Aikyam-Lab/Synoptic-Bench huggingface dataset:
559 PM EDT SUN SEP 20 2015 HIGH PRESSURE WILL BRING A RETURN OF NEAR NORMAL DAYTIME TEMPERATURES FOR THROUGH THE MIDDLE OF THE COMING WEEK.
1106 AM MDT SUN SEP 20 2015 HIGH PRESSURE WILL DOMINATE OVER THE NEXT 36 HOURS KEEPING CONDITIONS DRY AND MAINLY CLOUDLESS ACROSS EASTERN UTAH AND WESTERN COLORADO. SUBTROPICAL MOISTURE APPROACHES FROM THE SOUTH MONDAY NIGHT AS AN AREA OF LOW PRESSURE CENTERED OFF THE SOUTHERN CALIFORNIA COAST CONTINUES TO PUSH TOWARD LAND.
SO TEMPS TODAY SHOULD BE A FEW DEGREES WARMER. RIDGE ALOFT BUILDS OVER CO BUT AIR MASS IS PRETTY DRY AND WITH SKIES REMAINING CLEAR. WITH READINGS DROPPING INTO THE LOWER 30S. SAN LUIS VALLEY MAY COME CLOSE TO THE FREEZING MARK FOR AN HOUR OR SO EARLY MONDAY MORNING. LEE TROFFING AND WESTERLY WINDS SHOULD KEEP MIN TEMPS A LITTLE WARMER THAN RECENT NIGHTS. HIGH PRESSURE RIDGE REMAINS ACROSS THE AREA FOR THE START OF THE WORK WEEK. AND 70S TO LOWER 80S FOR THE HIGH VALLEYS.
331 PM PDT SUN SEP 20 2015 Dry weather continues with daytime high temperatures trending cooler going into early part of the week. High pressure will remain over the region, resulting in mostly clear skies for the early part of the week.
655 PM EDT SUN SEP 20 2015 WHILE HIGH PRESSURE WILL SHIFT EAST OF THE AREA OVERNIGHT INTO MONDAY. WIND DIRECTION EITHER LIGHT/VARIABLE OF LIGHT NE TONIGHT WILL TEND TO VEER TO E OR ESE WITH TIME ON MONDAY AS HIGH PRESSURE CENTER BECOMES POSITIONED OVER NEW ENGLAND. EVEN WITH THE HIGH CLOUDS.
151 PM EDT SUN SEP 20 2015 AN APPROACHING COLD FRONT WILL REACH THE NORTH PART OF THE FORECAST AREA LATE TONIGHT.
A fast moving, dry cold front will produce windy conditions late this afternoon into this evening.
LOW LEVEL MOISTURE WILL INCREASE SLIGHTLY AHEAD OF THE TROUGH. AN UPPER LEVEL TROUGH OVER THE EASTERN CONUS WILL SLOWLY DIG SOUTHWARD AND CUT OFF OVER THE CAROLINAS LATER THIS WEEK.
Globals are showing some precip development well west of the Ozarks over the high plains region with surface trofing, however, this activity should stay east of our region. Upper level ridging will begin to build into the area Wed/Thurs and continue building eastward with time. Temps should be around or perhaps even slightly above climate average with ridging in place for the longer term. Expect the higher clouds to move out between 00-06z, but progged vertical moisture profiles keep some lower level clouds in place through much of the taf period.
The strongest winds are expected across northwest Montana, especially in the higher terrain. The showers are expected to mainly affect the higher terrain, especially across northwest Montana. A cooler day will also be in store, with temperatures running 5-10 degrees cooler than Sunday.
101 PM EDT SUN SEP 20 2015 HIGH PRESSURE BUILDING IN FROM THE GREAT LAKES WILL USHER IN A COOLER AND MORE SEASONABLE AIR MASS TODAY WITH A NORTHERLY BREEZE. HIGH PRESSURE WILL THEN BECOME ANCHORED OVER NORTHERN NEW ENGLAND AND THE CANADIAN MARITIMES PROVIDING DRY CONDITIONS THROUGH MID WEEK. PREVIOUS AFD HAS A FEW MORE A SPRAWLING AREA OF HIGH PRESSURE WILL BUILD EASTWARD FROM THE GREAT LAKES INTO THE NORTHEAST. TEMPERATURES WILL BE MUCH COOLER THAN RECENT DAYS WITH ONLY 60S TO LOWER 70S EXPECTED FOR HIGHS THIS AFTERNOON. HIGH PRESSURE WILL BE CENTERED OVER OUR REGION TONIGHT. WITH A COOLER AND DRIER AIR MASS IN PLACE.
