Alert archive / Iowa / Flash Flood Warnings in 2016

Flash Flood Warning 5, NWS Des Moines, IA

June 10, 2016Cerro Gordo County, Winnebago County, Worth County, Iowa

NWS Des Moines, IA issued this flash flood warning at Jun 10, 2016, 10:33 PM CDT for Cerro Gordo County, Winnebago 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: Jun 10, 2016, 10:33 PM CDT (03:33 UTC)
Expired: Jun 11, 2016, 4:30 AM CDT
In force: 6 hr
Issued by: NWS Des Moines, IA
Area: Storm-based polygon
Flood severity: None

Counties Cerro Gordo County, IA, Winnebago County, IA, Worth County, IA

The radar

The Minneapolis radar (KMPX), 172 km from the middle of the area, began a volume at 03:35 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 11, 12:00 AM CDT	FLASH FLOOD	3 Nne Mason City, IA	ROAD WASHOUT AND SINK HOLE ON B20 NEAR POPLAR AND RAVEN RD. FROM KIMT TV NEWS REPORT.. DELAYED REPORT.

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, 3.6 hours before the alert went out and 172 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1514 J/kg
Mixed-layer CIN: -175 J/kg
Mixed-layer LCL: 1352 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 68 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted.

903 
WGUS53 KDMX 110333
FFWDMX
IAC033-189-195-110930-
/O.NEW.KDMX.FF.W.0005.160611T0333Z-160611T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1033 PM CDT FRI JUN 10 2016

THE NATIONAL WEATHER SERVICE IN DES MOINES  HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN WINNEBAGO COUNTY IN NORTH CENTRAL IOWA...
  WORTH COUNTY IN NORTH CENTRAL IOWA...
  NORTHERN CERRO GORDO COUNTY IN NORTH CENTRAL IOWA...

* UNTIL 430 AM CDT

* AT 1031 PM CDT...DOPPLER RADAR AND AUTOMATED RAIN GAUGES 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.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  MASON CITY...NORTHWOOD...LAKE MILLS...NORA SPRINGS...MANLY...
  RICE LAKE...PLYMOUTH...FERTILE...KENSETT...GRAFTON...HANLONTOWN...
  JOICE...ROCK FALLS...PORTLAND...BOLAN...
  LAKE MILLS MUNICIPAL AIRPORT...RICE LAKE STATE PARK...
  HOGSBACK WILDLIFE AREA AND NORTHWOOD MUNICIPAL.

  SOME STREAM AFFECTED INCLUDE WHARAM CREEK AND WILLOW CREEK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

&&

LAT...LON 4346 9322 4333 9303 4310 9302 4322 9349
      4323 9350 4326 9350 4326 9353 4347 9374

$$

SMALL

2 follow-up statements

005 
WGUS73 KDMX 110508
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1208 AM CDT SAT JUN 11 2016

IAC033-189-195-110930-
/O.CON.KDMX.FF.W.0005.000000T0000Z-160611T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WINNEBAGO IA-WORTH IA-CERRO GORDO IA-
1208 AM CDT SAT JUN 11 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 AM CDT FOR
EASTERN WINNEBAGO...WORTH AND NORTHERN CERRO GORDO COUNTIES...

AT 1200 AM CDT...DOPPLER RADAR INDICATED THAT THE THUNDERSTORMS THAT
PRODUCED HEAVY RAIN ACROSS THE WARNED AREA HAVE DIMINISHED AND MOVED
OFF TO THE SOUTHEAST. HOWEVER RADAR ESTIMATES SHOW WIDESPREAD
RAINFALL AMOUNTS OF 5 INCHES OR MORE FROM EASTERN WINNEBAGO COUNTY
INTO WESTERN AND SOUTHERN WORTH COUNTY INCLUDING NEAR JOICE AND
HANLONTOWN.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
NORTHWOOD...LAKE MILLS...NORA SPRINGS...MANLY...RICE LAKE...
PLYMOUTH...FERTILE...KENSETT...GRAFTON...HANLONTOWN...JOICE...
ROCK FALLS...PORTLAND...BOLAN...LAKE MILLS MUNICIPAL AIRPORT...
RICE LAKE STATE PARK AND HOGSBACK WILDLIFE AREA.

