Alert archive / Iowa / Flash Flood Warnings in 1993
Flash Flood Warning 46, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Jul 5, 1993, 12:54 AM CDT for 5 counties in Iowa. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- Jul 5, 1993, 12:54 AM CDT (05:54 UTC)
- Expired
- Jul 5, 1993, 6:00 AM CDT
- In force
- 5 hr
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Clarke County, IA, Decatur County, IA, Lucas County, IA, Ringgold County, IA, Union County, IA
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 5.9 hours before the alert went out and 214 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
- 98 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 1738 m above ground
- 0-6 km bulk shear
- 69 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 99 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KDSM 050555 FFWDSM IAC039-053-117-123-125-159-175-051100- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DES MOINES IA 1254 AM CDT MON JUL 5 1993 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 600 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATION(S)S... IN SOUTH CENTRAL IOWA ...CLARKE COUNTY...DECATUR COUNTY...LUCAS COUNTY ...MAHASKA COUNTY...MARION COUNTY...RINGGOLD COUNTY...UNION COUNTY HEAVY RAINFALL CONTINUES OVER SOUTHWEST AND SOUTH CENTRAL IOWA. ESTIMATES SHOW THAT 1 1/2 TO 2 INCHES OF RAINFALL HAS FALLEN OVER THESE AREA SINCE EARLY SUNDAY EVENING...WITH SOME AREAS RECEIVING AS MUCH AS 4 INCHES. SINCE SOILS ARE ALREADY SATURATED FROM PREVIOUS RAINFALL...FLASH FLOODING IS LIKELY. IN ADDITION...HEAVY RAINFALL IS LIKELY TO CONTINUE FOR THE NEXT 2 TO 3 HOURS. REPORTS RECEIVED THUS FAR INDICATE THAT WATER WAS ALREADY OVERTOPPING ROADS IN THE TRACY AREA...ABOUT 40 MILES SOUTHEAST OF DES MOINES...IN MARION COUNTY. IN DECATUR COUNTY...THE GRAND RIVER STAGE AT DAVIS CITY WAS 9.6 FEET BEFORE MIDNIGHT. AT 9.5 FEET THE RIVER CAUSES FLOODING SOUTH OF THE CITY OF GRAND RIVER AND EAST OF HIGHWAY 294. PARTS OF THE GRAVEL ROAD FROM SHEWMAKER PARK TO OAKHILL CEMETARY ARE WATER COVERED. ALSO SOME FLOODING OCCURS AT DAVIS CITY PARK. THE RIVER WAS RISING RAPIDLY AND RAINS CONTINUED OVER THE BASIN. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED...ACT QUICKLY. MOVE UP TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. &
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 4, 10:41 PM CDT, 2 hours 13 minutes before
IAZALL-050440- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1040 PM CDT SUN JUL 4 1993 ...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR PORTIONS OF SOUTHWEST...SOUTH CENTRAL AND CENTRAL IOWA UNTIL 5 AM MONDAY... AT 1028 PM CDT...A NARROW BAND OF STRONG THUNDERSTORMS CONTINUED OVER SOUTHWEST INTO SOUTH CENTRAL IOWA. THE BAND WAS 20 MILES WIDE AND EXTENDED FROM 40 MILES SOUTHEAST OF COUNCIL BLUFFS...NEAR VILLISCA TO 35 MILES SOUTHEAST OF DES MOINES...NEAR CHARITON. THE STORMS WERE PART OF A LARGER AREA OF SHOWERS AND STORMS WHICH WAS SOUTH OF A LINE THAT EXTENDED FROM NEAR COUNCIL BLUFFS TO DES MOINES TO NEAR DUBUQUE. THE SHOWERS AND STORMS WERE MOVING NORTHEAST AROUND 30 MILES AN HOUR. FILLBACH
Special weather statement, Jul 4, 11:39 PM CDT, 1 hour 15 minutes before
