Aikyam-Lab/Synoptic-Bench huggingface dataset:
/ISSUED 350 PM CDT SUN OCT 4 2015/ LATEST SURFACE ANALYSIS SHOWED A 1004MB LOW OFF THE COAST OF SOUTH CAROLINA AND AN ASSOCIATED PESKY UPPER LEVEL LOW OVER SOUTHEAST GEORGIA. GUIDANCE HAS NOT BEEN GOLDEN AS HIGH TEMPS REMAINED COOLER THAN FORECAST YESTERDAY AND TODAY. A WEAK UPPER LEVEL RIDGE WILL DEVELOP OVER THE PLAINS AND MISSISSIPPI VALLEY MONDAY NIGHT.
449 AM EDT MON OCT 5 2015 HIGH PRESSURE WILL PROVIDE FAIR AND DRY WEATHER INTO THE MID WEEK.
DID DECREASE CHANCES TO SLIGHT WITH PRECIPITATION MORE ISOLATED THE PAST FEW SCANS AS DRY AIR STARTS TO WORK INTO WESTERN NORTH DAKOTA BEHIND THE COLD FRONT. ON MONDAY A BROAD H500 RIDGE WILL INFLUENCE THE WEATHER ACROSS THE STATE GIVING DRY WEATHER AND GRADUALLY CLEARING SKIES.
336 AM PDT MON OCT 5 2015 A LOW PRESSURE SYSTEM OVER SOUTHERN CALIFORNIA WILL MOVE SLOWLY EASTWARD THROUGH TUESDAY.
140 AM EDT MON OCT 5 2015 A LARGE AREA OF HIGH PRESSURE ANCHORED OVER EASTERN CANADA WILL CONTINUE TO PROVIDE SEASONABLE TEMPERATURES AND DRY WEATHER TO THE NORTH COUNTRY. TEMPS HAVE FALLEN TO THE LOWER 30S IN MANY SPOTS WITH CALM WINDS AND CLEAR SKIES IN SHELTERED LOCATIONS.
ANALYSIS OF THE 07Z MSL PLOT SHOWED A TROUGH IN SOUTH DAKOTA AND SOUTHEAST WYOMING. WIND WILL BECOME MORE SOUTHERLY AS THE LEE SIDE TROUGH DEVELOPS. FOCUS THIS MORNING IS A MID WEEK MINOR SYSTEM THEN A RIDGE AND A VERY WARM WEEKEND. CLOSED UPPER LEVEL LOW WILL DRIFT ACROSS THE ARIZONA AND N MEXICO DURING THE MIDDLE PART OF THE WEEK. MEANWHILE A BROAD TROUGH WILL CROSS THE NORTHERN/CENTRAL PLAINS.
108 AM EDT MON OCT 5 2015 HIGH PRESSURE OVER QUEBEC WILL SLIDE SOUTHEAST OFF THE NEW ENGLAND COAST. ANOTHER LARGE AREA OF CANADIAN HIGH PRESSURE WILL MOVE OUT OF ALBERTA INTO THE CENTRAL GREAT LAKES MID WEEK. A BIT COOLER IN THE NORMAL COOL SPOTS. WARMER WHERE THE CLOUDS AND/OR BREEZE ARE MORE PREVALENT. WEAK UPPER RIDGE HOLDS FAST THROUGH EARLY PART OF WORK WEEK. CANADIAN HIGH PRESSURE MOVES INTO MID MISSISSIPPI VALLEY BY DAYBREAK TUESDAY.
1245 AM CDT MON OCT 5 2015 HIGH PRESSURE OVER THE AREA CONTINUES WITH NORTH WINDS.
142 AM EDT MON OCT 5 2015 A LARGE AREA OF HIGH PRESSURE OVER SOUTHERN QUEBEC WILL DRIFT SOUTH OVER THE NEXT SEVERAL DAYS AND SLOWLY WEAKEN. WITH A MAINLY DRY COLD FRONT IN THE MIDDLE OF THE WEEK.
AN UPPER LOW HAS EXITED SOUTH OF OUR AREA TODAY. AN UPPER LEVEL RIDGE WILL DEVELOP OVER CALIFORNIA EARLY IN THE WEEK AND THEN STRENGTHEN LATE IN THE WEEK.
220 AM EDT MON OCT 5 2015 A LARGE AREA OF HIGH PRESSURE CENTERED OVER NORTHERN MAINE WILL RIDGE INTO THE MID ATLANTIC REGION AS IT DRIFTS SOUTH OVER THE NEXT SEVERAL DAYS. WITH A MAINLY DRY COLD FRONT IN THE MIDDLE OF THE WEEK.
