Alert archive / Iowa / Flash Flood Warnings in 1990
Flash Flood Warning 10, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Jun 17, 1990, 3:14 AM CDT for Crawford County, Iowa. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Jun 17, 1990, 3:14 AM CDT (08:14 UTC)
- Expired
- Jun 17, 1990, 6:15 AM CDT
- In force
- 3 hr
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Crawford County, IA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Topeka, KS (KTOP), launched 00:00Z, 8.2 hours before the alert went out and 338 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
- 3235 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 1012 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 54 m²/s²
- 0-3 km storm-relative helicity
- 260 m²/s²
- Significant tornado parameter
- 2.2
- Supercell composite
- 14.2
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KDSM 170814
FFWDSM
IAC047-171115-
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
314 AM CDT SUN JUN 17 1990
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 615 AM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
IN WEST CENTRAL IOWA
...CRAWFORD
FLASH FLOODING HAS BEEN REPORTED IN CRAWFORD COUNTY IN WEST CENTRAL
IOWA. ADDITIONAL HEAVY RAINS OF 3 TO 4 INCHES FELL SATURDAY EVENING
AND EARLY THIS MORNING.
PERSONS IN THE CITY OF DENISON ARE BEING EVACUATED IN SOME AREAS DUE
TO HIGH WATER.
SOME ROADS AND HIGHWAYS IN CRAWFORD COUNTY ALSO HAVE WATER OVER THEM
SO TRAVELERS SHOULD BE ALERT AND AVOID DRIVING THROUGH AREAS OF HIGH
WATER.
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.
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. MOVEH TO HIGHER GROUND.
ADAMSWhat 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, Jun 17, 1:44 AM CDT, 1 hour 30 minutes before
IAZALL-170730- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 140 AM CDT SUN JUN 17 1990 ...FLASH FLOOD WATCH FOR ALL OF IOWA TONIGHT... ...SEVERE THUNDERSTORM WATCH FOR CENTRAL AND EASTERN IOWA UNTIL 4 AM... AT 128 AM...ISOLATED INTENSE THUNDERSTORMS CONTINUED OVER CENTRAL AND SOUTH CENTRAL IOWA...10 TO 25 MILES SOUTH OF DES MOINES NEAR INDIANOLA AND OSCEOLA. EXTREME RAINS AND STRONG GUSTY WINDS OF 50 TO 60 MILES AN HOUR ARE OCCURRING WITH THESE INTENSE STORMS. ONE TO TWO INCHES OF RAIN IS LIKELY...AND SINCE MOST OF IOWA IS ALREADY WATERLOGGED....A VERY SERIOUS FLOOD PROBLEM CONTINUES. AND...NUMEROUS SHOWERS AND SCATTERED STORMS COVERED MUCH OF THE NORTH- WEST TWO THIRDS OF IOWA. THE SHOWERS AND STORMS WERE MOVING EAST AT 25 MILES AN HOUR. KS
Special weather statement, Jun 17, 2:09 AM CDT, 1 hour 5 minutes before
