Alert archive / Iowa / Severe Thunderstorm Warnings in 1992
Severe Thunderstorm Warning 89, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Aug 25, 1992, 2:36 PM CDT for Tama County, Iowa. It was in force for 44 min.
The area
The counties it named.
The facts
- Issued
- Aug 25, 1992, 2:36 PM CDT (19:36 UTC)
- Expired
- Aug 25, 1992, 3:20 PM CDT
- In force
- 44 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Tama County, IA
The nearest sounding before it
Minneapolis, MN (KSTC), launched 12:00Z, 7.6 hours before the alert went out and 320 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
- 611 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- -33 m²/s²
- 0-3 km storm-relative helicity
- 59 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 251936 SVRDSM IAC171-252030- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 236 PM CDT TUE AUG 25 1992 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 330 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN CENTRAL IOWA ...NORTHERN TAMA COUNTY AT 230 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM 40 MILES SOUTHWEST OF WATERLOO NEAR LE GRAND. MOVEMENT WAS NORTHEAST AT 35 MILES AN HOUR. THIS STORM WAS MOVING TOWARD GARWIN AND UNION GROVE. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN... ANDB DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. BURKE
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 25, 1:17 PM CDT, 1 hour 19 minutes before
IAZ006>011-016>019-026>029-038>040-251910- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 115 PM CDT TUE AUG 25 1992 ...ISOLATED STRONG THUNDERSTORM ALONG HIGHWAY 20 NEAR WATERLOO... AT 110 PM CDT AN ISOLATED STRONG THUNDERSTORM HAD DEVELOPED SOUTHWEST OF WATERLOO NEAR THE TOWN OF HUDSON. THIS STORM WAS PRODUCING HEAVY RAINS AND SOME PEA SIZE HAIL. THIS STORM WAS MOVING NORTHEAST AT 30 MILES AN HOUR. THIS STORM WILL AFFECT THED TOWNS OF WAVERLY...DENVER AND DUNKERTON THROUGH 2 PM. TRS
Special weather statement, Aug 25, 1:53 PM CDT, 43 minutes before
IAZALL-251940- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 151 PM CDT TUE AUG 25 1992 AT 136 PM CDT...A CLUSTER OF INTENSE THUNDERSTORMS WAS LOCATED OVER NORTHEAST IOWA BETWEEN WATERLOO AND INDEPENDENCE. INDEPENDENCE IS 20 MILES EAST OF WATERLOO. THESE STORMS WILL PRODUCE EXTREMELY HEAVY RAIN...FREQUENT DEADLY LIGHTNING AND HAIL. THIS CLUSTER OF STORMS WAS PART OF A LARGE AREA OF SCATTERED SHOWERS AND THUNDERSTORMS LOCATED BETWEEN WATERLOO...DUBUQUE AND CEDAR RAPIDS. SHOWERS AND ISOLATED THUNDERSTORMS CONTINUED OVER THE WESTERN HALF OF IOWA. THE SHOWERS AND STORMS IN THIS AREA WERE LOCATED ALONG AND WEST OF A LINE THAT EXTENDED FROM BEDFORD OR 70 MILES SOUTHWEST OF DES MOINES NORTHEAST TO NEWTON THEN NORTH TO THE IOWA/MINNESOTA BORDER NEAR BUFFALO CENTER. NEWTON IS 30 MILES NORTHEAST OF DES MOINES WHILE BUFFALO CENTER IS 30 MILES NORTHWEST OF MASON CITY. THE SHOWERS AND STORMS WERE MOVING NORTHEAST AT 30 MILES AN HOUR. BARLOW
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 1:37 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk, Buchanan, Fayette | 53 min |
| Aug 25, 3:23 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 52 min |
| Aug 25, 5:16 PM CDT | Severe Thunderstorm Warning | DMX | Jefferson | 29 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.