Alert archive / California / Winter Storm Warnings in 2011

Winter Storm Warning 9, NWS Sacramento, CA

October 3, 2011

NWS Sacramento, CA issued this winter storm warning at Oct 3, 2011, 2:44 PM PDT. It took effect at Oct 4, 2011, 11:00 PM PDT. It was in force for 23 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Oct 3, 2011, 2:44 PM PDT (21:44 UTC)
In effect from
Oct 4, 2011, 11:00 PM PDT
Expired
Oct 5, 2011, 9:46 PM PDT
In force
23 hr
Issued by
NWS Sacramento, CA

The text

As transmitted, in the capitals the NWS used until 2016.

978 
WWUS46 KSTO 032144
WSWSTO

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SACRAMENTO CA
244 PM PDT MON OCT 3 2011

...WINTER WEATHER TO IMPACT PASSES ABOVE 6000 FEET WEDNESDAY...

.AN EARLY SEASON COLD FRONT WILL SPREAD HEAVY SNOW AND GUSTY
WINDS OVER THE HIGHER MOUNTAIN PASSES FROM EARLY WEDNESDAY MORNING
THROUGH LATE WEDNESDAY NIGHT. SCATTERED RAIN AND SNOW SHOWERS
DURING THE DAY TUESDAY WILL BECOME HEAVY AT TIMES LATE TUESDAY
NIGHT AND EARLY WEDNESDAY MORNING. SNOW LEVELS INITIALLY ABOVE
7500 FEET WILL DROP BELOW YUBA PASS...DONNER SUMMIT AND ECHO
SUMMIT BY WEDNESDAY MORNING. PERIODS OF HEAVY SNOWFALL WITH
REDUCED VISIBILITY IN WIND GUSTS UP TO 50 MPH ARE EXPECTED ABOVE
6000 FEET WEDNESDAY. SNOWFALL RATES WILL DIMINISH BY WEDNESDAY
AFTERNOON...HOWEVER HAZARDOUS WINTER-LIKE TRAVELING CONDITIONS ARE
LIKELY TO PERSIST UNTIL LATE WEDNESDAY NIGHT. PARTIAL CLEARING IS
EXPECTED OVERNIGHT WEDNESDAY NIGHT.

CAZ068-041100-
/O.UPG.KSTO.WS.A.0010.111005T0600Z-111006T0600Z/
/O.NEW.KSTO.WS.W.0009.111005T1200Z-111006T0600Z/
WESTERN PLUMAS COUNTY/LASSEN PARK-
244 PM PDT MON OCT 3 2011

...WINTER STORM WARNING IN EFFECT FROM 5 AM TO 11 PM PDT
WEDNESDAY ABOVE 6000 FEET...
...WINTER STORM WATCH NO LONGER IN EFFECT...

THE NATIONAL WEATHER SERVICE IN SACRAMENTO HAS ISSUED A WINTER
STORM WARNING ABOVE 6000 FEET FOR HEAVY SNOW AND BLOWING SNOW
...WHICH IS IN EFFECT FROM 5 AM TO 11 PM PDT WEDNESDAY. THE
WINTER STORM WATCH IS NO LONGER IN EFFECT.

* SNOW ACCUMULATIONS: UP TO A FOOT ABOVE 7000 FEET...WITH 3 TO 6
  INCHES ABOVE 6000 FEET BY WEDNESDAY EVENING.  

* ELEVATION:SNOW LEVELS NEAR 7500 FEET TUESDAY WILL LOWER TO 6000
  FEET WEDNESDAY MORNING. LOCALLY LOWER SNOW LEVELS ARE POSSIBLE
  IN HEAVIER SNOW SHOWERS WEDNESDAY AFTERNOON.

* TIMING...SCATTERED RAIN AND SNOW SHOWERS TUESDAY WILL INCREASE
  IN COVERAGE TUESDAY EVENING AND BECOME HEAVY AT TIMES BY EARLY
  WEDNESDAY MORNING. PERIODS OF HEAVY SNOW AND REDUCED VISIBILITY
  IN GUSTY WINDS ARE LIKELY WEDNESDAY MORNING AND AFTERNOON. SNOW
  WILL TAPER OFF TO SCATTERED SNOW SHOWERS LATE WEDNESDAY EVENING. 

* LOCATIONS INCLUDE: YUBA PASS...LASSEN PARK. 

* WINDS: SOUTH WINDS OF 15 TO 30 MPH ARE LIKELY WEDNESDAY.
  SOUTHWEST WIND GUSTS UP TO 50 MPH MAY OCCUR OVER THE PASSES AND
  RIDGES.  

* IMPACTS: HAZARDOUS TRAVELING CONDITIONS IN HEAVY SNOW.
  VISIBILITY UNDER ONE-QUARTER MILE IN BLOWING SNOW. ICY ROADS.
  CHAIN CONTROLS AND TRAVEL DELAYS ARE LIKELY. DANGEROUS BACK
  COUNTRY CONDITIONS AND COLD TEMPERATURES FOR HIKERS AND CAMPERS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED OR OCCURRING.  SIGNIFICANT AMOUNTS OF
SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN
AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...
FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

&&

$$

CAZ069-041100-
/O.UPG.KSTO.WS.A.0010.111005T0600Z-111006T0600Z/
/O.NEW.KSTO.WS.W.0009.111005T1200Z-111006T0600Z/
WEST SLOPE NORTHERN SIERRA NEVADA-
244 PM PDT MON OCT 3 2011

...WINTER STORM WARNING IN EFFECT FROM 5 AM TO 11 PM PDT
WEDNESDAY ABOVE 6000 FEET...
...WINTER STORM WATCH NO LONGER IN EFFECT...

THE NATIONAL WEATHER SERVICE IN SACRAMENTO HAS ISSUED A WINTER
STORM WARNING ABOVE 6000 FEET FOR HEAVY SNOW AND BLOWING SNOW...WHICH
IS IN EFFECT FROM 5 AM TO 11 PM PDT WEDNESDAY. THE WINTER STORM
WATCH IS NO LONGER IN EFFECT.

* SNOW ACCUMULATIONS: UP TO A FOOT ABOVE 7000 FEET...WITH 3 TO 6
  INCHES ABOVE 6000 FEET BY WEDNESDAY EVENING.  

* ELEVATION:SNOW LEVELS INITIALLY ABOVE 7500 FEET TUESDAY WILL
  DROP TO 6000 FEET WEDNESDAY MORNING. LOCALLY LOWER SNOW LEVELS
  ARE POSSIBLE IN HEAVIER SNOW SHOWERS WEDNESDAY AFTERNOON. 

