Aikyam-Lab/Synoptic-Bench huggingface dataset:
UPPER AIR ANALYSIS SHOWING PIECES OF VORT MAX ENERGY STREAMING ACROSS FOR THE NEXT 12 TO 18 HOURS BEFORE A WEAK SHORT WAVE RIDGE SHIFTS INTO THE AREA. BEFORE THE INTRODUCTION OF THE RIDGE PATTERN. SATELLITE FOG PRODUCT HAS THE HIGHEST POTENTIAL FOR FOG ALONG A LINE FROM WEST OF ATWATER THROUGH WEST OF MADERA AND ALONG KERMAN/CARUTHERS AND DOWN TO HANFORD. THE WEAK RIDGE PATTERN WILL LOWER THE POTENTIAL FOR PRECIP AND INCREASE THE POTENTIAL FOR FOG.
624 AM EST TUE NOV 10 2015 HIGH PRESSURE AND DRIER AIR WILL BUILD INTO THE REGION THIS AFTERNOON AS LOW PRESSURE TRACKS NORTHWARD ALONG THE MID ATLANTIC COAST.
WITH TEMPERATURES AT OR BELOW FREEZING BRIDGES AND OVERPASSES MAY BECOME SLICK IN THIS AREA SO USE CAUTION. AS UPPER LEVEL TROF SHIFTS EASTWARD ACROSS THE REGION. LEE TROFFING WILL DEVELOP AT THE SFC.
305 AM PST TUE NOV 10 2015 A LOW PRESSURE SYSTEM WILL MOVE INLAND TODAY WITH SHOWERS ENDING FROM THE NORTHWEST DURING THE MORNING AND WITH GUSTY WEST WINDS CONTINUING FOR THE MOUNTAINS AND DESERTS INTO THE AFTERNOON.
/ISSUED 431 AM CST TUE NOV 10 2015/ A POSITIVELY TILTED UPPER-LEVEL TROUGH DIGGING INTO THE INTER- MOUNTAIN WEST TODAY WILL BE THE FOCUS FOR SENSIBLE WEATHER ACROSS THE PANHANDLES TODAY AND TOMORROW. WINDS ON ON WEDNESDAY WILL REALLY PICK UP AS THE UPPER- LEVEL LOW PRESSURE DEEPENS AND SLIDES OVER SOUTHERN COLORADO AND KANSAS. WEST WINDS WILL INCREASE TO AROUND 25 TO 40 MPH BEHIND A PACIFIC COLD FRONT THAT RUSHES THROUGH THE PANHANDLES LATE TONIGHT. WITH THE HIGHEST WINDS LIKELY ACROSS THE OKLAHOMA PANHANDLE AND NORTHERN TEXAS PANHANDLE TOMORROW.
431 AM CST TUE NOV 10 2015 A POSITIVELY TILTED UPPER-LEVEL TROUGH DIGGING INTO THE INTER- MOUNTAIN WEST TODAY WILL BE THE FOCUS FOR SENSIBLE WEATHER ACROSS THE PANHANDLES TODAY AND TOMORROW. WINDS ON ON WEDNESDAY WILL REALLY PICK UP AS THE UPPER- LEVEL LOW PRESSURE DEEPENS AND SLIDES OVER SOUTHERN COLORADO AND KANSAS. WEST WINDS WILL INCREASE TO AROUND 25 TO 40 MPH BEHIND A PACIFIC COLD FRONT THAT RUSHES THROUGH THE PANHANDLES LATE TONIGHT. WITH THE HIGHEST WINDS LIKELY ACROSS THE OKLAHOMA PANHANDLE AND NORTHERN TEXAS PANHANDLE TOMORROW.
916 AM EST TUE NOV 10 2015 LOW PRESSURE AT THE SURFACE AND ALOFT WILL MOVE NORTHEAST AND AWAY FROM THE OHIO VALLEY TODAY. A DRY AIRMASS WILL BUILD IN BEHIND IT WITH HIGH PRESSURE CENTERING OVER EASTERN KENTUCKY TONIGHT.
