Alert archive / Iowa / Flash Flood Warnings in 2016
Flash Flood Warning 20, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Aug 19, 2016, 5:49 PM CDT for 4 counties in Iowa. It was in force for 6 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
- Aug 19, 2016, 5:49 PM CDT (22:49 UTC)
- Expired
- Aug 19, 2016, 11:45 PM CDT
- In force
- 6 hr
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Hamilton County, IA, Humboldt County, IA, Webster County, IA, Wright County, IA
The radar
The Des Moines radar (KDMX), 108 km from the middle of the area, began a volume at 22:50 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 19, 7:30 PM CDT | FLASH FLOOD | Vincent, IA | FLASH FLOODING MAKING ELM STREET IMPASSABLE. REPORTED VIA SOCIAL MEDIA. TIME ESTIMATED. |
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 12:00Z, 10.8 hours before the alert went out and 239 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
- 10 J/kg
- Mixed-layer CIN
- -274 J/kg
- Mixed-layer LCL
- 805 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- -260 m²/s²
- 0-3 km storm-relative helicity
- -249 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
127
WGUS53 KDMX 192249
FFWDMX
IAC079-091-187-197-200445-
/O.NEW.KDMX.FF.W.0020.160819T2249Z-160820T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
549 PM CDT FRI AUG 19 2016
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHEASTERN WEBSTER COUNTY IN CENTRAL IOWA...
NORTHWESTERN HAMILTON COUNTY IN CENTRAL IOWA...
SOUTHEASTERN HUMBOLDT COUNTY IN NORTH CENTRAL IOWA...
WRIGHT COUNTY IN NORTH CENTRAL IOWA...
* UNTIL 1145 PM CDT
* AT 546 PM CDT...DOPPLER RADAR INDICATED ADDITIONAL THUNDERSTORMS
WITH HEAVY RAIN ENTERING THE WARNED AREA. AS MUCH AS 4 TO 5 INCHES
OF RAIN HAVE ALREADY FALLEN ACROSS THE WARNED AREA...WITH THE
HEAVIEST AMOUNTS FALLING ACROSS SOUTH CENTRAL AND SOUTHWEST WRIGHT
COUNTY. ADDITIONAL RAINFALL OF 1 TO 2 INCHES IS EXPECTED
THIS EVENING. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
FORT DODGE...CLARION...EAGLE GROVE...BELMOND...FORT DODGE REGIONAL
AIRPORT...ELM LAKE...BIG WALL LAKE...GOLDFIELD...BADGER...DOWS...
THOR...VINCENT...WOOLSTOCK...ROWAN...GALT...CLARION MUNICIPAL
AIRPORT...EAGLE GROVE MUNICIPAL AIRPORT AND SPORTSMAN PARK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.
&&
LAT...LON 4286 9352 4281 9350 4263 9350 4243 9421
4263 9432
$$
ZOGG3 follow-up statements
567
WGUS73 KDMX 200051
FFSDMX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
751 PM CDT FRI AUG 19 2016
IAC079-091-187-197-200445-
/O.CON.KDMX.FF.W.0020.000000T0000Z-160820T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WEBSTER IA-HAMILTON IA-HUMBOLDT IA-WRIGHT IA-
751 PM CDT FRI AUG 19 2016
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1145 PM CDT FOR
NORTHEASTERN WEBSTER...NORTHWESTERN HAMILTON...SOUTHEASTERN HUMBOLDT
AND WRIGHT COUNTIES...
AT 750 PM CDT...DOPPLER RADAR INDICATED HEAVY RAIN ACROSS THE WARNED
AREA. AS MUCH AS 5 TO 6 INCHES OF RAIN HAS FALLEN...WITH THE
GREATEST AMOUNTS FALLING SOUTHEAST OF EAGLE GROVE IN SOUTHWESTERN
WRIGHT COUNTY. FLASH FLOODING IS EITHER UNDERWAY OR IS EXPECTED TO
BEGIN SHORTLY.
SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
FORT DODGE...CLARION...EAGLE GROVE...BELMOND...FORT DODGE REGIONAL
AIRPORT...ELM LAKE...BIG WALL LAKE...GOLDFIELD...BADGER...DOWS...
THOR...VINCENT...WOOLSTOCK...ROWAN...GALT...CLARION MUNICIPAL
AIRPORT...EAGLE GROVE MUNICIPAL AIRPORT AND SPORTSMAN PARK.
ADDITIONAL RAINFALL AMOUNTS OF UP TO 1 INCH ARE POSSIBLE IN THE
WARNED AREA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.
