Aikyam-Lab/Synoptic-Bench huggingface dataset:
337 AM CDT FRI MAR 27 2015 UPPER LEVEL TROUGH AXIS CURRENTLY SWINGING ITS WAY ACROSS THE MID MISS VALLEY WILL BE BRINGING WITH IT A MIX OF MID AND HIGH CLOUDS AFFECTING OUR REGION TODAY. LIFT IN ASSOCIATION WITH THIS UPPER TROUGH SHOULD REMAIN NORTHEAST OF OUR REGION TODAY WHERE SOME LIGHT PRECIP WILL BE POSSIBLE. WHICH WILL ALSO ALLOW A COLD FRONT TO MOVE THROUGH OUR REGION TODAY. IN THE WAKE OF THE COLD FRONT. UPPER RIDGING AT THE SFC WILL SETTLE INTO OUR REGION OVERNIGHT WITH THIS RIDGE AXIS QUICKLY MOVING EAST OF OUR REGION BY SATURDAY MORNING.
STRENGTHENING HIGH PRESSURE ALOFT WILL CONTINUE TO RESULT IN DRY CONDITIONS AND ABOVE NORMAL DAYTIME TEMPERATURES THROUGH THE UPCOMING WEEKEND. CLEAR SKIES ACROSS SOUTHEAST ARIZONA THIS MORNING AS A STRONG AND EXPANSIVE RIDGE OF HIGH PRESSURE IS CURRENTLY LOCATED ACROSS CALIFORNIA. EVEN WARMER TEMPERATURES WILL BE IN STORE FOR SOUTHEAST ARIZONA THE NEXT FEW DAYS. THE RIDGE WILL CREST ACROSS SOUTHEAST ARIZONA THIS WEEKEND WITH THE WARMEST TEMPERATURES EXPECTED ON SATURDAY WHEN MANY RECORD HIGHS WILL BE IN JEOPARDY. ONCE THE RIDGE SHIFTS TO THE EAST.
LATEST SATELLITE IMAGERY INDICATED A BROAD UPPER TROUGH AXIS ABOUT TO PHASE TOWARD THE LOWER MISSISSIPPI VALLEY REGION. CLOUDS ASSOCIATED WITH THE UPPER TROUGH WAS PUSHING TOWARD THE REGION FROM THE OZARKS WHICH WAS ASSOCIATED WITH SOME VERY LIGHT RAIN. FOR TODAY MODELS SHOW THAT THE BROAD UPPER TROUGH AXIS WILL PASS THROUGH THE REGION. THE UPPER TROUGH AXIS WILL PUSH TO THE EAST FOR TONIGHT. NOT LOOKING FOR ANY FREEZING TEMPS IN THE NORTHEAST. IT WILL BE ANOTHER COOL DAY WITH HIGHS FROM THE LOWER 50S NORTH TO THE AROUND 70 SOUTHWEST.
151 AM EDT FRI MAR 27 2015 A LARGE SCALE UPPER LEVEL TROUGH WILL DIG SOUTHEAST ACROSS THE GREAT LAKES AND OHIO VALLEY THROUGH FRIDAY NIGHT. HIGH PRESSURE WILL BUILD INTO THE AREA ON SATURDAY.
The approaching upper trof now moving inside 140W should weaken rapidly as it approaches our CWA and encounters the downstream ridge. 90 tenths associated with the incoming trof will likely erode as it moves Ewd into lower PW air along the coast. The approaching trof is forecast to be progressive and shift the ridge inland on Fri.
505 AM EDT FRI MAR 27 2015 A COLD FRONT WILL SLOWLY SHIFT SOUTH THROUGH OUR REGION EARLY THIS MORNING WITH COLDER AIR FILTERING IN BEHIND THE FRONT.
601 AM EDT FRI MAR 27 2015 HIGH PRESSURE WILL BEGIN TO BUILD IN FROM THE WEST TODAY AND TONIGHT. LOW PRESSURE WILL TRACK WELL SOUTH OF THE GULF OF MAINE ON SATURDAY.
HIGH PRESSURE WILL PERSIST OVER THE REGION PROVIDING DRY WEATHER AND KEEPING TEMPERATURES WELL ABOVE NORMAL. ANOTHER RECORD SETTING HOT DAY IS ON TAP FOR PARTS OF THE FORECAST AREA AS A STRONG ANTICYCLONE (HIGH PRESSURE AREA) IS PARKED OVER CENTRAL CALIFORNIA. EXPECT MANY 90+ READINGS OVER THE LOWER ELEVATIONS WITH RECORDS FALLING. THE HIGH IS PROJECTED TO WEAKEN AND MOVE EAST TONIGHT AND SATURDAY AS FORECAST MODELS BRING A SHORT WAVE TROUGH INTO THE COAST TONIGHT AND SATURDAY. IN THE SIERRA, COOLER AIR ALOFT WILL ARRIVE WITH THE TROUGH AND INCREASE INSTABLILTY.
