Alert archive / Iowa / Flash Flood Warnings in 1993
Flash Flood Warning 92, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Aug 9, 1993, 10:40 PM CDT for Chickasaw County, Iowa. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Aug 9, 1993, 10:40 PM CDT (03:40 UTC)
- Expired
- Aug 10, 1993, 1:00 AM CDT
- In force
- 2 hr
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Chickasaw County, IA
The nearest sounding before it
Minneapolis, MN (KSTC), launched 00:00Z, 3.7 hours before the alert went out and 224 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
- 490 J/kg
- Mixed-layer CIN
- -81 J/kg
- Mixed-layer LCL
- 1739 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 94 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KALO 100338 FFWALO IAC037-100600- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE WATERLOO IA 1040 PM CDT MON AUG 9 1993 THE NATIONAL WEATHER SERVICE IN WATERLOO HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 100 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHEAST IOWA ...SOUTHERN CHICKASAW COUNTY AT 1030 PM OFFICIALS FROM CHICKASAW COUNTY WERE INDICATING THAT FLASH FLOODING IS AND WILL BE OCCURRING ALONG THE PLUM CREEK NEAR FREDERICKSBURG AND IN THE FARMLANDS ALONG THE WAPSIPINICON RIVER. RADAR SHOWED THAT THE RAIN HAD CLEARED THE COUNTY...HOWEVER THE 3 TO 4 INCHES OF RAIN THAT OCCURRED EARLIER THIS EVENING IN THE NEW HAMPTON AREA...IS MOVING DOWNSTREAM AND WILL LIKELY ENHANCE FLASH FLOOD POTENTIAL ALONG THE AFOREMENTIONED WATERWAYS. PEOPLE IN THE FREDERICKSBURG AREA LIVING ALONG THE PLUM CREEK SHOULD MOVE TO HIGHER GROUNDS AS FLASH FLOODING OCCURS. DO NOT STAY IN AREAS SUBJECT TO FLOODxING WHEN WATER BEGINS RISING. ACT QUICKLY. MOVE UP TO ESCAPE FLOOD WATERS. IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS AT NIGHT. COLLAR &
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, Aug 9, 8:40 PM CDT, 2 hours before
IAZALL-100240- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 840 PM CDT MON AUG 9 1993 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR MUCH OF THE NORTHERN HALF OF IOWA UNTIL 10 PM THIS EVENING... AT 830 PM CDT...INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN AND HAIL WERE LOCATED OVER NORTH CENTRAL AND NORTHEAST IOWA...AND DEVELOPING IN NORTH WEST IOWA. THESE THUNDERSTORMS WERE LOCATED NORTH OF A LINE EXTENDING FROM SIOUX CITY TO DAVENPORT. THE HEAVIEST THUNDERSTORMS IN NORTH CENTRAL IOWA WERE LOCATED ALONG A LINE EXTENDING FROM BELMOND...25 MILES SOUTHWEST OF MASON CITY...TO CHARLES CITY...30 MILES EAST OF MASON CITY. VERY HEAVY RAINS...WINDS IN EXCESS OF 40 MILES AN HOUR...AND HAIL MAY BE EXPECTED WITH THE PASSAGE OF THESE THUNDERSTORMS. THE THUNDERSTORMS WERE MOVING SOUTHEAST AT 35 MILES AN HOUR. SCOTT
Special weather statement, Aug 9, 8:54 PM CDT, 1 hour 46 minutes before
IAZALL-100240- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 840 PM CDT MON AUG 9 1993 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR MUCH OF THE NORTHERN HALF OF IOWA UNTIL 10 PM THIS EVENING... AT 830 PM CDT...INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN AND HAIL WERE LOCATED OVER NORTH CENTRAL AND NORTHEAST IOWA...AND DEVELOPING IN NORTH WEST IOWA. THESE THUNDERSTORMS WERE LOCATED NORTH OF A LINE EXTENDING FROM SIOUX CITY TO DAVENPORT. THE HEAVIEST THUNDERSTORMS IN NORTH CENTRAL IOWA WERE LOCATED ALONG A LINE EXTENDING FROM BELMOND...25 MILES SOUTHWEST OF MASON CITY...TO CHARLES CITY...30 MILES EAST OF MASON CITY. VERY HEAVY RAINS...WINDS IN E(XCESS OF 40 MILES AN HOUR...AND HAIL MAY BE EXPECTED WITH THE PASSAGE OF THESE THUNDERSTORMS. THE THUNDERSTORMS WERE MOVING SOUTHEAST AT 35 MILES AN HOUR. SCOTT
Special weather statement, Aug 9, 9:35 PM CDT, 1 hour 5 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-100330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 935 PM CDT MON AUG 9 1993 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PARTS OF NORTHEAST IOWA ALONG THE HIGHWAY 20 CORRIDOR UNTIL 3AM CDT... AT 935 PM CDT THUNDERSTORMS CONTINUED ACROSS MUCH OF NORTH CENTRAL AND NORTHEAST IOWA. THESE THUNDERSTORMS WERE MOVING SOUTHEAST AT 25 MILES AN HOUR. THEY WILL AFFECT JUST ABOUT ALL CITIES AND TOWNS SOUTH OF HIGHWAY 18...WATERLOO...GRUNDY CENTER...PARKERSBURG...NEW HAMPTON... OELWEIN AND CHARLES CITY. THESE THUNDERSTORMS COULD CAUSE SOME URBAN AND SMALL STREAM FLOODING FROM VERY HEAVY RAINS ALONG WITH GUSTY WINDS...LIGHTNING AND HAIL. PEOPLE IN NORTHEAST AND NORTH CENTRAL IOWA SHOULD CONTINUE TO MONITOR THE WEATHER THIS EVENING AND LISTEN TO NOAA WEATHER RADIO...TV AND RADIO FOR LATER UPDATES AND STATEMENTS. A FLASH FLOOD WARNING IS IN EFFECT UNTIL 11 PM CDT FOR CHICKASAW COUNTY WHICH IS ABOUT 30 MILES NORTH OF WATERLOO. ROBB
