Alert archive / Iowa / Flash Flood Warnings in 1993
Flash Flood Warning 113, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Aug 19, 1993, 1:24 AM CDT for Clarke County, Lucas County, Union County, Iowa. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Aug 19, 1993, 1:24 AM CDT (06:24 UTC)
- Expired
- Aug 19, 1993, 5:30 AM CDT
- In force
- 4 hr
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Clarke County, IA, Lucas County, IA, Union County, IA
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 6.4 hours before the alert went out and 219 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
- 63 J/kg
- Mixed-layer CIN
- -362 J/kg
- Mixed-layer LCL
- 1510 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 149 m²/s²
- 0-3 km storm-relative helicity
- 293 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KDSM 190624 FFWDSM IAC039-117-175-191030- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DES MOINES IA 124 AM CDT THU AUG 19 1993 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 530 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATION(S)S... IN SOUTH CENTRAL IOWA ...CLARKE COUNTY...LUCAS COUNTY...UNION COUNTY AT 115 AM...DES MOINES RADAR CONTINUED TO SHOW INTENSE THUNDERSTORMS OCCURRING OVER SOUTHERN IOWA...EXTENDING FROM JUST WEST OF CRESTON TO NEAR CHARITON. THE THUNDERSTORMS CONTINUE TO DEVELOP AND MOVE OVER THE SAME LOCATION PRODUCING ADDITIONAL HEAVY RAINFALL. SOME OF THE RIVERS THAT WILL BE AFFECTED FROM UNION COUNTY INCLUDE... THE THOMPSON RIVER AND ITS TRIBUTARIES...AND FROM CLARKE AND LUCAS COUNTIES...THE OTTER AND WHITEBREAST CREEKS. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODIN^G IS OBSERVED...ACT QUICKLY. MOVE UP TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. SMITH/JOHNSON
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 18, 9:15 PM CDT, 4 hours 9 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-190400- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 915 PM CDT WED AUG 18 1993 ...A FLASH FLOOD WATCH CONTINUES NORTHEAST AND NORTH CENTRAL IOWA... AT 910 PM RADAR INDICATED SCATTERED SHOWERS CONTINUING ACROSS THOSE AREAS OF NORTHEAST IOWA TO THE EAST OF HIGHWAY 150. THROUGH 11 PM CDT...THESE SHOWERS WILL SLOWLY TAPER OFF. HOWEVER...SHOWERS AND THUNDERSTORMS ARE EXPECTED TO REDEVELOP ACROSS NORTH CENTRAL AND NORTHEAST IOWA THROUGH THE NIGHTTIME HOURS. THESE THUNDERSTORMS COULD PRODUCE VERY HEAVY RAINS THROUGH THE NIGHT. DUE TO THE POTENTIAL FOR HEAVY RAINS THROUGH THE EVENING HOURS...THE FLASH FLOOD WATCH CONTINUES FOR ALL OF NORTHEAST AND NORTH CENTRAL IOWA THROUGH THE REST OF TONIGHT. THE PUBLIC SHOULD STAY TUNED TO NOAA WEATHER RADIO OR LOCAL RADIO AND TELEVISION BROADCASTS FOR ADDITIONAL WEATHER UPDATES AND POSSIBLE WARNINGS. PEOPLE WHO LIVE NEAR FLOOD PRONE AREAS SHOULD KEEP A CLOSE EYE TO THE WEATHER AND SHOULD BE PREPARED TO MOVE TO HIGHER GROUND SHOULD HEAVY RAINS OCCUR OR WATER LEVELS BEGIN RISING. TRS
