Area Forecast Discussion
Issued by NWS Denver/Boulder, CO

Home | Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
FXUS65 KBOU 251554

Area Forecast Discussion
National Weather Service Denver/Boulder CO
954 AM MDT Sun Sep 25 2016

Issued at 954 AM MDT Sun Sep 25 2016

No changes to the forecast necessary this time around. Skies are
sunny across the region as high pressure builds in from the north
and northwest. Pressure gradients should decrease through the
afternoon and gusty winds on the northeast plains should diminish
over time. Cooler temperatures at lower and mid levels this
morning will hold afternoon high temperatures down somewhat. But
the mid and upper 60s will make for a pleasant fall afternoon.


.SHORT TERM...(Today and tonight)
Issued at 325 AM MDT Sun Sep 25 2016

Weak upper level trof axis will be moving across Eastern Colorado
today with a continued subsident airmass in place. There still is
a fair amount of lower and mid level moisture over the mountains
and portions of the plains early this morning. The trend will be
for for this moisture to dissipate during the morning hours. There
will be a strong stable layer around 600mb this afternoon which
will keep a very stable and cool airmass in place. Temperatures
today will be cooler today with readings only in the 60s over the
plains. Skies look to be clear tonight as temperatures drop into
the mid 30s to lower 40s over the plains so patchy frost possible.

.LONG TERM...(Monday through Saturday)
Issued at 325 AM MDT Sun Sep 25 2016

An upper ridge over the west coast will spread east across the
state Monday and Tuesday as an upper cutoff low over the Baja
retrogrades and weakens to southern California. Look for dry and warming
weather, with temperatures returning to above normal under clear

On Wednesday, the upper low will pull up and absorb moisture from
an east Pacific disturbance and send it into western Colorado by
Wednesday night. This will bring a slight chance of showers and
thunderstorms to the mountains in the evening and overnight. Southwesterly
flow aloft will transport that system into the Great Basin on
Thursday to spread showers and a few possible thunderstorms across
the forecast area Thursday and Friday. Temperatures will remain
warmer than normal each day with the southwest flow aloft.

A large Pacific Northwest upper low will dig along the west coast
Saturday to increase southwest flow aloft. Moisture ahead of the
system will allow for a slight chance of afternoon showers and
possible thunderstorms.


.AVIATION...(For the 18Z TAFS through 18Z Monday afternoon)
Issued at 954 AM MDT Sun Sep 25 2016

No aviation impacts through the next 24 hours with unlimited
ceilings and visibilities. Winds should remain out of the
northeast as the center of the surface high remains over south
central Wyoming. Drainage southerly winds will return after the
sun goes down.




SHORT TERM...Entrekin
LONG TERM...Kriederman
AVIATION...Dankers is the U.S. government's official web portal to all federal, state and local government web resources and services.