Alert archive / Iowa / Flash Flood Warnings in 1993
Flash Flood Warning 9, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at May 4, 1993, 4:59 AM CDT for Jones County, Iowa. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- May 4, 1993, 4:59 AM CDT (09:59 UTC)
- Expired
- May 4, 1993, 8:00 AM CDT
- In force
- 3 hr
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Jones County, IA
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 00:00Z, 10.0 hours before the alert went out and 359 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 521 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 142 m²/s²
- 0-3 km storm-relative helicity
- 148 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KDSM 041003 FFWDSM IAC051-101-105-177-179-183-041300- BULLETIN - EBS ACTIVATION REQUESTED FLOOD WARNING NATIONAL WEATHER SERVICE DES MOINES IA 459 AM CDT TUE MAY 4 1993 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A FLOOD WARNING EFFECTIVE UNTIL 800 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATION(S)S... IN SOUTHEAST IOWA ...DAVIS COUNTY...JEFFERSON COUNTY...KEOKUK COUNTY ...VAN-BUREN COUNTY...WAPELLO COUNTY...WASHINGTON COUNTY A FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. THIS WARNING AFFECTS THE FOLLOWING CITIES OF SOUTHEAST IOWA: OTTUMWA... SIGOURNEY...BLOOMFIELD...AND FAIRFIELD. AT 450 AM CDT...DES MOINES RADAR CONTINUED TO SHOW AN EXPANDING AREA OF SHOWERS AND THUNDERSTORMS OVER THE WARNED AREA. THIS IS THE SAME REGION THAT HAS RECEIVED EXCESSIVE RAINFALL DURING THE PAST 24 HOURS. THE AREA OF SHOWERS AND THUNDERSTORMS WAS MOVING VERY SLOWLY TO THE NORTHWEST AND DUE TO THE SLOW MOVEMENT OF THE RAIN...AN ADDITIONAL 1 TO 2 INCHES IS POSSIBLE. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO HIGHER GROUND. 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. SMITH
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, May 4, 3:45 AM CDT, 1 hour 14 minutes before
IAZALL-040935- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY...CORRECTED TYPO PARA 3 NATIONAL WEATHER SERVICE DES MOINES IA 345 AM CDT TUE MAY 4 1993 AT 333 AM CDT...ISOLATED STRONG THUNDERSTORMS WERE LOCATED OVER EAST CENTRAL AND SOUTHEAST IOWA. THESE THUNDERSTORMS WERE LOCATED IN A 10 MILE WIDE AREA THAT EXTENDED FROM THE IOWA/MISSOURI BORDER SOUTH OF KEOSAUQUA NORTH TO WASHINGTON. KEOSAUQUA IS 40 MILES WEST OF BURLINGTON WHILE WASHINGTON IS 35 MILES SOUTH OF CEDAR RAPIDS. DUE TO THE SLOW MOVEMENT OF THESE STORMS LOCAL RAINFALL AMOUNTS OF 1 TO 2 INCHES IS LIKELY AND THIS WILL CAUSE RAPID RISES ON SMALL RIVERS AND STREAMS. THESE STORMS WERE PART OF AN EXPANDING AREA OF SHOWERS AND THUNDERSTORMS OVER THE SOUTHEAST QUARTER OF IOWA. THESE SHOWERS AND STORMS WERE EAST OF A KEOSAUQUA TO CEDAR RAPIDS LINE. ANOTHER CLUSTER OF SHOWERS AND ISOLATED THUNDERSTORMS EXTENDED FROM CENTRAL INTO NORTHEAST IOWA. THE SHOWERS AND STORMS IN THIS AREA WERE LOCATED ALONG AND 20 MILES EITHER SIDE OF A LINE FROM 30 MILES EAST OF DES MOINES...NEAR NEWTON...NORTH TO CHARLES CITY WHICH IS 30 MILES EAST OF MASON CITY. THE SHOWERS AND STORMS WERE MOVING NORTHWEST AT 10 TO 15 MILES AN HOUR. BARLOW
