Alert archive / Missouri / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 4, NWS Kansas City, MO
NWS Kansas City, MO issued this severe thunderstorm warning at May 11, 1987, 7:45 PM CDT for Cass County, Missouri. It was in force for 45 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
- May 11, 1987, 7:45 PM CDT (00:45 UTC)
- Expired
- May 11, 1987, 8:30 PM CDT
- In force
- 45 min
- Issued by
- NWS Kansas City, MO
- Area
- Whole counties
County Cass 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 | Remark |
|---|---|---|---|
| May 11, 8:15 PM CDT | Hail 1.75 | Cass, 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
Topeka, KS (KTOP), launched 00:00Z, 0.8 hours before the alert went out and 118 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.
- Mixed-layer CAPE
- 1932 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 1886 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- 41 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KMCI 120045
SVRMCI
MOC037-120130-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE KANSAS CITY INTL AIRPORT
745 PM CDT MON MAY 11 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 830 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY...
IN WEST CENTRAL MISSOURI
...CASS
AT 7:42 PM...3/4 INCH TO 1 INCH HAIL WAS REPORTED AT BELTON
MISSOURI...BY THE CIVIL DEFENSE.
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSgTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.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, May 11, 6:36 PM CDT, 1 hour 9 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE KANSAS CITY INTERNATIONAL AIRPORT MO 630 PM CDT TUE MAY 11 1987 A LINE OF THUNDERSTORMS HAVE DEVELOPED ALONG A WEAK COLD FRONT... JUST SOUTH OF THE KANSAS CITY METROPOLITAIN AREA DURING THE LAST HOUR. THE STORMS ARE ALONG A LINE FROM JUST NORTH OF LAWRENCE KANSAS TO ODESSA MISSOURI. HALF INCH HAIL WAS REPORTED IN BLUE SPRINGS AT ABOUT 6:25 PM. THE STORMS WILL AFFECT SOUTHERN AND CENTRAL JACKS$ON AND JOHNSON COUNTIES BETWEEN NOW AND 7:30 PM. THERE WILL BE PERIODS OF VERY HEAVY RAIN...SMALL HAIL AND GUSTY WINDS. WW
Special weather statement, May 11, 7:39 PM CDT, 6 minutes before
RADAR SUMMARY NATIONAL WEATHER SERVICE KANSAS CITY INTERNATIONAL AIRPORT MO 740 PM CDT MON MAY 11 1987 AT 730 PM...A LINE OF VERY HEAVY THUNDERSTORMS STRETCHED FROM EASTCENTRAL MISSOURI TO EASTCENTRAL KANSAS. STORMS WERE IN A 15 MILE WIDE LINE THAT STRETCHED FROM 30 MILES NORTH OF COLUMBIA MISSOURI TO JUST SOUTH OF KANSAS CITY TO 45 MILES SOUTH OF TOPEKA KANSAS. STRONGEST STORMS WERE PRODUCING BRIEF VERY HEAVY RAIN...GUSTY WINDS AND HAIL. GOLF_ BALL SIZE HAIL WAS REPORTED IN SOUTHWEST JOHNSON COUNTY KANSAS AT 655 PM AND ONE INCH HAIL WAS REPORTED AT LEES SUMMIT MISSOURI AT 715 PM. MOVMENT WAS SOUTHEAST AT 15 MPH.
The office that day
Everything else NWS Kansas City, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 11, 7:20 PM CDT | Severe Thunderstorm Warning | EAX | Cass, Jackson | 40 min |
| May 11, 7:49 PM CDT | Severe Thunderstorm Warning | EAX | Pettis, Saline | 41 min |
| May 11, 8:22 PM CDT | Severe Thunderstorm Warning | EAX | Cass | 53 min |
| May 11, 9:33 PM CDT | Severe Thunderstorm Warning | EAX | Johnson | 42 min |
| May 11, 10:24 PM CDT | Severe Thunderstorm Warning | EAX | Henry | 51 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.