Re: Flood Warning

e0083 b5awa00000
u n Urgent-NWS_USJ-A_FLOOD_W 12/31 396

NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA 220 PM PST SAT DEC 31 2005

...A FLOOD WARNING HAS BEEN ISSUED FOR THE MERCED RIVER AT POHONO BRIDGE...


RECENT HEAVY RAIN AND EXCESSIVE RUNOFF WILL BRING CONTINUED
RISES ALONG THE UPPER MERCED RIVER THROUGH THIS EVENING.

HISTORICALLY...WHEN FORECAST OR OBSERVED STAGE AT POHONO
BRIDGE REACHES 10.0 FEET...WESTERN PORTION OF NORTH PINES
CAMPGROUND...LOCATED AT THE EAST END OF YOSEMITE VALLEY BETWEEN THE
CONFLUENCE OF THE MERCED RIVER AND TENAYA CREEK...BEGINS TO FLOOD.
WATER RISES TO THE BASE OF THE SWINGING BRIDGE DOWNSTREAM FROM CHAPEL
MEADOW.

WHEN FORECAST OR OBSERVED STAGE AT POHONO BRIDGE REACHES 10.5 FEET...
WATER TOPS THE SWINGING BRIDGE DOWNSTREAM FROM CHAPEL MEADOW. OVERFLOW
FROM WOSKI POND FLOODS ACCESS ROAD(NORTHSIDE DRIVE) LEADING OUT OF THE
WEST ENTRANCE OF THE PARK.

WHEN FORECAST OR OBSERVED STAGE AT POHONO BRIDGE REACHES 11.5 FEET...
THE SEWAGE PUMPING RELAY STATION AT NORTH PINES CAMPGROUND BECOMES FLOODED.

&&

FORECASTS ARE BASED ON PRESENT AND FORECASTED METEOROLOGICAL
AND HYDROLOGIC CONDITIONS AT TIME OF ISSUANCE.


MERCED RIVER AT
POHONO 1 PM STAGE 8.8 FT
FORECAST TO RISE ABOVE FLOOD STAGE SATURDAY AFTERNOON
FORECAST TO CREST NEAR 13.0 FT LATE SATURDAY EVENING
THEN FORECAST TO RECEDE TO NEAR 12.0 FT SUNDAY MORNING
FLOOD STAGE 10.0 FT


UNLISTED FORECAST POINTS ARE EXPECTED TO REMAIN BELOW MONITOR STAGE.
ALL THOSE AFFECTED BY RIVER CONDITIONS SHOULD REMAIN ALERT FOR RAPID
CHANGES AND FOR POSSIBLE FORECAST REVISIONS.

MONITOR STAGE...
INITIAL ACTION STAGE...ALONG UNLEVEED SECTIONS OF THE RIVER...
OVERBANK FLOWS MAY COVER LOW-LYING LANDS AND LOCAL ROADS. ALONG
FLOOD CONTROL PROJECT LEVEES...LEVEE PATROLS BECOME MANDATORY. AT A
WEIR...THE POINT AT WHICH OVERFLOW BEGINS AT A WEIR.

FLOOD STAGE...
ALONG UNLEVEED SECTIONS OF THE RIVER...OVERBANK FLOWS ARE OF
SUFFICIENT MAGNITUDE TO CAUSE CONSIDERABLE INUNDATION OF LAND AND
ROADS...OR SIGNIFICANT HAZARD TO LIFE AND PROPERTY. ALONG FLOOD
CONTROL PROJECT LEVEES...THIS IS THE STAGE AT WHICH THE FLOW WITHIN
THE LEVEE IS AT MAXIMUM DESIGN CAPACITY.

DANGER STAGE...
ALONG FLOOD CONTROL PROJECT LEVEES...FLOW IS GREATER THAN MAXIMUM
DESIGN CAPACITY. THIS IS GENERALLY ONE FOOT ABOVE FLOOD STAGE.

$$
DURFEE



EDIS-12-31-05 1433 PST

e0118 b4bwa00000
u n Urgent-NWS_REV-ANOTHER_S 12/31 396
ANOTHER STORM SYSTEM WILL MOVE INTO THE SIERRA SUNDAY AFT...

NATIONAL WEATHER SERVICE RENO NV
723 PM PST SAT DEC 31 2005

...ANOTHER STORM SYSTEM WILL MOVE INTO THE SIERRA SUNDAY AFTERNOON...

.ANOTHER IN A SERIES OF INTENSE STORM SYSTEMS WILL MOVE INTO THE
SIERRA LATE SUNDAY AFTERNOON AND CONTINUE THROUGH MONDAY
EVENING. SNOW LEVELS WILL BE LOWER THAN WITH PREVIOUS STORMS.
SNOW LEVELS WILL RANGE FROM 6000 FEET IN LASSEN COUNTY TO AROUND
7500 FEET IN THE TAHOE BASIN SUNDAY AFTERNOON. BY EARLY MONDAY
MORNING SNOW LEVELS WILL DROP TO 5000 FEET IN LASSEN TO AROUND
LAKE LEVEL AT TAHOE...TO 7500 FEET IN MONO COUNTY. EXPECT UP TO 2
FEET OF SNOW ABOVE 8000 FEET WITH 6 INCHES TO A FOOT AT LAKE
LEVEL.