320 AM PDT FRI MAR 27 2015 UPDATED MARINE SECTION IT WILL BE A LITTLE COOLER TODAY WITH MORE COOLING ON SATURDAY.
120 AM EDT FRI MAR 27 2015 A DEEP UPPER LVL TROUGH OVER THE MISSISSIPPI VALLEY WILL SWING EAST ACROSS PENNSYLVANIA THIS WEEKEND. RADAR SHOWS RAIN TRAILING THE COLD FRONT ALL THE WAY BACK WEST VA AND EASTERN KENTUCKY. TO ARND 40F ACROSS THE LOWER SUSQ VALLEY. APPROACH OF UPPER LVL TROUGH COULD SUPPORT A FEW PM SNOW SHOWERS. MAX TEMPS SHOULD RANGE FROM ONLY ARND FREEZING OVR THE NW MTNS. UPPER TROF DEEPENING OVER THE EASTERN U. SIGNIFICANT PRECIPITATION ASSOCIATED WITH THIS TROF SHOULD HAVE CONCLUDED BY DAYTIME FRIDAY.
1153 PM MDT THU MAR 26 2015 06Z TAF CYCLE UPPER LEVEL RIDGE OF HIGH PRESSURE CENTERED OVER SRN CALIFORNIA WILL SLOWLY SHIFT EWD TOWARD NM LATE TONIGHT AND FRIDAY.
MOSTLY SUNNY SKIES ACROSS THE REGION TODAY AS AN UPPER RIDGE EDGES INTO THE 4 CORNERS REGION. UPPER RIDGE REMAINS IN PLACE SO WARM AND DRY CONDITIONS WILL CONTINUE WITH N-NW FLOW CONTINUING. LOOK FOR A BIT WARMER OVERNIGHT TEMPS TONIGHT AS 700MB AND 850MB TEMPS WARM BY ABOUT 5 DEG C. GFS AND NAM MODELS HINTED AT AN ISOLATED AFTN SHOWER OVER THE HIGHER TERRAIN WHILE THE EC REFRAINED. BRINGING A SLIGHT CHANCE FOR A FEW SHOWERS ACROSS THE HIGHER TERRAIN OF THE EASTERN MOUNTAINS DURING THE EVENING. UPPER RIDGE TO OUR WEST WILL MIGRATE ACROSS THE ROCKIES. BRINGING WARMER MID LEVEL TEMPERATURES. HIGHS ACROSS THE HIGH VALLEYS SHOULD BE IN THE 60S TO LOWER 70S. PUSHING A COLD FRONT ACROSS THE EASTERN PART OF OUR CWA AFTER MIDNIGHT.
310 AM PDT FRI MAR 27 2015 IT WILL BE A LITTLE COOLER TODAY WITH MORE COOLING ON SATURDAY.
411 AM CDT FRI MAR 27 2015 HIGH PRESSURE WILL CONTINUE TO BUILD OVER TX TODAY WITH NORTHERLY WINDS DECREASING. CLOUD COVER HAS DECREASED WITH A SHORT WAVE TROUGH EXITING THE AREA. HIGH PRESSURE MOVES EAST SATURDAY WITH SOUTHERLY WINDS RETURNING.
CLEAR AND QUIET WITH NEAR TO SLIGHTLY ABOVE NORMAL TEMPS EXPECTED THROUGH THE SHORT TERM IN RESPONSE TO A RIDGE BUILDING ACROSS THE AREA. THE ONSHORE WINDS WILL LEAD TO SLIGHTLY WARMER HIGHS ON SAT.
426 AM CDT FRI MAR 27 2015 HIGH PRESSURE OVER THE AREA WILL PROVIDE YET ONE MORE COOL DAY WITH SUNNY SKIES AND LIGHT WINDS.
A LARGE RIDGE OF HIGH PRESSURE CURRENTLY STRETCHES FROM THE MN ARROWHEAD SW THROUGH THE CENTRAL PLAINS. THERMAL TROUGHING TO AMPLIFY OVER THE EASTERN U. SUB FREEZING TEMPS LOOK IMMINENT. STRONG THERMAL TROUGHING WILL MAINTAIN ITS GRIP.
/ISSUED 342 AM CDT FRI MAR 27 2015/ REINFORCING COLD FRONT WILL PUSH THROUGH THE REGION TODAY KEEPING HIGHS WELL BELOW NORMAL. HOWEVER A LONGER PERIOD OF LIGHT WINDS WILL ALLOW TEMPS ACROSS FAR NW AR TO APPROACH FREEZING THOUGH UNCERTAINTY EXISTS AS MID CLOUDS WILL ALSO BE INCREASING AHEAD OF THE NEXT WAVE.