638 AM EST TUE NOV 10 2015 LOW PRESSURE AT THE SURFACE AND ALOFT WILL MOVE NORTHEAST AND AWAY FROM THE OHIO VALLEY TODAY. A DRY AIRMASS WILL BUILD IN BEHIND IT WITH HIGH PRESSURE CENTERING OVER EASTERN KENTUCKY TONIGHT.
THIS PATTERN WILL RESULT IN A WARMER AND MORE HUMID DAY THAN THE PAST SEVERAL DAYS WITH AFTERNOON HIGHS IN THE 70S. LARGE SCALE LIFT WILL INCREASE FROM WEST TO EAST TONIGHT AS A LOW PRESSURE SYSTEM MOVES EAST ACROSS COLORADO AND NEW MEXICO. THE UPPER LOW WILL MOVE QUICKLY NORTHEAST ACROSS THE CENTRAL PLAINS ON WEDNESDAY AND ALLOW A COLD FRONT TO SWEEP ACROSS THE REGION. DRY AND WINDY CONDITIONS ARE EXPECTED WEDNESDAY AFTERNOON BEHIND THE COLD FRONT.
S/SE WINDS WILL REMAIN LIGHT TODAY FROM 5-10 KTS BUT INCREASE LATE IN THE TAF PERIOD AHEAD OF AN APPROACHING COLD FRONT WITH LOW CLOUDS AND FOG LIKELY RETURNING TO ALL TERMINAL LOCATIONS AROUND 11/09Z. USHERING IN WARMER TEMPERATURES TO ABOVE AVERAGE TODAY AND LOWS IN THE MORNING WITH JUST SOME PASSING HIGH CLOUDS. TOMORROW COULD SEE SOME MORE FOG WITH THE ADVECTION OF WARMER AIR AND THEN HIGHS TOMORROW LOOK TO BE A LITTLE WARMER IN MID TO UPPER 70S. THIS WILL BE MAINLY DURING THE MID TO LATE DAY WITH SEVERITY DIMINISHING INTO THE EVENING AS OUR WINDS SHIFT FROM W/SW TO W/NW AS THE COLD FRONT SPREADS OVER THE FOUR STATE AREA.
THIS SEEMS UNREASONABLE WITH WINDS ABOVE 10 KTS EVEN THOUGH MOISTURE AND WARM AIR ADVECTION WILL BE STRONG AHEAD OF A COLD FRONT FORECAST TO MOVE THROUGH JUST PAST THE END OF THE TAF CYCLE. SOUTHERLY FLOW IN THE LOW-LEVELS WILL PUSH TEMPERATURES TO AT OR SLIGHTLY ABOVE CLIMATOLOGICAL NORMALS. CLOUD COVER THICKENS OVERNIGHT DUE TO INCREASED SOUTHERLY FLOW IN THE LOW-LEVELS. AN UPPER LOW CURRENTLY OVER CENTRAL CALIFORNIA WILL TRANSLATE EAST INTO THE SOUTHERN ROCKIES BY EARLY WEDNESDAY MORNING. AS THIS TROUGH MOVES EAST INTO THE SOUTHERN PLAINS ON WEDNESDAY. A PACIFIC COLD FRONT WILL SWEEP THROUGH TEXAS.
LOW PRESSURE OVER WEST VIRGINIA AND SOUTHERN OHIO WILL MOVE AND A RIDGE OF HIGH PRESSURE ACROSS THE MIDDLE MISSISSIPPI VALLEY WILL MOVE EAST ACROSS OUR REGION TONIGHT AND EARLY WEDNESDAY.
SHOWERS AHEAD OF A COLD FRONT ARE PUSHING ASHORE THIS MORNING ACROSS WEST CENTRAL AND SOUTHWEST FLORIDA. AS THE FRONT PUSHES THROUGH THE AREA TODAY ON AN IMPULSE FROM A MID- LEVEL TROUGH HEADING INTO THE ATLANTIC. COOLER.
