Alert archive / Iowa / Severe Thunderstorm Warnings in 1992
Severe Thunderstorm Warning 101, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Sep 14, 1992, 8:00 PM CDT for Union County, Iowa. It was in force for 45 min.
The area
The counties it named.
The facts
- Issued
- Sep 14, 1992, 8:00 PM CDT (01:00 UTC)
- Expired
- Sep 14, 1992, 8:45 PM CDT
- In force
- 45 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Union County, IA
The nearest sounding before it
Omaha, NE (KOVN), launched 00:00Z, 1.0 hours before the alert went out and 181 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
- 2201 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 588 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 234 m²/s²
- 0-3 km storm-relative helicity
- 213 m²/s²
- Significant tornado parameter
- 2.9
- Supercell composite
- 15.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KDSM 150100 SVRDSM IAC175-150145- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 800 PM CDT MON SEP 14 1992 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 845 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTH CENTRAL IOWA ...NORTHERN UNION COUNTY AT 755 PM RADAR INDICATED A SEVERE STORM IN NORTHEAST ADAMS COUNTY OR ABOUT 50 MILES TO THE SOUTHWEST OF DES MOINES. THE STORM IS MOVING TO THE EAST AT 35 MILES MILES AN HOUR AND WILL ENTERING NORTHWEST UNION COUNTY BY 805 PM. PEOPLE IN THE COMMUNITIES OF CRESTON...CROMWELL AND AFTON ARE IN THE DIRECT PATH OF 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. CEW
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 14, 5:44 PM CDT, 2 hours 16 minutes before
IAZALL-142340- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 544 PM CDT MON SEP 14 1992 AT 530 PM CDT...SCATTERED SHOWERS AND ISOLATED STRONG THUNDERSTORMS WERE OCCURRING OVER THE SOUTHERN THIRD OF IOWA. THE STRONGEST STORMS WERE LOCATED IN A NARROW BAND THAT STRETCHED FROM 35 MILES SOUTHWEST OF DES MOINES NEAR GREENFIELD...TO 15 MILES SOUTH OF DES MOINES. THESE STRONG STORMS WERE PRODUCING VERY HEAVY RAIN AND NEARLY CONTINUOUS LIGHTNING. SOME FLOODING OF STREETS AND LOW-LYING AREAS IS POSSIBLE WITH THIS VERY HEAVY RAINFALL. OTHER STRONG STORMS WERE OCCURRING 10 TO 15 MILES SOUTH OF OTTUMWA... AND 30 MILES WEST OF BURLINGTON. THE STORMS WERE PART OF AN AREA OF SHOWERS AND STORMS LOCATED MAINLY SOUTH OF A LINE FROM OMAHA/COUNCIL BLUFFS...TO DES MOINES...TO CEDAR RAPIDS...TO DAVENPORT. THE STORMS AND SHOWERS WERE MOVING EAST AT 35 MILES AN HOUR. JAK
Special weather statement, Sep 14, 6:10 PM CDT, 1 hour 50 minutes before
IAZALL-150215- SPECIAL WEATHER STATEMENT AND SHORT RANGE FORECAST FOR IOWA NATIONAL WEATHER SERVICE DES MOINES IA 610 PM CDT MON SEP 14 1992 ...STRONG THUNDERSTORMS WILL CONTINUE OVER SOUTHERN IOWA THIS EVENING... SHOWERS AND ISOLATED STRONG THUNDERSTORMS WILL CONTINUE OVER THE SOUTH HALF OF IOWA THROUGH 9 PM. MOST OF THE THUNDERSTORM ACTIVITY WILL BE OVER THE SOUTHERN THREE TIERS OF IOWA COUNTIES. SOME OF THE STORMS IN THIS AREA WILL PRODUCE ~VERY HEAVY RAIN...GUSTY WINDS...FREQUENT DEADLY LIGHTNING...AND POSSIBLY SOME HAIL. TEMPERATURES THROUGH THE EVENING HOURS WILL BE MAINLY IN THE MIDDLE 60S TO MIDDLE 70S. JAK
