Severe Thunderstorm Warning 5, NWS Eureka, CA

000 
WWUS56 KEKA 022152
SVSEKA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EUREKA CA
252 PM PDT TUE JUN 2 2009

CAC105-022200-
/O.CON.KEKA.SV.W.0005.000000T0000Z-090602T2200Z/
TRINITY CA-
252 PM PDT TUE JUN 2 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM PDT
FOR CENTRAL TRINITY COUNTY...

AT 250 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE 
HAIL AND DAMAGING WINDS. THIS STORM WAS LOCATED NEAR PEANUT...OR 15 
MILES WEST OF YOLLA BOLLY DISTRICT RS...MOVING NORTH AT 20 MPH.

THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS
OF THE INDICATED COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

&&

LAT...LON 4052 12344 4060 12314 4029 12306 4024 12325
TIME...MOT...LOC 2150Z 161DEG 18KT 4044 12324

$$

BK

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EUREKA CA
330 AM PDT TUE JUN 2 2009

.SYNOPSIS...A LARGE AREA OF LOW PRESSURE IN THE EASTERN PACIFIC WILL
CONTINUE TO PUMP MOIST AIR INTO CALIFORNIA. SCATTERED SHOWER AND
THUNDERSTORM ACTIVITY WILL CONTINUE THROUGH FRIDAY.

&&

.SHORT TERM (TODAY THROUGH THURSDAY)...CONVECTIVE ACTIVITY HAS
WANED SIGNIFICANTLY OVER THE LAST 4-5 HOURS DESPITE A DEEP MOIST
LAYER AND GENERALLY FAVORABLE DYNAMICS AND INSTABILITY ASSOCIATED
AN APPROACHING CUT OFF LOW. COULD BE THE LULL BEFORE THE (STORM) AS
ANOTHER ROUND OF CONVECTION IS EXPECTED LATER TODAY...WHICH MAY BE
THE MOST INTENSE YET.  THE STORM PREDICTION CENTER HAS INDICATED
A THREAT OF SEVERE WEATHER ACROSS A MAJORITY OF THE CWA BEGINNING
LATER THIS MORNING.  ALTHOUGH 1INCH HAIL IS UNLIKELY OVER THE CWA
DIME TO PENNY SIZE IS NOT OUT OF THE QUESTION AS ANOTHER SHORT WAVE
ROTATES AROUND THE APPROACHING LOW LATER TODAY ENHANCING CONVECTIVE
POTENTIAL. MUCAPE VALUES ARE NEARLY OFF THE CHART OVER THE CWA AT
THE TIME OF MAXIMUM DAYTIME HEATING. A RETURN OF A MODERATE THETA
A RIDGE ACROSS THE NORTHERN PORTION OF THE CWA  ALONG WITH STRONG
DIFFLUENT FLOW ACROSS MUCH OF NORTHERN CALIFORNIA. STORM DEVELOPMENT
MAY CONTINUE WELL INTO THE EVENING AND NIGHTIME HOURS TONIGHT AS
ANOTHER FAVORABLE AREA OF LIFT OCCURS TO THE SOUTHEAST WHERE MID
LEVEL STEERING FLOW WOULD CARRY STORMS BACK ACROSS THE EKA
CWA...WHILE AT THE SAME TIME BEING SUSTAINED BY THE NOSE OF A
60-70KT JET OVERHEAD.  CONVECTIVE POTENTIAL CONTINUES INTO WEDNESDAY
BUT SLIGHTLY REDUCED AS THE PARENT LOW FINALLY TRECKS EASTWARD
AND FLOW BECOMES ALMOST EASTERLY BY THE END OF THE DAY AND INTO
THURSDAY. TONKIN

.PREVIOUS LONG TERM (THURSDAY NIGHT THROUGH MONDAY)...THE LARGE
UPPER LOW OFF THE CALIFORNIA COAST IS FORECAST WITH GOOD MODEL
AGREEMENT TO MOVE ONSHORE THURSDAY NIGHT NORTH OF POINT CONCEPTION.
THE LOW IS FORECAST TO SWING NORTHEAST ACROSS THE REGION ON FRIDAY
WITH CONTINUED MOISTURE AND INSTABILITY...SO KEPT SLIGHT CHANCE OF
THUNDERSTORMS ACROSS THE CWA THROUGH FRIDAY. ALLOWED TSTM ACTIVITY
TO CEASE FRIDAY NIGHT AS THE LOW IS DEPICTED MOVING FURTHER INLAND
TO THE NORTHEAST. SATURDAY INTO SUNDAY MODELS DEPICT THE LOW
ELONGATING FROM SW TO NE ACROSS THE WESTERN UNITED
STATES...ULTIMATELY FORMING A SPLIT FLOW ALOFT WITH THE SOUTHERN LOW
PUSHING OFFSHORE OVER THE SOUTHERN CALIF WATERS...AND THE NORTHERN
WAVE MOVING EASTWARD FAIRLY RAPIDLY. THIS SOLUTION WOULD LEAVE
NORTHERN CALIFORNIA IN A REGION OF WEAK FLOW ALOFT AND AT THE
SURFACE...BUT WITH MOISTURE LINGERING OVER THE AREA A CONTINUED LOW
CHANCE OF SHOWERS THROUGH THE EXTENDED SEEMS APPROPRIATE. CMC

