Alert archive / Iowa / Flash Flood Warnings in 1993
Flash Flood Warning 49, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Jul 5, 1993, 3:19 AM CDT for Benton County, Johnson County, Linn County, Iowa. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Jul 5, 1993, 3:19 AM CDT (08:19 UTC)
- Expired
- Jul 5, 1993, 7:00 AM CDT
- In force
- 4 hr
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Benton County, IA, Johnson County, IA, Linn County, IA
The nearest sounding before it
Minneapolis, MN (KSTC), launched 00:00Z, 8.3 hours before the alert went out and 356 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
- 78 J/kg
- Mixed-layer CIN
- -75 J/kg
- Mixed-layer LCL
- 1507 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 79 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KDSM 050819 FFWDSM IAC011-103-113-051200- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DES MOINES IA 319 AM CDT MON JUL 5 1993 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 700 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATION(S)S... IN EAST CENTRAL IOWA ...SOUTHEASTERN BENTON COUNTY...NORTHWESTERN JOHNSON COUNTY ...LINN COUNTY HEAVY RAINFALL OF 2 TO 4 INCHES HAS FALLEN OVER BENTON...LINN...AND JOHNSON COUNTIES. SOILS IN THESE AREAS WERE ALREADY SATURATED FROM PREVIOUS RAINS. REPORTS FROM THE CEDAR RAPIDS AREA INDICATE 3.59 INCHES OF RAINFALL SINCE 600 PM SUNDAY...MUCH OF IS SINCE MIDNIGHT. THERE HAVE BEEN NUMEROUS REPORTS OF ROAD CLOSURES IN CEDAR RAPIDS. THE HEAVIEST RAINFALL HAS PASSED TO THE EAST OF THE AREA. ADDITIONAL RAINFALL CAN BE EXPECTED DURING THE PREDAWN HOURS. THIS WILL LIKELY CAUSE FURTHER FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE INT`O 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. &
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 5, 12:49 AM CDT, 2 hours 30 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, 2 hours 29 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
Special weather statement, Jul 5, 1:45 AM CDT, 1 hour 34 minutes before
IAZALL-050745- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 145 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 130 AM CDT...SCATTERED STRONG THUNDERSTORMS CONTINUED OVER SOUTH CENTRAL...SOUTHEAST...AND EAST CENTRAL IOWA. THESE STORMS WERE HEAVY RAIN PRODUCERS AND WERE MOSTLY SOUTH OF A WINTERSET/DES MOINES/CENTRAL CITY/DYERSVILLE LINE. WINTERSET IS 25 MILES SOUTHWEST OF DES MOINES ...CENTRAL CITY IS 15 MILES NORTHEAST OF CEDAR RAPIDS...AND DYERSVILLE IS 20 MILES WEST OF DUBUQUE. THESE STORMS WERE PRODUCING VERY HEAVY RAINS AND ALREADY SWOLLEN STREAMS IN THESE AREAS COULD FLOW OVER THEIR BANKS AND LOW LYING AREAS COULD EXPERIENCE FLOODING. THE MOST SUSCEPTIBLE AREA FOR FLOODING IS THE SOUTH CENTRAL COUNTIES WHERE FLOOD WARNINGS HAVE BEEN POSTED. . THESE STORMS WERE PART OF A LARGE SYSTEM OF NUMEROUS SHOWERS THAT COVERED MUCH OF THE SOUTHEAST TWO THIRDS OF THE STATE...SOUTH OF A ONAWA/MASON CITY LINE. THE STORMS AND SHOWERS WERE MOVING NORTHEAST AT 30 MILES AN HOUR. MILLER
Special weather statement, Jul 5, 1:46 AM CDT, 1 hour 33 minutes before