350 AM CDT FRI MAR 27 2015 NORTH AND CENTRAL TEXAS REMAIN IN NORTHWEST FLOW ALOFT AS A POSITIVELY TILTED UPPER LEVEL TROUGH TAKES HOLD OF THE EASTERN HALF OF THE CONUS AND AN UPPER LEVEL RIDGE CONTINUES TO RESIDE OVER SOUTHERN CALIFORNIA. A REINFORCING COLD FRONT IS EXPECTED TO PUSH THROUGH THE AREA TODAY.
427 AM EDT FRI MAR 27 2015 AN UPPER LEVEL TROUGH WILL SHIFT EAST ACROSS THE REGION THROUGH TONIGHT. A FEW SPRINKLES OR FLURRIES WILL BE POSSIBLE THIS AFTERNOON BEFORE HIGH PRESSURE BUILDS INTO THE AREA FOR SATURDAY.
AN UPPER LEVEL RIDGE WILL HELP BRING NEAR-RECORD WARMTH TO THE AREA TODAY. WITH THE RIDGE AXIS PASSING THROUGH BY MIDDAY. WE INCREASED POPS IN THE LOWER ELEVATIONS BASED ON A RAPID INCREASE IN MOS POPS. AGAIN REFERRING TO THE LOWER ELEVATIONS. ESPECIALLY AS THE COLD FRONT MOVES THROUGH EARLY SATURDAY MORNING. WITH THE COLD FRONTAL PASSAGE EARLY TOMORROW. THE LOWS WILL NOT BE ABLE TO DROP ALL THAT MUCH.
630 AM EDT FRI MAR 27 2015 AN UPPER LEVEL TROUGH WILL SHIFT EAST ACROSS THE REGION THROUGH TONIGHT. A FEW SPRINKLES OR FLURRIES WILL BE POSSIBLE THIS AFTERNOON BEFORE HIGH PRESSURE BUILDS INTO THE AREA FOR SATURDAY.
HIGH PRESSURE OVER THE REGION TODAY PRODUCED RECORD WARMTH WITH SEVERAL NEW RECORD HIGHS BEING SET ACROSS THE FORECAST AREA. THE HIGH PRESSURE WILL REMAIN IN PLACE OVERNIGHT AND EARLY FRIDAY BEFORE A FAST MOVING TROUGH ARRIVES FROM THE WEST FRIDAY NIGHT. INSTABILITY WILL BEGIN TO INCREASE OVER CENTRAL AND NORTHEAST OREGON LATE FRIDAY AFTERNOON WHICH WILL LEAD TO SOME CONVECTIVE SHOWERS TO DEVELOP AHEAD OF THE APPROACHING TROUGH. THE TROUGH WILL PUSH A COLD FRONT THROUGH THE REGION OVERNIGHT FOLLOWED BY THE UPPER TROUGH PASSAGE LATE FRIDAY NIGHT AND EARLY SATURDAY.
414 AM EDT FRI MAR 27 2015 A COLD FRONT WILL SLOWLY SHIFT SOUTH THROUGH OUR REGION EARLY THIS MORNING WITH COLDER AIR FILTERING IN BEHIND THE FRONT.
The trough and cold front will pass during Saturday morning and will be associated with rain and increased winds. Winds are expected to decrease during the evening as the trough continues off to the east.
342 AM CDT FRI MAR 27 2015 REINFORCING COLD FRONT WILL PUSH THROUGH THE REGION TODAY KEEPING HIGHS WELL BELOW NORMAL. HOWEVER A LONGER PERIOD OF LIGHT WINDS WILL ALLOW TEMPS ACROSS FAR NW AR TO APPROACH FREEZING THOUGH UNCERTAINTY EXISTS AS MID CLOUDS WILL ALSO BE INCREASING AHEAD OF THE NEXT WAVE.
WITH A LARGE ANTICYCLONE MOVING ACROSS THE EASTERN UNITED STATES IN ITS WAKE. DECENT HEIGHT FALLS WILL FOLLOW THE FRONT WITH COOLER AND DRIER CONTINENTAL AIR MOVING OVER THE WARMER WATERS AROUND THE KEYS THE AREA.
A deep upper trough will cross the region today. Skies should clear out quickly as the trough axis shifts to our east. As northwest winds pour in colder air, most sites should see a hard freeze by daybreak Saturday, with lows in the lower 20s.
250 AM CDT FRI MAR 27 2015 THE REGION WILL REMAIN SANDWICHED BETWEEN EASTERN TROUGHING AND WESTERN RIDGING. WITH NORTHERLY FLOW ALOFT BACKING NORTHWESTERLY AS THE RIDGE LOOSES AMPLITUDE THROUGH EARLY SATURDAY. THOUGH A WEAK BACKDOOR COLD FRONT WILL SWING THE WINDS AROUND TO AN EASTERLY PERSUASION OFF THE CAPROCK THIS MORNING. A LOW AMPLITUDE RIDGE WILL SET UP ACROSS NW MX AND THE DESERT SW WITH A COUPLE OF DISTURBANCES TRAVERSING THE W-NW FLOW ALOFT STRETCHING FROM THE WEST COAST INTO THE HIGH PLAINS.
