Dual Messages-Fire Weather Watch and Thunderstorms/Rain

[G. Alan Ferguson]

URGENT - FIRE WEATHER MESSAGE

NATIONAL WEATHER SERVICE MEDFORD OR

414 AM PDT TUE AUG 6 2013

.AN UPPER LOW CURRENTLY OFF THE CALIFORNIA COAST WILL MOVE INLAND THIS WEEK. THERE IS A SLIGHT CHANCE OF DRY THUNDERSTORMS TONIGHT INTO WEDNESDAY MORNING. THEN SCATTERED THUNDERSTORM ARE EXPECTED TO DEVELOP WEDNESDAY AFTERNOON AND EVENING, AND AGAIN ON THURSDAY. SCATTERED LIGHTNING OVER CONTINUED DRY TO VERY DRY FUELS MAY RESULT IN NEW FIRE STARTS. THUNDERSTORMS AND SHOWERS ARE EXPECTED TO CONTINUE FRIDAY AND SATURDAY...BUT CONDITIONS MAY BECOME INCREASINGLY WET.

CAZ280-ORZ621-062315- /O.EXB.KMFR.FW.A.0006.130807T1800Z-130809T0600Z/ WESTERN KLAMATH NATIONAL FOREST-SISKIYOU MOUNTAINS- 414 AM PDT TUE AUG 6 2013

...FIRE WEATHER WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH THURSDAY EVENING FOR ABUNDANT LIGHTNING WITH DRY FUELS FOR FIRE WEATHER ZONE 280 IN CALIFORNIA AND 621 IN OREGON...

THE NATIONAL WEATHER SERVICE IN MEDFORD HAS ISSUED A FIRE WEATHER WATCH...WHICH IS IN EFFECT FROM WEDNESDAY MORNING THROUGH THURSDAY EVENING.

* AFFECTED AREA: FIRE WEATHER ZONE 280 IN CALIFORNIA AND 621 IN   OREGON.

* THUNDERSTORMS...ISOLATED STORMS WEDNESDAY MORNING MAY BECOME   SCATTERED BY WEDNESDAY AFTERNOON AND EVENING WITH SCATTERED   THUNDERSTORMS AGAIN POSSIBLE ON THURSDAY.

* OUTFLOW WINDS...GUSTS OF 40 TO 50 MPH ARE POSSIBLE NEAR ANY   STORMS.

* IMPACTS...ABUNDANT LIGHTNING ON DRY FUELS MAY RESULT IN NEW   FIRE STARTS. OUTFLOW WINDS MAY CAUSE NEW FIRES TO SPREAD.

* FOR A DETAILED VIEW OF THE HAZARD AREA...VISIT   HTTP://WWW.WRH.NOAA.GOV/WRH/WHV/?WFO=MFR

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FIRE WEATHER WATCH MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE MAY OCCUR. LISTEN FOR LATER FORECASTS AND POSSIBLE RED FLAG WARNINGS.

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Special Weather Statement

Valid: August 06 at 4:00AM PDT

 

...INCREASING MOISTURE AND INSTABILITY WILL BOOST CHANCES FOR THUNDERSTORMS THIS WEEK... A CLASSIC PATTERN FOR THUNDERSTORMS SHAPES UP OVER THE FORECAST AREA THIS WEEK...WITH A CUTOFF LOW SETTING UP OFF THE NORTHERN CALIFORNIA COAST.  AHEAD OF THIS LOW...A FETCH OF DEEP SOUTHERLY FLOW WILL INCREASE MOISTURE ACROSS SOUTHERN OREGON AND NORTHERN CALIFORNIA FROM TONIGHT THROUGH FRIDAY. THUNDERSTORMS ARE MOST LIKELY WEDNESDAY THROUGH FRIDAY.  AS MOISTURE INCREASES...THE THUNDERSTORMS WILL BECOME WETTER AND COVERAGE SHOULD EXPAND TO MUCH OF SOUTHERN OREGON AND NORTHERN CALIFORNIA.  BRIEF PERIODS OF HEAVIER RAIN MAY ACCOMPANY THESE STORMS...ESPECIALLY GIVEN THAT STORM MOTION IS EXPECTED TO BE SLOW. ANY LIGHTNING COULD PRODUCE NEW WILDFIRES BUT THIS THREAT WILL BE DIMINISHED GIVEN THESE THUNDERSTORMS WILL TRANSITION TOWARD THE WETTER VARIETY LATER IN THE WEEK.  HEAVY RAINFALL ACCOMPANYING THESE STORMS COULD PRODUCE FLASH FLOODING ON RECENTLY BURNED AREAS...SO FIREFIGHTING AGENCIES SHOULD BE AWARE OF THIS POTENTIAL HAZARD.  GUSTY AND ERRATIC WINDS WILL ALSO BE POSSIBLE WITH THUNDERSTORMS.  THE UPSHOT IS THAT RAINFALL COULD BE BENEFICIAL TO FIREFIGHTING EFFORTS IF ANY STORMS LINGER OVER CURRENT FIRES... DAMPENING FIRE ACTIVITY. LAST BUT NOT LEAST...THESE STORMS COULD PROVIDE SOME SMOKE RELIEF. INSTABILITY WILL HELP TO CLEAR THE AIR DURING THE AFTERNOONS AND ANY RAIN THAT OCCURS WILL REDUCE SMOKE IN THE AIR.

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