Alert archive / Iowa / Severe Thunderstorm Warnings in 1992
Severe Thunderstorm Warning 87, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Aug 10, 1992, 12:47 PM CDT for Van Buren County, Iowa. It was in force for 12 min.
The area
The counties it named.
The facts
- Issued
- Aug 10, 1992, 12:47 PM CDT (17:47 UTC)
- Expired
- Aug 10, 1992, 12:59 PM CDT
- In force
- 12 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Van Buren County, IA
The nearest sounding before it
Topeka, KS (KTOP), launched 12:00Z, 5.8 hours before the alert went out and 370 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
- 1843 J/kg
- Mixed-layer CIN
- -175 J/kg
- Mixed-layer LCL
- 926 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 230 m²/s²
- 0-3 km storm-relative helicity
- 293 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.7
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KDSM 101747 SVRDSM IAC177-101815- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 1247 PM CDT MON AUG 10 1992 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 115 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHEAST IOWA ...SOUTHERN VAN-BUREN COUNTY AT 1244 PM CDT...NATIONAL WEATHER SERVICE RADAR IN DES MOINES INDICATED A SEVERE THUNDERSTORM 30 MILES SOUTHEAST OF OTTUMWA NEAR KEOSAUQUA. THE THUNDERSTORM WAS MOVING SOUTH AT 25 MILES AN HOUR...AND WILL BE MOVING TO NEAR MOUNT STERLING BY 105 PM. WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A STRONG BUILDING. DO NOT STAND BY WINDOWS. DON'T USE TELEPHONES OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM HAS PASSED. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS. KALLMAN/SULLIVAN
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, 8:47 AM CDT, 4 hours before
IAZALL-101335- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 845 AM CDT MON AUG 10 1992 AT 834 AM CDT..A 20 MILE WIDE LINE OF THUNDERSTORMS WAS IN NORTHEAST IOWA...EXTENDING FROM 50 MILES NORTH OF DUBUQUE TO 25 MILES WEST OF WATERLOO NEAR GRUNDY CENTER. THE STRONGEST STORMS IN THE LINE WERE 15 MILES SOUTHWEST OF WATERLOO...30 MILES NORTHWEST OF DUBUQUE NEAR GUTTENBERG AND 20 MILES EAST OF WATERLOO NEAR INDEPENDENCE. STRONG GUSTY WINDS...DANGEROUS LIGHTNING...AND HAIL ARE POSSIBLE WITH THESE STORMS AS THEY MOVE SOUTHEAST AT 20 MILES AN HOUR. SULLIVAN BARLOW
Special weather statement, Aug 10, 9:41 AM CDT, 3 hours 6 minutes before
IAZALL-101535- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 940 AM CDT MON AUG 10 1992 AT 928 AM CDT..A 20 MILE WIDE LINE OF THUNDERSTORMS WAS MOVING FROM NORTHEAST INTO EAST CENTRAL IOWA. THE LINE EXTENDED FROM NEAR DUBUQUE TO 10 MILES SOUTH OF MARSHALLTOWN...AND WAS MOVING SOUTH AT 20 MILES AN HOUR. THE STRONGEST THUNDERSTORMS IN THE LINE WERE 15 MILES WEST OF DUBUQUE NEAR DYERSVILLE...20 MILES NORTH OF CEDAR RAPIDS...AND 15 MILES SOUTHEAST OF MARSHALLTOWN NEAR TAMA AND TOLEDO. VERY STRONG GUSTY WINDS...DANGEROUS LIGHTNING...AND HAIL ARE POSSIBLE WITH THESE STORMS. IF THREATENING WEATHER APPROACHES YOU...MOVE INSIDE A STURDY BUILDING AND STAY AWAY FROM ALL WINDOWS. SULLIVAN
Local storm report, Aug 10, 10:25 AM CDT, 2 hours 22 minutes before
LOCAL STORM REPORT NATIONAL WEATHER SERVICE WATERLOO IA 1025 AM CDT MON AUG 10 1992 TIME COUNTY EVENT AND LOCATION 855 AM CDT BUCHANAN CO ROWLEY REPORTED PEA SIZE HAIL AND P WINDS 50 TO 60 MPH. RR
Local storm report, Aug 10, 10:26 AM CDT, 2 hours 21 minutes before
LOCAL STORM REPORT NATIONAL WEATHER SERVICE WATERLOO IA 1025 AM CDT MON AUG 10 1992 TIME COUNTY EVENT AND LOCATION 855 AM CDT BUCHANAN CO ROWLEY REPORTED PEA SIZE HAIL AND T WINDS 50 TO 60 MPH. RR
Special weather statement, Aug 10, 11:38 AM CDT, 1 hour 9 minutes before
IAZALL-101735- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1137 AM CDT MON AUG 10 1992 AT 1130 AM CDT..SHOWERS AND STRONG THUNDERSTORMS WERE OCCURRING IN A 15 MILE WIDE BAND OVER SOUTHEAST IOWA. THE BAND OF SHOWERS AND STORMS EXTENDED FROM JUST EAST OF OTTUMWA...TO NEAR DAVENPORT. THE STRONGEST STORMS IN THIS AREA WERE LOCATED 25 TO 40 MILES NORTHEAST OF OTTUMWA...OR NEAR RICHLAND AND BRIGHTON. THESE STOR^MS WERE PRODUCING VERY HEAVY RAIN...GUSTY WINDS...DANGEROUS LIGHTNING AND POSSIBLY SOME SMALL HAIL. THE STORMS AND SHOWERS WERE MOVING SOUTH AT AROUND 25 MILES AN HOUR. JAK
Special weather statement, Aug 10, 12:39 PM CDT, 8 minutes before
IAZALL-101735- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1237 PM CDT MON AUG 10 1992 AT 1227 PM CDT..STRONG THUNDERSTORMS WERE OCCURRING IN A 15 MILE WIDE BAND
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 8:09 AM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 51 min |
| Aug 10, 8:42 AM CDT | Severe Thunderstorm Warning | DMX | Buchanan | 33 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.