IAZALL-050540- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1139 PM CDT SUN JUL 4 1993 ...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR PORTIONS OF SOUTHWEST...SOUTH CENTRAL AND CENTRAL IOWA UNTIL 5 AM MONDAY... AT 1126 PM CDT...A NARROW BAND OF STRONG THUNDERSTORMS CONTINUED OVER SOUTHWEST INTO SOUTH CENTRAL IOWA. THE BAND WAS 20 MILES WIDE AND EXTENDED FROM 50 MILES SOUTHEAST OF COUNCIL BLUFFS...AT THE MISSOURI BORDER TO 30 MILES SOUTHEAST OF DES MOINES...NEAR KNOXVILLE. HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING CAN BE EXPECTED WITH THESE STORMS. THE STORMS WERE PART OF A LARGER AREA OF SHOWERS AND STORMS WHICH WAS OVER ABOUT THE SOUTHERN HALF OF IOWA. THE STORMS WERE SOUTH OF A LINE THAT EXTENDED FROM 30 MILES NORTH OF COUNCIL BLUFFS TO 30 MILES NORTH OF DES MOINES TO 30 MILES WEST OF DUBUQUE. THE SHOWERS AND STORMS WERE MOVING NORTHEAST AT AROUND 30 MILES AN HOUR. FILLBACH
Special weather statement, Jul 4, 11:41 PM CDT, 1 hour 13 minutes before
IAZALL-050540- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1139 PM CDT SUN JUL 4 1993 ...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR PORTIONS OF SOUTHWEST...SOUTH CENTRAL AND CENTRAL IOWA UNTIL 5 AM MONDAY... AT 1126 PM CDT...A NARROW BAND OF STRONG THUNDERSTORMS CONTINUED OVER SOUTHWEST INTO SOUTH CENTRAL IOWA. THE BAND WAS 20 MILES WIDE AND EXTENDED FROM 50 MILES SOUTHEAST OF COUNCIL BLUFFS...AT THE MISSOURI BORDER TO 30 MILES SOUTHEAST OF DES MOINES...NEAR KNOXVILLE. HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING CAN BE EXPECTED WITH THESE STORMS. THE STORMS WERE PART OF A LARGER AREA OF SHOWERS AND STORMS WHICH WAS OVER ABOUT THE SOUTHERN HALF OF IOWA. THE STORMS WERE SOUTH OF A LINE THAT EXTENDED FROM 30 MILES NORTH OF COUNCIL BLUFFS TO 30 MILES NORTH OF DES MOINES TO 30 MILES WEST OF DUBUQUE. THE SHOWERS AND STORMS WERE MOVING NORTHEAST AT AROUND 30 MILES AN HOUR. FILLB<ACH
Special weather statement, Jul 5, 12:45 AM CDT, 9 minutes before
IAZALL-050645- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY...INCLUDING MOVEMENT... NATIONAL WEATHER SERVICE DES MOINES IA 1245 AM CDT MON JUL 5 1993 ...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR PORTIONS OF SOUTHWEST...SOUTH CENTRAL AND CENTRAL IOWA UNTIL 5 AM MONDAY... AT 1231 AM CDT...SCATTERED STRONG THUNDERSTORMS CONTINUED OVER SOUTHWEST ...SOUTH CENTRAL...AND EAST CENTRAL IOWA...AND WERE SPREADING INTO SOUTHEAST IOWA. MOST OF THE THUNDERSTORMS WERE SOUTH OF A CLARINDA/ DES MOINES/CENTRAL CITY LINE...ALTHOUGH ISOLATED STRONG THUNDERSTORMS HAD DEVELOPED NORTH OF THIS LINE. THESE STORMS WERE PART OF A LARGE SYSTEM OF NUMEROUS RAINSHOWERS THAT WAS SPREAD OVER THE SOUTH ONE HALF TO TWO THIRDS OF THE STATE. MOST OF THE RAIN WAS SOUTH OF A IDA GROVE/WEBSTER CITY/ELKADER LINE. IDA GROVE IS 45 MILES EAST OF SIOUX CITY...WEBSTER CITY IS 55 MILES NORTH OF DES MOINES...AND ELKADER IS 40 MILES NORTHWEST OF DUBUQUE. . THE STORMS CONTAIN VERY HEAVY RAINS AND WERE DEVELOPING AND MOVING OVER THE SAME AREA FOR THE PAST 2 TO 3 HOURS. EXPECT SOME STREAMS TO OVERFLOW THEIR BANKS AND FLOODING OF LOW LYING AREAS. THE STORMS AND SHOWERS WERE MOVING NORTHEAST AT 30 MILES AN HOUR. MILLER
Special weather statement, Jul 5, 12:49 AM CDT, 5 minutes before
