Aikyam-Lab/Synoptic-Bench huggingface dataset:
UPPER LOW SPINNING OVER SOUTHERN SASKATCHEWAN WITH 100 KT UPPER LEVEL JET ROUNDING THE BASE OF THE LOW FROM MONTANA INTO SOUTHERN MANITOBA THIS IS PULLING MID LEVEL MOISTURE INTO WESTERN AND CENTRAL NORTH DAKOTA SO EXPECT INCREASING THIN MID AND HIGH LEVEL CLOUDINESS OVERNIGHT. EARLY EVENING DEWPOINTS IN THE LOWER 30S OVER THE SOUTHWEST AND SOUTH CENTRAL HAVE RECOVERED INTO THE MID TO UPPER 30S. WILL REMAIN ON THE LOW SIDE OF GUIDANCE THOUGH. A BREEZY AND DRY AFTERNOON AND EARLY EVENING WILL CONTINUE ACROSS WESTERN AND CENTRAL NORTH DAKOTA IN THE DRY SLOT OF THE LOW ACROSS SOUTHWEST SASKATCHEWAN. A WEAK TROUGH EXTENDING SOUTH OF THE AFOREMENTIONED LOW THAT IS FORECAST TO BE OVER CENTRAL MANITOBA MAY PROVIDE SUFFICIENT FORCING AND INSTABILITY FOR ISOLATED SHOWER AND THUNDERSTORM ACTIVITY SOUTHWEST AND CENTRAL MONDAY AFTERNOON.
413 AM EDT MON SEP 7 2015 HIGH PRESSURE WILL KEEP VERY WARM CONDITIONS ACROSS THE REGION TODAY. THE HIGH WILL BEGIN TO BREAK DOWN BY TUESDAY. THIS WILL ALLOW A COLD FRONT TO APPROACH THE REGION FROM THE NORTHWEST. THE COLD FRONT WILL EVENTUALLY IMPACT THE AREA BY MID WEEK. A MID LEVEL RIDGE WILL REMAIN ACROSS THE OHIO VALLEY TODAY. IT WILL BE VERY WARM AND HUMID WITH HIGHS MOST LOCATIONS REACHING THE LOWER 90S. MID LEVEL RIDGE WILL BREAK DOWN AS MID LEVEL TROUGHING DIGS INTO THE NORTHERN AND CENTRAL PLAINS INTO MID WEEK. A WAVE OF LOW PRESSURE WILL APPROACH THE WESTERN GREAT LAKES BY TUESDAY MORNING. THE WAVE OF LOW PRESSURE WILL MOVE NORTHEAST ACROSS THE WESTERN GREAT LAKES. IT WILL BE ANOTHER WARM AND HUMID DAY WITH HIGHS RANGING FROM THE UPPER 80S TO THE LOWER 90S.
AN ELEVATED WARM FRONT OVER THIS AREA MAY BE JUST ENOUGH TO KEEP CONVECTION FIRING INTO THE LATE NIGHT HOURS OVER THE WESTERN NEBRASKA PANHANDLE. IT WILL BE SLIGHTLY COOLER TUESDAY WITH HIGHS MAINLY IN THE 70S.
647 AM EDT MON SEP 7 2015 HIGH PRESSURE WILL KEEP VERY WARM CONDITIONS ACROSS THE REGION TODAY. THE HIGH WILL BEGIN TO BREAK DOWN BY TUESDAY. THIS WILL ALLOW A COLD FRONT TO APPROACH THE REGION FROM THE NORTHWEST. THE COLD FRONT WILL EVENTUALLY IMPACT THE AREA BY MID WEEK. A MID LEVEL RIDGE WILL REMAIN ACROSS THE OHIO VALLEY TODAY. IT WILL BE VERY WARM AND HUMID WITH HIGHS MOST LOCATIONS REACHING THE LOWER 90S. MID LEVEL RIDGE WILL BREAK DOWN AS MID LEVEL TROUGHING DIGS INTO THE NORTHERN AND CENTRAL PLAINS INTO MID WEEK. A WAVE OF LOW PRESSURE WILL APPROACH THE WESTERN GREAT LAKES BY TUESDAY MORNING. THE WAVE OF LOW PRESSURE WILL MOVE NORTHEAST ACROSS THE WESTERN GREAT LAKES. IT WILL BE ANOTHER WARM AND HUMID DAY WITH HIGHS RANGING FROM THE UPPER 80S TO THE LOWER 90S.
DAYTIME TEMPERATURES WILL CONTINUE ON A WARMING TREND THROUGH AT LEAST MIDWEEK AS HIGH PRESSURE BUILDS OVER THE REGION. TEMPERATURES TODAY WILL BE ABOUT 5 DEGREES WARMER THAN YESTERDAY. AS HIGH PRESSURE ALOFT CONTINUES TO BUILD OVER THE STATE.
