Alert archive / Iowa / Flash Flood Warnings in 2016
Flash Flood Warning 32, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Sep 22, 2016, 4:13 AM CDT for Cerro Gordo County, Hancock County, Iowa. It was in force for 6 hr. 12 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
- Sep 22, 2016, 4:13 AM CDT (09:13 UTC)
- Expired
- Sep 22, 2016, 10:15 AM CDT
- In force
- 6 hr
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Cerro Gordo County, IA, Hancock County, IA
The radar
The Des Moines radar (KDMX), 155 km from the middle of the area, began a volume at 09:14 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 |
|---|---|---|---|
| Sep 22, 6:00 AM CDT | HEAVY RAIN 2.45 | 1 N Britt, IA | COCORAHS STATION BRITT /IA-HN-2/. |
| Sep 22, 6:20 AM CDT | FLASH FLOOD | Rockwell, IA | BARRICADES PUT UP DUE TO STREET FLOODING ALONG HIGHWAY 65 NEAR ROCKWELL. |
| Sep 22, 6:53 AM CDT | HEAVY RAIN 2.53 | 3 Ne Clear Lake, IA | ASOS STATION MASON CITY MUNICIPAL AIRPORT /MCW/. |
| Sep 22, 7:00 AM CDT | HEAVY RAIN 2.26 | Kanawha, IA | . |
| Sep 22, 7:00 AM CDT | HEAVY RAIN 2.26 | Kanawha, IA | CO-OP OBSERVER STATION KANAWHA /KANI4/. |
| Sep 22, 7:00 AM CDT | HEAVY RAIN 2.38 | Mason City, IA | KIMT TV. |
| Sep 22, 7:00 AM CDT | HEAVY RAIN 2.4 | Swaledale, IA | COCORAHS STATION SWALEDALE /IA-CG-7/. |
| Sep 22, 7:00 AM CDT | HEAVY RAIN 2.53 | Mason City, IA | MASON CITY AIRPORT. |
| Sep 22, 7:00 AM CDT | HEAVY RAIN 2.61 | 3 Ene Mason City, IA | COCORAHS STATION 3 E MASON CITY /IA-CG-5/. |
| Sep 22, 7:00 AM CDT | HEAVY RAIN 2.88 | 2 N Mason City, IA | . |
| Sep 22, 7:00 AM CDT | HEAVY RAIN 4 | Clear Lake, IA | VIA SOCIAL MEDIA. |
| Sep 22, 10:00 AM CDT | HEAVY RAIN 2.27 | 1 Sw Clear Lake, IA | MESONET STATION CLEAR LAKE /CLKI4/. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 9.2 hours before the alert went out and 195 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
- 144 J/kg
- Mixed-layer CIN
- -361 J/kg
- Mixed-layer LCL
- 641 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 428 m²/s²
- 0-3 km storm-relative helicity
- 596 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 11.6
The text
As transmitted.
720 WGUS53 KDMX 220913 FFWDMX IAC033-081-221515- /O.NEW.KDMX.FF.W.0032.160922T0913Z-160922T1515Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DES MOINES IA 413 AM CDT THU SEP 22 2016 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * FLASH FLOOD WARNING FOR... HANCOCK COUNTY IN NORTH CENTRAL IOWA... CERRO GORDO COUNTY IN NORTH CENTRAL IOWA... * UNTIL 1015 AM CDT THURSDAY. * AT 411 AM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. ONE TO TWO INCHES OF RAIN HAS ALREADY FALLEN. SOME AREAS OF CERRO GORDO COUNTY SAW SEVERAL INCHES OF RAIN LAST EVENING AND ANY ADDITIONAL RAINFALL MAY EXACERBATE ANY ONGOING FLOODING. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY. * SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... MASON CITY...GARNER...BRITT...ROCKWELL...CLEAR LAKE...EAGLE LAKE... MASON CITY MUNICIPAL AIRPORT...VENTURA...KANAWHA...KLEMME... THORNTON...PLYMOUTH...CORWITH...MESERVEY...SWALEDALE...ROCK FALLS...GOODELL...DUNCAN...MILLER AND DOUGHERTY. THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 178 AND 200. PRECAUTIONARY/PREPAREDNESS ACTIONS... BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. && LAT...LON 4325 9303 4291 9303 4291 9397 4320 9397 $$ COGIL
