027
ACUS11 KWNS 090259
SWOMCD
SPC MCD 090259
NDZ000-MTZ000-090900-
MESOSCALE DISCUSSION 2252
NWS STORM PREDICTION CENTER NORMAN OK
0859 PM CST SUN DEC 08 2024
AREAS AFFECTED...EASTERN MONTANA AND FAR WESTERN NORTH DAKOTA
CONCERNING...BLIZZARD
VALID 090259Z - 090900Z
SUMMARY...SPORADIC BLIZZARD CONDITIONS ARE LIKELY THROUGH THE
OVERNIGHT HOURS ACROSS EASTERN MONTANA AND INTO FAR WESTERN NORTH
DAKOTA. CONDITIONS ARE EXPECTED TO DETERIORATE STEADILY BETWEEN
06-12 UTC AS LIGHT TO MODERATE SNOW FALL RATES COINCIDE WITH 30-35
MPH WINDS.
DISCUSSION...TEMPERATURES ACROSS EASTERN MT HAVE BEEN STEADILY
FALLING TO BELOW FREEZING AS A COLD FRONT BEGINS TO PUSH SOUTH INTO
THE NORTHERN PLAINS. THIS HAS BEEN PROMOTING A CHANGE OVER FROM A
WINTRY MIX TO PREDOMINANTLY SNOW, WHICH IS EXPECTED TO GRADUALLY
SPREAD SOUTHEAST THROUGH EARLY MONDAY MORNING AS A SURFACE LOW
TRANSLATES EAST ALONG THE INTERNATIONAL BORDER. SUSTAINED GRADIENT
WINDS BETWEEN 30-35 MPH ARE BEING OBSERVED WITH GUSTS UPWARDS OF
40-45 MPH. BLOWING SNOW MODEL OUTPUT SUGGESTS THAT WITH LIGHT TO
MODERATE SNOW FALL RATES (0.25-0.5 IN/HOUR) AND TEMPERATURES IN THE
LOW 30S, THESE SUSTAINED WINDS WILL RESULT IN SPORADIC/TRANSIENT
BLIZZARD CONDITIONS WITH MORE SIGNIFICANT/WIDESPREAD VISIBILITY
REDUCTIONS LIKELY WHERE GUSTS EXCEED 40 MPH. EARLY INDICATIONS OF
THIS TREND HAVE ALREADY BEEN NOTED ACROSS NORTHEAST MT WHERE
PERIODIC VISIBILITY REDUCTIONS DOWN TO 1/2 MILE HAVE BEEN COINCIDENT
WITH GUSTS OVER 40 MPH. SUCH CONDITIONS SHOULD BECOME MORE COMMON
ACROSS EASTERN MT/FAR WESTERN ND AS THE SURFACE FREEZING LINE PUSHES
SOUTH AND SUPPORTS SNOW AS THE PRIMARY PRECIPITATION TYPE. RECENT
HRRR SOLUTIONS SUGGEST SPORADIC BLIZZARD CONDITIONS WILL BEGIN TO
IMPACT THE I-94 CORRIDOR AS EARLY AS 05-06 UTC.
..MOORE.. 12/09/2024
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT
ATTN...WFO...BIS...BYZ...GGW...
LAT...LON 48760638 48770564 48700492 48540444 47410350 46950331
46500343 46100377 45860421 45840482 45930550 46150620
46550671 46950713 47420737 47950743 48230730 48590696
48760638
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