CREEKS AND STREAMS PARTICULARLY IMPACTED MAY INCLUDE WHARAM
CREEK...WILLOW CREEK AND SPRING CREEK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

FLOODING IS OCCURRING OR IS IMMINENT. IT IS IMPORTANT TO KNOW WHERE
YOU ARE RELATIVE TO STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME
KILLERS IN HEAVY RAINS. CAMPERS AND HIKERS SHOULD AVOID STREAMS OR
CREEKS.

&&

LAT...LON 4346 9322 4333 9303 4310 9302 4322 9349
      4323 9350 4326 9350 4326 9353 4347 9374

$$

SMALL

591 
WGUS73 KDMX 110641
FFSDMX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
141 AM CDT SAT JUN 11 2016

IAC033-189-195-110648-
/O.CAN.KDMX.FF.W.0005.000000T0000Z-160611T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WINNEBAGO IA-WORTH IA-CERRO GORDO IA-
141 AM CDT SAT JUN 11 2016

...THE FLASH FLOOD WARNING FOR EASTERN WINNEBAGO...WORTH AND NORTHERN
CERRO GORDO COUNTIES IS CANCELLED...

THE HEAVY RAIN HAS ENDED AND FLOODING IS NO LONGER EXPECTED TO POSE
A THREAT.  AT 137AM...THE WORTH COUNTY SHERIFF NOTED NO REPORTS OF
FLOODING, EVEN IN THE HARDEST HIT LOCATIONS NEAR JOICE AND
HANLONTOWN WHERE RADAR ESTIMATES SHOW THAT FOUR OR MORE INCHES OF
RAIN MAY HAVE FALLEN FRIDAY EVENING.

LAT...LON 4346 9322 4333 9303 4310 9302 4322 9349
      4323 9350 4326 9350 4326 9353 4347 9374

$$

SMALL

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 10, 7:50 PM CDT	Special Weather Statement	DMX	Franklin	55 min
Jun 10, 8:46 PM CDT	Special Weather Statement	DMX	Palo Alto	44 min
Jun 10, 8:50 PM CDT	Special Weather Statement	DMX	Winnebago, Worth	55 min
Jun 10, 9:23 PM CDT	Special Weather Statement	DMX	Kossuth	37 min
Jun 10, 9:53 PM CDT	Special Weather Statement	DMX	Hancock	52 min
Jun 10, 10:18 PM CDT	Special Weather Statement	DMX	Cerro Gordo, Winnebago, Worth	42 min
Jun 10, 10:43 PM CDT	Special Weather Statement	DMX	Wright	47 min
Jun 11, 12:25 AM CDT	Special Weather Statement	DMX	Black Hawk, Grundy, Hardin, Tama	65 min
Jun 11, 1:09 AM CDT	Special Weather Statement	DMX	Poweshiek, Tama	51 min
Jun 11, 2:28 AM CDT	Special Weather Statement	DMX	Bremer	47 min
Jun 11, 2:47 AM CDT	Severe Thunderstorm Warning	DMX	Bremer, Butler	43 min
Jun 11, 3:31 AM CDT	Special Weather Statement	DMX	Black Hawk	59 min
Jun 11, 4:37 AM CDT	Special Weather Statement	DMX	Jasper, Polk, Poweshiek	53 min
Jun 11, 8:26 AM CDT	Special Weather Statement	DMX	Wayne	64 min
Jun 11, 9:08 AM CDT	Special Weather Statement	DMX	Warren	52 min
Jun 11, 10:37 AM CDT	Special Weather Statement	DMX	Clarke	53 min
Jun 11, 4:09 PM CDT	Severe Thunderstorm Warning	DMX	Humboldt, Kossuth, Palo Alto, Pocahontas	51 min

Nearby

Flash Flood Warnings in Iowa, 2016 Every 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.