Alert archive / Iowa / Flash Flood Warnings in 1998
Flash Flood Warning 1, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Jun 14, 1998, 8:56 AM CDT for Cass County, Iowa. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 14, 1998, 8:56 AM CDT (13:56 UTC)
- Expired
- Jun 14, 1998, 11:55 AM CDT
- In force
- 3 hr
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Cass County, IA
The radar
The Des Moines radar (KDMX), 110 km from the middle of the area, began a volume at 14:00 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Topeka, KS (KTOP), launched 12:00Z, 1.9 hours before the alert went out and 266 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
- 332 J/kg
- Mixed-layer CIN
- -266 J/kg
- Mixed-layer LCL
- 923 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- -105 m²/s²
- 0-3 km storm-relative helicity
- 39 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KDSM 141356 FFWDSM IAC029-141655- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DES MOINES IA 856 AM CDT SUN JUN 14 1998 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * FLASH FLOOD WARNING FOR... CASS COUNTY IN SOUTHWESTERN IOWA * UNTIL 1155 AM CDT * AT 850 AM CDT... AREA LAW ENFORCEMENT INDICATED A THUNDERSTORM WITH VERY HEAVY RAIN OVER SOUTHWEST CASS COUNTY...MOVING SLOWLY NORTHEAST. AT 853 AM CDT...RADIO STATION KJAN REPORTED 4.75 INCHES OF RAIN SINCE MIDNIGHT. * HEAVY RAINFALL OF UP TO 6 INCHES HAS OCCURRED OVER SOUTHWEST CASS COUNTY SOUTH OF LEWIS. LAW ENFORCEMENT REPORTED WATER OVERTOPPING ROADS IN THE AREA AND HIGHWAY 48 HAS BEEN CLOSED. ALL CREEKS AND STREEMS IN THE COUNTY WILL RISE ABOVE FLOOD STAGE QUICKLY. THERE HAVE BEEN REPORTS OF PEOPLE STRANDED IN A CAMPGROUND 2 MILES NORTH OF GRISWOLD SOME STREAMS AFFECTED INCLUDE... TURKEY CREEK UPPER REACHES OF THE NODAWAY SEVEN MILE CREEK DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD!
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
Local storm report, Jun 14, 3:28 AM CDT, 5 hours 28 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
328 AM CDT SUN JUN 14 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0143 AM NEW MARKET IA 70 MPH TSTM GUST
06/14/98 TAYLOR TREES AND POWERLINES DOWN.
ONE HOUSE FIRE DUE TO
POWERLINE BEING PULLED FROM
AND LANDING ON HOUSE
0203 AM BEDFORD IA WIND DAMAGE
06/14/98 TAYLOR TREES DOWN IN TOWN
0233 AM CRESTON IA WIND DAMAGE
06/14/98 UNION LARGE TREES DOWN IN TOWN
SEARCY/SMALLSpecial weather statement, Jun 14, 4:09 AM CDT, 4 hours 47 minutes before
IAZ081-082-092>097-141000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 409 AM CDT SUN JUN 14 1998 TORNADO WATCH NUMBER 573 IS NO LONGER IN EFFECT ACROSS IOWA. SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS PORTIONS OF THE STATE EARLY THIS MORNING BUT THEY ARE NO LONGER EXPECTED TO BE SEVERE. EASTERLY WINDS COULD GUST UP TO 50 MPH AT TIMES BUT THESE OCCURRENCES WOULD NOT BE ASSOCIATED WITH THUNDERSTORMS. SMALL
Special weather statement, Jun 14, 6:30 AM CDT, 2 hours 26 minutes before
IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-081>086- 092>097-141800- CENTRAL IOWA THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE DES MOINES IA 630 AM CDT SUN JUN 14 1998 HAZARD--WIDELY SCATTERED THUNDERSTORMS CAPABLE OF PRODUCING HEAVY RAINFALL...PEA TO MARBLE SIZE HAIL AND WIND GUSTS TO 50 MPH. TIMING AND AREA OF CONCERN--THROUGH 10 AM IN AREAS ALONG AND WEST OF I35 AND EAST OF I35 DURING AFTER 10 AM. METEOROLOGICAL COMMENTS--LOW PRESSURE OVER EXTREME SOUTHEAST NEBRASKA AND A WARM FRONT EXTENDING EAST FROM THE LOW OVER MISSOURI WILL BE THE FOCUS FOR SHOWERS AND THUNDERSTORMS OVER THE STATE DURING THE NEXT 12 TO 24 HOURS. MID 60S TO LOW 70 DEGREE DEW POINTS WERE BEING PULLED NORTHWARD THIS MORNING BY 40 TO 50 KNOT LOW LEVEL WINDS WITH PRECIPITABLE WATER VALUES AROUND 1.5 INCHES. ALTHOUGH AN ISOLATED SEVERE STORM OR TWO IS POSSIBLE ACROSS THE STATE TODAY...IT APPEARS THE PRIMARY THREAT FROM THE THUNDERSTORMS WILL BE WITH HEAVY RAINFALL...PEA TO MARBLE SIZE HAIL ALONG WITH STRAIGHT LINE WIND GUSTS UP TO 50 MPH. AS THE UPPER LEVEL STORM SYSTEM MOVES OVER THE STATE TONIGHT THE PRIMARY THREAT WILL BE WITH ADDITIONAL HEAVY RAINFALL. PRECAUTIONS--ALTHOUGH SPOTTER ACTIVATION IS NOT ANTICIPATED... EMERGENCY MANAGERS AND SPOTTERS SHOULD BE ON THE LOOKOUT FOR AREAS THAT DO RECEIVE SIGNIFICANT RAINFALL TODAY WHICH MAY CAUSE RIVERS AND STREAMS TO MOVE OUT OF THEIR BANKS. KEEP ABREAST OF THE LATEST INFORMATION ON THIS FLOOD THREAT DURING THE DAY BY MONITORING YOUR LOCAL RADIO OR TELEVISION STATIONS.