IAZALL-050745- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 145 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 130 AM CDT...SCATTERED STRONG THUNDERSTORMS CONTINUED OVER SOUTH CENTRAL...SOUTHEAST...AND EAST CENTRAL IOWA. THESE STORMS WERE HEAVY RAIN PRODUCERS AND WERE MOSTLY SOUTH OF A WINTERSET/DES MOINES/CENTRAL CITY/DYERSVILLE LINE. WINTERSET IS 25 MILES SOUTHWEST OF DES MOINES ...CENTRAL CITY IS 15 MILES NORTHEAST OF CEDAR RAPIDS...AND DYERSVILLE IS 20 MILES WEST OF DUBUQUE. THESE STORMS WERE PRODUCING VERY HEAVY RAINS AND ALREADY SWOLLEN STREAMS IN THESE AREAS COULD FLOW OVER THEIR BANKS AND LOW LYING AREAS COULD EXPERIENCE FLOODING. THE MOST SUSCEPTIBLE AREA FOR FLOODING IS THE SOUTH CENTRAL COUNTIES WHERE FLOOD WARNINGS HAVE BEEN POSTED. . THESE STORMS WERE PART OF A LARGE SYSTEM OF NUMEROUS SHOWERS THAT COVERED MUCH OF THE SOUTHEAST TWO THIRDS OF THE STATE...SOUTH OF A ONAWA/MASON CITY LINE. THE STORMS AND SHOWERS WERE MOVING NORTHEAST AT 30 MILES AN HOUR. MILLER
Special weather statement, Jul 5, 2:45 AM CDT, 34 minutes before
IAZALL-050845- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 245 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 230 AM CDT...SCATTERED STRONG THUNDERSTORMS CONTINUED OVER SOUTH CENTRAL...SOUTHEAST...AND EAST CENTRAL IOWA. THE STRONGEST STORMS WAS LOCATED 60 MILES SOUTH OF DES MOINES...NEAR MOUNT AYR. MOST OF THE THUNDERSTORMS WERE SOUTH OF A CRESTON/CEDAR RAPIDS/MONTICELLO LINE. CRESTON IS 45 MILES SOUTHWEST OF DES MOINES AND MONTICELLO IS 30 MILES NORTHEAST OF CEDAR RAPIDS. ISOLATED STRONG THUNDERSTORMS WERE ALSO 15 TO 25 MILES EAST OF SIOUX CITY. THESE STORMS WERE HEAVY RAIN PRODUCERS AND COULD CAUSE STREAMS TO OVERFLOW THEIR BANKS AND SOME FLOODING OF LOW LYING AREAS. PEOPLE IN THESE AREAS ARE URGED TO MONITOR WEATHER REPORTS AND BE PREPARED TO MOVE TO HIGHER GROUND. . THESE STORMS WERE PART OF A LARGE SYSTEM OF NUMEROUS SHOWERS THAT COVERED MUCH OF THE SOUTHEAST THREE FOURTHS OF THE STATE...SOUTH OF A SIOUX CITY/MASON CITY LINE. THE STORMS AND SHOWERS WERE MOVING NORTHEAST AT 35 MILES AN HOUR. MILLER
Special weather statement, Jul 5, 2:46 AM CDT, 33 minutes before
IAZALL-050845- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 245 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 230 AM CDT...SCATTERED STRONG THUNDERSTORMS CONTINUED OVER SOUTH CENTRAL...SOUTHEAST...AND EAST CENTRAL IOWA. THE STRONGEST STORMS WAS LOCATED 60 MILES SOUTH OF DES MOINES...NEAR MOUNT AYR. MOST OF THE THUNDERSTORMS WERE SOUTH OF A CRESTON/CEDAR RAPIDS/MONTICELLO LINE. CRESTON IS 45 MILES SOUTHWEST OF DES MOINES AND MONTICELLO IS 30 MILES NORTHEAST OF CEDAR RAPIDS. ISOLATED STRONG THUNDERSTORMS WERE ALSO 15 TO 25 MILES EAST OF SIOUX CITY. THESE STORMS WERE HEAVY RAIN PRODUCERS AND COULD CAUSE STREAMS TO OVERFLOW THEIR BANKS AND SOME FLOODING OF LOW LYING AREAS. PEOPLE IN THESE AREAS ARE URGED TO MONITOR WEATHER REPORTS AND BE PREPARED TO MOVE TO HIGHER GROUND. . THESE STORMS WERE PART OF A LARGE SYSTEM OF NUMEROUS SHOWERS THAT COVERED MUCH OF THE SOUTHEAST THREE FOURTHS OF THE STATE...SOUTH OF A SIOUX CITY/MASON CITY LINE. THE STORMS AND SHOWERS WERE MOVING NORTHEAST AT 35 MILES AN 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 | Clarke, Decatur, Lucas, Ringgold, Union | 5 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, 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.