THIS EVENING THROUGH MONDAY NIGHT 19Z SURFACE ANALYSIS SHOWED COLD FRONT FROM WESTERN MN TO NORTHWEST KS. BUT THEN RETURN FLOW RAPIDLY DEVELOPS AS THE HIGH MOVES EAST. EXCEPT SLIGHTLY COOLER IN THE WEST WHERE CLOUD COVER WILL BE LOWEST. MORNING PRECIPITATION MOVES NORTHEAST AS WEAK TROUGH/WARM FRONT DEVELOPS FROM SOUTHEAST MT INTO EASTERN NE.
Will take a blend approach of the two and keep the highest pops across the central zones. Farther west, there is actually a bit of downglide in the the wake of the low level pressure perturbation.
301 AM CDT MON SEP 7 2015 UPPER LOW STARTING TO CUT OFF FROM THE MAIN UPPER LONG WAVE TROUGH THAT IS HANGING ALONG THE EAST COAST. THE UPPER LOW WILL NOT MOVE A GREAT DEAL FROM THE GULF COAST OVER THE NEXT SEVERAL DAYS. THIS SYSTEM WILL BE MOST RESPONSIBLE FOR THE UNSETTLED WEATHER DAY AFTER DAY AS COOLER AIR ALOFT WILL HELP LAPSE RATES REMAIN MODERATE. THE UPPER LOW THEN OPENS UP AND IS ABSORBED BY A BROAD EXPANSIVE UPPER TROUGH THAT WILL TAKE UP THE ENTIRE CONUS BY THE END OF THE WEEK.
549 AM CDT MON SEP 7 2015 The upper level ridge that has kept the Ozarks in a summer like weather pattern will hold on for one more day this Labor Day. The upper level trough that will push a forecast cold front into the region continues to be a bit slower in suppressing the ridge to the south. The upper level trough will slowly begin to win out over the ridge with the advertised cold front slowly making its way into portions of the Ozarks by late tonight into early Tuesday morning.
311 AM CDT MON SEP 7 2015 The upper level ridge that has kept the Ozarks in a summer like weather pattern will hold on for one more day this Labor Day. The upper level trough that will push a forecast cold front into the region continues to be a bit slower in suppressing the ridge to the south. The upper level trough will slowly begin to win out over the ridge with the advertised cold front slowly making its way into portions of the Ozarks by late tonight into early Tuesday morning.
JUST A TAD COOLER. MLCAPE VALUES REMAIN MODEST WITH DEWPOINTS THIS HIGH. BDL UPPER LOW ACROSS THE GULF COAST STATES WILL CONTINUE TO RETROGRADE INTO THE FAR WESTERN GULF THROUGH THE LATTER HALF OF THE WEEK WHILE BECOMING AN OPEN WAVE.
Strong high pressure will build across the interior of NorCal this week as ridging over the eastern Pacific links up with high pressure over the Desert Southwest. Subsidence resulting from the building ridge along with offshore flow will also continue a very dry airmass across the region.
108 AM CDT MON SEP 7 2015 A COLD FRONT WAS LOCATED FROM NORTHWEST ONTARIO THROUGH NORTH CENTRAL MINNESOTA INTO FAR SOUTHWEST MINNESOTA AS OF 20Z. DUE TO FREEZING LEVELS AROUND 13 TO 14KFT. IT WILL COOL INTO THE FIFTIES OVER OUR WESTERN ZONES BUT REMAIN IN THE LOWER TO MIDDLE SIXTIES OVER NORTHWEST WISCONSIN. HIGH PRESSURE WILL BUILD IN ON MONDAY AND IT WILL BE COOLER WITH LOWER HUMIDITY. THE CLOSED UPPER LOW IS LOCATED NORTH OF THE WINNIPEG LAKES REGION OF MANITOBA BY 12Z TUESDAY.
UPPER LEVEL LOW PRESSURE SPINNING OVER SOUTHERN SASKATCHEWAN WITH A 100KT UPPER LEVEL JET ROUNDING THE BASE OF THE LOW INTO THE WESTERN DAKOTAS. DESPITE CLOUDS SOUTHWEST VERY DRY DEWPOINTS IN THE 30S RESULTING IN TEMPERATURES IN THE LOW 40S AND EVEN A FEW UPPER 30S. COUPLED WITH FORCING ALOFT EXPECT SHOWERS TO DEVELOP NEAR THE TROUGH AXIS AS IT SLOWLY MOVES EAST TODAY. UPPER LOW CONTINUES EAST ACROSS SOUTH CENTRAL CANADA.