329 PM CDT SUN SEP 20 2015 MAIN HIGHLIGHTS OF THE FORECAST CONTINUE TO BE COOLER TEMPERATURES CURRENTLY. A SPRAWLING HIGH PRESSURE CENTER WAS BUILDING INTO NORTHERN PORTIONS OF THE MID-SOUTH WITH A REMNANT FRONTAL BOUNDARY NEAR THE RED RIVER VALLEY.
137 PM EDT SUN SEP 20 2015 HIGH PRESSURE BUILDS IN TODAY.
240 PM EDT SUN SEP 20 2015 SEASONABLY COOL TEMPERATURES AND RIDGE RAIN CHANCES CAN BE EXPECTED FOR THE START OF THE NEW WEEK. A DIGGING GREAT LAKE-TO-OHIO VALLEY UPPER TROUGH IS NOW FORECAST TO PULL MOISTURE OVER THE SOUTH MONDAY AFTERNOON. AHEAD OF DEEPENING TROUGH.
246 PM EDT SUN SEP 20 2015 STRONG HIGH PRESSURE REMAINS CENTERED OVER THE GREAT LAKES REGION THIS AFTERNOON. TEMPS HAVE WARMED THRU THE 60S ON THEIR WAY INTO THE LOWER 70S FOR AFTERNOON HIGHS. WITH STRONG SURFACE RIDGING AND SUBSIDENCE HOLDING OVER MICHIGAN. SURFACE REGIME WILL REMAIN DOMINATED BY RIDGE OF HIGHER PRESSURE EXTENDING BACK FROM ITS CANADIAN MARITIMES CENTER. STILL APPEARS ENERGY ROTATING OUT OF WHAT IS BECOMING SEMI-PERMANENT NORTHEAST PACIFIC TROUGH WILL SLICE ACROSS CANADA.
TEMPERATURES WILL REMAIN WARMER THAN AVERAGE. BUT THE MAIN THRUST OF THE COLD POOL ASSOCIATED WITH THE UPPER LEVEL TROUGH AND COLD FRONT WILL BE WELL NORTH AND EAST OF THE GULF SOUTH. TEMPERATURES WILL BE ABOUT 5 DEGREES COOLER ON AVERAGE AS THE WEAK COLD AIR ADVECTION TAKES HOLD.
213 PM EDT SUN SEP 20 2015 HIGH PRESSURE BUILDS IN TODAY.
258 PM EDT SUN SEP 20 2015 HIGH PRESSURE WILL BRING A RETURN OF NEAR NORMAL DAYTIME TEMPERATURES FOR THROUGH THE MIDDLE OF THE COMING WEEK.
128 PM EDT SUN SEP 20 2015 HIGH PRESSURE OVER THE MIDWEST WILL CONTINUE TO BUILD EAST TODAY. THE HIGH WILL MOVE TO NEW ENGLAND ON MONDAY BUT EXTEND WEST ACROSS THE LOWER GREAT LAKES MUCH OF THE WEEK.
321 PM EDT SUN SEP 20 2015 HIGH PRESSURE WILL BUILD INTO THE REGION WITH CHILLY TEMPERATURES FOR TONIGHT. THEN HIGH PRESSURE WILL INFLUENCE OUR WEATHER DURING THE ENTIRE WORK WEEK WITH DRY WEATHER AND PLEASANT AND WARM EARLY FALL TEMPERATURES. HIGH PRESSURE ACROSS THE REGION WILL SLOWLY DRIFT EAST TO NEW ENGLAND TONIGHT. BUT WITH LATE AFTERNOON DEW POINTS IN THE LOWER TO MID 40S HAVE HELD TEMPS JUST ABOVE THAT THRESHOLD. HOWEVER DRY AIR FROM HIGH PRESSURE OFF THE NEW ENGLAND COAST WILL KEEP OUR AREA DRY.
203 PM MDT SUN SEP 20 2015 TEMPERATURES IN THE WESTERN PORTION OF THE AREA HAVE RISEN TO NEAR THE HIGH TEMPERATURE FORECAST. NEW MODEL DATA IS PUSHING THE HIGHER BOUNDARY LAYER MOISTURE FURTHER EAST. AT THIS TIME THE LOWEST VISIBILITIES LOOK TO BE JUST EAST AND SOUTH OF THE AREA. SO TRENDED THE TEMPERATURES TOWARD THE COOLER GUIDANCE THERE AND A LITTLE WARMER. MODELS RECENTLY WITH THE DRY GROUND AND AIR MASS HAS BEEN UNDERDOING THE HIGH TEMPERATURES A LITTLE. SO WILL MAKE SOME ADJUSTMENTS TO THE ONGOING FORECAST BUT TRENDED TOWARD THE WARMER GUIDANCE.
