Aikyam-Lab/Synoptic-Bench huggingface dataset:
STILL APPEARS BEST CHANCE OF ACCUMULATING SNOW WILL BE ACROSS THE HIGHER TERRAIN OF THE PINE RIDGE AND SOUTHERN BLACK HILLS. THIS EVENING THROUGH THURSDAY NIGHT LARGE UPPER TROUGH COVERS THE WESTERN CONUS. WITH BROAD RIDGE ACROSS THE EAST. CHANCES OF PRECIP WILL INCREASE TONIGHT AS UPPER TROUGH SWINGS NORTHEASTWARD THROUGH THE REGION. AN INCH OR TWO OF SNOW IS POSSIBLE ACROSS UPSLOPE-ENHANCED AREAS OF THE BLACK HILLS AND PINE RIDGE. UPPER WAVE EXITS THE AREA THURSDAY AND HIGH PRESSURE MOVES IN AT THE SURFACE.
348 AM CST THU NOV 5 2015 SURFACE COLD FRONT BISECTING THE FORECAST AREA WITH MILD. MOIST AIRMASS AHEAD OF THE FRONT AND COOLER AIR BEHIND. THE NORTHERN STREAM PORTION OF THE UPPER TROUGH BEGINS TO RAPIDLY CUT OFF OUR FORECAST AREA FROM OUR MOISTURE FETCH.
342 AM EST THU NOV 5 2015 HIGH PRESSURE WEDGE OVER THE MID ATLANTIC WILL SLOWLY ERODE.
WITH WARMER AIRINTRUDING THE AREA. THE MOUNTAINS OF NORTHEAST OREGON WILLSTILL BE UNDER MOSTLY CLEAR SKIES AND SHOULD BE IN THE LOW 20S TOUPPER TEENS. BUT THERE AREALWAYS COLD SPOTS THAT COULD GET NEAR TO BELOW FREEZING. DUE TO THE LOW PROBABILITY AT THOSE SITES, HAVE USED VCSH EXCEPT FOR -SHRA AT KALW.
MID TO UPPER LEVEL CLOUDS WILL INCREASE FROM THE WEST AHEAD OF THE NEXT LOW PRESSURE WEATHER SYSTEM.
346 AM CST THU NOV 5 2015 Large upper level trough centered across northern Arizona will move quickly east today to the western high plains by this evening. As a result surface dry line/cold front combo will quickly move east this morning toward central Texas. In its wake slightly cooler air and windy to very windy conditions will develop in the mountains with breezy to windy conditions developing in many areas of the plains as the vigorous upper trough passes by to the north. Will continue the High Wind Warning for the Guadalupe Mountains Today due to a 40 to 50 knot westerly 700 millibar wind forecast combined with a tight surface pressure gradient. Winds will diminish rapidly by sunset due to nocturnal cooling and passage of the upper trough.
149 AM CST THU NOV 5 2015 SCATTERED SHOWERS CONTINUE ACROSS PORTIONS OF NORTHEAST TEXAS AND SOUTHEAST OKLAHOMA THIS MORNING AS SOUTHWEST FLOW ALOFT AHEAD OF AN UPPER-LEVEL TROUGH ACROSS THE ROCKIES MIGRATES EASTWARD. THIS TROUGH WILL BE RESPONSIBLE FOR INCREASED RAIN CHANCES ACROSS THE ARKLATEX LATER TODAY. RAINFALL RATES ARE FORECAST TO DIMINISH AS THE UPPER-TROUGH AND ASSOCIATED FRONTAL BOUNDARY PROGRESS ACROSS THE AREA LATER TONIGHT.
1231 AM EST THU NOV 5 2015 HIGH PRESSURE WEDGE OVER THE MID ATLANTIC WILL SLOWLY ERODE BY THURSDAY.
240 AM MST THU NOV 5 2015 LOW PRESSURE WILL EXIT THE REGION THIS MORNING. USHERING IN DRIER AIR AND CONTINUED COOLER TEMPERATURES.
323 AM EST THU NOV 5 2015 UNSEASONABLY WARM WITH HIGH PRESSURE TODAY.
FOR 06Z AVIATION FORECASTS SURFACE AND UPPER RIDGES ARE IN PLACE ACROSS THE REGION.
423 AM EST THU NOV 5 2015 CURRENT CONDITIONS ACROSS THE AREA FEATURE HIGH PRESSURE CENTERED TO THE EAST ALONG THE NC AND VA COAST. WARMER TEMPS ADVECTING INTO THE AREA TODAY AND STILL UNDER THE INFLUENCE OF EXITING HIGH PRESSURE WILL STILL LEAVE QUITE A STOUT CAP IN PLACE ACROSS EASTERN KENTUCKY.