THERE IS A SMALL CHANCE FOR STORMS LATE THIS AFTERNOON OVER NORTHWEST INDIANA AND SOUTHWEST LOWER MICHIGAN AS A COLD FRONT APPROACHES. FOLLOWED BY COOLER TEMPERATURES FOR THE LATTER PART OF THE WEEK. PREFNTL TROUGH XPCD TO WASH OUT TONIGHT IN RESPONSE TO GENERAL DEEPENING OF SFC FNTL ZONE SEWD OF POTENT SW CROSSING SRN CANADA BACK ACROSS THE CORN BELT. AS SUCH AND IN AGREEMENT W/SPECTRAL GUIDANCE BACKED OFF PRIOR POPS OUTSIDE FAR NW AS BTR THETA-E RIDGING/LL MSTR FLUX CONFINED WWD ERN IA NEWD THROUGH ERN WI AGAIN. INCREASED CLOUD COVER MAY KEEP HIGHS A FEW DEGREES COOLER BUT STILL EXPECT UPPER 80S IN MOST LOCATIONS WITH DEWPOINTS AGAIN AROUND 70F AND HEAT INDICES IN THE LOW TO PERHAPS MID 90S.
631 AM EST TUE FEB 9 2016 LINGERING LIGHT SNOW WILL TAPER TO FLURRIES THIS MORNING AS LOW PRESSURE MOVES WELL EAST OF THE AREA. THIS LOW AND AN UPPER LEVEL TROUGH WILL PROVIDE CLOUDS ALONG WITH A FEW SNOW FLURRIES ACROSS THE REGION TODAY. ANOTHER WEAK LOW WILL PASS BY OFFSHORE ON WEDNESDAY WITH A TROUGH EXTENDING WESTWARD INTO NEW ENGLAND.
A STRONG RIDGE OF HIGH PRESSURE WILL BRING QUIET AND DRY WEATHER TO NORTHERN AND CENTRAL NEVADA THIS WEEK. PATCHY FREEZING FOG FORMING ACROSS PORTIONS OF NORTHERN AND CENTRAL NV IMPACTING THE KEKO TERMINAL. A STRONG RIDGE OF HIGH PRESSURE WILL BRING QUIET AND DRY WEATHER TO NORTHERN AND CENTRAL NEVADA THIS WEEK.
A STRONG RIDGE OF HIGH PRESSURE WILL BRING QUIET AND DRY WEATHER TO NORTHERN AND CENTRAL NEVADA THIS WEEK.
Have forecast on the low end of model guidance, which puts MinRH in the 28-32 percent category for areas east of a Council Grove to Holton line. If clouds are quicker or slower to build in, the resultant temperatures will be warmer or colder than currently forecast. Over the weekend an upper ridge builds over the plains ahead of the next wave.
WINDY AND COOLER TODAY WITH VERY HAZARDOUS MARINE CONDITIONS.
The result will be a sharp warm up ahead of the next cold front which passes through the area Wednesday night.
LARGE UPPER TROUGH REMAINS ANCHORED ACROSS THE EASTERN U. THOUGH THE TROUGH AXIS IS EAST OF TN.
527 AM CST TUE FEB 9 2016 H5 SIMILAR PATTERN TO YESTERDAY WITH WESTERN CONUS RIDGE AND DEEP TROUGH OVER THE EASTERN CONUS. TEMPERATURES IN THE LOW 30S OVER NORTH CENTRAL ONEILL VICINITY AND TO THE WEST OF HIGHWAY 83 IN THE UPPER 30S TO AROUND 40. LOWS IN THE MAINLY IN THE LOWER 20S WITH TEENS ONEILL.
ALTHOUGH MOST OF THE CLEAR SKIES ARE ON THE EDGE OF THE HIGHS WHILE THE DEVILS LAKE BASIN HAS SEEN CLOUD COVER MOVE IN FROM THE NORTH. WHILE THE WEST WILL BE IN A SLIGHTLY WARMER AIR MASS AND READINGS SHOULD TOP OUT IN THE TEENS.
SLICK TRAVEL CONDITIONS ARE ALREADY OCCURRING AS SOME SNOWFALL HAS MELTED AND REFROZEN AS TEMPERATURES HAVE BELOW FREEZING OVER THE LAST 3 HOURS. MOST MAJOR IMPACTS ARE OCCURRING IN HIGHER ELEVATIONS AND ON BRIDGES.
CHATTANOOGA AIRPORT, TN 34 21 33 20 / 60 30 10 0 KNOXVILLE MCGHEE TYSON AIRPORT, TN 31 19 29 17 / 70 30 20 10 OAK RIDGE, TN 32 20 29 17 / 70 40 20 10 TRI CITIES AIRPORT, TN 29 18 25 13 / 70 50 40 10 NC.
