Alert archive / Iowa / Flash Flood Warnings in 1992
Flash Flood Warning 7, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Sep 14, 1992, 11:07 PM CDT for Clarke County, Union County, Iowa. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Sep 14, 1992, 11:07 PM CDT (04:07 UTC)
- Expired
- Sep 15, 1992, 2:15 AM CDT
- In force
- 3 hr
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Clarke County, IA, Union County, IA
The nearest sounding before it
Omaha, NE (KOVN), launched 00:00Z, 4.1 hours before the alert went out and 200 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 150428 COR FFWDSM IAC039-175-150715- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING...CORECTION...SPELLING NATIONAL WEATHER SERVICE DES MOINES IA 1125 PM CDT MON SEP 14 1992 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 215 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTH CENTRAL IOWA ...CLARKE COUNTY...UNION COUNTY HEAVY RAINS OF BETWEEN 2 AND 4 INCHES FELL IN THESE COUNTIES BETWEEN 6 PM AND 1100 PM THIS EVENING. THESE HEAVY RAINS HAVE CAUSED FLASH FLOODING IN MUCH OF UNION AND CLARKE COUNTIES OR ABOUT 30 TO 40 MILES TO THE SOUTH AND SOUTHWEST OF DES MOINES. LORIMOR IN NORTHERN UNION COUNTY HAD 5.8 INCHES OF RAIN SINCE 7AM. / A FLASH FLOOD WARNING MEANS FLOODING IS IMMINENT OR IS OCCURRING. TAKE NECESSARY PRECAUTIONS IMMEDIATELY. AT 1055 PM COUNTY ROAD P33 JUST TO THE NORTHEAST OF CRESTON HAD WATER OVER THE ROAD AND WAS IMPASSABLE. IN AFTON...SIGNIFICANT STREET FLOODING WAS OCCURRING. HIGHWAY 69 WAS BLOCKED DUE TO WATER OVER THE ROAD 2 MILES TO THE SOUTH OF OSCEOLA IN CLARK COUNTY. IN OSCEOLA...UNDERPASSES WERE FLOODED. OTHER STREETS IN OSCEOLA WERE BECOMING FLOODED. AT 1105 PM RADAR INDICATED THAT PERIODS OF HEAVY RAINS WILL CONTINUE ACROSS UNION AND CLARKE COUNTIES UNTIL AFTER MIDNIGHT. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED...ACT QUICKLY. MOVE UP TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. CEW
What forecasters said that day
The local office's own words before this flash flood 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, 7:45 PM CDT, 3 hours 22 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
Special weather statement, Sep 14, 8:44 PM CDT, 2 hours 23 minutes before
IAZALL-150245- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 840 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 830 PM CDT...SCATTERED VERY STRONG THUNDERSTORMS CONTINUED OVER SOUTHWEST AND SOUTH CENTRAL IOWA. THE STRONGEST STORMS WERE LOCATED FROM CUMBERLAND TO CRESTON...OR FROM 45 MILES EAST OF COUNCIL BLUFFS TO 45 MILES SOUTHWEST OF DES MOINES. OTHER STRONG STORMS WERE LOCATED NEAR ALBIA...45 MILES SOUTHEAST OF DES MOINES. 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 SOUTHE&RN THIRD OF IOWA. THE RAIN WAS GENERALLY SOUTH OF A LINE FROM OMAHA/COUNCIL BLUFFS...TO 20 MILES NORTH OF DES MOINES NEAR MADRID...TO THE QUAD CITIES. THE STORMS AND SHOWERS WERE MOVING EAST AT 35 MILES AN HOUR. MILLER
Special weather statement, Sep 14, 9:14 PM CDT, 1 hour 53 minutes before
IAZALL-150315- SPECIAL WEATHER STATEMENT AND SHORT RANGE FORECAST FOR IOWA NATIONAL WEATHER SERVICE DES MOINES IA 915 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 904 PM CDT...ISOLATED VERY STRONG THUNDERSTORMS AND SCATTERED STRONG THUNDERSTORMS CONTINUED OVER SOUTHWEST...SOUTH CENTRAL...AND SOUTHEAST IOWA. THE STRONGEST OF THESE STORMS WERE LOCATED 10 MILES EAST OF ATLANTIC...OR 50 MILES EAST OF COUNCIL BLUFFS...NEAR AFTON OR 40 MILES SOUTHWEST OF DES MOINES...AND 10 MILES NORTHWEST OF OTTUMWA. THESE STORMS WERE PRODUCING EXTREMELY HEAVY RAIN...NEARLY CONTINUOUS LIGHTNING...AND PEA TO MARBLE SIZE HAIL...AND POSSIBLY DAMAGING WIND. THE VERY HEAVY RAINS COULD ALSO CAUSE FLOODING OF SOME STREAMS...AS WELL AS URBAN STREETS AND LOW LYING AREAS. / THE STORMS AND SHOWERS WERE MOVING EAST AT 25 MILES AN HOUR. THE OUTLOOK OVER THE NEXT ONE TO TWO HOURS IS FOR CONTINUED STRONG STORMS AND SHOWERS TO COVER THE SOUTH THIRD OF IOWA. MILLER
