Alert archive / Iowa / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 71, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 24, 1987, 8:05 PM CDT for Greene County, Iowa. It was in force for 35 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 24, 1987, 8:05 PM CDT (01:05 UTC)
- Expired
- Jun 24, 1987, 8:40 PM CDT
- In force
- 35 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Greene County, IA
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 |
|---|---|---|---|
| Jun 24, 8:08 PM CDT | Thunderstorm Wind 52 | Greene, IA |
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
Omaha, NE (KOAX), launched 00:00Z, 1.1 hours before the alert went out and 182 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3564 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 79 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 KDSM 250105 SVRDSM IAC073-250140- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 805 PM CDT WED JUN 24 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 840 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF WEST CENTRAL IOWA... NORTHERN GREENE AT 757 PM...DES MOINES WEATHER RADAR INDICATED A SEVERE THUNDERSTORM IN NORTHERN GREENE COUNTY NEAR CHURDAN OR 60 MILES NORTHWEST OF DES MOINES. THE STORM WAS MOVING TO THE EAST SOUTHEAST AT 20 MILES AN HOUR AND WILL AFFECT THE COMMUNITIES OF PATON...DANA AND CHURDAN ALL NORTH OF HIGHWAY 30. MARBLE TO GOLFBALL-SIZED HAIL AND WINDS OVER 60 MILES AN HOUR IS LIKELY FROM THIS STORM. IF THREATENING WEATHER APPROACHES..YOU SHOULD GO TO A SAFE PLACE IMMEDIATELY. IF SEVERE WEATHER CONDITIONS ARE OBSERVED..PLEASE ASK THE NEAREST LAW ENFORCEMENT AGENCY TO RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE. MYERS
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, Jun 24, 5:47 PM CDT, 2 hours 18 minutes before
<PQ<
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
545 PM CDT WED JUN 24 1987
...STRONG THUNDERSTORMS OVER CENTRAL IOWA...
AT 543 PM...RADAR INDICATED AN AREA OF STRONG STORMS OVER CENTRAL IOWA.
THE AREA STRETCHED FROM NEAR MARSHALLTOWN TO JUST SOUTHWEST OF NEWTON...
OR FROM 50 NORTHEAST OF DES MOINES TO 25 MILES EAST OF DES MOINES. THE
STORMS WERE MOVING EAST AT 25 MILES AN HOUR...AND WILL BE MOVING THROUGHC
EASTERN MARSHALL AND JASPER COUNTIES BETWEEN 545 PM AND 630 PM.
WINDS OF UP TO 50 MILES AN HOUR...PEA TO MARBLE SIZED HAIL...AND
EXTREMELY HEAVY RAINS CAN BE EXPECTED WITH THE PASSAGE OF THESE STORMS.
TRUETTSpecial weather statement, Jun 24, 5:51 PM CDT, 2 hours 14 minutes before
SEVERE WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
5 40PM CDT WED JUN 24 1987
AT 5 30 PM CDT...INTENSE THUNDERSTORMS WERE LOCATED IN CENTRAL IOWA
ABOUT 10 MILES SOUTH OF MARSHALLTOWN...AND IN NORTHWEST IOWA ABOUT 15
MILES EAST OF SIOUX CITY...AND ALSO ABOUT 15 MILES SOUTH OF SIOUX CITY.
NO SEVERE WEATHER HAS BEEN REPORTED WITH THESE STORMS SINCE 4 30 PM...
BUT PEA TO MARBLE SIZE HAIL...WINDS TO 50 MILES AN HOUR...AND VERY HEAVY
RAINS MAY BE EXPECTED FROM THESE STORMS.
A FEW HEAVY THUNDERSTORMS WERE ALSO LOCATED IN CENTRAL IOWA JUST WEST
OF DES MOINES.
OTHER THUNDERSTORMS WERE SCATTERED THROUGH CENTRAL...NORTH CENTRAL AND
NORTHWEST IOWA BETWEKEN MARSHALLTOWN AND ESTERVILLE.
THE THUNDERSTORMS WERE MOVING EAST AT 25 MILES AN HOUR.
