Severe Thunderstorm Warning 1, NWS Medford, OR

000 
WWUS56 KMFR 280157
SVSMFR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEDFORD OR
656 PM PDT FRI MAY 27 2005

CAC093-280230-
/O.CON.KMFR.SV.W.0001.000000T0000Z-050528T0230Z/
SISKIYOU CA-
656 PM PDT FRI MAY 27 2005

...A SEVERE THUNDERSTORM WARNING CONTINUES UNTIL 730 PM PDT FOR NORTH
CENTRAL SISKIYOU COUNTY...

AT 645 PM PDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING DIME SIZE HAIL.  THIS STORM WAS
LOCATED OVER NORTH CENTRAL SISKIYOU COUNTY...OR ABOUT 10 MILES NORTH
OF YREKA...MOVING NORTH AT 10 MPH.

LAT...LON 4177 12279 4173 12255 4199 12244 4199 12274

$$

REYNOLDS

000 
WWUS56 KMFR 280230
SVSMFR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEDFORD OR
729 PM PDT FRI MAY 27 2005

CAC093-280239-
/O.EXP.KMFR.SV.W.0001.000000T0000Z-050528T0230Z/
SISKIYOU CA-
729 PM PDT FRI MAY 27 2005

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL SISKIYOU COUNTY
HAS BEEN ALLOWED TO EXPIRE AT 730 PM PDT...

THUNDERSTORMS HAVE WEAKENED AND MOVED TO THE NORTH AND ARE NO LONGER 
A THREAT TO THE AREA.

LAT...LON 4177 12279 4173 12255 4199 12244 4199 12274

$$

REYNOLDS

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MEDFORD OR
120 PM PDT FRI MAY 27 2005

.DISCUSSION...

THE MAIN FEATURES ARE DEEP MOISTURE IN WEAK SOUTHERLY FLOW WITH
COOLING ALOFT AND WEAK DIVERGENCE AT 500MB AS A CLOSED LOW NEAR 40N
130W MOVES TOWARD NORTHWEST CALIFORNIA. THESE FEATURES WILL CONTINUE
THE THUNDERSTORMS WELL INTO THE EVENING AND POSSIBLY MOST OF THE
NIGHT EAST OF THE CASCADES WHERE THE GFS SHOWS A SHORT WAVE ROTATING
UP FROM THE SOUTH.

SATURDAY AND SATURDAY EVENING THUNDERSTORMS WILL REDEVELOP AS THE
UPPER LOW MOVES EAST JUST SOUTH OF THE OREGON BORDER. COOLER TEMPS
ALOFT AND WIDESPREAD CLOUDINESS WILL BRING DOWN THE TEMPERATURES AS
COMPARED WITH TODAY. THE LOW CONTINUES TO MOVE SLOWLY JUST SOUTH OF
THE OREGON BORDER SUNDAY MAINTAINING THE COOLER TEMPS AND BRINGING
ANOTHER ROUND OF THUNDERSTORMS. THE GFS AND ECMWF A SIMILAR IN
TIMING AND POSITION OF THE LOW.

MONDAY WILL BE A FEW DEGREES WARMER THAN SUNDAY AND DRY DUE TO THE
EXIT OF THE UPPER LOW BEING REPLACED BY A SHORT WAVE RIDGE. THERE
AFTER 500MB HEIGHTS GRADUALLY FALL WITH A DRY PATTERN AND NORMAL
TEMPERATURES. IF THE ENSEMBLE MEAN IS FOLLOWED THIS PATTERN PERSISTS
INTO THE FIRST WEEK OF JUNE.

&&

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

&&

ALSO VISIT THE NWS ON THE WEB AT WEATHER.GOV/MEDFORD

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEDFORD OR
1255 PM PDT FRI MAY 27 2005

CAZ080>085-ORZ023>031-272300-
CENTRAL DOUGLAS COUNTY-CENTRAL SISKIYOU COUNTY-
EASTERN CURRY COUNTY AND JOSEPHINE COUNTY-
EASTERN DOUGLAS COUNTY FOOTHILLS-JACKSON COUNTY-
NORTH CENTRAL AND SOUTHEAST SISKIYOU COUNTY-
SISKIYOU MOUNTAINS AND SOUTHERN OREGON CASCADES-
SOUTH CENTRAL OREGON CASCADES-WESTERN SISKIYOU COUNTY-
1255 PM PDT FRI MAY 27 2005

...THUNDERSTORMS EXPECTED OVER PORTIONS OF SOUTHWEST OREGON AND
NORTHERN CALIFORNIA THIS AFTERNOON AND EVENING...

THUNDERSTORMS ARE EXPECTED OVER PORTIONS OF SOUTHWEST OREGON
AND NORTHERN CALIFORNIA THIS AFTERNOON AND EVENING. LOW PRESSURE OFF
THE SOUTHERN OREGON COAST IS PRODUCING A MOIST SOUTHERLY FLOW INTO
THE REGION. THIS COMBINED WITH CONTINUED NEAR-RECORD HEAT WILL ALLOW
THE AIRMASS TO BECOME MODERATELY UNSTABLE.

THUNDERSTORMS ARE EXPECTED TO START DEVELOPING BETWEEN NOON AND 2 PM
OVER THE CASCADES AND SISKIYOUS AND THEN SPREAD OVER MOST OF THE
FORECAST AREA. THE THUNDERSTORMS WILL CONTINUE INTO  THE EVENING.

STORM MOTION WILL BE SLOWLY NORTH AT 5 TO 10 MPH THEREFORE RAIN
COULD BE LOCALLY HEAVY IN A FEW SPOTS.

THE LOW PRESSURE SYSTEM WILL REACH THE COAST SATURDAY AND MOVE
INLAND THROUGH SATURDAY NIGHT. MORE SHOWERS AND THUNDERSTORMS ARE
LIKELY OVER THE REGION DURING THAT TIME.

FOR INFORMATION ON DEVELOPING THUNDERSTORMS...YOU CAN RETRIEVE
ABUNDANT INFORMATION INCLUDING SATELLITE AND RADAR IMAGERY ON OUR
WEB SITE AT WWW.WEATHER.GOV.

MO