Area Forecast Discussion
Issued by NWS State College, PA

Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary Off
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
-- Remove Highlighting --
-- Discussion containing changed information from previous version are highlighted. --
000 FXUS61 KCTP 291601 AFDCTP AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE STATE COLLEGE PA 1201 PM EDT SUN MAR 29 2015 .SYNOPSIS...
-- Changed Discussion --
A RIDGE OF HIGH PRESSURE...BRINGING SUNSHINE TODAY...WILL MOVE OFF TO THE SOUTHEAST BY TONIGHT. A COLD FRONT WILL MOVE FROM THE OHIO VALLEY ACROSS CENTRAL PENNSYLYVANIA TONIGHT INTO EARLY MONDAY. THIS WILL BE FOLLOWED BY ANOTHER DISTURBANCE THAT WILL BRING THE CHANCE FOR MORE UNSETTLED WEATHER TUESDAY. A SLOW MODERATION IN TEMPERATURES IS EXPECTED FOR THE LATTER HALF OF THE WEEK AHEAD.
-- End Changed Discussion --
&& .NEAR TERM /THROUGH TONIGHT/...
-- Changed Discussion --
STRONG RIDGE OF HIGH PRES BRINGING SUNNY SKIES. TEMPERATURES ARE RESPONDING TO THE MARCH SUN AS PREDICTED. SO IT WILL FEEL MILDER THAN YESTERDAY BUT STILL BELOW NORMAL FOR THIS TIME OF YEAR. RIDGE IS FCST TO SLIDE TO THE SE HEADING INTO THIS EVENING. USING SATELLITE TO TIME THE HIGH CLOUDS TO SPREAD IN LOOKS LIKE IT WILL BE AFTER 21Z. A COLD FRONT APPROACHING FROM THE MIDWEST WILL BRING A CHANCE FOR SNOW SHOWERS INTO WESTERN AREAS BY MIDNIGHT. SHORT RANGE GUIDANCE FAVORS MY WESTERN HIGHLANDS WITH THE BEST CHANCE FOR PRECIP...WITH POPS DROPPING OFF OVER CENTRAL AND EASTERN AREAS DUE TO DOWNSLOPING FLOW. ENSEMBLE QPF OF .20" OR LESS LOOKS REASONABLE WITH ANY LIGHT SNOW ACCUMS BEING MAINLY CONFINED TO THE WEST AND NORTH. WARM SKIN TEMPS FOR THE EARLY PART OF THE OVERNIGHT SHOULD LIMIT AMOUNTS ELSEWHERE. OVERNIGHT LOWS LOOK TO BOTTOM OUT A COUPLE OF DEG EITHER SIDE OF 30.
-- End Changed Discussion --
&& .SHORT TERM /MONDAY/... THE FRONT WILL CLEAR SERN AREAS BY EARLY AFTERNOON ALLOWING FOR THE DEVELOPMENT OF AN ALL TOO FAMILIAR BLUSTERY AND CHILLY WESTERLY FLOW WITH THE USUAL POST FRONTAL STRATOCU CEILINGS AND SCATTERED RAIN/SNOW SHOWERS THAT USUALLY FAVOR WESTERN AND NORTHER HIGHER ELEVATIONS. HIGHS FROM THE MID 30S NW WILL RUN SOME 10-15DEG BELOW NORMAL. MILDER READINGS OVER THE SE WILL ACTUALLY BE NOT TOO FAR FROM NORMAL FOR LATE MARCH. && .LONG TERM /MONDAY NIGHT THROUGH SATURDAY/... THE SYSTEM ON MONDAY WILL BE FOLLOWED IN QUICK SUCCESSION BY ANOTHER SHORTWAVE FOR TUESDAY. THE OPERATIONAL GFS/ECMWF/NAM ALL HAVE VERY DIFFERENT SOLUTIONS FOR THE SURFACE LOW WITH THE NAM BEING STRONGEST AND FURTHEST NORTH...AND THE ECMWF BEING WEAKEST AND MOST SOUTH. I USED A BLEND OF MODEL POPS AND GEFS/SREF 850 TEMPS TO CONFINE SNOW CHANCES TO AREAS NORTH OF I-80. I ALSO DOWNPLAYED SNOW ACCUMS A BIT GIVEN THE EXPECTED HIGH TEMPS IN THE MID TO UPPER 30S. IF THE ECMWF SOLUTION PANS OUT THERE WILL NOT BE MUCH PRECIP TO SPEAK OF AT ALL. NAEFSBC CONTINUES TO SHOW A BREAK DOWN IN THE EXTREME COLD PATTERN AS THE WEEK PROGRESSES...ERODING THE WRN NOAM RIDGE AND EVEN SHOWING A BRIEF SURGE IN UPPER HEIGHTS AND TEMPS OVER THE NERN US ALONG ABOUT THURSDAY...AHEAD OF ANOTHER COLD FRONT THAT SHOULD PASS LATE IN THE WEEK. HOWEVER THE PARENT UPPER LOW IS MADE TO REMAIN OVER HUDSON`S BAY AND EVEN DROPS SOUTH IN TIME...REINFORCING THE TROUGHING OVER THE NRN US BY WEEKS END. THIS WOULD FAVOR A RETURN OF TEMPS NEAR OR PERHAPS A BIT BELOW NORMAL...BUT NOT THE EXTREME COLD WE HAVE BEEN EXPERIENCING. && .AVIATION /16Z SUNDAY THROUGH THURSDAY/... MAIN CHANGE FOR 12Z TAFS WAS TO ADD A LINE FOR SNOW SHOWERS ACROSS THE CENTRAL AND EASTERN SITES. ALREADY HAD SNOW SHOWERS IN THE WEST. A DECENT DAY IN STORE FOR THE AREA TODAY...AS HIGH PRESSURE BUILDS INTO THE STATE. LOOKING AT SUNNY SKIES WITH VFR CONDITIONS. SOME SNOW SHOWERS LATER TONIGHT...AS A FAST MOVING COLD FRONT MOVES SE FROM THE UPPER GREAT LAKES AREA. A FEW RAIN AND SNOW SHOWERS FOR MONDAY...MAINLY ACROSS THE NORTH AND WEST. SOME RAIN AND SNOW SHOWERS FOR TUE INTO EARLY WED...AS LOW DROPS SE FROM THE CENTRAL PLAINS OF CANADA. OUTLOOK... MON...CHANCE OF LIGHT RAIN /LIGHT SNOW EARLY/ ACROSS THE WESTERN HALF WITH MVFR REDUCTIONS. VFR SE. TUE...CHANCE OF LIGHT SNOW/RAIN...MAINLY ACROSS THE NW HALF WITH MVFR REDUCTIONS. VFR SE. WED-THU MORNING...MAINLY VFR...AS HIGH PRESSURE BUILDS ACROSS THE AREA. THUR AFTERNOON-NIGHT...A GRADUALLY DECREASE TO MVFR WITH SCATTERED RAIN SHOWERS...AS A COLD FRONT MOVES EASTWARD. && .CTP WATCHES/WARNINGS/ADVISORIES... NONE. && $$ SYNOPSIS...WATSON NEAR TERM...WATSON/LA CORTE SHORT TERM...LA CORTE LONG TERM...LA CORTE/TYBURSKI AVIATION...MARTIN

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