Alert archive / Iowa / Flash Flood Warnings in 2005

Flash Flood Warning 16, NWS Sioux Falls, SD

June 13, 2005Lyon County, Sioux County, Iowa; Nobles County, Minnesota

NWS Sioux Falls, SD issued this flash flood warning at Jun 13, 2005, 7:50 PM CDT for Lyon County, Sioux County, Iowa; Nobles County, Minnesota. It was in force for 4 hr. 3 reports 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 13, 2005, 7:50 PM CDT (00:50 UTC)
Expired: Jun 13, 2005, 11:45 PM CDT
In force: 4 hr
Issued by: NWS Sioux Falls, SD
Area: Counties, with a storm outline in the text

Counties Lyon County, IA, Sioux County, IA, Nobles County, MN

The radar

The Sioux Falls radar (KFSD), 40 km from the middle of the area, began a volume at 00:50 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
Jun 13, 8:00 PM CDT	FLASH FLOOD	2 Wsw Inwood, IA	WATER RUNNING OVER BUCHANAN AVE BETWEEN 240TH AND 250TH ST. RECEDED BY 930 PM.
Jun 13, 8:55 PM CDT	FLASH FLOOD	1 N Fairview, IA	WATER OVER COUNTY GRAVEL ROADS...SEVERAL CREEKS WELL OUT OF BANKS AND STILL RISING. RECEIVED OVER 4 INCHES OF RAINFALL.
Jun 13, 10:00 PM CDT	FLASH FLOOD	Ellsworth, MN	WATER COLLECTING IN LOW LYING AREAS.

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, 0.8 hours before the alert went out and 231 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: 77 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 862 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 80 m²/s²
0-3 km storm-relative helicity: 112 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS53 KFSD 140050
FFWFSD
IAC119-167-MNC105-140445-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
750 PM CDT MON JUN 13 2005

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  LYON COUNTY IN NORTHWEST IOWA
  EXTREME NORTHWESTERN SIOUX COUNTY IN NORTHWEST IOWA
  SOUTHWESTERN NOBLES COUNTY IN SOUTHWEST MINNESOTA

* UNTIL 1145 PM CDT

* AT 749 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS PRODUCING TORRENTIAL RAINFALL FROM NEAR ELLSWORTH
  MINNESOTA...SOUTHWEST TO AROUND BERESFORD. THESE STORMS WILL
  CONTINUE TO TRACK OVER THE SAME AREAS THROUGH 9 PM...AND WILL
  ADD ADDITIONAL RAINFALL OF AN INCH OR TWO...WITH SOME TOTALS
  IN SOUTHWESTERN LYON AND NORTHWESTERN SIOUX COUNTIES EXPECTED
  TO REACH 3 TO 5 INCHES.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

LAT...LON 4325 9660 4321 9646 4353 9582 4361 9606
      4350 9606 4350 9629 4335 9651

$$

CHAPMAN

2 follow-up statements

000 
WGUS73 KFSD 140324
FFSFSD

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1024 PM CDT MON JUN 13 2005

IAC119-167-MNC105-140445-
LYON IA-SIOUX IA-NOBLES MN-
1024 PM CDT MON JUN 13 2005

...A FLASH FLOOD WARNING CONTINUES UNTIL 1145 PM CDT FOR 
SOUTHWESTERN NOBLES...EXTREME NORTHWESTERN SIOUX...AND LYON 
COUNTIES...

BETWEEN 700 PM AND AT 957 PM CDT...TRAINED WEATHER SPOTTERS REPORTED
OVER 4 INCHES OF RAIN 1 MILE NORTHWEST OF FAIRVIEW IN EXTREME 
NORTHWEST SIOUX COUNTY...WITH 2.54 INCHES OF RAIN 2 MILES WEST 
SOUTHWEST OF INWOOD.  HEAVY RAINFALL OF OVER 2 INCHES WAS ALSO 
REPORTED NEAR ELLSWORTH.  RUNOFF FROM THE AREAS OF HEAVY RAINFALL 
RESULTED IN A NUMBER OF COUNTY ROADS UNDER WATER IN SOUTHWESTERN 
LYON COUNTY SOUTHWEST OF INWOOD...INTO NORTHWESTERN PORTIONS OF 
SIOUX COUNTY. LAW ENFORCEMENT ALSO REPORTED PONDING OF WATER IN LOW 
LYING AREAS NEAR ELLSWORTH.  ALSO...AREAS WEST OF ELLSWORTH AROUND 
NORWEIGAN CREEK WILL LIKELY EXPERIENCE SOME FLOODING LATE THIS 
EVENING.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE 
BANKS OF CREEKS AND STREAMS.  BE ESPECIALLY CAUTIOUS AT NIGHT WHEN 
IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLASH FLOODING 
IS OBSERVED ACT QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD 
WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS 
RISING.

LAT...LON 4325 9660 4321 9646 4353 9582 4361 9606
      4350 9606 4350 9629 4335 9651

$$

CHAPMAN

000 
WGUS73 KFSD 140442
FFSFSD

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1141 PM CDT MON JUN 13 2005

IAC119-167-MNC105-140451-
LYON IA-SIOUX IA-NOBLES MN-
1141 PM CDT MON JUN 13 2005

...THE FLASH FLOOD WARNING FOR SOUTHWEST NOBLES...EXTREME NORTHWEST 
SIOUX AND LYON COUNTIES IS CANCELLED...

ADDITIONAL HEAVY RAIN IS NOT EXPECTED TONIGHT. PLEASE CONTINUE TO 
USE CAUTION WHILE TRAVELING IN THIS AREA. ADDITIONAL SHOWERS WILL 
MOVE THROUGH THE REGION LATE TONIGHT INTO TOMORROW...BUT ARE NOT 
EXPECTED TO BE HEAVY.  

LAT...LON 4325 9660 4321 9646 4353 9582 4361 9606
      4350 9606 4350 9629 4335 9651

$$

08

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 13, 7:52 PM CDT	Severe Thunderstorm Warning	FSD	Nobles	39 min
Jun 13, 8:24 PM CDT	Severe Thunderstorm Warning	FSD	Rock	26 min

Nearby

Flash Flood Warnings in Iowa, 2005 Flash Flood Warnings in Minnesota, 2005 Every flash flood warning in 2005

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.