Area Forecast Discussion
Issued by NWS Twin Cities, MN

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FXUS63 KMPX 211709

Area Forecast Discussion
National Weather Service Twin Cities/Chanhassen MN
1209 PM CDT Fri Apr 21 2017

.Updated for 18Z Aviation Discussion...
Issued at 1203 PM CDT Fri Apr 21 2017


.SHORT TERM...(Today and tonight)
Issued at 303 AM CDT Fri Apr 21 2017

The short term concerns are mainly temperatures the next 24 hours
or so and the potential for frost.

Cool morning this morning with some temperatures dropping into the
lower and middle 30s is spots where clouds cleared longest. May
see some fog, especially in lower spots this morning over the west
and northern cwa with clear sky and lighter winds. We expect
plenty of sunshine during the day. Some cumulus development
possible over the southern area along with whatever remains to the
east this morning. High temperatures should range generally in
the upper 50s to lower 60s, which matches well with the mix down

With light winds and clear sky tonight, we expect temperatures to
drop off through the lower 30s to the east and remain in the mid
to upper 30s to the west. Added mention of patchy frost to the
eastern areas where temperatures are expected to be the coolest.
At the moment dont see readings reaching the critical 28F or hard
freeze. The day shift can take another look at this potential.

.LONG TERM...(Saturday through Thursday)
Issued at 303 AM CDT Fri Apr 21 2017

Saturday and Sunday...High pressure will slide through the region
during the day Saturday, centering itself south and east by late
in the day. The warmer return flow will keep mild temperatures in
place while its associated ridge axis aloft also sides to the
east. These features will combine to produce plenty of sunshine
with highs mainly in the mid 60s. A weak cold front will try to
split this ridge and surface high pressure but its impacts will be
rather weak. A few rain showers may try to approach from NW MN but
are not expected to hold together early Sunday morning. As high
pressure regains control Sunday, another mild and mostly clear day
is expected.

Monday through Thursday...A more active pattern is still in store
for much of next week although the details are still a bit in
flux. An open wave trough moving onshore the California coast
Sunday will progress east over the Rockies Monday morning. This
trough will help develop a low pressure center over WY/ND. This
system will shift eastward through MN into WI Monday night.
Chances increase for rain showers with this system, and
potentially a few thunderstorms in southern MN. This system ejects
into the Great Lakes Tuesday then there will generally be a break
in the action late Tuesday into Thursday. Models still depict an
amplified trough developing over the western CONUS Wednesday night
through Thursday, helping spawn a well-organized low pressure
system over the OK/TX panhandles around that time. Though chances
for precipitation will increase Thursday and beyond, details for
elements such as QPF and thunderstorms are still too early to


.AVIATION...(For the 18Z TAFS through 18Z Saturday afternoon)
Issued at 1203 PM CDT Fri Apr 21 2017

VFR conditions throughout. High pressure will bring light wind and
mostly clear skies. Winds should become light and variable
overnight as the surface high moves overhead, and then take up a
southwesterly direction on Saturday with speeds around 05 kts.

VFR conditions throughout. Wind direction is quite variable, but
overall should have a north/northeasterly component. Winds on
Saturday will be light and variable as well, but at this point the
most likely direction is southwest.

Sun...VFR. Wind NE/E at 05kt
Mon...VFR and windy with -shra possible late. Wind SSE at 15G25kt.
Tue...MVFR. Wind NW at 15G20kt.




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