Time and Day: 0630 Monday
The Snapshot:
Clearing and cold today. Dry, clear and warmer weather will continue through the week.
The Science
Current Observations:
It is beginning to clear over
the mountains this morning. The temperature is 240f on the lower
mountain and 190f on the upper ridge. The RH is 91% and the barometer is 1021mb and
rising. The winds are a bit gusty and
out of the west.
The Forecast:
High pressure has begun to build over the PNW and is expected to bring
a dry and relatively warm weather for the remainder of the week.
The feature of interest: With
warm air advection occurring along the western slopes and cold air setting
in the eastern basin, a temperature inversion will form. This creates of few things for Stevens
Pass. East/west
pressure gradients along the Cascade crest will increase easterly winds. Freezing levels to the east will be near 4000’
while the freezing levels west of the crest could peak near 9000’. Some areas could see a low elevation cloud layer form or a best dense early morning fog. Sunshine will be abundant in the high mountains.
The Long Range: The high pressure strengthens under strong
southerly flow through the week. This
trend of warm, clear, dry weather is likely to continue through the upcoming weekend.
24hr Precipitation ending at 4am:
Today 24hr water: 0 snow:0
Tomorrow’s 24hr water:
0 snow: 0
Trend and Timing:
No precipitation is expected for the
next 7+ days.
|
24hr temperature
ending at 4 am:
Low: 22 High: 32
Freezing level: +- 4500’
Trend and Timing:
Diurnal temperatures fluctuations will
occur over the next few days with peak daytime temperatures reaching into the
high 30’s tomorrow.
|
24hr Winds (mph) ending at 4 am:
Base: 0-5 W
Ridge Top: 5-10 W
Trend and Timing:
Westerly flow will diminish today and
shift easterly tomorrow.
|
jM
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