Alert archive / Wisconsin / Flash Flood Warnings in 2015

Flash Flood Warning 14, NWS Twin Cities, MN

September 17, 2015Barron County, Polk County, Wisconsin

NWS Twin Cities, MN issued this flash flood warning at Sep 17, 2015, 7:41 AM CDT for Barron County, Polk County, Wisconsin. It was in force for 3 hr. 4 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: Sep 17, 2015, 7:41 AM CDT (12:41 UTC)
Expired: Sep 17, 2015, 10:45 AM CDT
In force: 3 hr
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Flood severity: None

Counties Barron County, WI, Polk County, WI

The radar

The Minneapolis radar (KMPX), 132 km from the middle of the area, began a volume at 12:41 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
Sep 17, 8:05 AM CDT	FLASH FLOOD	7 Se Turtle Lake, WI	INITIAL TIME ESTIMATED FROM RADAR. REPORT STATES THAT FLASH FLOODING WASHED AWAY PART OF 9TH AVE BETWEEN 5TH ST AND COUNTY RD P. THE ROAD WAS CLOSED AS OF 1135 AM.
Sep 17, 8:24 AM CDT	FLASH FLOOD	4 E Almena, WI	REPORT OF STREET FLOODING AT 15TH AVENUE WEST OF 10TH ST.
Sep 17, 8:30 AM CDT	FLASH FLOOD	3 N Barron, WI	STREET FLOODING REPORTED AT HIGHWAY 25 AT 17TH AVENUE.
Sep 17, 8:31 AM CDT	FLASH FLOOD	4 E Almena, WI	REPORT OF STREET FLOODING AT 15TH AVENUE WEST OF 10TH ST.

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, 0.7 hours before the alert went out and 135 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: 1229 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 620 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 328 m²/s²
0-3 km storm-relative helicity: 353 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 10.0

Open this sounding in Storm Lab

The text

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

527 
WGUS53 KMPX 171241
FFWMPX
WIC005-095-171545-
/O.NEW.KMPX.FF.W.0014.150917T1241Z-150917T1545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
741 AM CDT THU SEP 17 2015

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHWESTERN BARRON COUNTY IN NORTHWESTERN WISCONSIN...
  SOUTHEASTERN POLK COUNTY IN NORTHWESTERN WISCONSIN...

* UNTIL 1045 AM CDT
    
* AT 741 AM CDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING 
  HEAVY RAIN ACROSS THE WARNED AREA. 2 TO 4 INCHES OF RAIN HAVE 
  FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  BARRON...CAMERON...CLEAR LAKE...ALMENA...CLAYTON...PRAIRIE FARM...
  ARLAND...RICE LAKE AIRPORT...HILLSDALE AND REEVE.

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 3 INCHES ARE POSSIBLE IN THE 
WARNED AREA.

THIS INCLUDES U.S. HIGHWAY 53 BETWEEN MILE MARKERS 137 AND 138.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 4529 9185 4520 9204 4521 9223 4525 9230
      4536 9216 4546 9194 4543 9175

$$

ADL

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 17, 3:44 AM CDT	Special Weather Statement	MPX	Barron	46 min
Sep 17, 8:13 AM CDT	Special Weather Statement	MPX	Barron, Dunn	62 min
Sep 17, 9:02 AM CDT	Special Weather Statement	MPX	Dunn, Rusk	58 min

Nearby

Flash Flood Warnings in Wisconsin, 2015 Every flash flood warning in 2015

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.