HIGH PRESSURE WILL SHIFT OVERHEAD THIS AFTERNOON THEN OFF TO THE EAST SATURDAY AHEAD OF A WEAK STORM SYSTEM. THIS SYSTEM WILL SEND A COLD FRONT INTO NORTHERN UTAH SATURDAY AFTERNOON AND SOUTH THROUGH THE AREA SATURDAY NIGHT. WARM DRY RIDGE CONDITIONS WITH PRETTY MUCH CLEAR SKIES ARE EXPECTED ACROSS THE FORECAST AREA TODAY THROUGH TONIGHT. THE RIDGE SHIFTS EAST SAT AS A WEAK SHORT WAVE TROF CROSSES THE NRN ROCKIES AND SENDS A LOW LEVEL COLD FRONT INTO THE NRN CWA DURING THE AFTN. EC SENDS ANOTHER WEAK GRAZING TROF THRU NRN UT SUN NIGHT/MON WITH A LITTLE MORE COOLING WHILE THE GFS MAINTAINS A DRY W TO NW FLOW WITH LITTLE CHANGE IN TEMPS.
120 AM EDT FRI MAR 27 2015 ARCTIC HIGH PRESSURE WILL DROP SLOWLY SOUTHEAST FROM THE CANADIAN PLAINS TONIGHT REACHING THE OHIO VALLEY ON SATURDAY.
STRONG HIGH PRESSURE WILL BRING RECORD HIGH TEMPERATURES THIS AFTERNOON TO MANY LOCALES. A WEAK LOW PRESSURE SYSTEM WILL BRING A LITTLE COOLING AND SOME CLOUDS THIS WEEKEND WITH MAYBE A SPRINKLE OR TWO.
Chilly End of the Week With a Chance of Light Rain and Wet Snow A highly amplified trough is currently over the Great Lakes Region down to the Mid Mississippi Valley Region. Temperatures will be in the lower to middle 30s tonight.
NEAR-RECORD WARMTH TODAY WITH UPPER LEVEL RIDGE AT ITS STRONGEST. WHILE THERE IS NOT MUCH MOISTURE ASSOCIATED WITH THIS LOW. HAVE ISSUED A WIND ADVISORY FOR THE VALLEY LOCALES AND THE ONE MOUNTAIN ZONE WHICH WILL RECEIVE VERY WINDY CONDITIONS SOMEWHERE OTHER THAN THE RIDGES.
649 AM EDT FRI MAR 27 2015 ARCTIC HIGH PRESSURE WILL DROP SLOWLY SOUTHEAST FROM THE PLAINS TODAY REACHING THE OHIO VALLEY ON SATURDAY.
CLEAR SKIES AND LIGHT WINDS AS RIDGE OF HIGH PRESSURE MOVES OVER WILL DROP LOWS INTO THE TEENS EXCEPT FOR RIGHT ALONG THE LAKE WHERE WEAK ONSHORE WIND WILL HOLD TEMPERATURES AROUND 20.
917 PM MST THU FEB 12 2015 AFTERNOON GOES WATER VAPOR IMAGERY SHOWED A HIGH AMPLITUDE UPPER RIDGE FROM THE CENTRAL CA COAST THROUGH THE GREAT BASIN INTO BRITISH COLUMBIA. SURGES OF MID/UPPER LEVEL PACIFIC MOISTURE CONTINUE TO TOP THE RIDGE AND SPREAD SOUTHEAST ACROSS THE REGION. A WARM FRONT EXTENDED NORTH-SOUTH ACROSS THE HIGH PLAINS. 12Z SHORT RANGE MODELS ARE IN GOOD AGREEMENT PROGGING THE SLOW EASTWARD PROGRESSION OF THE WESTERN CONUS UPPER RIDGE THROUGH FRIDAY NIGHT.
320 AM EST FRI FEB 13 2015 HIGH PRESSURE OVER ILLINOIS WILL MOVE OFF THE CAROLINA COAST TONIGHT.
329 AM CST FRI FEB 13 2015 06Z SFC ANALYSIS HAS HIGH PRESSURE FROM THE GREAT LAKES INTO THE LOWER MISSISSIPPI VALLEY. A WEAK LOW WAS NEAR K9V9 IN SOUTH DAKOTA WITH ASSOCIATED WARM AND COLD FRONTS FROM THE DAKOTAS INTO CENTRAL NEBRASKA. A VERY ISOLATED DUSTING OF ACCUMULATION MIGHT OCCUR IN THE HIGHWAY 20 CORRIDOR.
