Area Forecast Discussion
Issued by NWS Pocatello, ID

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819
FXUS65 KPIH 182003
AFDPIH

Area Forecast Discussion
National Weather Service Pocatello ID
203 PM MDT MON JUL 18 2016

.DISCUSSION...Hot and breezy conditions expected to continue into
Thu as southwest flow aloft persists ahead of an upper trof off
the Pac NW coast. Monsoon moisture remains to the south and east
of ID for the most part...but may brush the southeast corner this
eve and again Thu eve. The upper trof sweeps inland Thu night and
turns the upper flow more westerly. This will have the effect of
pushing any monsoon moisture out of the area...and shaving a few
degrees off the temps thru the weekend. Hedges

&&

.AVIATION...Dry sw flow aloft is resulting in clear skies and
breezy conditions. Winds are expected to diminish early this eve.
Hedges


&&

.FIRE WEATHER...Red Flag Warning remains in effect through 9PM this
evening for fire weather zones 410 and 413 below 6000 feet due to
the combination of gusty winds and low relative humidity values.
Winds aloft should remain in the 20 to 30 mph range through the
night tonight, so winds will remain gusty above the thermal belt. Do
anticipate valley inversions to form overnight across effected zones
so will allow the Red Flag to expire on schedule. Winds aloft remain
relatively strong for Tuesday, and minimum relative humidity values
will fall below 15 percent for many areas below 6000 feet. Winds
will be very close to Red Flag Criteria, with gusts close to 30 mph
in the Snake Plain and 25 mph for the mountains, so critical fire
conditions will be possible. Held off on continuing the Red Flag
through tomorrow due to the fact winds should subside beneath
inversions overnight, but an additional headline may be warranted
for tomorrow due to winds being very close to criteria. Isolated
thunderstorm possible over far SE Idaho late this afternoon and
early evening but mainly dry conditions expected through the
remainder of the week due to a lack of moisture. Winds will once
again be breezy Wed-Fri with some potential for additional Red Flag
conditions, particularly Thu-Fri with the passage of an upper-level
trough and subsequent passage of an attending dry cold front.
AD/Hedges

&&

.PIH Watches/Warnings/Advisories...
Red Flag Warning until 9 PM MDT this evening for IDZ410-413.

&&

$$



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