Alert archive / Minnesota / Flash Flood Warnings in 2007

Flash Flood Warning 13, NWS La Crosse, WI

August 19, 2007Olmsted County, Wabasha County, Winona County, Minnesota

NWS La Crosse, WI issued this flash flood warning at Aug 19, 2007, 12:56 AM CDT for Olmsted County, Wabasha County, Winona County, Minnesota. It was in force for 6 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 19, 2007, 12:56 AM CDT (05:56 UTC)
Expired
Aug 19, 2007, 7:00 AM CDT
In force
6 hr
Issued by
NWS La Crosse, WI
Area
Whole counties

Counties Olmsted County, MN, Wabasha County, MN, Winona County, MN

The radar

The La Crosse radar (KARX), 81 km from the middle of the area, began a volume at 05:56 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

TimeReportWhereRemark
Aug 19, 1:00 AM CDTFLASH FLOODEyota, MNRESIDENTS OF THE EYOTA TRAILER PARK ARE BEING EVACUATED.
Aug 19, 3:00 AM CDTFLASH FLOODWinona, MN*** 5 FATAL *** 3 REPORTED FATALITIES IN WITOKA...AND 2 IN STOCKTON. TIME UNDETERMINED AT THIS MOMENT.
Aug 19, 3:25 AM CDTFLASH FLOOD2 Wsw Elgin, MNCOUNTY 2 CLOSED NEAR THE OLMSTED COUNTY LINE.
Aug 19, 3:25 AM CDTFLASH FLOODZumbro Falls, MNWATER OVER THE ROAD AT HIGHWAYS 60 AND 63.
Aug 19, 3:49 AM CDTFLASH FLOOD3 Wnw Elgin, MNCOUNTY 25 CLOSED NEAR THE OLMSTED COUNTY LINE.

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 00:00Z, 5.9 hours before the alert went out and 143 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, Minneapolis, MN at 00:00Z on 2007-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2007-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 232 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
541 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
232 m²/s²
0-3 km storm-relative helicity
510 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KARX 190558
FFWARX
MNC039-045-055-109-157-169-191200-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
1256 AM CDT SUN AUG 19 2007

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WABASHA COUNTY IN SOUTHEAST MINNESOTA
  DODGE COUNTY IN SOUTHEAST MINNESOTA
  OLMSTED COUNTY IN SOUTHEAST MINNESOTA
  WINONA COUNTY IN SOUTHEAST MINNESOTA
  HOUSTON COUNTY IN SOUTHEAST MINNESOTA
  FILLMORE COUNTY IN SOUTHEAST MINNESOTA

* UNTIL 700 AM CDT

* AT 1256 AM CDT...NATIONAL WEATHER SERVICE RADAR DETECTED
  THUNDERSTORMS PRODUCING VERY HEAVY RAIN ACROSS MUCH OF THE 
  WARNED AREA.  ESTIMATES FROM RADAR INDICATED THAT 3 TO 10 INCHES 
  OF RAIN HAS FALLEN SINCE LATE SATURDAY AFTERNOON OVER THE WARNED 
  AREA.

* SOME LOCATIONS THAT MAY BE AFFECTED INCLUDE...ALTURA...
  BROWNSVILLE...BYRON...CALEDONIA...CANTON...CHATFIELD AND CLAREMONT.

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.

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 4436 9198 4417 9185 4391 9132 4350 9126
      4351 9243 4383 9245 4386 9306 4420 9306
      4419 9255 4437 9256 4437 9243 4445 9243
      4445 9225

$$

 04

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 18, 7:36 PM CDTFlash Flood WarningARXHouston, Winona3 hr
Aug 18, 9:45 PM CDTRiver Flood WarningARXOlmsted, Winona34 hr
Aug 18, 10:10 PM CDTFlash Flood WarningARXHouston, Winona3 hr
Aug 18, 10:10 PM CDTFlash Flood WarningARXHouston, Wabasha, Winona3 hr
Aug 18, 10:39 PM CDTFlash Flood WarningARXOlmsted3 hr
Aug 18, 11:15 PM CDTRiver Flood WarningARXOlmsted11 hr
Aug 18, 11:15 PM CDTRiver Flood WarningARXOlmsted30 hr
Aug 19, 12:56 AM CDTFlash Flood WarningARXDodge, Fillmore, Houston, Olmsted, Wabasha, Winona6 hr
Aug 19, 3:22 AM CDTRiver Flood WarningARXOlmsted26 hr
Aug 19, 8:58 AM CDTRiver Flood WarningARXFillmore, Houston8 hr
Aug 19, 10:15 AM CDTRiver Flood WarningARXWabasha43 hr

Nearby

Flash 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.