245 PM MDT SUN SEP 20 2015 AN UPR RIDGE AND DRY AIR MASS WL BE OVR THE FORECAST AREA TONIGHT AND MONDAY. WL HAVE A LOW CLOSE TO FREEZING TONIGHT.
A SURFACE COLD FRONT PUSHED THROUGH THE TENNESSEE VALLEY AND INTO CENTRAL ALABAMA LAST NIGHT INTO THIS MORNING. HIGHS WILL LIKELY BE IN THE LOWER 80S TO UPPER 70S.
MOST OF THE WEEK WILL SEE TEMPERATURES 5 TO 10 DEGREES ABOVE LATE SEPTEMBER NORMALS WHEN THE LONG-PERSISTENT UPPER RIDGE BUILDS AGAIN OVER OKLAHOMA AND TEXAS.
ELONGATED UPPER TROUGH WILL CONTINUE TO LIFT NORTHEASTWARD. WEAK UPPER RIDGING WILL BUILD INTO THE AREA OVERNIGHT INTO THE DAY ON MONDAY. AN UPPER TROUGH WILL BEGIN CLOSING IN ON THE REGION.
235 PM EDT SUN SEP 20 2015 COOL HIGH PRESSURE WILL SETTLE OVER THE REGION FOR THE BEGINNING OF THE NEW WEEK KEEPING THE WEATHER DRY. QUIET WEATHER ON TAP AS HIGH PRESSURE BUILDS IN. EXPECT LOWS GENERALLY IN THE LOW TO MID 40S FOR MOST AREAS WITH EVEN SOME UPPER 30S IN THE COLDER SPOTS. RIDGING AT THE SURFACE WILL CONTINUE TO RESULT IN DRY WEATHER THROUGH THE PERIOD.
130 PM EDT SUN SEP 20 2015 LOW PRESSURE OFF THE SOUTHEAST COAST WILL GRADUALLY MOVE FURTHER AWAY FROM THE REGION THROUGH TONIGHT.
400 PM EDT SUN SEP 20 2015 A COLD FRONT DISSIPATED AS IT MOVED THROUGH OUR REGION LAST EVENING. WITH LOW LEVEL MOISTURE NEARBY A MID/UPPER LEVEL TROUGH DROPPING SOUTHEAST INTO THE REGION IS EXPECTED TO LEAD TO A RESURGENCE OF CLOUDS AND POSSIBLY SOME SHOWERS FOR PORTIONS OF THE CENTRAL APPALACHIANS TONIGHT INTO MONDAY. IN THE WEST SKIES SHOULD BE CLEAR TO PARTLY CLOUDY AND MORNING LOWS A BIT COOLER AND HIGHS ON MONDAY A BIT WARMER WHEN COMPARED TO THE EAST.
GENERALLY BROKEN LOW CLOUDS (VFR CATEGORY) HANGING AROUND THE GREAT VALLEY THIS AFTERNOON AND THIS LAYER WILL LIKELY BECOME MVFR TONIGHT WITH POSSIBLE FOG AT TRI AFTER MIDNIGHT AS A WEAK UPPER LEVEL TROUGH MOVES ACROSS THE REGION.
152 PM EDT SUN SEP 20 2015 HIGH PRESSURE BUILDS IN TODAY.
245 PM CDT SUN SEP 20 2015 WV imagery shows an upper-lvl trough entering the MS Valley, having pushed the ridge down into South Texas. As a result, we've taken afternoon convection chances to a bare minimum, w/no convection expected 1st period as subsidence behind the trough begins to take hold. Monday, the upper ridge begins building north and reasserting itself further into Texas.
652 PM EDT SUN SEP 20 2015 A LARGE AREA OF HIGH PRESSURE WILL CONTINUE TO BUILD ACROSS THE NORTH COUNTRY TONIGHT AND BE THE MAIN WEATHER FEATURE THOUGH MUCH OF THE UPCOMING WEEK. LARGE HIGH PRESSURE AREA WILL CONTINUE TO DOMINATE ACROSS THE NORTH COUNTRY DURING THE SHORT-TERM PERIOD.
153 PM EDT SUN SEP 20 2015 HIGH PRESSURE BUILDING IN FROM THE GREAT LAKES WILL USHER IN A COOLER AND MORE SEASONABLE AIR MASS TODAY WITH A NORTHERLY BREEZE. HIGH PRESSURE WILL THEN BECOME ANCHORED OVER NORTHERN NEW ENGLAND AND THE CANADIAN MARITIMES PROVIDING DRY CONDITIONS THROUGH MID WEEK. PREVIOUS AFD HAS A FEW MORE A SPRAWLING AREA OF HIGH PRESSURE WILL BUILD EASTWARD FROM THE GREAT LAKES INTO THE NORTHEAST. TEMPERATURES WILL BE MUCH COOLER THAN RECENT DAYS WITH ONLY 60S TO LOWER 70S EXPECTED FOR HIGHS THIS AFTERNOON. HIGH PRESSURE WILL BE CENTERED OVER OUR REGION TONIGHT. WITH A COOLER AND DRIER AIR MASS IN PLACE.