Special weather statement, Sep 14, 9:44 PM CDT, 1 hour 23 minutes before
IAZALL-150345- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 945 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 930 PM...ISOLATED VERY STRONG THUNDERTORMS AND SCATTERED STRONG THUNDERSTORMS CONTINUED OVER SOUTHWEST...SOUTH CENTRAL...AND SOUTHEAST IOWA. THE STRONGEST OF THESE STORMS WAS LOCATED NEAR ANITA...50 MILES WEST OF DES MOINES...BETWEEN CRESTON AND CUMBERLAND OR 50 MILES SOUTHWEST OF DES MOINES...AND 40 MILES SOUTH OF DES MOINES BETWEEN AFTON AND OSCEOLA. THESE STORMS WERE PRODUCING EXTREMELY HEAVY RAIN...NEARLY CONTINUOUS LIGHTNING...AND PEA TO MARBLE SIZE HAIL...AND COULD PRODUCE DAMAGING WIND. THE HEAVY RAIN COUILD 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 THIRD TO ONE HALF OF IOWA. THE RAIN WAS SOUTH OF A LINE FROM DENISON TO CEDAR RAPIDS TO DAVENPORT. DENISON IS 50 MILES NORTHEAST OF COUNCIL BLUFFS. THE STORMS AND SHOWERS WERE MOVING EAST AT 25 MILES AN HOUR. MILLER
Special weather statement, Sep 14, 10:42 PM CDT, 25 minutes before
IAZALL-150445- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1041 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 1030 PM...SCATTERED STRONG AND VERY STRONG THUNDERTORMS WERE OVER WEST CENTRAL...SOUTHWEST...AND SOUTH CENTRAL IOWA. THE STRONGEST OF THESE STORMS WAS LOCATED 35 MILES SOUTHWEST OF DES MOINES NEAR AFTON... AND FROM 35 TO 50 MILES SOUTH OF DES MOINES...OR FROM OSCEOLA TO NEAR LEON. THESE STORMS WERE PRODUCING EXTREMELY HEAVY RAIN...NEARLY CONTINUOUS LIGHTNING...AND PEA TO MARBLE SIZE HAIL...AND COULD PRODUCE DAMAGING WIND. THE HEAVY RAIN COUILD 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 SOUTH HAL~F OF IOWA. THE RAIN WAS SOUTH OF A LINE FROM NEAR SIOUX CITY TO CEDAR RAPIDS TO DAVENORT. THE STORMS AND SHOWERS WERE MOVING EAST AT 25 MILES AN HOUR. MILLER/KALLMAN
Special weather statement, Sep 14, 10:48 PM CDT, 19 minutes before
IAZALL-150445- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY...CORRECTED SPELLING... NATIONAL WEATHER SERVICE DES MOINES IA 1041 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 1030 PM...SCATTERED STRONG AND VERY STRONG THUNDERTORMS WERE OVER WEST CENTRAL...SOUTHWEST...AND SOUTH CENTRAL IOWA. THE STRONGEST OF THESE STORMS WAS LOCATED 35 MILES SOUTHWEST OF DES MOINES NEAR AFTON... AND FROM 35 TO 50 MILES SOUTH OF DES MOINES...OR FROM OSCEOLA TO NEAR LEON. THESE STORMS WERE PRODUCING EXTREMELY HEAVY RAIN...NEARLY CONTINUOUS LIGHTNING...AND PEA TO MARBLE SIZE HAIL...AND COULD PRODUCE DAMAGING WIND. THE HEAVY RAIN COULD 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 SOUTH HALF OF IOWA. THE RAIN WAS SOUTH OF A LINE FROM NEAR SIOUX CITY TO CEDAR RAPIDS TO DAVENPORT. THE STORMS AND SHOWERS WERE MOVING EAST AT 25 MILES AN HOUR. MILLER/KALLMAN
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, 8:00 PM CDT | Severe Thunderstorm Warning | DMX | Union | 45 min |
| 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
Flash Flood Warnings in Iowa, 1992Every flash flood 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.