Alert archive / Iowa / Flash Flood Warnings in 2016
Flash Flood Warning 29, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Sep 21, 2016, 6:33 PM CDT for Cerro Gordo County, Worth County, 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
- Sep 21, 2016, 6:33 PM CDT (23:33 UTC)
- Expired
- Sep 22, 2016, 12:30 AM CDT
- In force
- 6 hr
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Cerro Gordo County, IA, Worth County, IA
The radar
The La Crosse radar (KARX), 167 km from the middle of the area, began a volume at 23:32 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 21, 8:15 PM CDT | FLASH FLOOD | 1 Ene Mason City, IA | CERRO GORDO COUNTY DISPATCH NOTED THAT EAST PARK HAS BEEN FULLY CLOSED DUE TO FLOODING. |
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, 11.6 hours before the alert went out and 179 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
- 515 J/kg
- Mixed-layer CIN
- -331 J/kg
- Mixed-layer LCL
- 738 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 8.5
The text
As transmitted.
033
WGUS53 KDMX 212333
FFWDMX
IAC033-195-220530-
/O.NEW.KDMX.FF.W.0029.160921T2333Z-160922T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
633 PM CDT WED SEP 21 2016
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHEASTERN WORTH COUNTY IN NORTH CENTRAL IOWA...
NORTHEASTERN CERRO GORDO COUNTY IN NORTH CENTRAL IOWA...
* UNTIL 1230 AM CDT.
* AT 632 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
HEAVY RAIN ACROSS THE WARNED AREA. UP TO TWO INCHES OF RAIN HAVE
ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
MASON CITY...MANLY...MASON CITY MUNICIPAL AIRPORT...PLYMOUTH...
GRAFTON...ROCK FALLS...BURCHINAL...PORTLAND AND BOLAN.
THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 198 AND 200.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.
&&
LAT...LON 4341 9302 4319 9303 4303 9328 4322 9336
4341 9303
$$
SKOW2 follow-up statements
919
WGUS73 KDMX 220041
FFSDMX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
741 PM CDT WED SEP 21 2016
IAC033-195-220530-
/O.CON.KDMX.FF.W.0029.000000T0000Z-160922T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WORTH IA-CERRO GORDO IA-
741 PM CDT WED SEP 21 2016
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1230 AM CDT FOR
SOUTHEASTERN WORTH AND NORTHEASTERN CERRO GORDO COUNTIES...
AT 741 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING HEAVY
RAIN ACROSS THE WARNED AREA. UP TO THREE INCHES OF RAIN HAVE ALREADY
FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY IF IT HAS NOT
ALREADY.
SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
MASON CITY...MANLY...MASON CITY MUNICIPAL AIRPORT...PLYMOUTH...
GRAFTON...ROCK FALLS...BURCHINAL...PORTLAND AND BOLAN.
THIS INCLUDES INTERSTATE 35 BETWEEN MILE MARKERS 198 AND 200.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.
&&
LAT...LON 4341 9302 4319 9303 4303 9328 4322 9336
4341 9303
$$
SKOW414
WGUS73 KDMX 220530
FFSDMX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1230 AM CDT THU SEP 22 2016
IAC033-195-220538-
/O.EXP.KDMX.FF.W.0029.000000T0000Z-160922T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WORTH IA-CERRO GORDO IA-
1230 AM CDT THU SEP 22 2016
...THE FLASH FLOOD WARNING FOR SOUTHEASTERN WORTH AND NORTHEASTERN
CERRO GORDO COUNTIES WILL EXPIRE AT 1230 AM CDT...
WIDESPREAD FLASH FLOODING IS NO LONGER ANTICIPATED...BUT WITH
ADDITIONAL HEAVY RAINFALL FORECAST FOR TONIGHT...AN AREAL FLOOD
WARNING HAS BEEN ISSUED FOR THIS AREA.
LAT...LON 4341 9302 4319 9303 4303 9328 4322 9336
4341 9303
$$
SKOWThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 21, 3:26 PM CDT | Special Weather Statement | DMX | Cerro Gordo | 49 min |
| Sep 21, 3:32 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo | 43 min |
| Sep 21, 4:23 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo | 37 min |
| Sep 21, 4:50 PM CDT | Flash Flood Warning | DMX | Cerro Gordo | 6 hr |
| Sep 21, 4:57 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo | 31 min |
| Sep 21, 5:13 PM CDT | Severe Thunderstorm Warning | DMX | Butler, Franklin | 47 min |
| Sep 21, 5:19 PM CDT | Tornado Warning | DMX | Butler | 56 min |
| Sep 21, 5:45 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Worth | 45 min |
| Sep 21, 6:17 PM CDT | Tornado Warning | DMX | Butler | 43 min |
| Sep 21, 6:44 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo | 46 min |
| Sep 21, 6:58 PM CDT | Flash Flood Warning | DMX | Butler | 12 hr |
| Sep 21, 6:59 PM CDT | Tornado Warning | DMX | Bremer, Butler | 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.