HIGH PRESSURE RIDGE AXIS WELL TO THE NORTH WILL CONTINUE THE ONSHORE (EAST) WIND FLOW.
111 AM EST THU NOV 5 2015 UNSEASONABLY WARM WITH HIGH PRESSURE TODAY.
317 AM EST THU NOV 5 2015 HIGH PRESSURE WILL MAINTAIN WARM AND DRY WEATHER TODAY.
1107 PM CST WED NOV 4 2015 LARGE UPPER LEVEL TROUGH MOVG SLOWLY EAST ACROSS FOUR CORNERS. LONGWAVE TROUGH CONTINUES TO DEEPEN AS IT MOVES INTO THE FOUR CORNERS REGION THIS AFTERNOON. THE TROUGH WILL BEGIN TO OPEN UP INTO THE SOUTHERN/ CENTRAL PLAINS DURING THE DAY THURSDAY WITH SOUTHWEST FLOW ALOFT INCREASING AHEAD OF THE TROUGH ACROSS THE TX HILL COUNTRY AND LOWER MISS VALLEY.
MID TO UPPER LEVEL CLOUDS WILL INCREASE FROM THE WEST AHEAD OF THE NEXT LOW PRESSURE WEATHER SYSTEM. A LOW PRESSURE TROF WILL APPROACH THE ROCKIES DURING THE DAY AND BRING LOWER CLOUDS AND PRECIPITATION ACROSS THE NORTHERN ROCKIES.
STRONG FORCING WITH THIS WAVE WITH LEFT EXIT REGION JET DYNAMICS ALOFT AND LOW LEVEL CONVERGENCE AT THE SURFACE ALONG A SECONDARY COLD FRONT.
FOG DEVELOPMENT WILL STILL BE LIMITED AND LOW TEMPS WILL BE A BIT WARMER. STILL EXPECTING ONLY A SMALL TEMPERATURE DIFFERENCE BETWEEN THE RIDGES AND THE VALLEYS WITH THE CLOUDS IN PLACE.
THEN AS THE TROUGH AXIS CROSSES SRN CO WILL SEE THINGS DIMINISH OVER THE SW MTS. WILL STILL SEE SOME LIGHT TO MODT SN PERSIST IN THE W-NW FLOW BEHIND THE TROUGH AXIS. ERN RANGES WILL NOT SEE AS MUCH SN BUT COULD SEE SEVERAL INCHES OVER THE HIGHER ELEVATIONS. THE COLD FRONT ASSOCIATED WITH THIS SYSTEM WILL DROP SWD ACROSS THE PALMER DVD FROM 09-12Z. HAVE GONE ON THE LOWER SIDE OF GUIDANCE FOR HIGH TEMPS. ROSE THU EVENING THE UPR TROF WL EXIT THE STATE TO THE EAST. LATE FRI ANOTHER UPR TROF DROPS SOUTH OVER THE STATE. SAT AN UPR RIDGE BUILDS OVR THE AREA RESULTING IN DRY WEATHER.
AS A COLD FRONT APPROACHES. AS A PACIFIC COLD FRONT APPROACHES. /ISSUED / PRIMARY FORECAST CONCERN ARE THE IMPACTS FROM THE APPROACHING TROUGH LATE TONIGHT INTO TOMORROW. AS THE TROUGH AND ASSOCIATED PACIFIC FRONT/DRYLINE APPROACH.
WIDESPREAD FREEZING TEMPERATURES MAY OCCUR ACROSS THE VALLEYS OF GRAHAM AND COCHISE COUNTIES LATE THURSDAY NIGHT.
This pattern has been fairly consistent for the past few weeks, keeping the better part of the prevailing westerlies flowing across southern Canadian and the northern United States while periodically developing a western CONUS trough that ejects out through the Plains States; and this is what will happen Thursday.
ALTHOUGH THE TEMPERATURES FELT PLEASANTLY COOL, THEY WERE ACTUALLY RUNNING MORE THAN 20 DEGREES ABOVE NORMAL! WE SHOULD NORMALLY BE LOOKING AT LOW TEMPERATURES IN THE LOWER 40S THIS TIME OF THE YEAR.