MOSTLY CLEAR SKIES AND DRY CONDITIONS WILL CONTINUE THROUGH MONDAY AS HIGH PRESSURE PERSISTS ALOFT. AN UPPER LEVEL RIDGE WILL BUILD OVERHEAD AND KEEP CONDITIONS WARM. A LARGE MEAN TROUGH WILL DEVELOP ACROSS THE NORTH PACIFIC THROUGH THE WEEK AND GRADUALLY DIG. HOWEVER BY THE WEEKEND THE UPPER RIDGE MAY WEAKEN ENOUGH TO ALLOW FOR LIGHT RAIN TO REACH THE REDWOOD COAST. HIGH PRESSURE OFFSHORE WILL INDUCE A FLOW REVERSAL ALONG THE COAST TODAY. THESE SOUTHERLY WINDS WILL EXTEND OUT ABOUT 15 TO 25 NM FROM THE COAST WITH THE HIGHEST WINDS AROUND CAPE MENDOCINO.
THE UPPER LOW THAT HAS BEEN SITTING ACROSS OUR REGION THROUGH THE WEEKEND. BRINGING CLOUDY SKIES AND COOLER TEMPERATURES. THIS ADDITIONAL INSOLATION SHOULD RESULT IN HIGHS IN THE LOWER 80S THIS AFTERNOON WHILE TEMPERATURES WILL BE A FEW DEGREES WARMER ON TUESDAY AS CLOUD COVER SHOULD BE EVEN LESS. AT MIDWEEK WE WILL HAVE SHORT WAVE RIDGING OVER THE MS VALLEY REGION.
AN AREA OF LOW PRESSURE LIFTING NEWD ACROSS THE NORTHERN PLAINS IS GENERATING SOME ISOLATED TO SCATTERED SHOWERS OVER THIS CWA. TEMPERATURES RANGE FROM THE MID 50S ACROSS CENTRAL SOUTH DAKOTA TO THE LOWER 60S OVER WEST CENTRAL MINNESOTA. ONCE THE PVA ASSOCIATED WITH THIS AREA OF LOW PRESSURE SHIFTS OFF INTO NODAK AND MINNESOTA. AND KEEP THEM FROM FALLING MUCH PAST THE LOW TO MID 40S. TEMPERATURES SHOULD BE WARMER MONDAY THAN THEY ARE TODAY. AND PROGRESSIVELY EVEN WARMER ON TUESDAY.
THE LOW PRESSURE SYSTEM OVER CALIFORNIA THIS AFTERNOON WILL PROPAGATE EASTWARD MONDAY MORNING.
POSSIBLY A STRAY SHOWER IN THE HIGHER TERRAIN DUE TO WEAK CONVERGENCE. WHICH IS PROBABLY WHY THE 05/00Z MOS CAME IN COOLER THAN PREVIOUS MAX TEMP FORECAST.
356 AM EDT MON OCT 5 2015 LOW PRESSURE OFF THE GEORGIA COAST WILL DRIFT OUT TO SEA THROUGH MIDWEEK. HIGH PRESSURE WILL BUILD INTO THE MID ATLANTIC REGION.
414 AM CDT MON OCT 5 2015 MOST MODELS ARE UNDERESTIMATING PERSISTENCE/STRENGTH OF LIFT ASSOCIATED WITH S/WV TROUGH LIFTING NORTH ACROSS WEST TEXAS AND EASTERN NEW MEXICO.
1035 PM PDT SUN OCT 4 2015 Quieter weather is expected tonight through Tuesday, with mostly clear skies as high pressure builds over the area. The ridge weakens mid week with a chance of light rain entering the region. /Pelatti 06Z TAFS: VFR conditions continue under clear skies and light terrain driven winds as high pressure remains over the area.
633 AM EDT MON OCT 5 2015 THE NEXT RAIN CHANCE FOR THE UPPER OHIO VALLEY REGION WILL COME WITH A LATE WEEK COLD FRONT. HIGH PRESSURE WILL THUS PREDOMINATE TODAY WITH INSOLATION SUPPORTING HIGHS A COUPLE DEGREES ABOVE THE AVERAGES. DRY WEATHER CAN BE EXPECTED THROUGH MIDWEEK ALTHOUGH A WEAK COLD FRONT IS PROGGED FOR A TUESDAY PASSAGE.
630 AM EDT MON OCT 5 2015 HIGH PRESSURE WILL PROVIDE FAIR AND DRY WEATHER INTO THE MID WEEK.
FORECAST - THE MID AND UPPER LEVEL LOW WILL CONTINUE TO SWING EAST AND NORTHEAST OFF OF FLORIDA TODAY. AND OPEN UP INTO A TROUGH TONIGHT AND TUESDAY WITH THE AXIS ALIGNED OVER THE CENTRAL BAHAMAS.