* TIMING:SCATTERED RAIN AND SNOW SHOWERS TUESDAY WILL INCREASE
  IN COVERAGE TUESDAY EVENING AND BECOME HEAVY AT TIMES BY EARLY
  WEDNESDAY MORNING. PERIODS OF HEAVY SNOW AND REDUCED VISIBILITY
  IN GUSTY WINDS ARE LIKELY WEDNESDAY MORNING AND AFTERNOON. SNOW
  WILL TAPER OFF TO SCATTERED SNOW SHOWERS LATE WEDNESDAY EVENING. 

* LOCATIONS INCLUDE: INTERSTATE 80 ABOVE KINGVALE. HIGHWAY 50
  ABOVE STRAWBERRY. EBBETS PASS ALONG HIGHWAY 4 AND CARSON PASS
  ALONG HIGHWAY 88. SONORA PASS. 

* WINDS: SOUTH WINDS OF 15 TO 30 MPH ARE LIKELY WEDNESDAY.
  SOUTHWEST WIND GUSTS UP TO 50 MPH MAY OCCUR OVER THE PASSES AND
  RIDGES.  

* IMPACTS: HAZARDOUS TRAVELING CONDITIONS IN HEAVY SNOW.
  VISIBILITY UNDER ONE-QUARTER MILE IN BLOWING SNOW. ICY ROADS.
  CHAIN CONTROLS AND TRAVEL DELAYS ARE LIKELY. DANGEROUS BACK
  COUNTRY CONDITIONS AND COLD TEMPERATURES FOR HIKERS AND CAMPERS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED OR OCCURRING.  SIGNIFICANT AMOUNTS OF
SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN
AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...
FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

&&

$$
6 follow-up statements
498 
WWUS46 KSTO 041049
WSWSTO

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SACRAMENTO CA
349 AM PDT TUE OCT 4 2011

...EARLY SEASON WINTER STORM TO IMPACT HIGHER ELEVATIONS...

.A PACIFIC COLD FRONTAL SYSTEM MORE LIKE THAT SEEN IN EARLY
DECEMBER THAN EARLY OCTOBER WILL SPREAD HEAVY SNOW AND GUSTY
WINDS OVER THE HIGHER MOUNTAIN PASSES WEDNESDAY. SCATTERED LIGHT RAIN
AND SNOW SHOWERS DURING THE DAY TODAY WILL BECOME HEAVY AT TIMES
LATE TONIGHT OR EARLY WEDNESDAY MORNING. SNOW LEVELS INITIALLY
ABOVE 7500 FEET WILL DROP BELOW DONNER SUMMIT ON INTERSTATE 80 AND
ECHO SUMMIT ON U.S HIGHWAY 50 BY WEDNESDAY MORNING. PERIODS OF
HEAVY SNOWFALL WITH REDUCED VISIBILITY IN WIND GUSTS UP TO 50 MPH
ARE EXPECTED ABOVE 6000 FEET WEDNESDAY. SNOWFALL RATES WILL
DIMINISH BY WEDNESDAY AFTERNOON...HOWEVER HAZARDOUS WINTER-LIKE
TRAVELING CONDITIONS ARE LIKELY TO PERSIST UNTIL LATE WEDNESDAY
EVENING. PARTIAL CLEARING IS EXPECTED BY THURSDAY MORNING. 

CAZ068-042330-
/O.CON.KSTO.WS.W.0009.111005T1200Z-111006T0600Z/
WESTERN PLUMAS COUNTY/LASSEN PARK-
349 AM PDT TUE OCT 4 2011

...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 AM TO 11 PM PDT
WEDNESDAY ABOVE 6000 FEET...

A WINTER STORM WARNING ABOVE 6000 FEET REMAINS IN EFFECT FROM
5 AM TO 11 PM PDT WEDNESDAY FOR WESTERN PLUMAS COUNTY AND LASSEN
PARK.

* SNOW ACCUMULATIONS: A FOOT OR MORE ABOVE 7000 FEET...WITH 3 TO
  6 INCHES ABOVE 6000 FEET BY WEDNESDAY EVENING.

* ELEVATION:SNOW LEVELS NEAR 7500 FEET TUESDAY WILL LOWER TO 6000
  FEET WEDNESDAY MORNING. LOCALLY LOWER SNOW LEVELS ARE POSSIBLE
  IN HEAVIER SNOW SHOWERS WEDNESDAY AFTERNOON. LIGHTER SNOW DOWN
  TO 5000 FEET WILL BE POSSIBLE WEDNESDAY EVENING AND NIGHT.

* TIMING...SCATTERED RAIN AND SNOW SHOWERS TODAY WILL INCREASE IN
  COVERAGE THIS EVENING AND BECOME HEAVY AT TIMES BY EARLY
  WEDNESDAY MORNING. PERIODS OF HEAVY SNOW AND REDUCED VISIBILITY
  IN GUSTY WINDS ARE LIKELY WEDNESDAY MORNING AND AFTERNOON. SNOW
  WILL TAPER OFF TO SCATTERED SNOW SHOWERS LATE WEDNESDAY NIGHT.

* LOCATIONS INCLUDE: LASSEN PARK AND ELEVATIONS ABOVE 6000 FEET.

* WINDS: SOUTH WINDS OF 15 TO 30 MPH ARE LIKELY WEDNESDAY. 
  SOUTHWEST WIND GUSTS UP TO 50 MPH MAY OCCUR OVER THE PASSES 
  AND RIDGES.

* IMPACTS: HAZARDOUS TRAVELING CONDITIONS IN HEAVY SNOW. 
  VISIBILITY UNDER ONE-QUARTER MILE IN BLOWING SNOW. ICY 
  ROADS. CHAIN CONTROLS AND TRAVEL DELAYS ARE LIKELY. 
  DANGEROUS BACK COUNTRY CONDITIONS AND COLD TEMPERATURES FOR 
  HIKERS AND CAMPERS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED OR OCCURRING.  SIGNIFICANT AMOUNTS OF
SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN
AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...
FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

&&

$$

CAZ069-042330-
/O.CON.KSTO.WS.W.0009.111005T1200Z-111006T0600Z/
WEST SLOPE NORTHERN SIERRA NEVADA-
349 AM PDT TUE OCT 4 2011

...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 AM TO 11 PM PDT
WEDNESDAY ABOVE 6000 FEET...

A WINTER STORM WARNING ABOVE 6000 FEET REMAINS IN EFFECT FROM
5 AM TO 11 PM PDT WEDNESDAY FOR THE WEST SLOPE OF THE NORTHERN
SIERRA NEVADA.

* SNOW ACCUMULATIONS: UP TO A FOOT ABOVE 7000 FEET...WITH 3 TO 6 
  INCHES ABOVE 6000 FEET BY WEDNESDAY EVENING. 

