Frost Advisory 23, NWS Medford, OR

935 
WWUS76 KMFR 080944
NPWMFR

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MEDFORD OR
244 AM PDT FRI JUN 8 2012

...A COLD AIR MASS WILL GENERATE FROST CONDITIONS EARLY THIS
MORNING AND POTENTIAL FREEZE CONDITIONS SATURDAY MORNING...

CAZ084-085-ORZ029>031-081745-
/O.NEW.KMFR.FZ.A.0009.120609T1000Z-120609T1400Z/
/O.CON.KMFR.FR.Y.0023.120608T1000Z-120608T1400Z/
NORTHEAST SISKIYOU AND NORTHWEST MODOC COUNTIES-MODOC COUNTY-
KLAMATH BASIN-
NORTHERN AND EASTERN KLAMATH COUNTY AND WESTERN LAKE COUNTY-
CENTRAL AND EASTERN LAKE COUNTY-
INCLUDING THE CITIES OF...ALTURAS...BEATTY...BLY...CHEMULT...
CRESCENT...GILCHRIST...SPRAGUE RIVER
244 AM PDT FRI JUN 8 2012

...FROST ADVISORY REMAINS IN EFFECT UNTIL 7 AM PDT THIS MORNING...
...FREEZE WATCH IN EFFECT FROM LATE TONIGHT THROUGH SATURDAY
MORNING...

THE NATIONAL WEATHER SERVICE IN MEDFORD HAS ISSUED A FREEZE
WATCH...WHICH IS IN EFFECT FROM LATE TONIGHT THROUGH SATURDAY
MORNING. A FROST ADVISORY REMAINS IN EFFECT UNTIL 7 AM PDT THIS
MORNING. 

* TEMPERATURE...33 TO 36 THIS MORNING. TEMPERATURES COULD REACH BELOW
  FREEZING SATURDAY MORNING.

* TEMPERATURE INVERSION...AN INVERSION IS EXPECTED THIS MORNING AND
  SATURDAY MORNING...SO TEMPERATURES ABOVE THE SURFACE WILL BE A
  FEW DEGREES WARMER THAN THE SURFACE.

* LOCATIONS INCLUDE: BEATTY...LAKEVIEW...BLY...KLAMATH FALLS...
  CHILOQUIN...CRESCENT...GILCHRIST...SPRAGUE RIVER...ALTURAS.

* IMPACTS...SENSITIVE VEGETATION COULD BE DAMAGED OR KILLED IF
  LEFT UNPROTECTED. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR
PLANTS MAY BE KILLED IF LEFT UNCOVERED.

A FREEZE WATCH MEANS SUB-FREEZING TEMPERATURES ARE POSSIBLE.
THESE CONDITIONS COULD KILL CROPS AND OTHER SENSITIVE VEGETATION.

&&

$$

SK

307 
WWUS76 KMFR 081410
NPWMFR

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MEDFORD OR
710 AM PDT FRI JUN 8 2012

...A COLD AIR MASS WILL GENERATE FROST CONDITIONS EARLY THIS
MORNING AND POTENTIAL FREEZE CONDITIONS SATURDAY MORNING...

CAZ084-085-ORZ029>031-082215-
/O.EXP.KMFR.FR.Y.0023.000000T0000Z-120608T1400Z/
/O.CON.KMFR.FZ.A.0009.120609T1000Z-120609T1400Z/
NORTHEAST SISKIYOU AND NORTHWEST MODOC COUNTIES-MODOC COUNTY-
KLAMATH BASIN-
NORTHERN AND EASTERN KLAMATH COUNTY AND WESTERN LAKE COUNTY-
CENTRAL AND EASTERN LAKE COUNTY-
INCLUDING THE CITIES OF...ALTURAS...BEATTY...BLY...CHEMULT...
CRESCENT...GILCHRIST...SPRAGUE RIVER
710 AM PDT FRI JUN 8 2012

...FREEZE WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH
SATURDAY MORNING...
...FROST ADVISORY HAS EXPIRED...

THE FROST ADVISORY HAS EXPIRED. A FREEZE WATCH REMAINS IN EFFECT 
FROM LATE TONIGHT THROUGH SATURDAY MORNING.


* TEMPERATURE...TEMPERATURES COULD REACH BELOW FREEZING SATURDAY
  MORNING.

* TEMPERATURE INVERSION...AN INVERSION IS EXPECTED SATURDAY
  MORNING...SO TEMPERATURES ABOVE THE SURFACE WILL BE A FEW
  DEGREES WARMER THAN THE SURFACE.

* LOCATIONS INCLUDE: BEATTY...LAKEVIEW...BLY...KLAMATH FALLS... 
  CHILOQUIN...CRESCENT...GILCHRIST...SPRAGUE RIVER...ALTURAS.