347 PM EDT SUN SEP 20 2015 HIGH PRESSURE WILL BRING A RETURN OF NEAR NORMAL DAYTIME TEMPERATURES FOR THROUGH THE MIDDLE OF THE COMING WEEK.
TROUGH EXTENDS FROM THE LOWS CENTER SOUTHWEST TO THE STRAIT OF FLORIDA BETWEEN CUBA AND KEY WEST. UPPER LEVEL TROUGH OR 500MB LIES NORTH OVER CENTRAL FLORIDA. ALL INDICATING THAT THE TROUGH OF LOW PRESSURE LINGERS OFF THE U. AND RIDGES DOWN OVER FLORIDA. NORTHEAST WIND PATTERN TO LAST TROUGH MID WEEK.
411 PM EDT SUN SEP 20 2015 HIGH PRESSURE WILL BECOME ANCHORED OVER NORTHERN NEW ENGLAND AND THE CANADIAN MARITIMES PROVIDING DRY CONDITIONS THROUGH MID WEEK. ALONG WITH WINDS TRENDING TO CALM AS HIGH PRESSURE BECOMES CENTERED OVER OUR AREA. HIGH PRESSURE SLOWLY BUILDS EAST AS UPPER ENERGY TO THE SOUTH LOOKS TO REMAIN SUPPRESSED SOUTH BY GRADUAL UPPER RIDGING BUILDING INTO OUR REGION.
1155 AM MDT SUN SEP 20 2015 TEMPERATURES IN THE WESTERN PORTION OF THE AREA HAVE RISEN TO NEAR THE HIGH TEMPERATURE FORECAST. NEW MODEL DATA IS PUSHING THE HIGHER BOUNDARY LAYER MOISTURE FURTHER EAST. AT THIS TIME THE LOWEST VISIBILITIES LOOK TO BE JUST EAST AND SOUTH OF THE AREA. SO TRENDED THE TEMPERATURES TOWARD THE COOLER GUIDANCE THERE AND A LITTLE WARMER. MODELS RECENTLY WITH THE DRY GROUND AND AIR MASS HAS BEEN UNDERDOING THE HIGH TEMPERATURES A LITTLE. SO WILL MAKE SOME ADJUSTMENTS TO THE ONGOING FORECAST BUT TRENDED TOWARD THE WARMER GUIDANCE. THE PERIOD BEGINS WITH UPPER LEVEL RIDGING BEING PUSHED OFF TO THE EAST BY THE UPPER TROUGH AS IT MOVES NORTHEAST TOWARDS THE HIGH PLAINS FROM SOUTHWESTERN CALIFORNIA.
HIGH PRESSURE WILL BE IN CONTROL OF THE WEATHER DURING THIS PERIOD. RIDGING ALOFT AND AT THE SFC WILL HOLD CONTROL OF THE WEATHER THROUGH THE PERIOD. A WEAK COLD FRONT WILL DRIFT INTO NRN LOWER LATE TUE NIGHT. LATEST OPERATIONAL AND ENSEMBLE RUNS OF THE ECMWF AND GFS SHOW RIDGING BOTH AT THE SURFACE AND ALOFT THROUGH THE ENTIRE PERIOD. IF THERE IS GOING TO BE ANY ISSUE WITH THE DRY AND MAINLY CLEAR FORECAST IT WILL COME FROM THE HANDLING OF THE LOW SOUTHWEST OF THE SOUTHERN CALIFORNIA COAST AND THE POTENTIAL TROPICAL SYSTEM OFF THE BAJA OF CALIFORNIA. THE SYSTEM IS ABSORBED BY THE RIDGE IN THE MODELS WITH DIFFERENT TIMING AND LOCATION. LIGHT AND VARIABLE WINDS ARE ANTICIPATED FOR THE MOST PART WITH HIGH PRESSURE CENTERED OVER THE GREAT LAKES REGION.
MORE ATTENTION IS WARRANTED FOR THE TUE NIGHT-THU NIGHT TIMEFRAME AS THE FRONT STALLS OUT JUST TO THE S OF THE AREA IN CONJUNCTION WITH AN APPROACHING LARGE AREA OF MOISTURE AND UPR LVL TROFFING FROM THE SRN CALIFORNIA/NRN MEXICAN COAST. THIS LARGE MASS OF MOISTURE AND UPR LVL VORT MAXIMAE WILL SHIFT NEWD AROUND THE PERIPHERY OF AN UPR LVL RIDGE OVER THE LWR-MID MISS RIVER VALLEY REGIONS.
