Alert archive / Iowa / Severe Thunderstorm Warnings in 1989
Severe Thunderstorm Warning 1, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Apr 24, 1989, 9:27 AM CDT for Cherokee County, Iowa. It was in force for 63 min.
The area
The counties it named.
The facts
- Issued
- Apr 24, 1989, 9:27 AM CDT (14:27 UTC)
- Expired
- Apr 24, 1989, 10:30 AM CDT
- In force
- 63 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County Cherokee 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, 2.5 hours before the alert went out and 169 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
- 3654 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 234 m²/s²
- 0-3 km storm-relative helicity
- 249 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, Apr 24, 5:43 AM CDT, 3 hours 44 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 545 AM CDT MON APR 24 1989 ...INTENSE THUNDERSTORMS IN SIOUXLAND AREA THIS MORNING... AT 540 AM CDT RADAR INDICATED AN AREA OF INTENSE THUNDERSTORMS EXTENDING FROM SIOUX CITY SOUTH 30 MILES TO NEAR ONAWA AND SOUTHWEST 35 MILES INTO NEBRASKA. THESE THUNDERSTORMS WERE MOVING NORTHEAST ABOUT 15 MILES AN HOUR. PERSONS IN WOODBURY AND MONONA COUNTIES OF WEST CENTRAL IOWA CAN EXPECT GUSTY WINDS...SMALL HAIL AND VERY HEAVY RAIN AS THESE STORMS MOVE THROUGH THE SIOUXLAND AREA. KROPP
Special weather statement, Apr 24, 9:08 AM CDT, 19 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 905 AM CDT MON APR 24 1989 ...VERY STRONG THUNDERSTORMS OVER IDA AND CHEROKEE COUNTIES IN IOWA... AT 900 AM CDT RADAR SHOWED AN AREA OF VERY STRONG THUNDERSTORMS FROM JUST NORTHWEST OF IDA GROVE TO ABOUT 5 MILES SOUTHEAST OF MARCUS IOWA... 50 MILES WEST TO 40 MILES NORTHEAST OF SIOUX CITY. THE STORMS WERE MOVING NORTHEAST AT 20 MILES AN HOUR. THESE STORMS HAVE THE POTENTIAL FOR HEAVY RAIN SHOWERS...SMALL HAIL DANGEROUS LIGHTNING AND STRONG GUSTY WINDS. RESIDENTS OF CHEROKEE AND IDA COUNTIES...IN NORTHWEST IOWA...SHOULD WATCH THE WEATHER CLOSELY AND BE PREPARED TO GO TO A SAFE SHELTER IF SEVERE WEATHER DEVELOPES. SHERLIN5
Special weather statement, Apr 24, 9:10 AM CDT, 17 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 905 AM CDT MON APR 24 1989 ...VERY STRONG THUNDERSTORMS OVER IDA AND CHEROKEE COUNTIES IN IOWA... AT 900 AM CDT RADAR SHOWED AN AREA OF VERY STRONG THUNDERSTORMS FROM JUST NORTHWEST OF IDA GROVE TO ABOUT 5 MILES SOUTHEAST OF MARCUS IOWA... 50 MILES EAST TO 40 MILES NORTHEAST OF SIOUX CITY. THE STORMS WERE MOVING NORTHEAST AT 20 MILES AN HOUR. THESE STORMS HAVE THE POTENTIAL FOR HEAVY RAIN SHOWERS...SMALL HAIL DANGEROUS LIGHTNING AND STRONG GUSTY WINDS. RESIDENTS OF CHEROKEE AND IDA COUNTIES...IN NORTHWEST IOWA...SHOULD WATCH THE WEATHER CLOSELY AND BE PREPARED TO GO TO A SAFE SHELTER IF SEVERE WEATHER DEVELOPES. SH8ERLIN ...CORRECTION TO LOCATION IN FIRST PARA...
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 24, 9:57 AM CDT | Severe Thunderstorm Warning | FSD | O'Brien | 63 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1989Every severe thunderstorm warning in 1989
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.