Area Forecast Discussion
Issued by NWS Tucson, AZ

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270
FXUS65 KTWC 181612
AFDTWC

Area Forecast Discussion
National Weather Service Tucson AZ
910 AM MST Sat Nov 18 2017

.SYNOPSIS...Dry conditions will continue through next week.
Slightly cooler temperatures will occur this weekend and early next
week, with freezing temperatures possible Sunday and Monday mornings
for eastern valley locations. Daytime temperatures rebound quickly
to near record or record levels by Thanksgiving.

&&

.DISCUSSION...Clear skies for most of the state with decreasing
cirrus across the far southeast corner. Expect this trend to
continue with clear skies everywhere this afternoon. We may see the
return of some patchy cirrus late tonight into Sunday morning along
with slightly elevated east winds through the Gila River Valley
behind a weak cold front. If skies remain clear enough and winds
don`t kick up too much, we`ll see the first widespread freezing
temps through the Sulphur Springs Valley early Sunday morning. As
such, the Freeze Watch was upgraded to a Warning by the previous
shift, valid 1 AM to 8 AM MST Sunday morning. Prior to that though,
it should be a very pleasant day across southeast Arizona, albeit
high temperatures will still top out 4 to 8 degrees above average.
No updates this morning. Please see the remaining sections for more
details.

&&

.AVIATION...Valid thru 19/18Z.
Mostly clear skies with diurnal and terrain driven winds less
than 12 kts. Aviation discussion not updated for TAF amendments.

&&

.FIRE WEATHER...Dry conditions are likely through the end of next
week. Lingering breeziness is possible east of Tucson into early
this evening as a trough departs the area, otherwise winds will
follow typical upslope/downvalley patterns through much of the
upcoming week.

&&

.PREV DISCUSSION...High clouds have thinned considerably since last
night while a weak cold front continues to sag south across the
state. Cooler high temperatures this weekend but still running above
normal. The cooler airmass will also lead to colder overnight lows
with the coldest eastern valleys around freezing. Upgraded the
freeze watch to warning for both Sunday and Monday mornings for
portions of Cochise and Graham counties.

After the nice relative cool down this weekend, high temperatures
will ramp back up to well above normal values next week with record
or near record highs once again returning to the area during the
first half of the 4 day Thanksgiving holiday weekend.

&&

.TWC WATCHES/WARNINGS/ADVISORIES...

 Freeze Warning from 1 AM to 8 AM MST Sunday for AZZ507>509.
 Freeze Warning from 1 AM to 8 AM MST Monday for AZZ507>509.

&&

$$

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