A PACIFIC LOW PRESSURE SYSTEM SPINNING OFF THE SOUTHERN CALIFORNIA COAST WILL CIRCULATE SIGNIFICANT.
NORTHEAST WINDS 5 KNOTS TO BECOME SOUTHEAST ACROSS DEEP EAST TEXAS TERMINAL SITES AS HIGH PRESSURE SHIFTS EAST.
HENCE THE WARMER TEMPS. A COLD FRONT WILL DROP IN FROM THE NORTH TONIGHT WHILE A LOW PRESSURE WAVE PROPAGATES EASTWARD ALONG THE FRONT. MOST OF THE PRECIPITATION SHOULD END BY SUNDAY NIGHT AS THE FRONT EXITS TO THE SOUTH AND THE LOW PRESSURE WAVE DEPARTS OFF THE COAST.
THUS COULD BE RAIN/FREEZING RAIN MIXTURE. THE WEAK WAVE WILL BRING A REINFORCING COLD FRONT INTO THE REGION TONIGHT. WHICH SHOULD YIELD COOLER TEMPS IN THE 40S AND 50S SUNDAY.
Given the cooler temperatures aloft small hail will be possible with a few of the storms across the rest of the area this evening into tonight, but instability will be more limited and not expecting severe storms. Temperatures will be cooler than the past several days, but still mild with readings in the 60s.
A surface warm front extended from west-central TX northeast across central OK into northeast OK and northern AR early this morning. The surface warm front across northern OK will push northward across southeast KS through the day. There may be enough isentropic lift north of the warm front for showers and perhaps an elevated thunderstorm to develop along and south of I-35 late this afternoon into the early evening hours. An H5 trough digging southeast across the central high plains Saturday evening will cause the 850mb winds to veer and shift the deeper moisture eastward into MO. A mostly dry and cooler upper air pattern is expected in the extended.
FORECAST SOUNDINGS INDICATE AN INVERSION WITH A MAX TEMP AROUND 3-4C BETWEEN 09Z-12Z WHICH AT FIRST BLUSH WOULD FAVOR RAIN/FREEZING RAIN UNTIL THE PRECIPITATION COOLS THE COLUMN BELOW FREEZING. THE WET BULB TEMPERATURE IN THE INVERSION LAYER IS ONLY EXPECTED TO BE SLIGHTLY ABOVE 0C SO THERE IS SOME QUESTION AS TO WHETHER THE FREEZING RAIN/SLEET WILL REALLY MATERIALIZE OR WHETHER ANY PRECIPITATION WILL JUST FALL AS SNOW. BUT STILL HAVE THE HIGHEST TOTALS BELOW AN INCH. COULD SEE LIGHT FREEZING RAIN WITH WARM TEMPERATURES ALOFT.
THEN 1000-850MB WINDS TURN TO THE NORTH WITH THE LOW LEVELS BECOMING NORTHEAST. THIS WILL LEAD TO INCREASING CLOUDS IN THE LAKESHORE AREAS EARLY SUNDAY MORNING ON A WEAK BACKDOOR COLD FRONT. TEMPERATURES WILL BE COOLER ON SUNDAY.
HIGH PRESSURE WILL BUILD ACROSS THE REGION FOR THE REMAINDER OF THE WEEKEND.
1123 AM EST SAT FEB 20 2016 HIGH PRESSURE ALONG THE SOUTHEAST COAST WILL BE SUPPRESSED SOUTHWARD AS A COLD FRONT MOVES INTO THE AREA SUNDAY NIGHT.
As the Northern Rockies transitions from a cold frontal passage environment to a post-frontal environment, we will see bands of snow develop and add to snow accumulations at higher elevations throughout the day. Snow showers will prevail over the higher terrain today leading to frequent mountain obscurations. Snow showers will continue for much of the higher terrain this morning, with occasional showers making it into the lower valleys.
MAINLY TO THE SOUTH OF PITTSBURGH AS LOW PRESSURE CROSSES THE MID ATLANTIC STATES.
EXPECT HIGHS IN THE LOWER 70S IN MOST LOCATIONS. /ISSUED 350 AM CST SAT FEB 20 2016/ IT APPEARS WE ARE TRANSITIONING INTO A COOLER AND WETTER PATTERN.
HIGH PRESSURE AND STABLE WEATHER ARE EXPECTED TO CONTINUE THROUGH THE REMAINDER OF THE WEEKEND.
