Alert archive / Iowa / Severe Thunderstorm Warnings in 1992
Severe Thunderstorm Warning 99, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Sep 14, 1992, 5:34 AM CDT for Calhoun County, Iowa. It was in force for 26 min.
The area
The counties it named.
The facts
- Issued
- Sep 14, 1992, 5:34 AM CDT (10:34 UTC)
- Expired
- Sep 14, 1992, 6:00 AM CDT
- In force
- 26 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Calhoun County, IA
The nearest sounding before it
Omaha, NE (KOVN), launched 00:00Z, 10.6 hours before the alert went out and 186 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
- 2491 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 1434 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 124 m²/s²
- 0-3 km storm-relative helicity
- 83 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 6.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KDSM 141035 SVRDSM IAC025-141100- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 534 AM CDT MON SEP 14 1992 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 600 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN WEST CENTRAL IOWA ...CALHOUN COUNTY AT 530 AM CDT...NATIONAL WEATHER SERVICE RADAR IN DES MOINES INDICATED A SEVERE THUNDERSTORM 30 MILES SOUTHWEST OF FORT DODGE...ABOUT 5 MILES SOUTHWEST OF ROCKWELL CITY. THIS THUNDERSTORM WAS MOVING EAST AT 35 MILES AN HOUR...AND WILL BE AFFECTING ROCKWELL CITY...RINARD...AND SOMERS BETWEEN 535 AND 600 AM THIS MORNING. IF YOU ARE IN THIS AREA...YOU SHOULD MOVE INSIDE A STURDY BUILDING IMMEDIATELY. LARGE HAIL WAS INDICATED WITH THIS STORM. 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. RAP/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, Sep 13, 11:36 PM CDT, 5 hours 58 minutes before
IAZALL-140535- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1135 PM CDT SUN SEP 13 1992 AT 1125 PM CDT...WIDELY SCATTERED SHOWERS AND ISOLATED STRONG THUNDERSTORMS WERE OCCURRING OVER THE NORTHERN THIRD OF IOWA. THE STRONGEST STORM WAS LOCATED IN NORTHWEST IOWA...JUST NORTHWEST OF SPENCER. THIS STORM WAS PRODUCING BRIEF HEAVY RAIN...DEADLY LIGHTNING AND POSSIBLY SOME SMALL HAIL. THE THUNDERSTORM WAS IN A 15 MILE WIDE BAND OF SHOWERS AND STORMS EXTENDING FROM 30 MILES NORTHEAST OF SIOUX CITY...TO 25 MILES NORTHEAST OF SPENCER NEAR ESTHERVILLE. OTHER SCATTERED SHOWERS WERE LOCATED IN NORTH CENTRAL AND NORTHEAST IOWA. THE SHOWERS WERE OCCURRING IN A 20 MILE WIDE BAND STRETCHING FROM 40 MILES SOUTHWEST OF WATERLOO NEAR ELDORA...TO 55 MILES NORTHEAST OF WATERLOO NEAR WAUKON. THE SHOWERS AND STORMS WERE MOVING NORTHEAST AT 35 MILES AN HOUR. JAK
Special weather statement, Sep 14, 12:50 AM CDT, 4 hours 44 minutes before
IAZALL-140635- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1243 AM CDT MON SEP 14 1992 AT 1231 AM CDT...AN AREA OF NUMEROUS THUNDERSTORMS...SOME WITH VERY HEAVY RAIN...CONTINUED ACROSS NORTHWEST AND NORTH CENTRAL IOWA...AND ADJACENT AREAS OF MINNESOTA. THIS THUNDERSTORMS AREA WAS 30 MILES WIDE AND CENTERED ALONG A LINE EXTENDING FROM 20 MILES SOUTHWEST OF SPENCER TO THE MINNESOTA BORDER 10 MILES NORTH OF BANCROFT. A STRONG THUNDERSTORM WAS LOCATED 15 MILES NORTHEAST OF SPENCER. THESE STORMS ARE CAPABLE OF PRODUCING BRIEF VERY HEAVY RAIN...GUSTY WINDS...FREQUENT DEADLY LIGHTNING...AND HAIL. INTENSITY HAD INCREASED SINCE 1125 PM. MOVEMENT WAS NORT4HEAST AT 25 MILES AN HOUR. / ALSO...A 70 MILE WIDE AREA OF WIDELY SCATTERED SHOWERS AND THUNDERSTORMS WAS LOCATED ACROSS NORTHEAST IOWA AND ADJACENT AREAS OF WISCONCIN AND MINNESOTA. MOVEMENT WAS NORTHEAST AT 30 MILES AN HOUR. R A PRENTICE
Special weather statement, Sep 14, 4:51 AM CDT, 43 minutes before
IAZALL-141035- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 446 AM CDT MON SEP 14 1992 AT 431 AM CDT...AN AREA OF SCATTERED THUNDERSTORMS...SOME WITH VERY HEAVY RAIN...CONTINUED ACROSS THE NORTHERN HALF OF IOWA...AND ADJACENT AREAS OF NEBRASKA...MINNESOTA AND WISCONSIN. THIS THUNDERSTORMS AREA WAS LOCATED NORTH OF A LINE EXTENDING FROM 30 MILES NORTHWEST OF COUNCIL BLUFFS NEAR MONDAMIN...TO FORT DODGE...TO 25 MILES SOUTHWEST OF WATERLOO...TO JUST NORTHWEST OF DUBUQUE. THE STRONGEST STORMS WERE LOCATED 10 MILES SOUTHWEST OF ESTHERVILLE... JUST NORTH OF SPENCER...10 MILES NORTHWEST OF IDA GROVE...10 MILES SOUTHWEST OF STORM LAKE...AND NEAR GILMORE CITY. MOVEMENT WAS EAST AT 35 MILES AN HOUR. R A PRENTICE ALSO...A 70 MILE WIDE AREA OF WIDELY SCATTERED SHOWERS AND THUNDERSTORMS WAS LOCATED ACROSS NORTHEAST IOWA AND ADJACENT AREAS OF WISCONCIN AND MINNESOTA. MOVEMENT WAS NORTHEAST AT 30 MILES( AN HOUR. R A PRENTICE
Special weather statement, Sep 14, 5:13 AM CDT, 21 minutes before
IAZALL-141035- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 446 AM CDT MON SEP 14 1992 AT 431 AM CDT...AN AREA OF SCATTERED THUNDERSTORMS...SOME WITH VERY HEAVY RAIN...CONTINUED ACROSS THE NORTHERN HALF OF IOWA...AND ADJACENT AREAS OF NEBRASKA...MINNESOTA AND WISCONSIN. THIS THUNDERSTORMS AREA WAS LOCATED NORTH OF A LINE EXTENDING FROM 30 MILES NORTHWEST OF COUNCIL BLUFFS NEAR MONDAMIN...TO FORT DODGE...TO 25 MILES SOUTHWEST OF WATERLOO...TO JUST NORTHWEST OF DUBUQUE. THE STRONGEST STORMS WERE LOCATED 10 MILES SOUTHWEST OF ESTHERVILLE... JUST NORTH OF SPENCER...10 MILES NORTHWEST OF IDA GROVE...10 MILES SOUTHWEST OF STORM LAKE...AND NEAR GILMOREx CITY. MOVEMENT WAS EAST AT 35 MILES AN HOUR. R A PRENTICE
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 13, 9:56 PM CDT | Severe Thunderstorm Warning | DMX | Kossuth | 22 min |
| Sep 14, 12:10 AM CDT | Severe Thunderstorm Warning | DMX | Emmet, Palo Alto | 35 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.