Alert archive / Iowa / Flash Flood Warnings in 2007
Flash Flood Warning 22, NWS La Crosse, WI
NWS La Crosse, WI issued this flash flood warning at Aug 21, 2007, 9:53 PM CDT for Houston County, Minnesota; Allamakee County, Winneshiek County, Iowa. It was in force for 3 hr. 5 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 21, 2007, 9:53 PM CDT (02:53 UTC)
- Expired
- Aug 22, 2007, 12:45 AM CDT
- In force
- 3 hr
- Issued by
- NWS La Crosse, WI
- Area
- Whole counties
Counties Allamakee County, IA, Winneshiek County, IA, Houston County, MN
The radar
The La Crosse radar (KARX), 55 km from the middle of the area, began a volume at 02:56 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 21, 11:30 PM CDT | FLASH FLOOD | 2 N Bluffton, IA | COUNTY W20 OPEN BUT DAMAGED BY WATER. NOT RECOMMEDNED FOR TRAVEL. TIME ESTIMATED. |
| Aug 21, 11:30 PM CDT | FLASH FLOOD | 2 N Ridgeway, IA | COUNTY W14 DAMAGED DUE TO HEAVY RAINFALL. TRAVEL NOT RECOMMENDED. TIME ESTIMATED. |
| Aug 21, 11:30 PM CDT | FLASH FLOOD | 2 Se Bluffton, IA | SCENIC RIVER ROAD DAMAGED BY WATER. TRAVEL NOT RECOMMENDED. TIME ESTIMATED. |
| Aug 22, 12:00 AM CDT | FLASH FLOOD | 5 Nw Waukon, IA | ONEILL RIDGE ROAD CLOSED DUE TO WATER ISSUES. THAT REMAINED CLOSED AT 1030 AM AUG 22. PARTIAL ROAD CLOSURES THROUGH THE REMAINDER OF THE COUNTY DUE TO RAINFALL. TIME ESTIMATED. |
| Aug 22, 12:00 AM CDT | FLASH FLOOD | Caledonia, MN | WATER OVER THE ROAD NEAR GREEN ACRES |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 2.9 hours before the alert went out and 218 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.
- Mixed-layer CAPE
- 4094 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 915 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 114 m²/s²
- 0-3 km storm-relative helicity
- 101 m²/s²
- Significant tornado parameter
- 1.4
- Supercell composite
- 8.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS53 KARX 220254
FFWARX
IAC005-191-MNC055-220545-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
953 PM CDT TUE AUG 21 2007
THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A
* FLASH FLOOD WARNING FOR...
WINNESHIEK COUNTY IN NORTHEAST IOWA
ALLAMAKEE COUNTY IN NORTHEAST IOWA
HOUSTON COUNTY IN SOUTHEAST MINNESOTA
* UNTIL 1245 AM CDT
* AT 950 PM CDT...NATIONAL WEATHER SERVICE RADAR DETECTED
SEVERAL LINES OF THUNDERSTORMS MOVING EAST AT 45 MPH ACROSS
PARTS OF SOUTHEAST MINNESOTA AND NORTHEAST IOWA. THESE
THUNDERSTORMS MAY PRODUCE BETWEEN ONE AND TWO INCHES OF
RAIN BETWEEN 945 PM AND 1245 PM.
* SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...BROWNSVILLE...
CALEDONIA...HOKAH...HOUSTON...LA CRESCENT...SPRING GROVE AND
CALMAR. THIS WILL ALSO AFFECT THE ROOT...UPPER IOWA...YELLOW...
AND COON RIVERS AND THEIR TRIBUTARIES.
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 4353 9126 4337 9122 4331 9107 4310 9118
4308 9210 4349 9209 4350 9171 4384 9172
4385 9129
$$
BOYNE3 follow-up statements
000
WGUS73 KARX 220356
FFSARX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1055 PM CDT TUE AUG 21 2007
IAC005-191-MNC055-220545-
WINNESHIEK IA-ALLAMAKEE IA-HOUSTON MN-
1055 PM CDT TUE AUG 21 2007
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1245 AM CDT FOR
HOUSTON...ALLAMAKEE AND WINNESHIEK COUNTIES...
AT 1055 PM CDT...AN AREA OF THUNDERSTORMS WITH VERY HEAVY RAIN WERE
MOVING EAST AT 40 MPH ACROSS HOUSTON COUNTY IN SOUTHEAST
MINNESOTA...AND WINNESHIEK AND ALLAMAKEE COUNTIES IN NORTHEAST
IOWA. DOPPLER RADAR CURRENTLY INDICATES THAT BETWEEN ONE TWO INCHES
OF RAIN HAS FALLEN IN THE BURR OAK...KENDALLVILLE...AND RIDGEWAY
AREAS IN NORTHWEST WINNESHIEK COUNTY. BESIDES THESE COMMUNITIES...
RESIDENTS ALONG THE UPPER IOWA RIVER TRIBUTARIES SHOULD BE ON THE
LOOKOUT FOR RAPID RISES.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IMMINENT.
IF YOU ARE IN THE WARNED AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO FORGE
FLOODED ROADWAYS BY FOOT OR AUTOMOBILE. REMEMBER...TURN AROUND DONT
DROWN.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS. IF FLOODING IS OBSERVED ACT QUICKLY. MOVE TO
HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO
FLOODING WHEN WATER BEGINS RISING.
MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT DRIVE YOUR VEHICLE
INTO AREAS WHERE THE WATER COVERS THE ROAD. TWO FEET OF RUSHING WATER
CAN CARRY AWAY MOST VEHICLES INCLUDING SPORT UTILITY VEHICLES AND
PICKUPS. REMEMBER...TURN AROUND DONT DROWN.
LAT...LON 4353 9126 4337 9122 4331 9107 4310 9118
4308 9210 4349 9209 4350 9171 4384 9172
4385 9129
$$000
WGUS73 KARX 220457
FFSARX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1154 PM CDT TUE AUG 21 2007
IAC005-191-MNC055-220545-
WINNESHIEK IA-ALLAMAKEE IA-HOUSTON MN-
1153 PM CDT TUE AUG 21 2007
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1245 AM CDT FOR
HOUSTON...ALLAMAKEE AND WINNESHIEK COUNTIES...
AT 1153 PM CDT...DOPPLER RADAR CONTINUED TO SHOW THUNDERSTORMS
PRODUCING VERY HEAVY RAIN BETWEEN HOUSTON MINNESOTA AND WAUKON IOWA.
THESE THUNDERSTORMS PRODUCED BETWEEN ONE AND TWO AND A HALF INCHES OF
RAIN NORTH OF A CRESCO TO SATTRE LINE IN NORTHERN WINNESHIEK COUNTY
BETWEEN 1045 AND 1145 PM. A SPOTTER IN SPRING GROVE MINNESOTA
REPORTED 2.10 INCHES OF RAIN FROM THESE THUNDERSTORMS.
RESIDENTS IN CALEDONIA AND SPRING GROVE IN SOUTHEAST
MINNESOTA...AND DORCHESTER...HANOVER...AND NEW ALBIN IN NORTHEAST
IOWA SHOULD BE ALERT FOR STREET FLOODING. IN ADDITION...THERE
MAY BE SOME RAPID RISES ALONG COON AND WINNEBAGO CREEKS IN SOUTHERN
HOUSTON COUNTY...AND ALONG THE UPPER IOWA RIVER AND THEIR
TRIBUTARIES IN NORTHERN ALLAMAKEE COUNTY. IF FLOODING IS OBSERVED...
SEEK HIGH GROUND. IN ADDITION...THERE MAY BE SOME MUD SLIDES.
EXCESSIVE RUNOFF FROM THESE STORMS WILL CAUSE FLOODING OF CREEKS AND
STREAMS...ROADS AND ROADSIDE CULVERTS. THE HEAVY RAINS COULD ALSO
TRIGGER ROCK AND MUD-SLIDES IN STEEP TERRAIN. PERSONS IN THE WARNED
AREA SHOULD BE PREPARED TO ACT QUICKLY TO AVOID THESE HAZARDS.
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.
LAT...LON 4353 9126 4337 9122 4331 9107 4310 9118
4308 9210 4349 9209 4350 9171 4384 9172
4385 9129
$$
BOYNE000
WGUS73 KARX 220544
FFSARX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
1243 AM CDT WED AUG 22 2007
IAC005-191-MNC055-220553-
WINNESHIEK IA-ALLAMAKEE IA-HOUSTON MN-
1243 AM CDT WED AUG 22 2007
...THE FLASH FLOOD WARNING WILL EXPIRE AT 1245 AM CDT FOR HOUSTON...
ALLAMAKEE AND WINNESHIEK COUNTIES...
THE THREAT FOR FLASH FLOODING HAS DIMINISHED ACROSS THE WARNED AREA.
THEREFORE...THE FLASH FLOOD WARNING HAS BEEN ALLOWED TO EXPIRE.
HOWEVER A FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 10 AM WEDNESDAY
MORNING.
PLEASE REPORT ANY FLOODING TO YOUR LOCAL LAW ENFORCEMENT OFFICE AND
TELL THEM TO RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE.
LAT...LON 4353 9126 4337 9122 4331 9107 4310 9118
4308 9210 4349 9209 4350 9171 4384 9172
4385 9129
$$
BOYNEThe office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 8:43 PM CDT | Severe Thunderstorm Warning | ARX | Mower | 47 min |
| Aug 21, 9:14 PM CDT | Flash Flood Warning | ARX | Fillmore, Mower | 3 hr |
| Aug 22, 4:18 AM CDT | Flash Flood Watch | ARX | Dodge, Fillmore, Houston, Mower, Olmsted, Wabasha and 1 more | 35 hr |
| Aug 21, 9:50 PM CDT | Severe Thunderstorm Warning | ARX | Floyd | 40 min |
| Aug 21, 10:15 PM CDT | Severe Thunderstorm Warning | ARX | Chickasaw | 45 min |
| Aug 21, 11:09 PM CDT | Severe Thunderstorm Warning | ARX | Allamakee | 51 min |
| Aug 21, 11:22 PM CDT | Severe Thunderstorm Warning | ARX | Winneshiek | 23 min |
| Aug 22, 4:44 AM CDT | River Flood Warning | ARX | Allamakee | 35 hr |
| Aug 22, 3:17 PM CDT | Severe Thunderstorm Warning | ARX | Fayette | 58 min |
Nearby
Flash Flood Warnings in Iowa, 2007Flash Flood Warnings in Minnesota, 2007Every 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.