SWOMCD
SPC MCD 020546
ORZ000-WAZ000-021045-
MESOSCALE DISCUSSION 0001
NWS STORM PREDICTION CENTER NORMAN OK
1146 PM CST THU JAN 01 2009
AREAS AFFECTED...PTNS CNTRL/WRN OR
CONCERNING...HEAVY SNOW
VALID 020546Z - 021045Z
SNOWFALL RATES OF 1 TO 2 INCHES PER HOUR IN NRN OREGON CASCADES WILL
SPREAD SOUTHWARD THROUGH THE REMAINDER OF THE OREGON CASCADE RANGE
THROUGH THE OVERNIGHT HOURS AS SNOW ELEVATIONS DROP WITH PASSAGE OF
COLD FRONT.
STRONG UPPER SYSTEM FROM ERN PACIFIC IS JUST APPROACHING WESTERN
WASHINGTON/OREGON. INITIALLY...EXCEPT AT THE HIGHER
ELEVATIONS...ABOVE 6000 FT...THE PRECIPITATION WILL BE MAINLY RAIN.
BY 09 UTC...THE FORECAST TEMPERATURES INDICATE RATHER DRAMATIC
COOLING WITH SNOW LEVELS DROPPING THE REMAINDER OF THE NIGHT. AS
THE SNOW LEVELS DROP...THERE WILL POSSIBLY BE SEVERAL HOURS OF 2
INCH PER HOUR SNOWFALL RATES...TAPERING OFF TO 1 INCH PER HOUR IN
THE LOWER ELEVATIONS AS MOST OF THE SIGNIFICANT SNOW ENDS ACROSS THE
AREA BY 12 UTC.
..BOTHWELL.. 01/02/2009
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
...NOTICE...
SPC WINTER WEATHER MESOSCALE DISCUSSIONS WILL BE ISSUED ON A
SCHEDULED BASIS FROM DECEMBER 1 THROUGH FEBRUARY 28...FOUR
TIMES A DAY...AROUND 00 UTC...06 UTC...12 UTC...AND 18 UTC
FOR SIGNIFICANT SHORT RANGE WINTER WEATHER EVENTS.
ATTN...WFO...PDT...MFR...PQR...
LAT...LON 42682208 43182231 43902254 44402257 45582263 45672226
45732181 45132107 44792091 44182065 43742059 42942053
42622056 42422081 42362127 42682208
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