Alert archive / Iowa / Flash Flood Warnings in 1993
Flash Flood Warning 77, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Jul 17, 1993, 9:16 PM CDT for 4 counties in Iowa. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Jul 17, 1993, 9:16 PM CDT (02:16 UTC)
- Expired
- Jul 18, 1993, 1:18 AM CDT
- In force
- 4 hr
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Benton County, IA, Iowa County, IA, Johnson County, IA, Linn County, IA
The nearest sounding before it
Minneapolis, MN (KSTC), launched 00:00Z, 2.3 hours before the alert went out and 360 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
- 456 J/kg
- Mixed-layer CIN
- -19 J/kg
- Mixed-layer LCL
- 1065 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- -12 m²/s²
- 0-3 km storm-relative helicity
- -8 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 180217 FFWDSM IAC099-011-095-103-113-123-125-180630- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DES MOINES IA 916 PM CDT SAT JUL 17 1993 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 130 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATION(S)S... IN CENTRAL IOWA ...JASPER COUNTY IN EAST CENTRAL IOWA ...BENTON COUNTY...IOWA COUNTY...JOHNSON COUNTY...LINN COUNTY IN SOUTH CENTRAL IOWA ...MAHASKA COUNTY...MARION COUNTY THUNDERSTORMS HAVE PRODUCED VERY HEAVY RAINFALL OVER A SEVERAL COUNTY AREA. THERE HAVE BEEN NUMEROUS REPORTS OF RAINFALL IN THE 2 TO 3 INCH RANGE IN LESS THAN TWO HOURS. PALO...IN LINN COUNTY ABOUT 10 MILES NORTHWEST OF CEDAR RAPIDS...REPORTED 4 INCHES OF RAIN DURING THE PAST FEW HOURS. COUNTY OFFICIALS REPORTED THAT THEY STOPPED COUNTING HOW MANY COUNTY ROADS WERE UNDER WATER AFTER 10 WERE COUNTED. TWO TO TWO AND ONE HALF INCHES HAS FALLEN IN PRAIRIE CITY. THE HIGHWAY BETWEEN BELLE PLAINE AND LUZERNE WAS REPORTEDLY UNDER WATER AS WELL. STREET FLOODING WAS REPORTED IN VICTOR...WHICH IS ON THE EXTREME WEST CENTRAL EDGE OF IOWA COUNTY. THUNDERSTORMS WILL CONTINUE IN MANY OF THESE AREAS FOR THE NEXT HOUR. CREEKS AND STREAMS WILL RISE RAPIDLY AND OVERFLOW THEIR BANKS. 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 17, 7:43 PM CDT, 1 hour 33 minutes before
IAZALL-180140-
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
743 PM CDT SAT JUL 17 1993
...A SEVERE THUNDERSTORM WATCH CONTINUES FOR PORTIONS OF SOUTHERN AND
CENTRAL IOWA UNTIL 10 PM THIS SATURDAY EVENING...
...A SEVERE THUNDERSTORM WATCH CONTINUES FOR PORTIONS OF EAST CENTRAL
AND SOUTHEAST IOWA UNTIL 11 PM THIS SATURDAY NIGHT...
...A FLASH FLOOD WATCH IS IN EFFECT THROUGH TONIGHT FOR THE SOUTHEAST
HALF OF IOWA...
AT 725 PM CDT...SCATTERED THUNDERSTORMS WITH VERY HEAVY RAIN CONTINUED
ACROSS MUCH OF IOWA EXCLUDING NORTHWEST...NORTH CENTRAL AND SOUTHEAST
IOWA. THIS STORM AREA WAS LOCATED SOUTH OF A LINE EXTENDING FROM SIOUX
CITY...TO WATERLOO...TO THE EXTREME NORTHEAST CORNER OF IOWA.
A 20 MILE WIDE LINE OF THUNDERSTORMS WITH VERY HEAVY RAIN...GUSTY WINDS
AND FREQUENT DEADLY LIGHTING EXTENDED FROM 15 MILES NORTH OF CEDAR
RAPIDS TO 10 MILES NORTHEAST OF NEWTON. OTHER STRONG STORMS EXTENDED
FURTHER SOUTHWEST FROM 5 MILES SOUTHEAST OF NEWTON...TO OSCEOLA...
TO THE MISSOURI BORDER 10 MILES WEST OF LAMONI. ALSO...STRONG STORMS
WERE LOCATED NEAR TIPTON AND JUST EAST OF MONTICELLO.
MOVEMENT WAS EAST AT 20 MILES AN HOUR.
PERSONS SHOULD LISTEN TO NOAA WEATHER RADIO AND LOCAL MEDIA TO STAY
ABREAST OF THIS POTENTIALLY DANGEROUS WEATHER SITUATION.