HIGH PRESSURE WILL BEGIN TO MOVE OVER THE STATE THURSDAY. WITH DRY AND WARMER WEATHER HEADING INTO THE WEEKEND. A VERY ACTIVE AND IMPRESSIVE MOISTURE PLUME LOCATED SOUTH OF AN UPPER LOW NEAR SELIGMAN CONTINUES TO IMPINGE THE CENTRAL AND EASTERN MOGOLLON RIM. CONVECTION ASSOCIATED WITH THE LOW CENTER AND COLD POOL IS NEARLY NON-EXISTENT. THE UPPER LOW IS EXPECTED TO FILL AND LIFT NORTHEAST AFTER MIDNIGHT AS WELL. RIDGING ARRIVES THURSDAY. WITH FAIR AND WARMER CONDITIONS INTO THE WEEKEND. THE LOW PRESSURE SYSTEM WILL MOVE ACROSS EASTERN ARIZONA THROUGH THURSDAY MORNING WITH A ACTIVE BAND OF MODERATE TO HEAVY SNOW SHOWERS MOVING ACROSS THE EASTERN MOGOLLON RIM AND THE WHITE MOUNTAINS. ABUNDANT MOISTURE WILL PRODUCE LOW CIGS AND AREAS OF IFR WITH LOCAL LIFR CONDITIONS OVERNIGHT IN THE HIGH COUNTRY.
WITH LOWS HOLDING MAINLY IN THE 60S AND MOST HIGHS SNEAKING INTO THE LOWER TO MID 70S ON THURSDAY.
1233 AM EST THU NOV 5 2015 HIGH PRESSURE WILL MAINTAIN WARM AND DRY WEATHER THROUGH THURSDAY.
Through the morning hours, we are also expecting the western trough to begin moving into the Plains and pre-frontal trough/dryline to shift into eastern Kansas by midday. Dew points are expected to reach the lower to possibly mid 60s over southeast Kansas and far southwest MO this afternoon ahead of this pre- frontal trough. While we are not in a slight risk at this point, would not be surprised to see a few strong to severe storms from late afternoon into the mid evening as the dryline/pre-frontal trough moves in. Drier air will rush into the area behind this initial boundary, with the cold front eventually catching up to the dryline during the evening.
A LOW PRESSURE SYSTEM DEVELOPING NEAR COLORADO WILL TRACK NORTHEAST THROUGH THE GREAT LAKES REGION THURSDAY NIGHT. HIGH PRESSURE WILL THEN BUILD IN FROM THE CENTRAL PLAINS OVER THE WEEKEND LEADING TO DRY CONDITIONS.
A PACIFIC COLD FRONT WILL ALSO TRANSLATE ACROSS THE AREA. A PACIFIC COLD FRONT WILL ALSO TRANSLATE ACROSS THE TX AND OK PNHDLS LATER TONIGHT. /ISSUED 359 PM CST WED NOV 4 2015/ UPPER LEVEL TROUGH CURRENTLY OVER NEVADA WILL CONTINUE MOVING EAST INTO THE FOUR CORNERS REGION TONIGHT. AMPLE BULK SHEAR WILL KEEP THE POTENTIAL FOR STRONG TO POSSIBLY SEVERE STORMS INTO THE OVERNIGHT HOURS AS THE FOCUS SHIFTS MORE FROM DIURNALLY DRIVEN TO DYNAMICALLY DRIVEN AS THE UPPER LEVEL TROUGH APPROACHES. AS THE UPPER LEVEL TROUGH LIFTS NORTHEAST. IT PUSHES A COLD FRONT SOUTH ACROSS THE PANHANDLES THURSDAY NIGHT. AS WELL AS TEMPERATURES AT OR BELOW THE FREEZING MARK ACROSS THE OKLAHOMA PANHANDLE AND NORTHERN/WESTERN PORTIONS OF THE TEXAS PANHANDLE.
350 AM CST THU NOV 5 2015 PROGRESSIVE UPPER TROUGH MOVING THROUGH THE HIGH PLAINS THIS MORNING. 130KT JET ON THE EASTERN SIDE OF THE TROUGH WITH CONVECTION LIFTING RAPIDLY TO THE NORTHEAST. TO THE EAST HIGH PRESSURE OVER THE SOUTHEAST CONUS WITH RIDGE INTO THE NORTHEAST CONUS. CUSTER SOUTH DAKOTA HAS FINALLY CHANGED OVER TO SNOW AS COOLER AIR FILTERS TO THE SOUTHEAST. INCREASING CLOUDS FROM THE NORTHWEST TONIGHT IN ADVANCE OF ANOTHER WAVE ROUNDING THE BOTTOM OF THE RIDGE TO THE WEST OF US.
