[MCD] SWOMCD

[MCD at goshenarc.org]

ACUS11 KWNS 250036
SWOMCD
SPC MCD 250035 
TXZ000-250630-

MESOSCALE DISCUSSION 2573
NWS STORM PREDICTION CENTER NORMAN OK
0635 PM CST FRI DEC 24 2004

AREAS AFFECTED...DEEP SOUTH TX

CONCERNING...WINTER MIXED PRECIPITATION 

VALID 250035Z - 250630Z

A MIXTURE OF SLEET AND SNOW WILL CONTINUE TO INCREASE IN COVERAGE
AND INTENSITY THROUGH THE EVENING HOURS.  HRLY SNOWFALL RATES AROUND
0.50 IN/HR ARE EXPECTED.

BROAD AREA OF ISENTROPIC LIFT CONTINUES WITH CONVECTIVE SHOWERS
BREAKING OUT.  00Z CRP SOUNDING CONFIRMS CONVECTIVE INSTABILITY
ROOTED NEAR 700 MB WITH SUB-ZERO TEMPERATURES BELOW SO THUNDER
SLEET/SNOW WILL CONTINUE.

00Z CRP AND BRO SOUNDINGS SHOW WARM LAYER ALOFT NEAR 700 MB...BUT
THIS LAYER WILL COOL THROUGH THE EVENING AS TROUGH APPROACHES FROM
WEST.  LOW TO MID LEVEL FRONTOGENETICAL FORCING WILL ALSO INCREASE
THROUGH THE EVENING AND WILL HELP ORGANIZE PRECIPITATION INTO SW-NE
ORIENTED BANDS. THE HEAVIEST RATES ARE EXPECTED TO BE FROM 02-05Z
NRN AND WRN AREAS...AND FROM 05-09Z SERN AREAS INCLUDING BRO.

..JEWELL.. 12/25/2004

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

...NOTICE...
SPC WINTER WEATHER MESOSCALE DISCUSSIONS WILL BE ISSUED ON A 
SCHEDULED BASIS...FOUR TIMES A DAY...BETWEEN 00-01 UTC...
06-07 UTC...12-13 UTC...AND 18-19 UTC AS SIGNIFICANT SHORT
RANGE WINTER WEATHER EVENTS UNFOLD.  THIS SCHEDULE WILL BE
USED FROM DECEMBER 1 THROUGH FEBRUARY 28.

ATTN...WFO...CRP...EWX...BRO...

27039927 27399917 28039903 28719825 28749728 28309661
27429730 26769744 25939718 25969761 26079819 26389892 

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