Special weather statement, May 4, 3:48 AM CDT, 1 hour 11 minutes before
IAZALL-040935- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 345 AM CDT TUE MAY 4 1993 AT 333 AM CDT...ISOLATED STRONG THUNDERSTORMS WERE LOCATED OVER EAST CENTRAL AND SOUTHEAST IOWA. THESE THUNDERSTORMS WERE LOCATED IN A 10 MILE WIDE AREA THAT EXTENDED FROM THE IOWA/MISSOURI BORDER SOUTH OF KEOSAUQUA NORTH TO WASHINGTON. KEOSAUQUA IS 40 MILES WEST OF BURLINGTON WHILE WASHINGTON IS 35 MILES SOUTH OF CEDAR RAPIDS. DUE TO THE SLOW MOVEMENT OF THESE STORMS LOCAL RAINFALL AMOUNTS OF 1 TO 2 INCHES IS LIKELY AND THIS WILL CAUSE RAPID RISES ON SMALL RIVERS AND STREAMS. THESE STORMS WERE PART OF AN EXPANDING AREA OF SHOWERS AND THUNDERSTORMS OVER THE SOUTHEAST QUARTER OF IOWA. THESE SHOWERS AND STORMS WERE EAST OF A KEOSAUQUA TO CEDAR RAPIDS LINE. ANOTHER CLUSTER OF SHOWERS AND ISOLATED THUDNERSTORMS EXTENDED FROM CENTRAL INTO NORTHEAST IOWA. THE SHOWERS AND STORMS IN THIS AREA WERE LOCATED ALONG AND 20 MILES EITHER SIDE OF A LINE FROM 30 MILES EAST OF DES MOINES...NEAR NEWTON...NORTH TO CHARLES CITY WHICH IS 30 MILES EAST OF MASON CITY. THE SHOWERS AND STORMS WERE MOVING NORTHWEST AT 10 TO 15 MILES AN HOUR. BARLOW
Special weather statement, May 4, 3:53 AM CDT, 1 hour 6 minutes before
IAZALL-040935- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY...CORRECTED TYPO PARA 3 NATIONAL WEATHER SERVICE DES MOINES IA 345 AM CDT TUE MAY 4 1993 AT 333 AM CDT...ISOLATED STRONG THUNDERSTORMS WERE LOCATED OVER EAST CENTRAL AND SOUTHEAST IOWA. THESE THUNDERSTORMS WERE LOCATED IN A 10 MILE WIDE AREA THAT EXTENDED FROM THE IOWA/MISSOURI BORDER SOUTH OF KEOSAUQUA NORTH TO WASHINGTON. KEOSAUQUA IS 40 MILES WEST OF BURLINGTON WHILE WASHINGTON IS 35 MILES SOUTH OF CEDAR RAPIDS. DUE TO THE SLOW MOVEMENT OF THESE STORMS LOCAL RAINFALL AMOUNTS OF 1 TO 2 INCHES IS LIKELY AND THIS WILL CAUSE RAPID RISES ON SMALL RIVERS AND STREAMS. THESE STORMS WERE PART OF AN EXPANDING AREA OF SHOWERS AND THUNDERSTORMS OVER THE SOUTHEAST QUARTER OF IOWA. THESE SHOWERS AND STORMS WERE EAST OF A KEOSAUQUA TO CEDAR RAPIDS LINE. ANOTHER CLUSTER OF SHOWERS AND ISOLATED THUNDERSTORMS EXTENDED FROM CENTRAL INTO NORTHEAST IOWA. THE SHOWERS AND STORMS IN THIS AREA WERE LOCATED ALONG AND 20 MILES EITHER SIDE OF A LINE FROM 30 MILES EAST OF DES MOINES...NEAR NEWTON...NORTH TO CHARLES CITY WHICH IS 30 MILES EAST OF MASON CITY. THE SHOWERS AND STORMS WERE MOVING NORTHWEST AT 10 TO 15 MILES AN HOUR. BARLOW
Special weather statement, May 4, 4:43 AM CDT, 16 minutes before
