Alert archive / Wisconsin / Flash Flood Warnings in 2015

Flash Flood Warning 12, NWS Twin Cities, MN

September 8, 2015Eau Claire County, Pepin County, Wisconsin

NWS Twin Cities, MN issued this flash flood warning at Sep 8, 2015, 6:11 AM CDT for Eau Claire County, Pepin 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: Sep 8, 2015, 6:11 AM CDT (11:11 UTC)
Expired: Sep 8, 2015, 9:00 AM CDT
In force: 3 hr
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Flood severity: None

Counties Eau Claire County, WI, Pepin County, WI

The radar

The La Crosse radar (KARX), 100 km from the middle of the area, began a volume at 11:14 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 8, 7:08 AM CDT	FLASH FLOOD	9 Ssw Fall Creek, WI	WATER COVERING THE ROAD AT INTERSECTION OF ROUTE D AND ROUTE HH IN TOWN OF CLEAR CREEK

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, 11.2 hours before the alert went out and 142 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: 2 J/kg
Mixed-layer CIN: -222 J/kg
Mixed-layer LCL: 1495 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 144 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

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

615 
WGUS53 KMPX 081111
FFWMPX
WIC035-091-081400-
/O.NEW.KMPX.FF.W.0012.150908T1111Z-150908T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
611 AM CDT TUE SEP 8 2015

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAU CLAIRE COUNTY IN WEST CENTRAL WISCONSIN...
  PEPIN COUNTY IN WEST CENTRAL WISCONSIN...

* UNTIL 900 AM CDT
    
* AT 607 AM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING 
  HEAVY RAIN WILL MOVE ACROSS THE WARNED AREA. WITH THE WARNED AREA 
  HAVING SATURATED SOILS FROM RECENT HEAVY RAINFALL...FLASH FLOODING 
  MAY BEGIN SHORTLY.

* SOME LOCATIONS THAT MAY EXPERIENCE FLOODING INCLUDE... EAU 
  CLAIRE...DURAND...AUGUSTA...FALL CREEK...PEPIN...FAIRCHILD... 
  FOSTER...ARKANSAW...PORCUPINE...LAKE EAU CLAIRE COUNTY PARK...ELLA 
  AND ALLEN.

THIS INCLUDES INTERSTATE 94 IN WISCONSIN BETWEEN MILE MARKERS 71 AND
86.
 
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.

PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.

&&

LAT...LON 4460 9200 4456 9204 4442 9208 4441 9211
      4444 9222 4454 9216 4454 9213 4464 9209
      4469 9184 4468 9165 4473 9165 4485 9092
      4460 9093

$$

JPC

1 follow-up statement

492 
WGUS73 KMPX 081355
FFSMPX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
855 AM CDT TUE SEP 8 2015

WIC035-091-081404-
/O.EXP.KMPX.FF.W.0012.000000T0000Z-150908T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
EAU CLAIRE WI-PEPIN WI-
855 AM CDT TUE SEP 8 2015

...THE FLASH FLOOD WARNING FOR EAU CLAIRE AND PEPIN COUNTIES WILL
EXPIRE AT 900 AM CDT...

THE HEAVY RAIN HAS ENDED...AND FLOODING IS NO LONGER EXPECTED TO POSE
A THREAT.

LAT...LON 4460 9200 4456 9204 4442 9208 4441 9211
      4444 9222 4454 9216 4454 9213 4464 9209
      4469 9184 4468 9165 4473 9165 4485 9092
      4460 9093

$$

BORGHOFF

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 8, 1:59 AM CDT	Flash Flood Watch	MPX	Eau Claire, Pepin	7 hr

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.