SOUTHERLY FLOW IN THE LOW-LEVELS WILL PUSH TEMPERATURES TO AT OR SLIGHTLY ABOVE CLIMATOLOGICAL NORMALS. CLOUD COVER THICKENS OVERNIGHT DUE TO INCREASED SOUTHERLY FLOW IN THE LOW-LEVELS. AN UPPER LOW CURRENTLY OVER CENTRAL CALIFORNIA WILL TRANSLATE EAST INTO THE SOUTHERN ROCKIES BY EARLY WEDNESDAY MORNING. AS THIS TROUGH MOVES EAST INTO THE SOUTHERN PLAINS ON WEDNESDAY. A PACIFIC COLD FRONT WILL SWEEP THROUGH TEXAS.
THE ISLANDS WERE ABLE TO RADIATE AND LOW TEMPERATURES WERE IN THE LOW TO MID 70S. THE STREAK WAS BROKEN AS THE LOW THIS MORNING IN KEY WEST REACHED 78 DEGREES AND THE RECORD WAS 80. HIGH PRESSURE ESTABLISHING OVER NORTHERN GULF OF MEXICO AND SOUTHEASTERN UNITED STATES.
936 AM EST TUE NOV 10 2015 HIGH PRESSURE AND DRIER AIR WILL BUILD INTO THE REGION THIS AFTERNOON AS LOW PRESSURE TRACKS NORTHWARD ALONG THE MID ATLANTIC COAST.
1027 AM EST TUE NOV 10 2015 A THICK BLANKET OF LOW CLOUDS TRAILING THE COLD FRONT STRETCHES WELL UPSTREAM AND THE FEELING IS THAT THE MODELS ARE TOO QUICK TO DISSIPATE THIS LAYER OF STRATUS. COOLER AIR BENEATH THE CLOUDS WILL CONTINUE TO SLOWLY FILTER SOUTH AND TEMPS WILL STRUGGLE TO CLIMB AS LONG AS THE STRATUS DECK REMAINS IN PLACE. MAX TEMPS AROUND 80 ACROSS OUR SOUTHERN ZONES WILL BEGIN TO FALL THIS AFTERNOON AS COOLER AIR FILTERS SOUTH BENEATH THE STRATUS LAYER. THE LOW CLOUDS MAY STICK WITH US THROUGH MOST OF THE DAY AND IFR CONDITIONS COULD POSSIBLY STICK AROUND LONGER THAN CURRENTLY FORECAST.
1003 AM EST TUE NOV 10 2015 HIGH PRESSURE WILL SHIFT WELL OFFSHORE TODAY. LOW PRESSURE IS THEN FORECAST TO FORM OFF THE CAROLINAS.
WITH FREEZING TEMPERATURES POSSIBLE IN SOME AREAS. SHOWER ACTIVITY HAS COMPLETELY CEASED ACROSS NW CALIFORNIA AS THE UPPER TROUGH THAT BROUGHT THEM CONTINUES TO SLIDE TOWARDS THE SOUTHEAST. RESULTING IN READINGS HIGHER THAN FORECAST AND ABOVE FREEZING. LOCATIONS THAT DO NOT SEE THESE CLOUDS MAY SEE FROSTY AND PERHAPS FREEZING CONDITIONS. WHILE CALIFORNIA WILL BE UNDERNEATH A TRANSIENT UPPER RIDGE BETWEEN SYSTEMS TODAY TEMPERATURES WILL REMAIN COOL.
WHILE AREAS ACROSS THE NORTHWEST FA WILL REMAIN QUITE A BIT COOLER.
The high clouds riding southwest flow aloft ahead of a strong upper level low moving southeast through California towards southern Nevada. Low level moisture is being pulled northward as southerly flow strengthens ahead of this low. Today, with south/southwest winds across the area, we are expecting highs of 5 to 10 degrees warmer across the area. Tonight, the strong upper level low will move east into the Rocky Mountains toward the western central plains.
TEMPERATURES TODAY SHOULD BE WARMER THAN YESTERDAY WITH 850MB TEMPS SLIGHTLY WARMER AS WELL AS THE ABSENCE OF CLOUD COVER THIS AFTERNOON. AS THE STRONG UPPER TROUGH MOVES EAST IN THE GREAT PLAINS. 0-6KM SHEAR IS AGAIN VERY STRONG AND TYPICAL OF A FALL CYCLONE AT AROUND 60-80 KNOTS DEPENDING ON WHICH MODEL YOU LOOK AT.
