Alert archive / Iowa / Flash Flood Warnings in 2016
Flash Flood Warning 38, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Sep 23, 2016, 5:42 AM CDT for Palo Alto County, Pocahontas County, Iowa. It was in force for 4 hr. 1 report 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 23, 2016, 5:42 AM CDT (10:42 UTC)
- Expired
- Sep 23, 2016, 9:45 AM CDT
- In force
- 4 hr
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Palo Alto County, IA, Pocahontas County, IA
The radar
The Des Moines radar (KDMX), 162 km from the middle of the area, began a volume at 10:43 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 23, 8:39 AM CDT | HEAVY RAIN 3.5 | Emmetsburg, IA | STORM TOTAL RAINFALL THROUGH 8AM. . |
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, 10.7 hours before the alert went out and 219 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
- 579 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 26 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
433 WGUS53 KDMX 231042 FFWDMX IAC147-151-231445- /O.NEW.KDMX.FF.W.0038.160923T1042Z-160923T1445Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DES MOINES IA 542 AM CDT FRI SEP 23 2016 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * FLASH FLOOD WARNING FOR... PALO ALTO COUNTY IN NORTHWESTERN IOWA... NORTHERN POCAHONTAS COUNTY IN NORTHWESTERN IOWA... * UNTIL 945 AM CDT. * AT 541 AM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. RADAR HAS ESTIMATED 2 TO 4 INCHES OF RAIN HAVE FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY. ADDITIONAL HEAVY RAIN OF 1 TO 3 INCHES IS EXPECTED. * SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... EMMETSBURG...LAURENS...FIVE ISLAND LAKE...RUSH LAKE...SILVER LAKE...LOST ISLAND LAKE...WEST BEND...RUTHVEN...ROLFE...GILMORE CITY...MALLARD...AYRSHIRE...HAVELOCK...CYLINDER...PLOVER... CURLEW...RODMAN...KEARNEY STATE PARK...LOST ISLAND LAKE STATE PARK AND EMMETSBURG MUNICIPAL AIRPORT. PRECAUTIONARY/PREPAREDNESS ACTIONS... TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD DEATHS OCCUR IN VEHICLES. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...COUNTRY ROADS...FARMLAND...AND OTHER LOW LYING SPOTS. && LAT...LON 4315 9444 4271 9445 4285 9491 4326 9491 $$ COGIL
1 follow-up statement
922 WGUS73 KDMX 231439 FFSDMX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 939 AM CDT FRI SEP 23 2016 IAC147-151-231446- /O.EXP.KDMX.FF.W.0038.000000T0000Z-160923T1445Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ PALO ALTO IA-POCAHONTAS IA- 939 AM CDT FRI SEP 23 2016 ...THE FLASH FLOOD WARNING FOR PALO ALTO AND NORTHERN POCAHONTAS COUNTIES WILL EXPIRE AT 945 AM CDT... RADAR ESTIMATES INDICATE THAT 2 TO 5 INCHES OF RAIN FELL OVERNIGHT ACROSS THE WARNED AREA. HOWEVER...THE HEAVY RAIN HAS NOW ENDED AND THE THREAT FOR FLASH FLOODING HAS ENDED. HOWEVER...MINOR OVERLAND AND SMALL STREAM FLOODING WILL CONTINUE ALTHOUGH IMPACTS SHOULD GENERALLY BE MINOR. PLEASE CONTINUE TO HEED ANY REMAINING ROAD CLOSURES. LAT...LON 4315 9444 4271 9445 4285 9491 4326 9491 $$ MF
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 22, 9:16 PM CDT | Special Weather Statement | DMX | Polk | 29 min |
| Sep 22, 9:37 PM CDT | Flash Flood Warning | DMX | Story | 6 hr |
| Sep 22, 11:24 PM CDT | Flash Flood Warning | DMX | Bremer, Butler, Cerro Gordo, Franklin | 6 hr |
| Sep 23, 12:22 AM CDT | River Flood Warning | DMX | Story | 31 hr |
| Sep 23, 1:14 AM CDT | River Flood Warning | DMX | Polk, Story | 33 hr |
| Sep 23, 1:22 AM CDT | Flash Flood Warning | DMX | Hancock, Wright | 6 hr |
| Sep 23, 3:36 AM CDT | Flash Flood Warning | DMX | Franklin, Humboldt, Kossuth, Wright | 6 hr |
| Sep 23, 5:19 AM CDT | Areal Flood Warning | DMX | Butler, Franklin | 6 hr |
| Sep 23, 7:15 AM CDT | Areal Flood Warning | DMX | Hancock, Wright | 4 hr |
| Sep 23, 11:12 AM CDT | Areal Flood Warning | DMX | Black Hawk, Bremer, Butler, Franklin, Hancock, Wright | 48 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.