Area Forecast Discussion
Issued by NWS Denver/Boulder, CO

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FXUS65 KBOU 232101
AFDBOU

Area Forecast Discussion
National Weather Service Denver/Boulder CO
301 PM MDT Fri Jun 23 2017

.SHORT TERM...(This evening through Saturday)
Issued at 300 PM MDT Fri Jun 23 2017

Stratus stayed in over most of the plains today to produce a
cooler than the already cool forecast we had. Temperatures have
peaked only in the mid to upper 50s along the urban corridor.
An upper ridge from Arizona over the west coast will continue northwesterly
flow aloft across the area through Saturday. Upslope low level
flow will continue into tomorrow as well as high surface pressure
remains draped over the Great Plains. Some cloud cover will likely
remain over the plains tonight, more than originally forecast, so
have gone ahead and warmed the lows by a couple degrees. The
upper ridge will build in slightly to allow for warmer
temperatures tomorrow, readings in the low 70s are likely over the
plains, and 60s to 70s over the high terrain. Warming will allow
for weak destabilization, enough for a slight chance of showers
and weak storms mainly over elevated terrain.

.LONG TERM...(Saturday night through Friday)
Issued at 300 PM MDT Fri Jun 23 2017

Colorado will remain under a moderate northwest flow pattern
through the weekend. Airmass will remain mainly stable on the
plains while temperatures remaining cool with readings in the 70s
on Sunday. There will be a slight chance of late day showers and
thunderstorms in the mountains with slight instability in elevated
terrain.

The ridge aloft over the Great Basin will move across Colorado
and into the central plains by Tuesday. This will allow
temperatures to warm back into the 90s. Expect there will be
isolated late day thunderstorms with some moisture streaming in
the westerly flow. Overall coverage of storms looks to be low. An
upper trof and cold front will move over Colorado Thursday and
Friday time frame with a cooling trend and a better chance for
storms. Only minor changes to current forecast needed.

&&

.AVIATION...(For the 18Z TAFS through 18Z Saturday afternoon)
Issued at 300 PM MDT Fri Jun 23 2017

IFR-MVFR ceilings remaining over the sites close to upslope
terrain (APA and BJC). VFR elsewhere, and should improve at the
other sites by 00z. Wind forecast overnight continues to be
difficult as surface low is forecast to be somewhere around DEN
overnight and into Saturday morning. Southeasterly winds due to
the high surface pressure over the eastern plains should dominate
the area, however some weak signals of the weak surface low moving
east of DEN which would bring in northwesterly winds. Potential
of fog is low at this point, but will keep monitoring weather and
model data.

&&

.BOU WATCHES/WARNINGS/ADVISORIES...
None.
&&

$$

SHORT TERM...Kriederman
LONG TERM...Entrekin
AVIATION...Kriederman



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