Alert archive / Iowa / Flash Flood Warnings in 1993
Flash Flood Warning 91, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Aug 9, 1993, 8:00 PM CDT for Chickasaw County, Iowa. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Aug 9, 1993, 8:00 PM CDT (01:00 UTC)
- Expired
- Aug 9, 1993, 11:00 PM CDT
- In force
- 3 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, 1.0 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 100059 FFWALO IAC037-100400- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE WATERLOO IA 800 PM CDT MON AUG 9 1993 THE NATIONAL WEATHER SERVICE IN WATERLOO HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 1100 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHEAST IOWA ...CHICKASAW COUNTY AT 755 PM REPORTS OF WIDESPREAD FLASH FLOODING HAVE BEEN RECEIVED FROM CHICKASAW COUNTY. INTENSE RAINFALL IS CAUSING MOST ROADS TO BE UNDER WATER WITH SEVERAL STREAMS REPORTED OUT OF THEIR BANKS. THE FOLLOWING STREAMS WERE CAUSING FLASH FLOODING...LITTLE CEDAR...SIMPSON CREEK AND THE EAST WAPSIPINICON. AT 8 PM RADAR SHOWED THUNDERSTORMS CONTINUING FROM 30 MILES WEST TO 25 MILES SOUTHWEST OF DECORAH. MORE STORMS WERE OCCURRING NEAR MASON CITY AND THESE WILL MOVE INTO THE CHICKASAW COUNTY AREA BY 9 PM. PEOPLE LIVING NEAR ANY OF THE ABOVE MENTIONED STREAMS SHOULD PLAN A QUICK EVACUATION TO HIGHER GROUNDS. IT'S IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS... OR CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS. CAMPERS SHOULD AVOID CAMPING ALONG STREAMS OR CREEKS DURING THREATENING RAINS. 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, 7:22 PM CDT, 38 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-100115- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 725 PM CDT MON AUG 9 1993 ...VERY STRONG THUNDERSTORMS MOVING THROUGH WATERLOO AND JESUP AREAS... THROUGH 8 PM VERY STRONG THUNDERSTORMS WILL AFFECT THE WATERLOO...JESUP ...OELWEIN AND INDEPENDENCE AREAS. THESE STORMS MAY PRODUCE WINDS TO NEAR 50 MPH (43 MPH WAS RECORDED AT THE WATERLOO AIRPORT) IN ADDITION TO VERY HEAVY RAINS AND HAIL. A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 10 PM. PEOPLE IN THE PATH OF THESE STORMS SHOULD SEEK SAFE SHELTER AS THESE STORMS MOVE THROUGH THE HIGHWAY 20 AREA. OTHER STORMS WILL AFFECT AREAS NORTH OF HIGHWAY 18. OTHER INFORMATION... A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WORTH COUNTY UNTIL 745 PM. A SEVERE THUNDERSTORM WARNING FOR WINNEBAGO COUNTY UNTIL 730 PM. AN URBAN AND SMALL STREAM FLOOD ADVISORY IS IN EFFECT FOR CHICKlASAW COUNTY UNTIL 830 PM. A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 10 PM. COLLAR &
Special weather statement, Aug 9, 7:25 PM CDT, 35 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-100115- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 725 PM CDT MON AUG 9 1993 ...VERY STRONG THUNDERSTORMS MOVING THROUGH WATERLOO AND JESUP AREAS... THROUGH 8 PM VERY STRONG THUNDERSTORMS WILL AFFECT THE WATERLOO...JESUP ...OELWEIN AND INDEPENDENCE AREAS. THESE STORMS MAY PRODUCE WINDS TO NEAR 50 MPH (43 MPH WAS RECORDED AT THE WATERLOO AIRPORT) IN ADDITION TO VERY HEAVY RAINS AND HAIL. A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 10 PM. PEOPLE IN THE PATH OF THESE STORMS SHOULD SEEK SAFE SHELTER AS THESE STORMS MOVE THROUGH THE HIGHWAY 20 AREA. OTHER STORMS WILL AFFECT AREAS NORTH OF HIGHWAY 18. OTHER INFORMATION... A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WORTH COUNTY UNTIL 745 PM. A SEVERE THUNDERSTORM WARNING FOR WINNEBAGO COUNTY UNTIL 730 PM. AN URBAN AND SMALL STREAM FLOOD ADVISORY IS IN EFFECT FOR CHICKASAW COUNTY UNTIL 830 PM. A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 10 PM. COLLAR &
