Area Forecast Discussion
Issued by NWS Boise, ID

Home | Current Version | Previous Version | Text Only | 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
FXUS65 KBOI 242057

Area Forecast Discussion
National Weather Service Boise ID
257 PM MDT Wed May 24 2017

.SHORT TERM...Tonight through Friday...Scattered clouds and
isolated showers developed along the Nevada border in the
vicinity of a cold front. The showers are expected to remain
south of the border as the front continues to shift to the south
through this evening. Breezy to locally windy conditions will
persist through this evening but will diminish after sunset. An
upper trough over southern British Columbia will move into the
area on Thursday and remain in place through Friday. Showers and a
slight chance of afternoon-evening thunderstorms will accompany
the trough, mainly across the north on Thursday and then mainly in
SW Idaho on Friday. Best chance for showers will be over the
higher terrain. The winds will be weaker Thursday through Friday,
except gusty winds will accompany the thunderstorms. Temperatures
will be cooler on Thursday, then slightly warmer on Friday; in
general - below normal through the period.

.LONG TERM...Friday night through Wednesday...An upper level
ridge off the coast will continue to amplify, and by Sunday the
axis is expected to move directly over the CWA. This pattern is
expected to stay in place through the long term which will keep
temperatures above normal, and conditions dry. The ECMWF, and
more-so the GFS, are indicating some isolated mountain showers in
the afternoons under the ridge from leftover moisture. While it is
possible, the forecast reflects a more likely drier solution.


.AVIATION...VFR with mostly clear skies. Surface winds 15-20 kts
with gusts to 25 kts in most locations. Areas in the Snake Plain
near KMUO and eastward will experience surface winds 20-30 kts
with gusts up to 40 kts. All winds calming after 25/06Z. Winds
aloft near 10 KFT MSL: West 30-40 kts then after 25/00Z becoming
northwest 20- 25 kts.





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