Alert archive / Iowa / Severe Thunderstorm Warnings in 1992
Severe Thunderstorm Warning 100, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Sep 14, 1992, 7:30 PM CDT for Adams County, Iowa. It was in force for 45 min.
The area
The counties it named.
The facts
- Issued
- Sep 14, 1992, 7:30 PM CDT (00:30 UTC)
- Expired
- Sep 14, 1992, 8:15 PM CDT
- In force
- 45 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Adams County, IA
The nearest sounding before it
Omaha, NE (KOVN), launched 00:00Z, 0.5 hours before the alert went out and 144 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
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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, 1 hour 46 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 20 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, 51 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
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 14, 8:00 PM CDT | Severe Thunderstorm Warning | DMX | Union | 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.