THE REMAINDER OF THE FORECAST PERIOD SHOULD SEE MOSTLY FLURRIES RETREATING NORTH AS THE UPPER TROUGH SHIFTS SLIGHTLY NORTH AND EAST OF THE STATE AND COLD ADVECTION AND OROGRAPHIC EFFECTS DOMINATE.
STRONG HIGH PRESSURE ALOFT ACROSS THE INTERIOR WEST WILL REMAIN THE DOMINANT WEATHER FEATURE THROUGH THE BALANCE OF THE WORK WEEK.
635 AM EST TUE FEB 9 2016 THE WEATHER WILL REMAIN ACTIVE ACROSS EASTERN KENTUCKY TODAY THROUGH WEDNESDAY DUE TO A LARGE AREA OF LOW PRESSURE ALOFT THAT IS CURRENTLY SPINNING IN PLACE OVER THE EASTERN GREAT LAKES REGION. ISOLATED/SCATTERED UPSLOPE-INDUCED SNOW SHOWERS WILL END FROM WEST TO EAST WEDNESDAY EVENING IN WAKE OF A DEPARTING TROUGH AXIS AS SURFACE RIDGING BUILDS EASTWARD AND INTO THE REGION. BUT SHOULD SEE ANY DEVELOPMENT REMAIN NEAR AND WEST OF THE INTERSTATE 71 CORRIDOR IF THIS SHALLOW LIFT IS EVEN ENOUGH TO GENERATE ANY SEMBLANCE OF SNOW ALONG A COLD FRONT.
HIGHS WILL BE A BIT WARMER THAN YESTERDAY BUT WILL STILL REMAIN IN THE UPPER 60S TO LOWER 70S. WINDS WILL BE LIGHT AGAIN TONIGHT BUT SLIGHTLY HIGHER DEWPOINTS SHOULD KEEP OVERNIGHT LOWS SEVERAL DEGREES WARMER. AN UPPER LEVEL RIDGE CURRENTLY ACROSS THE WESTERN CONUS WILL SHIFT SLIGHTLY EAST BY WEDNESDAY AND WE SHOULD SEE SOUTHWESTERLY FLOW RETURN TO THE REGION AS SURFACE CYCLOGENESIS COMMENCES IN THE CENTRAL PLAINS.
THE H5 TROUGH AND H25 JET LIFT EAST-NORTHEAST TODAY. OVERNIGHT LOWS TONIGHT SHOULD BE SLIGHTLY WARMER INTO THE LOW 40S OVER MUCH OF THE REGION.
527 AM CST TUE FEB 9 2016 FOR 12Z TAFS /ISSUED 317 AM CST TUE FEB 9 2016/ UPPER LOW OVER THE GREAT LAKES WILL SPIN A FEW DISTURBANCES TOWARDS THE TN VALLEY TODAY. ESPECIALLY IN THE HIGHER TERRAIN LOCATIONS. OTHERWISE EXPECT A VERY COLD DAY WITH HIGHS IN THE LOWER 30S IF WE ARE LUCKY. FOR TONIGHT THE UPPER LOW PUSHES EAST OF THE CWA TAKING THE CHC OF SN WITH IT.
637 AM EST TUE FEB 9 2016 COLDER WITH SNOW SHOWERS THROUGH WEDNESDAY AS A COLD FRONT PASSES TONIGHT FOLLOWED BY SLOW MOVING LOW PRESSURE. LOCATIONS SOUTH OF PITTSBURGH AND INTO THE RIDGES SHOULD SEE SEVERAL HOURS OF LIGHT TO MODERATE SNOW THROUGH THE AFTERNOON/EARLY EVENING AS THE LIFT WEAKENS AND DEPARTS. SNOW SHOWER COVERAGE SHOULD DIMINISH ACROSS THE LOWLANDS TONIGHT. BUT WILL CONTINUE FOR THE RIDGE COUNTIES AS THE FLOW TURNS TO THE NORTHWEST AND THE DENDRITIC GROWTH ZONE DESCENDS UNDER COLD AIR ADVECTION. TEMPERATURES WILL CONTINUE THEIR DOWNWARD TREND AS HIGHS WILL REMAIN NEAR OR BELOW FREEZING TODAY. TAX H500 TROUGH AXIS SHIFTS EAST EARLY ON WEDNESDAY AS CLOSED LOW OPENS UP. ESPECIALLY IN THE RIDGES. ANOTHER INCH OR SO IS POSSIBLE IN THE HIGHER ELEVATIONS.
