514 
FXUS65 KRIW 010931
AFDRIW

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RIVERTON WY
231 AM MST WED NOV 1 2000

THE 07Z SFC CHART SHOWS LOW PRESSURE IN NW NEB. IR SAT LOOP SHOWS
WRAP AROUND MOVING SOUTH ACROSS THE ERN FA BUT TEMPS ARE STILL MILD
ENOUGH FOR -RA. HIGH PRESSURE WAS RIDGING INTO ID FROM THE PAC NW.
WATER VAPOR IMAGERY PLACES UPPER LOW CENTER EAST OF CYS.

THE MODELS LIFT UPPER LOW NE TODAY INTO SCTRL N DAK AND INTO ECTRL
N DAK TONIGHT. A BROAD TROUGH WILL REMAIN OVER THE FA THROUGH THU
AND MOVE EAST INTO THE NRN PLAINS THU NIGHT. THE DYNAMICS WITH THE
UPPER LOW WILL MOVE NE OF THE FA THIS AFTERNOON AS THICKNESSES AND
H7 TEMPS LOWER ENOUGH FOR SNOW IN THE NE FA. CURRENTLY -RA IS
OCCURRING THERE BUT SHOULD CHANGE OVER TO -SN LATER THIS AM AS
UPPER LOW MOVES CLOSER. THE SNOW ACCUMULATION PRODUCT INDICATES 1 TO
2 INCHES POSSIBLE OVER JOHNSON AND NATRONA CO. SNOW ACCUMULATION IN
CPR AMOUNTS TO ABOUT 1/2 INCH ON THE GRASS WHERE IT HAS BEEN SNOWING
SINCE TUE AFT. IT IS DOUBTFUL THAT SNOW WILL ACCUMULATE ENOUGH IN
JOHNSON CO TO CREATE ANY PROBLEMS AS WIND INCREASES TO VERY WINDY
CATEGORY THERE THIS AFTERNOON. THEREFORE DO NOT SEE A NEED FOR THE
BLIZZARD WARNING SCHEDULED FOR JOHNSON COUNTY TODAY.
ISOLATED LIGHT RAIN OR SNOW SHOWERS AND BREEZY CONDITIONS CAN BE
EXPECTED OVER WESTCENTRAL TODAY.  FOR TONIGHT...OCCASIONAL -SN SHOULD
TAPER OFF TO EVENING FLURRIES IN THE EAST WITH WINDY CONDITIONS
THROUGH THE EVENING. OTHERWISE...THE REST OF THE FA SHOULD BE
PTLY TO MSTLY CLDY. HIGH PRESSURE/SUBSIDENCE BUILDS INTO THE FA
THU/THU NIGHT. CLEARING SHOULD OCCUR THU NIGHT AS THE TROUGH
SHIFTS NE INTO THE NRN PLAINS. H7 TEMPS COOL ABOUT 6 DEGREES TODAY
AND ANOTHER DEGREE OR TWO ON THU. WILL LEAN TOWARD THE COOLER TEMP
GUIDANCE FOR MAX TEMPS WITH LOW TEMPS IN AGREEMENT. EXTENDED FCST
LOOKS IN LINE WITH NEW MRF.


.RIW...NONE

FS