Alert archive / Iowa / Flash Flood Warnings in 2017
Flash Flood Warning 2, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Jun 29, 2017, 5:09 PM CDT for 4 counties in 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
- Jun 29, 2017, 5:09 PM CDT (22:09 UTC)
- Expired
- Jun 29, 2017, 11:15 PM CDT
- In force
- 6 hr
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Butler County, IA, Franklin County, IA, Grundy County, IA, Hardin County, IA
The radar
The Des Moines radar (KDMX), 119 km from the middle of the area, began a volume at 22:10 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 |
|---|---|---|---|
| Jun 29, 8:12 PM CDT | FLASH FLOOD | 7 Wsw Geneva, IA | LAW ENFORCEMENT REPORTED WATER OVER THE ROAD ALONG 70TH NEAR AND JUST WEST OF BRADFORD. |
| Jun 29, 8:13 PM CDT | FLASH FLOOD | 5 Sw Geneva, IA | LAW ENFORCEMENT REPORTED WATER OVER THE ROAD/CLOSURE ALONG HIGHWAY 65 AT 70TH ST. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 10.2 hours before the alert went out and 228 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
- 27 J/kg
- Mixed-layer CIN
- -369 J/kg
- Mixed-layer LCL
- 968 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 163 m²/s²
- 0-3 km storm-relative helicity
- 175 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
083 WGUS53 KDMX 292209 FFWDMX IAC023-069-075-083-300415- /O.NEW.KDMX.FF.W.0002.170629T2209Z-170630T0415Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Des Moines IA 509 PM CDT THU JUN 29 2017 The National Weather Service in Des Moines has issued a * Flash Flood Warning for... Northeastern Hardin County in central Iowa... Southeastern Franklin County in north central Iowa... Northwestern Grundy County in central Iowa... Southwestern Butler County in north central Iowa... * Until 1115 PM CDT Thursday. * At 508 PM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Flash flooding is expected to begin shortly. The heaviest rain has fallen in southwestern Butler County. * Some locations that will experience flooding include... Iowa Falls, Parkersburg, Ackley, Aplington, Stout, Geneva, Bradford and Ackley Municipal Airport. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && LAT...LON 4271 9269 4249 9268 4248 9327 4269 9325 $$ Zogg
2 follow-up statements
708 WGUS73 KDMX 300014 FFSDMX Flash Flood Statement National Weather Service Des Moines IA 714 PM CDT THU JUN 29 2017 IAC023-069-075-083-300415- /O.CON.KDMX.FF.W.0002.000000T0000Z-170630T0415Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Hardin IA-Franklin IA-Grundy IA-Butler IA- 714 PM CDT THU JUN 29 2017 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT FOR NORTHEASTERN HARDIN...SOUTHEASTERN FRANKLIN...NORTHWESTERN GRUNDY AND SOUTHWESTERN BUTLER COUNTIES... At 713 PM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Doppler radar estimates that as much as 3.5 to 4.5 inches of rain has fallen, with the heaviest amounts in southeastern Franklin County. Some locations that will experience flooding include... Iowa Falls, Parkersburg, Ackley, Aplington, Stout, Geneva, Bradford and Ackley Municipal Airport. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && LAT...LON 4271 9269 4249 9268 4248 9327 4269 9325 $$ Zogg
734 WGUS73 KDMX 300420 FFSDMX Flash Flood Statement National Weather Service Des Moines IA 1120 PM CDT THU JUN 29 2017 IAC023-069-075-083-300429- /O.EXP.KDMX.FF.W.0002.000000T0000Z-170630T0415Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Hardin IA-Franklin IA-Grundy IA-Butler IA- 1120 PM CDT THU JUN 29 2017 ...THE FLASH FLOOD WARNING FOR NORTHEASTERN HARDIN...SOUTHEASTERN FRANKLIN...NORTHWESTERN GRUNDY AND SOUTHWESTERN BUTLER COUNTIES HAS EXPIRED... The rain has ended and flood waters are receding. Flooding is no longer expected to pose a threat. Please continue to heed any remaining road closures. LAT...LON 4271 9269 4249 9268 4248 9327 4269 9325 $$ Small
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 28, 7:42 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk, Grundy, Tama | 48 min |
| Jun 28, 8:38 PM CDT | Severe Thunderstorm Warning | DMX | Ringgold, Taylor | 40 min |
| Jun 29, 3:44 AM CDT | Flash Flood Watch | DMX | Adams, Decatur, Ringgold, Taylor | 19 hr |
| Jun 29, 5:11 PM CDT | Severe Thunderstorm Warning | DMX | Butler, Franklin | 49 min |
| Jun 29, 6:15 PM CDT | Severe Thunderstorm Warning | DMX | Crawford | 45 min |
| Jun 29, 6:23 PM CDT | Severe Thunderstorm Warning | DMX | Palo Alto | 35 min |
| Jun 29, 6:36 PM CDT | Severe Thunderstorm Warning | DMX | Palo Alto | 20 min |
Nearby
Flash Flood Warnings in Iowa, 2017Every flash flood warning in 2017
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.