IAZALL-050645- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1245 AM CDT MON JUL 5 1993 ...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR PORTIONS OF SOUTHWEST...SOUTH CENTRAL AND CENTRAL IOWA UNTIL 5 AM MONDAY... AT 1231 AM CDT...SCATTERED STRONG THUNDERSTORMS CONTINUED OVER SOUTHWEST ...SOUTH CENTRAL...AND EAST CENTRAL IOWA...AND WERE SPREADING INTO SOUTHEAST IOWA. MOST OF THE THUNDERSTORMS WERE SOUTH OF A CLARINDA/ DES MOINES/CENTRAL CITY LINE...ALTHOUGH ISOLATED STRONG THUNDERSTORMS HAD DEVELOPED NORTH OF THIS LINE. THESE STORMS WERE PART OF A LARGE SYSTEM OF NUMEROUS RAINSHOWERS THAT WAS SPREAD OVER THE SOUTH ONE HALF TO TWO THIRDS OF THE STATE. MOST OF THE RAIN WAS SOUTH OF A IDA GROVE/WEBSTER CITY/ELKADER LINE. IDA GROVE IS 45 MILES EAST OF SIOUX CITY...WEBSTER CITY IS 55 MILES NORTH OF DES MOINES...AND ELKADER IS 40 MILES NORTHWEST OF DUBUQUE. . THE STORMS CONTAIN VERY HEAVY pRAINS AND WERE DEVELOPING AND MOVING OVER THE SAME AREA FOR THE PAST 2 TO 3 HOURS. EXPECT SOME STREAMS TO OVERFLOW THEIR BANKS AND FLOODING OF LOW LYING AREAS. MILLER
Special weather statement, Jul 5, 12:50 AM CDT, 4 minutes before
IAZALL-050645- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY...INCLUDING MOVEMENT... NATIONAL WEATHER SERVICE DES MOINES IA 1245 AM CDT MON JUL 5 1993 ...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR PORTIONS OF SOUTHWEST...SOUTH CENTRAL AND CENTRAL IOWA UNTIL 5 AM MONDAY... AT 1231 AM CDT...SCATTERED STRONG THUNDERSTORMS CONTINUED OVER SOUTHWEST ...SOUTH CENTRAL...AND EAST CENTRAL IOWA...AND WERE SPREADING INTO SOUTHEAST IOWA. MOST OF THE THUNDERSTORMS WERE SOUTH OF A CLARINDA/ DES MOINES/CENTRAL CITY LINE...ALTHOUGH ISOLATED STRONG THUNDERSTORMS HAD DEVELOPED NORTH OF THIS LINE. THESE STORMS WERE PART OF A LARGE SYSTEM OF NUMEROUS RAINSHOWERS THAT WAS SPREAD OVER THE SOUTH ONE HALF TO TWO THIRDS OF THE STATE. MOST OF THE RAIN WAS SOUTH OF A IDA GROVE/WEBSTER CITY/ELKADER LINE. IDA GROVE IS 45 MILES EAST OF SIOUX CITY...WEBSTER CITY IS 55 MILES NORTH OF DES MOINES...AND ELKADER IS 40 MILES NORTHWEST OF DUBUQUE. . THE STORMS CONTAIN VERY HEAVY RAINS AND WERE DEVELOPING AND MOVING OVER THE SAME AREA FOR THE PAST 2 TO 3 HOURS. EXPECT SOME STREAMS TO OVERFLOW THEIR BANKS AND FLOODING OF LOW LYING AREAS. THE STORMS AND SHOWERS WERE MOVING NORTHEAST AT 30 MILES ArN HOUR. MILLER
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 4, 11:27 PM CDT | Flash Flood Warning | DMX | Decatur | 3 hr |
| Jul 5, 12:54 AM CDT | Flash Flood Warning | DMX | Mahaska, Marion | 5 hr |
| Jul 5, 2:46 AM CDT | Flash Flood Warning | DMX | Iowa, Keokuk, Poweshiek | 4 hr |
| Jul 5, 3:19 AM CDT | Flash Flood Warning | DMX | Benton, Johnson, Linn | 4 hr |
| Jul 5, 1:19 PM CDT | Severe Thunderstorm Warning | DMX | Adams, Taylor | 26 min |
| Jul 5, 1:37 PM CDT | Severe Thunderstorm Warning | DMX | Adams | 11 min |
| Jul 5, 2:09 PM CDT | Severe Thunderstorm Warning | DMX | Decatur, Wayne | 36 min |
| Jul 5, 2:33 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Lucas, Wayne | 27 min |
| Jul 5, 2:33 PM CDT | Severe Thunderstorm Warning | DMX | Monroe | 20 min |
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.