Thursday, September 26, 2013

[californiadisasters] Red Flag Warnings - NorCal/CenCal (9/25/13-PM)



...RED FLAG WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO  3 PM PDT FRIDAY FOR GUSTY NORTH WINDS AND LOWERING HUMIDITY  VALUES...    * AFFECTED AREA: FIRE ZONE 507 NORTH BAY MOUNTAINS...FIRE ZONE    511 EAST BAY HILLS AND DIABLO RANGE. THIS INCLUDES ALL HILLS    IN THE NORTH AND EAST BAY ABOVE 1000 FEET INCLUDING MOUNT    TAMALPAIS...MOUNT DIABLO AND MOUNT SAINT HELENA.    * TIMING: STRONG WINDS WILL DEVELOP AROUND 11 PM TONIGHT AND    LAST INTO THURSDAY MORNING. WINDS WILL INCREASE AGAIN THURSDAY    NIGHT INTO EARLY FRIDAY.    * WIND: NORTHERLY WINDS 15 TO 25 MPH WITH FREQUENT GUSTS 35 TO    45 MPH OVER THE HIGHEST PEAKS OF NAPA COUNTY AS WELL AS MOUNT    SAINT HELENA AND MOUNT DIABLO. STRONGEST WINDS EXPECTED FROM    LATE TONIGHT THROUGH THURSDAY MORNING AND THEN AGAIN LATE    THURSDAY EVENING THROUGH FRIDAY MORNING.    * HUMIDITY: INITIALLY MOIST VALUES AROUND 50-60% TONIGHT WILL    LOWER TO 30-40% BY THURSDAY MORNING...THEN CONTINUE TO DRY    OUT TO LESS THAN 30% FROM THURSDAY AFTERNOON THROUGH FRIDAY    WITH NO OVERNIGHT HUMIDITY RECOVERY EXPECTED THURSDAY NIGHT.    * IMPACTS: ANY NEW IGNITIONS WILL HAVE THE POTENTIAL TO PRODUCE    WIND DRIVEN FIRE BEHAVIOR TONIGHT INTO EARLY THURSDAY.    WARMING AND DRYING ALONG WITH PERSISTENT OFFSHORE FLOW WILL    MAKE SUPPRESSION DIFFICULT. SIMILAR WEATHER EVENTS IN THE    PAST HAVE BROUGHT DOWN POWER LINES AND OTHER IGNITION SOURCES    THAT HAVE STARTED NEW FIRES. EXTRA CARE WITH IGNITION SOURCES    IS URGED.    PRECAUTIONARY/PREPAREDNESS ACTIONS...    A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS  ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF  STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES CAN  CONTRIBUTE TO EXTREME FIRE BEHAVIOR.    &&    $$

URGENT - FIRE WEATHER MESSAGE  NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA  250 PM PDT WED SEP 25 2013    CAZ512-517-518-261300-  /O.CON.KMTR.FW.W.0004.130926T2000Z-130927T2200Z/  SANTA CRUZ MOUNTAINS-  SANTA LUCIA MOUNTAINS AND LOS PADRES NATIONAL FOREST-  MOUNTAINS OF SAN BENITO AND INTERIOR MONTEREY COUNTY INCLUDING  PINNACLES NATIONAL PARK-  250 PM PDT WED SEP 25 2013    ...RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM THURSDAY TO 3 PM  PDT FRIDAY FOR GUSTY NORTH WINDS AND LOWERING HUMIDITY VALUES...    * AFFECTED AREA: FIRE ZONE 512 SANTA CRUZ MOUNTAINS...FIRE ZONE    517 SANTA LUCIA MOUNTAINS AND LOS PADRES NATIONAL FOREST...    FIRE ZONE 518 MOUNTAINS OF SAN BENITO AND INTERIOR MONTEREY    COUNTY INCLUDING PINNACLES NATIONAL PARK. THIS INCLUDES ALL    HILLS ABOVE 1000 FEET IN MONTEREY AND SAN BENITO COUNTY AS    WELL AS THE SANTA CRUZ MOUNTAINS.    * TIMING: WARM AND DRY CONDITIONS WILL DEVELOP BY EARLY    THURSDAY AFTERNOON. IN ADDITION...STRONG AND GUSTY OFFSHORE    WINDS WILL CONTINUE IN THE HILLS. NO HUMIDITY RECOVERY IS    EXPECTED THURSDAY NIGHT. CONTINUED WARMING AND DRYING ALONG    WITH PERSISTENT OFFSHORE WIND FLOW IS FORECAST THROUGH AT    LEAST FRIDAY AFTERNOON.    * WIND: NORTHERLY WINDS 10 TO 20 MPH WITH FREQUENT GUSTS 25 TO    35 MPH. STRONGEST WINDS OVER THE HILLS IN THE LOS PADRES    NATIONAL FOREST AS WELL AS THE HIGHER RIDGES ABOVE 2500 FEET    IN SANTA CRUZ AND SAN BENITO COUNTIES. STRONGEST WINDS ARE    FORECAST TO OCCUR ON THURSDAY AND THURSDAY NIGHT WITH WINDS    GRADUALLY EASING BY FRIDAY AFTERNOON.    * HUMIDITY: 20-30% THURSDAY AFTERNOON WITH LITTLE OR NO    RECOVERY THURSDAY NIGHT. CONTINUED DRYING ON FRIDAY WITH    WIDESPREAD HUMIDITY VALUES OF 10-20%.    * IMPACTS: MANY OF THE HILLS OF MONTEREY AND SAN BENITO COUNTY    HAVE RECEIVED LITTLE OR NO RAINFALL THIS SEASON. RAPID FIRE    GROWTH WILL BE LIKELY UNDER THIS WEATHER PATTERN. HUNTERS...    CAMPERS AND OTHERS VISITING THE OUTDOORS AS WELL AS    PRESCRIBED BURNERS SHOULD EXERCISE EXTREME CAUTION THURSDAY    AND FRIDAY.    PRECAUTIONARY/PREPAREDNESS ACTIONS...    A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS  ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF  STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES CAN  CONTRIBUTE TO EXTREME FIRE BEHAVIOR.    &&    $$      HTTP://WEATHER.GOV/SANFRANCISCO

