Alert archive / Missouri / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 49, NWS St. Louis, MO

July 8, 1987Adair County, Knox County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jul 8, 1987, 3:42 PM CDT for Adair County, Knox County, Missouri. It was in force for 48 min.

The area

The counties it named.

The facts

Issued: Jul 8, 1987, 3:42 PM CDT (20:42 UTC)
Expired: Jul 8, 1987, 4:30 PM CDT
In force: 48 min
Issued by: NWS St. Louis, MO
Area: Whole counties

Counties Adair County, MO, Knox 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

Peoria Regional, IL (KPIA), launched 12:00Z, 8.7 hours before the alert went out and 242 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: 372 J/kg
Mixed-layer CIN: -91 J/kg
Mixed-layer LCL: 1006 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: -53 m²/s²
0-3 km storm-relative helicity: -45 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 KSTL 082042
SVRSTL
MOC001-103-082130-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
342 PM CDT WED JUL 8 1987

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

NORTHEAST MISSOURI... SOUTHEAST ADAIR AND KNOX

AT 340 PM CDT A SEVERE THUNDERSTORM WAS 15 MILES SOUTHEAST OF
KIRKSVILLE MISSOURI MOVING NORTHEAST AT 25 MPH.

BE ALERT FOR DAMAGING WIND...LARGE HAIL AND FREQUENT LIGHTNING.  STAY
INDOORS AWAY FROM WINDOWS.  AVOID USING THE TELEPHONE AND ELECTRIC
APPLIANCES.  BE ALERT FOR FLOODING OF STREAMS AND LOW AREAS.

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

MCCARTHY

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jul 8, 3:25 PM CDT, 17 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA MO
215 PM CDT WED JUL 8 1987

...SEVERE THUNDERSTORM WATCH UNTIL 9PM IN NORTH CENTRAL MISSOURI...
...STRONG THUNDERSTORMS DEVELOPING RAPIDLY AROUND CENTRAL MISSOURI...

AT 205 PM..STRONG THUNDERSTORMS WERE BUILDING RAPIDLY IN PARTS OF
CENTRAL MISSOURI FROM 10 MILES WEST OF SEDALIA TO JUST WEST OF COLUMBIA
THEN NORTH TO KIRKSVILLE IN A LINE ABOUT 15 MILES WIDE.  NUMEROUS OTHER
SCATTERED SHOWERS WERE ALSO SEEN TO BE DEVELOPING AROUND MID MISSOURI.
THE SHOWERS AND THUNDERSTORMS WERE MOVING NORTHEAST AT 35 MPH.

THE STRONGEST OF THE STORMS WAS 7 MILES NORTH OF MOBERLY IN THE NORTH
AND 20 MILES WEST OF WARSAW IN THE SOUTHWEST.  ANY OF THESE THUNDER-
STORMS MAY PRODUCE BRIEF..LOCALLY HEAVY RAIN ALONG WITH GUSTY WINDS AND
AT LEAST SMALL HAIL ALONG WITH DANGEROUS LIGHTNING.

LARM

Nearby

Severe Thunderstorm Warnings in Missouri, 1987 Every 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; the sounding from the Mesonet's radiosonde archive.