358 AM EDT MON OCT 5 2015 A LARGE AREA OF HIGH PRESSURE ANCHORED OVER EASTERN CANADA WILL CONTINUE TO PROVIDE SEASONABLE TEMPERATURES AND DRY WEATHER TO THE NORTH COUNTRY TODAY AND TOMORROW.
THIS EVENING THROUGH MONDAY NIGHT UPPER LEVEL ANALYSIS HAS HIGHLY AMPLIFIED FLOW WITH DEEP UPPER LOWS OVER THE SOUTHWEST AND SOUTHEAST CONUS. AND A WEAK RIDGE OVER THE SOUTHERN AND CENTRAL PLAINS. WEAK TROF IS SLOWLY PUSHING EAST ACROSS THE NORTHERN HIGH PLAINS. SOME 50S IN THE HIGHER BLACK HILLS.
400 AM MDT MON OCT 5 2015 A WEAK SOUTHERLY FLOW WILL BE OVER THE REGION TODAY AHEAD OF A DEVELOPING TROUGH MOVING INTO SOUTHERN CALIFORNIA. IN THE LOW 70S. THIS COUPLED WITH THE WARMER TEMPERATURES SHOULD HELP TO INITIATE ADDITIONAL SHOWERS ALONG WITH SOME THUNDERSTORMS THIS AFTERNOON. THE BEST CHC OF PCPN WL BE FROM THE URBAN CORRIDOR WEST INTO THE HIGH COUNTRY. A NEARLY VERTICALLY STACKED CYCLONE LUMBERING ACROSS SOUTHERN CALIFORNIA THIS MORNING TO PROGGED TO HAVE MOVED TO JUST OVER NORTHWEST ARIZONA BY MIDDAY TUE.
The region is currently located between two upper level lows, one across the southeastern U. The upper level low across the southeast will kick off to the east early this week, as the upper level low across the southwest very slowly pushes to the southeast through mid week.
538 AM EDT MON OCT 5 2015 MOISTURE WRAPPING AROUND LOW PRESSURE OFF THE SOUTHEAST COAST WILL CONTINUE TO MOVE INTO THE FORECAST AREA TODAY.
ENOUGH WEAK WAA AND SOME ADDED LIFT WITH PASSAGE OF SUBTLE 700 MB TROUGH TO GENERATE SCATTERED POCKETS OF VERY LIGHT SHOWERS/DRIZZLE ALONG A LINE FROM SOUTH OF LUDINGTON MI THOUGH MILWAUKEE AND WAUKESHA TO JANESVILLE. WITH GUIDANCE A BIT TOO WARM AS FORECAST SOUNDINGS SHOW LITTLE CHANCE OF MIXING UP TO 925 MB TEMPERATURES THAT ARE 3C TO 5C WARMER THAN YESTERDAY.
216 AM PDT MON OCT 5 2015 Quieter weather is expected through Tuesday, with mostly clear skies as high pressure builds over the area. The ridge weakens mid week with a chance of light rain entering the region. Today through Tuesday: Expect generally clear skies/dry weather and light winds under an upper ridge that begins to break down by Tues. Concerning Tues and the flattening of the ridge, the approaching frontal system and vort max that moves into NW Wa should only produce some mid and high clouds. Low temps could reach freezing across the sheltered valleys of Nrn Wa and N Idaho.
400 AM CDT MON OCT 5 2015 UPPER LEVEL LOW OFF THE EAST COAST IS FORECAST TO FILL AND CONTINUE MOVING EASTWARD OVER THE NEXT 24-48 HOURS. THE MID-WEEK PERIOD WILL FEATURE AN UPPER LEVEL RIDGE ACROSS THE SOUTHEAST STATES.
UNCLEAR HOW FAR EAST PRECIPITATION WILL MAKE IT GIVEN RIDGE AXIS ALSO ACROSS THE FLINT HILLS. INITIALIZATION TEMPERATURES LIKELY A GOOD FIRST GUESS GIVEN UNCERTAINTY IN TIMING OF COLD FRONT PASSAGE. PRECIPITATION WILL BE LIMITED TO WHAT OCCURS IN THE VICINITY OF OF COLD FRONT.
405 AM EDT MON OCT 5 2015 A LARGE AREA OF HIGH PRESSURE, STRETCHING FROM THE GREAT LAKES REGION, ACROSS THE NORTHEAST, WILL DOMINATE OUR WEATHER, FOR MUCH OF THIS WEEK.
344 AM EDT MON OCT 5 2015 A LARGE AREA OF HIGH PRESSURE ANCHORED OVER EASTERN CANADA WILL CONTINUE TO PROVIDE SEASONABLE TEMPERATURES AND DRY WEATHER TO THE NORTH COUNTRY. TEMPS HAVE FALLEN TO THE LOWER 30S IN MANY SPOTS WITH CALM WINDS AND CLEAR SKIES IN SHELTERED LOCATIONS.