Special weather statement, Aug 18, 9:18 PM CDT, 4 hours 6 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-190400- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 915 PM CDT WED AUG 18 1993 ...A FLASH FLOOD WATCH CONTINUES NORTHEAST AND NORTH CENTRAL IOWA... AT 910 PM RADAR INDICATED SCATTERED SHOWERS CONTINUING ACROSS THOSE AREAS OF NORTHEAST IOWA TO THE EAST OF HIGHWAY 150. THROUGH 11 PM CDT...THESE SHOWERS WILL SLOWLY TAPER OFF. HOWEVER...SHOWERS AND THUNDERSTORMS ARE EXPECTED TO REDEVELOP ACROSS NORTH CENTRAL AND NORTHEAST IOWA THROUGH THE NIGHTTIME HOURS. THESE THUNDERSTORMS COULD PRODUCE VERY HEAVY RAINS THROUGH THE NIGHT. DUE TO THE POTENTIAL FOR HEAVY RAINS THROUGH THE EVENING HOURS...THE FLASH FLOOD WATCH CONTINUES FOR ALL OF NORTHEAST AND NORTH CENTRAL IOWA THROUGH THE REST OF TONIGHT. THE PUBLIC SHOULD STAY TUNED TO NOAA WEATHER RADIO OR LOCAL RADIO AND TELEVISION BROADCASTS FOR ADDITIONAL WEATHER UPDATES AND POSSIBLE WARNINGS. PEOPLE WHO LIVE NEAR FLOOD PRONE AREAS SHOULD KEEP A CLOSE EYE TO THE WEATHER AND SHOULD BE PREPARED TO MOVE TO HIGHER GROUND SHOULD HEAVY RAINS OCCUR OR WATER LEVELS BEGIN RISING. TRS
Special weather statement, Aug 18, 9:20 PM CDT, 4 hours 4 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-190400- SPECIAL WEATHER STATEMENT...CORRECTION FOR TEXT NATIONAL WEATHER SERVICE WATERLOO IA 915 PM CDT WED AUG 18 1993 ...A FLASH FLOOD WATCH CONTINUES FOR NORTHEAST AND NORTH CENTRAL IOWA... AT 910 PM RADAR INDICATED SCATTERED SHOWERS CONTINUING ACROSS THOSE AREAS OF NORTHEAST IOWA TO THE EAST OF HIGHWAY 150. THROUGH 11 PM CDT...THESE SHOWERS WILL SLOWLY TAPER OFF. HOWEVER...SHOWERS AND THUNDERSTORMS ARE EXPECTED TO REDEVELOP ACROSS NORTH CENTRAL AND NORTHEAST IOWA THROUGH THE NIGHTTIME HOURS. THESE THUNDERSTORMS COULD PRODUCE VERY HEAVY RAINS THROUGH THE NIGHT. DUE TO THE POTENTIAL FOR HEAVY RAINS THROUGH THE NIGHTTIME HOURS...THE FLASH FLOOD WATCH CONTINUES FOR ALL OF NORTHEAST AND NORTH CENTRAL IOWA THROUGH THE REST OF TONIGHT. THE PUBLIC SHOULD STAY TUNED TO NOAA WEATHER RADIO OR LOCAL RADIO AND TELEVISION BROADCASTS FOR ADDITIONAL WEATHER UPDATES AND POSSIBLE WARNINGS. PEOPLE WHO LIVE NEAR FLOOD PRONE AREAS SHOULD KEEP A CLOSE EYE TO THE WEATHER AND SHOULD BE PREPARED TO MOVE TO HIGHER GROUND SHOULD HEAVY RAINS OCCUR OR WATER LEVELS BEGIN RISING. TRS
Special weather statement, Aug 18, 10:43 PM CDT, 2 hours 41 minutes before
