Alert archive / Iowa / Flash Flood Warnings in 1993
Flash Flood Warning 52, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Jul 8, 1993, 8:27 PM CDT for Carroll County, Crawford County, Greene County, Iowa. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Jul 8, 1993, 8:27 PM CDT (01:27 UTC)
- Expired
- Jul 9, 1993, 12:30 AM CDT
- In force
- 4 hr
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Carroll County, IA, Crawford County, IA, Greene County, IA
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 1.5 hours before the alert went out and 147 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
- 3257 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 692 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 244 m²/s²
- 0-3 km storm-relative helicity
- 341 m²/s²
- Significant tornado parameter
- 6.3
- Supercell composite
- 27.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KDSM 090127 FFWDSM IAC027-047-073-090530- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DES MOINES IA 827 PM CDT THU JUL 8 1993 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 1230 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATION(S)S... IN WEST CENTRAL IOWA ...CARROLL COUNTY...CRAWFORD COUNTY...GREENE COUNTY AT 819 PM CDT...REPORTS OF FLOODING WERE WIDESPREAD ACROSS CRAWFORD COUNTY. A BRIDGE WEST OF MANILLA ON HIGHWAY 141 WAS UNDER WATER...MANILLA IS ABOUT 55 MILES NORTHEAST OF OMAHA. ALSO...CRAWFORD COUNTY SHERIFF REPORTED THAT HIGHWAY 59 AND HIGHWAY 141 SOUTH OF DENISON WERE CLOSED. AN UNOFFICIAL REPORT OF 2.4 INCHES OF RAIN FELL AT DELOIT. THE STORMS CONTINUE TO BUILD ACROSS CRAWFORD COUNTY. THESE STORMS ARE NOW COVERING MUCH OF CARROLL AND GREEN COUTIES AS WELL. EXTREMELY HEAVY RAINS ARE FALLING IN THESE AREAS NOW. R A PRENTICE MOST DEATHS IN FLASH FLOODING OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. &
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, Jul 8, 7:09 PM CDT, 1 hour 18 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-090115- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 710 PM CDT THU JUL 8 1993 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL MIDNIGHT... AT 705 PM...STRONG THUNDERSTORMS CONTINUE TO DEVELOP IN NORTHEAST AND NORTH CENTRAL IOWA. THESE THUNDERSTORMS WERE SCATTERED FROM 25 MILES SOUTHEAST OF MASON CITY NEAR MARBLE ROCK...TO CHARLES CITY...TO OELWEIN. MOVEMENT WAS TO THE NORTHEAST AT 35 MILES AN HOUR AND WILL AFFECT THE TOWNS OF MARBLE ROCK...CHARLES CITY...SUMNER...AND WEST UNION. A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL MIDNIGHT. CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORM DEVELOPMENT TONIGHT AND PERSONS IN THE WATCH AREA ARE ADVISED TO REMAIN ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS. STAY TUNED TO YOUR TELEVISION...RADIO...OR NOAA WEATHER RADIO FOR FURTHER UPDATES AND POSSIBLE WARNINGS. LINDENBERG
Special weather statement, Jul 8, 7:10 PM CDT, 1 hour 17 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-090115- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 710 PM CDT THU JUL 8 1993 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL MIDNIGHT... AT 705 PM...STRONG THUNDERSTORMS CONTINUE TO DEVELOP IN NORTHEAST AND NORTH CENTRAL IOWA. THESE THUNDERSTORMS WERE SCATTERED FROM 25 MILES SOUTHEAST OF MASON CITY NEAR MARBLE ROCK...TO CHARLES CITY...TO OELWEIN. MOVEMENT WAS TO THE NORTHEAST AT 35 MILES AN HOUR AND WILL AFFECT THE TOWNS OF MARBLE ROCK...CHARLES CITY...SUMNER...AND WEST UNION. A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL MIDNIGHT. CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORM DEVELOPMENT TONIGHT AND PERSONS IN THE WATCH AREA ARE ADVISED TO REMAIN ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS. STAY TUNED TO YOUR TELEVISION...RADIO...OR NOAA WEATHER RADIO FOR FURTHER UPDATES AND POSSIBLE WARNINGS. LINDENBERG