Special weather statement, Aug 9, 7:40 PM CDT, 20 minutes before
IAZALL-100140- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 740 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 730 PM CDT...INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN AND HAIL WERE LOCATED OVER NORTH CENTRAL AND NORTHEAST IOWA. THESE THUNDERSTORMS WERE LOCATED NORTH AND EAST OF A LINE EXTENDING FROM SIOUX CITY TO DUBUQUE. THE HEAVIEST THUNDERSTORMS WERE LOCATED IN THE MASON CITY AREA...AND ALSO JUST NORTHEAST OF WATERLOO. VERY HEAVY RAIN 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, 7:49 PM CDT, 11 minutes before
IAZALL-100140- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 740 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 730 PM CDT...INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN AND HAIL WERE LOCATED OVER NORTH CENTRAL AND NORTHEAST IOWA. THESE THUNDERSTORMS WERE LOCATED NORTH AND EAST OF A LINE EXTENDING FROM SIOUX CITY TO DUBUQUE. THE HEAVIEST THUNDERSTORMS WERE LOCATED IN THE MASON CITY AREA...AND ALSO JUST NORTHEAST OF WATERLOO. VERY HEAVY RAIN AND HAIL MAY BE EXPECTED WITH THE PASSAGE OF THESE THUNDERSTORMS. THE THUNDERSTORMS WERE MOVING SOUTHEAST AT 35 MILES ANV HOUR. SCOTT
Special weather statement, Aug 9, 7:59 PM CDT, 1 minute before
IAZALL-100300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 800 PM CDT MON AUG 9 1993 ...SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR MUCH OF NORTHERN IOWA UNTIL 10 PM... SCATTERED THUNDERSTORMS HAD RAPIDLY DEVELOPED OVER NORTHWEST IOWA AND OVER PARTS OF NORTH CENTRAL IOWA SINCE 7PM. THE STRONGEST OF THESE STORMS WAS LOCATED EAST OF ESTHERVILLE IN EXTREME NORTHWEST IOWA. BRIEF HEAVY RAINS...DANGEROUS LIGHTNING...AND WIND GUSTS UP TO 45 MILES AN HOUR CAN BE EXPECTED WITH THE STRONGER STORMS. IN CENTRAL AND SOUTHERN IOWA...SKIES WERE MOSTLY CLEAR. ISOLATED THUNDERSTORMS COULD MOVE OR DEVELOP IN THE CEDAR RAPIDS AREA BY 9PM... AND POSSIBLY DEVELOP IN THE AMES AND BOONE AREAS AROUND 10 PM. . JM
Special weather statement, Aug 9, 8:00 PM CDT, 0 minutes before
IAZALL-100300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 800 PM CDT MON AUG 9 1993 ...SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR MUCH OF NORTHERN IOWA UNTIL 10 PM... SCATTERED THUNDERSTORMS HAD RAPIDLY DEVELOPED OVER NORTHWEST IOWA AND OVER PARTS OF NORTH CENTRAL IOWA SINCE 7PM. THE STRONGEST OF THESE STORMS WAS LOCATED EAST OF ESTHERVILLE IN EXTREME NORTHWEST IOWA. BRIEF HEAVY RAINS...DANGEROUS LIGHTNING...AND WIND GUSTS UP TO 45 MILES AN HOUR CAN BE EXPECTED WITH THE STRONGER STORMS. IN CENTRAL AND SOUTHERN IOWA...SKIES WERE MOSTLY CLEAR. ISOLATED THUNDERSTORMS COULD MOVE OR DEVELOP IN THE CEDAR RAPIDS AREA BY 9PM... AND POSSIBLY DEVELOP IN THE AMES AND BOONE AREAS AROUND 10 PM. . JM WWJP20RJTD ,g
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, 8:33 PM CDT | Severe Thunderstorm Warning | DMX | Linn | 42 min |
| Aug 9, 8:40 PM CDT | Severe Thunderstorm Warning | DMX | Butler | 50 min |
| Aug 9, 10:40 PM CDT | Flash Flood Warning | DMX | Chickasaw | 2 hr |
| 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.