IAZALL-190445- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1043 PM CDT WED AUG 18 1993 ...A FLASH FLOOD WATCH IS IN EFFECT FOR THE SOUTHERN QUARTER OF IOWA TONIGHT... AT 1030 PM CDT...ISOLATED STRONG THUNDERSTORMS CONTAINING HEAVY RAIN HAD REDEVELOPED OVER CENTRAL IOWA. THE STORMS WERE LOCATED 25 MILES SOUTH OF DES MOINES NEAR NEW VIRGINIA AND 30 MILES SOUTHEAST OF DES MOINES BETWEEN MELCHER AND KNOXVILLE. ANOTHER STRONG STORM WAS IN SOUTHEAST IOWA...10 MILES NORTHEAST OF OTTUMWA. THE STORMS WERE PART OF AN AREA OF SHOWERS AND THUNDERSTORMS OCCURRING SOUTH AND EAST OF A LINE FROM AFTON...WHICH IS 40 MILES SOUTHWEST OF DES MOINES...TO CEDAR RAPIDS. MOVEMENT OF THE STORMS AND SHOWERS WAS EAST AT 30 TO 35 MILES AN HOUR. ANOTHER AREA OF SHOWERS AND STORMS WAS ENTERING SOUTHWEST IOWA...40 MILES SOUTHEAST OF COUNCIL BLUFFS NEAR SIDNEY AND SHENANDOAH. THESE STORMS AND SHOWERS WERE MOVING EAST AT 20 TO 25 MILES AN HOUR. KALLMAN
Special weather statement, Aug 18, 11:43 PM CDT, 1 hour 41 minutes before
IAZALL-190545- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1143 PM CDT WED AUG 18 1993 ...A FLASH FLOOD WATCH IS IN EFFECT FOR THE SOUTHERN QUARTER OF IOWA TONIGHT... AT 1130 PM CDT...STRONG THUNDERSTORMS PRODUCING VERY HEAVY RAIN CONTINUED TO DEVELOP ACROSS CENTRAL AND SOUTH CENTRAL IOWA. THE STORMS WERE OCCURRING IN A BAND 15 MILES WIDE AND EXTENDING FROM 30 MILES NORTH OF OTTUMWA NEAR MONTEZUMA TO 45 MILES SOUTHWEST OF DES MOINES NEAR CRESTON. THESE STRONG STORMS WERE LOCATED IN A 40 MILE WIDE AREA OF SHOWERS AND THUNDERSTORMS LOCATED OVER THE SOUTH THIRD OF IOWA...AND CENTERED FROM 60 MILES SOUTHWEST OF DES MOINES NEAR CORNING...TO 20 MILES SOUTHWEST OF DAVENPORT NEAR MUSCATINE. THE SHOWERS AND STORMS WERE MOVING EAST AT 25 TO 30 MILES AN HOUR. KALLMAN
Special weather statement, Aug 19, 12:35 AM CDT, 49 minutes before
IAZALL-190645- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1235 AM CDT THU AUG 19 1993 ...A FLASH FLOOD WATCH IS IN EFFECT FOR THE SOUTHERN QUARTER OF IOWA THIS MORNING... AT 1226 PM CDT...STRONG THUNDERSTORMS PRODUCING VERY HEAVY RAIN... FREQUENT DANGEROUS LIGHTNING AND POSSIBLY SOME SMALL HAIL CONTINUED OVER SOUTHWEST INTO EAST CENTRAL IOWA. THE STORMS WERE IN A 30 MILE WIDE AREA CENTERED FROM 50 MILES SOUTHWEST OF DES MOINES...NEAR CRESTON TO 25 MILES SOUTHEAST OF CEDAR RAPIDS. THE STRONGEST STORMS WERE NEAR EDDYVILLE AND CHARITON IN SOUTHEAST IOWA AND AFTON IN SOUTH CENTRAL IOWA. ALSO...SHOWERS AND STORMS HAD MOVED INTO FAR WESTERN IOWA. THE STORMS WERE WEST OF A LINE EXTENDING FROM MISSOURI VALLEY TO HAMBURG. THE SHOWERS AND STORMS WERE MOVING EAST AT 25 TO 30 MILES AN HOUR. FILLBACH
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 5:30 AM CDT | Flash Flood Warning | DMX | Clarke, Lucas | 3 hr |
| Aug 19, 5:30 AM CDT | Flash Flood Warning | DMX | Union | 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.