Area Forecast Discussion
Issued by NWS Denver/Boulder, CO

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FXUS65 KBOU 270830

Area Forecast Discussion
National Weather Service Denver/Boulder CO
230 AM MDT Thu Oct 27 2016

.SHORT TERM...(Today and tonight)
Issued at 230 AM MDT Thu Oct 27 2016

An upper level ridge will be over the area today with dry wsw flow
aloft.  At the sfc a lee trough will dvlp over east of the mtns. 850-
700 mb temps will rise aound 5 degrees c so aftn highs over nern CO
will top out in the upper 70s to lower 80s in most locations.
Record high at Denver is 80 which could be tied or bkn.

For tonight their will be some increase in high lvl cloud cover but
it will remain dry with mild overnight lows.

.LONG TERM...(Friday through Wednesday)
Issued at 230 AM MDT Thu Oct 27 2016

A ridge of high pressure will be centered over Texas on Friday as
a weak upper trough moves into the central CA coast. The flow
aloft over CO will gradually increase fm the southwest Friday
afternoon and evening. There will be an increase in high cloud
cover but likely not enough to prevent the loss of another 80
degree high temperature record for Denver. There will be some weak
mid level QG ascent around but very limited moisture as this
system passes to the west and north of the state Friday night into
Saturday morning. Saturday into Sunday...the flow aloft will be
more westerly as a flat mid level ridge moves back over the area.
Although temperatures will remain well above normal over the will be slightly cooler due to some weak mid level
cold air advection. The next Pacific system will move into the
central Rockies Sunday night into Monday with an increasing
southwesterly flow aloft in CO. There ll be a better chance of
showers in the mountains primarily west/southwest facing
aspects...with gusty winds developing across the cwa. Bora type
setup...with a moderate to strong west/southwesterly winds
aloft...mid level cold air advection...and a stronger GJT_DEN sfc
pressure gradient. The strongest winds appear to be around 18z
Monday. Tuesday through Wednesday...some cooling with temperatures
closer to seasonal normals. An increasing southwesterly flow aloft
Tuesday night into Wednesday...with a ridge over the southeastern
U.S. and a more significant Pacific trough moving approaching the
Great Basin. As a result...there could be a better chance of
showers developing in the mountains by Wednesday. Not much
agreement however with the ECMWF showing the stronger trough while
the other models show a weaker more open wave and progressive


.AVIATION...(For the 12Z TAFS through 12Z Friday morning) Issued
at 230 AM MDT Thu Oct 27 2016

VFR today and tonight. SW winds will continue this morning and
then become more sely by 18z. Winds will gradually shift back to
drainage by 03z this evening.




LONG TERM...Cooper
AVIATION...RPK is the U.S. government's official web portal to all federal, state and local government web resources and services.