Alert archive / Iowa / Severe Thunderstorm Warnings in 1992
Severe Thunderstorm Warning 85, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Aug 10, 1992, 8:09 AM CDT for Black Hawk County, Iowa. It was in force for 51 min.
The area
The counties it named.
The facts
- Issued
- Aug 10, 1992, 8:09 AM CDT (13:09 UTC)
- Expired
- Aug 10, 1992, 9:00 AM CDT
- In force
- 51 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Black Hawk County, IA
The nearest sounding before it
Minneapolis, MN (KSTC), launched 12:00Z, 1.2 hours before the alert went out and 284 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
- 2499 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- -155 m²/s²
- 0-3 km storm-relative helicity
- -4 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 KALO 101310 SVRALO IAC013-101400- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE WATERLOO IA 809 AM CDT MON AUG 10 1992 THE NATIONAL WEATHER SERVICE IN WATERLOO HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 900 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHEAST IOWA ...BLACK HAWK COUNTY AT 804 AM CDT RADAR INDICATED A SEVERE THUNDERSTORMS 12 MILES WEST OF WATERLOO IOWA. THIS STORM IS MOVING SOUTHEAST AT 20 MILES AN HOUR AND WILL PRODUCE BRIEF HEAVY RAIN...POSSIBLE LARGE HAIL AND DAMAGING WINDS. TOWNS IN THE PATH OF THIS STORM ARE WATERLOO...CEDAR FALLS...HUDSON ...LAPORTE CITY...VOORHIES...JANESVILLE AND GILBERTVILLE. PEOPLE SHOULD TAKE IMMEDIATE ACTION AS THIS STORM MOVES RAPIDLY INTO THE WATERLOO METRO AREA. WHEN THUNDERSTORMS ARE OCCURRING...MOVE INSIDE A REINFORCED BUILDING. STAY AWAY FROM WINDOWS. DON'T USE ELECTRICAL APPLIANCES OR TELEPHONES UNLESS IN AN EMERGENCY UNTIL THE STORM HAS PASSED. RR/TRS
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, Aug 10, 2:48 AM CDT, 5 hours 21 minutes before
IAZALL-100835- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 246 AM CDT MON AUG 10 1992 AT 233 AM CDT...AN AREA OF STRONG THUNDERSTORMS WAS MOVING INTO THE EXTREME SOUTHEAST CORNER OF IOWA. THESE STORMS WERE LOCATED ALON THE IOWA/MISSOURI BORDER AROUND THE FARMINGTON AND KEOKUK AREAS. THESE STORMS WILL LIKELY PRODUCE VERY HEAVY RAIN...DEADLY LIGHTNING AND POSSIBLY SOME SMALL HAIL. ISOLATED SHOWERS HAD DEVELOPED ALONG THE IOWA/MINNESOTA BORDER. THESE SHOWERS WERE LOCATED 25 MILES NORTHEAST OF MASON CITY. THE SHOWERS AND STORMS OVER EXTREME SOUTHEAST IOWA WERE MOVING NORTHEAST AT 20 MILES AN HOUR...WHILE MOVEMENT OF THE SHOWERS ALONG THE IOWA/ MINNESO TA BORDER HAD NOT YET BEEN DETERMINED. BARLOW
Special weather statement, Aug 10, 7:51 AM CDT, 18 minutes before
IAZALL-101335- RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 746 AM CDT MON AUG 10 1992 AT 734 AM CDT...ISOLATED VERY STRONG THUNDERSTORMS WERE LOCATED OVER NORTHEAST. THESE STORMS WERE LOCATED NEAR CLARKSVILLE...OR 20 MILES NORTHWEST OF WATERLOO...AND ALONG THE IOWA/WISCONSIN BORDER 50 MILES NORTHWEST OF DUBUQUE...NEAR MARQUETTE. THESE STORMS WILL PRODUCE BRIEF VERY HEAVY RAIN AND POSSIBLY SMALL HAIL. THESE STORMS WERE PART OF A 35 MILE WIDE BAND OF SHOWERS AND THUNDERSTORMS THAT EXTENDED FROM 25 MILES NORTHWEST OF WATERLOO NORTHEAST INTO SOUTHWEST WISCONSIN. ISOLATED SHOWERS WERE LOCATED OVER SOUTHEAST IOWA BETWEEN OTTUMWA... FEOSAUQUA AND MOULTON. KEOSAUQUA IS 30 MILES SOUTHEAST OF OTTUMWA WHILE MOULTON IS 25 MILES SOUTH SOUTHWEST OF OTTUMWA. THE SHOWERS AND STORMS OVER NORTHEAST IOWA WERE MOVING SOUTHEAST AT 20 MILES AN HOUR...WHILE THE SHOWERS OVER SOUTHEAST IOWA WERE MOVING NORTHEAST AT 10 MILES AN HOUR AND DISSIPATING. BARLOW
Special weather statement, Aug 10, 7:57 AM CDT, 12 minutes before
IAZALL-101335- RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 746 AM CDT MON AUG 10 1992 AT 734 AM CDT...ISOLATED VERY STRONG THUNDERSTORMS WERE LOCATED OVER NORTHEAST IOWA. THESE STORMS WERE LOCATED NEAR CLARKSVILLE...OR 20 MILES NORTHWEST OF WATERLOO...AND ALONG THE IOWA/WISCONSIN BORDER 50 MILES NORTHWEST OF DUBUQUE...NEAR MARQUETTE. THESE STORMS WILL PRODUCE BRIEF VERY HEAVY RAIN AND POSSIBLY SMALL HAIL. THESE STORMS WERE PART OF A 35 MILE WIDE BAND OF SHOWERS AND THUNDERSTORMS THAT EXTENDED FROM 25 MILES NORTHWEST OF WATERLOO NORTHEAST INTO SOUTHWEST WISCONSIN. ISOLATED SHOWERS WERE LOCATED OVER SOUTHEAST IOWA BETWEEN OTTUMWA... KEOSAUQUA AND MOULTON. KEOSAUQUA IS 30 MILES SOUTHEAST OF OTTUMWA WHILE MOULTON IS 25 MILES SOUTH SOUTHWEST OF OTTUMWA. THE SHOWERS AND STORMS OVER NORTHEAST IOWA WERE MOVING SOUTHEAST AT 20 MILES AN HOUR...WHILE THE SHOWERS OVER SOUTHEAST IOWA WERE MOVING NORTHEAST AT 10 MILES AN HOUR AND DISSIPATING. BARLOW
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 8:42 AM CDT | Severe Thunderstorm Warning | DMX | Buchanan | 33 min |
| Aug 10, 12:47 PM CDT | Severe Thunderstorm Warning | DMX | Van Buren | 12 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1992Every severe thunderstorm warning in 1992
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.