Tuesday, March 5, 2013

WX UNIT DISCUSSION 03/05/2013 2000Z

SRN WI AND NRN IL AND SURROUNDING AREAS:

FOR NWS OFFICIAL INFORMATION SEE WWW.WEATHER.GOV

...UPDATE FOR WEAKENING TRENDS...

WEAKENING TRENDS OBSERVED NOW ON THE SNOW ACRS SRN WI AND NRN IL EXCEPT FOR THE IMMIDIATE CHICAGO METRO AREA AND UP TOWARD MILWAUKEE.  RADAR RETURNS SEEM MORE ROBUST THAN ACTUAL INTENSITY OF SNOW AS LOW LVL WRM AIR ADVECTION WRAPPED IN AND CAUSED SOME LOW LEVEL FOG MIXED IN WITH SNOW REDUCING SFC VIS.   1/4 TO 3/4 MILS VSBLTY REPORTS MADE IT SEEM AS IF SNOW WAS HEAVIER BUT ACCUMS OVER 4 AND 5 INCHES ARE HARD TO FIND.  SHOULD SEE NWS REDUCE WARNINGS TO ADVISORY CRITERA OR EVEN CANCELLED ALTOGETHER AS ONLY AN INCH OR LESS CAN BE EXPECTED JUST ABOUT EVERYWHERE.  THERE MAY BE SOME ISOLATED BANDS THAT PRODUCED SOME ADDTL ACCUM BUT IT IS RAPIDLY WASHING OUT NOW.

UPSTREAM HIGH PRESSURE MOVES IN AND IT COULD GET COLD AROUND HERE THE NEXT COUPLE OF NIGHTS IF WE CAN CLEAR OUT THE OVERCAST.  NEXT SYSTEM SWINGS UP THROUGH THE CENTRAL PLAINS FOR FRIDAY AND SATURDAY AND IT LOOKS LIKE A PANHANDLE HOOK.  COULD BE A WARM RAINY SYSTEM WITH AMPLE MOISTURE AND CAUSE SOME FLOODING CONCERNS COUPLED WITH MELTING SNOW. 

SPRING IS ALMOST IN THE AIR NOW.

STORM CHASER DAVID CASPER, WX UNIT   Current Regional Radar (REFRESH FOR UPDATE)...