MESO: Mesoscale Discussion 2464

ACUS11 KWNS 140030
SWOMCD
SPC MCD 140029
NDZ000-SDZ000-NEZ000-MTZ000-WYZ000-140430-

MESOSCALE DISCUSSION 2464
NWS STORM PREDICTION CENTER NORMAN OK
0629 PM CST SAT DEC 13 2008

AREAS AFFECTED...ERN WY...SERN MT...WRN/CNTRL DAKOTAS...FAR NWRN NEB
PANHANDLE

CONCERNING...BLIZZARD

VALID 140029Z - 140430Z

OCCASIONAL BLIZZARD CONDITIONS WILL GRADUALLY SHIFT E/SWD ACROSS THE
NRN PLAINS THIS EVENING. FREQUENT WIND GUSTS AROUND 25-35 KT ALONG
WITH AREAS OF LIGHT TO MODERATE SNOW FALL WILL RESULT IN NEAR-ZERO
VISIBILITIES AT TIMES.

00Z SUBJECTIVE SURFACE ANALYSIS PLACED A 987 MB CYCLONE OVER THE NEB
PANHANDLE WITH ARCTIC FRONT DRAPED WWD ACROSS THE NRN ROCKIES. A
VERY TIGHT SURFACE PRESSURE GRADIENT /UP TO NEAR 40 MB BETWEEN
CYCLONE AND INTERNATIONAL BORDER IN N-CNTRL MT/ HAS MAINTAINED
STRONG WINDS...AND LED TO NUMEROUS REPORTED VISIBILITIES APPROACHING
ZERO DURING THE AFTERNOON ACROSS ERN MT/NERN WY. LATEST MODEL
GUIDANCE SUGGEST ONLY A SLOW EWD PROPAGATION OF THE SURFACE LOW
CENTER WILL OCCUR THIS EVENING...AWAITING MORE SUBSTANTIAL MID-LEVEL
HEIGHT FALLS OVERNIGHT WITH EVENTUAL EJECTION OF GREAT BASIN SHORT
WAVE TROUGH. GIVEN NEARLY STEADY STATE LOW-LEVEL KINEMATIC
FLOW...SURFACE WIND GUSTS OF 25-35 KT SHOULD REMAIN COMMON WITH A
GRADUAL E/SWD SHIFT IN AREAL EXTENT.

..GRAMS.. 12/14/2008

...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...ABR...BIS...LBF...UNR...CYS...BYZ...GGW...RIW...

LAT...LON 44480079 43820171 43160256 42290357 41970451 42410560
43480678 44410701 45690670 46830575 47800445 48100272
48140115 47870033 47229955 46359977 45440018 44480079

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
To unsubscribe from WX-STORM send e-mail to LISTSERV@LISTSERV.ILLINOIS.EDU with
"unsub wx-storm" in the body of your message. For more information write cnovy@cox.net.