636 AM EST TUE NOV 10 2015 AN AREA OF LOW PRESSURE, EXTENDING FROM THE OHIO VALLEY TO THE ATLANTIC SEABOARD, WILL MOVE NORTH.
The low pressure system which brought widespread rain and snow to the region yesterday will continue to slowly migrate south and east of western Montana and central Idaho today. Most locations within these areas have switched over to all snow fall, although a few pockets of rain can be found in the lower valleys. Across northwest Montana, precipitation has largely come to an end, with drier air settling in behind the low pressure system. Snow will gradually decrease this afternoon with only light showers lingering, mainly in the higher terrain.
1000 AM CST TUE NOV 10 2015 COLD FRONT SLIPPING SOUTH SLOWLY THRU THE FCST AREA. WHILE AREAS ACROSS THE NORTHWEST FA WILL REMAIN QUITE A BIT COOLER.
A STRONG COLD FRONT WILL APPROACH WEDNESDAY NIGHT. AN INCOMING NEGATIVELY-TILTED SHORT WAVE TROUGH WITH AN IMPRESSIVE VORT MAXIMA PLACED SOLIDLY IN THE BASE OF IT IS FINALLY MAKING ITS WAY INTO THE AREA AT THIS HOUR. THE RAIN SHOULD CONTINUE TO EXPAND THROUGH THE MORNING AS THE AREA REMAINS LARGELY AHEAD OF THE SHORT WAVE TROUGH WITH INCREASING UPPER DIVERGENCE.
HIGH PRESSURE IS THEN EXPECTED FOR THE REST OF THE WEEK WITH A SLOW WARMING TREND. THE UPPER LOW RESPONSIBLE FOR THE LOCALLY HEAVY SNOWFALL ACROSS WEST CENTRAL NEVADA IS NOW NEAR MINDEN AND SLOWLY MOVING SOUTHEAST. THIS MAIN BAND IS DUE TO DEFORMATION ON THE NORTH SIDE OF THE LOW.
THE UPPER LEVEL LOW SPINNING OFF TO OUR EAST THAT IS RESPONSIBLE FOR THE SHOWERS WILL QUICKLY HEAD TO THE FOUR CORNERS REGION BY LATE IN THE AFTERNOON.
AN AREA OF LOW PRESSURE AT THE SURFACE WILL BEGIN TO DEEPEN ACROSS THE EASTERN PLAINS OF COLORADO ALLOWING THE PRESSURE GRADIENT AND LOW LEVEL WINDS TO BEGIN TO INCREASE LATE IN THE PERIOD AS A MORE VIGOROUS MID/UPPER TROUGH APPROACHES FROM THE WEST. THIS SHOULD RESULT IN ANOTHER DAY OF ABOVE NORMAL TEMPERATURES WITH HIGHS RANGING FROM THE LOW TO MID 60S ACROSS PORTIONS OF CENTRAL KS TO THE LOWER 70S NEAR THE OKLAHOMA STATE LINE.
USHERING IN WARMER TEMPERATURES TO ABOVE AVERAGE TODAY AND LOWS IN THE MORNING WITH JUST SOME PASSING HIGH CLOUDS. TOMORROW COULD SEE SOME MORE FOG WITH THE ADVECTION OF WARMER AIR AND THEN HIGHS TOMORROW LOOK TO BE A LITTLE WARMER IN MID TO UPPER 70S. THIS WILL BE MAINLY DURING THE MID TO LATE DAY WITH SEVERITY DIMINISHING INTO THE EVENING AS OUR WINDS SHIFT FROM W/SW TO W/NW AS THE COLD FRONT SPREADS OVER THE FOUR STATE AREA.
A RIDGE OF HIGH PRESSURE ACROSS THE MIDDLE MISSISSIPPI VALLEY WILL MOVE EAST ACROSS OUR REGION TONIGHT AND EARLY WEDNESDAY.