A PERSISTENT WEATHER PATTERN WILL CONTINUE AS A RIDGE OF HIGH PRESSURE RESIDES OVER THE REGION. WILL AGAIN SEE SOME NEAR RECORD HIGH TEMPERATURES TODAY IN THE HIGHER ELEVATIONS. MEANWHILE AN INVERSION WILL KEEP TEMPERATURES COOLER IN THE LOWER ELEVATIONS AND THERE WILL BE SOME PATCHY FOG AND LOW CLOUDS THIS MORNING WITH MOST BURNING OFF BY AFTERNOON BUT WILL RETURN OVERNIGHT.
TEMPS ARE CURRENTLY IN THE LOW TO MID 30S ACROSS THE NORTHERN AREAS. A GRADUAL WARMUP IS EXPECTED THE REST OF THE WEEK AS THE CURRENT AMPLIFIED WESTERN RIDGE/EASTERN TROUGH BECOMES MORE PROGRESSIVE AND RESULTS IN MID/UPPER HEIGHTS RISING AT THE END OF THE WEEK AND INTO THE WEEKEND.
TEMPERATURES WILL GRADUALLY TREND COOLER THROUGH THE THE REST OF THE WEEK.
AND WARMER NORTHWEST FLOW ALOFT WILL PERSIST ACROSS COLORADO. BREEZY CONDITIONS EXPECTED TO CONTINUE ACROSS THE HIGHER PEAKS AND DOWN THE FRONT RANGE FOOTHILLS AND PARK COUNTY WITH SUFFICIENT CROSS MOUNTAIN COMPONENT. INVERSIONS SHOULD BE ABLE TO SET UP FARTHER EAST ACROSS THE PLAINS BUT SOME WIND TO KEEP THINGS MORE MIXED ON THE RIDGES. STRONG UPPER RIDGING IS FORECAST OVER THE WESTERN U.
OTHERWISE COLD HIGH PRESSURE WILL BE IN PLACE THROUGH MID-WEEK. THIS WILL BE FOLLOWED BY AN EVEN COLDER ARCTIC HIGH PRESSURE FOR THE WEEKEND. WITHIN A VERY DEEP UPPER TROUGH OVER THE EASTERN US. WETBULB PROFILES SUGGEST ONLY A VERY SHALLOW LAYER BELOW ~1000 FT WOULD REMAIN ABOVE FREEZING. COLD ADVECTION WILL CONTINUE TONIGHT AND WEDNESDAY WITH THE HIGH PRESSURE BUILDING IN FROM THE NORTHWEST. THE FIRST MID/UPPER COLD TROUGH WILL MAXIMIZE OVER THE REGION WEDNESDAY BEFORE BEGINNING TO LIFT OUT.
HIGH PRESSURE WILL START TO BUILD INTO THE REGION TONIGHT WITH DRY WEATHER AND WELL BELOW NORMAL TEMPERATURES EXPECTED. WEDNESDAY WILL REMAIN DRY AS HIGH PRESSURE REMAINS IN PLACE. TEMPERATURES MAY BE A DEGREE OR TWO WARMER THAN TODAY BUT THAT WILL REMAIN BELOW NORMAL.
Strong high pressure will remain over the region this week and temperatures will remain well above normal for this time of year.
A SECOND LARGER AREA WAS IN THE LOWER TREASURE VALLEY AND GEM COUNTY. HIGH TEMPERATURES TODAY WILL BE LOWER THAN YESTERDAY IN THE LOWER TREASURE VALLEY AND MOST OF EASTERN OREGON. INTERESTING TO NOTE THAT THE 500 MB RIDGE IS THE STRONGEST ON RECORD BY HEIGHT AND TEMPERATURE FOR THE MONTHS OF FEBRUARY MARCH AND APRIL AS FAR BACK AS 1948.
HIGH PRESSURE WILL BEGIN TO BUILD IN FROM THE WEST. THE HIGHWAY 20 CORRIDOR WILL BE NEAR ADVISORY CRITERIA. CONSENSUS IS TO KEEP THE HIGHEST QPF VALUES AND SNOWFALL AMOUNTS OVER THE FAR SOUTHWEST AND SOUTHERN PORTIONS OF THE CWA.
WITH BROAD AND DEEP UPPER LEVEL TROUGH. WITH THE UPPER LEVEL TROUGH EXPECTED TO SHIFT MORE EWD THIS EVENING. EXPECT SFC RIDGING INFLUENCES TO TAKE HOLD AND PROVIDE DRY CONDITIONS THRU THU. WILL REMAIN UNSEASONABLE COLD WITH TEMPS REMAINING BELOW FREEZING FOR THE MOST PART FROM TODAY THRU THU MORNING. THE ABOVE FREEZING PERIOD WILL ONLY BE SHORT LIVED FROM THU AFTERNOON INTO THE THU EVENING HRS. BEFORE TEMPS FALL BELOW FREEZING AGAIN THU NIGHT.