&&

.AVIATION...A MIXED BAG OF CLOUDS AND AVIATION WEATHER PERSISTS
ACROSS NORTHWEST CALIFORNIA AS A LOW PRESSURE SYSTEM DRAWS NEARER TO
THE COAST.  DESPITE VERY WEAK OFFSHORE FLOW AND FAIRLY GOOD MIXING
AT MID LEVELS THE MARINE LAYER, ALBEIT SHALLOW, REMAINS ENTRENCHED
BRINGING MVFR CIGS TO THE COASTAL TERMINALS.  MEANWHILE THE
ATMOSPHERE IS DESTABILIZING WHICH WILL ENHANCE CHANCES FOR SHOWERS
AND THUNDERSTORMS THROUGHOUT THE PERIOD ACROSS THE INTERIOR AND THE
COAST.  THE CURRENT PATTERN SHOULD CONTINUE THROUGH THE NEXT COUPLE
OF TAF CYCLES.

&&

.EKA WATCHES/WARNINGS/ADVISORIES...

NONE.

&&

VISIT US AT HTTP://WWW.WEATHER.GOV/EUREKA

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE EUREKA CA
403 AM PDT TUE JUN 2 2009

CAZ001>004-076-031115-
REDWOOD COAST-MENDOCINO COAST-NORTH COAST INTERIOR-
UPPER TRINITY RIVER-MENDOCINO INTERIOR-
403 AM PDT TUE JUN 2 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST
CALIFORNIA.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORM ACTIVITY WILL CONTINUE ACROSS NORTHWEST CALIFORNIA
TODAY AND TONIGHT. STORMS WILL BE ACCOMPANIED BY LIGHTNING...HAIL
...GUSTY WINDS AND POTENTIALLY HEAVY RAIN. ALTHOUGH A MAJORITY OF
THE STORMS ARE NOT EXPECTED TO BECOME SEVERE...THE THREAT OF
ISOLATED STORMS CONTAINING DAMAGING WINDS OR HAIL IS POSSIBLE.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

THUNDERSTORM ACTIVITY WILL CONTINUE ACROSS NORTHWEST CALIFORNIA
WEDNESDAY AND THURSDAY. STORMS WILL BE ACCOMPANIED BY LIGHTNING...HAIL
...GUSTY WINDS AND POTENTIALLY HEAVY RAIN. ALTHOUGH A MAJORITY OF
THE STORMS ARE NOT EXPECTED TO BECOME SEVERE...THE THREAT OF
ISOLATED STORMS CONTAINING DAMAGING WINDS OR HAIL IS POSSIBLE.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS SUCH AS LIGHTNING...STRONG WINDS...HAIL OR FLOODING TO
THEIR LOCAL NATIONAL WEATHER SERVICE OFFICE.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE EUREKA CA
849 AM PDT TUE JUN 2 2009

CAZ001>004-076-030000-
REDWOOD COAST-MENDOCINO COAST-NORTH COAST INTERIOR-
UPPER TRINITY RIVER-MENDOCINO INTERIOR-
849 AM PDT TUE JUN 2 2009

SCATTERED TO NUMEROUS THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS
AFTERNOON ACROSS NORTHERN CALIFORNIA ACCOMPANIED BY FREQUENT
LIGHTNING...LOCALLY HEAVY RAINFALL...SMALL HAIL AND GUSTY WINDS.
SOME OF THE STRONGER STORMS MAY PRODUCE DAMAGING WINDS AND LARGE
HAIL. THUNDERSTORM ACTIVITY WILL LIKELY CONTINUE INTO THE LATE
EVENING HOURS.

PEOPLE TRAVELING OR PLANNING OUTDOOR ACTIVITY THIS AFTERNOON
ARE URGED TO USE CAUTION. STAY TUNED TO NOAA WEATHER RADIO OR
LOCAL MEDIA FOR THE LATEST FORECASTS AND INFORMATION.

BK

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE EUREKA CA
114 PM PDT TUE JUN 2 2009

CAZ001-003-004-076-022215-
REDWOOD COAST-NORTH COAST INTERIOR-UPPER TRINITY RIVER-
MENDOCINO INTERIOR-
114 PM PDT TUE JUN 2 2009

SCATTERED THUNDERSTORMS HAVE DEVELOPED ACROSS NORTHERN CALIFORNIA
THIS AFTERNOON ACCOMPANIED BY FREQUENT LIGHTNING AND LOCALLY HEAVY
RAINFALL. SOME OF THE STRONGER STORMS MAY BE CAPABLE OF PRODUCING
DAMAGING WINDS AND LARGE HAIL. IN ADDITION...LOCALIZED FLOODING OF
SMALL STREAMS AND URBAN AREAS IS POSSIBLE IN THE HEAVIEST DOWNPOURS.
SHOWER AND THUNDERSTORM ACTIVITY IS EXPECTED TO CONTINUE INTO THE
LATE EVENING HOURS.

PEOPLE TRAVELING OR PLANNING OUTDOOR ACTIVITY THIS AFTERNOON
ARE URGED TO USE CAUTION...AND STAY TUNED TO NOAA WEATHER RADIO
OR LOCAL MEDIA FOR THE LATEST FORECASTS AND INFORMATION.