Alert archive / Iowa / Flash Flood Warnings in 2016
Flash Flood Warning 18, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Aug 10, 2016, 5:25 PM CDT for Dallas County, Iowa. It was in force for 6 hr. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 10, 2016, 5:25 PM CDT (22:25 UTC)
- Expired
- Aug 10, 2016, 11:30 PM CDT
- In force
- 6 hr
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Flood severity
- None
County Dallas County, IA
The radar
The Des Moines radar (KDMX), 19 km from the middle of the area, began a volume at 22:25 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 10, 5:58 PM CDT | FLASH FLOOD | 5 Wnw Grimes, IA | UP TO A FOOT OF WATER OVER THE ROAD ALONG HIGHWAY 44 ( 240TH STREET ) AND V AVENUE IN DALLAS COUNTY. . |
| Aug 10, 9:10 PM CDT | HEAVY RAIN 3.6 | 2 Ene Dallas Center, IA | PUBLIC REPORT OF 3.6 INCHES OF RAIN NE OF DALLAS CENTER. REPORT VIA SOCIAL MEDIA. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 10.4 hours before the alert went out and 206 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
- 2010 J/kg
- Mixed-layer CIN
- -74 J/kg
- Mixed-layer LCL
- 1074 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 121 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
505 WGUS53 KDMX 102225 FFWDMX IAC049-110430- /O.NEW.KDMX.FF.W.0018.160810T2225Z-160811T0430Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DES MOINES IA 525 PM CDT WED AUG 10 2016 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHEASTERN DALLAS COUNTY IN CENTRAL IOWA... * UNTIL 1130 PM CDT WEDNESDAY * AT 524 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. AS MUCH AS TWO TO THREE INCHES OF RAIN HAS ALREADY FALLEN...AND AS MUCH AS 1 TO 1.5 INCHES OF RAIN IS EXPECTED OVER THE NEXT HOUR. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY. * SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... URBANDALE...CLIVE...WAUKEE...GRIMES...ADEL...DALLAS CENTER... GRANGER AND MINBURN. PRECAUTIONARY/PREPAREDNESS ACTIONS... TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD DEATHS OCCUR IN VEHICLES. && LAT...LON 4160 9403 4181 9403 4181 9382 4160 9381 $$ ZOGG
2 follow-up statements
211 WGUS73 KDMX 102303 FFSDMX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 603 PM CDT WED AUG 10 2016 IAC049-110430- /O.CON.KDMX.FF.W.0018.000000T0000Z-160811T0430Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ DALLAS IA- 603 PM CDT WED AUG 10 2016 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT FOR NORTHEASTERN DALLAS COUNTY... AT 558 PM CDT...EMERGENCY MANAGEMENT REPORTED FLASH FLOODING IN THE WARNED AREA. WATER UP TO 1 FOOT DEEP WAS OVER V AVENUE NEAR HIGHWAY 44. RADAR ESTIMATES THAT AS MUCH AS 3 TO 4 INCHES OF RAIN HAS ALREADY FALLEN IN THE WARNED AREA. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... URBANDALE...CLIVE...WAUKEE...GRIMES...ADEL...DALLAS CENTER...GRANGER AND MINBURN. PRECAUTIONARY/PREPAREDNESS ACTIONS... TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD DEATHS OCCUR IN VEHICLES. && LAT...LON 4160 9403 4181 9403 4181 9382 4160 9381 $$ ZOGG
026 WGUS73 KDMX 110149 FFSDMX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 849 PM CDT WED AUG 10 2016 IAC049-110159- /O.CAN.KDMX.FF.W.0018.000000T0000Z-160811T0430Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ DALLAS IA- 849 PM CDT WED AUG 10 2016 ...THE FLASH FLOOD WARNING FOR NORTHEASTERN DALLAS COUNTY IS CANCELLED... FLOOD WATERS HAVE RECEDED. FLOODING IS NO LONGER EXPECTED TO POSE A THREAT. PLEASE CONTINUE TO HEED ANY REMAINING ROAD CLOSURES. LAT...LON 4160 9403 4181 9403 4181 9382 4160 9381 $$ ZOGG
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 3:47 PM CDT | Severe Thunderstorm Warning | DMX | Polk | 28 min |
| Aug 10, 3:54 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun | 36 min |
| Aug 10, 4:55 PM CDT | Severe Thunderstorm Warning | DMX | Palo Alto, Pocahontas | 35 min |
| Aug 10, 5:02 PM CDT | Severe Thunderstorm Warning | DMX | Dallas | 28 min |
| Aug 10, 5:47 PM CDT | Special Weather Statement | DMX | Wright | 43 min |
| Aug 10, 6:09 PM CDT | Special Weather Statement | DMX | Polk | 51 min |
| Aug 10, 6:12 PM CDT | Special Weather Statement | DMX | Kossuth | 18 min |
Nearby
Flash Flood Warnings in Iowa, 2016Every flash flood warning in 2016
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.