000 
FXUS66 KMFR 211650
AFDMFR

SOUTHWEST OREGON/NORTHERN CALIFORNIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MEDFORD OR
830 AM PST THU MAR 21 2002

LOTS OF CIRRUS OVER THE REGION TODAY AGAIN. 12Z MFR SOUNDING IS
CONSIDERABLY WARMER THAN YESTERDAY BELOW 850 MB. MFR REACHED 65
YESTERDAY SO WILL KEEP THE 67 TODAY. ONLY FLY IN OINTMENT IS THE
SOUTHEAST WIND WHICH IS 20 KNOTS AT 4000 FT ASL. IF WIND WERE TO
SURFACE IN THE VALLEY WE WOULD WARM TO 70 OR ABOVE. WITH UPPER TROUGH
STILL FAR OFFSHORE DO NOT EXPECT THIS WIND TO SURFACE AT THE AIRPORT
TODAY...BUT TOMORROW IS A DIFFERENT STORY.

MANY AREAS ON THE EAST SIDE AND NORTHERN CALIFORNIA WERE QUITE WARM
YESTERDAY SO WILL BUMP UP TEMPERATURES TODAY FOR THOSE AREAS. 

SOMETHING TO CONSIDER FOR FRIDAY IS THE THUNDERSTORM POTENTIAL. BY
00Z SATURDAY THE NEGATIVELY TILTED UPPER TROUGH IS JUST OFFSHORE AND
MOISTURE INCREASES DRAMATICALLY. SIGNIFICANT COOLING OCCURS ALOFT AND
SHORT WAVE SHOULD SUPPLY LIFT WEST OF THE CASCADES. FOR THE AFTERNOON
FORECAST ISSUANCE WILL CONSIDER ADDING ISOLATED THUNDERSTORMS IN THE
CASCADES AND AREAS TO THE SOUTH AND WEST. ALSO...SPC HAS THIS AREA
OUTLINED FOR THUNDERSTORMS. 
SANDLER

.MFR...NONE.