R A PRENTICE
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Special weather statement, Jul 17, 7:45 PM CDT, 1 hour 31 minutes before
IAZALL-180140- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 743 PM CDT SAT JUL 17 1993 ...A SEVERE THUNDERSTORM WATCH CONTINUES FOR PORTIONS OF SOUTHERN AND CENTRAL IOWA UNTIL 10 PM THIS SATURDAY EVENING... ...A SEVERE THUNDERSTORM WATCH CONTINUES FOR PORTIONS OF EAST CENTRAL AND SOUTHEAST IOWA UNTIL 11 PM THIS SATURDAY NIGHT... ...A FLASH FLOOD WATCH IS IN EFFECT THROUGH TONIGHT FOR THE SOUTHEAST HALF OF IOWA... AT 725 PM CDT...SCATTERED THUNDERSTORMS WITH VERY HEAVY RAIN CONTINUED ACROSS MUCH OF IOWA EXCLUDING NORTHWEST...NORTH CENTRAL AND SOUTHEAST IOWA. THIS STORM AREA WAS LOCATED SOUTH OF A LINE EXTENDING FROM SIOUX CITY...TO WATERLOO...TO THE EXTREME NORTHEAST CORNER OF IOWA. A 20 MILE WIDE LINE OF THUNDERSTORMS WITH VERY HEAVY RAIN...GUSTY WINDS AND FREQUENT DEADLY LIGHTING EXTENDED FROM 15 MILES NORTH OF CEDAR RAPIDS TO 10 MILES NORTHEAST OF NEWTON. OTHER STRONG STORMS EXTENDED FURTHER SOUTHWEST FROM 5 MILES SOUTHEAST OF NEWTON...TO OSCEOLA... TO THE MISSOURI BORDER 10 MILES WEST OF LAMONI. ALSO...STRONG STORMS WERE LOCATED NEAR TIPTON AND JUST EAST OF MONTICELLO. MOVEMENT WAS EAST AT 20 MILES AN HOUR. PERSONS SHOULD LISTEN TO NOAA WEATHER RADIO AND LOCAL MEDIA TO STAY ABREAST OF THIS POTENTIALLY DANGEROUS WEATHER SITUATION. R A PRENTICE
Special weather statement, Jul 17, 8:15 PM CDT, 1 hour 1 minute before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-180230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 815 PM CDT SAT JUL 17 1993 ...THE SEVERE THUNDERSTORM WATCH FOR PARTS OF NORTHEAST IOWA HAS BEEN CANCELLED... THE SEVERE THUNDERSTORM WATCH HAS BEEN CANCELLED IN NORTHEAST IOWA FOR BLACK HAWK AND BUCHANAN COUNTIES...THIS INCLUDES THE CITIES OF WATERLOO AND INDEPENDENCE. THE WATCH CONTINUES EAST OF WATERLOO FOR THE MANCHESTER...DELAWARE COUNTY AND THE DUBUQUE AREA. SOME SCATTERED SHOWERS WITH SOME OCCASIONAL THUNDER CONTINUED IN PARTS OF NORTHEAST IOWA...HOWEVER THEY WERE DECREASING IN INTENSITY. PEOPLE TRAVELING ABOUT THE AREA THIS EVENING AND TONIGHT SHOULD CHECK ROAD REPORTS AND TRY AND TRAVEL ON ONLY MAJOR ROADWAYS. STAY AWAY FROM STREAMS OR ROADS NEAR STREAMS. USE CAUTION AND AND DO NOT DRIVE OVER FLOODED ROADWAYS. ROADS THAT ONCE WERE THERE COULD EASILY BE WASHED OUT BY HEAVY RAIN. A FLASH FLOOD WATCH CONTINUES FOR PARTS OF NORTHEAST IOWA TONIGHT. STAY TUNED TO NOAA WEATHER RADIO OR THE MEDIA FOR MORE INFORMATION ...LATER STATEMENTS AND ADVISORIES. ROBB
Special weather statement, Jul 17, 8:21 PM CDT, 55 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-180230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 815 PM CDT SAT JUL 17 1993 ...THE SEVERE THUNDERSTORM WATCH FOR PARTS OF NORTHEAST IOWA HAS BEEN CANCELLED... THE SEVERE THUNDERSTORM WATCH HAS BEEN CANCELLED IN NORTHEAST IOWA FOR BLACK HAWK AND BUCHANAN COUNTIES...THIS INCLUDES THE CITIES OF WATERLOO AND INDEPENDENCE. THE WATCH CONTINUES EAST OF WATERLOO FOR THE MANCHESTER...DELAWARE COUNTY AND THE DUBUQUE AREA. SOME SCATTERED SHOWERS WITH SOME OCCASIONAL THUNDER CONTINUED IN PARTS