Alert archive / Wisconsin / Flash Flood Warnings in 2011

Flash Flood Warning 8, NWS Twin Cities, MN

July 16, 2011Chippewa County, Dunn County, Wisconsin

NWS Twin Cities, MN issued this flash flood warning at Jul 16, 2011, 8:23 AM CDT for Chippewa County, Dunn County, Wisconsin. It was in force for 3 hr. 1 report 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 16, 2011, 8:23 AM CDT (13:23 UTC)
Expired: Jul 16, 2011, 11:30 AM CDT
In force: 3 hr
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Flood severity: None

Counties Chippewa County, WI, Dunn County, WI

The radar

The La Crosse radar (KARX), 144 km from the middle of the area, began a volume at 13:25 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 16, 8:48 AM CDT	FLASH FLOOD	1 S Bloomer, WI	WATER OVER ROAD SOUTH OF BLOOMER ALONG TOWNSHIP ROAD.

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, 1.4 hours before the alert went out and 168 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: 989 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 480 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 169 m²/s²
0-3 km storm-relative helicity: 192 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

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

950 
WGUS53 KMPX 161323
FFWMPX
WIC017-033-161630-
/O.NEW.KMPX.FF.W.0008.110716T1323Z-110716T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
823 AM CDT SAT JUL 16 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CHIPPEWA COUNTY IN WEST CENTRAL WISCONSIN...
  NORTHEASTERN DUNN COUNTY IN WEST CENTRAL WISCONSIN...

* UNTIL 1130 AM CDT

* AT 820 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE      
  WARNED AREA. RAINFALL ESTIMATES OF 2 TO 3 INCHES HAVE OCCURRED     
  ACROSS MUCH OF CENTRAL CHIPPEWA AND NORTHEAST DUNN COUNTY THIS     
  MORNING.  

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  CHIPPEWA FALLS...BATEMAN...BLOOMER...BOYD...CADOTT...COLFAX...
  CORNELL...EAGLETON...HOLCOMBE...JIM FALLS...LAKE HALLIE...LAKE
  WISSOTA...NEW AUBURN...RIDGELAND...SAND CREEK AND STANLEY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF AROUND 1 INCH ARE POSSIBLE IN THE 
WARNED AREA.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...
COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND
OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING.

&&

LAT...LON 4486 9165 4520 9191 4521 9188 4520 9153
      4529 9153 4529 9092 4487 9092

$$
DWE

1 follow-up statement

287 
WGUS73 KMPX 161622
FFSMPX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1122 AM CDT SAT JUL 16 2011

WIC017-033-161637-
/O.EXP.KMPX.FF.W.0008.000000T0000Z-110716T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHIPPEWA WI-DUNN WI-
1122 AM CDT SAT JUL 16 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR NORTHEASTERN DUNN
AND CHIPPEWA COUNTIES WILL BE ALLOWED TO EXPIRE AT 1130 AM CDT...

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.

LAT...LON 4486 9165 4520 9191 4521 9188 4520 9153
      4529 9153 4529 9092 4487 9092

$$

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 16, 6:24 AM CDT	Areal Flood Advisory	MPX	Pierce, Saint Croix	3 hr
Jul 16, 6:46 AM CDT	Areal Flood Advisory	MPX	Barron, Chippewa, Dunn, Eau Claire	3 hr
Jul 16, 8:01 AM CDT	Areal Flood Advisory	MPX	Dunn, Eau Claire, Pepin, Pierce	3 hr

Nearby

Flash Flood Warnings in Wisconsin, 2011 Every flash flood warning in 2011

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.