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Next 12 Hours

Forecast data from the National Digital Forecast Database.

5 Day Forecast

• Wednesday
• 
• High: 68 °
• Low: 50 °
• Chance of T-Storms

• Thursday
• 
• High: 66 °
• Low: 48 °
• Rain Showers

• Friday
• 
• High: 73 °
• Low: 43 °
• Chance of Rain

• Saturday
• 
• High: 77 °
• Low: 50 °
• Clear

• Sunday
• 
• High: 84 °
• Low: 54 °
• Partly Cloudy

Area forecast discussion 
National Weather Service Spokane Washington 
828 PM PDT Tue Jun 18 2013 


Synopsis... 
scattered showers and a few thunderstorms will continue Tuesday 
night. By Wednesday a wet and cool weather pattern will take hold 
of the region. Showery and cool conditions will continue through 
the week, with a drying and warming trend expected this weekend. 
Wetter and cooler weather will return early next week. 


&& 


Discussion... 
radar at 815pm shows and area of rain moving up from northeast 
Oregon into extreme eastern Washington. Have tweaked the forecast a bit to 
account for this precipitation. But judging from all of the models 
along with the satellite imagery, I don't think this is the main 
band of precipitation that will set up later tonight. Rather that 
is going to originate from southeast Oregon/southwest Idaho and is 
currently seen as cooling cloud tops in the infrared imagery. This will 
move just a bit farther to the east and then take a turn to the 
north, moving over the Idaho Panhandle later tonight and Wednesday. 


New model guidance (00z NAM and 21z sref) have continued to show a 
slower timing to the above scenario, keeping the heavy rain from 
reaching the British Columbia border until around 5am Wednesday. Given the fact 
that this feature is still way down by Boise, I can't completely 
discount this slower timing. The NAM has also sped up the end to 
the heavy rain on Wednesday, which would mean a shorter event with 
less rain than currently forecast. Will wait for the 00z GFS to 
start trickling in before making any timing adjustments. 


The NAM continues to depict a rather narrow band of rain, about 
the width of the Panhandle and would actually keep Spokane dry 
(with all the rain to the east of spokane) until Wednesday 
afternoon. It's Worth noting that the NAM doesn't have any 
depiction about the aforementioned area of rain headed our way. 


Also made some tweaks to the minimum temperatures tonight along 
with the cloud cover. Kept the mention of thunder in the forecast 
for this evening but it looks very minimal. All the models show 
the precipitation coming from the stable scheme, not the 
convective scheme. So confidence in thunder is very low. 


May provide one more discussion update with the 00z GFS. Rj 


&& 


Aviation... 
00z tafs: another round of showers and thunderstorms will affect all 
of the taf sites this evening with moderate rain and some MVFR 
cigs. A band of moderate to heavy rain will develop late tonight 
along the Washington/Idaho border, and persist through much of Wednesday. This 
will bring IFR conditions to most of the eastern taf sites all day. 
Kgeg will be on the western edge of this band and conditions may 
improve a bit in the late afternoon. Ksff and certainly kcoe will 
feel the brunt of this event. To the south, kpuw and lws may see 
some improvement in the afternoon but I didn't have enough 
confidence in this. Kmwh and keat should remain out of the action 
for the most part and will actually have better conditions tomorrow 
than today. Rj 






&& 


Preliminary point temps/pops... 
Spokane 51 54 45 55 44 61 / 100 100 80 80 50 60 
Coeur D'Alene 52 54 46 54 42 60 / 100 100 100 90 50 60 
Pullman 49 53 44 56 42 60 / 100 100 70 60 30 60 
Lewiston 56 58 49 64 44 67 / 100 100 70 60 20 50 
Colville 54 63 50 57 48 67 / 90 100 100 100 60 50 
Sandpoint 54 56 46 53 45 60 / 100 100 100 100 60 60 
Kellogg 50 51 44 51 39 57 / 100 100 100 100 50 60 
Moses Lake 54 66 51 65 49 69 / 20 50 50 60 30 30 
Wenatchee 52 66 52 64 51 68 / 30 40 50 60 40 30 
Omak 54 66 51 64 50 69 / 20 80 70 80 60 50 


&& 


Otx watches/warnings/advisories... 
Idaho...none. 
Washington...none. 
&& 


$$