Flash Flood Warning 6, NWS Sioux Falls, SD

Issued

May 8, 2005, 8:21 PM CDT (01:21 UTC)

Expired

May 8, 2005, 11:15 PM CDT

In force

3 hr

Issued by

NWS Sioux Falls, SD

Area

Counties, with a storm outline in the text

County Plymouth County, IA

The Sioux Falls radar (KFSD), 108 km from the middle of the area, began a volume at 01:24 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.

000 
WGUS53 KFSD 090125
FFWFSD
IAC149-090415-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
821 PM CDT SUN MAY 8 2005

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  PLYMOUTH COUNTY IN NORTHWEST IOWA

* UNTIL 1115 PM CDT

* AT 821 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  FLASH FLOODING FROM A LINE OF THUNDERSTORMS NEAR HINTON...OR ABOUT 
  10 MILES NORTHEAST OF SIOUX CITY.  THE LINE OF STORMS ARE MOVING 
  TO THE EAST AT 10 MPH.

  RADAR ESTIMATES SHOW 2 TO 3 INCHES OF RAIN HAVE FALLEN ALONG 
  HIGHWAY 75 IN PLYMOUTH COUNTY SINCE 6 PM CDT.  ANOTHER INCH OR 
  RAIN IS POSSIBLE ALONG AND EAST OF HIGHWAY 75 THROUGH 930 PM CDT. 
  THIS AMOUNT OF RAINFALL IS EXPECTED TO CAUSE STREET FLOODING IN LE 
  MARS AS WELL AS FLOODING OF LOW LYING AREAS IN THE VICINITY OF THE 
  FLOYD RIVER.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

LAT...LON 4257 9639 4257 9607 4291 9584 4290 9617

$$
04/SCHUMACHER

000 
WGUS73 KFSD 090202
FFSFSD

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
902 PM CDT SUN MAY 8 2005

IAC149-090415-
PLYMOUTH IA-
902 PM CDT SUN MAY 8 2005

...A FLASH FLOOD WARNING CONTINUES UNTIL 1115 PM CDT FOR PLYMOUTH
COUNTY...

AT 834 PM CDT...TRAINED WEATHER SPOTTERS REPORTED STREET FLOODING IN 
PARKING LOTS NEAR HIGHWAY 75 ON THE SOUTH SIDE OF LE MARS. 

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.

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.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

LAT...LON 4257 9639 4257 9607 4291 9584 4290 9617

$$
04

000 
WGUS73 KFSD 090332
FFSFSD

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1032 PM CDT SUN MAY 8 2005

IAC149-090338-
PLYMOUTH IA-
1032 PM CDT SUN MAY 8 2005

...THE FLASH FLOOD WARNING FOR PLYMOUTH COUNTY IS CANCELLED...

AT 845 PM CDT...LAW ENFORCEMENT REPORTED WATER FROM A SMALL CREEK 
HAD FLOODED THE INTERSECTION OF COUNTY ROADS C44 AND K49...ABOUT 
4 MILES SOUTH OF LE MARS. THE WATER HAS SINCE RECEDED...AND 
ADDITIONAL HEAVY RAINFALL IS NOT EXPECTED IN PLYMOUTH COUNTY 
TONIGHT. THEREFORE...THE FLASH FLOOD WARNING HAS BEEN CANCELLED.

LAT...LON 4257 9639 4257 9607 4291 9584 4290 9617

$$
 JH

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

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.