Strong southwest winds occurred ahead of a moderate cold front.
Every event with a place to put it; 2 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS MFR wrote it up.
Strong southwest winds occurred ahead of a moderate cold front.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Medford, OR wrote its last area forecast discussion before the first event at Dec 31, 8:42 PM PST, 3 hours 56 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MEDFORD OR
842 PM PST THU DEC 31 2009
.DISCUSSION...THE MAIN LOW PRESSURE IS NOW CLOSING OFF NEAR 45N
135W. THIS HAS CAUSED THE COLD FRONT TO STALL OFFSHORE BUT WITH A
CONTINUING MOISTURE FEED INTO SOUTHWEST OREGON AND NORTHWEST
CALIFORNIA. THE COAST AND JOSEPHINE COUNTY HAVE RECEIVED PLENTY
OF RAIN AND EVEN THE MEDFORD AIRPORT PICKED UP JUST OVER A HALF
INCH OF RAIN. GUSTY WINDS ARE ALSO CONTINUING ALONG THE COAST WITH
SPOTTER JUST NORTH OF GOLD BEACH REPORTING GUST TO AROUND 90 MPH
EARLIER IN THE EVENING.
BY LATE THIS EVENING A 110KT JETSTREAM IS EXPECTED TO ROUND THE
BASE OF THE TROUGH AND HELP PUSH THE COLD FRONT TO THE EAST. THIS
WILL SHIFT THE MOISTURE AXIS MORE THE EAST WITH PRECIPITATION
INCREASING IN THE MOUNT SHASTA AREA WHILE COLDER AIR WILL BRING
SNOW LEVEL DOWN CLOSER TO 4000 FEET. HAVE EXTENDED THE WINTER WEATHER
ADVISORY FOR CAZ82 UNTIL 10 AM.
IN THE COASTAL WATERS LARGE SWELLS ARE MOVING INTO THE COASTAL
ZONE OVERNIGHT. COMBINED WITH INCREASING WAVE PERIOD...THESE
SWELLS ARE EXPECTED TO BREAK IN THE SURF ZONE IN THE 22 TO 25 FOOT
RANGE FROM AROUND NOON FRIDAY...AND COULD LAST INTO SATURDAY. THE
HIGH SURF ADVISORY CONTINUES AND WILL NEED TO BE EVALUATED IF THE
BREAKING WAVES WILL EXTEND INTO THE WARNING CATEGORY.
THE GRIDS WERE UPDATED AND SENT TO THE WEBPAGE.
&&
.AVIATION...AREAS OF MVFR CIGS AND VIS CAN BE EXPECTED INLAND AND
THE COAST ESPECIALLY IN HEAVIER SHOWERS WITH MOUNTAINS OBSCURED.
GUSTY SOUTH WINDS WILL CONTINUE OVERNIGHT AT THE COAST WITH WIND
SHEAR POSSIBLE.
&&
.MFR WATCHES/WARNINGS/ADVISORIES...
OR...HIGH WIND WARNING UNTIL 4 AM PST FRIDAY FOR ORZ021-ORZ022.
HIGH SURF ADVISORY FROM NOON FRIDAY TO NOON PST SATURDAY FOR
ORZ021-ORZ022.
HIGH WIND WARNING UNTIL 10 AM PST FRIDAY FOR ORZ031.
CA...WINTER WEATHER ADVISORY UNTIL 10 AM PST FRIDAY FOR CAZ082.
WIND ADVISORY UNTIL 10 AM PST FRIDAY FOR CAZ081.
PACIFIC COASTAL WATERS...GALE WARNING UNTIL 4 AM PST FRIDAY FOR
PZZ350-PZZ356-PZZ370-PZZ376.
HAZARDOUS SEAS WARNING UNTIL 4 AM PST SATURDAY FOR PZZ350-PZZ356-
PZZ370-PZZ376.
08/99/99HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MEDFORD OR 1217 PM PST THU DEC 31 2009 ORZ021-022-011200- SOUTH CENTRAL OREGON COAST-CURRY COUNTY COAST- 1217 PM PST THU DEC 31 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST OREGON. .DAY ONE...THIS AFTERNOON AND TONIGHT A HIGH WIND WARNING IS IN EFFECT UNTIL 6 PM PST. SEE WEATHER MESSAGE PDXNPWMFR...FOR SPECIFIC DETAILS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. CAZ081-011200- CENTRAL SISKIYOU COUNTY- 1217 PM PST THU DEC 31 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHERN CALIFORNIA. .DAY ONE...THIS AFTERNOON AND TONIGHT A HIGH WIND WARNING IS IN EFFECT UNTIL 7 PM PST. SEE WEATHER MESSAGE PDXNPWMFR...FOR SPECIFIC DETAILS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. ORZ031-011200- CENTRAL AND EASTERN LAKE COUNTY- 1217 PM PST THU DEC 31 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL OREGON. .DAY ONE...THIS AFTERNOON AND TONIGHT A HIGH WIND WARNING IS IN EFFECT UNTIL 7 PM PST. SEE WEATHER MESSAGE PDXNPWMFR...FOR SPECIFIC DETAILS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. CAZ082-011200- SOUTH CENTRAL SISKIYOU COUNTY- 1217 PM PST THU DEC 31 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHERN CALIFORNIA. .DAY ONE...THIS AFTERNOON AND TONIGHT A WINTER WEATHER ADVISORY FOR SNOW FOR ELEVATIONS ABOVE 4500 FEET IS IN EFFECT BEGINNING 4 PM PST. SEE WEATHER MESSAGE... PDXWSWMFR...FOR SPECIFIC DETAILS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THE WINTER WEATHER ADVISORY FOR SNOW FOR ELEVATIONS ABOVE 4500 FEET IS IN EFFECT UNTIL 4 AM PST FRIDAY. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. SUGDEN
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEDFORD OR
809 PM PST THU DEC 31 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0807 PM HEAVY RAIN 1 SSW OBRIEN 42.06N 123.71W
12/31/2009 M3.00 INCH JOSEPHINE OR TRAINED SPOTTER
RAINFALL AMOUNT FROM MIDNIGHT TO 8 PM. IT IS STILL
RAINING AT THE RATE OF ABOUT 0.2 INCH PER HOUR.
&&
BUNNAGPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEDFORD OR
911 PM PST THU DEC 31 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0849 PM HEAVY RAIN 6 ESE COOS BAY 43.33N 124.12W
12/31/2009 M1.53 INCH COOS OR TRAINED SPOTTER
24 HOUR TOTAL ENDING AT 2100 PST.
&&
STOCKTONPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEDFORD OR
1024 PM PST THU DEC 31 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1023 PM HEAVY RAIN 5 WSW WILDERVILLE 42.36N 123.56W
12/31/2009 M1.20 INCH JOSEPHINE OR TRAINED SPOTTER
12 HR RAINFALL FROM 10 AM TO 10 PM.
&&
BUNNAGThe national radar mosaic for the moment the first event began.
2 high wind. Local standard time, as filed.
The Summer Lake RAWS measured southwest winds of 31 mph with a peak gust of 58 mph at 01/0038 PST.
The Humbug Mountain ODOT station measured southwest winds of 35 mph with a peak gust of 58 mph at 01/0204 PST.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Oregon in 2010Every state in 2010This day in weather historyWarnings in Oregon, January 2010
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 200970, 200966.