* ELEVATION:SNOW LEVELS INITIALLY ABOVE 7500 FEET TODAY WILL DROP
  TO 6000 FEET WEDNESDAY MORNING. LOCALLY LOWER SNOW LEVELS ARE
  POSSIBLE IN HEAVIER SNOW SHOWERS WEDNESDAY AFTERNOON. LIGHTER
  SNOWFALL DOWN TO 5500 FEET WILL BE POSSIBLE LATE WEDNESDAY NIGHT.

* TIMING:SCATTERED RAIN AND SNOW SHOWERS TODAY WILL INCREASE IN
  COVERAGE THIS EVENING AND BECOME HEAVY AT TIMES BY EARLY WEDNESDAY
  MORNING. PERIODS OF HEAVY SNOW AND REDUCED VISIBILITY IN GUSTY
  WINDS ARE LIKELY WEDNESDAY MORNING AND AFTERNOON. SNOW WILL
  TAPER OFF TO SCATTERED SNOW SHOWERS LATE WEDNESDAY EVENING.

* LOCATIONS INCLUDE: INTERSTATE 80 ABOVE KINGVALE. HIGHWAY 50
  ABOVE STRAWBERRY. EBBETS PASS ALONG HIGHWAY 4 AND CARSON PASS
  ALONG HIGHWAY 88. SONORA PASS ON STATE ROUTE 108.

* WINDS: SOUTH WINDS OF 15 TO 30 MPH ARE LIKELY WEDNESDAY. 
  SOUTHWEST WIND GUSTS UP TO 50 MPH MAY OCCUR OVER THE PASSES 
  AND RIDGES.

* IMPACTS: HAZARDOUS TRAVELING CONDITIONS IN HEAVY SNOW. 
  VISIBILITY UNDER ONE-QUARTER MILE IN BLOWING SNOW. ICY 
  ROADS. CHAIN CONTROLS AND TRAVEL DELAYS ARE LIKELY. 
  DANGEROUS BACK COUNTRY CONDITIONS AND COLD TEMPERATURES FOR 
  HIKERS AND CAMPERS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED OR OCCURRING.  SIGNIFICANT AMOUNTS OF
SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN
AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...
FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

&&

$$
349 
WWUS46 KSTO 042154
WSWSTO

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SACRAMENTO CA
254 PM PDT TUE OCT 4 2011

...EARLY SEASON WINTER STORM TO IMPACT HIGHER ELEVATIONS...

.RAIN AND HIGH ELEVATION SNOW WILL INCREASE THROUGH THE EVENING
AND BECOME HEAVY AT TIMES LATER TONIGHT. SNOW LEVELS WILL DROP
TO 6000 FEET BY WEDNESDAY MORNING...AND LOWER FURTHER TO 5000
FEET BY LATE AFTERNOON. SOUTHWEST WIND GUSTS UP TO 60 MPH WILL
COMBINE WITH PERIODS OF HEAVY SNOW TO CREATE HAZARDOUS TRAVELING
CONDITIONS OVER THE MOUNTAIN PASSES LATE TONIGHT AND WEDNESDAY.
SNOW WILL TAPER OFF TO SCATTERED SNOW SHOWERS BY WEDNESDAY
AFTERNOON. HAZARDOUS WINTER-LIKE TRAVELING CONDITIONS ARE LIKELY
TO PERSIST UNTIL WEDNESDAY NIGHT. PARTIAL CLEARING IS EXPECTED BY
THURSDAY MORNING.

CAZ068-051100-
/O.EXT.KSTO.WS.W.0009.111005T0600Z-111006T0600Z/
WESTERN PLUMAS COUNTY/LASSEN PARK-
254 PM PDT TUE OCT 4 2011

...WINTER STORM WARNING NOW IN EFFECT FROM 11 PM THIS EVENING TO
11 PM PDT WEDNESDAY ABOVE 6000 FEET...

THE WINTER STORM WARNING ABOVE 6000 FEET IS NOW IN EFFECT FROM
11 PM THIS EVENING TO 11 PM PDT WEDNESDAY. 

* SNOW ACCUMULATIONS: A FOOT OR MORE ABOVE 7000 FEET...WITH 4 TO 8
  INCHES ABOVE 6000 FEET BY WEDNESDAY EVENING. A FEW INCHES OF
  SNOW MAY FALL DOWN TO 5000 FEET LATE WEDNESDAY AFTERNOON.

* ELEVATION: ABOVE 6000 FEET. A FEW INCHES OF SNOW MAY FALL DOWN
  TO 5000 FEET LATE WEDNESDAY AFTERNOON.

* TIMING...SCATTERED RAIN AND SNOW SHOWERS WILL BECOME WIDESPREAD
  THIS EVENING. SNOW WILL BECOME HEAVY AT TIMES LATE TONIGHT ABOVE
  6000 FEET. SNOW WILL TAPER OFF TO SCATTERED SNOW SHOWERS
  WEDNESDAY AFTERNOON AS SNOW LEVELS LOWER TO 5000 FEET. LIGHT
  SNOW MAY CONTINUE INTO WEDNESDAY NIGHT BEFORE PARTIAL CLEARING
  DEVELOPS EARLY THURSDAY MORNING. 

* LOCATIONS INCLUDE: YUBA PASS...LASSEN PARK...AND ALL AREAS ABOVE
  6000 FEET.  

* WINDS: SOUTH WINDS OF 15 TO 30 MPH TONIGHT AND EARLY WEDNESDAY.
  SOUTHWEST WIND GUSTS OF 60 MPH ARE POSSIBLE OVER RIDGES AND
  PASSES.

* IMPACTS: HAZARDOUS TRAVELING CONDITIONS IN HEAVY SNOW.
  VISIBILITY UNDER ONE-QUARTER MILE IN BLOWING SNOW. ICY ROADS.
  CHAIN CONTROLS AND TRAVEL DELAYS ARE LIKELY. DANGEROUS BACK
  COUNTRY CONDITIONS AND COLD TEMPERATURES FOR HIKERS AND CAMPERS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW AND BLOWING SNOW MEANS
SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING.
SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL
DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...
FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

&&

$$

CAZ069-051100-
/O.EXT.KSTO.WS.W.0009.111005T0600Z-111006T0600Z/
WEST SLOPE NORTHERN SIERRA NEVADA-
254 PM PDT TUE OCT 4 2011

...WINTER STORM WARNING NOW IN EFFECT FROM 11 PM THIS EVENING TO
11 PM PDT WEDNESDAY ABOVE 6000 FEET...

THE WINTER STORM WARNING ABOVE 6000 FEET IS NOW IN EFFECT FROM
11 PM THIS EVENING TO 11 PM PDT WEDNESDAY. 

