Alert archive / Iowa / Flash Flood Warnings in 2016

Flash Flood Warning 17, NWS Sioux Falls, SD

June 17, 20164 counties in Iowa

NWS Sioux Falls, SD issued this flash flood warning at Jun 17, 2016, 11:33 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
Jun 17, 2016, 11:33 PM CDT (04:33 UTC)
Expired
Jun 18, 2016, 5:30 AM CDT
In force
6 hr
Issued by
NWS Sioux Falls, SD
Area
Storm-based polygon
Flood severity
None

Counties Cherokee County, IA, Ida County, IA, Plymouth County, IA, Woodbury County, IA

The radar

The Omaha radar (KOAX), 134 km from the middle of the area, began a volume at 04:35 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

TimeReportWhereRemark
Jun 18, 1:53 AM CDTFLASH FLOOD4 Ese Moville, IASEVERAL SPOTS ALONG 160TH AND OLD HWY 20 WITH WATER RUNNING OVER THE ROADS OR CLOSED DUE TO FLASH FLOODING BETWEEN MOVILLE AND CORRECTIONVILLE. ROADS SLOWLY RE-OPENING.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 4.6 hours before the alert went out and 134 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-pSkew-T log-p diagram, Omaha, NE at 00:00Z on 2016-06-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3543 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Omaha, NE at 00:00Z on 2016-06-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 9 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
3543 J/kg
Mixed-layer CIN
-70 J/kg
Mixed-layer LCL
1690 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
9 m²/s²
0-3 km storm-relative helicity
90 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

231 
WGUS53 KFSD 180433
FFWFSD
IAC035-093-149-193-181030-
/O.NEW.KFSD.FF.W.0017.160618T0433Z-160618T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1133 PM CDT FRI JUN 17 2016

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN IDA COUNTY IN WEST CENTRAL IOWA...
  SOUTHEASTERN PLYMOUTH COUNTY IN NORTHWESTERN IOWA...
  SOUTHWESTERN CHEROKEE COUNTY IN NORTHWESTERN IOWA...
  EASTERN WOODBURY COUNTY IN WEST CENTRAL IOWA...

* UNTIL 530 AM CDT

* AT 1132 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. RADAR INDICATED AS MUCH AS TWO
  TO THREE INCHES OF RAIN HAS FALLEN SINCE 9PM.  FLASH FLOODING IS
  EXPECTED TO BEGIN SHORTLY. ADDITIONAL RAINFALL UP TO ONE INCH MAY
  BE POSSIBLE. 

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  MOVILLE...KINGSLEY...CORRECTIONVILLE...ANTHON...PIERSON...WASHTA...
  CUSHING AND OTO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNED AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY.

&&

LAT...LON 4261 9617 4275 9587 4256 9564 4233 9565
      4221 9587 4221 9590

$$

DUX
2 follow-up statements
635 
WGUS73 KFSD 180554
FFSFSD

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1254 AM CDT SAT JUN 18 2016

IAC035-093-149-193-181030-
/O.CON.KFSD.FF.W.0017.000000T0000Z-160618T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
IDA IA-PLYMOUTH IA-CHEROKEE IA-WOODBURY IA-
1254 AM CDT SAT JUN 18 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 530 AM CDT FOR
NORTHWESTERN IDA...SOUTHEASTERN PLYMOUTH...SOUTHWESTERN CHEROKEE AND
EASTERN WOODBURY COUNTIES...

AT 1253 AM CDT...DOPPLER RADAR INDICATED THAT LIGHT RAIN WILL
CONTINUE OVER THE WARNED AREA THROUGH 2 AM CDT. DOPPLER RADAR
INDICATED UPWARDS OF TWO TO FOUR INCHES OF RAIN HAD FALLEN SINCE 9PM
FRIDAY. FLASH FLOODING IS ONGOING...AND WILL SLOWLY BEGIN TO
RECEDE OVER THE UPCOMING HOURS. 

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
MOVILLE...KINGSLEY...CORRECTIONVILLE...ANTHON...PIERSON...WASHTA...
CUSHING AND OTO.

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.

PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNED AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY.

&&

LAT...LON 4261 9617 4275 9587 4256 9564 4233 9565
      4221 9587 4221 9590

$$

DUX
846 
WGUS73 KFSD 181021
FFSFSD

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
521 AM CDT SAT JUN 18 2016

IAC035-093-149-193-181030-
/O.EXP.KFSD.FF.W.0017.000000T0000Z-160618T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
IDA IA-PLYMOUTH IA-CHEROKEE IA-WOODBURY IA-
521 AM CDT SAT JUN 18 2016

...THE FLASH FLOOD WARNING FOR NORTHWESTERN IDA...SOUTHEASTERN
PLYMOUTH...SOUTHWESTERN CHEROKEE AND EASTERN WOODBURY COUNTIES WILL
EXPIRE AT 530 AM CDT...

HEAVY RAIN HAD ENDED AND FLOOD WATERS ARE RECEDING. FLASH FLOODING
IS NO LONGER EXPECTED TO POSE A THREAT. PLEASE CONTINUE TO HEED ANY
REMAINING ROAD CLOSURES.

LAT...LON 4261 9617 4275 9587 4256 9564 4233 9565
      4221 9587 4221 9590

$$

DUX

The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 17, 8:18 PM CDTSevere Thunderstorm WarningFSDBuena Vista, Cherokee, Clay, Dickinson, Lyon, O'Brien and 2 more42 min
Jun 17, 8:44 PM CDTSevere Thunderstorm WarningFSDPlymouth, Sioux46 min
Jun 17, 9:44 PM CDTSevere Thunderstorm WarningFSDPlymouth, Sioux46 min
Jun 17, 9:53 PM CDTSevere Thunderstorm WarningFSDPlymouth, Woodbury52 min
Jun 17, 10:14 PM CDTSevere Thunderstorm WarningFSDCherokee, Ida, Plymouth, Woodbury46 min
Jun 17, 10:41 PM CDTSevere Thunderstorm WarningFSDWoodbury49 min
Jun 17, 10:57 PM CDTSevere Thunderstorm WarningFSDCherokee, Ida, Plymouth, Woodbury37 min
Jun 18, 3:14 AM CDTHeat AdvisoryFSDLyon, Plymouth, Sioux, Woodbury41 hr
Jun 18, 3:19 AM CDTRiver Flood WarningFSDWoodbury24 hr
Jun 18, 8:15 AM CDTRiver Flood WarningFSDClay, Dickinson62 hr
Jun 18, 9:26 AM CDTRiver Flood WarningFSDMonona, Woodbury29 hr
Jun 18, 9:57 AM CDTRiver Flood WarningFSDClay, Dickinson54 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.