Special weather statement, Jul 8, 7:40 PM CDT, 47 minutes before
IAZALL-090140- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 740 PM CDT THU JUL 8 1993 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR NORTH CENTRAL AND WESTERN IOWA UNTIL MIDNIGHT... AT 732 PM CDT...ISOLATED VERY STRONG THUNDERSTORMS WERE OCCURRING FROM WEST CENTRAL INTO NORTH CENTRAL IOWA. THE STRONGEST STORMS WERE LOCATED IN A 30 MILE WIDE BAND CENTERED FROM 15 MILES SOUTHWEST OF DENISON...OR 40 MILES SOUTHEAST OF SIOUX CITY...TO 30 MILES SOUTHWEST OF MASON CITY NEAR LUVERNE. THESE STORMS WERE PRODUCING TORRENTIAL RAINFALL...HAIL AND GUSTY WINDS. THE THUNDERSTORMS WERE PART OF AN AREA OF SCATTERED SHOWERS AND STORMS THAT WERE OCCURRING NORTH OF A LINE FROM COUNCIL BLUFFS TO WATERLOO. ISOLATED STORMS AND SHOWERS WERE ALSO IN SOUTHWEST IOWA...SOUTHWEST OF A COUNCIL BLUFFS TO LAMONI LINE. / THE STORMS AND SHOWERS WERE MOVING EAST AT 30 TO 35 MILES AN HOUR. KALLMAN
Special weather statement, Jul 8, 7:40 PM CDT, 47 minutes before
IAZALL-090140- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 740 PM CDT THU JUL 8 1993 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR NORTH CENTRAL AND WESTERN IOWA UNTIL MIDNIGHT... AT 732 PM CDT...ISOLATED VERY STRONG THUNDERSTORMS WERE OCCURRING FROM WEST CENTRAL INTO NORTH CENTRAL IOWA. THE STRONGEST STORMS WERE LOCATED IN A 30 MILE WIDE BAND CENTERED FROM 15 MILES SOUTHWEST OF DENISON...OR 40 MILES SOUTHEAST OF SIOUX CITY...TO 30 MILES SOUTHWEST OF MASON CITY NEAR LUVERNE. THESE STORMS WERE PRODUCING TORRENTIAL RAINFALL...HAIL AND GUSTY WINDS. THE THUNDERSTORMS WERE PART OF AN AREA OF SCATTERED SHOWERS AND STORMS THAT WERE OCCURRING NORTH OF A LINE FROM COUNCIL BLUFFS TO WATERLOO. ISOLATED STORMS AND SHOWERS WERE ALSO IN SOUTHWEST IOWA...SOUTHWEST OF A COUNCIL BLUFFS TO LAMONI LINE. / THE STORMS AND SHOWERS WERE MOVING EAST AT 30 TO 35 MILES AN HOUR. KALLMAN
Special weather statement, Jul 8, 8:05 PM CDT, 22 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-090215- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 805 PM CDT THU JUL 8 1993 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL MIDNIGHT... AT 800 PM...STRONG THUNDERSTORMS WERE CONTINUING ACROSS PORTIONS OF NORTHEAST AND NORTH CENTRAL IOWA. THESE THUNDERSTORMS WERE PRODUCING VERY HEAVY RAINS...DEADLY LIGHTNING...STRONG GUSTY WINDS...AND POSSIBLE SMALL HAIL. THESE THUNDERSTORMS WERE IN A LINE THAT EXTENDED FROM 25 MILES SOUTH OF MASON CITY...TO DUMONT...TO WAVERLY...TO WEST UNION. MOVEMENT WAS TO THE NORTHEAST AT 35 MILES AN HOUR AND WILL BE AFFECTING THE TOWNS OF SHEFFIELD...MARBLE ROCK...CLARKSVILLE...WAVERLY... WEST UNION...AND CHARLES CITY. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT FOR NORTH CENTRAL AND PORTIONS OF NORTHEAST IOWA. ATMOSPHERIC CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS TO DEVELOP WITHIN THIS WATCH AREA. PERSONS WITHIN THE WATCH AREA SHOULD REMAIN ALERT FOR ANY CHANGES IN THE WEATHER AND BE PREPARED TO TAKE ACTION IF A WARNING IS ISSUED. STAY TUNED TO YOUR TELEVISION...RADIO...OR NOAA WEATHER RADIO FOR FURTHER UPDATES AND POSSIBLE WARNINGS. LINDENBERG