WINDS ARE EXPECTED TO LOWER THIS EVENING AS THE RIDGE BUILDS ACROSS EASTERN CONUS AND PRESSURE GRADIENTS RELAX. UPPER TROUGH MOVES ACROSS.
COLD AIR ADVECTION WILL BECOME NEUTRAL BY THIS AFTERNOON WITH WEAK WARM AIR ADVECTION RETURNING LATE TONIGHT ACROSS THE HIGHER ELEVATION.
One wave diving south through eastern Missouri will generally dissipate as the axis of energy slides east into the ridge axis across Illinois, so mainly flurries are expected from that wave west of Jacksonville to Rushville early this morning.
100 AM EST FRI FEB 13 2015 HIGH PRESSURE CONTINUES TO BUILD IN FROM THE NW THIS EVENING. YESTERDAYS COLD FRONT HAS MOVED INTO CENTRAL FLORIDA. THE ARCTIC AIRMASS SHOULD STILL ALLOW FOR LOW WIND CHILL VALUES ACROSS FAR A COLD AND DRY AIRMASS PUSHING INTO THE STATE TODAY BEHIND A COLD FRONT IS RESULTING IN CHILLY AND VERY WINDY CONDITIONS. THE COMBINATION OF THE WINDS AND THE COLD TEMPERATURES ARE RESULTING IN WIND CHILLS IN THE TEENS AND SINGLE DIGITS ACROSS THE HIGHER ELEVATIONS OF NORTH GEORGIA THIS AFTERNOON.
TONIGHT THROUGH FRIDAY WV IMAGERY STILL SHOWING RIDGE WRN CONUS. TROF ERN CONUS W/ WY UNDER NW FLOW AND INFLUENCES OF A MODEST DIRTY RIDGE AND ONLY MID TO UPR LVL CLOUD. SFC HAS LEE SIDE TROF EXTENDING FROM ERN MT DOWN THRU ERN WY AND ACROSS ERN CO. WITH RELATIVE HIGH P LYING BOTH TO THE E AND W OF THE TROF. AND EVEN THAT WILL LARGELY GO AWAY BY FRIDAY AS RIDGE TRANSLATES EWD.
942 PM MST THU FEB 12 2015 UPDATED AVIATION SECTION 00Z H5 HAND ANALYSIS HAS THE RIDGE AMPLIFIED ALONG THE ENTIRE LEFT COAST OF NOAM WITH THE UPPER LOW CENTERED OVER CHIHUAHUA MEXICO. WATER VAPOR THIS AFTERNOON SHOWS THIS LOW CONTINUING TO RETROGRADE WESTWARD WITH THE A TRUE REX BLOCK EXPECTED TO SET UP OVERNIGHT AS THE RIDGE AXIS DRIFT INLAND AND THE LOW SETTLES OVER THE BAJA REGION. PLENTY OF UPSTREAM ENERGY OVER THE NORTHEAST PACIFIC THAT WILL BE CRASHING INTO THE RIDGE AND BREAKING IT DOWN THROUGH THE WEEKEND. THE ONLY EXCEPTION TODAY WAS GUNNISON WHERE COLD AIR HAS SETTLED INTO THE BASIN WITH TEMPERATURES STRUGGLING TO HIT THE FREEZING MARK AT 3PM.
1045 PM MST Thu Feb 12 2015 Aviation section updated Lift over a cooler airmass to the east combined with plenty of moisture is producing some light rain showers over the east slopes of the Rocky Mountains according to radar imagery and ground reports.
MEANWHILE HIGH PRESSURE IS DOMINATING THE AREAS WEATHER WITH DRY CONDITIONS. PATCHY FOG WAS DEVELOPING ACROSS THE LOWER COLUMBIA BASIN AND THIS AREA WAS EXPANDED INTO PORTIONS OF THE OR/WA BLUE MOUNTAIN FOOTHILLS OVERNIGHT AND INTO TOMORROW MORNING.
128 AM EST FRI FEB 13 2015 HIGH PRESSURE WILL MOVE IN FOR FRIDAY.
304 AM CST FRI FEB 13 2015 QUIET AND WARMER WEATHER TODAY WITH WEST NORTHWEST DOWNSLOPING FLOW WHICH SHOULD LEAD TO SIGNIFICANTLY MILDER TEMPS.
THERE WILL BE A LIGHT DOWNSLOPE WIND THROUGH THE OVERNIGHT, WHICH COULD FAVOR WARMER LOWS. FORECAST SOUNDINGS ARE FAIRLY DRY WITH RELATIVELY LOW PWATS, SO AM A LITTLE CONCERNED THAT MINS COULD RADIATE COOLER THAN WHAT WARMER GUIDANCE SHOWS. OVERALL, SPLITTING HAIRS WITH THE MINIMUM TEMPERATURE GRID, BUT HAVE GONE IN THE MIDDLE OF THE ROAD BETWEEN THE WARMER AND COLDER SOLUTIONS - WITH VALUES IN THE THE LOW 30S.