301 AM EDT MON OCT 5 2015 A LARGE HIGH PRESSURE OVER THE GREAT LAKES WILL REMAIN IN CONTROL OF OUR WEATHER BRINGING DRY WEATHER AND MAINLY CLEAR SKIES THROUGH AT LEAST MID WEEK. SOME OF OUR NORMALLY COLDER SECTIONS OVER THE FAR EASTERN PARTS OF OTSEGO AND DELAWARE COUNTIES ARE ALREADY INTO THE LOWER TO MIDDLE 40S.
UPPER LEVEL RIDGE OF HIGH PRESSURE ALONG THE COAST WILL SLOWLY NUDGE INLAND.
353 AM EDT MON OCT 5 2015 THE CLOSED UPPER LOW LOCATED JUST OFF THE GA/FL COAST SHOULD CONTINUE A SLOW DRIFT EASTWARD TODAY BEFORE TAKING A NORTHEAST TURN BY TUESDAY. DRY WEATHER FOR TUESDAY AS A RIDGE BUILDS INTO THE LOWER MS VALLEY AND NORTHWEST FLOW PREVAILS OVER NORTH AND CENTRAL GA. CUTOFF UPPER LOW OVER THE SW CONUS WILL PROGRESS INTO SRN ROCKIES BUT THEN GET PUSHED SOUTH THEN WEST AS LARGE UPPER RIDGE BUILDS OVER WESTERN STATES.
522 AM EDT MON OCT 5 2015 A LARGE AREA OF HIGH PRESSURE CENTERED OVER NORTHERN MAINE WILL RIDGE INTO THE MID ATLANTIC REGION AS IT DRIFTS SOUTH OVER THE NEXT SEVERAL DAYS. WITH A MAINLY DRY COLD FRONT IN THE MIDDLE OF THE WEEK.
Winds will generally be from a southerly direction today into tonight as a trough of low pressure continues across eastern Colorado. As for temperatures, highs today look to reach into the lower to mid 70s with lows in the lower to mid 50s. Upper level ridging continues over the central High Plains in advance of an upper level low currently located over southern California.
649 AM EDT MON OCT 5 2015 MOISTURE WRAPPING AROUND LOW PRESSURE OFF THE SOUTHEAST COAST WILL CONTINUE TO MOVE INTO THE FORECAST AREA TODAY.
457 AM EDT MON OCT 5 2015 LOW PRESSURE OFF THE GEORGIA COAST WILL DRIFT NORTHEAST THROUGH MIDWEEK. HIGH PRESSURE WILL BUILD INTO THE MID ATLANTIC REGION.
The 10 pm EDT regional surface analysis showed a weak cold front across central FL, and a weak trough of low pressure from Charleston, SC, through Columbus, GA.
LOWS OVERNIGHT WILL FALL BACK INTO THE LOWER 50S. HIGHS ON MONDAY WILL BE A BIT WARMER. IN THE MID 60S NEAR LAKE MICHIGAN TO THE LOWER TO MIDDLE 70S WELL INLAND. FAVOR THE COOLER GUIDANCE INCLUDING THE GFS FOR HIGHS TUESDAY.
231 AM CDT MON OCT 5 2015 Impact of clouds on temperatures already under the control of low level northeast flow around the SE US upper low to be the short term forecast challenge today. Readings will be lowest out west as this area will be slowest to break with the remainder of the region warmer than yesterday. Blocking pattern to break down early in the period as persistent upper low over the SE US fills and exits into the Atlantic while SW US upper low slides southeastward into northern Mexico under intensifying northern stream.
WITH AREAS OF LOW PRESSURE SPINNING OVER THE COASTS OF CA AND FL. WHILE A RIDGE AXIS EXTENDS NORTH FROM TX UP INTO THE GREAT LAKES REGION. AS THE CWA SITS SW OF AN AREA OF HIGH PRESSURE OVER THE ERN HALF OF CANADA. HIGH PRESSURE REMAINS CENTERED GENERALLY EAST OF THE CWA. WHILE THE MAIN RIDGE AXIS SLIDES A TOUCH SOUTH. A WARMER AIR MASS IS WORKING ITS WAY BACK IN FROM THE WEST.
DRT IS REGISTERING -RA BUT WITH THE SOUNDING SHOWING PLENTY OF DRY AIR IN THE LOWEST LEVELS.
252 AM MDT MON OCT 5 2015 A STRONG UPPER LEVEL LOW PRESSURE SYSTEM WILL TRACK SLOWLY EAST ACROSS SOUTHERN NEVADA AND NORTHERN ARIZONA TODAY AND TONIGHT. OUT AHEAD OF THIS LOW. THE LOW WILL BE SLOWLY KICK OUT WITH SHOWERS LINGERING THROUGH TUESDAY. AGAIN THE SOUTHERN ZONES WILL BE FAVORED AS THE LOW TRACKS E INTO ARIZONA AND THEN SOUTHEAST TOWARDS SOUTHERN NEW MEXICO BY TUESDAY NIGHT.