UPPER TROUGHING WILL CONTINUE TO MAINTAIN THE EXPANSIVE ROSBY WAVE OVER TWO THIRDS OF THE CONUS. ONCE THE COLD FRONT PASSES MONDAY MORNING. AS THE UPPER THERMAL TROUGH MOVES OUT. AS THE ARCTIC RIDGE BUILDS IN BEHIND IT.
An upper level trough/closed low will develop over the Great Lakes region while a large scale upper ridge builds along the west coast. Clouds and some snow flurries/snow showers are still expected on the west/back side of the main upper low late Sunday night into Monday as a small scale disturbance moves southeast through MO.
WITH A COLD FRONT EXTENDING SOUTH ACROSS THE PLAINS. WITH THE MAIN PLAYER OF INTEREST A SHORT WAVE TROUGH SWIRLING ACROSS THE U. WITH DEEP TROUGHING ENCOMPASSING THE EASTERN CONUS BY LATE MONDAY. WITH HIGHS REBOUNDING TO THE LOW TO MID 50S FOR MOST LOCATIONS. TRIED TO STAY ON THE WARMER SIDE OF GUIDANCE. THE PLAINS COLD FRONT WILL TRACK TOWARDS THE AREA LATE TONIGHT. HAVE ALLOWED FOR A QUICK DROP OFF THROUGH AROUND MIDNIGHT AND THEN BROUGHT TEMPERATURES BACK UP TO AROUND FREEZING OR SLIGHTLY ABOVE ONCE THE THICKER CLOUDS ARRIVE. THE FIRST INITIAL SHOT OF PRECIPITATION ASSOCIATED WITH THE PASSING COLD FRONT WILL MOVE THROUGH MONDAY MORNING. BEFORE ADDITIONAL PRECIPITATION DEVELOPS AS THE LONGWAVE TROUGH QUICKLY DEVELOPS ACROSS THE EASTERN CONUS. THE ONLY EXCEPTION WILL BE THE HIGHER ELEVATIONS ABOVE 2500 FEET.
STRONG WINDS HAVE DIMINISHED AS THE AND HIGH PRESSURE IS BUILDING OVER THE REGION. HIGH PRESSURE WILL BUILD ALOFT TONIGHT AND SUNDAY. HIGH PRESSURE BUILDS OVER THE WEST COAST SUNDAY AND THEN EXPANDS INLAND MONDAY, THUS BEGINNING A PERIOD OF DRY AND MILD CONDITIONS WITH GENERALLY LIGHT WINDS.
WINDS BECOME SOUTH AND SOUTHWEST MID MORNING AND REMAIN SO UNTIL A COLD FRONT ARRIVES AROUND CLL NEAR 06Z/MON AND 10Z/MON AT IAH. NORTH WINDS SHOULD RELAX QUICKLY THIS EVENING AS HIGH PRESSURE SETTLES IN OVER THE AREA. AROUND SUNRISE IT SHOULD BE OVER THE MAJOR HUBS WITH CALM/LIGHT WINDS THEN WINDS BECOME MORE SOUTHWEST TO SOUTHEAST AS THE HIGH SLIDES AWAY TO THE EAST. ON SUNDAY A LARGE PLUME OF HIGH LEVEL PACIFIC MOISTURE SHOULD OVERSPREAD THE AREA BRINGING CIRRUS TO THE REGION AS LARGE UPPER TROUGH OVER THE GREAT LAKES DEEPENS. NEXT COLD FRONT NEARING CLL AROUND 09Z MONDAY AND IAH 12Z MONDAY.
WITH TEMPERATURES REACHING THE LOW TO MID 70S. DRIER AIRMASS WILL BE SLIGHTLY COOLER AS WELL.
THE MAIN PIECE OF ENERGY WILL MOVE TO THE EAST COAST MONDAY NIGHT BUT AN UPPER LEVEL TROUGH WILL REMAIN OVER THE REGION INTO AT LEAST THE MIDDLE OF THE WEEK. LOW PRESSURE WILL BE LOCATED OVER THE UPPER GREAT LAKES TODAY WITH AN INCREASING SOUTH TO SOUTHWEST WIND ANTICIPATED. STILL UNCERTAINTY ABOUT PRECIPITATION TYPE WITH LOWS TONIGHT HOVERING CLOSE TO FREEZING AND MARGINALLY COLD TEMPERATURES ALOFT TO SUPPORT SNOW.
