Area Forecast Discussion
Issued by NWS La Crosse, WI

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FXUS63 KARX 180831

Area Forecast Discussion
National Weather Service La Crosse WI
331 AM CDT Tue Oct 18 2016

.SHORT TERM...(Today and tonight)
Issued at 331 AM CDT Tue Oct 18 2016

At 3 AM, a cold front extended from Green Bay Wisconsin to Des
Moines Iowa. With the best 850 mb moisture transport north of the
Interstate 90 corridor, no showers or storms are located along
this front. The 18.00z meso models are in good agreement that the
showers and isolated storms currently north of Interstate 94 will
move quickly east and northeast away from the area early this
morning leaving today and tonight dry. Model soundings continue to
show that dry air will quickly move into the area by mid to late
morning. As a result, there should be plenty of sunshine this
afternoon. With the 925 mb temperatures approximately 10C cooler
than Monday afternoon, high temperatures will only climb into the
lower and mid-60s.

.LONG TERM...(Wednesday through Monday)
Issued at 331 AM CDT Tue Oct 18 2016

On Wednesday night, a northern stream short wave trough may bring
some scattered showers to areas south of the Interstate 90
corridor. In the wake of this system, the 925 mb temperatures will
cool into the 0 to 4C range. As a result, the high temperatures on
Thursday will only range from the upper 40s to mid-50s. Normally
the high temperatures for this day are in the mid- and upper 50s.

On Friday morning, the combination of light winds and clear skies
will allow temperatures to fall into the lower to mid 30s. This
will result in the potential for frost across the area. As a
reminder, Frost Advisories/Freeze Warnings are only being issued
for the counties along the Mississippi and Wisconsin rivers. As of
yet, the coldest temperature for La Crosse WI this autumn is 36F
on October 8th. Their latest 32F or coldest temperature is
November 7th in 1900.

As warm air advection develops in the wake of the departing ridge on
Friday night, a few scattered showers may develop across western
Wisconsin. High temperatures in the wake of this system will be
near to a few degrees above normal for the upcoming weekend.


.AVIATION...(For the 06Z TAFS through 06Z Tuesday night) ]
Issued at 1134 PM CDT Mon Oct 17 2016

MVFR to IFR conditions are expected at the TAF sites in BR and low
stratus through early Tuesday morning. A cold front will work
through the region later tonight bringing drier air in its wake.
Before it moves through a moist airmass will lead to areas of fog
and low stratus at times with ceilings lowering to around 700 ft
and KRST and visibility down to around 1SM or less at KLSE.
Conditions will improve to VFR after sunrise Tuesday as the drier
air moves in. Plan on ceilings rising to around 4kft by mid
morning Tuesday and scattering out. VFR conditions are then
expected into Tuesday night.


.CLIMATE...Monday Records
Issued at 331 AM CDT Tue Oct 18 2016

Several records were set on Monday, October 17.

La Crosse WI...

Warmest minimum temperature - 65F - previous record for this date
was 64F in 1994.

Highest October dew point ever (70F) and latest 70F dew point.
Including yesterday there have only been 7 October days in which
the dew point has reached 70 degrees. The last time was October 8
2007. There have only been 4 Octobers since 1934 that there has
been at least one 70F dew point. Prior to yesterday the latest 70F
dew point was October 15 in 1962.

Rochester MN...

Highest dew point (68F) ever so late in the year. Prior to
yesterday the latest 68F was October 13th in 1962.

It was the 4th highest October dew point on a calendar day. The
only October days with higher dew points was October 7 2007 (72F),
October 4 2005 (70F), and October 3 2005 (70F).




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