JUST LIKE THIS MORNING IT WILL DEPEND ON IF THE PRECIP WILL MAKE IT THROUGH THE DRY LAYER IN THE LOW/MID LEVELS. MAINTAINED VCSH WORDING IN THE TAFS THROUGH 20-22Z GIVEN THE LOW PROB ATTM. A SOUTHERLY FLOW AROUND ITS WESTERN PERIPHERY HAS BROUGHT WARMER AIR AND A GRADUAL INCREASE IN MOISTURE TO THIS REGION. A SERIES OF UPPER LEVEL DISTURBANCES/VORT MAXES WERE MOVING ACROSS THE LOWER 48. A COLD FRONT IS STILL ADVERTISED TO MAKE A MOVE SOUTHWARD ACROSS THE TENNESSEE VALLEY LATE SUNDAY. MEDIUM RANGE GUIDANCE WAS INDICATING ANOTHER CYCLONE DEVELOPING OVER THE HIGH PLAINS OF NM/TX EAST OF THE ROCKIES. AS HIGH PRESSURE FROM NORTHERN CANADA BUILDS TO THE SE.
MORNING RAOB SHOWED LOW LAYER COOLING IN WEST FLOW BEHIND THIS MORNING/S WEAK TROUGH PASSAGE. 500 MB HEIGHTS ROSE OVER 100 M ALONG THE PACNW COAST WITH THE NEXT UPPER RIDGE AXIS WHICH WILL BUILD SOME AS IT CROSSES SE OREGON SAT NIGHT AND SW IDAHO SUNDAY. TRAPPED COOLER AIR FROM ONTARIO TO WEISER AND ENHANCED WARMING ON MILD SW WINDS ACROSS THE ALVORD DESERT THROUGH BURNS JUNCTION TO A FEWS SPOTS ACROSS OWYHEE/TWF COUNTIES HIGHS SUNDAY REBOUND INTO THE LOWER TO MID 50S.
TEMPERATURES UNIFORM IN THE MID 70S WITH DEWPOINTS IN THE LOWER 60S.
WEAK UPPER RIDGING WILL MOVE INTO THE AREA ON SUN UNDER A DRIER AIRMASS. MORE VORTICITY AND A PACIFIC COLD FRONT WILL PUSH INTO THE REGION SUN NIGHT BRINGING A CHANCE OF SNOW SHOWERS TO AREAS OVER AND NEAR THE WESTERN MOUNTAINS. AND THE COLD FRONT CROSSES THE AREA. AS AN UPPER LEVEL RIDGE REMAINS STALLED OVER THE PACIFIC COAST. THIS SHOULD RESULT IN TEMPS A BIT COOLER THAN IN RECENT DAYS. EVEN IN THE HIGH TERRAIN.
1033 AM CST SAT FEB 20 2016 THE COLD FRONT THAT MOVED ACROSS MUCH OF OKLAHOMA YESTERDAY HAS RETREATED BACK TO NORTHWEST OKLAHOMA.
TODAY THROUGH SUNDAY NIGHT CURRENT SURFACE ANALYSIS SHOWS PACIFIC COLD FRONT FROM CENTRAL MT TO FAR WESTERN WY. WITH A CANADIAN COLD FRONT LYING ALONG THE CANADIAN AND MT/ND BORDERS. COLD FRONT TO THE WEST WILL MOVE QUICKLY THROUGH THE AREA LATER TODAY.
FLAT RIDGE ACROSS THE SOUTHERN PART OF THE COUNTRY. DEW POINT TEMPERATURES WERE ABOUT FIVE DEGREES HIGHER THAN 24 HOURS AGO AND WERE GENERALLY IN THE LOWER 60S ACROSS OUR CWA. THE LOW LEVEL FLOW WILL REMAIN FROM THE SOUTHEAST. SUNDAY AN UPPER LEVEL TROUGH WILL MOVE ACROSS NORTHERN MEXICO INTO WEST TEXAS AND A COLD FRONT WILL APPROACH OUR NORTHERN BORDER.
The upper level trough is currently sliding east and out of the region. Meanwhile high pressure is building in from the west.
UPPER LEVEL RIDGE STARTING TO BUILD INTO THE PACIFIC NORTHWEST THIS MORNING. RIDGE WILL BE CENTERED OVER THE FORECAST AREA TONIGHT WITH CLEAR TO PARTLY CLOUDY SKIES.
BREEZY WEST SURFACE WINDS WILL CONTINUE OVER THE HIGHER TERRAIN TODAY. PUSHING A COLD FRONT THROUGH THE REGION BY EARLY SUN MORNING. OVERNIGHT LOWS SHOULD BE COOLER THAN THE PAST COUPLE DOWNSLOPE WARMED NIGHTS. AS A STRONG COLD FRONT AND UPPER TROUGH MOVE THROUGH SERN CO. THIS SURGE OF COOLER AIR INITIALLY LOOKS TO BE DRY.
