Area Forecast Discussion
Issued by NWS Twin Cities, MN

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FXUS63 KMPX 260848

Area Forecast Discussion
National Weather Service Twin Cities/Chanhassen MN
348 AM CDT Fri May 26 2017

.SHORT TERM...(Today and tonight)
Issued at 348 AM CDT Fri May 26 2017

A rather quiet morning across the country with only some mid level
clouds streaming overhead locally. The biggest story today will be
the passage of a front this afternoon, bringing mainly a wind
shift but possibly a few storms along and east of I-35.
Instability is pretty meager, however, and models generally aren`t
too excited to break out convection other than the GFS. Some
pockets of greater instability ahead of the front may be the focus
for thunderstorm development, and think coverage should be
isolated-scattered in nature. With a fair amount of sun expected,
we should take full advantage of the encroaching thermal ridge
ahead of the front and reach the upper 70s across southern and
eastern MN.

West winds and a drier airmass will move in tonight. Clear skies
and seasonable temperatures are expected.

.LONG TERM...(Saturday through Thursday)
Issued at 348 AM CDT Fri May 26 2017

The extended forecast looks cool, cloudy, with several chances for
rain, but little in the way of rainfall amounts. On the bright side,
not expecting all day rainfall at any time during the period.
Afternoon high temperatures will be around 5 to 10 degrees below the
seasonal average for most of next week. Needless to day the rest of
the month is sure to disappoint if you like warm temperatures, lots
of sun, or strong thunderstorms.

There`s not much to say about the extended period. An upper level
trough over central Canada will send a series of shortwaves embedded
in northwest flow across the Upper Midwest. This will lead to cooler
air with limited moisture content. However, the boundary layer
moisture will be sufficient to produce a blanket of overcast skies
during the afternoon for Sunday and Monday. Couple this with some
weak forcing for a ascent and that explains the light QPF being
painted across the region by the models. Forecast soundings show a
thin layer of CAPE, so could see a few areas of deep convection with
a cool rain shower and perhaps some pea-size hail mixed in with a
few stronger cores.

Looking ahead into the middle of next week, there are stark
differences between the models with some guidance showing warmer
southwest flow while others prolong the current weather pattern. Did
not make any changes to the blended guidance, but at this time it
seems like the cooler solution should prevail since there is not a
strong signal that indicates the pattern will shift.


.AVIATION...(For the 06Z TAFS through 06Z Friday night)
Issued at 1250 AM CDT Fri May 26 2017

VFR conditions are expected through the period. Clouds may break
up some overnight, but should remain sct-bkn. A front will push
through Friday with a risk of a few storms along and east of I-35
during the afternoon and early evening.

KMSP...VFR conditions expected. If storms form Friday, best chance
would be between 19-22Z.

Sat...VFR. Slight chance showers. Winds light/variable.
Sun...VFR. Chance showers. Wind NW 10-15 kts.
Mon...VFR. Chance showers. Wind NW 10-15 kts.




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