Alert archive / Iowa / Flash Flood Warnings in 2004
Flash Flood Warning 55, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Sep 18, 2004, 3:11 AM CDT for Adams County, Iowa. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Sep 18, 2004, 3:11 AM CDT (08:11 UTC)
- Expired
- Sep 18, 2004, 9:15 AM CDT
- In force
- 6 hr
- Issued by
- NWS Des Moines, IA
- Area
- Counties, with a storm outline in the text
County Adams County, IA
The radar
The Des Moines radar (KDMX), 109 km from the middle of the area, began a volume at 08:11 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 00:00Z, 8.2 hours before the alert went out and 145 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2056 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 118 m²/s²
- 0-3 km storm-relative helicity
- 217 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS53 KDMX 180815 FFWDMX IAC003-181415- /X.NEW.KDMX.FF.W.0007.040918T0811Z-040918T1415Z/ /0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DES MOINES IA 311 AM CDT SAT SEP 18 2004 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * FLASH FLOOD WARNING FOR... ADAMS COUNTY IN SOUTHWEST IOWA. * UNTIL 915 AM CDT. * AT 307 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. DOPPLER RADAR ESTIMATED THREE TO FIVE INCHES OF RAIN HAS FALLEN ACROSS PORTIONS OF THE COUNTY. * SLOW MOVING THUNDERSTORMS ARE PRODUCING TORRENTIAL RAINFALL IN THE WARNED AREA. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...CORNING...CARBON...CORNING MUNICIPAL AIRPORT...NODAWAY AND PRESCOTT. PERSONS THAT LIVE ALONG THE BROWN BRANCH...THE MOUNT ZION BRANCH AND KEMP CREEK SHOULD MONITOR THE POTENTIAL FOR SIGNIFICANT RISES ALONG THESE STREAMS. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN DES MOINES. LAT...LON 4115 9451 4092 9450 4092 9491 4115 9492 $$ DONAVON
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 17, 7:18 PM CDT | Severe Thunderstorm Warning | DMX | Hamilton | 42 min |
| Sep 18, 1:20 AM CDT | Severe Thunderstorm Warning | DMX | Taylor | 40 min |
| Sep 18, 2:16 AM CDT | Severe Thunderstorm Warning | DMX | Taylor | 44 min |
| Sep 18, 2:29 AM CDT | Flash Flood Warning | DMX | Taylor | 6 hr |
| Sep 18, 2:40 AM CDT | Severe Thunderstorm Warning | DMX | Adams | 50 min |
| Sep 18, 4:10 AM CDT | Severe Thunderstorm Warning | DMX | Adams | 50 min |
Nearby
Flash Flood Warnings in Iowa, 2004Every flash flood warning in 2004
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.