A cold front will move through the TAF sites during the late afternoon/early evening hours resulting in north winds of 6 to 12 knots. A cold front will approach KABI and KSJT between 20z and 22z, resulting in northwest winds of 6 to 12 knots. /issued 340 PM CST SAT FEB 6 2016/ (Tonight and Sunday) Satellite loops show an upper level low dropping southeast across East Texas this afternoon. Weak cold front has cleared the area, with dry northwest and northerly flow prevailing. South winds return tomorrow and will lead to slightly warmer temperatures. Again, given the very dry air mass in place and the wide diurnal swings we have seen, going with the warmer guidance numbers for highs on Sunday afternoon.
432 AM EST SUN FEB 7 2016 AN AREA OF LOW PRESSURE OFFSHORE WILL CONTINUE TO INTENSIFY AND SHIFT TO THE NE TODAY. A COLD FRONT WILL PASS THROUGH LATE MONDAY.
339 AM EST SUN FEB 7 2016 AN AREA OF LOW PRESSURE OFFSHORE WILL CONTINUE TO INTENSIFY AND SHIFT TO THE NE TODAY. A COLD FRONT WILL PASS THROUGH LATE MONDAY.
DRY AND RELATIVELY WARM CONDITIONS WILL PERSIST DURING THE NEXT SEVEN DAYS AS A STRONG UPPER LEVEL RIDGE OF HIGH PRESSURE BUILDS OVER THE WESTERN UNITED STATES.
1255 AM EST SUN FEB 7 2016 A DEEP TROUGH OF LOW PRESSURE WILL CONTINUE TO DEVELOP ACROSS THE EASTERN UNITED STATES WITH CHANCES FOR SNOW SHOWERS AND TEMPERATURES SLOWLY RETURNING TO NEAR NORMAL VALUES.
243 AM CST SUN FEB 7 2016 DEEPENING UPPER LOW MOVG OFFSHORE. FOLLOWED BY ANOTHER UPPER LOW DIGGING INTO OHIO VALLEY. STG COLD FRONT ARRIVING EARLY MONDAY AND QUICKLY MOVG ACROSS THE AREA.
445 AM EST SUN FEB 7 2016 HIGH PRESSURE WILL PROVIDE ONE MORE FAIR AND RELATIVELY MILD DAY TODAY. A SLOW MOVING UPPER LOW WILL BRING A PROLONGED PERIOD OF UNSETTLED WEATHER STARTING LATER MONDAY AND CONTINUING AT LEAST THROUGH MID WEEK. FAIR AND MILD CONDITIONS WILL CONTINUE TODAY SQUEEZING IN ONE LAST DAY BEFORE A SLOWLY DEVELOPING UPPER LOW DROPS INTO THE EASTERN US AND BRINGS A PROLONGED PERIOD OF INCLEMENT WEATHER TO THE REGION FOR THE NEW WORK WEEK. CONSIDERABLE UNCERTAINTY EXISTS WITH THE ONSET OF WHAT AT LEAST INITIALLY LOOKS LIKE SOME LIGHT PRECIPITATION AS THE UPPER LOW DIGS THROUGH THE UPPER MIDWEST ON A TRACK TOWARD THE OHIO VALLEY AND EVENTUALLY NERN US.
LOW PRESSURE WILL SPREAD RAIN AND SNOW OVER THE REGION ON MONDAY. AREA WILL REMAIN IN THE RIDGING BETWEEN TWO LOW PRESSURE SYSTEMS. THE ENCROACHMENT OF THE MID/UPPER LOW CENTER SHOULD SUFFICIENTLY WEAKEN THE WIND/FRONTOGENESIS POTENTIAL AND OVERALL ASCENT FIELDS AND OFFSET THE IMPROVED TEMPERATURE PROFILE FOR SNOW.
PATCHY FOG DEVELOPMENT IS POSSIBLE SUNDAY MORNING IN THE LOWER SNAKE PLAIN AND FAVORED MTN VALLEYS.
326 AM EST SUN FEB 7 2016 HIGH PRESSURE IS IN PLACE ACROSS THE REGION EARLY THIS MORNING. PUSH HIGH TEMPERATURES WELL INTO THE LOW TO MID 50S OVER MUCH OF THE VALLEY. BRINGING A COLD FRONT INTO THE TENNESSEE VALLEY LATE TONIGHT INTO MONDAY MORNING. TEMPERATURES WILL DROP TO BELOW FREEZING ALONG THE CUMBERLAND MOUNTAINS AND NORTHERN PLATEAU LATE TONIGHT. WITH SOME LIGHT ACCUMULATIONS POSSIBLE IN AREAS THAT ARE BELOW FREEZING. THE MAIN WEATHER STORY WILL CONTINUE TO BE DEVELOPING LONG-WAVE TROUGH OF LOW PRESSURE ACROSS THE EASTERN HALF OF THE NATION.