OFFSHORE HIGH PRESSURE WILL WEAKEN FRIDAY AND A DISSIPATING FRONT WILL MOVE THROUGH FRIDAY NIGHT. OFFSHORE HIGH PRESSURE WILL REBUILD THIS WEEKEND.
1122 PM CST THU FEB 12 2015 FOR 06Z TAFS /ISSUED 918 PM CST THU FEB 12 2015/ THE 03Z SURFACE ANALYSIS AND IR SATELLITE IMAGERY INDICATED THAT MAINLY THIN HIGH CLOUDS WERE MOVING SOUTHEAST THROUGH THE LOWER OHIO VALLEY INTO THE FORECAST AREA AHEAD OF A WEAK SHORT WAVE AT 500 MILLIBARS.
A WEAK WARM FRONT WILL BRING A LITTLE RAIN TO THE AREA TONIGHT MAINLY OVER THE NORTH. A COLD FRONT WILL BRING ANOTHER ROUND OF RAIN FRIDAY AFTERNOON AND EVENING.
Even modest mixing of the warmer air brings temps well into the 40s and have bumped values up slightly given latest trends. The fast upper flow brings a strong cold front south through the Northern Plains tonight, likely entering northern locations near sunrise.
300 AM EST FRI FEB 13 2015 A PRESSURE RIDGE EXTENDING THROUGH THE FORECAST AREA TODAY WILL BE SOUTH OF THE AREA TONIGHT.
FURTHER WEST, AT BNA AND CKV, EXPECT VFR CONDITIONS TO PERSIST THROUGHOUT THE FORECAST PERIOD, AS A COLD CANADIAN AIR MASS SETTLES IN OVER THE AREA AND DRIES OUT THE LOW LEVELS.
1257 AM EST FRI FEB 13 2015 HIGH PRESSURE WILL BE OVER THE FORECAST AREA FRIDAY.
444 AM EST FRI FEB 13 2015 LOW PRESSURE WILL TRACK EAST OF NOVA SCOTIA TODAY WHILE HIGH PRESSURE BUILDS TOWARD THE REGION.
THIS WILL ALMOST CERTAINLY PREVENT TEMPERATURES FROM FALLING QUITE AS MUCH AS INITIALLY THOUGHT SO HAVE RAISED OVERNIGHT LOWS BY A FEW DEGREES ACROSS THE BOARD ALTHOUGH MANY AREAS WILL LIKELY STILL BE NEAR OR BELOW FREEZING TOWARD DAYBREAK ON FRIDAY WITH THE COLDEST AIR STILL YET TO ARRIVE FROM NRN AR/OK. NORTHEAST WINDS 5 KNOTS OVERNIGHT TO GRADUALLY BECOME SOUTHEAST AND SOUTH BY 13/18Z AS HIGH PRESSURE SHIFTS EAST.
1028 PM CST THU FEB 12 2015 UPDATED AVIATION PORTION FOR 06Z TAF ISSUANCE WATER VAPOR LOOP AND RUC ANALYSIS REVEALS AMPLIFIED PATTERN FEATURING WEST COAST RIDGE AND BROAD UPSTREAM TROF ACROSS MUCH OF NORTH AMERICA.
Made minor changes for increased cloud cover and warmer lows tonight. /ISSUED 259 PM CST Thu Feb 12 2015/ (Tonight and Friday) Quiet weather with warmer temperatures on Friday. With clearing skies, light winds, and dry low level air, temperatures will be able to drop into the 30s most areas tonight with some low lying areas able to drop to near freezing.
TONIGHT SHOULD BE DRY AND COLD WITH AN INCREASE IN CLOUD COVER WITH THE APPROACH OF A COLD FRONT.
1152 PM EST THU FEB 12 2015 HIGH PRESSURE WILL BE OVER THE FORECAST AREA FRIDAY.
241 AM MST FRI FEB 13 2015 CONTINUED DRY AND MILD WEATHER WILL LEAD INTO THE WEEKEND AS HIGH PRESSURE REMAINS DOMINANT OVER THE GREAT BASIN FOR ANOTHER DAY. A LARGE OFFSHORE PACIFIC TROUGH CONTINUES TO PUMP MOISTURE INTO THE PACIFIC NORTHWEST AND INTO THE WESTERN RIDGE.
CYCLOGENESIS WILL DEVELOP SEWD ACROSS ONTARIO CANADA THROUGH THE PERIOD AS A STRONG POLAR TROUGH DIGS TO THE NRN GREAT LAKES BY 12Z SAT. THE WARM ADVECTION WILL BOOST TEMPS INTO THE LOWER TO MID 20S FOR LATE TODAY INTO THE EVENING.