URGENT - FIRE WEATHER MESSAGE  NATIONAL WEATHER SERVICE SACRAMENTO CA  1143 PM PDT WED SEP 25 2013    ...GUSTY NORTH WINDS THURSDAY MORNING INTO FRIDAY LEADING TO  DRIER CONDITIONS...    .A LOW PRESSURE SYSTEM DROPPING SOUTH OF THE REGION EARLY THURSDAY  WILL BRING A PERIOD OF GUSTY NORTH WINDS AND LOWERING HUMIDITY TO  NORTHERN CALIFORNIA. DESPITE RECENT LIGHT RAIN...FUELS IN THE  WARNING AREA REMAIN VERY DRY. THE STRONGEST WINDS ARE EXPECTED  THURSDAY INTO EARLY FRIDAY ABOVE 2000 FEET ELEVATION ESPECIALLY  DURING THE EVENING AND MORNING HOURS. LIGHTER WINDS ARE EXPECTED  BY FRIDAY AFTERNOON BUT RELATIVE HUMIDITY WILL REMAIN LOW INTO THE  EVENING HOURS.    CAZ264-270000-  /O.CON.KSTO.FW.W.0011.130926T1200Z-130927T2200Z/  LAKE COUNTY PORTION OF LAKE-NAPA-SONOMA UNIT-  1143 PM PDT WED SEP 25 2013    ...RED FLAG WARNING REMAINS IN EFFECT FROM 5 AM THURSDAY TO 3 PM  PDT FRIDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE  WEATHER ZONE 264 ABOVE 2000 FEET...    * AFFECTED AREA...FIRE WEATHER ZONE 264 LAKE COUNTY PORTION OF    LAKE-NAPA-SONOMA UNIT ABOVE 2000 FEET.    * WINDS...NORTH 10 TO 20 MPH WITH GUSTS UP TO 35 MPH.    * RELATIVE HUMIDITY...AS LOW AS 13 PERCENT.    * IMPACTS...GUSTY WINDS AND LOW HUMIDITY COULD CREATE    DANGEROUS FIRE WEATHER CONDITIONS...ESPECIALLY ABOVE 2000 FEET    ELEVATION WHERE THE WINDS WILL BE STRONGEST.    * FOR A DETAILED VIEW OF THE HAZARD AREA...VISIT    HTTP://WWW.WEATHER.GOV/SACRAMENTO/HAZARDS    PRECAUTIONARY/PREPAREDNESS ACTIONS...    A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS  ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF  STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES CAN  CONTRIBUTE TO EXTREME FIRE BEHAVIOR.    &&    INTERACT WITH US VIA SOCIAL MEDIA  WWW.FACEBOOK.COM/NWS.SACRAMENTO  WWW.TWITTER.COM/NWSSACRAMENTO
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