330 AM CST SUN FEB 7 2016 Seasonably warm temperatures will continue today ahead of a cold front which will move through much of the area during the afternoon. Winds will be slow to subside overnight with a further increase in winds on Monday along with noticeably cooler temperatures.
339 AM CST SUN FEB 7 2016 Upper trough moving down across the Central Plains states today as a strong ridge remains over the West Coast. The ridge will build east the next few days and dominate the wx pattern resulting in mild and warming wx for the area. The colder air looks to lag the wind shift as it will be cooler on Monday with highs in the 50s.
HIGH PRESSURE POSITIONED OVER THE WEST COAST WILL STRENGTHEN SUNDAY AND MONDAY WITH OFFSHORE FLOW AT THE SURFACE. THE RIDGE WILL BEGIN TO WEAKEN BY MIDWEEK.
WATER VAPOR IMAGERY SHOWED A RATHER STRONG TROF OVER THE SOUTHEAST, JUST PASSING EAST OF OUR FORECAST AREA THIS MORNING. FIRST "WAVE" OF PRECIP OR VIRGA WILL SLIDE SE OF THE AREA QUICKLY EARLY MONDAY MORNING WITH THE PRE-FRONTAL SFC TROF. THEN THE STRONGER COLD FRONT ARRIVES WITH STRONG COLD ADVECTION AND LOW LEVEL LAPSE RATES GENERATING SOME LIMITED CAPE FOR SHOWERY PRECIP.
342 AM EST SUN FEB 7 2016 A STRONG COLD FRONT WILL CROSS THE REGION THIS MORNING. HIGH PRESSURE WILL BUILD INTO THE AREA TONIGHT.
Two short wave trofs of interest early this morning, one moving through the upper MS Valley and another moving out of Saskatchewan into the northern Plains.
A cold frontal boundary from the central Plains through Minnesota this morning will progress eastward today crossing southeastern IL during the afternoon. mild temperatures for this time of year will continue early today with cooling beginning by late afternoon behind the cold front. Highs ranging from the mid 40s to around 50 north of I-70 to the low 50s south of I-70. High pressure ridge losing ground to approaching storm system moving in from the northwest, diving into the region and bringing precipitation and considerably colder air. Later this evening, models fairly split on some scattered precipitation with a prefrontal trof, mainly in the east and SE along the IL/IN border.
A LARGE UPPER LEVEL LOW WILL MOVE INTO THE AREA MONDAY BRINGING SNOW AND COLDER CONDITIONS. /TODAY/ MID AND HIGH LEVEL CLOUDINESS WILL INCREASE TODAY AHEAD OF AN APPROACHING COLD FRONT. WENT NEAR THE WARMER MET MOS GUIDANCE FOR HIGHS.
COULD STILL SEE NEAR OR SLIGHTLY BELOW FREEZING TEMPERATURES ACROSS THE NORTHERN COUNTIES. A STRONG SHORT WAVE TROUGH MOVING INTO THE DAKOTAS WILL DIVE SOUTHEAST AND BECOME A STRONG UPPER LOW OVER THE WESTERN GREAT LAKES REGION WITH TROUGH EXTENDING TO THE SOUTH INTO THE MID-MISSISSIPPI VALLEY. THIS WILL SEND THE NEXT COLD FRONT INTO THE REGION LATE SUNDAY NIGHT.
BUT WILL SLOW DOWN OVER THE NEXT SEVERAL DAYS AS A STRONG RIDGE BUILDS OVER THE EASTERN PACIFIC AND WESTERN NORTH AMERICA. THE RIDGE WILL MOVE VERY SLOWLY EAST.
WITH HIGH PRESSURE DOMINATING AND SURFACE INVERSIONS IN PLACE. THE WEEK IS SHAPING UP TO BE VERY QUIET WITH A HIGH AMPLITUDE RIDGE ALOFT OVER THE GREAT BASIN MAINTAINING A DRY NORTHWEST TO NORTH FLOW OVER EASTERN UT AND WESTERN CO.
HIGH CLOUDS WILL GRADUALLY INCREASE TOWARD THE END OF THE PERIOD AS A LOW PRESSURE SYSTEM APPROACHES FROM THE WEST.
Southerly winds will be on the increase ahead of an approaching strong cold front. This will amplify the upper level pattern across the nation and result in the development of a deep low pressure system over the Great Lakes and Ohio Valley by Monday. The passage of a strong cold front tonight will bring sharply colder air into the region by Monday on brisk northwest winds. The first chance arrives tonight--mainly in the evening--in the form of light rain with the passage of the cold front.
