Alert archive / Missouri / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 39, NWS Springfield, MO

June 21, 1987Stone County, Missouri

NWS Springfield, MO issued this severe thunderstorm warning at Jun 21, 1987, 3:40 PM CDT for Stone County, Missouri. It was in force for 50 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
Jun 21, 1987, 3:40 PM CDT (20:40 UTC)
Expired
Jun 21, 1987, 4:30 PM CDT
In force
50 min
Issued by
NWS Springfield, MO
Area
Whole counties

County Stone 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

TimeReportWhereRemark
Jun 21, 4:15 PM CDTTornado F0Stone, 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, 8.7 hours before the alert went out and 35 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 1987-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 229 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 1987-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 84 square meters per square second.1939Sfc1 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
229 J/kg
Mixed-layer CIN
-79 J/kg
Mixed-layer LCL
1038 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
84 m²/s²
0-3 km storm-relative helicity
107 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSGF 212040
SVRSGF
MOC209-212130-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SPRINGFIELD MO
340 PM CDT SUN JUN 21 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 430 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTY OF

SOUTHWEST MISSOURI...STONE

AT 335 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM 25 MILES
SOUTHEAST OF MONETT MISSOURI MOVING EAST 20 MPH.

THIS THUNDERSTORM SHOULD CROSS PARTS OF TABLE ROCK LAKE.

BOATERS ON LAKES SHOULD MOVE TO SHELTER IMMEDIATELY.

SEVERE THUNDERSTORMS WILL PRODUCE DAMAGING WINDS..LARGE HAIL AND
DEADLY LIGHTNING.

HEAVY RAINS WILL QUICKLY FLOOD SMALL STREAMS AND LOW LYINXG AREAS.

THESE STORMS CAN PRODUCE A TORNADO WITH LITTLE OR NO ADVANCE WARNING.
BE PREPARED TO MOVE TO A PLACE OF SAFETY IF ONE IS SPOTTED.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY OR THE
NATIONAL WEATHER SERVICE.

 LEE

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 21, 3:22 PM CDTSevere Thunderstorm WarningSGFBarry, Lawrence58 min

Nearby

Severe Thunderstorm Warnings in Missouri, 1987Every severe thunderstorm warning in 1987

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.