5/1/2008 - May Day
- View Source
This Afternoon: Partly sunny, with a high near 57. South southwest wind around 7 mph.
Tonight: Mostly cloudy, with a low around 39. South wind 5 to 13 mph becoming east.
Friday: A 40 percent chance of rain. Mostly cloudy, with a high near 58. South southeast wind between 11 and 13 mph.
Friday Night: Scattered showers. Mostly cloudy, with a low around 42. South southeast wind 7 to 13 mph becoming west southwest. Chance of precipitation is 40%.
Saturday: Scattered showers before 11am. Partly sunny, with a high near 60. West wind around 10 mph. Chance of precipitation is 30%.
Saturday Night: Partly cloudy, with a low around 39.
Sunday: Mostly sunny, with a high near 60.
Sunday Night: Mostly cloudy, with a low around 41.
Monday: Partly sunny, with a high near 59.
Monday Night: Mostly cloudy, with a low around 40.
Tuesday: Mostly cloudy, with a high near 58.
Tuesday Night: Mostly cloudy, with a low around 42.
Wednesday: Mostly cloudy, with a high near 58.
LOCAL STORM REPORT
NWUS56 KSEW 302254
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
354 PM PDT WED APR 30 2008
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
0354 PM HAIL S SPANAWAY 47.10N 122.43W
04/30/2008 E0.25 INCH PIERCE WA TRAINED SPOTTER
MT. BAKER SKI AREA IS NOW COSED FOR THE 2007-08 SEASON
Thus, the Snow Report section will not be included again until sometime next fall.
Fire Danger Report:
All Washington Counties are under Low fire danger.
U.S. Geological Survey, Vancouver, Washington
University of Washington, Pacific Northwest Seismic Network, Seattle, Washington
CASCADES VOLCANO OBSERVATORY WEEKLY UPDATE
Friday, April 25, 2008 15:23 PDT (Friday, April 25, 2008 22:23 UTC)
MOUNT ST. HELENS VOLCANO (CAVW#1201-05-)
46.20°N 122.18°W, Summit Elevation 8363 ft (2549 m)
Volcano Alert Level: ADVISORY
Aviation Color Code: YELLOW
The pause in lava dome growth continues, and all our monitoring instruments show trifling or nil volcanic-related activity. This pause, which began in late January 2008, was recognized by absence of measurable growth among successive fixed-camera images, nearly quiescent seismicity, and the absence of tilt signals that might characterize extrusion of lava from the conduit.
We continue to monitor closely for evidence of renewed extrusion or other activity. The new lava dome remains hot in places; thus, it is capable of producing hot avalanches or small steam explosions that could cause hazardous conditions in and around the crater. Sudden melting of snow and ice could send small lahars onto the Pumice Plain and perhaps down the Toutle River as far as the Sediment Retention Structure (SRS). Ash clouds from explosions could affect aircraft.
One earthquake was located by the Pacific Northwest Seismograph Network over the last week, and other monitoring data showed no changes. Appreciable snowfall on Wednesday and Thursday re-established the 20-plus-foot-deep snow drift in front of the webcam at the U.S. Forest Service's Johnston Ridge Observatory, blocking views of the crater. Forecasted warmer weather should cause the drift to shrink some over the next several days.
The U.S. Geological Survey and the University of Washington continue to monitor the situation closely and will issue additional updates and changes in alert level as warranted.