FOG HAS NOT BEEN MUCH OF AN ISSUE THIS MORNING WITH THE AMOUNT OF THICKER CLOUD COVER IN PLACE KEEPING TEMPERATURES FROM RADIATING MUCH, THOUGH THE HIGHER DEWPOINTS MAY MAKE FOR PATCHY FOG DEVELOPMENT THROUGH DAYBREAK. THAT BEING SAID, TEMPERATURES SHOULD BE ABLE TO CLIMB BACK INTO THE LOW- 80S. LOW-LEVEL JETS GETS CRANKING LATE TONIGHT AHEAD OF THE APPROACHING COLD FRONT. OVER THE RIO GRANDE PLAINS, THINKING THAT AS THE LOW-LEVEL FLOW VEERS SOUTHWEST THE DOWNSLOPING FLOW OFF THE SIERRA MADRE WILL ACT AS AN EFFECTIVE CAP. AHEAD OF AN COLD FRONT.
643 AM EST TUE NOV 10 2015 AN UPPER LEVEL LOW WILL BEGIN TO EXIT THE REGION THIS MORNING.
THE BACK EDGE OF THE LOW CLOUDS WAS CONTINUING TO VERY SLOWLY SHIFT EASTWARD TOWARD THE FORECAST AREA AND EXPECT THIS TREND TO CONTINUE OVERNIGHT. AS THE UPPER LOW OVER THE OHIO VALLEY MOVES EAST TODAY A RIDGE WILL BEGIN TO BUILD ACROSS THE TN VALLEY.
512 AM CST TUE NOV 10 2015 AN UPPER LEVEL TROUGH WILL CONTINUE TO ADVANCE ACROSS THE WESTERN U. BY WEDNESDAY, THE UPPER LOW WILL BEGIN TO PUSH A STRONG COLD FRONT ACROSS OUR REGION. THE FORCING FROM THE LARGE SYSTEM ALONG WITH INCREASING MOISTURE WILL BRING A SMALL CHANCE FOR TSRA DEVELOPING AHEAD OF THE FRONT, GENERALLY EAST OF I-44 FOR WEDNESDAY, WITH THE HIGHEST POPS ACROSS SOUTHEAST OKLAHOMA.
AN UPPER LEVEL LOW PRESSURE TROF WILL MOVE EAST OF THE REGION TODAY AND DRY AIR WILL MOVE IN FROM THE WEST.
815 AM EST TUE NOV 10 2015 LOW PRESSURE WILL SPREAD RAIN OVER THE UPPER OHIO VALLEY REGION TODAY.
Showers will taper off across NorCal this morning as the trough shifts to the east. Still some snow along the northern Sierra crest along a deformation band to the north of the low.
724 AM EST TUE NOV 10 2015 LOW PRESSURE WILL SPREAD RAIN OVER THE UPPER OHIO VALLEY REGION TODAY. DEEP AND STRONG LOW PRESSURE SYSTEM WILL MOVE INTO THE WESTERN GREAT LAKES LATE WEDNESDAY. GIVEN THE WESTWARD TRACK OF THE LOW.
A LOW PRESSURE SYSTEM WILL MOVE INTO ARIZONA FROM THE NORTHWEST BRINGING STRONGER SOUTHWESTERLY WINDS. THE LOW WILL MOVE EAST OF ARIZONA ON WEDNESDAY WITH DRY WEATHER.
602 AM EST TUE NOV 10 2015 HIGH PRESSURE WILL SHIFT WELL OFFSHORE TODAY. LOW PRESSURE IS THEN FORECAST TO FORM OFF THE CAROLINAS.
Otherwise, another quiet weather day is anticipated across central and southeast Illinois with a persistent ridge of high pressure and associated dry air in place. Daytime highs should top out a few degrees warmer than the past couple of days, both due to airmass modification & weak low- level warm advection developing. Until then, southerly winds will continue through overnight today and into tomorrow, increasing the temps and available moisture in the low levels. However, MOS is still putting tomorrows highs in the 60s with some fluctuation between models ranging from the low to upper 60s, partially due to convection and/or cloud cover in the models. Higher than 24 hrs ago, but still on the low side.