While these readings will be at least a few degrees cooler than yesterday, it should feel nicer outside due to winds being much lighter. 00Z models push a cold front southward toward Peoria at 00Z/6 pm today, to I-70 by 06Z/midnight tonight and through southeast IL during overnight. NNW winds brings cooler highs Sunday ranging from upper 40s ne CWA to lower 50s SW CWA with mid 50s along and south of highway 50 in southeast IL.
ESPECIALLY ACROSS NRN TERMINALS AHEAD OF AN APPROACHING COLD FRONT. THIS COLD FRONT WILL MOVE SOUTH THE THE STATE ON SUN. WITH A COLD FRONT APPROACHING FROM THE NW.
AREAS OF FOG MAY DEVELOP AS TEMPERATURES ACROSS SOUTHEAST KS HAVE RADIATED INTO THE LOW TO MID 40S OR ABOUT 10 DEGREES BELOW DEWPOINT TEMPERATURES ACROSS NORTHEAST OKLAHOMA. A COOLER POST- FRONTAL REGIME IS ANTICIPATED TONIGHT AND SUNDAY WITH A RETURN TO MORE SEASONABLE TEMPERATURES IN THE WAKE OF THE FRONT.
COLD FRONT THAT IS CURRENTLY HELD UP IN THE PANHANDLE WILL START TO MOVE SOUTH OVERNIGHT AND SLOWLY PUSH INTO THE HILL COUNTRY BY LATE SUNDAY AFTERNOON AND INTO THE I-35 CORRIDOR MAYBE BY 00-03Z. BUT SHOWERS AND ISOLATED THUNDER IS POSSIBLE SUNDAY AFTERNOON AND SUNDAY NIGHT AS AN UPPER LEVEL TROF INTERACTS WITH THE SLOW MOVING FRONT.
ESPECIALLY OVER THE HIGHER TERRAIN. A COLD FRONT WILL PROVIDE THE CHANCE FOR A FEW SPRINKLES OR MOUNTAIN SNOW SHOWERS SUNDAY. MOSTLY AFFECTING THE HIGHER TERRAIN TODAY. WELL DEFINED CLOSED LOW DEPICTED ON SATELLITE WILL CONTINUE TO TRACK EASTWARD FROM SOUTHER ONTARIO- QUEBEC BORDER THIS MORNING, REACHING THE ST LAWRENCE DELTA LATE TONIGHT/EARLY SUNDAY MORNING. THIS LOW WILL CONTINUE TO PRODUCE SHOWERS THIS MORNING WITH DRY SLOT ENCROACHING UPON THE REGION DURING THE LATE MORNING/EARLY AFTERNOON HOURS. BROAD UPPER TROUGH WILL EXIST OVER EASTERN CANADA AND THE NORTHEAST UNITED STATES BEGINNING SUNDAY.
EVEN WITHIN THIS BAND AT ONEILL THE SOUNDING IS ABOVE FREEZING UP THROUGH 850MB. LIGHT WEST TO NORTHWEST WINDS AND CLEARING SKIES BY SUNRISE WILL ALLOW TEMPERATURES TO FALL TO NEAR OR BELOW FREEZING AT MOST LOCATIONS.
235 PM EST SAT FEB 20 2016 A COLD FRONT WILL CROSS THE REGION TONIGHT AND WILL BE FOLLOWED BY A SECONDARY COLD FRONT ON SUNDAY.
A warm front surged northward through southern Missouri overnight helping to keep temperatures in the 50s in most locations. A cold front will have shifted through the entire Ozarks Region by mid day Sunday. Cooler air will spread across the area limiting temperatures to the 50s and 60s on Sunday afternoon.
A COLD FRONT EXTENDS ACROSS THE GREAT LAKES SOUTHWESTWARD INTO WESTERN TEXAS. HIGH PRESSURE IS STILL OUT OVER THE ATLANTIC WITH SOUTHERLY FLOW ACROSS EAST TENNESSEE. THE LOW AMPLITUDE TROUGH WILL MOVE IN FROM THE NORTHWEST ON SUNDAY WITH THE COLD FRONT PUSHING TO THE SOUTHEAST. AT THE BEGINNING OF THIS PERIOD A COLD FRONT WILL BE SAGGING INTO THE AREA.