2 follow-up statements
644 WGUS73 KDMX 221147 FFSDMX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 647 AM CDT THU SEP 22 2016 IAC033-081-221515- /O.CON.KDMX.FF.W.0032.000000T0000Z-160922T1515Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ HANCOCK IA-CERRO GORDO IA- 647 AM CDT THU SEP 22 2016 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1015 AM CDT FOR HANCOCK AND CERRO GORDO COUNTIES... AT 646 AM CDT...LOCAL LAW ENFORCEMENT REPORTED FLASH FLOODING ALONG HIGHWAY 65 NEAR ROCKWELL. THE ROAD HAS BEEN CLOSED DUE TO HIGH WATER. NUMEROUS OTHER ROADS IN EASTERN CERRO GORDO HAVE BEEN IMPACTED BY HIGH WATER AS WELL. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... MASON CITY...GARNER...BRITT...ROCKWELL...CLEAR LAKE...EAGLE LAKE... MASON CITY MUNICIPAL AIRPORT...VENTURA...KANAWHA...KLEMME... THORNTON...PLYMOUTH...CORWITH...MESERVEY...SWALEDALE...ROCK FALLS... GOODELL...DUNCAN...MILLER AND DOUGHERTY. THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 178 AND 200. PRECAUTIONARY/PREPAREDNESS ACTIONS... TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD DEATHS OCCUR IN VEHICLES. && LAT...LON 4325 9303 4291 9303 4291 9397 4320 9397 $$ COGIL
437 WGUS73 KDMX 221508 FFSDMX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 1008 AM CDT THU SEP 22 2016 IAC033-081-221511- /O.CAN.KDMX.FF.W.0032.000000T0000Z-160922T1515Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ HANCOCK IA-CERRO GORDO IA- 1008 AM CDT THU SEP 22 2016 ...THE FLASH FLOOD WARNING FOR HANCOCK AND CERRO GORDO COUNTIES IS CANCELLED... THE THREAT FOR FLASH FLOODING ACROSS HANCOCK AND CERRO GORDO COUNTIES HAS ENDED. HOWEVER, LIGHT TO MODERATE RAIN WILL CONTINUE OFF AND ON TODAY WITH THE POTENTIAL FOR ANOTHER HALF INCH OF RAINFALL. HOWEVER, RESIDUAL AREAL FLOODING CONTINUES MAINLY ACROSS CERRO GORDO COUNTY AND AN AREAL FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 PM TONIGHT. PLEASE CONTINUE TO HEED ANY REMAINING ROAD CLOSURES AND EVACUATION NOTICES AND BE AWARE THAT MANY RIVERS, CREEKS AND STREAMS MAY BE OUT OF THEIR BANKS. LAT...LON 4325 9303 4291 9303 4291 9397 4320 9397 $$ MF
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 21, 7:05 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo | 55 min |
| Sep 21, 7:16 PM CDT | Tornado Warning | DMX | Cerro Gordo | 13 min |
| Sep 21, 7:43 PM CDT | Tornado Warning | DMX | Bremer, Butler | 47 min |
| Sep 21, 8:26 PM CDT | Special Weather Statement | DMX | Bremer | 64 min |
| Sep 21, 8:54 PM CDT | Flash Flood Warning | DMX | Bremer | 6 hr |
| Sep 21, 9:05 PM CDT | Special Weather Statement | DMX | Bremer | 40 min |
| Sep 21, 9:39 PM CDT | River Flood Warning | DMX | Black Hawk, Bremer, Butler | 5 days |
| Sep 21, 9:40 PM CDT | River Flood Warning | DMX | Black Hawk | 8 days |
| Sep 21, 9:41 PM CDT | River Flood Warning | DMX | Black Hawk, Bremer, Butler | 6 days |
| Sep 21, 9:50 PM CDT | River Flood Warning | DMX | Cerro Gordo, Floyd, Worth | 4 days |
| Sep 21, 10:51 PM CDT | Areal Flood Warning | DMX | Cerro Gordo, Franklin, Worth | 48 hr |
| Sep 22, 3:05 AM CDT | Areal Flood Warning | DMX | Bremer | 24 hr |
| Sep 22, 7:00 AM CDT | Flash Flood Warning | DMX | Butler | 4 hr |
| Sep 22, 10:22 AM CDT | River Flood Warning | DMX | Wright | 6 days |
| Sep 22, 11:23 AM CDT | Areal Flood Warning | DMX | Bremer, Butler | 24 hr |
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.