Alert archive / Iowa / Flash Flood Warnings in 2007

Flash Flood Warning 19, NWS La Crosse, WI

August 19, 2007Chickasaw County, Howard County, Iowa

NWS La Crosse, WI issued this flash flood warning at Aug 19, 2007, 5:35 PM CDT for Chickasaw County, Howard County, Iowa. It was in force for 3 hr. 3 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Aug 19, 2007, 5:35 PM CDT (22:35 UTC)
Expired: Aug 19, 2007, 8:30 PM CDT
In force: 3 hr
Issued by: NWS La Crosse, WI
Area: Whole counties

Counties Chickasaw County, IA, Howard County, IA

The radar

The La Crosse radar (KARX), 114 km from the middle of the area, began a volume at 22:35 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
Aug 19, 7:26 PM CDT	FLASH FLOOD	Jerico, IA	CRANE CREEK IS OUT OF ITS BANKS AND FLOODING COUNTY ROAD B22
Aug 19, 8:08 PM CDT	FLASH FLOOD	Elma, IA	MINOR FLOODING WAS REPORTED
Aug 19, 8:08 PM CDT	FLASH FLOOD	Protivin, IA	BOHEMIAN CREEK HAS WENT OUT OF ITS BANKS AND SAND BAGGING IS CURRENTLY TAKING PLACE IN PROTIVIN

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, 10.6 hours before the alert went out and 209 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 510 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 73 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KARX 192235
FFWARX
IAC037-089-200130-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
535 PM CDT SUN AUG 19 2007

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  HOWARD COUNTY IN NORTHEAST IOWA
  CHICKASAW COUNTY IN NORTHEAST IOWA

* UNTIL 830 PM CDT

* AT 535 PM CDT...NATIONAL WEATHER SERVICE RADAR DETECTED 
  THUNDERSTORMS PRODUCING VERY HEAVY RAIN ACROSS HOWARD AND
  CHICKASAW COUNTIES.  ESTIMATES FROM RADAR INDICATE THAT 
  BETWEEN AN INCH AND AN INCH AND A HALF OF RAIN HAS FALLEN 
  DURING THE PAST HOUR.

* SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...CRESCO...ELMA...
  FREDERICKSBURG...IONIA...LAWLER...LIME SPRINGS AND NASHUA.
  RESIDENTS ALONG WAPSIPINICON...LITTLE TURKEY...AND CEDAR
  RIVERS SHOULD WATCH OUT FOR POSSIBLE FLOODING.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IMMINENT.
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. DO NOT ATTEMPT TO FORGE
FLOODED ROADWAYS BY FOOT OR AUTOMOBILE. REMEMBER...TURN AROUND DONT
DROWN.

LAT...LON 4349 9209 4292 9209 4291 9255 4350 9255

$$

BOYNE

1 follow-up statement

000 
WGUS73 KARX 200026
FFSARX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
726 PM CDT SUN AUG 19 2007

IAC037-089-200130-
HOWARD IA-CHICKASAW IA-
726 PM CDT SUN AUG 19 2007

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR
CHICKASAW AND HOWARD COUNTIES...

AT 726 PM CDT...CHICKASAW COUNTY LAW ENFORCEMENT REPORTED THAT 
CRANE CREEK WAS OUT OF ITS BANKS ONTO COUNTY ROAD B 22. DOPPLER 
RADAR INDICATES BETWEEN ONE AND FOUR INCHES OF RAIN HAS FALLEN 
BETWEEN CHARLES CITY AND JERICO...AND BETWEEN ONE AND TWO INCHES
OF RAIN HAS FALLEN BETWEEN NEW HAVEN AND ELMA. 

IN ADDITION...RESIDENTS ALONG THE CEDAR AND WAPSIPINICON RIVERS AND 
THEIR TRIBUTARIES...AND ALONG CRANE CREEK SHOULD MONITOR WATER 
LEVELS FOR RAPID RISES.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IMMINENT. 
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. DO NOT ATTEMPT TO FORGE 
FLOODED ROADWAYS BY FOOT OR AUTOMOBILE. REMEMBER...TURN AROUND DONT 
DROWN.

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

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT DRIVE YOUR VEHICLE
INTO AREAS WHERE THE WATER COVERS THE ROAD. TWO FEET OF RUSHING WATER
CAN CARRY AWAY MOST VEHICLES INCLUDING SPORT UTILITY VEHICLES AND
PICKUPS. REMEMBER...TURN AROUND DONT DROWN.

LAT...LON 4349 9209 4292 9209 4291 9255 4350 9255

$$

BOYNE

The office that day

Everything else NWS La Crosse, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 19, 7:16 AM CDT	Flash Flood Warning	ARX	Winneshiek	3 hr
Aug 19, 10:16 AM CDT	River Flood Warning	ARX	Floyd, Mitchell	18 hr
Aug 19, 5:08 PM CDT	Flash Flood Warning	ARX	Floyd, Mitchell	3 hr

Nearby

Flash Flood Warnings in Iowa, 2007 Every flash flood warning in 2007

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.