1144 PM EST THU FEB 12 2015 HIGH PRESSURE OVER THE CENTRAL PLAINS WILL MOVE ACROSS THE OHIO VALLEY FRIDAY.
A WARM FRONT STRETCHES ACROSS NEBRASKA AND KANSAS.
WINDS ARE EXPECTED TO LOWER AS WE CONTINUE THROUGH THE LATE NIGHT HOURS AS THE RIDGE BUILDS ACROSS EASTERN CONUS AND PRESSURE GRADIENTS RELAX. UPPER TROUGH MOVES ACROSS.
913 PM MST Thu Feb 12 2015 Lift over a cooler airmass to the east combined with plenty of moisture is producing some light rain showers over the east slopes of the Rocky Mountains according to radar imagery and ground reports.
255 AM MST FRI FEB 13 2015 A HIGH PRESSURE SYSTEM WILL SLOWLY BUILD OVER THE REGION THROUGH THE WEEKEND.
SFC FRONT/LOW WILL DRIVE AHEAD OF THE TROUGH. ASSOCIATED WITH THE LOW LEVEL THERMODYNAMICS-SFC FRONT.
TEMPERATURES IN THE FLORIDA KEYS ARE IN THE LOWER 60S AT THIS HOUR. A COLD FRONT WILL PUSH THROUGH THE KEYS AND SURROUNDING WATERS LATER THIS MORNING.
SOUTHERLY WINDS WILL BECOME NORTHWESTERLY BEHIND THE TROUGH PASSAGE. AN UPPER TROUGH OVER THE NORTHWESTERN TERRITORIES OF CANADA EARLY THIS MORNING.
316 AM CST FRI FEB 13 2015 HIGH PRESSURE OVER THE AREA TODAY WILL SLIP SOUTH AND EAST OF OUR AREA AS A FAST MOVING CLIPPER TAKES A SOUTHEASTWARD DIVE FROM SOUTHERN CANADA.
1247 AM EST FRI FEB 13 2015 HIGH PRESSURE WILL SETTLE INTO THE REGION OVERNIGHT INTO TOMORROW.
A VEERING EASTERLY BREEZE AS SURFACE RIDGING PASSES OVERHEAD AND EXPANDS OFF TO THE EAST GOING INTO THE WEEKEND.
Very dry air in the low levels is limiting the amount of snow actually reaching the surface, though a quick shot of flurries/snow showers can be expected for areas along and east of U. Today looks to be a fairly pleasant day for most of the region, as a (brief) return to southerly low level flow will allow temperatures to warm into the mid to upper 40s across most of Missouri, with readings in the low 50s across far southwestern Missouri and southeastern Kansas.
214 AM EST FRI FEB 13 2015 HIGH PRESSURE WILL MOVE IN FOR FRIDAY.
The air mass will continue to modify today, with high temperatures reaching the lower to mid 70s across the region.
VFR CONDITIONS EXPECTED UNTIL AFTER 00Z TONIGHT WHEN MOISTURE AND LIFT FROM INCOMING S/WV TROUGH WILL ALLOW CIGS TO DROP INTO MVFR RANGE. MAIN TROUGH WILL APPROACH MONDAY AND MONDAY NIGHT. WILL KEEP FORECAST DRY AFTER MONDAY NIGHT BUT THIS WILL HAVE TO BE WATCHED WITH MID-UPPER LEVEL LOW LINGERING THROUGH THE WEEK.
919 AM EDT SUN MAR 8 2015 WEAK HIGH PRESSURE WILL BRING A PERIOD OF DRY WEATHER SUNDAY AND MONDAY.
1016 AM MDT SUN MAR 8 2015 SATELLITE WATER VAPOR IMAGES SHOWED AN UPPER RIDGE CENTERED NEAR THE WEST COAST WHILE A CLOSED LOW SLOWLY TRACKED EAST ALONG THE AZ/MEXICO BORDER. MOISTURE WRAPPING NORTH INTO NM AHEAD OF THE UPPER LOW WAS BEING SHUNTED EAST BEFORE HAVING MUCH EFFECT ON OUR AREA. THE UPPER TROUGH EXITS TO THE SOUTHEAST MONDAY MORNING WITH INCREASING SYNOPTIC SUBSIDENCE INDICATED IN THE Q-G VERTICAL VELOCITY FIELDS MONDAY AFTERNOON BUT MAY STILL SEE A FEW LINGERING SHOWERS OVER THE SAN JUANS. SHOWERS WILL COME TO AN END MONDAY NIGHT AS HIGH PRESSURE BUILDS INTO THE REGION.
