Alert archive / Iowa / Flash Flood Warnings in 1996
Flash Flood Warning 9, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Jun 20, 1996, 1:18 PM CDT for Audubon 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 20, 1996, 1:18 PM CDT (18:18 UTC)
- Expired
- Jun 20, 1996, 4:00 PM CDT
- In force
- 3 hr
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Audubon County, IA
The radar
The Des Moines radar (KDMX), 98 km from the middle of the area, began a volume at 18:18 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
Omaha, NE (KOAX), launched 12:00Z, 6.3 hours before the alert went out and 128 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
- 2885 J/kg
- Mixed-layer CIN
- -108 J/kg
- Mixed-layer LCL
- 717 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 145 m²/s²
- 0-3 km storm-relative helicity
- 147 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 10.7
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KDSM 201825
FFWDSM
IAC009-202100-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
118 PM CDT THU JUN 20 1996
* FLASH FLOOD WARNING FOR
AUDUBON COUNTY - WEST CENTRAL IOWA
* UNTIL 400 PM CDT
* SOME STREAMS AFFECTED
BLUEGRASS
EAST FORK OF THE NISHNABOTNA
EAST BRANCH OF THE WEST NISNABOTNA
* CAUSE AND EFFECT
HEAVY RAIN FELL ACROSS THIS AREA LAST NIGHT. NEWLY DEVELOPED
THUNDERSTORMS SINCE NOON HAVE REMAINED OVER AUDUBON COUNTY
PRODUCING HEAVY RAINFALL AND FLASH FLOODING. BLUEGRASS
CREEK IS OUT OF ITS BANKS IN AUDUBON THREATENING BUSINESSES.
* FORECAST CONDITIONS
AN ADDITIONAL 1 TO 3 INCHES OF RAIN IS EXPECTED TO FALL BETWEEN
130 AND 3 PM AGGREVATING THE SITUATION.
LEAVE FLOOD PRONE OR LOW LYING AREAS IMMEDIATELY.
FELDTWhat 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 20, 11:44 AM CDT, 1 hour 34 minutes before
IAZ023>025-033>036-044>048-057>061-070>075-081>086-092>097-201740- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1144 AM CDT THU JUN 20 1996 ...SEVERE THUNDERSTORM WATCH NUMBER 647 HAS BEEN CANCELLED... THE THUNDERSTORM COMPLEX THAT MOVED ACROSS WESTERN AND CENTRAL IOWA THIS MORNING HAS WEAKENED CONSIDERABLY...SO THE SEVERE THUNDERSTORM WATCH PREVIOUSLY IN EFFECT HAS BEEN CANCELLED. SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS WESTERN AND CENTRAL IOWA INTO THE EARLY AFTERNOON...BUT THEY ARE NOT EXPECTED TO REACH SEVERE LIMITS AT THIS TIME. MORE THUNDERSTORMS ARE LIKELY LATER THIS AFTERNOON HOWEVER... ESPECIALLY ACROSS WESTERN IOWA. SCATTERED THUNDERSTORMS WERE ALREADY FORMING OVER NORTHEASTERN NEBRASKA AND SHOULD MOVE INTO THAT AREA LATER IN THE DAY. PERSONS ACROSS WESTERN AND CENTRAL IOWA SHOULD HEIGHTEN THEIR WEATHER AWARENESS AS MORE SEVERE WEATHER WATCHES MAY BE ISSUED LATER TODAY. SMALL
Local storm report, Jun 20, 12:40 PM CDT, 38 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA 1225 AM CST THU JUN 20 1996
TIME(CDT) .....CITY LOCATION..... ST ...EVENT/REMARKS...
DATE(CDT) ....COUNTY LOCATION....