SCOTT
SCOTTSpecial weather statement, Jun 24, 6:23 PM CDT, 1 hour 42 minutes before
<PQ< SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 620 PM CDT WED JUN 24 1987 ...STRONG THUNDERSTORMS CONTINUE OVER CENTRAL IOWA... AT 620 PM...WEATHER SERVICE RADAR CONTINUED TO INDICATE AN AREA OF STRONG STORMS OVER CENTRAL IOWA...STRETCHING FROM WEST CENTRAL TAMA COUNTY A FEW MILES WEST OF TOLEDO...TO NEAR NEWTON...OR ABOUT 40 MILES WEST OF CEDAR RAPIDS TO 25 MILES EAST OF DES MOINES. THESE STORMS CONTINUED MOVING EAST AT 25 MILES AN HOUR...AND WILL BE MOVING THROUGH TAMA...EASTERN JASPER...AND POWESHIEK COUNTIES...AND THE CITIES OF TAMA...TOLEDO...GRINNELL AND NEWTON...BETWEEN 620 PM AND 720 PM THIS EVENING. WINDS OF 40 TO 50 MILES AN HOUR... PEA TO MARBLE iSIZED HAIL...AND EXTREMELY HEAVY RAINS CAN BE EXPECTED WITH THE PASSAGE OF THESE STORMS. TRUETT
Special weather statement, Jun 24, 6:52 PM CDT, 1 hour 13 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 640 PM CDT WED JUN 24 1987 AT 630 PM...THUNDERSTORMS WITH VERY HEAVY RAINS CONTINUED IN CENTRAL IOWA NEAR TAMA AND MONTEZUMA...ABOUT 50 MILES NORTHEAST THROUGH EAST OF DES MOINES...AND ALSO NEAR MADRID...ABOUT 20 MILES NORTHWEST OF DES MOINES. INTENSE THUNDERSTORMS WERE ALSO LOCATED IN WEST CENTRAL IOWA NEAR ONAWA...ABOUT 30 MILES SOUTHEAST OF SIOUX CITY. VERY HEAVY RAINS...WINDS TO 50 MILES AN HOUR...AND PEA TO MARBLE SIZE HAIL MAY STILL BE EXPECTED FROM THESE STORMS. OTHER THUNDERSTORMS WERE LOCATED IN NORTHWEST AND WEST CENTRAL IOWA BETWEEN ONAWA AND POCAHONTAS. SCOTT
Special weather statement, Jun 24, 7:15 PM CDT, 50 minutes before
<PQ< SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 715 PM CDT WED JUN 24 1987 ...STRONG THUNDERSTORMS CONTINUE OVER EAST CENTRAL IOWA... AT 715 PM...WEATHER SERVICE RADAR CONTINUED TO INDICATE AN AREA OF STRONG THUNDERSTORMS OVER EAST CENTRAL IOWA. THE STORMS STRETCHED FROM NORTHEAST TAMA COUNTY...ABOUT 30 MILES NORTHWEST OF CEDAR RAPIDS...TO SOUTHERN POWESHIEK COUNTY NEAR MONTEZUMA...ABOUT 50 MILES SOUTHWEST OF CEDAR RAPIDS. THE STORMS WERE MOVING EAST AT 25 MILES AN HOUR...AND WILL BE MOVING THROUGH BENTON...IOWA...AND EASTERN POWESHIEK COUNTIES... AND THE CITIES OF VINTON...BELLE PLAINE...MARENGO...AND WILLIAMSBURG BETWEEN 715 PM AND 8 PM THIS EVENING. WINDS OF 30 TO 40 MILES AN HOUR...PEA TO MARBLE SIZED HAIL...AND EXTREMELY HEAVY RAINS CAN BE EXPECTED WITH THE STORMS. < IF THE STORMS KEEP MOVING EAST AT 25 MILES AN HOUR...THEY SHOULD ENTER THE CEDAR RAPIDS AND IOWA CITY AREAS BETWEEN 8 AND 830 PM THIS EVENING. NO SEVERE WEATHER HAS BEEN REPORTED WITH THESE STORMS AS OF 715 PM. TRUETT
Special weather statement, Jun 24, 7:49 PM CDT, 16 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 740 PM CDT WED JUN 24 1987 AT 730 PM...NUMEROUS INTENSE THUNDERSTORMS WERE LOCATED IN A BAND EXTENDING FROM WEST CENTRAL OOWA THROUGH CENTRAL INTO EAST CENTRAL IOWA. THESE THUNDERSTORMS WERE CLUSTERED INTO THREE MAIN GROUPS. THE FIRST GROUP WAS LOCATED IN WEST CENTRAL IOWA BETWEEN LOGAN AND DENISON...OR ABOUT 30 TO 40 MILES NORTHEAST OF OMAHA. THE SECOND AREA WAS LOCATED ABOUT 30 MILES NORTH OF DES MOINES NEAR NEVADA...AND THE THIRD WAS LOCATED ABOUT 15 TO 30 MILES WEST THROUGH SOUTHWEST OF CEDAR RAPIDS. VERY HEAVY RAINS...WINDS TO 40 MILES AN HOUR...AND PEA TO MARBLE SIZE HAIL MAY STILL BE EXPECTED FROM THESE STORMS. OTHER THUNDERSTORMS WERE LOCATED IN NORTHWEST IOWA ALONG THE MISSOURI RIVER AND EXTENDING NORTH TO NEAR SIOUX FALLS...AND EAST TO NEAR FORT DODGE. THESE THUNDERSTORMS WERE MOVING TO THE EAST AT 25 MILES AN HOUR. SCOTT
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 24, 8:59 PM CDT | Severe Thunderstorm Warning | DMX | Adams, Taylor | 51 min |
| Jun 24, 9:12 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Madison | 63 min |
| Jun 24, 9:51 PM CDT | Tornado Warning | DMX | Union | 29 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 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.