IAZALL-041035- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 443 AM CDT TUE MAY 4 1993 AT 433 AM CDT...THUNDERSTORMS PRODUCING LOCALLY HEAVY RAIN WERE LOCATED OVER SOUTHEAST AND EAST CENTRAL IOWA. THESE THUNDERSTORMS WERE LOCATED IN A 10 MILE WIDE AREA FROM THE IOWA/MISSOURI BORDER SOUTH OF KEOSAUQUA NORTH TO RICHLAND. KEOSAUQUA IS 40 MILES WEST OF BURLINGTON...RICHLAND IS 20 MILES NORTHEAST OF OTTUMWA. DUE TO THE SLOW MOVEMENT OF THESE STORMS LOCAL RAINFALL AMOUNTS OF 1 TO 2 INCHES IS LIKELY AND THIS WILL CAUSE RAPID RISES ON SMALL RIVERS AND STREAMS. THESE STORMS WERE PART OF AN EXPANDING AREA OF SHOWERS AND THUNDERSTORMS OVER THE SOUTHEAST QUARTER OF IOWA. THESE SHOWERS AND STORMS WERE EAST OF A BLOOMFIELD TO OTTUMWA TO CEDAR RAPIDS LINE. BLOOMFIELD IS 20 MILES SOUTH OF OTTUMWA. ANOTHER CLUSTER OF SHOWERS EXTENDED FROM CENTRAL INTO PARTS OF NORTH CENTRAL AND NORTHEAST IOWA. THE SHOWERS IN THIS AREA WERE ALONG AND 20 MILES EITHER SIDE OF A LINE FROM MONROE NORTH TO NEAR OSAGE. MONROE IS 25 MILES EAST OF DES MOINES WHILE OSAGE IS 25 MILES NORTHEAST OF MASON CITY. THE SHOWERS AND STORMS WERE MOVING NORTHWEST AT 10 TO 15 MILES AN HOUR. BARLOW
Special weather statement, May 4, 4:45 AM CDT, 14 minutes before
IAZALL-041035- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 443 AM CDT TUE MAY 4 1993 AT 433 AM CDT...THUNDERSTORMS PRODUCING LOCALLY HEAVY RAIN WERE LOCATED OVER SOUTHEAST AND EAST CENTRAL IOWA. THESE THUNDERSTORMS WERE LOCATED IN A 10 MILE WIDE AREA FROM THE IOWA/MISSOURI BORDER SOUTH OF KEOSAUQUA NORTH TO RICHLAND. KEOSAUQUA IS 40 MILES WEST OF BURLINGTON...RICHLAND IS 20 MILES NORTHEAST OF OTTUMWA. DUE TO THE SLOW MOVEMENT OF THESE STORMS LOCAL RAINFALL AMOUNTS OF 1 TO 2 INCHES IS LIKELY AND THIS WILL CAUSE RAPID RISES ON SMALL RIVERS AND STREAMS. THESE STORMS WERE PART OF AN EXPANDING AREA OF SHOWERS AND THUNDERSTORMS OVER THE SOUTHEAST QUARTER OF IOWA. THESE SHOWERS AND STORMS WERE EAST OF A BLOOMFIELD TO OTTUMWA TO CEDAR RAPIDS LINE. BLOOMFIELD IS 20 MILES SOUTH OF OTTUMWA. ANOTHER CLUSTER OF SHOWERS EXTENDED FROM CENTRAL INTO PARTS OF NORTH CENTRAL AND NORTHEAST IOWA. THE SHOWERS IN THIS AREA WERE ALONG AND 20 MILES EITHER SIDE OF A LINE FROM MONROE NORTH TO NEAR OSAGE. MONROE IS 25 MILES EAST OF DES MOINES WHILE OSAGE IS 25 MILES NORTHEAST OF MASON CITY. THE SHOWERS AND STORMS WERE MOVING NORTHWEST AT 10 TO 15 MILES AN HOUR. BARLOW
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 4, 4:59 AM CDT | Flash Flood Warning | DMX | Davis, Jefferson, Van Buren, Wapello | 3 hr |
| May 4, 4:59 AM CDT | Flash Flood Warning | DMX | Washington | 3 hr |
| May 4, 7:55 AM CDT | Flash Flood Warning | DMX | Davis, Jefferson, Van Buren, Wapello | 4 hr |
| May 4, 7:55 AM CDT | Flash Flood Warning | DMX | Washington | 4 hr |
| May 4, 7:55 AM CDT | Flash Flood Warning | DMX | Jones | 4 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.