* SNOW ACCUMULATIONS: A FOOT OR MORE ABOVE 7000 FEET...WITH 4 TO 8
  INCHES ABOVE 6000 FEET BY WEDNESDAY EVENING. A FEW INCHES OF
  SNOW MAY FALL DOWN TO 5000 FEET LATE WEDNESDAY AFTERNOON.

* ELEVATION: ABOVE 6000 FEET. A FEW INCHES OF SNOW MAY FALL DOWN
  TO 5000 FEET LATE WEDNESDAY AFTERNOON.

* TIMING:SCATTERED RAIN AND SNOW SHOWERS WILL BECOME WIDESPREAD
  THIS EVENING. SNOW WILL BECOME HEAVY AT TIMES LATE TONIGHT ABOVE
  6000 FEET. SNOW WILL TAPER OFF TO SCATTERED SNOW SHOWERS
  WEDNESDAY AFTERNOON AS SNOW LEVELS LOWER TO 5000 FEET. LIGHT
  SNOW MAY CONTINUE INTO WEDNESDAY NIGHT BEFORE PARTIAL CLEARING
  DEVELOPS EARLY THURSDAY MORNING.

* LOCATIONS INCLUDE: INTERSTATE 80 ABOVE KINGVALE. HIGHWAY 50
  ABOVE STRAWBERRY. EBBETS PASS ALONG HIGHWAY 4 AND CARSON PASS
  ALONG HIGHWAY 88. SONORA PASS ON HIGHWAY 108.

* WINDS: SOUTH WINDS OF 15 TO 30 MPH TONIGHT AND EARLY
  WEDNESDAY...WITH SOUTHWEST WIND GUSTS UP TO 60 MPH OVER RIDGES
  AND PASSES. 

* IMPACTS: HAZARDOUS TRAVELING CONDITIONS IN HEAVY SNOW. 
  VISIBILITY UNDER ONE-QUARTER MILE IN BLOWING SNOW. ICY 
  ROADS. CHAIN CONTROLS AND TRAVEL DELAYS ARE LIKELY. 
  DANGEROUS BACK COUNTRY CONDITIONS AND COLD TEMPERATURES FOR 
  HIKERS AND CAMPERS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW AND BLOWING SNOW MEANS
SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING.
SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL
DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...
FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

&&

$$

SG/HSO
690 
WWUS46 KSTO 051045
WSWSTO

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SACRAMENTO CA
345 AM PDT WED OCT 5 2011

...EARLY SEASON WINTER STORM BRINGING HIGH ELEVATION SNOW AND
GUSTY WINDS TO THE SIERRA CASCADE RANGE...

.RAIN AND HIGH ELEVATION SNOW BEGAN FALLING OVERNIGHT AND WILL
CONTINUE THROUGH THE MORNING HOURS. SNOW LEVELS THIS MORNING WILL
RANGE FROM AROUND 6000 FEET IN THE LASSEN AREA TO AROUND 7000
FEET SOUTH OF U.S. 50. SNOW LEVELS WILL THEN LOWER THIS AFTERNOON
TO AROUND 5000 TO 5500 FEET. SOUTHWEST WIND GUSTS UP TO 60 MPH
WILL COMBINE WITH PERIODS OF HEAVY SNOW THIS MORNING TO CREATE
HAZARDOUS TRAVELING CONDITIONS OVER THE MOUNTAIN PASSES. SNOW WILL
TAPER OFF TO SCATTERED SNOW SHOWERS BY THIS AFTERNOON BUT SOME
ADDITIONAL SNOWFALL ACCUMULATION IS POSSIBLE. HAZARDOUS WINTER-
LIKE TRAVELING CONDITIONS ARE LIKELY TO PERSIST UNTIL THIS
EVENING. PARTIAL CLEARING IS EXPECTED BY THURSDAY MORNING.

CAZ068-060000-
/O.CON.KSTO.WS.W.0009.000000T0000Z-111006T0600Z/
WESTERN PLUMAS COUNTY/LASSEN PARK-
345 AM PDT WED OCT 5 2011

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS
EVENING ABOVE 6000 FEET...

A WINTER STORM WARNING ABOVE 6000 FEET REMAINS IN EFFECT UNTIL
11 PM PDT THIS EVENING FOR WESTERN PLUMAS COUNTY AND LASSEN PARK.

* SNOW ACCUMULATIONS: 4 TO 8 INCHES OF ADDITIONAL SNOW ABOVE 6000
  FEET BY THIS EVENING. A FEW INCHES OF SNOW MAY FALL DOWN TO 5000
  FEET LATE THIS AFTERNOON.

* ELEVATION: ABOVE 6000 FEET.

* TIMING...SNOW...HEAVY AT TIMES WILL CONTINUE THROUGH THE MORNING
  HOURS ABOVE 6000 FEET. SNOW WILL TAPER OFF TO SCATTERED SNOW
  SHOWERS THIS AFTERNOON AS SNOW LEVELS LOWER TO 5000 FEET. LIGHT
  SNOW MAY CONTINUE INTO TONIGHT BEFORE PARTIAL CLEARING DEVELOPS
  EARLY THURSDAY MORNING.

* LOCATIONS INCLUDE: LASSEN PARK AND ALL AREAS ABOVE 6000 FEET.

* WINDS: SOUTH WINDS OF 15 TO 30 MPH THIS MORNING WITH GUSTS TO 60
  MPH ARE POSSIBLE OVER RIDGES AND PASSES.

* IMPACTS: HAZARDOUS TRAVELING CONDITIONS IN HEAVY SNOW. 
  VISIBILITY UNDER ONE-QUARTER MILE IN BLOWING SNOW. ICY 
  ROADS. CHAIN CONTROLS AND TRAVEL DELAYS ARE LIKELY. 
  DANGEROUS BACK COUNTRY CONDITIONS AND COLD TEMPERATURES FOR 
  HIKERS AND CAMPERS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW AND BLOWING SNOW MEANS
SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING.
SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL
DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...
FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

&&

$$

CAZ069-060000-
/O.CON.KSTO.WS.W.0009.000000T0000Z-111006T0600Z/
WEST SLOPE NORTHERN SIERRA NEVADA-
345 AM PDT WED OCT 5 2011

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS
EVENING ABOVE 6000 FEET...

A WINTER STORM WARNING ABOVE 6000 FEET REMAINS IN EFFECT UNTIL
11 PM PDT THIS EVENING FOR THE WEST SLOPE OF THE NORTHERN SIERRA
NEVADA.

* SNOW ACCUMULATIONS: 4 TO 8 INCHES OF ADDITIONAL SNOW ABOVE 6000
  FEET BY THIS EVENING. A FEW INCHES OF SNOW MAY FALL DOWN TO 5000
  FEET LATE THIS AFTERNOON.

