Tomorrow is forecast to be Much Cooler than today.
Forecast for Lower Columbia Basin
Updated: 9:27 PM PDT on July 5, 2009
Rest of Tonight
Partly cloudy with isolated showers and thunderstorms late in the evening...then mostly cloudy with scattered showers and thunderstorms overnight. Breezy. Lows 60 to 68. West wind 15 to 25 mph with gusts to around 35 mph. Chance of precipitation 40 percent.
Monday
Partly cloudy. A 20 percent chance of showers and thunderstorms in the morning. Windy. Not as warm. Highs 79 to 85. West wind 20 to 30 mph.
... Red flag warning remains in effect until 11 am PDT Monday for a combination of winds and low relative humidities this evening followed by thunderstorms producing abundant lightning tonight...
A red flag warning remains in effect until 11 am PDT Monday.
A cold front will cross the Oregon Cascades this evening and continue moving northeast across the lower Columbia Basin through the overnight hours into Monday morning. Winds ahead of the front will increase this evening to around 10 to 20 mph. The winds in combination with relative humidities ranging from 8 to 15 percent will result in critical fire weather conditions.
Scattered thunderstorms will develop tonight with periods of enhanced lightning activity across the lower elevation Grasslands. Rainfall amounts are expected to be relatively light.
Precautionary/preparedness actions...
A red flag warning means that critical fire weather conditions are either occurring now... or will shortly. A combination of strong winds and low relative humidity will create explosive fire growth potential. For additional weather information... check our web site at www.Weather.Gov/Pendleton.
Volcanic Activity Statement
DTG: 20090705/2303Z
VAAC: WASHINGTON
VOLCANO: ST. HELENS 1201-05 PSN: N4611 W12210
AREA: US-WASHINGTON
SUMMIT ELEV: 8363 FT (2549 M)
ADVISORY NR: 2009/001
INFO SOURCE: GOES-11. VOLCANO WEB CAMERA. PILOT REPORT.
ERUPTION DETAILS: NO ERUPTION... RESUSPENDED ASH
OBS VA DTG: 05/2230Z
OBS VA CLD:
FCST VA CLD +6HR: 06/0430Z
FCST VA CLD +12HR: 06/1030Z
FCST VA CLD +18HR: 06/1630Z
RMK: AT 2215Z A PILOT REPORTED ASH DRIFTING NE FROM MSH. WEB CAM SUGGESTS THIS IS RESUSPENDED ASH DUE TO STRONG WINDS. NO ERUPTION IS OCCURRING. ... BIRCH