Area Forecast Discussion
Issued by NWS Pocatello, 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
FXUS65 KPIH 190919

Area Forecast Discussion
National Weather Service Pocatello ID
319 AM MDT Wed Jul 19 2017

.Today through next Wednesday...A small plume of monsoon moisture
over southeast ID is setting off a few showers and tstms over the
southeast and northeast highlands this morning. The monsoon
moisture is expected to be out of the area by late morning...but
another surge will arrive on Thu. Isolated tstms are possible Thu
morn across the southeast highlands again...becoming a little more
widespread Thu aftn and eve. The upper flow turns more westerly
on Fri...cutting off the monsoon moisture. The pattern changes on
Mon as an upper low moves into southern BC with a trof over the
Pac NW. This increases the chances for tstms over the mtns Mon and
Tue aftn and eve...although precip amounts look rather light at
this time. By Wed...the precip chances shift to near the WY
border. Hedges


.AVIATION...Persistent upper ridging will maintain VFR conditions
into Thu. Isold tstms possible this morn near KDIJ due to a pocket
of monsoon moisture flowing thru eastern ID. Hedges


.FIRE WEATHER...Dry west-southwesterly winds aloft continue to
dominate nearly all of Southeastern Idaho today and Friday. The
exception being some unstable air slipping into the Bear lake area
this afternoon and on Thursday, reaching as far north as Gray`s
Lake. A weak and dry cold front will cross the Arco Desert early
Thursday afternoon, so far the wind gusts with frontal passage look
marginal for Red Flag purposes. As for new forecast developments,
there is still some indication of unstable air in Northeast Nevada
on Sunday afternoon with potential for outflow winds from any cells
close to our border, affecting fires around Rogerson to Malta. There
is a new disturbance expected to cross northern California
disturbance near the west coast that should move inland Monday and
Tuesday and bring afternoon showers and thunderstorms to this area
both days. RS



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