428 AM CDT MON OCT 5 2015 LATEST UA ANALYSIS AND WV IMAGERY SHOWS RIDGING OVER THE REGION. BETWEEN A DEEP UPPER LOW NOW EXITING THE SE COAST AND AN UPSTREAM LOW DROPPING INTO SRN CA. WV CHANNEL SHOWS SOME MOISTURE ALOFT STREAMING OVER THE TOP OF THE RIDGE INTO THE AREA WHILE 3. THIS MORNING WILL SEE THE LAST OF THE COOLER-THAN-NORMAL TEMPERATURES FOR THE TIME BEING AS THEY GRADUALLY MODERATE UNDER BUILDING HEIGHTS ALOFT THE NEXT FEW DAYS.
MAIN CONCERN FOR THE BEGINNING OF THE WEEK AND EXTENDED WILL BE TEMPERATURES AS IOWA REMAIN GENERALLY UNDER THE INFLUENCE OF HIGH PRESSURE AND WEAK ZONAL FLOW ALOFT. THOUGH HAVE FAVORED CONTINUED CLOUDS AND WARMER TEMPS. BEST CHANCES FOR PRECIPITATION WILL COME MID WEEK AND LOW PRESSURE SYSTEM ACROSS SW US BEGINS TO PUSH EAST AS WAVE DROPS SOUTH FROM CANADA.
Temperatures are expected to be a few degrees below freezing in many valleys of western Montana by sunrise. A warming and drying trend will begin today as a ridge of high pressure builds over the region.
LOTS OF SUN FOR EVERYONE AND AFTERNOON HIGHS CLIMBING INTO THE LOW 80S. AND WITH A WEAK UPPER RIDGE.
216 AM EDT MON OCT 5 2015 A LARGE AREA OF HIGH PRESSURE ANCHORED OVER EASTERN CANADA WILL CONTINUE TO PROVIDE SEASONABLE TEMPERATURES AND DRY WEATHER TO THE NORTH COUNTRY. TEMPS HAVE FALLEN TO THE LOWER 30S IN MANY SPOTS WITH CALM WINDS AND CLEAR SKIES IN SHELTERED LOCATIONS.
330 AM EDT MON OCT 5 2015 THE NEXT RAIN CHANCE FOR THE UPPER OHIO VALLEY REGION WILL COME WITH A LATE WEEK COLD FRONT. HIGH PRESSURE WILL THUS PREDOMINATE TODAY WITH INSOLATION SUPPORTING HIGHS A COUPLE DEGREES ABOVE THE AVERAGES. DRY WEATHER CAN BE EXPECTED THROUGH MIDWEEK ALTHOUGH A WEAK COLD FRONT IS PROGGED FOR A TUESDAY PASSAGE.
BUT WITH HIGH PRESSURE BUILDING IN DURING THE WEEK TEMPERATURES WILL CLIMB TO ABOVE NORMAL READINGS DURING THE SECOND HALF OF THE WORK WEEK.
621 AM EDT MON OCT 5 2015 A LARGE AREA OF HIGH PRESSURE, STRETCHING FROM THE GREAT LAKES REGION, ACROSS THE NORTHEAST, WILL DOMINATE OUR WEATHER, FOR MUCH OF THIS WEEK.
MOISTURE WRAPPING AROUND LOW PRESSURE OFF THE SOUTHEAST COAST WILL CONTINUE TO MOVE INTO THE FORECAST AREA TODAY.
WILL TRANSITION INTO A QUIET WEATHER PATTERN DURING THE TAF PERIOD AS AN UPPER LOW CONTINUES TO MOVE AWAY FROM THE AREA AND WEAK RIDGING BUILDS. PROBABLY A BROKEN LAYER IN THE HIGHER TERRAIN WHERE A STRAY AFTERNOON SHOWER IS POSSIBLE.
THE CLOSED LOW THAT HAS BEEN RESPONSIBLE FOR OUR CLOUDY WEATHER AS OF LATE WAS LOCATED JUST OFF THE NORTHEAST FLORIDA COAST THIS MORNING AND WILL BE PULLING OFF TO THE NORTHEAST EARLY IN THE FORECAST PERIOD WHILE ANOTHER CLOSED LOW OVER SOUTHERN CALIFORNIA WILL TRANSLATE EASTWARD INTO ARIZONA AND NEW MEXICO THROUGH MID WEEK BEFORE DRIFTING SOUTH INTO NORTHERN MEXICO. UPPER LEVEL RIDGING WILL BUILD ACROSS THE CENTRAL CONUS BETWEEN THESE FEATURES AND BRING WARMER TEMPERATURES TO THE AREA ONCE AGAIN.
