Area Forecast Discussion
Issued by NWS Green Bay, WI

Home | Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
558
FXUS63 KGRB 262152
AFDGRB

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREEN BAY WI
452 PM CDT TUE APR 26 2016

UPDATED AVIATION PORTION FOR 00Z TAF ISSUANCE

.SHORT TERM...TONIGHT AND WEDNESDAY
ISSUED AT 226 PM CDT TUE APR 26 2016

CLOUDS WERE ALREADY DECREASING ACROSS THE FAR NORTH THIS
AFTERNOON. TEMPERATURES WERE MAINLY IN THE 40S...WITH A FEW 50S
ACROSS FAR NORTHEAST WISCONSIN DUE TO MORE SUNSHINE. THE CLOUDS
WILL BE ON THE DECREASE FROM NORTHEAST TO SOUTHWEST FOR THE
REMAINDER OF THE AFTERNOON INTO THIS EVENING.

MAIN CONCERN FOR TONIGHT WILL BE FROST POTENTIAL. THE BIG QUESTION
IS WILL WINDS DROP OFF ENOUGH FOR FROST TO FORM. HAVE ADDED SOME
PATCHY FROST SOUTH OF HIGHWAY 29 AND WEST OF THE FOX VALLEY. THERE
MAY BE A PERIOD AFTER MIDNIGHT WHERE LOW LYING OR SHELTERED AREAS
COULD SEE SOME PATCHY FROST.

A COOL AND DRY DAY IS EXPECTED ACROSS THE REGION. THE ONLY EXCEPTION
WILL BE ACROSS OUR FAR SOUTHWEST COUNTIES WHERE THERE IS A CHANCE
OF LIGHT RAIN TOWARDS SUNSET. CLOUDS WILL BE ON THE INCREASE
DURING THE DAY WITH SYSTEM APPROACHING FROM THE SOUTHWEST. HIGH
TEMPERATURES WILL BE SOME 5 TO 10 DEGREES BELOW NORMAL.

.LONG TERM...WEDNESDAY NIGHT THROUGH TUESDAY
ISSUED AT 226 PM CDT TUE APR 26 2016

A SOMEWHAT SPRING PATTERN OF UPPER LOWS DRIFTING ACROSS THE MID
SECTION OF THE COUNTRY IS IN FULL SWING FOR MUCH OF THIS PERIOD.
PERSISTENT TROUGHING OVER THE PAC COAST REGION WITH BROAD
TROUGHING FROM THE ROCKIES TO THE MIDDLE OF THE COUNTRY LEAVES THE
AREA WITH PERIODS OF SHOWERS AND COOLER TEMPERATURES. FOR THIS
REGION...THE AREA WILL BE IN A BATTLE ZONE WITH PASSING CLOSED OR
NEARLY CLOSED UPPER LOWS SYSTEMS TO THE SOUTH AND SOUTHWEST...AND
THE DRY COOLER NORTHEAST FLOW FROM THE HUDSON BAY TYPE HIGH
PRESSURE SYSTEM TO THE NORTH.

FIRST UPPER SYSTEM IS TRENDING A BIT SLOWER FOR ARRIVAL WEDNESDAY
NIGHT. THE NAM AND ECMWF ARE THE SLOWEST WITH PCPN ARRIVING MAINLY
AFTER MIDNIGHT VS THE QUICKER GFS. NEVERTHELESS ALL IN FAIR
AGREEMENT WITH PCPN SPREADING OVER MOST LOCATIONS BY THURSDAY WITH
THE EXCEPTION OF THE DRIER FAR NORTH AND NORTHEAST. WILL LEAVE A
MIX MENTION DUE TO COLD AIR IN PLACE...EVAP COOLING AND OVERNIGHT
ARRIVAL. THE GFS IS ALSO SLOWER WITH THE DEPARTURE OF THIS UPPER
SYSTEM AS WELL ON THURSDAY OR THURSDAY NIGHT.

DRY COOL AIR REGIME TO RETURN FRIDAY INTO SATURDAY WITH UPPER
HEIGHTS BUILDING AND CONTINUED NORTHEAST FLOW FROM THE CANADIAN
SURFACE HIGH PRESSURE SYSTEM.

NEXT IN A SERIES OF UPPER LOW SYSTEMS PROGGED TO TRACK ACROSS
PARTS OF THE GREAT LAKES REGION SATURDAY NIGHT INTO MONDAY. LATEST
MEDIUM RANGE DATA SUGGESTS A MORE SOUTHERN TRACK...WITH THE HIGH
PRESSURE REGION MORE DOMINATE ACROSS THE NORTH. LATER SHIFTS MAY
NEED TO LOWER POPS FROM NORTH TO SOUTH IF THIS TREND CONTINUES.
&&

.AVIATION...FOR 00Z TAF ISSUANCE
ISSUED AT 451 PM CDT TUE APR 26 2016

DRY AIR PUSHING DOWN FM THE NE SHOULD SCOUR THE LOW CLDS OUT OF
THE REMAINDER OF THE FCST AREA BY EARLY EVENING. GENERALLY GOOD
FLIGHT CONDITIONS ARE THEN EXPECTED FOR THE NEXT 24 HRS...THOUGH
SFC WINDS WILL PICK UP AND BECOME QUITE GUSTY IN C/E-C WI AGAIN BY
TOMORROW AFTN.
&&

.GRB WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

$$

SHORT TERM.....TDH
LONG TERM......ECKBERG
AVIATION.......SKOWRONSKI



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.