Alert archive / Iowa / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 69, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 24, 1987, 4:02 PM CDT for Buena Vista County, Iowa. It was in force for 40 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, 4:02 PM CDT (21:02 UTC)
- Expired
- Jun 24, 1987, 4:42 PM CDT
- In force
- 40 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Buena Vista 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, 4:08 PM CDT | Hail 1.75 | Buena Vista, 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 12:00Z, 9.0 hours before the alert went out and 187 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
- 3614 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 52 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 242103 SVRDSM IAC021-242145- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 402 PM CDT WED JUN 24 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 445 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF NORTHWEST IOWA... BUENA VISTA AT 4 PM...WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM NEAR STORM LAKE...ABOUT 35 MILES SOUTH OF SPENCER. THE STORM WAS MOVING EAST AT 25 MILES AN HOUR...AND WILL BE AFFECTING THE CITIES OF LAKESIDE...SULPHUR SPRINGS...AND STORM LAKE. < REMEMBER..A SEVERE THUNDERSTORM CAN PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH..LARGE HAIL..DEADLY LIGHTNING..AND HEAVY RAINS THAT CAN QUICKLY FLOOD LOW LYING AREAS. PEOPLE IN THE PATH OF THIS STORM SHOULD TAKE APPROPRIATE ACTION IMMEDIATELY. SCOTT/TRUETT
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, 3:44 PM CDT, 18 minutes before
<PQ< SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 345 PM CDT TUE JUN 23 1987 AT 340 PM...AN INTENSE THUNDERSTORM WAS CENTERED ABOUT 15 MILES NORTHWEST OF THE CITY OF STORM LAKE IN NORTHWEST IOWA OR 35 MILES SOUTH OF SPENCER. PERSONS ON STORM LAKE SHOULD HEAD FOR SHORE. THIS STORM IS CAPABLE OF 50 MILE AN HOUR WINDS...MARBLE-SIZED HAIL...INTENSE RAINFALL AND DEADLY LIGHTNING. THE STORM WILL BE IN THE STORM LAKE VICtINITY UNTIL 415 PM. MOVEMENT WAS TO THE EAST AROUND 20 MILES AN HOUR. MYERS
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 24, 4:24 PM CDT | Severe Thunderstorm Warning | DMX | Hardin | 36 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.