Alert archive / Iowa / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 70, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 24, 1987, 4:24 PM CDT for Hardin County, Iowa. It was in force for 36 min.
The area
The counties it named.
The facts
- Issued
- Jun 24, 1987, 4:24 PM CDT (21:24 UTC)
- Expired
- Jun 24, 1987, 5:00 PM CDT
- In force
- 36 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Hardin County, IA
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
Omaha, NE (KOAX), launched 12:00Z, 9.4 hours before the alert went out and 285 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
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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, 40 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
Special weather statement, Jun 24, 4:20 PM CDT, 4 minutes before
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</html>The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 24, 4:02 PM CDT | Severe Thunderstorm Warning | DMX | Buena Vista | 40 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; the sounding from the Mesonet's radiosonde archive.