* ELEVATION: ABOVE 6000 FEET.

* TIMING: SNOW...HEAVY AT TIMES WILL CONTINUE THROUGH THE MORNING
  HOURS ABOVE 6000 TO 7000 FEET. SNOW WILL TAPER OFF TO SCATTERED
  SNOW SHOWERS THIS AFTERNOON AS SNOW LEVELS LOWER TO 5500 FEET.
  LIGHT SNOW MAY CONTINUE INTO TONIGHT BEFORE PARTIAL CLEARING
  DEVELOPS EARLY THURSDAY MORNING.

* LOCATIONS INCLUDE: INTERSTATE 80 ABOVE KINGVALE. HIGHWAY 50
  ABOVE STRAWBERRY. EBBETS PASS ALONG HIGHWAY 4 AND CARSON PASS
  ALONG HIGHWAY 88. SONORA PASS ON HIGHWAY 108.

* WINDS: SOUTH WINDS OF 15 TO 30 MPH THIS MORNING WITH SOUTHWEST
  WIND GUSTS UP TO 60 MPH OVER RIDGES AND PASSES.

* IMPACTS: HAZARDOUS TRAVELING CONDITIONS IN HEAVY SNOW. 
  VISIBILITY UNDER ONE-QUARTER MILE IN BLOWING SNOW. ICY 
  ROADS. CHAIN CONTROLS AND TRAVEL DELAYS ARE LIKELY. 
  DANGEROUS BACK COUNTRY CONDITIONS AND COLD TEMPERATURES FOR 
  HIKERS AND CAMPERS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW AND BLOWING SNOW MEANS
SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING.
SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL
DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...
FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

&&

$$
416 
WWUS46 KSTO 051604
WSWSTO

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SACRAMENTO CA
904 AM PDT WED OCT 5 2011

...EARLY SEASON WINTER STORM BRINGING HIGH ELEVATION SNOW AND
GUSTY WINDS TO THE SIERRA CASCADE RANGE...

.NUMEROUS RAIN AND HIGH ELEVATION SNOW SHOWERS WILL CONTINUE
THROUGH THE AFTERNOON HOURS WITH ADDITIONAL ACCUMULATIONS
POSSIBLE. SOUTHWEST WIND GUSTS UP TO 50 MPH WILL COMBINE WITH
PERIODS OF HEAVY SNOW TODAY TO CREATE HAZARDOUS TRAVELING
CONDITIONS OVER THE MOUNTAIN PASSES.SNOW LEVELS WHICH ARE
CURRENTLY NEAR 6000 FEET WILL LOWER THIS AFTERNOON TO AROUND 5000
TO 5500 FEET. HAZARDOUS WINTER-LIKE TRAVELING CONDITIONS ARE
LIKELY TO PERSIST UNTIL THIS EVENING...WITH PARTIAL CLEARING
EXPECTED BY THURSDAY MORNING.

CAZ068-060015-
/O.CON.KSTO.WS.W.0009.000000T0000Z-111006T0600Z/
WESTERN PLUMAS COUNTY/LASSEN PARK-
INCLUDING THE CITIES OF...CHESTER...QUINCY
904 AM PDT WED OCT 5 2011

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS
EVENING...

* SNOW ACCUMULATIONS: 3 TO 6 INCHES OF ADDITIONAL SNOW ABOVE 6000
  FEET BY THIS EVENING. A FEW INCHES OF SNOW MAY FALL DOWN TO 5000
  FEET LATE THIS AFTERNOON.

* ELEVATION: ABOVE 6000 FEET. A COUPLE INCHES OF SLUSHY SNOW MAY FALL
  DOWN TO 5000 FEET TODAY.

* TIMING...SNOW SHOWERS...HEAVY AT TIMES WILL CONTINUE THROUGH
  THE DAY ABOVE 6000 FEET. SNOW WILL TAPER OFF TO SCATTERED SNOW
  SHOWERS THIS AFTERNOON AS SNOW LEVELS LOWER TO 5000 FEET. LIGHT
  SNOW MAY CONTINUE INTO TONIGHT BEFORE PARTIAL CLEARING DEVELOPS
  EARLY THURSDAY MORNING.

* LOCATIONS INCLUDE: LASSEN PARK AND ALL AREAS ABOVE 6000 FEET.

* WINDS: SOUTH WINDS OF 15 TO 30 MPH THIS MORNING WITH GUSTS TO 
  60 MPH ARE POSSIBLE OVER RIDGES AND PASSES. 

* IMPACTS: HAZARDOUS TRAVELING CONDITIONS IN HEAVY SNOW. 
  VISIBILITY UNDER ONE-QUARTER MILE IN BLOWING SNOW. ICY ROADS. 
  CHAIN CONTROLS AND TRAVEL DELAYS ARE LIKELY. DANGEROUS BACK 
  COUNTRY CONDITIONS AND COLD TEMPERATURES FOR HIKERS AND 
  CAMPERS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW AND BLOWING SNOW MEANS
SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING.
SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL
DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...
FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

&&

$$

CAZ069-060015-
/O.CON.KSTO.WS.W.0009.000000T0000Z-111006T0600Z/
WEST SLOPE NORTHERN SIERRA NEVADA-
INCLUDING THE CITY OF...BLUE CANYON
904 AM PDT WED OCT 5 2011

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS
EVENING...

* SNOW ACCUMULATIONS: 3 TO 6 INCHES OF ADDITIONAL SNOW ABOVE 6000
  FEET BY THIS EVENING. A FEW INCHES OF SNOW MAY FALL DOWN TO 5000
  FEET LATE THIS AFTERNOON.

* ELEVATION: ABOVE 6000 FEET. A COUPLE INCHES OF SLUSHY SNOW MAY
  FALL DOWN TO 5000 FEET TODAY. 

* TIMING...SNOW SHOWERS...HEAVY AT TIMES WILL CONTINUE THROUGH
  THE DAY ABOVE 6000 FEET. SNOW WILL TAPER OFF TO SCATTERED SNOW
  SHOWERS THIS AFTERNOON AS SNOW LEVELS LOWER TO 5000 FEET. LIGHT
  SNOW MAY CONTINUE INTO TONIGHT BEFORE PARTIAL CLEARING DEVELOPS
  EARLY THURSDAY MORNING.

* LOCATIONS INCLUDE: INTERSTATE 80 ABOVE KINGVALE. HIGHWAY 50 
  ABOVE STRAWBERRY. EBBETS PASS ALONG HIGHWAY 4 AND CARSON PASS 
  ALONG HIGHWAY 88. SONORA PASS ON HIGHWAY 108. 

* WINDS: SOUTH WINDS OF 15 TO 30 MPH THIS MORNING WITH SOUTHWEST 
  WIND GUSTS UP TO 60 MPH OVER RIDGES AND PASSES. 