Special weather statement, Jun 14, 6:30 AM CDT, 2 hours 26 minutes before
IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075-081>086- 092>097-141800- CENTRAL IOWA THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE DES MOINES IA 630 AM CDT SUN JUN 14 1998 HAZARD--WIDELY SCATTERED THUNDERSTORMS CAPABLE OF PRODUCING HEAVY RAINFALL...PEA TO MARBLE SIZE HAIL AND WIND GUSTS TO 50 MPH. TIMING AND AREA OF CONCERN--THROUGH 10 AM IN AREAS ALONG AND WEST OF I35 AND EAST OF I35 DURING AFTER 10 AM. METEOROLOGICAL COMMENTS--LOW PRESSURE OVER EXTREME SOUTHEAST NEBRASKA AND A WARM FRONT EXTENDING EAST FROM THE LOW OVER MISSOURI WILL BE THE FOCUS FOR SHOWERS AND THUNDERSTORMS OVER THE STATE DURING THE NEXT 12 TO 24 HOURS. MID 60S TO LOW 70 DEGREE DEW POINTS WERE BEING PULLED NORTHWARD THIS MORNING BY 40 TO 50 KNOT LOW LEVEL WINDS WITH PRECIPITABLE WATER VALUES AROUND 1.5 INCHES. ALTHOUGH AN ISOLATED SEVERE STORM OR TWO IS POSSIBLE ACROSS THE STATE TODAY...IT APPEARS THE PRIMARY THREAT FROM THE THUNDERSTORMS WILL BE WITH HEAVY RAINFALL...PEA TO MARBLE SIZE HAIL ALONG WITH STRAIGHT LINE WIND GUSTS UP TO 50 MPH. AS THE UPPER LEVEL STORM SYSTEM MOVES OVER THE STATE TONIGHT THE PRIMARY THREAT WILL BE WITH ADDITIONAL HEAVY RAINFALL. PRECAUTIONS--ALTHOUGH SPOTTER ACTIVATION IS NOT ANTICIPATED... EMERGENCY MANAGERS AND SPOTTERS SHOULD BE ON THE LOOKOUT FOR AREAS THAT DO RECEIVE SIGNIFICANT RAINFALL TODAY WHICH MAY CAUSE RIVERS AND STREAMS TO MOVE OUT OF THEIR BANKS. KEEP ABREAST OF THE LATEST INFORMATION ON THIS FLOOD THREAT DURING THE DAY BY MONITORING YOUR LOCAL RADIO OR TELEVISION STATIONS.
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 14, 1:10 AM CDT | Severe Thunderstorm Warning | DMX | Adams, Taylor | 35 min |
| Jun 14, 1:42 AM CDT | Severe Thunderstorm Warning | DMX | Adams, Taylor | 33 min |
| Jun 14, 2:06 AM CDT | Severe Thunderstorm Warning | DMX | Ringgold, Union | 49 min |
| Jun 14, 2:35 PM CDT | Tornado Warning | DMX | Davis | 45 min |
| Jun 14, 6:32 PM CDT | Flash Flood Warning | DMX | Audubon, Cass | 11 hr |
Nearby
Flash Flood Warnings in Iowa, 1998Every flash flood warning in 1998
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; radar from the NEXRAD Level II archive.