Alert archive / Wisconsin / Red Flag Warnings in 2007

Red Flag Warning 1, NWS La Crosse, WI

April 22, 2007Adams County, Juneau County, Wisconsin

NWS La Crosse, WI issued this red flag warning at Apr 22, 2007, 9:59 AM CDT for Adams County, Juneau County, Wisconsin. It took effect at Apr 22, 2007, 12:00 PM CDT. It was in force for 8 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 22, 2007, 9:59 AM CDT (14:59 UTC)
In effect from: Apr 22, 2007, 12:00 PM CDT
Expired: Apr 22, 2007, 8:00 PM CDT
In force: 8 hr
Issued by: NWS La Crosse, WI

Counties Adams County, WI, Juneau County, WI

The radar

The La Crosse radar (KARX), 101 km from the middle of the area, began a volume at 15:03 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.

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 3.0 hours before the alert went out and 158 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2064 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 188 m²/s²
0-3 km storm-relative helicity: 147 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.

000 
WWUS83 KARX 221459
RFWARX

RED FLAG WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
959 AM CDT SUN APR 22 2007

...RED FLAG WARNING FROM NOON TO 8 PM TODAY FOR PARTS OF CENTRAL
WISCONSIN...

.LOW PRESSURE ADVANCING ACROSS THE CENTRAL PLAINS AND HIGH PRESSURE
ANCHORED OVER THE OHIO VALLEY WILL MAINTAIN A TIGHT PRESSURE
GRADIENT AND BRISK SOUTH WINDS ACROSS THE DISTRICTS TODAY. THE
BRISK SOUTH WINDS WILL CONTINUE TO PULL A SEASONABLY WARM AND DRY
AIRMASS INTO THE AREA. THE COMBINATION OF AFTERNOON HIGHS IN THE
75 TO 80 DEGREE RANGE...MINIMUM HUMIDITIES OF 25 TO 30 PERCENT AND
SOUTH WINDS OF 13 TO 18 MPH WITH GUSTS TO 25 MPH WILL PRODUCE RED
FLAG OR NEAR RED FLAG CONDITIONS OVER THE AREA THIS AFTERNOON INTO
EARLY THIS EVENING. THE APPROACHING LOW IS EXPECTED TO SPREAD
SHOWERS AND THUNDERSTORMS ACROSS THE AREA AFTER 8 PM INTO THE
EARLY MORNING HOURS OF MONDAY.

WIZ043-044-222300-
/O.NEW.KARX.FW.W.0001.070422T1700Z-070423T0100Z/
JUNEAU-ADAMS-
INCLUDING THE CITY OF...MAUSTON
959 AM CDT SUN APR 22 2007

...RED FLAG WARNING IN EFFECT UNTIL 8 PM CDT THIS EVENING...

THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A RED FLAG
WARNING...WHICH IS IN EFFECT FROM NOON UNTIL 8 PM CDT THIS
EVENING.

CRITICALLY DRY FUELS...ALONG SOUTH WINDS OF 13 TO 18 MPH AND GUSTS
TO 25 MPH...ALONG WITH TEMPERATURES OF 75 TO 80 AND MINIMUM
RELATIVE HUMIDITIES OF 25 TO 30 PERCENT WILL PRODUCE DANGEROUS
FIRE WEATHER AND BURNING CONDITIONS THIS AFTERNOON INTO EARLY THIS
EVENING. 

A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF
STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL
CREATE EXPLOSIVE FIRE GROWTH POTENTIAL.

$$

RRS

1 follow-up statement

000 
WWUS83 KARX 230106
RFWARX

RED FLAG WARNING
NATIONAL WEATHER SERVICE LA CROSSE WI
806 PM CDT SUN APR 22 2007

...RED FLAG WARNING HAS EXPIRED...

.SHOWERS AND RISING HUMIDITIES HAVE ENDED THE FIRE WEATHER THREAT.

WIZ043-044-230215-
/O.EXP.KARX.FW.W.0001.000000T0000Z-070423T0100Z/
JUNEAU-ADAMS-
INCLUDING THE CITY OF...MAUSTON
806 PM CDT SUN APR 22 2007

...RED FLAG WARNING HAS EXPIRED...

THE RED FLAG WARNING IS NO LONGER IN EFFECT. 

SHOWERS AND RISING HUMIDITIES HAVE ENDED THE FIRE WEATHER THREAT
AND THUS THE RED FLAG WARNING HAS BEEN ALLOWED TO EXPIRE.

$$

RABERDING

Nearby

Red Flag Warnings in Wisconsin, 2007 Every red flag warning in 2007

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.