THE DRYLINE WILL HAVE A DIFFICULT TIME RETREATING THIS EVENING FACING ZONAL FLOW ALOFT AND SURFACE RIDGING BEGINNING TO PUSH IN. THIS COOLER AIR MASS TO THE NORTH WILL RECEIVE A BOOST FROM SURFACE RIDGING DURING THE DAY ON SUNDAY LEADING TO A WELCOME COOL DOWN ALONG WITH SOME GUSTY NORTH WINDS. A WEAK SHORT WAVE TROUGH MOVING THROUGH THE UPPER FLOW WILL KEEP THE BULK OF LARGE SCALE ASCENT TO THE SOUTH OF THE REGION. MUCH LOWER THETA-E AIR IN THE LOWER LEVELS OF THE ATMOSPHERE WILL BE ADVECTING INTO THE REGION WITH THE SURFACE RIDGING.
NORTH TO NORTHEASTERLY WINDS WILL BECOME BREEZY BY LATE SUNDAY MORNING WITH THE PASSAGE OF A COLD FRONT. A DEWPOINT GRADIENT BECOMES OBVIOUS WITH UPPER 40S AND SE SFC WINDS NOTED ACROSS THE LOW ROLLING PLAINS AND MID TO UPPER 20S WITH SWRLY SFC WINDS NOTED ACROSS THE WRN SOUTH PLAINS. CONCERNS WILL ARISE ONCE AGAIN FOR THE LOW CLOUDS AND/OR FOG TO SPREAD NWWRD THROUGHOUT THE MORNING AND PERHAPS COME CLOSE TO OUR DOORSTEP /PER THE HRRR/ OR DRIFT IN ACROSS THE FAR SRN ZONES AOA DAYBREAK /PER THE NAM/. CERTAINLY MUCH COOLER AIR ASSOCIATED WITH THIS FRONT THAN WHAT HAS BEEN IN RESIDENCE ACROSS THE SRN PLAINS THE BETTER PART OF THE LAST WEEK. BUT TEMPS STILL SHOULD RUN ABOUT FIVE DEGREES WARMER THAN NORMAL.
1204 PM EST SAT FEB 20 2016 LOW PRESSURE WILL TRACK NORTHEAST THROUGH QUEBEC PROVINCE TODAY. THEN MOVE NORTH OF MAINE SUNDAY WHILE DRAWING A COLD FRONT ACROSS THE REGION.
MAINLY TO THE SOUTH OF PITTSBURGH AS LOW PRESSURE CROSSES THE MID ATLANTIC STATES. HIGH CLOUDS WILL INCREASE OVERNIGHT AS A WAVE OF LOW PRESSURE MOVES ACROSS THE NEARLY STATIONARY FRONT JUST SOUTH OF THE FORECAST AREA. OVERNIGHT LOWS SHOULD BE ABOUT 5 TO 10 DEGREES COOLER THAN LAST NIGHT. WHICH MAY ALLOW FOR AN UPSLOPE SNOW SHOWER OR TWO INTO THE RIDGES OVERNIGHT SUNDAY NIGHT.
ANOTHER WEAKER SHORT WAVE IN SOUTHERN SASKATCHEWAN DROPPING AROUND THE UPPER LOW IN NRN MANITOBA. ANY LIGHT PRECIP TO EXIT SUNDAY MORNING AND SUNDAY ITSELF TO BE CHILLY WITH COLD ADVECTION AT 925 MB AS HIGH PRESSURE DROPS SOUTH INTO SOUTHERN MANITOBA BY 18Z SUNDAY. SOME CLEARING WITH THE HIGH SHOULD DROP INTO NE ND AND NW MN SUNDAY AFTN/EVE.
LOWS TONIGHT WILL DIP BACK INTO THE LOWER TO MIDDLE 30S.
DEEP SOUTH TEXAS AND THE RIO GRANDE VALLEY WILL REMAIN ON THE NORTHERN PERIPHERY OF 500 MB HIGH PRESSURE.
245 PM CST SAT FEB 20 2016 Another very warm and thankfully, from a fire weather standpoint, moist airmass is in place across eastern Oklahoma and northwest Arkansas this afternoon in advance of a slowly approaching cold front stretching from near Kansas City southwestward through south central Kansas and into west central Oklahoma.
READINGS ACTUALLY REBOUNDED BACK INTO THE 40S IMMEDIATELY AHEAD OF A COLD FRONT THAT PUSHED THROUGH DURING THE LATE EVENING AND EARLY OVERNIGHT. BUT IF SUN CONTINUES LONGER INTO THE DAY THEY MAY BE A DEGREE OR TWO WARMER ACROSS FAR SOUTHERN MN. AN AREA OF RELATIVE LOW PRESSURE /1020+ MB/ WILL PUSH INTO SOUTHWESTERN MN LATE TONIGHT. WITH THE HIGHER END OF THAT RANGE FROM WEST/SOUTHWEST INTO SOUTH CENTRAL MN.