Special weather statement, Sep 14, 6:39 PM CDT, 1 hour 21 minutes before
IAZALL-150040- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 639 PM CDT MON SEP 14 1992 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR THE SOUTHERN THIRD OF IOWA UNTIL MIDNIGHT... AT 630 PM CDT...ISOLATED STRONG THUNDERSTORMS WERE OCCURRING OVER SOUTHWEST IOWA. THE STORMS WERE LOCATED 35 TO 45 MILES EAST OF OMAHA/ COUNCIL BLUFFS NEAR ATLANTIC. THESE STORMS WERE PRODUCING EXTREMELY HEAVY RAIN...NEARLY CONTINUOUS LIGHTNING AND PEA SIZE HAIL. IN ADDITION THE HEAVY RAINFALL MAY PRODUCE SOME FLOODING OF STREETS AND LOW-LYING AREAS. THE STORMS WERE PART OF AN AREA OF SHOWERS AND STORMS LOCATED OVER THE SOUTHERN THIRD OF IOWA. THE AREA OF RAIN WAS GENERALLY SOUTH OF A LINE EXTENDING FROM 10 MILES NORTH OF OMAHA/COUNCIL BLUFFS...TO 10 MILES NORTHEAST OF DES MOINES...TO DAVENPORT. THE STORMS AND SHOWERS WERE MOVING EAST AT 35 MILES AN HOUR. JAK
Special weather statement, Sep 14, 7:45 PM CDT, 15 minutes before
IAZALL-150145- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 745 PM CDT MON SEP 14 1992 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR THE SOUTHERN THIRD OF IOWA UNTIL MIDNIGHT... ...A FLASH FLOOD WATCH IS IN EFFECT FOR PARTS OF SOUTHWEST AND SOUTH CENTRAL IOWA UNTIL MIDNIGHT... AT 730 PM CDT...ISOLATED STRONG THUNDERSTORMS CONTINUED OVER SOUTHWEST IOWA. THE STORMS WERE OCCURRING 35 MILES EAST OF OMAHA/COUNCIL BLUFFS NEAR ATLANTIC...AND 50 MILES SOUTHEAST OF OMAHA/COUNCIL BLUFFS BETWEEN CUMBERLAND AND CORNING. ANOTHER STRONG STORM WAS LOCATED 25 MILES SOUTHEAST OF DES MOINES NEAR MELCHER. THESE STORMS WERE PRODUCING EXTREMELY HEAVY RAIN...NEARLY CONTINUOUS LIGHTNING...AND PEA TO MARBLE SIZE HAIL. THE VERY HEAVY RAIN MAY ALSO CAUSE FLOODING OF SOME STREAMS...AS WELL AS STREETS AND LOW-LYING AREAS. THE STORMS WERE PART OF AN AREA OF SHOWERS AND STORMS OCCURRING OVER THE SOUTHERN THItRD OF IOWA. THE RAIN WAS GENERALLY SOUTH OF A LINE FROM OMAHA/COUNCIL BLUFFS...TO 35 MILES NORTHWEST OF DES MOINES NEAR GUTHRIE CENTER...TO THE QUAD CITIES. THE STORMS AND SHOWERS WERE MOVING EAST AT 35 MILES AN HOUR. JAK
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 14, 7:30 PM CDT | Severe Thunderstorm Warning | DMX | Adams | 45 min |
| Sep 14, 11:07 PM CDT | Flash Flood Warning | DMX | Clarke, Union | 3 hr |
| Sep 15, 2:01 AM CDT | Flash Flood Warning | DMX | Decatur, Lucas, Wayne | 4 hr |
| Sep 15, 2:26 AM CDT | Flash Flood Warning | DMX | Clarke, Union | 4 hr |
| Sep 15, 5:53 AM CDT | Flash Flood Warning | DMX | Clarke, Decatur, Lucas, Wayne | 3 hr |
| Sep 15, 5:53 AM CDT | Flash Flood Warning | DMX | Union | 3 hr |
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.