128 AM EST SAT NOV 7 2015 HIGH PRESSURE RIDGING INTO THE FORECAST AREA FROM THE ATLANTIC WILL WEAKEN THROUGH TONIGHT. AN APPROACHING COLD FRONT WILL MOVE THROUGH THE REGION SATURDAY NIGHT.
High pressure building into the area, and the associated dry airmass, should limit cloud cover to some thin cirrus. Midwest will be dominated by high pressure throughout the weekend and into the first part of the week. Cooler temps overall, although the highs will be closer to normals for this time of year, the lows will be slightly below that, close to the freezing mark or just below. High pressure will slip to the east and temperatures will warm for the first couple of days of the work week, with southerly winds helping to usher in some warmer air.
250 AM CST SAT NOV 7 2015 The more amplified section of the upper trough was moving east across the Midwest this morning and will shift east across the Great Lakes States today and into New England tonight. The southern branch of the sheared H5 trough across KS early this morning will gradually shift southeast into OK. Exiting high pressure will bring increased south winds for Sunday. Limited mixing depths may keep highs from getting past the lower 60s.
The zone of forcing will shift eastward with advancing trough axis resulting in a chance of light precip across southeast OK.
UPPER RIDGE AND MOSTLY CLEAR SKIES TONIGHT WILL SUPPORT PATCHY FOG IN THE NORTHERN VALLEYS THROUGH SATURDAY MORNING. THE UPPER RIDGE WILL SHIFT EAST ON SATURDAY.
THE REST OF THE SHORT TERM IS QUIET WITH UPPER LEVEL RIDGING BUILDING THROUGH THE WEEKEND. BRINGING WARMER TEMPS TO THE REGION. AN UPPER LEVEL TROUGH OF LOW PRESSURE. THE PERIOD BEGINS WITH THIS TROUGH OVER SOUTHERN CALIFORNIA WITH WARM.
1247 AM EST SAT NOV 7 2015 A COLD FRONT MOVES THROUGH TONIGHT.
CLOUDS CONTINUE TO DECREASE AS THE UPPER TROUGH EXITS EAST. UPDATE LARGE SCALE UPPER LEVEL TROUGH FINALLY PUSHING OFF TO THE EAST AS A STRONG UPPER LEVEL RIDGE BUILDS INTO THE ROCKIES TONIGHT. CLOUDS WILL BE ON THE DECREASE WITH CHILLY TEMPERATURES IN THE LOW TO MIDDLE 20S.
142 AM EST SAT NOV 7 2015 A COLD FRONT THAT MOVED THROUGH THE PENNSYLVANIA TODAY WILL USHER IN NOTICEABLY COOLER WEATHER FOR THE WEEKEND. IT WILL ALSO BE DRY AS HIGH PRESSURE SETTLES ACROSS THE STATE BY SUNDAY. DIFFUSE SFC COLD FRONT HAS PUSHED EAST OF MY SOUTHEASTERN COUNTIES. AS ITS EASTWARD/SOUTHWARD PUSH IS NOW BEING INHIBITED BY SOUTHWEST FLOW ALOFT AHEAD OF A MORE VIGOROUS UPPER TROF PUSHING THROUGH THE UPPER MIDWEST EARLY THIS MORNING. HIGH PRESSURE PUSHES IN FROM THE WEST. A SHARP TROUGH SWEEPS DOWN FROM THE NW ACROSS THE UPPER GREAT LAKES - BUT THE EFFECTS OF ENHANCED SHOWERS SHOULD NOT REACH THE COMMONWEALTH UNTIL AFTER DARK. LOW PRESSURE WAVE ALONG THE OLD FRONT NOW LOOKS LIKE IT WILL NOT PUSH ANY ADDITIONAL PRECIP UP INTO THE SE.
420 AM EST SAT NOV 7 2015 HIGH PRESSURE AND A COOL AIRMASS WILL CONTROL THE REGIONS WEATHER FOR THE WEEKEND. TODAY WILL BE MUCH COOLER THAN PREVIOUS DAYS. HIGH PRESSURE WILL CONTINUE TO BUILD IN TONIGHT. TEMPERATURES WILL FALL DOWN INTO THE LOWER TO MID 30S. THE CENTER OF THE HIGH WILL BE OVER THE REGION ON SUNDAY. HIGHS ON SUNDAY WILL BE IN THE LOWER 50S.