428 AM CST TUE FEB 9 2016 THE DRY COLD FRONT THAT MOVED THROUGH THE REGION IS PRODUCING DEW POINTS IN THE TEENS THIS MORNING. BY TOMORROW MORNING HIGH PRESSURE WILL HAVE SETTLED INTO THE REGION AND WILL GRADUALLY SLIDE INTO THE GULF DURING THE DAY ON WEDNESDAY.
EARLY VISIBLE SATELLITE PICTURES SHOW SKIES ARE MOSTLY CLOUDY WITH TEMPERATURES IN THE LOWER TO MID 60S ALONG THE ISLAND CHAIN. A TROUGH OF LOW PRESSURE IS DRAPED FROM THE NORTHWEST BAHAMAS TO ACROSS THE NORTH CENTRAL COAST OF CUBA. WITH ANOTHER TROUGH ALIGNED ACROSS SOUTH CENTRAL FLORIDA AND THE ADJACENT ATLANTIC AND GULF WATERS.
RIDGE OF HIGH PRESSURE IS DRAPED ACROSS DEEP SOUTH TEXAS WHICH WILL KEEP WINDS ON THE LIGHTER SIDE. HIGHLY AMPLIFIES RIDGE WILL VIRTUALLY REMAIN IN PLACE ACROSS THE WESTERN CONUS WITH A TROUGH ACROSS THE EASTERN CONUS. THIS LOW PRESSURE AREA WILL WEAKEN THROUGH THE NEXT 24 HOURS WHILE SHIFTING SOUTHWARD SO THE HIGH LEVEL MOISTURE WILL DECREASE OVERNIGHT TONIGHT. WITH HIGH PRESSURE ACROSS THE AREA AND WEAK LOWER TROPOSPHERIC FLOW. HIGH TODAY WILL BE IN THE LOWER TO MID 70S WITH MOSTLY SUNNY SKIES. WEDNESDAY WILL BE A LITTLE WARMER WITH HIGHS IN THE MID TO UPPER 70S.
940 AM EST TUE FEB 9 2016 MUCH COLDER WITH SNOW SHOWERS THROUGH WEDNESDAY AS SLOW MOVING LOW PRESSURE MOVES EAST. BAND OF BETTER SNOW TRANSITIONING NORTH AND EAST ACROSS SOUTHWEST PA AND NORTHERN WV AS CLOSED LOW AND DEFORMATION ZONE MOVE EAST. SNOW WILL BEGIN TO DIMINISH LATE AFTERNOON/EARLY EVENING AS THE LIFT WEAKENS AND DEPARTS WITH THE CLOSED LOW. SNOW SHOWERS TONIGHT WILL BE MOST NUMEROUS RIDGE COUNTIES AS THE FLOW TURNS TO THE NORTHWEST AND THE DENDRITIC GROWTH ZONE DESCENDS UNDER COLD AIR ADVECTION. H500 TROUGH AXIS SHIFTS EAST EARLY ON WEDNESDAY AS CLOSED LOW OPENS UP. ESPECIALLY IN THE RIDGES. ANOTHER INCH OR SO IS POSSIBLE IN THE HIGHER ELEVATIONS.
546 AM CST TUE FEB 9 2016 Upper-level troughing will pervade from the Great Lakes through the eastern CONUS this week and into the weekend, resulting in chilly but mainly dry conditions throughout the CWA. Fluctuations in the strength and westward extent of the upper trough will allow highs to vary from the upper 20s to the middle 40s this week, and will also be moderated by cloud cover from weak, passing waves dropping down the back side of the upper trough. Broad, weak lift associated with the right entrance region of an upper jet streak will combine with pacific moisture rounding the ridge across the western U.
Underneath this dry flow the low levels will generally warm, although interruptions due to a frontal boundary may occur on Thur and Sat.
OTHERWISE COLD HIGH PRESSURE WILL BE IN PLACE THROUGH MID-WEEK. THIS WILL BE FOLLOWED BY AN EVEN COLDER ARCTIC HIGH PRESSURE FOR THE WEEKEND. WITH THE COLD AIR LAGGING BEHIND THE COLD FRONT. THE COLD FRONT WILL ADVANCE EAST THROUGH THE REGION THIS MORNING WITH CAA THIS AFTERNOON IN WESTERLY WINDS AT 10-20 MPH. AS THE SURFACE TEMPERATURES WARM INTO THE LOWER TO MID 40S. TEMPERATURES NEAR THE SURFACE WILL BE WELL ABOVE FREEZING. COLD ADVECTION WILL CONTINUE TONIGHT AND WEDNESDAY WITH THE HIGH PRESSURE BUILDING IN FROM THE NORTHWEST. THE FIRST MID/UPPER COLD TROUGH WILL MAXIMIZE OVER THE REGION WEDNESDAY BEFORE BEGINNING TO LIFT OUT.