* IMPACTS...SENSITIVE VEGETATION COULD BE DAMAGED OR KILLED IF
  LEFT UNPROTECTED.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WATCH MEANS SUB-FREEZING TEMPERATURES ARE POSSIBLE.
THESE CONDITIONS COULD KILL CROPS AND OTHER SENSITIVE VEGETATION.

&&

$$

PETRUCELLI

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MEDFORD OR
240 PM PDT THU JUN 7 2012

.DISCUSSION...LATEST VISIBLE IMAGE SHOWS BROKEN UP CLOUD COVER OVER
MOST OF THE AREA WITH HIGH AND MID CLOUDS IN SOUTHEAST LAKE AND
MODOC COUNTIES. THE COLD FRONT HAS MOVED EAST OF MEDFORD AND SHOULD
CLEAR THE FORECAST AREA EARLY THIS EVENING. LIGHT SCATTERED SHOWERS
ARE DEVELOPING BEHIND THE FRONT. HOWEVER....DO NOT EXPECT THEM TO
INCREASE IN COVERAGE OR INTENSITY THE REST OF THE AFTERNOON.

ONE THING TO NOTE ON THE VISIBLE IMAGE ARE THE POPCORN CONFIGURATION
OF CLOUDS OVER THE EASTERN PACIFIC. THIS WILL HEAD OUR WAY TONIGHT
THROUGH FRIDAY COURTESY OF A STRONG UPPER LOW. THIS LOW WILL USHER
IN COLDER AIR ALOFT WHICH WILL RESULT IN INCREASING SHOWERS DURING
THE DAY FRIDAY. THE COLDEST AIR MASS SHOULD REMAIN NORTH OF THE
AREA. HOWEVER ENOUGH INSTABILITY EXIST FOR A FEW ISOLATED STORMS
LATE FRIDAY AFTERNOON THROUGH EARLY EVENING ALONG THE NORTHERN PART
OF THE CWA. ELSEWHERE...SCATTERED SHOWERS ARE EXPECTED WITH SOME
OF THOSE SHOWERS COULD PRODUCING SMALL BUT BRIEF HAIL.

THE MODELS ARE IN FAIRLY GOOD AGREEMENT SWINGING THE UPPER LOW
THROUGH THE AREA FRIDAY NIGHT...THEN MOVING SOUTHEAST SATURDAY
MORNING. THIS WILL RESULT IN COOL TEMPERATURES EAST OF THE CASCADES.
IT'S QUESTIONABLE HOW MUCH CLEARING...IF ANY TAKES PLACE. RIGHT NOW
WERE THINKING THERE WON'T BE ENOUGH CLEARING FOR TEMPERATURES TO
DROP TO FREEZING.

SATURDAY WILL BE A TRANSITION DAY WITH ISOLATED TO SCATTERED
SHOWERS IN THE MORNING FOLLOWED BY INCREASING DRY TIME IN THE
AFTERNOON AS THE UPPER LOW DEPARTS AND 500MB HEIGHTS INCREASE AS AN
UPPER RIDGE SHIFTS EAST TOWARDS THE FORECAST AREA. TEMPERATURES
SATURDAY WILL BE MILDER WITH READINGS AVERAGING BETWEEN 5-7 DEGREES
WARMER.

THE MODELS HAVE REMAINED CONSISTENT OVER THE PAST FEW DAYS
ADVERTISING A DRY AND WARMER PATTERN SUNDAY THROUGH EARLY NEXT WEEK.
A THERMAL TROUGH WILL DEVELOP ALONG THE COAST WITH OFFSHORE FLOW
DEVELOPING. THIS WILL KEEP SKIES CLEAR TO MOSTLY CLEAR DURING THE
DAYS AND NIGHTS WITH ABOVE NORMAL TEMPERATURES SUNDAY THROUGH NEXT
TUESDAY.

ON WEDNESDAY AND THURSDAY...THE THE MODELS SHOW A WEAK TROUGH
MOVING INTO THE AREA  BRINGING INCREASED ONSHORE FLOW. HOWEVER IT
LOOKS LIKE ANY PRECIPITATION WILL REMAIN NORTH. -PETRUCELLI

&&

.AVIATION...VFR CONDITIONS ARE EXPECTED TO CONTINUE THROUGH THIS
EVENING. HOWEVER ISOLATED TO SCATTERED SHOWERS MAY RESULT IN
TEMPORARY MVFR CIGS AND PARTIAL MTN OBSCURATION UNTIL AROUND 4Z. MVFR
CIGS RETURN AT THE COAST LATE TONIGHT INTO FRIDAY MORNING WITH VFR
CONDITIONS EXPECTED ELSEWHERE.

&&

.MFR WATCHES/WARNINGS/ADVISORIES...
OR...NONE.

CA...NONE.

PZ...NONE.