331 AM EST SAT NOV 7 2015 NORTHWEST FLOW WILL BRING COOLER TEMPERATURES AND CLOUDS TODAY. DRY WEATHER IS EXPECTED FOR SUNDAY AS HIGH PRESSURE SETTLES IN. THE LOWER STRATOCUMULUS IS IN RESPONSE TO THE COLDER AIR BEGINNING TO FILTER IN UNDER NORTHWEST FLOW. THIS ENHANCEMENT OF THE LOW-LEVEL LAPSE RATES COULD SPAWN SOME ISOLATED RAIN SHOWERS DOWNWIND OF LAKE ERIE. TEMPERATURES TODAY WILL CLIMB VERY LITTLE AS THE THERMAL TROUGH POSITIONS OVERHEAD WITH WINDS MIXING DOWN THE COLDER AIR. EVERYWHERE ELSE SHOULD CONTINUE TO SEE AT LEAST BROKEN CLOUD COVER AS THE UPPER-LEVEL TROUGH APPROACHES THIS EVENING. INCREASED POPS SLIGHTLY TONIGHT FOR PORTIONS NORTH OF I-80 AS THE UPPER-LEVEL TROUGH SWINGS THROUGH. BUILDING HIGH PRESSURE WILL QUICKLY SHUT DOWN PRECIPITATION EARLY SUNDAY MORNING.
LATEST VWP SHOWS NICE OVERRUNNING PATTERN WITH NORTHERLY WINDS IN THE LOWEST 2KFT WITH SOUTHERLY FLOW ABOVE THAT. HAVE BACKED OFF ON THE LOWER VISBY DUE TO THE LARGER TEMP/DEWPOINT SPREADS. RAIN CHANCES WILL DECREASE DURING THE AFTERNOON HOURS AS DRIER AIR IN THE LOW-LEVELS CONTINUES TO FILTER IN FROM THE NORTH. GUSTY NORTH WINDS CAN ALSO BE EXPECTED ON SATURDAY ALONG WITH MUCH COOLER TEMPERATURES.
SHOWERS AND A FEW EMBEDDED THUNDERSTORMS ARE DEVELOPING NORTH OF THIS LINE AS WARM GULF MOISTURE OVERRIDES THIS SHALLOW COOLER AIR. MAIN IDEA TODAY IS FOR THE DEVELOPMENT OF A COASTAL INVERTED TROUGH AND A TRANSLATION OF WHAT BOUNDARY IS LEFT INLAND TO THIS TROUGH OFFSHORE. COOLER AIR COMING IN BEHIND THIS SYSTEM FOR SUNDAY WILL MAKE FOR A VERY FALL-LIKE FEEL WITH HIGHS MAINLY IN THE 60S AND LOTS OF CLOUD COVER.
COLD FRONT ACROSS THE SOUTHEAST U. PUSHING RIDGE OF HIGH PRESSURE OVER THE ATLANTIC FARTHER SOUTH AND EAST. LOW LEVEL S/SE FLOW ON THE WESTERN SIDE OF THE RIDGE WILL TRANSPORT MOISTURE NORTHWARD. A FEW STORMS WILL ALSO BE POSSIBLE AS MODEL SOUNDINGS INDICATE MODEST INSTABILITY DEVELOPING WITH DAYTIME HEATING AND COOLER TEMPS ALOFT. LOWS FORECAST IN THE LOW 70S MOST AREAS WITH SOME INTERIOR AREAS SEEING MIN TEMPS IN THE UPPER 60S LATE IN THE NIGHT.
HAVE MAINTAINED THE HIGHEST POPS DOWN IN THE FAR SOUTHEAST GIVEN THE CURRENT MOSAIC RADAR TRENDS SHOWING PLENTY OF LIGHT RETURNS STREAMING IN FROM CENTRAL AND EASTERN TENNESSEE. THE AXIS OF A LARGER SCALE TROUGH WAS STILL OVER THE ROCKIES AND NORTHERN PLAINS AND ADVANCING.
WITH INFLUX OF COOLER AIR. TEMPERATURES WILL BE SEVERAL DEGREES COOLER. HIGH TEMPERATURES WILL BE A BIT HIGHER IN THE WEST AND COOLER IN THE EAST DUE TO INCREASED MIXING/RETURN FLOW IN THE WEST. MON: WITH LOW PRESSURE DEEPING TO THE WEST.
Given the light showers that have developed on both sides of the cold front today, figure a few places may just eek out enough rain to measure. The 12Z NAM and GFS have trended drier Sunday night, as a weak upper-level trough tries to pull moisture and light QPF northwest into west Kentucky.
352 AM CST SAT NOV 7 2015 POSITIVELY TILTED H5 TROF FROM THE WESTERN GREAT LAKES TO SOUTHWESTERN U. THEN RAIN WILL END FROM NORTHWEST TO SOUTHEAST THIS AFTERNOON AS DRIER AIR MOVES INTO OUR AREA WHILE H5 TROF MOVES EAST THRU THE OH VALLEY. WEAK COLD FRONT HAS MOVED THRU MIDDLE TN GENERALLY NEAR 60 DEGREES.