As this trough dives into the area, it will help to push the area of low pressure southward, increasing the pressure gradient across the forecast area. Despite the breezy northwesterly winds and scattered mid-level clouds, expect temperatures to warm into the low 50s for much of the outlook area. The only exception is in far north central Kansas where these northwest winds may usher some cooler air into the area off of the snow pack still present in Nebraska, with highs likely staying in the mid/upper 40s.
UNCERTAINTY EXISTS WITH EXTENT OF ACCUMULATING SNOWFALL MONDAY UPPER LOW DEVELOPING OFF THE COAST OF SC/GA OVERNIGHT. COLD CORE CLOSED UPPER LOW DROPPING INTO THE SOUTHEAST TONIGHT. DEEPENING UPPER TROUGH OVER THE GREAT LAKES WILL CONTINUE TO SEND COLD AIR SOUTHWARD INTO THE FORECAST AREA. MOISTURE MOVING INTO NORTH GA STILL ON TRACK TO PRODUCE SOME FREEZING PRECIPITATION BEGINNING LATE SUNDAY NIGHT.
A HIGH PRESSURE SYSTEM CONTINUES TO BUILD INTO THE TWO STATE AREA AND WILL PROVIDE DRY CONDITIONS TONIGHT.
411 AM EST SUN FEB 7 2016 A DEEP TROUGH OF LOW PRESSURE WILL CONTINUE TO DEVELOP ACROSS THE EASTERN UNITED STATES WITH CHANCES FOR SNOW SHOWERS AND TEMPERATURES SLOWLY RETURNING TO NEAR NORMAL VALUES. A QUIET FORECAST IS EXPECTED TODAY WITH SLIGHT RIDGING ALOFT IN THE AFTERNOON BEFORE AN UPPER LEVEL TROUGH SETS UP MONDAY. EXPECT HIGHS THIS AFTERNOON TO BE SIMILAR TO YESTERDAY AND WARM INTO THE LOW TO MID 30S WITH OVERNIGHT LOWS TO DROP INTO THE MID TEENS IN THE NORTHEAST KINGDOM AND ADIRONDACKS AND STAYING IN THE MID 20S IN THE CHAMPLAIN AND CONNECTICUT RIVER VALLEYS. A RIDGE OF HIGH PRESSURE WILL NOSE SOUTHWARD FROM QUEBEC ON MONDAY WITH FAIR AND DRY WEATHER EXPECTED ACROSS THE NORTH COUNTRY.
WIND SPEEDS SLOWLY DECREASING ACROSS OUR SOUTHERN LARAMIE RANGE AS GRADIENTS RELAX SOMEWHAT AND THUS WILL LIKELY BE ABLE TO CANCEL THE HIGH WIND WARNING THERE. EXPECT SURFACE WINDS TO DECREASE AS THE LOW LEVELS OF THE ATMOSPHERE DECOUPLE.
A COLD FRONT WILL MOVE INTO THE AREA LATE TOMORROW AFTERNOON INTO THE EARLY EVENING. /ISSUED 345 PM CST SAT FEB 6 2016/ AN UPPER LEVEL LOW OVER SOUTHEAST TEXAS WILL CONTINUE TO MOVE SOUTHEAST INTO LOUISIANA TONIGHT. THE LOW CLOUDS ACROSS MOST OF THE EASTERN TWO-THIRDS OF NORTH TEXAS WILL BE ON THE DECREASE AFTER SUNSET. ANOTHER COLD FRONT WILL MOVE INTO NORTH TEXAS SUNDAY AFTERNOON AND MOVE THROUGH THE SOUTHEASTERN ZONES SUNDAY NIGHT. AS HIGH PRESSURE BUILDS IN BEHIND THE FRONT.
NORTHWEST FLOW WILL BE THE DOMINATE UPPER LEVEL PATTERN OVER THE NORTHERN PLAINS AS A HIGH AMPLITUDE RIDGE RESIDES OVER THE WEST COAST AND A TROUGH OVER THE EASTERN CONUS.
WITH A TRAILING COLD FRONT PUSHING ACROSS THE NORTHERN HIGH PLAINS. IN ADVANCE OF THE COLD FRONT. AS THE STRONG COLD FRONT CONTINUES TO PUSH SOUTHEAST ACROSS THE NORTHERN HIGH PLAINS AND INTO THE REGION: 1)THE POTENTIAL FOR BLOWING SNOW. WHILE TEMPERATURES WARMED WELL ABOVE FREEZING TODAY ACROSS WESTERN SOUTH DAKOTA. AND MECHANICAL MIXING FROM THE PASSAGE OF THE COLD FRONT.