&&
LAT...LON 4286 9352 4281 9350 4263 9350 4243 9421
4263 9432
$$
ZOGG299
WGUS73 KDMX 200200
FFSDMX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
900 PM CDT FRI AUG 19 2016
IAC079-091-187-197-200445-
/O.CON.KDMX.FF.W.0020.000000T0000Z-160820T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WEBSTER IA-HAMILTON IA-HUMBOLDT IA-WRIGHT IA-
900 PM CDT FRI AUG 19 2016
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1145 PM CDT FOR
NORTHEASTERN WEBSTER...NORTHWESTERN HAMILTON...SOUTHEASTERN HUMBOLDT
AND WRIGHT COUNTIES...
AT 857 PM CDT...DOPPLER RADAR INDICATED HEAVY RAIN ACROSS THE WARNED
AREA. AS MUCH AS 5 TO 6 INCHES OF RAIN HAS FALLEN...WITH THE
GREATEST AMOUNTS FALLING SOUTHEAST OF EAGLE GROVE IN SOUTHWESTERN
WRIGHT COUNTY. IN ADDITION...BETWEEN 4 AND 5 INCHES OF RAIN FELL IN
NORTHEASTERN WEBSTER COUNTY...FROM NORTHEAST OF FORT DODGE TO THE
VINCENT AREA. FLASH FLOODING IS LIKELY UNDERWAY.
SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
FORT DODGE...CLARION...EAGLE GROVE...BELMOND...FORT DODGE REGIONAL
AIRPORT...ELM LAKE...BIG WALL LAKE...GOLDFIELD...BADGER...DOWS...
THOR...VINCENT...WOOLSTOCK...ROWAN...GALT...CLARION MUNICIPAL
AIRPORT...EAGLE GROVE MUNICIPAL AIRPORT AND SPORTSMAN PARK.
LITTLE IF ANY ADDITIONAL RAINFALL IS EXPECTED IN THE WARNED AREA
TONIGHT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.
&&
LAT...LON 4286 9352 4281 9350 4263 9350 4243 9421
4263 9432
$$
ZOGG649
WGUS73 KDMX 200438
FFSDMX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1138 PM CDT FRI AUG 19 2016
IAC079-091-187-197-200446-
/O.EXP.KDMX.FF.W.0020.000000T0000Z-160820T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WEBSTER IA-HAMILTON IA-HUMBOLDT IA-WRIGHT IA-
1138 PM CDT FRI AUG 19 2016
...THE FLASH FLOOD WARNING FOR NORTHEASTERN WEBSTER...NORTHWESTERN
HAMILTON...SOUTHEASTERN HUMBOLDT AND WRIGHT COUNTIES WILL EXPIRE AT
1145 PM CDT...
THE HEAVY RAIN HAS ENDED. FLASH FLOODING IS NO LONGER EXPECTED TO
POSE AN IMMEDIATE THREAT. HOWEVER...LOCAL STREAMS AND RIVERS MAY
REMAIN HIGH THROUGH THE OVERNIGHT HOURS. PLEASE CONTINUE TO HEED ANY
REMAINING ROAD CLOSURES.
LAT...LON 4286 9352 4281 9350 4263 9350 4243 9421
4263 9432
$$
SKOWThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 7:31 PM CDT | Special Weather Statement | DMX | Bremer | 44 min |
| Aug 19, 9:30 AM CDT | Special Weather Statement | DMX | Wright | 45 min |
| Aug 19, 9:59 AM CDT | Special Weather Statement | DMX | Hamilton | 46 min |
| Aug 19, 10:05 AM CDT | Special Weather Statement | DMX | Cerro Gordo | 40 min |
| Aug 19, 10:16 AM CDT | Special Weather Statement | DMX | Wright | 44 min |
| Aug 19, 10:57 AM CDT | Special Weather Statement | DMX | Franklin | 48 min |
| Aug 19, 11:41 AM CDT | Severe Thunderstorm Warning | DMX | Butler, Franklin, Grundy, Hardin | 49 min |
| Aug 19, 12:35 PM CDT | Special Weather Statement | DMX | Grundy | 40 min |
| Aug 19, 1:11 PM CDT | Special Weather Statement | DMX | Black Hawk, Bremer | 49 min |
| Aug 19, 3:08 PM CDT | Special Weather Statement | DMX | Wright | 37 min |
| Aug 19, 3:16 PM CDT | Severe Thunderstorm Warning | DMX | Hancock, Kossuth, Wright | 44 min |
| Aug 19, 4:24 PM CDT | Flash Flood Warning | DMX | Hancock, Kossuth, Winnebago | 6 hr |
| Aug 19, 5:45 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Humboldt, Webster | 19 min |
| Aug 19, 6:10 PM CDT | Special Weather Statement | DMX | Hamilton | 35 min |
| Aug 19, 6:49 PM CDT | Severe Thunderstorm Warning | DMX | Marshall, Story | 41 min |
| Aug 19, 6:59 PM CDT | Special Weather Statement | DMX | Story | 46 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.