Special weather statement, Aug 9, 9:43 PM CDT, 57 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-100330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 935 PM CDT MON AUG 9 1993 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PARTS OF NORTHEAST IOWA ALONG THE HIGHWAY 20 CORRIDOR UNTIL 3AM CDT... AT 935 PM CDT THUNDERSTORMS CONTINUED ACROSS MUCH OF NORTH CENTRAL AND NORTHEAST IOWA. THESE THUNDERSTORMS WERE MOVING SOUTHEAST AT 25 MILES AN HOUR. THEY WILL AFFECT JUST ABOUT ALL CITIES AND TOWNS SOUTH OF HIGHWAY 18...WATERLOO...GRUNDY CENTER...PARKERSBURG...NEW HAMPTON... OELWEIN AND CHARLES CITY. THESE THUNDERSTORMS COULD CAUSE SOME URBAN AND SMALL STREAM FLOODING FROM VERY HEAVY RAINS ALONG WITH GUSTY WINDS...LIGHTNING AND HAIL. PEOPLE IN NORTHEAST AND NORTH CENTRAL IOWA SHOULD CONTINUE TO MONITOR THE WEATHER THIS EVENING AND LISTEN TO NOAA WEATHER RADIO...TV AND RADIO FOR LATER UPDATES AND STATEMENTS. A FLASH FLOOD WARNING IS IN EFFECT. UNTIL 11 PM CDT FOR CHICKASAW COUNTY WHICH IS ABOUT 30 MILES NORTH OF WATERLOO. ROBB
Special weather statement, Aug 9, 9:45 PM CDT, 55 minutes before
IAZALL-100340- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 945 PM CDT MON AUG 9 1993 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR CENTRAL AND EASTERN IOWA UNTIL 3AM... AT 930 PM CDT...INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN AND HAIL WERE LOCATED OVER NORTHWEST...NORTHCENTRAL AND EAST CENTRAL IOWA. THE MOST INTENSE THUNDERSTORMS WITH THE HEAVIEST RAINS AND SOME HAIL WERE LOCATED ALONG A NARROW LINE...ABOUT 15 MILES WIDE...AND EXTENDING FROM JUST NORTH OF STORM LAKE...THROUGH IOWA FALLS TO CEDAR RAPIDS. VERY HEAVY RAINS ...STRONG GUSTY WINDS AND HAIL CAN BE EXPECTED WITH THESE STORMS. OTHER SHOWERS AND THUNDERSTORMS WERE LOCATED NORTH OF THIS LINE...EXTENDING NORTH TO NEAR THE MINNESOTA BORDER...AND EAST INTO ADJACENT PARTS OF NORTHWEST ILLINOIS AND SOUTHWEST WISCONSIN. THE STORMS WERE MOVING TO THE SOUTHEAST AT 35 MILES AN HOUR. SCOTT
Special weather statement, Aug 9, 10:00 PM CDT, 40 minutes before
IAZALL-100340- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 945 PM CDT MON AUG 9 1993 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR CENTRAL AND EASTERN IOWA UNTIL 3AM... AT 930 PM CDT...INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN AND HAIL WERE LOCATED OVER NORTHWEST...NORTHCENTRAL AND EAST CENTRAL IOWA. THE MOST INTENSE THUNDERSTORMS WITH THE HEAVIEST RAINS AND SOME HAIL WERE LOCATED ALONG A NARROW LINE...ABOUT 15 MILES WIDE...AND EXTENDING FROM JUST NORTH OF STORM LAKE...THROUGH IOWA FALLS TO CEDAR RAPIDS. VERY HEAVY RAINS ...STRONG GUSTY WINDS AND HAIL CAN BE EXPECTED WITH THESE STORMS. OTHER SHOWERS AND THUNDERSTORMS WERE LOCATED NORTH OF TnHIS LINE...EXTENDING NORTH TO NEAR THE MINNESOTA BORDER...AND EAST INTO ADJACENT PARTS OF NORTHWEST ILLINOIS AND SOUTHWEST WISCONSIN. THE STORMS WERE MOVING TO THE SOUTHEAST AT 35 MILES AN HOUR. SCOTT
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 7:05 PM CDT | Severe Thunderstorm Warning | DMX | Worth | 33 min |
| Aug 9, 7:35 PM CDT | Severe Thunderstorm Warning | DMX | Buchanan | 55 min |
| Aug 9, 8:00 PM CDT | Flash Flood Warning | DMX | Chickasaw | 3 hr |
| Aug 9, 8:33 PM CDT | Severe Thunderstorm Warning | DMX | Linn | 42 min |
| Aug 9, 8:40 PM CDT | Severe Thunderstorm Warning | DMX | Butler | 50 min |
| Aug 9, 10:48 PM CDT | Flash Flood Warning | DMX | Linn | 4 hr |
| Aug 9, 11:19 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun | 26 min |
| Aug 9, 11:19 PM CDT | Severe Thunderstorm Warning | DMX | Greene | 41 min |
| Aug 9, 11:31 PM CDT | Flash Flood Warning | DMX | Iowa | 3 hr |
Nearby
Flash Flood Warnings in Iowa, 1993Every flash flood warning in 1993
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.