Alert archive / Wisconsin / Flash Flood Warnings in 2015

Flash Flood Warning 9, NWS Twin Cities, MN

September 2, 2015Chippewa County, Wisconsin

NWS Twin Cities, MN issued this flash flood warning at Sep 2, 2015, 3:11 PM CDT for Chippewa County, Wisconsin. It was in force for 2 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: Sep 2, 2015, 3:11 PM CDT (20:11 UTC)
Expired: Sep 2, 2015, 5:15 PM CDT
In force: 2 hr
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Flood severity: None

County Chippewa County, WI

The radar

The La Crosse radar (KARX), 127 km from the middle of the area, began a volume at 20:14 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 2, 3:30 PM CDT	FLASH FLOOD	Chippewa Falls, WI	NUMEROUS STREETS AND INTERSECTIONS COVERED WITH STANDING WATER. RELAYED BY LOCAL BROADCAST METEOROLOGIST AND TIME ESTIMATED.
Sep 2, 4:20 PM CDT	HEAVY RAIN 3.6	5 Ese Chippewa Falls, WI	STORM TOTAL RAINFALL REPORT RELAYED BY LOCAL BROADCAST METEOROLOGIST.

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, 8.2 hours before the alert went out and 181 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: 93 J/kg
Mixed-layer CIN: -227 J/kg
Mixed-layer LCL: 1030 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 124 m²/s²
0-3 km storm-relative helicity: 166 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.

685 
WGUS53 KMPX 022011
FFWMPX
WIC017-022215-
/O.NEW.KMPX.FF.W.0009.150902T2011Z-150902T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
311 PM CDT WED SEP 2 2015

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

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

* UNTIL 515 PM CDT
    
* AT 310 PM CDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING 
  HEAVY RAIN ACROSS THE WARNED AREA. TWO TO THREE INCHES OF RAIN 
  HAVE FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  CHIPPEWA FALLS...LAKE HALLIE...LAKE WISSOTA...CADOTT...TILDEN AND
  BATEMAN.

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE IN THE 
WARNED AREA.

THIS INCLUDES U.S. HIGHWAY 53 BETWEEN MILE MARKERS 94 AND 105.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT ENTER OR CROSS FLOWING WATER OR WATER OF UNKNOWN DEPTH. 

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

&&

LAT...LON 4501 9108 4486 9108 4488 9165 4506 9165

$$

DWE

1 follow-up statement

538 
WGUS73 KMPX 022207
FFSMPX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
507 PM CDT WED SEP 2 2015

WIC017-022217-
/O.EXP.KMPX.FF.W.0009.000000T0000Z-150902T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHIPPEWA WI-
507 PM CDT WED SEP 2 2015

...THE FLASH FLOOD WARNING FOR SOUTHERN CHIPPEWA COUNTY WILL EXPIRE
AT 515 PM CDT...

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

LAT...LON 4501 9108 4486 9108 4488 9165 4506 9165

$$

DWE

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 2, 12:38 PM CDT	Special Weather Statement	MPX	Dunn	112 min
Sep 2, 1:03 PM CDT	Flash Flood Warning	MPX	Chippewa, Dunn	4 hr
Sep 2, 1:49 PM CDT	Special Weather Statement	MPX	Eau Claire	41 min
Sep 2, 2:04 PM CDT	Special Weather Statement	MPX	Chippewa	116 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.