COULD EVEN SEE SOME LOCATIONS IN SOUTH CENTRAL KS CLIMB INTO THE LOW 60S AS SURFACE WINDS SHIFT AROUND TO THE SW. WHICH WILL PUSH ANOTHER WEAK COLD FRONT ACROSS KS.
405 AM CST TUE FEB 9 2016 A LARGE UPPER RIDGE REMAINS OVER THE WRN CONUS WHILE A DEEP UPPER TROUGH HOLDS OVER THE ERN CONUS. GENERALLY DRY WEATHER WITH OCCASIONAL COLD FRONTS CAN BE EXPECTED.
STRONG HIGH PRESSURE ALOFT ACROSS THE INTERIOR WEST WILL REMAIN THE DOMINANT WEATHER FEATURE THROUGH THE BALANCE OF THE WORK WEEK. WATER VAPOR LOOP SHOWS A RIDGE DOMINATING THE WEST. THE STRONG UPPER RIDGE ACROSS THE INTERIOR WEST WILL REMAIN THE DOMINANT FEATURE THROUGH AT LEAST THE END OF THE WEEK. THE UPPER RIDGE WILL SHOW SLIGHT WEAKENING LATE IN THE WEEK. MAX TEMPS MAY ACTUALLY CLIMB A BIT DUE TO THE WARMER START IN THE MORNING.
TOMORROW WILL BE ABRUPTLY WARMER ACROSS THE REGION.
355 AM MST TUE FEB 9 2016 A STRONG RIDGE OF HIGH PRESSURE WILL PERSIST ACROSS THE WESTERN U.
There will be lingering clouds and flurries from central Missouri into the eastern Ozarks this morning beneath the mid level shear axis on the backside of the deep eastern upper level trough. Much of the Missouri Ozarks will remain below freezing today while highs climb into the 30s near the Kansas and Oklahoma borders.
/ISSUED 428 AM CST TUE FEB 9 2016/ THE DRY COLD FRONT THAT MOVED THROUGH THE REGION IS PRODUCING DEW POINTS IN THE TEENS THIS MORNING. BY TOMORROW MORNING HIGH PRESSURE WILL HAVE SETTLED INTO THE REGION AND WILL GRADUALLY SLIDE INTO THE GULF DURING THE DAY ON WEDNESDAY.
WE WILL REMAIN IN NORTHWEST FLOW AS THE UPPER LEVEL RIDGE IN THE WEST AND TROUGH IN THE EAST DEAMPLIFY.
809 AM EST TUE FEB 9 2016 COLDER WITH SNOW SHOWERS THROUGH WEDNESDAY AS A COLD FRONT PASSES TONIGHT FOLLOWED BY SLOW MOVING LOW PRESSURE. LOCATIONS SOUTH OF PITTSBURGH AND INTO THE RIDGES SHOULD SEE SEVERAL HOURS OF LIGHT TO MODERATE SNOW THROUGH THE AFTERNOON/EARLY EVENING AS THE LIFT WEAKENS AND DEPARTS. SNOW SHOWER COVERAGE SHOULD DIMINISH ACROSS THE LOWLANDS TONIGHT. BUT WILL CONTINUE FOR THE RIDGE COUNTIES AS THE FLOW TURNS TO THE NORTHWEST AND THE DENDRITIC GROWTH ZONE DESCENDS UNDER COLD AIR ADVECTION. TEMPERATURES WILL CONTINUE THEIR DOWNWARD TREND AS HIGHS WILL REMAIN NEAR OR BELOW FREEZING TODAY. TAX H500 TROUGH AXIS SHIFTS EAST EARLY ON WEDNESDAY AS CLOSED LOW OPENS UP. ESPECIALLY IN THE RIDGES. ANOTHER INCH OR SO IS POSSIBLE IN THE HIGHER ELEVATIONS.
/ISSUED 330 AM CST TUE FEB 9 2016/ NORTH TEXAS IS CURRENTLY SITUATED BETWEEN A DEEP UPPER TROUGH ACROSS THE EASTERN HALF OF THE COUNTRY AND A RIDGE ACROSS THE WEST. NEAR NORMAL TO SLIGHTLY ABOVE-NORMAL TEMPS ARE EXPECTED ACROSS THE AREA TODAY AS THE UPPER RIDGE NOSES IN FROM THE WEST. THE EXCEPTION WILL BE OVER THE NORTHEAST COUNTIES WHERE INFLUENCE FROM THE EAST COAST TROUGH WILL BE FELT. HIGHS WILL RANGE FROM THE LOW 50S IN THE NORTHEAST TO THE MOD 60S ACROSS THE WEST. SOUTHWEST WINDS WILL DEVELOP WEDNESDAY AHEAD OF ANOTHER COLD FRONT.