CLEAR SKIES AND LIGHT WINDS HAVE ALLOWED TEMPERATURES TO FALL TO BELOW FREEZING ALREADY ACROSS THE NORTH AND EAST. AN UPPER LEVEL LOW PRESSURE WAS ANALYZED OVER EASTERN TX WHICH IS INDIRECTLY RESPONSIBLE FOR THE UPPER LEVEL CLOUDINESS ACROSS THE REGION TODAY. THIS LOW WILL CONTINUE TO SLOWLY MOVE EAST THROUGH THE OVERNIGHT WITH NEGLIGIBLE IMPACTS TO SENSIBLE WEATHER ACROSS THE REGION. ANOTHER MILD DAY IS EXPECTED WITH TEMPERATURES POSSIBLY A DEGREE OR TWO WARMER IN THE MIDDLE TO UPPER 50S. A DEEP LONGWAVE TROUGH IS FORECAST TO EVOLVE BUT THE MAIN INFLUENCE OF THIS FEATURE ACROSS THE MID-SOUTH WILL BE COOLER THAN NORMAL TEMPERATURES. CONTRIBUTING TO THE LARGER AMPLIFICATION OF THE LONGWAVE TROUGH.
TEMPERATURES UNDER THE CLOUDS REMAIN IN THE LOWER 30S. WHILE SITES IN THE SUN ARE IN THE LOWER TO MID 40S. THE HIGHWAY 20 GLOOM IN IOWA MAY LAST THROUGH SUNSET. DRY LOW LEVELS WILL LIKELY NOT SATURATE UNTIL WELL BEHIND THE COLD FRONT. MODELS FAIRLY SIMILAR IN TAKING A VIGOROUS UPPER LEVEL TROUGH/CLIPPER INTO THE UPPER MIDWEST AND GREAT LAKES REGION. THIS WILL SUPPORT A TIGHTENING GRADIENT BETWEEN THE CYCLONE IN THE GREAT LAKES AND SEASONABLY STRONG HIGH PRESSURE BUILDING INTO THE WESTERN HIGH PLAINS.
OTHERWISE RIDGE RAPIDLY BUILDS INTO THE REGION TONIGHT. STILL BELIEVE POTENTIAL EXISTS THUS HAVE LEFT PATCHY FREEZING FOG THROUGHOUT MOST LOWER ELEVATIONS.
THE BIG UPPER LOW BEGINS TO DIG SOUTHEAST INTO THE GREAT LAKES TODAY. THE WARM AIR ADVECTION OUT AHEAD OF THE LOW HAS SATURATED THE MID AND UPPER LEVELS.
A WEAK COLD FRONT WILL MOVE ACROSS THE TAF SITES BETWEEN 07Z AND 11Z TONIGHT WITH LITTLE TO NO FANFARE OTHER THAN WINDS BECOMING NW TO N IN THE WAKE OF THIS FEATURE. A WEAK COLD FRONT WILL MOVE ACROSS THE TAF SITES BETWEEN 06Z AND 10Z TONIGHT WITH LITTLE TO NO FANFARE OTHER THAN WINDS BECOMING NW TO N BEHIND THE BOUNDARY. AS THIS SYSTEM BROADENS AND MOVES SOUTHEASTWARD TOWARD THE GREAT LAKES REGION IT WILL FORCE A WEAK COLD FRONT SOUTHWARD INTO THE AREA RESULTING IN NORTHWESTERLY SURFACE WINDS BY MORNING.
338 AM EST SUN FEB 7 2016 COOLER WEATHER IS EXPECTED MOST OF THE WEEK AS A SERIES OF COLD FRONTS CROSS SOUTH FLORIDA. COLD FRONT CLEARED THE REGION EARLIER TONIGHT. MAKING CONDITIONS FEEL QUITE A BIT COOLER. HIGH PRESSURE WILL DOMINATE THROUGH THE PERIOD.
Throughout the day, SW winds will turn NW as a cold front crosses the area Sunday morning.
THIS DISTURBANCE WL MOVE TO THE EAST OF THE AREA EARLY THIS EVENING AND THE HIGH CLOUDS WL DECREASE. ON SUNDAY A DISTURBANCE WL MOVE THRU NE AND INTO KS AND WL PUSH SOME COOLER AIR INTO ERN CO. THIS WL RESULT IN HIGH TEMPS BEING COOLER THAN TODAY OVER THE PLAINS. THE HIGH VALLEYS HOWEVER. ARE EXPECTED TO SEE SLIGHTLY WARMER TEMPS.