* IMPACTS: HAZARDOUS TRAVELING CONDITIONS IN HEAVY SNOW. 
  VISIBILITY UNDER ONE-QUARTER MILE IN BLOWING SNOW. ICY ROADS. 
  CHAIN CONTROLS AND TRAVEL DELAYS ARE LIKELY. DANGEROUS BACK 
  COUNTRY CONDITIONS AND COLD TEMPERATURES FOR HIKERS AND 
  CAMPERS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW AND BLOWING SNOW MEANS
SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING.
SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL
DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...
FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

&&

$$
280 
WWUS46 KSTO 052208
WSWSTO

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SACRAMENTO CA
308 PM PDT WED OCT 5 2011

...EARLY SEASON WINTER STORM BRINGING HIGH ELEVATION SNOW AND
GUSTY WINDS TO THE SIERRA CASCADE RANGE...

.NUMEROUS RAIN AND HIGH ELEVATION SNOW SHOWERS WILL CONTINUE
THROUGH THE EVENING HOURS WITH ADDITIONAL ACCUMULATIONS
POSSIBLE. SOUTHWEST WIND GUSTS UP TO 50 MPH WILL COMBINE WITH
PERIODS OF HEAVY SNOW TODAY TO CREATE HAZARDOUS TRAVELING
CONDITIONS OVER THE MOUNTAIN PASSES. SNOW LEVELS WHICH ARE
CURRENTLY NEAR 6000 FEET WILL CONTINUE TO LOWER TO AROUND 5000
FEET OR LOWER OVERNIGHT. HAZARDOUS WINTER-LIKE TRAVELING
CONDITIONS ARE LIKELY TO PERSIST THROUGH THIS EVENING...WITH PARTIAL
CLEARING EXPECTED BY THURSDAY MORNING.

CAZ068-060600-
/O.CON.KSTO.WS.W.0009.000000T0000Z-111006T0600Z/
WESTERN PLUMAS COUNTY/LASSEN PARK-
308 PM PDT WED OCT 5 2011

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS
EVENING ABOVE 6000 FEET...

A WINTER STORM WARNING ABOVE 6000 FEET REMAINS IN EFFECT UNTIL
11 PM PDT THIS EVENING. 

* ELEVATION: ABOVE 6000 FEET. A COUPLE INCHES OF SLUSHY SNOW MAY 
  FALL DOWN TO 5000 FEET THROUGH TONIGHT. 

* TIMING...SNOW SHOWERS...HEAVY AT TIMES WILL CONTINUE THROUGH THE
  EVENING ABOVE 6000 FEET. LIGHT SNOW MAY CONTINUE INTO TONIGHT
  BEFORE PARTIAL CLEARING DEVELOPS EARLY THURSDAY MORNING.

* LOCATIONS INCLUDE: LASSEN PARK AND ALL AREAS ABOVE 6000 FEET.

* WINDS: SOUTH WINDS OF 15 TO 30 MPH ARE POSSIBLE OVER RIDGES AND
  PASSES.

* IMPACTS: HAZARDOUS TRAVELING CONDITIONS IN HEAVY SNOW. 
  VISIBILITY UNDER ONE-QUARTER MILE IN BLOWING SNOW. ICY 
  ROADS. CHAIN CONTROLS AND TRAVEL DELAYS ARE LIKELY. 
  DANGEROUS BACK COUNTRY CONDITIONS AND COLD TEMPERATURES FOR 
  HIKERS AND CAMPERS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW AND BLOWING SNOW MEANS
SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING.
SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL
DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...
FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

&&

$$

CAZ069-060600-
/O.CON.KSTO.WS.W.0009.000000T0000Z-111006T0600Z/
WEST SLOPE NORTHERN SIERRA NEVADA-
308 PM PDT WED OCT 5 2011

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS
EVENING ABOVE 6000 FEET...

A WINTER STORM WARNING ABOVE 6000 FEET REMAINS IN EFFECT UNTIL
11 PM PDT THIS EVENING. 

* ELEVATION: ABOVE 6000 FEET. A COUPLE INCHES OF SLUSHY SNOW MAY 
  FALL DOWN TO 5000 FEET TODAY. 

* TIMING...SNOW SHOWERS...HEAVY AT TIMES WILL CONTINUE THROUGH THE
  EVENING ABOVE 6000 FEET. LIGHT SNOW MAY CONTINUE INTO TONIGHT
  BEFORE PARTIAL CLEARING DEVELOPS EARLY THURSDAY MORNING.

* LOCATIONS INCLUDE: INTERSTATE 80 ABOVE KINGVALE. HIGHWAY 50 
  ABOVE STRAWBERRY. EBBETS PASS ALONG HIGHWAY 4 AND CARSON 
  PASS ALONG HIGHWAY 88. SONORA PASS ON HIGHWAY 108.

* WINDS: SOUTH WINDS OF 15 TO 30 MPH ARE POSSIBLE OVER RIDGES AND
  PASSES.

* IMPACTS: HAZARDOUS TRAVELING CONDITIONS IN HEAVY SNOW. 
  VISIBILITY UNDER ONE-QUARTER MILE IN BLOWING SNOW. ICY 
  ROADS. CHAIN CONTROLS AND TRAVEL DELAYS ARE LIKELY. 
  DANGEROUS BACK COUNTRY CONDITIONS AND COLD TEMPERATURES FOR 
  HIKERS AND CAMPERS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW AND BLOWING SNOW MEANS
SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING.
SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL
DANGEROUS. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...
FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

&&

$$
907 
WWUS46 KSTO 060446
WSWSTO

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE SACRAMENTO CA
946 PM PDT WED OCT 5 2011


CAZ068-069-060600-
/O.CAN.KSTO.WS.W.0009.000000T0000Z-111006T0600Z/
WESTERN PLUMAS COUNTY/LASSEN PARK-
WEST SLOPE NORTHERN SIERRA NEVADA-
INCLUDING THE CITIES OF...CHESTER...QUINCY...BLUE CANYON
946 PM PDT WED OCT 5 2011

...WINTER STORM WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN SACRAMENTO HAS CANCELLED THE
WINTER STORM WARNING. SCATTERED LIGHT SNOW SHOWERS WILL CONTINUE
OVERNIGHT BUT LITTLE TO NO ADDITIONAL ACCUMULATIONS EXPECTED. 

$$

What forecasters said that day

The local office's own words before this winter storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Sacramento, CA wrote its last area forecast discussion before this winter storm warning went out at Oct 3, 8:54 AM PDT, 5 hours 50 minutes earlier.

