

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

The nearest sounding before it

Springfield, MO (KUMN), launched 12:00Z, 10.8 hours before the alert went out and 171 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-pSkew-T log-p diagram, Springfield, MO at 12:00Z on 1990-05-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 241 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 12:00Z on 1990-05-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 269 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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 122248
SVRSGF
MOC091-122330-

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

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 630 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTY

   IN THE SOUTH CENTRAL PART OF MISSOURI
      HOWELL

AT RADAR INDICATED A SEVERE THUNDERSTORM 15 MILES WEST OF WEST
PLAINS MISSOURI. THIS STORM WAS MOVING TO THE EAST 25 MILES AN HOUR
.
THIS STORM WILL MOVE ACROSS THE CITY OF WEST PLAINS BY 6 PM CDT.

THESE STORMS CAN AND OFTEN DO PRODUCE SMALL TORNADOES.

THIS IS A DANGEROUS STORM...PREPARE FOR DAMAGING WINDS...LARGE HAIL
AND DEADLY LIGHTNING.

 WB

The office that day

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

IssuedProductOfficeCountiesLasted
May 12, 4:04 PM CDTSevere Thunderstorm WarningSGFLaclede, Webster, Wright41 min
May 12, 4:51 PM CDTTornado WarningSGFDouglas, Wright54 min
May 12, 4:51 PM CDTTornado WarningSGFOzark54 min
May 12, 6:32 PM CDTSevere Thunderstorm WarningSGFOregon43 min

Nearby

Severe Thunderstorm Warnings in Missouri, 1990Every 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; the sounding from the Mesonet's radiosonde archive.