347
FXUS66 KOTX 181733
AFDOTX

Area Forecast Discussion
National Weather Service Spokane WA
1033 AM PDT Sat May 18 2024

.SYNOPSIS...
Cooler and unsettled weather will continue through the weekend.
This morning will be quite chilly, with the potential for frost
in the sheltered valleys of north Idaho, northeast and north
central Washington. A wetter low pressure system is expected on
Wednesday and will keep temperatures below normal.

&&

.DISCUSSION...

Updates: KOTX 12Z sounding still showing what would be considered
a conditionally unstable airmass overhead with a generally low
tropopause at near 280mb, as such with a vort max well resolved in
the satellite imagery progged to drop down to the southeast today
the forecast this afternoon and on tonight consisting of showers
with some mention of weak short lived pulse thunderstorms remains
more or less in place. /Pelatti

&&

.AVIATION...
12Z TAFS: Conditionally unstable airmass with a disturbance
dropping down northwest to southeast across the aviation area will
allow for some mention of showers and possible weak short lived
pulse thunderstorms. Still for the most part VFR conditions are
expected. /Pelatti

FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: Of course the
disturbance dropping down could very well take a different
trajectory through and miss some of the TAF sites that have
mention of potential precip in them. In addition some stratus
could form tonight into Monday morning due to any resulting
rainfall today and tonight. /Pelatti

-----------------------

Confidence descriptors:
Low - Less than a 30 percent chance
Moderate - 30 to 70 percent chance
High - Greater than a 70 percent chance

For additional probabilistic information for NWS Spokane airports,
please refer to the Aviation Dashboard on our webpage:
https://www.weather.gov/otx/avndashboard

&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        62  40  60  39  69  44 /  20  40  50  20   0   0
Coeur d`Alene  60  39  56  39  66  42 /  30  40  60  20  10   0
Pullman        59  36  57  38  63  42 /  10  30  30  10  10   0
Lewiston       69  43  64  45  71  48 /   0  20  20  10  10   0
Colville       61  33  63  34  71  38 /  70  70  70  20  10  10
Sandpoint      58  36  54  38  64  41 /  70  60  80  20  30  10
Kellogg        56  40  52  41  61  43 /  40  50  70  20  40  10
Moses Lake     67  39  69  42  76  46 /  10  10  10   0   0   0
Wenatchee      63  42  67  44  73  50 /  10  10  10   0   0   0
Omak           66  39  68  41  76  47 /  40  30  20  10   0   0

&&

.OTX WATCHES/WARNINGS/ADVISORIES...
ID...None.
WA...None.
&&

$$