Special weather statement, Jul 8, 8:07 PM CDT, 20 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-090215- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 805 PM CDT THU JUL 8 1993 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL MIDNIGHT... AT 800 PM...STRONG THUNDERSTORMS WERE CONTINUING ACROSS PORTIONS OF NORTHEAST AND NORTH CENTRAL IOWA. THESE THUNDERSTORMS WERE PRODUCING VERY HEAVY RAINS...DEADLY LIGHTNING...STRONG GUSTY WINDS...AND POSSIBLE SMALL HAIL. THESE THUNDERSTORMS WERE IN A LINE THAT EXTENDED FROM 25 MILES SOUTH OF MASON CITY...TO DUMONT...TO WAVERLY...TO WEST UNION. MOVEMENT WAS TO THE NORTHEAST AT 35 MILES AN HOUR AND WILL BE AFFECTING THE TOWNS OF SHEFFIELD...MARBLE ROCK...CLARKSVILLE...WAVERLY... WEST UNION...AND CHARLES CITY. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT FOR NORTH CENTRAL AND PORTIONS OF NORTHEAST IOWA. ATMOSPHERIC CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS TO DEVELOP WITHIN THIS WATCH AREA. PERSONS WITHIN THE WATCH AREA SHOULD REMAIN ALERT FOR ANY CHANGES IN THE WEATHER AND BE PREPARED TO TAKE ACTION IF A WARNING IS ISSUED. STAY TUNED TO YOUR TELEVISION...RADIO...OR NOAA WEATHER RADIO FOR FURTHER UPDATES AND POSSIBLE WARNINGS. LINDENBERG
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 7:12 PM CDT | Severe Thunderstorm Warning | DMX | Crawford | 43 min |
| Jul 8, 7:12 PM CDT | Severe Thunderstorm Warning | DMX | Carroll | 48 min |
| Jul 8, 8:05 PM CDT | Severe Thunderstorm Warning | DMX | Carroll, Greene, Guthrie | 55 min |
| Jul 8, 8:57 PM CDT | Tornado Warning | DMX | Carroll, Crawford | 19 min |
| Jul 8, 9:09 PM CDT | Tornado Warning | DMX | Boone | 36 min |
| Jul 8, 9:29 PM CDT | Flash Flood Warning | DMX | Boone, Story | 4 hr |
| Jul 8, 9:29 PM CDT | Flash Flood Warning | DMX | Dallas, Guthrie | 4 hr |
| Jul 8, 9:31 PM CDT | Tornado Warning | DMX | Chickasaw | 29 min |
| Jul 8, 9:52 PM CDT | Tornado Warning | DMX | Boone, Dallas | 38 min |
| Jul 8, 10:03 PM CDT | Tornado Warning | DMX | Dallas, Polk | 27 min |
| Jul 8, 10:47 PM CDT | Flash Flood Warning | DMX | Black Hawk | 3 hr |
| Jul 8, 10:52 PM CDT | Severe Thunderstorm Warning | DMX | Buchanan | 20 min |
| Jul 8, 11:25 PM CDT | Flash Flood Warning | DMX | Jasper, Polk | 5 hr |
| Jul 8, 11:25 PM CDT | Flash Flood Warning | DMX | Marshall | 5 hr |
| Jul 8, 11:40 PM CDT | Severe Thunderstorm Warning | DMX | Audubon, Carroll, Crawford | 35 min |
| Jul 8, 11:40 PM CDT | Severe Thunderstorm Warning | DMX | Adams, Cass, Taylor | 35 min |
| Jul 8, 11:49 PM CDT | Flash Flood Warning | DMX | Buchanan | 3 hr |
| Jul 9, 12:02 AM CDT | Severe Thunderstorm Warning | DMX | Adair, Ringgold, Union | 28 min |
| Jul 9, 12:02 AM CDT | Severe Thunderstorm Warning | DMX | Greene, Guthrie | 28 min |
| Jul 9, 12:22 AM CDT | Flash Flood Warning | DMX | Carroll, Greene | 4 hr |
| Jul 9, 12:22 AM CDT | Flash Flood Warning | DMX | Audubon | 4 hr |
| Jul 9, 12:33 AM CDT | Severe Thunderstorm Warning | DMX | Dallas, Madison, Polk, Warren | 27 min |
| Jul 9, 12:33 AM CDT | Severe Thunderstorm Warning | DMX | Clarke, Decatur | 27 min |
| Jul 9, 1:01 AM CDT | Flash Flood Warning | DMX | Black Hawk | 119 min |
| Jul 9, 1:05 AM CDT | Severe Thunderstorm Warning | DMX | Clarke, Decatur, Lucas, Wayne | 25 min |
| Jul 9, 1:05 AM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marion, Polk | 25 min |
| Jul 9, 1:05 AM CDT | Severe Thunderstorm Warning | DMX | Warren | 25 min |
| Jul 9, 1:22 AM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 23 min |
| Jul 9, 1:36 AM CDT | Severe Thunderstorm Warning | DMX | Mahaska, Poweshiek | 54 min |
| Jul 9, 1:36 AM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Davis, Monroe, Wapello | 54 min |
| Jul 9, 1:36 AM CDT | Severe Thunderstorm Warning | DMX | Jasper | 49 min |
| Jul 9, 2:11 AM CDT | Severe Thunderstorm Warning | DMX | Jefferson, Keokuk, Van Buren, Washington | 49 min |
| Jul 9, 2:11 AM CDT | Severe Thunderstorm Warning | DMX | Iowa, Johnson | 49 min |
| Jul 9, 10:21 AM CDT | Flash Flood Warning | DMX | Story | 6 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.