Monday, March 2, 2009

EDIS: Flash flood watch - Northern California burn areas


Flash Flood Watch, Possible Debris flows in Wildland Fire Burn Areas including Butte Lightning Complex and Humbolt Fire.

THE NATIONAL WEATHER SERVICE IN SACRAMENTO HAS EXTENDED THE * FLASH FLOOD WARNING FOR DEBRIS FLOWS FOR... NORTHEASTERN BUTTE COUNTY IN NORTHERN CALIFORNIA... THIS INCLUDES THE CITIES OF...PULGA...BRUSH CREEK RS... WESTERN PLUMAS COUNTY IN NORTHERN CALIFORNIA... THIS INCLUDES THE CITIES OF...QUINCY...CHESTER... EAST CENTRAL TEHAMA COUNTY IN NORTHERN CALIFORNIA... * UNTIL 945 PM PST * AT 324 PM PST... NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUES TO INDICATE MODERATE TO OCCASIONALLY HEAVY RAIN OVER THE BURN AREAS... WHICH MAY TRIGGER DEBRIS FLOW OVER THE WARNED AREA THROUGH THIS EVENING. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO TWAIN... SENECA... PAXTON... MOCCASIN... MILL CREEK... LAKE ALMANOR... CARIBOU... BUTTE MEADOWS...BELDEN AND ALMANOR DEBRIS FLOWS ARE POSSIBLE IN THE VICINITY OF THESE BURN SCARS... INCLUDING THE BUTTE LIGHTNING COMPLEX ADJACENT TO HIGHWAY 70 NORTHEAST OF LAKE OROVILLE AND THE HUMBOLDT FIRES. THE DEBRIS FLOWS CAN IMPACT TRAVEL ALONG AREA ROADWAYS...ESPECIALLY ALONG HIGHWAY 70...THE NORTH FORK FEATHER RIVER CANYON...AND THE MIDDLE FORK FEATHER RIVER CANYON. HIGHWAYS 32 AND 89 MAY ALSO BE IMPACTED BY DEBRIS FLOWS. DEBRIS FLOWS... INCLUDING MUD AND ROCK SLIDES ARE EXPECTED WITH THIS HEAVIER RAINFALL. DEBRIS FLOWS CAN POTENTIALLY TRAP AND KILL PEOPLE CAUGHT IN THEIR PATHS.

Area: NATIONAL WEATHER SERVICE SACRAMENTO CA

Affected Counties or parts of: Plumas, Butte, Tehama

Sent: 2009-03-02T18:13:23-08:00
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THE NATIONAL WEATHER SERVICE IN SACRAMENTO HAS ISSUED AN * URBAN AND SMALL STREAM FLOOD ADVISORY FOR... STANISLAUS COUNTY IN CENTRAL CALIFORNIA...SACRAMENTO COUNTY IN CENTRAL CALIFORNIA... YUBA COUNTY IN CENTRAL CALIFORNIA... NEVADA COUNTY IN CENTRAL CALIFORNIA...PLACER COUNTY IN CENTRAL CALIFORNIA...TUOLUMNE COUNTY IN CENTRAL CALIFORNIA...SAN JOAQUIN COUNTY IN CENTRAL CALIFORNIA...EL DORADO COUNTY IN CENTRAL CALIFORNIA...CALAVERAS COUNTY IN CENTRAL CALIFORNIA... AMADOR COUNTY IN CENTRAL CALIFORNIA... * UNTIL 615 PM PST * AT 1220 PM PST... DOPPLER RADAR INDICATED A LINE OF HEAVY SHOWERS MOVING THROUGH THE EASTERN PORTION OF THE SACRAMENTO VALLEY AND ACROSS THE NORTHERN SAN JOAQUIN VALLEY. THE LINE WAS LOCATED FROM NEAR GRASS VALLEY... SOUTHWARD TO AUBURN... TO EAST OF CITRUS HEIGHTS AND ELK GROVE...TO GALT TO LODI. THE LINE WILL BE MOVING EAST AT ABOUT 15 TO 20 MPH THROUGH THE MOTHERLODE NORTH OF INTERSTATE 80... AND ACROSS EASTERN SACRAMENTO COUNTY THROUGH 1 TO 2 PM. HEAVY RAIN MAY CAUSE PONDING OF WATER ON INTERSTATE 80... HIGHWAY 50... AND HIGHWAY 16 IN EASTERN SACRAMENTO COUNTY EARLY THIS AFTERNOON. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE ELEVATED LEVELS ON SMALL CREEKS AND STREAMS... AND PONDING OF WATER IN URBAN AREAS... HIGHWAYS... STREETS AND UNDERPASSES AS WELL AS OTHER POOR DRAINAGE AREAS AND LOW LYING SPOTS.

Instruction:
IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS FLOODED ROADS. FIND ALTERNATE ROUTES. IT TAKES ONLY A FEW INCHES OF SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.

Affected Counties or parts of: Yuba, Tuolumne, Stanislaus, Sacramento, Placer, Butte, El Dorado, Calaveras, Amador, San Joaquin, Nevada, Sierra

Sent: 2009-03-02T18:10:30-08:00

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