Area forecast discussion, Oct 3, 8:54 AM PDT, 5 hours 50 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
854 AM PDT MON OCT 3 2011

.SHORT TERM DISCUSSION...
WV IMAGERY THIS MORNING DEPICTS A HIGH-AMPLITUDE TROUGH DIGGING
OFFSHORE OF THE WEST COAST...STRETCHING FROM A CIRCULATION CENTER
NEAR VANCOUVER ISLAND BC SOUTHWARD TO OFFSHORE FROM SANTA BARBARA
CA. THE EASTWARD PROGRESSION OF THIS FEATURE HAS SLOWED IN THE
LAST COUPLE OF HOURS AND IT APPEARS MORE ENERGY IS GOING TOWARDS
DEEPENING THE TROUGH RATHER THAN PROGRESSING IT. AN AMPLE MOISTURE
TAP IS ASSOCIATED WITH THE JET ROUNDING THE BASE OF THE TROUGH AS
RECENT AMSU/SSMI BLENDED TOTAL PWAT SHOWS 1-1.5 INCHES OF LIQUID
AVAILABLE AND MOVING ONSHORE NORTH OF THE BAY AREA.

CLOSER TO THE SURFACE...AREA RADARS SHOW A WELL-DEFINED LEADING
BAND OF MODERATE PRECIP ALONG A SW-NE LINE EXTENDING JUST EAST OF
THE MENDOCINO MTNS WITH VERY LITTLE WEST-EAST PROPAGATION. THIS
MATCHES WELL WITH LATEST HIGH-RES MODEL GUIDANCE WHICH HAS PRECIP
HOLDING TO THE WESTERN PORTIONS OF THE FORECAST AREA UNTIL LATE IN
THE DAY WHEN THE FRONT FINALLY PUSHES EASTWARD AND THE BAND MOVES
ACROSS THE VALLEY AND INTO THE SIERRA. IN FACT...THE 06Z LOCAL WRF
MODEL DOES NOT HAVE ANY RAIN OVER THE SAC METRO AREA UNTIL
MIDNIGHT OR LATER...ALTHOUGH IT IS A LITTLE BEHIND WITH THE
CURRENT LOCATION OF THE BAND.

MINOR UPDATE TO THE FORECAST THIS MORNING TO FACTOR IN LATEST
MODEL TIMING OF THE FRONT FOR POPS AND WX. OTHERWISE...PREVIOUS
FORECAST LOOKS GOOD. SEE THE PREVIOUS DISCUSSION BELOW FOR AN
EXCELLENT ANALYSIS OF THE SITUATION OVER THE NEXT FEW DAYS. -DVC

.PREVIOUS DISCUSSION...ISSUED 435 AM PDT...

SYSTEM #1 IS EXPECTED TO IMPACT NORCAL TODAY AND TONIGHT...WITH
NORCAL IN BETWEEN WX SYSTEMS ON TUE...THEN STRONGER/WETTER SYSTEM
#2 IMPACTS THE AREA TUE NITE...WED AND INTO THU.

THE 145 KT JET DIGGING ON THE BACKSIDE OF THE ERN PAC TROF IS
SHARPENING/DIGGING THE UPPER LEVEL TROF AND SLOWING THE EWD
PROGRESSION OF THE FRONTAL BAND ALONG THE N COAST. THE BACKING FLOW
E OF THE TROF AXIS IS PARALLELING THE FRONT...AND THE UPPER JET
WON'T SHIFT EWD ENOUGH UNTIL THIS AFTERNOON AND TONITE TO PUSH THE
FRONTAL BAND ONSHORE. THE LOCAL HIGH RESOLUTION WRF_NMM AND BUFKIT
QPFS GENERALLY HAVE THE LEADING EDGE OF THE RAIN MOVING TO A LINE
FROM REDDING TO STONEYFORD TO PETALUMA LINE BY AROUND 1 PM. THERE
MAY BE ENOUGH OROGRAPHICS AND ISENTROPIC LIFTING PROCESSES TO
SQUEEZE OUT SOME DROPS OVER THE NRN SIERNEV AHEAD OF THE FRONTAL
BAND THIS AFTERNOON...BUT OTHERWISE THE FRONTAL PRECIP WILL HOLD OFF
UNTIL THIS EVENING FOR THE SIERNEV AND SRN SAC VLY/NRN SAN JOAQUIN
VALLEY ZONES. THE 03/06Z WRF BRINGS THE LEADING EDGE OF THE FRONTAL
PRECIP TO A CHESTER TO SAC TO NEAR STOCKTON LINE BY AROUND MIDNIGHT.
AS THE TROF SHARPENS...SATELLITE IMAGERY SHOWS SOME ENHANCEMENT
ALONG THE FRONT. HOWEVER...THE SHARPENING TROF ALSO CAUSES THE
ENERGY TO SPLIT AND WEAKENS THE FRONT AS IT MOVES FARTHER INLAND.
THUS...THE SERN PORTION OF THE FORECAST AREA IS NOT LIKELY TO
RECEIVE MUCH PRECIP...THAT BEING THE AREAS ROUGHLY SE OF HWY 50 IN
THE SIERNEV...AND THE NRN SAN JOAQUIN. AFTER MIDNIGHT...PRECIP
SHOULD WIND DOWN OVER AREAS W OF I-5. QPFS HAVE BEEN VARYING WIDELY
FROM MODEL RUN TO MODEL RUN WITH THIS SYSTEM. THE FRONT IS TAPPING
INTO A 1.25 TO 1.50 INCH PW PLUME...SO SOME 1 INCH PLUS QPFS ARE
LIKELY ESPECIALLY IN THE OROGRAPHICALLY FAVORED AREAS. GENERALLY WE
THINK THE NEARLY 1.0 INCH TOTAL FOR THE SAC AREA IS WAY TOO
HIGH...AND WE ARE THINKING ABOUT .10 TO .25 INCH. THERE WILL BE
ENOUGH SWLY FLOW AND OROGRAPHIC EFFECTS TO CONTINUE PRECIP INTO TUE
OVER THE NRN SIERNEV ESPECIALLY N OF HWY 50...WITH ONLY SLIGHT
CHANCE POPS ELSEWHERE AS OUR HIGH RESOLUTION QPF MODELS KEEP MUCH OF
THE WRN HALF OF THE CWA DRY FOR MOST OF THE DAY.