TRAVEL IS STRONGLY DISCOURAGED THIS HOLIDAY WEEKEND. MANY AREA
ROADS REMAIN CLOSED DUE TO FLOODING...MUD SLIDES...ROCK SLIDES...
AND SNOW COVER.


CAZ073-011400-
/O.CAN.KREV.WS.W.0007.000000T0000Z-060101T0600Z/
/O.CON.KREV.WS.A.0001.060102T0000Z-060103T0600Z/
MONO-
INCLUDING THE CITIES OF...BRIDGEPORT...COLEVILLE...LEE VINING...
MAMMOTH LAKES
723 PM PST SAT DEC 31 2005

...WINTER STORM WARNING IS CANCELLED...
...WINTER STORM WATCH REMAINS IN EFFECT FROM SUNDAY AFTERNOON
THROUGH MONDAY EVENING...

THE NATIONAL WEATHER SERVICE IN RENO HAS CANCELLED THE WINTER
STORM WARNING. A WINTER STORM WATCH REMAINS IN EFFECT FROM SUNDAY
AFTERNOON THROUGH MONDAY EVENING.

SNOW AND RAIN HAVE ENDED THIS EVENING. STRONG RIDGETOP WINDS WILL
STILL CAUSE AREAS OF BLOWING SNOW ABOVE 8000 FEET.

A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW ACCUMULATIONS THAT MAY CREATE HAZARDOUS WINTER DRIVING
CONDITIONS. CONTINUE TO MONITOR THE LATEST FORECASTS.

$$

CAZ071-072-NVZ002-011400-
/O.CON.KREV.WS.A.0001.060102T0000Z-060103T0600Z/
LASSEN-EASTERN PLUMAS-EASTERN SIERRA COUNTIES-
GREATER LAKE TAHOE AREA-
INCLUDING THE CITIES OF...PORTOLA...SUSANVILLE...WESTWOOD...
SIERRAVILLE...SOUTH LAKE TAHOE...TAHOE CITY...TRUCKEE...
MARKLEEVILLE...GLENBROOK...INCLINE VILLAGE
723 PM PST SAT DEC 31 2005

...WINTER STORM WATCH REMAINS IN EFFECT FROM SUNDAY AFTERNOON
THROUGH MONDAY EVENING...

A WINTER STORM WATCH REMAINS IN EFFECT FROM SUNDAY AFTERNOON
THROUGH MONDAY EVENING.

A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW ACCUMULATIONS THAT MAY CREATE HAZARDOUS WINTER DRIVING
CONDITIONS. CONTINUE TO MONITOR THE LATEST FORECASTS.

$$






EDIS-12-31-05 1924 PST

e0127c5awa00000
d n News-NWS_USJ-THE_FLOOD_W 12/31 251THE FLOOD WARNING FOR THE MERCED RIVER AT POHONO BRIDGE

NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA
831 PM PST SAT DEC 31 2005


...THE FLOOD WARNING FOR THE MERCED RIVER AT POHONO BRIDGE
HAS BEEN CANCELED...

WATER LEVELS ALONG THE UPPER MERCED RIVER ARE RECEDING AND THE
THREAT OF FLOODING HAS ENDED...

&&

FORECASTS ARE BASED ON PRESENT AND FORECASTED METEOROLOGICAL
AND HYDROLOGIC CONDITIONS AT TIME OF ISSUANCE.

MERCED RIVER AT
POHONO 8 PM STAGE 7.6 FT
FORECAST TO RECEDE TO NEAR 5.5 FT NEAR NOON SUNDAY
FLOOD STAGE 10.0 FT


UNLISTED FORECAST POINTS ARE EXPECTED TO REMAIN BELOW MONITOR STAGE.
ALL THOSE AFFECTED BY RIVER CONDITIONS SHOULD REMAIN ALERT FOR RAPID
CHANGES AND FOR POSSIBLE FORECAST REVISIONS.

MONITOR STAGE...INITIAL ACTION STAGE...ALONG UNLEVEED SECTIONS OF THE
RIVER...OVERBANK FLOWS MAY COVER LOW LYING LANDS AND LOCAL ROADS.
ALONG FLOOD CONTROL PROJECT LEVEES...LEVEE PATROLS MAY BECOME
MANDATORY. AT A WEIR...THE POINT AT WHICH OVERFLOW BEGINS AT THE
WEIR.

FLOOD STAGE...ALONG UNLEVEED SECTIONS OF THE RIVER...OVERBANK FLOWS
ARE OF SUFFICIENT MAGNITUDE TO CAUSE CONSIDERABLE INUNDATION OF LAND
AND ROADS...OR SIGNIFICANT HAZARD TO LIFE AND PROPERTY. ALONG FLOOD
CONTROL PROJECT LEVEES...THIS IS THE STAGE AT WHICH THE FLOW WITHIN
THE LEVEE IS AT MAXIMUM DESIGN CAPACITY.


DANGER STAGE...ALONG FLOOD CONTROL PROJECT LEVEES...FLOW IS GREATER
THEN THE MAXIMUM DESIGN CAPACITY. THIS IS GENERALLY ONE FOOT ABOVE
FLOOD STAGE.


$$
DURFEE



EDIS-12-31-05 2038 PST