Alert archive / Wisconsin / Flash Flood Warnings in 2016

Flash Flood Warning 48, NWS La Crosse, WI

September 21, 2016Clark County, Wisconsin

NWS La Crosse, WI issued this flash flood warning at Sep 21, 2016, 11:55 PM CDT for Clark County, Wisconsin. It was in force for 6 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 21, 2016, 11:55 PM CDT (04:55 UTC)
Expired
Sep 22, 2016, 5:45 AM CDT
In force
6 hr
Issued by
NWS La Crosse, WI
Area
Storm-based polygon
Flood severity
None

County Clark County, WI

The radar

The La Crosse radar (KARX), 97 km from the middle of the area, began a volume at 04:59 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

TimeReportWhereRemark
Sep 22, 5:00 AM CDTHEAVY RAIN 4.421 W Neillsville, WICO-OP OBSERVER STATION NEILLSVILLE 1W /NEIW3/. THE DURATION OF THE HEAVY RAIN EVENT WAS 24 HOURS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 4.9 hours before the alert went out and 203 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-pSkew-T log-p diagram, Green Bay/Straub, WI at 00:00Z on 2016-09-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Green Bay/Straub, WI at 00:00Z on 2016-09-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -29 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2148 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
-29 m²/s²
0-3 km storm-relative helicity
-43 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

860 
WGUS53 KARX 220455
FFWARX
WIC019-221045-
/O.NEW.KARX.FF.W.0048.160922T0455Z-160922T1045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
1155 PM CDT WED SEP 21 2016

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CLARK COUNTY IN CENTRAL WISCONSIN...

* UNTIL 545 AM CDT

* THIS IS AN EXTENSION OF THE PREVIOUS FLASH FLOOD WARNING FOR CLARK
  COUNTY. 

* AT 1147 PM CDT...LOCAL OFFICIALS HAVE DECLARED A STATE OF
  EMERGENCY IN CLARK COUNTY WITH OVER 30 ROADS CLOSED OR WASHED OUT.
  RAINFALL AMOUNTS OF 5 TO 8 INCHES HAVE BEEN RECEIVED. 

* TRAVEL IS NOT ADVISED IN CLARK COUNTY. NIGHTTIME TRAVEL INTO
  FLOODED ROADS CAN LEAD TO LIFE THREATENING EVENTS. 

* CREEKS...STREAMS...AND RIVERS CONTINUE TO RISE IN CLARK COUNTY.

* THE WORST AREA IS FOR FLOODING IS GENERALLY NORTH OF HIGHWAY 10.
  SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  NEILLSVILLE...ABBOTSFORD...SPENCER...COLBY...THORP...LOYAL...
  GREENWOOD...OWEN...DORCHESTER...SHORTVILLE...SHERWOOD...LYNN...
  AND LONGWOOD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A VERY DANGEROUS SITUATION. BE ESPECIALLY CAUTIOUS AT NIGHT
WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING.

&&

LAT...LON 4442 9032 4442 9072 4450 9080 4451 9080
      4451 9082 4460 9092 4503 9092 4503 9031

$$

BAUMGARDT

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 21, 7:06 PM CDTFlash Flood WarningARXClark5 hr
Sep 21, 11:11 PM CDTAreal Flood WarningARXLa Crosse3 hr
Sep 22, 12:48 AM CDTFlash Flood WarningARXCrawford, Richland, Vernon6 hr
Sep 22, 2:21 AM CDTRiver Flood WarningARXClark22 hr
Sep 22, 2:38 AM CDTRiver Flood WarningARXRichland, Vernon43 hr
Sep 22, 3:09 AM CDTAreal Flood WarningARXLa Crosse12 hr
Sep 22, 4:21 AM CDTRiver Flood WarningARXMonroe, Vernon29 hr
Sep 22, 5:28 AM CDTAreal Flood WarningARXClark24 hr
Sep 22, 6:51 AM CDTFlash Flood WarningARXCrawford, Richland, Vernon3 hr
Sep 22, 9:38 AM CDTFlash Flood WarningARXCrawford, Richland, Vernon3 hr
Sep 22, 11:20 AM CDTRiver Flood WarningARXCrawford, Grant10 days
Sep 22, 11:20 AM CDTRiver Flood WarningARXGrant9 days
Sep 22, 12:58 PM CDTAreal Flood WarningARXCrawford, Richland, Vernon21 hr

Nearby

Flash Flood Warnings in Wisconsin, 2016Every 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.