Alert archive / Minnesota / Flash Flood Warnings in 2016

Flash Flood Warning 11, NWS La Crosse, WI

July 23, 2016Olmsted County, Winona County, Minnesota

NWS La Crosse, WI issued this flash flood warning at Jul 23, 2016, 1:32 PM CDT for Olmsted County, Winona County, Minnesota. It was in force for 3 hr. 2 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: Jul 23, 2016, 1:32 PM CDT (18:32 UTC)
Expired: Jul 23, 2016, 4:30 PM CDT
In force: 3 hr
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Flood severity: None

Counties Olmsted County, MN, Winona County, MN

The radar

The La Crosse radar (KARX), 75 km from the middle of the area, began a volume at 18:36 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
Jul 23, 2:30 PM CDT	FLASH FLOOD	3 Sw Elba, MN	A COUPLE OF TRAIL BRIDGES WERE WASHED OUT IN WHITEWATER STATE PARK. SOME CAMPSITES WERE FLOODED AS WELL.
Jul 23, 3:30 PM CDT	HEAVY RAIN 3.27	5 Sw Elba, MN	COCORAHS STATION ELBA 4.7 SW /MN-OL-991/.

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, 6.5 hours before the alert went out and 151 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: 2703 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 782 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: 4 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.4

Open this sounding in Storm Lab

The text

As transmitted.

647 
WGUS53 KARX 231832
FFWARX
MNC109-169-232130-
/O.NEW.KARX.FF.W.0011.160723T1832Z-160723T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
132 PM CDT SAT JUL 23 2016

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHWESTERN WINONA COUNTY IN SOUTHEASTERN MINNESOTA...
  SOUTHEASTERN OLMSTED COUNTY IN SOUTHEASTERN MINNESOTA...

* UNTIL 430 PM CDT

* AT 128 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. TWO TO THREE INCHES OF RAIN
  HAVE ALREADY FALLEN. AN ADDITIONAL INCH OF RAIN IS POSSIBLE
  THROUGH 430 PM. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* CAMPERS NEAR RIVERS AND STREAMS SHOULD CONSIDER EVACUATION AS
  WATER LEVELS WILL RISE RAPIDLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  WHITE WATER STATE PARK...ST. CHARLES...CHATFIELD...EYOTA...
  LEWISTON...ELGIN...DOVER...ROLLINGSTONE...ALTURA...SARATOGA...
  FREMONT...UTICA...TROY...AND ELBA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLOODING IS OCCURRING OR IS IMMINENT. IT IS IMPORTANT TO KNOW WHERE
YOU ARE RELATIVE TO STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME
KILLERS IN HEAVY RAINS. CAMPERS AND HIKERS SHOULD AVOID STREAMS OR
CREEKS.

&&

LAT...LON 4411 9225 4411 9208 4412 9208 4411 9181
      4385 9181 4385 9226

$$

ROGERS

2 follow-up statements

157 
WGUS73 KARX 232024
FFSARX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
324 PM CDT SAT JUL 23 2016

MNC109-169-232130-
/O.CON.KARX.FF.W.0011.000000T0000Z-160723T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WINONA MN-OLMSTED MN-
324 PM CDT SAT JUL 23 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 PM CDT FOR
SOUTHWESTERN WINONA AND SOUTHEASTERN OLMSTED COUNTIES...

AT 319 PM CDT...AUTOMATED RAIN GAUGES INDICATED THREE TO FIVE INCHES
OF RAIN HAVE FALLEN OVER THE WARNED AREA. WHILE THE HEAVIEST
RAINFALL HAS NOW MOVED EASTWARD INTO SOUTHWEST WISCONSIN, UP TO AN
ADDITIONAL HALF INCH OF RAIN IS POSSIBLE THROUGH 430 PM. FLASH
FLOODING WILL CONTINUE AS WATER MOVES INTO AND THROUGH THE RIVER
SYSTEM.

CAMPERS NEAR RIVERS AND STREAMS SHOULD CONSIDER EVACUATION AS WATER
LEVELS WILL RISE RAPIDLY. 

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
ST. CHARLES...CHATFIELD...EYOTA...LEWISTON...ELGIN...DOVER...
ROLLINGSTONE...ALTURA...SARATOGA...FREMONT...UTICA...TROY...AND ELBA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

FLOODING IS OCCURRING OR IS IMMINENT. IT IS IMPORTANT TO KNOW WHERE
YOU ARE RELATIVE TO STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME
KILLERS IN HEAVY RAINS. CAMPERS AND HIKERS SHOULD AVOID STREAMS OR
CREEKS.

&&

LAT...LON 4411 9225 4411 9208 4412 9208 4411 9181
      4385 9181 4385 9226

$$

ROGERS

490 
WGUS73 KARX 232125
FFSARX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
425 PM CDT SAT JUL 23 2016

MNC109-169-232131-
/O.EXP.KARX.FF.W.0011.000000T0000Z-160723T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WINONA MN-OLMSTED MN-
425 PM CDT SAT JUL 23 2016

...THE FLASH FLOOD WARNING FOR SOUTHWESTERN WINONA AND SOUTHEASTERN
OLMSTED COUNTIES WILL EXPIRE AT 430 PM CDT...

THE HEAVY RAIN HAS ENDED. AS WATER MOVES INTO AND THROUGH THE RIVER
SYSTEM, CONTINUE TO MONITOR RIVER LEVELS AND BE PREPARED TO SEEK
HIGHER GROUND IF NECESSARY. PLEASE CONTINUE TO HEED ANY REMAINING
ROAD CLOSURES.

LAT...LON 4411 9225 4411 9208 4412 9208 4411 9181
      4385 9181 4385 9226

$$

ROGERS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 8:46 AM CDT	Special Weather Statement	ARX	Dodge, Mower	59 min
Jul 23, 8:54 AM CDT	Special Weather Statement	ARX	Winona	36 min
Jul 23, 9:27 AM CDT	Severe Thunderstorm Warning	ARX	Dodge, Mower	38 min
Jul 23, 9:49 AM CDT	Severe Thunderstorm Warning	ARX	Olmsted, Wabasha	41 min
Jul 23, 10:05 AM CDT	Areal Flood Advisory	ARX	Mower	115 min
Jul 23, 10:29 AM CDT	Special Weather Statement	ARX	Wabasha	61 min
Jul 23, 12:43 PM CDT	Areal Flood Advisory	ARX	Olmsted	3 hr
Jul 23, 1:10 PM CDT	Areal Flood Advisory	ARX	Winona	3 hr
Jul 23, 1:26 PM CDT	River Flood Warning	ARX	Olmsted, Winona	25 hr

Nearby

Flash Flood Warnings in Minnesota, 2016 Every flash flood warning in 2016

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.