AREA FORECAST DISCUSSION
NWS GREEN BAY WI
AFDGRB 300 AM CST TUE MAR 13 2001
WEATHER PATTERN EXPECTED TO BE MORE OF THE SAME...WITH LOTS OF WEATHER
SYSTEMS COMING OVER WRN RIDGE THEN DIVING SE ACROSS THE NRN PLAINS INTO
THE MIDWEST. NW UPPER FLOW ACROSS THE AREA TODAY AND A COUPLE LITTLE JET
STREAKS SHOULD TEAM UP TO PRODUCE SNOW SHOWERS WITH LITTLE OR NO
ACCUMULATIONS. HIGH TEMPS SHOULD BE PRETTY MUCH BETWEEN 30 AND 35 WITH
LOW LEVEL COLD ADVECTION MOST OF THE DAY. 850 MB WINDS FCST TO RANGE
FROM 20 TO 40 KNOTS...SO WILL ADD BLUSTERY TO FORECAST. WOULD BE WINDY
IF WE HAD NO CLOUDS AND SOME SURFACE HEATING. TONIGHT COLD ADVECTION
ALOFT AND WAA IN LOW LEVELS SHOULD DESTABILIZE THE ATMOSPHERE...BUT
FAIRLY STRONG SUBSIDENCE IN LEFT ENTRANCE REGION OF UPPER JET AND DRY
ATMOSPHERE SHOULD KEEP CHANCE OF SNOW MINIMAL. NEXT UPPER SYSTEM IN THE
ERN PACIFIC EXPECTED TO MOVE ACROSS THE NRN ROCKIES TONIGHT AND BE IN
THE NRN PLAINS WEDNESDAY. AVN IS FURTHER NORTH AND MOST VIGOROUS WITH
UPPER LOW...WHILE ETA AND NGM FURTHER SOUTH. 06UTC ETA IS A COMPROMISE.
WILL KEEP FORECAST FOR THURSDAY AS IS. THINK IT IS WISE TO WAIT UNTIL
UPPER JET ENERGY IS OVER THE CONTINENT (AND BETTER ANALYZED BY
RADIOSONDE AND AIRCRAFT REPORTS) BEFORE PUTTING TOO MUCH FAITH IN ANY
ONE OF THE MODELS.
.GRB...NONE.
RDM
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