100 PM EDT SUN MAR 8 2015 HIGH PRESSURE WILL CONTINUE OFFSHORE TODAY THROUGH MONDAY.
923 AM EDT SUN MAR 8 2015 HIGH PRESSURE WILL CONTINUE OFFSHORE TODAY THROUGH MONDAY.
AN UPPER LEVEL CUTOFF LOW PRESSURE SYSTEM CONTINUED TO SLOWLY MOVE THROUGH SOUTHERN AZ THIS MORNING.
SO SEE NO REASON TO NOT GO WITH OR JUST ABOVE THE WARMER MOS MAXES.
OTHERWISE STRONG HIGH PRESSURE BUILDING INTO THE AREA WILL MAINTAIN WARM AND DRY CONDITIONS THROUGH THE FIRST HALF OF THE WEEK. MID LEVEL RIDGING ALONG THE WEST COAST CONTINUES TO INDUCE A GENERALLY DRY NORTHWESTERLY FLOW ALOFT DOWNSTREAM ACROSS THE GREAT BASIN THIS MORNING. SREF SUGGESTS WEAK INSTABILITY WILL DEVELOP ALONG THE HIGHER TERRAIN FROM THE UINTAS INTO CENTRAL UT THIS AFTERNOON ASSOCIATED WITH COOLING ALOFT. THIS COOLING WILL ALSO RESULT IN A SLIGHT DOWNWARD TREND IN TEMPS ACROSS THE HIGHER TERRAIN.
706 AM EDT SUN MAR 8 2015 A COUPLE OF WEAK COLD FRONTS MAY BRING FLURRIES OR WIDELY ESPECIALLY NEAR THE BERKSHIRES. WHILE ITS SURFACE REFLECTION IS WEAK COLD FRONT WHICH WILL DO LITTLE MORE THAN REINFORCE W FLOW. SKIES START OUT CLEAR TONIGHT BEFORE MOISTURE AHEAD OF NEXT SHORT WAVE AND WEAK COLD FRONT ARRIVES OVERNIGHT. NOT MUCH MOISTURE OR CONVERGENCE ALONG COLD FRONT. TEMPS MODERATE TUE BUT LOW LEVEL SW FLOW WILL KEEP SOUTH COASTAL AREAS COOLER THAN NORMAL. MILDEST DAY OF THE WEEK WILL BE WED AS WINDS TURN NW BEHIND COLD FRONT WITH COLDER AIR LAGGING TO THE NORTH. THE POSITION OF THE HIGH AND HOW QUICKLY IT DEPARTS WILL PLAY A BIG ROLE IN PTYPE.
UPPER LEVEL LOW SOUTH OF ARIZONA WILL OPEN AND MOVE EAST. BUT TROUGH AXIS REMAINS WEST OF THE AREA THROUGH THE SHORT TERM.
ANOTHER MOSTLY CLEAR AND MILD MORNING ACROSS THE REGION WITH AN UPPER LEVEL RIDGE STILL FIRMLY IN CONTROL OF THE WEATHER ACROSS MOST OF THE PAC NW. A DRY NORTHWEST FLOW WILL CONTINUE OVER THE REGION WITH AN UPPER RIDGE AXIS CENTERED TO OUR WEST.
BENIGN ZONAL FLOW ALOFT AND AMORPHOUS RIDGING AT THE SURFACE WILL GIVE US FAIR WEATHER TODAY. MODELS AGREE ON WARM AIR ADVECTION/ISENTROPIC LIFT AHEAD OF AN APPROACHING LARGE SCALE MID/UPPER LEVEL TROUGH BRINGING INCREASING CLOUDS FOR MONDAY. A STRONG UPPER LEVEL TROUGH ACROSS THE SW CONUS WILL LEAD TO PHASING OF THE SOUTHERN STREAM AND NORTHERN STREAM JET ACROSS THE OHIO RIVER VALLEY THROUGH THE EXTENDED.
CLOUDS WILL DECREASE TONIGHT AS SFC TROF MOVES OFFSHORE AND DEEP LAYER MOISTURE DECREASES AHEAD OF THE BUILDING HIGH OVER THE OHIO VALLEY. THE CENTER OF HIGH PRESSURE WILL REACH WESTERN PA MONDAY AFTERNOON AND CENTRAL PA IN THE EVENING. HIGHS WILL WARM ABOVE FREEZING EVERYWHERE FOR THE FIRST TIME IN A WHILE. RANGING FROM THE LOWER TO MID 30S NORTH TO THE LOWER TO MIDDLE 40S SOUTH. UPPER LOW NOW OVER SRN CALIF IS FORECAST TO MOVE EVER-SO-SLOWLY EAST INTO THE CENTRAL/SRN PLAINS BY MID WEEK. A WEAK TROUGH WILL MOVE THROUGH TONIGHT INTO MONDAY MORNING. THE LOW TEMPERATURE OF 1 BELOW ZERO YESTERDAY MORNING AT HARRISBURG IS THE COLDEST MINIMUM TEMPERATURE ON RECORD FOR THE MONTH OF MARCH.