Marine Weather and Tide Forecast for Spokane Valley, WA

SYNOPSIS
Cooler and wetter weather pattern sticks around for the next week with several opportunities for showers and afternoon thunderstorms.

DISCUSSION
Today through Wednesday: As the upper low moves inland, there is an ongoing threat for afternoon showers and thunderstorms, especially southeast Washington and the southern Panhandle. Shear looks weaker than yesterday but with cape around 200-600 J/kg storms have been capable of producing multiple lightning strikes, especially near the Camas Prairie. Showers will continue in the evening near the Canadian border and drop south this evening and into the overnight hours will drop more beneficial rains for the area. As the upper low moves into southern Idaho tomorrow afternoon, expecting a similar situation as today with showers and isolated thunderstorms starting around 10 AM to 12 PM in the northern mountains. Storms will be capable of producing half inch hail and gusty outflow winds up to 40 mph tomorrow. By Wednesday, this activity is limited to northeast Washington and the ID Panhandle.

Thursday through Monday: An unsettled pattern continues for the Inland Northwest with a few shortwaves moving through. Expecting rounds of mostly beneficial showers to continue through the period.
A system coming through Saturday has the best potential for widespread light rain around 0.05-0.25" for much of the region.
Central Washington does not appear to get much rain in this pattern unfortunately. High temperatures during this time period are forecasted to be in the 60s and low 70s.

AVIATION
18Z TAFS: Additional showers will develop through the day today, first in the southeast (PUW/LWS) and expanding into the Spokane/C'dA area in the afternoon. Some isolated t-storms are possible for KLWS (20% chance). There is a lesser chance for thunder for KGEG-KSFF-KCOE-KPUW (10-15% chance). Storms will be moving slowly today around 10 mph. VFR to MVFR ceilings will improve to VFR briefly this afternoon before returning back to MVFR for KGEG-KCOE-KSFF-KPUW around 8-12z (70-90% chance).
Central WA sites have a smaller chance of showers (10-20% chance)
between now and 0z and will remain VFR.

FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: Low confidence in thunderstorms at GEG/SFF/COE/PUW/LWS today but the best chance is at LWS (20% chance). High confidence in VFR conditions for central WA.

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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 43 62 45 63 41 64 / 40 20 20 10 10 0 Coeur d'Alene 42 60 44 61 41 63 / 50 40 20 20 20 0 Pullman 40 55 42 59 39 60 / 40 40 20 10 0 0 Lewiston 46 63 49 67 45 68 / 40 40 10 10 0 0 Colville 38 65 41 65 36 66 / 50 60 40 40 30 10 Sandpoint 42 60 45 59 43 62 / 50 50 30 40 50 20 Kellogg 44 55 46 55 43 59 / 40 60 30 40 30 10 Moses Lake 46 70 44 72 41 70 / 20 20 10 0 0 0 Wenatchee 49 72 50 68 45 70 / 30 10 10 0 0 0 Omak 44 72 44 71 41 70 / 50 20 20 0 0 0

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