IAZALL-170800- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 210 AM CDT SUN JUN 17 1990 ...FLASH FLOOD WATCH FOR ALL OF IOWA TONIGHT... ...SEVERE THUNDERSTORM WATCH FOR CENTRAL AND EASTERN IOWA UNTIL 4 AM... AT 205 AM...ISOLATED INTENSE THUNDERSTORMS EXTENDED FROM EAST CENTRAL INTO SOUTH CENTRAL IOWA. THE STORMS WERE BETWEEN CEDAR RAPIDS AND LAMONI NEAR BROOKLYN...NEW SHARON...PELLA AND CHARITON. EXCESSIVE RAINS AND STRONG GUSTY WINDS TO 50 MILES AN HOUR ARE OCCURRING WITH THESE INTENSE STORMS. ONE TO TWO INCHES OF RAIN IS LIKELY...AND SINCE MOST OF IOWA IS ALREADY SATURATED...A VERY SERIOUS FLOOD PROBLEM CONTINUES. ALSO...A LARGE AREA OF SHOWERS AND SCATTERED STORMS...125 MILES WIDE... STRETCHED FROM SOUTHWEST AND SOUTH CENTRAL INTO NORTHEAST IOWA. THE SHOWERS AND STORMS WERE MOVING EAST AT 25 MILES AN HOUR. KS
Special weather statement, Jun 17, 2:14 AM CDT, 1 hour before
IAZ002-003-006-007-010-011-013-014-015-170745- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 215 AM CDT SUN JUN 17 1990 THE FOLLOWING COUNTIES HAVE BEEN CLEARED FROM SEVERE THUNDERSTORM WATCH NUMBER 481. THUNDERSTORMS WILL STILL BE IN THESE AREAS... BUT THEY ARE NOT EXPECTED TO BE SEVERE. ...NORTH CENTRAL... BUTLER CERRO GORDO FLOYD FRANKLIN HANCOCK HUMBOLDT MITCHELL WINNEBAGO WORTH WRIGHT ...NORTHEAST... ALLAMAKEE BLACK HAWK BREMER BUCHANAN CHICKASAW FAYETTE HOWARD WINNESHIEK ...CENTRAL... BOONE DALLAS GRUNDY HAMILTON HARDIN JASPER MARSHALL POLK STORY WEBSTER ...SOUTH CENTRAL... MADISON MARION WARREN SOME CITIES CLEARED INCLUDE... AMES BOONE CHARLES CITY DECORAH DES MOINES FORT DODGE I NDEPENDENCE INDIANOLA IOWA FALLS KNOXVILLE MARSHALLTOWN MASON CITY NEWTON OELWEIN PERRY WATERLOO WAVERLY WEBSTER CITY SCHUMACHER
Special weather statement, Jun 17, 2:28 AM CDT, 46 minutes before
IA002-003-007-170600 SPECIAL WEATHER STATEMENT AND WEATHER UPDATE FOR NORTHEAST IOWA NATIONAL WEATHER SERVICE WATERLOO IA 215 AM CDT SUN JUN 17 1990 AT 210 AM CDT SHOWERS AND THUNDERSTORMS CONTINUED OVER NORTHEAST IOWA WITH THE STRONGEST STORMS OCCURRING IN DUBUQUE COUNTY. THESE STORMS HAVE PRODUCED HEAVY RAINS...WINDS OF 30 TO 40 MPH...AND DEADLY LIGHTNING. OTHER STORMS WERE SCATTERED OVER BREMER AND FLOYD COUNTIES WITH HEAVY RAINS AND LIGHTNING BEING THE MAIN THREAT. THE STORMS WERE MOVING TO THE SOUTHEAST AT 30 TO 35 MPH. TEMPERATURES WERE IN THE MIDDLE 60S AND THE WINDS WERE FROM THE SOUTH/SOUTHEAST AT 5 TO 10 MPH. THE STRONGEST THUNDERSTORMS WILL HAVE PUSHED OUT OF NORTHEAST IOWA BY 300 AM CDT WHILE OTHER SCATTERED SHOWERS AND THUNDERSTORMS CONTINUE THROUGHOUT THE AREA. TEMPERATURES WILL HOLD IN THE MIDDLE 60S WHILE THE WINDS CONTINUE FROM THE SOUTH AT 5 TO 10 MPH. COLLAR
Special weather statement, Jun 17, 2:43 AM CDT, 31 minutes before