TUE NIGHT AND WED STORM #2 WILL IMPACT THE AREA AND WILL BE STRONGER
AND WETTER. CURRENTLY THIS STORM IS IN THE DEVELOPING STAGES OVER
THE ALEUTIANS AND IS FORECAST TO DEEPEN SIGNIFICANTLY OVER THE GULF
OF AK...BECOMING A MINUS 3 TO 4 STANDARD DEVIATION 500 MB ANOMALY
AND A MINUS 4.5 925 MB ANOMALY AND TRACKING OVER NORCAL. AFTER
WATCHING THIS EVOLVE IN THE MODELING SINCE LAST WED...A STRONG EAST
ASIAN JET DEVELOPED AND HEADED NEWD TOWARDS THE ALEUTIANS. THE
DEEPENING ERN PAC TROF WILL AMPLIFY THE CENTRAL PAC HIGH...ALLOWING
THE JET ENERGY DUE DIVE SEWD FROM THE GOA AND DEVELOP THE LARGE
NEGATIVE ANOMALY. THE EAST ASIAN JET HAS TAPPED INTO AN ATMOSPHERIC
RIVER ORIGINATING FROM THE PHILIPPINES. THE JET ENHANCED CONVECTION
E OF JAPAN WHILE THE TWO PHILIPPINE TYPHOONS WERE PRESENT. NOW THIS
TPW PLUME HAS CROSSED THE DATELINE AND WILL BECOME ENTRAINED INTO
THE DEVELOPING GOA LOW. THE PWAT IS FORECAST TO BE ABOUT A +4
ANOMALY...AND THE MOISTURE AND DYNAMICS WILL BECOME FOCUSED OVER
NORCAL DURING THIS TIME. THE GFS CROSS SECTIONS SHOW THE DEEPEST
MOISTURE AND GREATEST OMEGA DURING THE 06Z-12Z TIME FRAME ON WED. WE
EXPECT TO SEE AT LEAST DOUBLE OR TRIPLE THE QPFS IN THE VALLEY
WITH STORM #2. THE COLDER GOA LOW WILL EVENTUALLY LOWER SNOW
LEVELS BELOW THE MAJOR SIERNEV PASSES SO A WINTER STORM WATCH IS
IN EFFECT FOR THE SIERNEV ZONES DURING THIS TIME AS SEVERAL INCHES
OF SNOW ARE POSSIBLE.

PRESSURE GRADIENTS ARE FORECAST TO TIGHTEN AHEAD OF THE STRONG COLD
FRONT TUE NITE AND WED MORNING. ABOUT A 8 TO 9 MBS GRADIENT IS
FORECAST FROM MFR-SAC WITH 925 MBS WINDS FORECAST TO INCREASE TO 35
TO 40 KTS RESULTING IN THE POSSIBILITY OF NEAR WIND ADVISORY
CRITERIA FOR THE VALLEY. COULD ALSO SEE THUNDERSTORMS DEVELOP ON WED
AS THE 5H COLD POCKET STEEPENS LAPSE RATES OVER THE AREA. WITH SUCH
A LARGE LOW AFFECTING OUR AREA...BACKWASH CLOUDS AND SHOWERS ARE
LIKELY TO DEVELOP ON THU. BY FRI AND NEXT WEEKEND...RIDGING IS
EXPECTED TO BRING NORCAL DRIER AND WARMER WX.     JHM

&&

.AVIATION...

COLD FRONT MVG INLAND TODAY. CONDS WILL DETIORATE AS THE DAY
PROGRESSES. INCREASING CLOUDS WITH LOWERING CIGS AS THE FRONT
SPREADS PRECIPITATION ACROSS OUR ENTIRE CWA BY TONIGHT. VCSH WILL
FIRST AFFECT THE KRDD-KRBL VCNTY STARTING AROUND 14-16Z WITH -SHRA
AND MVFR/IFR CIGS STARTING BETWEEN 18-20Z. -SHRA AND MVFR/IFR CIGS
SHOULD AFFECT THE SAC METRO REGION 00-06Z WITH THESE CONDS AFFECTING
THE KSCK-KMOD VCNTY SOON AFTER. INCREASING ONSHORE FLOW WILL BRING
S-SWLY WINDS TO THE SAC VLY AND W-NWLY WINDS TO NRN SAN JOAQUIN
VLY. WIND SPEEDS AT THE TAF SITES SHOULD BE LGT TO MDT AT 5-15 KTS
WHILE RIDGETOP GUSTS PEAK BETWEEN 30-45 KTS. JBB

&&

.STO WATCHES/WARNINGS/ADVISORIES...
WINTER STORM WATCH FROM TUESDAY EVENING THROUGH WEDNESDAY
EVENING ABOVE 6000 FEET FOR THE WEST SLOPE NORTHERN SIERRA
NEVADA...WESTERN PLUMAS COUNTY/LASSEN PARK.

&&
Hazardous weather outlook, Oct 3, 7:00 AM PDT, 7 hours 44 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SACRAMENTO CA
700 AM PDT MON OCT 3 2011

CAZ013>019-063-064-066>069-041400-
SHASTA LAKE AREA/NORTHERN SHASTA COUNTY-
BURNEY BASIN/EASTERN SHASTA COUNTY-NORTHERN SACRAMENTO VALLEY-
CENTRAL SACRAMENTO VALLEY-SOUTHERN SACRAMENTO VALLEY-
CARQUINEZ STRAIT AND DELTA-NORTHERN SAN JOAQUIN VALLEY-
MOUNTAINS SOUTHWESTERN SHASTA TO NORTHERN LAKE COUNTIES-
CLEAR LAKE/SOUTHERN LAKE COUNTY-MOTHERLODE-
EAST FOOTHILLS/NORTH SACRAMENTO VALLEY-
WESTERN PLUMAS COUNTY/LASSEN PARK-WEST SLOPE NORTHERN SIERRA NEVADA-
700 AM PDT MON OCT 3 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR INTERIOR NORTHERN CALIFORNIA.

.DAY ONE...TODAY

SYSTEM NUMBER 1 WILL AFFECT INTERIOR NORTHERN CALIFORNIA TODAY
AND TONIGHT.

* WINTER STORM WATCH.........SEE WWUS46 KSTO - WSWSTO FOR DETAILS *

* SPECIAL WEATHER STATEMENT..SEE WWUS86 KSTO - SPSSTO FOR DETAILS *

.DAYS TWO THROUGH SEVEN... TUESDAY THROUGH SUNDAY

A SECOND...STRONGER AND WETTER STORM SYSTEM WILL AFFECT THE AREA
TUESDAY NIGHT AND WEDNESDAY.

* WINTER STORM WATCH.........SEE WWUS46 KSTO - WSWSTO FOR DETAILS *

* SPECIAL WEATHER STATEMENT..SEE WWUS86 KSTO - SPSSTO FOR DETAILS *

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS TO THEIR LOCAL NATIONAL WEATHER SERVICE OFFICE.

THE LATEST WEATHER INFORMATION IS AVAILABLE ON THE INTERNET AT
(LOWER CASE): HTTP://WWW.WRH.NOAA.GOV/STO

Nearby

Winter Storm Warnings in California, 2011Every winter storm warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.