OF NORTHEAST IOWA...HOWEVER THEY WERE DECREASING IN INTENSITY. PEOPLE TRAVELING ABOUT THE AREA THIS EVENING AND TONIGHT SHOULD CHECK ROAD REPORTS AND TRY AND TRAVEL ON ONLY MAJOR ROADWAYS. STAY AWAY FROM STREAMS OR ROADS NEAR STREAMS. USE CAUTION AND AND DO NOT DRIVE OVER FLOODED ROADWAYS. ROADS THAT ONCE WERE THERE COULD EASILY BE WASHED OUT BY HEAVY RA6IN. A FLASH FLOOD WATCH CONTINUES FOR PARTS OF NORTHEAST IOWA TONIGHT. STAY TUNED TO NOAA WEATHER RADIO OR THE MEDIA FOR MORE INFORMATION ...LATER STATEMENTS AND ADVISORIES. ROBB
Special weather statement, Jul 17, 8:50 PM CDT, 26 minutes before
IAZALL-180240- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 850 PM CDT SAT JUL 17 1993 ...A SEVERE THUNDERSTORM WATCH CONTINUES FOR PORTIONS OF SOUTHERN AND CENTRAL IOWA UNTIL 10 PM THIS SATURDAY EVENING... ...A SEVERE THUNDERSTORM WATCH CONTINUES FOR PORTIONS OF EAST CENTRAL AND SOUTHEAST IOWA UNTIL 11 PM THIS SATURDAY NIGHT... ...A FLASH FLOOD WATCH IS IN EFFECT THROUGH TONIGHT FOR THE SOUTHEAST HALF OF IOWA... AT 828 PM CDT...NUMEROUS THUNDERSTORMS...MANY WITH VERY HEAVY RAIN... CONTINUED ACROSS THE SOUTHERN TWO-THIRDS OF IOWA. THIS RAIN AREA WAS LOCATED SOUTH OF A LINE EXTENDING FROM SIOUX CITY...TO WATERLOO...TO THE WISCONSIN BORDER 25 MILES NORTHEAST OF DUBUQUE. A 20 TO 30 MILE WIDE BAND OF THUNDERSTORMS WITH VERY HEAVY RAIN AND FREQUENT DEADLY LIGHTING EXTENDED FROM 20 MILES SOUTHWEST OF DUBUQUE... TO MONTEZUMA...TO CHARITON. ANOTHER STRONG STORM WAS LOCATED 15 MILES NORTH OF THE QUAD CITIES. MOVEMENT WAS EAST AT 15 MILES AN HOUR. PERSONS SHOULD LISTEN TO NOAA WEATHER RADIO AND LOCAL MEDIA TO STAY ABREAST OF THIS POTENTIALLY DANGEROUS WEATHER SITUATION. R A PRENTICE
Special weather statement, Jul 17, 8:52 PM CDT, 24 minutes before
IAZALL-180240- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 850 PM CDT SAT JUL 17 1993 ...A SEVERE THUNDERSTORM WATCH CONTINUES FOR PORTIONS OF SOUTHERN AND CENTRAL IOWA UNTIL 10 PM THIS SATURDAY EVENING... ...A SEVERE THUNDERSTORM WATCH CONTINUES FOR PORTIONS OF EAST CENTRAL AND SOUTHEAST IOWA UNTIL 11 PM THIS SATURDAY NIGHT... ...A FLASH FLOOD WATCH IS IN EFFECT THROUGH TONIGHT FOR THE SOUTHEAST HALF OF IOWA... AT 828 PM CDT...NUMEROUS THUNDERSTORMS...MANY WITH VERY HEAVY RAIN... CONTINUED ACROSS THE SOUTHERN TWO-THIRDS OF IOWA. THIS RAIN AREA WAS LOCATED SOUTH OF A LINE EXTENDING FROM SIOUX CITY...TO WATERLOO...TO THE WISCONSIN BORDER 25 MILES NORTHEAST OF DUBUQUE. A 20 TO 30 MILE WIDE BAND OF THUNDERSTORMS WITH VERY HEAVY RAIN AND FREQUENT DEADLY LIGHTING EXTENDED FROM 20 MILES SOUTHWEST OF DUBUQUE... TO MONTEZUMA...TO CHARITON. ANOTHER STRONG STORM WAS LOCATED 15 MILES NORTH OF4 THE QUAD CITIES. MOVEMENT WAS EAST AT 15 MILES AN HOUR. PERSONS SHOULD LISTEN TO NOAA WEATHER RADIO AND LOCAL MEDIA TO STAY ABREAST OF THIS POTENTIALLY DANGEROUS WEATHER SITUATION. R A PRENTICE
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 7:50 PM CDT | Flash Flood Warning | DMX | Tama | 3 hr |
| Jul 17, 9:16 PM CDT | Flash Flood Warning | DMX | Jasper, Mahaska, Marion | 4 hr |
| Jul 17, 10:22 PM CDT | Flash Flood Warning | DMX | Tama | 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.