THE WEATHER WILL REMAIN ACTIVE ACROSS EASTERN KENTUCKY TODAY THROUGH WEDNESDAY DUE TO A LARGE AREA OF LOW PRESSURE ALOFT THAT IS CURRENTLY SPINNING IN PLACE OVER THE EASTERN GREAT LAKES REGION. ISOLATED/SCATTERED UPSLOPE-INDUCED SNOW SHOWERS WILL END FROM WEST TO EAST WEDNESDAY EVENING IN WAKE OF A DEPARTING TROUGH AXIS AS SURFACE RIDGING BUILDS EASTWARD AND INTO THE REGION. BUT SHOULD SEE ANY DEVELOPMENT REMAIN NEAR AND WEST OF THE INTERSTATE 71 CORRIDOR IF THIS SHALLOW LIFT IS EVEN ENOUGH TO GENERATE ANY SEMBLANCE OF SNOW ALONG A COLD FRONT.
This feature is forecast to continuing driving south/southeast this morning within the cyclonic flow about the large upper vortex centered in the lower Great Lakes region. In fact we may see flurries continue until the low stratus eventual clears later today.
530 AM EST TUE FEB 9 2016 A SURFACE ANALYSIS THIS MORNING SHOWS A TROUGH EXTENDING SOUTHWESTWARD FROM ANOTHER DEVELOPING ATLANTIC GALE CENTER OFF THE CAROLINAS. THE TROUGH RECENTLY PASSED THE FLORIDA KEYS. COOLER NEARSHORE WATERS SEEM TO BE DE- COUPLING WINDS AT THE SURFACE FROM STRONGER WINDS ALOFT. AN ASSOCIATED COLD FRONT WILL CLEAR THE STRAITS OF FLORIDA BY EARLY AFTERNOON.
STRONG RIDGING ALOFT WILL BEGIN TO WEAKEN AND SHIFT EAST TODAY, AND THE SURFACE THERMAL TROUGH WILL SLIDE INLAND AS WELL. IN A NORMAL SUMMER TIME RIDGING PATTERN, THIS WOULD SIGNAL THE HOTTEST DAY OF THE STRETCH OVER INLAND AREAS. TEMPERATURES WILL FALL BACK CLOSER TO NORMAL ON WEDNESDAY AS THE RIDGE AXIS MOVES INTO THE GREAT BASIN, OUR FLOW BECOMES WHOLLY ONSHORE, AND CLOUDS BEGIN TO MOVE IN.
243 AM PST TUE FEB 9 2016 HIGH PRESSURE WILL CONTINUE TO BRING DRY WEATHER TO THE CENTRAL CALIFORNIA INTERIOR FOR THE NEXT SEVERAL DAYS WITH PATCHY NIGHT AND MORNING FOG IN THE SAN JOAQUIN VALLEY. RIDGE OF HIGH PRESSURE WILL SHOW A LITTLE SIGN OF WEAKENING ACROSS NRN CA AS WE WILL SEE SOME IMPACT ACROSS NRN SJV AS A MODERATE MARINE AIR INTRUSION IS FORECAST BY THE MODELS. NEW GUIDANCE IS COMING IN COOLER ACROSS THE NORTH VALLEY. GUIDANCE IS CONFIDENT THAT THE MEAN RIDGE PATTERN OVER THE NEXT SEVERAL DAYS WILL REMAIN IN PLACE ACROSS THE WEST.
UPPER RIDGE AXIS SHIFTS EASTWARD THROUGH TONIGHT. A LITTLE BETTER MIXING TODAY COUPLED WITH WARMING IN THE MID LEVELS SHOULD RESULT IN TEMPERATURES AROUND 5 TO 10 DEGREES WARMER THAN YESTERDAY. LEE TROFFING TONIGHT AND ENHANCED WESTERLY WINDS ALONG THE EASTERN SLOPES/I-25 CORRIDOR SHOULD KEEP MIN TEMPS ON THE MILDER SIDE TONIGHT WHICH WILL BE A GOOD SEGUE INTO EVEN WARMER TEMPERATURES FOR WEDNESDAY.
THE STACKED LOW ACROSS THE GREAT LAKES WILL REMAIN FAIRLY STATIONARY WHILE HIGH PRESSURE SLOWLY TRICKLES DOWN FROM CANADA.
More of the same is anticipated across the Northern Rockies today under persistent high pressure.
DRY CONDS ARE EXPECTED WITH SOME EARLY MORNING DRIZZLE ALONG THE BUFFALO RIDGE. FREEZING DRIZZLE IS ALSO POSSIBLE IN SOME OF THE LOW LYING AREAS IN SW/WC MN THRU SUNRISE.