840 PM PST FRI NOV 6 2015 HIGH PRESSURE WILL BRING WARMING TEMPERATURES AND GUSTY NORTHEAST WINDS TONIGHT INTO SATURDAY MORNING. A SHIFT TO ONSHORE FLOW AND COOLING TEMPERATURES IS EXPECTED BY SUNDAY AS LOW PRESSURE APPROACHES.
111 AM EST SAT NOV 7 2015 HIGH PRESSURE AND A COOLER AIRMASS WILL BUILD INTO THE REGION FOR THE WEEKEND. COLD FRONT IS EAST OF THE AREA WITH HIGH PRESSURE MOVING IN. A LOW LEVEL CAA PATTERN WILL CONTINUE THROUGH THE DAY ON SATURDAY AS HIGH PRESSURE BUILDS IN FROM THE WEST. LOW LEVEL THERMAL FIELDS OFF THE NAM AND GFS ARE ONLY SUPPORTING HIGHS IN THE LOWER 50S SO WILL TREND HIGHS DOWN A TAD. HIGHS ON SUNDAY WILL BE IN THE LOWER 50S WITH LOWS BOTH SATURDAY AND SUNDAY NIGHTS IN THE LOWER 30S TO POSSIBLY UPPER 20S.
319 AM EST SAT NOV 7 2015 A COLD FRONT CROSSED THE REGION OVERNIGHT. WITH GUSTY WINDS USHERING IN A COOLER AND DRIER AIRMASS IN ITS WAKE FOR TODAY. EVEN COOLER TEMPERATURES ARE EXPECTED FOR SUNDAY. WE'LL SEE SOME UPSLOPE CLOUDS AND SCATTERED SPRINKLES ACROSS THE HIGHER TERRAIN WITH MOSTLY SUNNY SKIES ELSEWHERE IN GUSTY DOWNSLOPE FLOW. BROAD UPPER LONG WAVE RIDGE AXIS REMAINS IN PLACE IN THE EAST AND AMPLIFIES IN RESPONSE TO THE WEST COAST DIGGING LONG WAVE TROUGH. THIS WILL MEAN HIGH PRESSURE BECOMING CENTERED OVER THE NORTHEAST WITH A SLOW WARMNING TREND WITH SUNNY DAYS AND CLEAR NIGHTS THROUGH MIDWEEK. LIGHT WINDS AND MINIMAL SEAS THROUGH MIDWEEK UNDER HIGH PRESSURE.
HIGH PRESSURE WITH DRY AIR WILL BUILD IN LATE SUNDAY ENDING THE SHOWERS. A W TO NW FLOW IS BRINGING IN LOWER CLOUDS AND COOLER AIR. THIS AFTERNOON A SHORT WAVE AND UPPER LEVEL TROF APPROACHES. THIS TROF AND SHORT WAVE EXITING AROUND 6Z. SOME LIGHT SNOW ACCUMULATIONS AT THE HIGHER ELEVATIONS.
A WEAK COLD FRONT WAS STRETCHED FROM LAKE OF THE WOODS MN TO PIERRE SD. SO WILL AN UPPER LEVEL TROF. WEAK RIDGING WILL RETURN LATE SATURDAY.
LIGHT WINDS AND CLEARING SKIES OVERNIGHT WILL LEAD TO A CHILLY SATURDAY MORNING BEHIND A REINFORCING SHOT OF COOLER AIR AS TEMPERATURES BOTTOM OUT IN THE MID-UPPER 20S NORTHWEST TO UPPER 30S-NEAR 40 SOUTHEAST. SURFACE RIDGING WILL PUSH INTO THE AREA TONIGHT WITH A REINFORCING SHOT OF COOLER AIR. THIS ACTIVITY IS NOT EXPECTED TO MAKE IT INTO THE ROLLING PLAINS WITH A DECREASE IN LOWER LEVEL THETA-E VALUES TOMORROW WITHIN THE INCREASING SURFACE RIDGING.
337 AM CST SAT NOV 7 2015 AT H5 UPPER HIGH TO THE EAST OF FLORIDA AND A TROUGH FROM EASTERN CANADA THROUGH THE GREAT LAKES INTO THE DESERT SOUTHWEST. UPPER RIDGE OVER THE WESTERN CONUS INTO WESTERN CANADA. WARMER TEMPERATURES ALOFT AT 850MB AND LIGHT SOUTHWEST WINDS WILL SEE TEMPERATURES RISE INTO THE 50S. THE NORTHERN STREAM RIDGES NORTH INTO CANADA WHILE THE SOUTHERN STREAM TRACKS ACROSS THE SOUTHERN STATES.