IAZALL-170830- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 240 AM CDT SUN JUN 17 1990 ...FLASH FLOOD WATCH FOR ALL OF IOWA TONIGHT... ...SEVERE THUNDERSTORM WATCH FOR PARTS OF SOUTHERN AND EASTERN IOWA UNTIL 4 AM... AT 228 AM...ISOLATED INTENSE THUNDERSTORMS EXTENDED FROM EAST CENTRAL INTO SOUTH CENTRAL IOWA. THE STORMS WERE BETWEEN CEDAR RAPIDS AND LAMONI NEAR NEW SHARON...OSKALOOSA...MELCHER/DALLAS...CHARITON AND CORYDON. EXCESSIVE RAINS...UP TO AN INCH IN AN HOURS TIME...AND STRONG WINDS TO 50 MILES AN HOUR ARE OCCURRING WITH THESE STORMS. ALSO...NUMEROUS SHOWERS AND SCATTERED STORMS COVERED THE SOUTHEAST TWO- THIRDS OF IOWA. THE SHOWERS A*ND STORMS WERE MOVING EAST AT 35 MILES AN HOUR. / WHILE MOST OF IOWA IS ALREADY WATER SATURATED...A SERIOS FLOOD PROBLEM CONTINUES. KS
Special weather statement, Jun 17, 3:08 AM CDT, 6 minutes before
IAZALL-170900- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 305 AM CDT SUN JUN 17 1990 ...FLASH FLOOD WATCH FOR ALL OF IOWA TONIGHT... ...SEVERE THUNDERSTORM WATCH FOR PARTS OF SOUTHERN AND EASTERN IOWA UNTIL 4 AM... AT 300 AM...ISOLATED INTENSE THUNDERSTORMS CONTINUED OVER EAST CENTRAL AND SOUTHEAST IOWA. THE STORMS WERE 10 TO 40 MILES NORTHEAST OF OTTUMWA NEAR SIGOURNEY...WHAT CHEER AND KEOTA. EXCESSIVE RAINS...UP TO AN INCH IN AN HOURS TIME...WIND GUSTS OF 40 TO 50 MILES AN HOUR AND SMALL HAIL WERE OCCURRING WITH THESE STORMS. IN ADDITION...NUMEROUS SHOWERS AND SCATTERED STORMS COVERED THE SOUTH- EAST HALF OF THE STATE. THE SHOWERS AND STORMS WERE MOVING EASDT AT 35 MILES AN HOUR. / WHILE MOST OF IOWA IS ALREADY WATER SATURATED...A SERIOUS FLOOD PROBLEM CONTINUES. KS
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 16, 7:17 PM CDT | Tornado Warning | DMX | Lucas | 18 min |
| Jun 16, 7:33 PM CDT | Tornado Warning | DMX | Monroe | 27 min |
| Jun 16, 9:03 PM CDT | Tornado Warning | DMX | Appanoose | 27 min |
| Jun 16, 9:29 PM CDT | Tornado Warning | DMX | Buena Vista | 31 min |
| Jun 16, 9:33 PM CDT | Severe Thunderstorm Warning | DMX | Clay, Palo Alto, Pocahontas | 42 min |
| Jun 16, 9:45 PM CDT | Tornado Warning | DMX | Appanoose | 30 min |
| Jun 16, 9:50 PM CDT | Severe Thunderstorm Warning | DMX | Humboldt, Kossuth | 40 min |
| Jun 16, 9:57 PM CDT | Tornado Warning | DMX | Van Buren | 33 min |
| Jun 16, 9:57 PM CDT | Tornado Warning | DMX | Monroe | 33 min |
| Jun 16, 10:16 PM CDT | Tornado Warning | DMX | Appanoose, Davis, Monroe, Wapello | 29 min |
| Jun 16, 10:17 PM CDT | Severe Thunderstorm Warning | DMX | Emmet | 28 min |
| Jun 16, 10:30 PM CDT | Severe Thunderstorm Warning | DMX | Webster, Wright | 45 min |
| Jun 16, 10:53 PM CDT | Tornado Warning | DMX | Jones | 37 min |
| Jun 16, 10:53 PM CDT | Tornado Warning | DMX | Jefferson, Van Buren | 37 min |
| Jun 16, 11:11 PM CDT | Severe Thunderstorm Warning | DMX | Hamilton | 49 min |
| Jun 16, 11:34 PM CDT | Severe Thunderstorm Warning | DMX | Jefferson, Van Buren | 26 min |
| Jun 16, 11:47 PM CDT | Severe Thunderstorm Warning | DMX | Audubon | 28 min |
| Jun 17, 4:09 AM CDT | Flash Flood Warning | DMX | Washington | 3 hr |
Nearby
Flash Flood Warnings in Iowa, 1990Every flash flood warning in 1990
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.