Chester Morse Reservoir, part of Seattle's water supply, formed by damming the Cedar River.

The surprise October record snowfall

The surprise October record snowfall

The surprise October record snowfall

The surprise October record snowfall

Storm totals: 18 inches of snow at Baltimore-Washington Airport, 18 inches at Dulles, and16.4 inches at Reagan Airport.

Snowmageddon: 17.8 inches at Reagan, 25 inches at Baltimore-Washington, and 32.4 inches at Dulles Airport. By contrast, Chicago's biggest snowstorm on January 26-27, 1967, produced 23.0 inches of snow while Washington, D.C., has had 4 storms during the same time period producing over 23 inches of snow.

Storm totals: 18 inches of snow at Baltimore-Washington Airport, 18 inches at Dulles, and16.4 inches at Reagan Airport.

Snowmageddon: 17.8 inches at Reagan, 25 inches at Baltimore-Washington, and 32.4 inches at Dulles Airport. By contrast, Chicago's biggest snowstorm on January 26-27, 1967, produced 23.0 inches of snow while Washington, D.C., has had 4 storms during the same time period producing over 23 inches of snow.

Hitting right on, the January 30, 2010 snowstorm produced 4-6 inches of snow across the region.

Snowmageddon: 17.8 inches at Reagan, 25 inches at Baltimore-Washington, and 32.4 inches at Dulles Airport. By contrast, Chicago's biggest snowstorm on January 26-27, 1967, produced 23.0 inches of snow while Washington, D.C., has had 4 storms during the same time period producing over 23 inches of snow.

Storm totals: 18 inches of snow at Baltimore-Washington Airport, 18 inches at Dulles, and16.4 inches at Reagan Airport.

Storm totals: 18 inches of snow at Baltimore-Washington Airport, 18 inches at Dulles, and16.4 inches at Reagan Airport.

Snowmageddon: 17.8 inches at Reagan, 25 inches at Baltimore-Washington, and 32.4 inches at Dulles Airport. By contrast, Chicago's biggest snowstorm on January 26-27, 1967, produced 23.0 inches of snow while Washington, D.C., has had 4 storms during the same time period producing over 23 inches of snow.

Storm totals: 18 inches of snow at Baltimore-Washington Airport, 18 inches at Dulles, and16.4 inches at Reagan Airport.

Snowmageddon: 17.8 inches at Reagan, 25 inches at Baltimore-Washington, and 32.4 inches at Dulles Airport. By contrast, Chicago's biggest snowstorm on January 26-27, 1967, produced 23.0 inches of snow while Washington, D.C., has had 4 storms during the same time period producing over 23 inches of snow.

Aurora Australis, the Southern Lights. As with Aurora Borealis, these are seen during strong geomagnetic events.

Aurora Australis, the Southern Lights. As with Aurora Borealis, these are seen during strong geomagnetic events.

Aurora Australis, the Southern Lights. As with Aurora Borealis, these are seen during strong geomagnetic events.

Aurora Australis, the Southern Lights. As with Aurora Borealis, these are seen during strong geomagnetic events.

Aurora Australis, the Southern Lights. As with Aurora Borealis, these are seen during strong geomagnetic events.

Aurora Australis, the Southern Lights. As with Aurora Borealis, these are seen during strong geomagnetic events.

Aurora Australis, the Southern Lights. As with Aurora Borealis, these are seen during strong geomagnetic events.

Aurora Australis, the Southern Lights. As with Aurora Borealis, these are seen during strong geomagnetic events.

Aurora Australis, the Southern Lights. As with Aurora Borealis, these are seen during strong geomagnetic events.

Aurora Australis, the Southern Lights. As with Aurora Borealis, these are seen during strong geomagnetic events.

Aurora Australis, the Southern Lights. As with Aurora Borealis, these are seen during strong geomagnetic events.

Aurora Australis, the Southern Lights. As with Aurora Borealis, these are seen during strong geomagnetic events.

Aurora Australis, the Southern Lights. As with Aurora Borealis, these are seen during strong geomagnetic events.

Aurora Australis, the Southern Lights. As with Aurora Borealis, these are seen during strong geomagnetic events.

Aurora Australis, the Southern Lights. As with Aurora Borealis, these are seen during strong geomagnetic events.

Aurora Australis, the Southern Lights. As with Aurora Borealis, these are seen during strong geomagnetic events.

Aurora Australis, the Southern Lights. As with Aurora Borealis, these are seen during strong geomagnetic events.

Aurora Australis, the Southern Lights. As with Aurora Borealis, these are seen during strong geomagnetic events.

Aurora Australis, the Southern Lights. As with Aurora Borealis, these are seen during strong geomagnetic events.

Aurora Australis, the Southern Lights. As with Aurora Borealis, these are seen during strong geomagnetic events.

Altostratus.

Altostratus Translucidus.

Cumulonimbus.

Cumulonimbus with magnificent anvil.

Cumulonimbus.

Cumulonimbus. Line of developing cumulonimbus Note pileus caps on the two right hand clouds

Cumulonimbus.

Cumulonimbus without anvil.

Cumulonimbus with anvil.

Cumulonimbus.

Cumulonimbus with anvil top.

Cumulonimbus.

Cumulonimbus with anvil top in the distance.

Cumulonimbus - squall line associated with cold front.