1147 PM NORTH OF ODEBOLT IA 1.75 INCH HAIL 6/19/96 SAC 1247 AM NORTH OF ODEBOLT IA 1.75 INCH HAIL 6/20/96 SAC 0118 AM DENISON IA 1.75 INCH HAIL 6/20/96 CRAWFORD 0140 AM 6 N DENISON IA .75 INCH HAIL 6/20/96 CRAWFORD 0222 AM 10 NE AUDUBON IA 70 MPH WIND GUST
6/20/96 AUDUBON 0247 AM 10 NE AUDUBON IA WIND DAMAGE LARGE TREES 6/20/96 AUDUBON DAMAGED 0941 AM 10 SW AUDUBON IA WIND DAMAGE LARGE TREES 6/20/96 AUDUBON DOWN 0945 AM AUDUBON IA WIND DAMAGE POWER LINES 6/20/96 AUDUBON DOWN 1010 AM 5 NE GUTHRIE CENTER IA .75 INCH HAIL 6/20/96 GUTHRIE 1015 AM STUART IA WIND DAMAGE LARGE TREES 6/20/96 GUTHRIE DOWN AND CAR DAMAGE 1056 AM CRESTON IA 59 MPH WIND GUST 6/20/96 UNION
Local storm report, Jun 20, 12:40 PM CDT, 38 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED TIME NATIONAL WEATHER SERVICE DES MOINES IA 1240 PM CST THU JUN 20 1996 TIME(CDT) .....CITY LOCATION..... ST ...EVENT/REMARKS... DATE(CDT) ....COUNTY LOCATION.... 1147 PM NORTH OF ODEBOLT IA 1.75 INCH HAIL 6/19/96 SAC 1247 AM NORTH OF ODEBOLT IA 1.75 INCH HAIL 6/20/96 SAC 0118 AM DENISON IA 1.75 INCH HAIL 6/20/96 CRAWFORD 0140 AM 6 N DENISON IA .75 INCH HAIL 6/20/96 CRAWFORD 0222 AM 10 NE AUDUBON IA 70 MPH WIND GUST 6/20/96 AUDUBON 0247 AM 10 NE AUDUBON IA WIND DAMAGE LARGE TREES 6/20/96 AUDUBON DAMAGED 0941 AM 10 SW AUDUBON IA WIND DAMAGE LARGE TREES 6/20/96 AUDUBON DOWN 0945 AM AUDUBON IA WIND DAMAGE POWER LINES 6/20/96 AUDUBON DOWN 1010 AM 5 NE GUTHRIE CENTER IA .75 INCH HAIL 6/20/96 GUTHRIE 1015 AM STUART IA WIND DAMAGE LARGE TREES 6/20/96 GUTHRIE DOWN AND CAR DAMAGE 1056 AM CRESTON IA 59 MPH WIND GUST 6/20/96 UNION JOHNSON
Local storm report, Jun 20, 12:43 PM CDT, 35 minutes before
PRELIMINARY LOCAL STORM REPORT NATIONAL WEATHER SERVICE DES MOINES IA 1243 PM CST THU JUN 20 1996 TIME(CDT) .....CITY LOCATION..... ST ...EVENT/REMARKS... DATE(CDT) ....COUNTY LOCATION.... 1230 AM SCHALLER IA 1.75 INCH HAIL 6/20/96 SAC 0230 AM 10 NE AUDUBON IA NUMEROUS LARGE TREES DOWN 6/20/96 AUDONBON JOHNSON
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 11:44 PM CDT | Severe Thunderstorm Warning | DMX | Sac | 31 min |
| Jun 20, 12:39 AM CDT | Severe Thunderstorm Warning | DMX | Sac | 21 min |
| Jun 20, 1:00 AM CDT | Severe Thunderstorm Warning | DMX | Crawford | 25 min |
| Jun 20, 1:16 AM CDT | Flash Flood Warning | DMX | Sac | 3 hr |
| Jun 20, 1:23 AM CDT | Severe Thunderstorm Warning | DMX | Crawford | 32 min |
| Jun 20, 9:25 AM CDT | Severe Thunderstorm Warning | DMX | Audubon, Cass | 30 min |
| Jun 20, 9:49 AM CDT | Severe Thunderstorm Warning | DMX | Adair, Guthrie | 41 min |
| Jun 20, 10:16 AM CDT | Severe Thunderstorm Warning | DMX | Dallas, Madison | 44 min |
| Jun 20, 10:36 AM CDT | Severe Thunderstorm Warning | DMX | Polk, Warren | 39 min |
| Jun 20, 10:51 AM CDT | Severe Thunderstorm Warning | DMX | Madison, Union | 29 min |
| Jun 20, 4:23 PM CDT | Severe Thunderstorm Warning | DMX | Crawford | 37 min |
| Jun 20, 5:11 PM CDT | Severe Thunderstorm Warning | DMX | Crawford | 34 min |
| Jun 20, 5:32 PM CDT | Severe Thunderstorm Warning | DMX | Crawford | 43 min |
Nearby
Flash Flood Warnings in Iowa, 1996Every flash flood warning in 1996
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.