OVERALL FORECAST STILL VERY MUCH LOOKS ON TRACK AS THE LOW IS NORTH OF THE AREA. CHATTANOOGA AIRPORT, TN 64 41 69 55 / 0 0 0 70 KNOXVILLE MCGHEE TYSON AIRPORT, TN 61 39 66 53 / 10 0 0 70 OAK RIDGE, TN 62 39 64 52 / 10 0 0 70 TRI CITIES AIRPORT, TN 60 37 65 48 / 20 0 0 50.
607 PM MDT THU MAY 28 2015 UPPER LOW SPINNING OVER WESTERN WYOMING IS ADDING STRONG ASCENT OVER OUR WESTERN CWA. THE UPPER JET ROUNDING THE BASE OF THIS LOW IS ACCENTUATING THE LIFT AS THE EXIT REGION NOSES INTO WESTERN COLORADO. UP NORTH COLD ADVECTION AND ENERGY IN THE BACK SIDE OF THE LOW. TEMPERATURES SIMILAR TO YESTERDAY WITH SOME LIGHT SNOW POSSIBLE OVER THE HIGHER PEAKS. THE TROUGH CONTINUES TO WORK INTO THE CENTRAL PLAINS. SKIES WILL CLEAR AS A RIDGE AMPLIFIES OVER THE WESTERN GREAT BASIN. A FAST TRANSITION OCCURS THIS WEEKEND FROM STORMY AND COOL TO DRIER AND MUCH WARMER.
HIGH PRESSURE ACROSS THE APPALACHIANS WILL ALLOW FOR DRY WEATHER TONIGHT.
707 PM EDT THU MAY 28 2015 HIGH PRESSURE WILL REMAIN OVER THE AREA THROUGH FRIDAY.
SHOWERS AND THUNDERSTORMS CONTINUE TO MOVE SLOWLY NORTH FROM THE HIGHER TERRAIN AREAS.
AN UPPER LOW OVER THE NORTHERN ROCKIES WILL MOVE EAST INTO THE PLAINS STATES TOMORROW. HIGH PRESSURE WILL STRENGTHEN ACROSS THE REGION THIS WEEKEND. JET DYNAMICS A LITTLE STRONGER THAN EARLIER FORECAST ALONG WITH A THETA-E RIDGE ACROSS SOUTHERN UTAH THROUGH TONIGHT.
1030 PM EDT THU MAY 28 2015 HIGH PRESSURE WILL SETTLE ACROSS THE REGION TONIGHT.
624 PM CDT THU MAY 28 2015 00Z TAF CYCLE AN UPPER TROUGH WILL HELP TO TRIGGER CONVECTION ACROSS THE NORTHERN AND WESTERN PANHANDLES. AND THEN NORTH AND NORTHEAST 10 TO 20 KNOTS FOLLOWING THE PASSAGE OF A COLD FRONT AFTER 12Z TO 15Z FRIDAY. AND THEN NORTHERLY 10 TO 20 KNOTS AFTER A COLD FRONT MOVES THROUGH AFTER 10Z TO 14Z FRIDAY. MORE SHOWERS AND THUNDERSTORMS ARE EXPECTED TODAY AS AN UPPER LEVEL SHORT WAVE TROUGH TRAVERSES THE SOUTHERN ROCKIES AND SOUTHERN HIGH PLAINS THIS AFTERNOON AND TONIGHT. ANOTHER SHORT WAVE TROUGH DIPS SOUTHEAST FROM THE CENTRAL ROCKIES ON FRIDAY AND FRIDAY NIGHT AND THIS WAVE COMBINED WITH THE INSTABILITY AND MOISTURE SHOULD ALSO HELP TO PRODUCE A FAIR AMOUNT OF SHOWERS AND THUNDERSTORMS ACROSS THE REGION.
EXPECT STORMS TO EVOLVE WITH THE INCREASE IN THE LOW LEVEL JET.
70/DD /ISSUED 217 PM CDT THU MAY 28 2015/ THE 19Z IR/VISIBLE SATELLITE IMAGERY ALONG WITH UPPER AIR ANALYSIS INDICATED THAT A LINGERING SHORT WAVE TROUGH AT 500 MILLIBARS WAS THE CULPRIT TODAY INVOLVING THE INCREASING AREA OF SHOWERS/STORMS DEVELOPING OVER CENTRAL AND INTO NORTH ALABAMA.
BERMUDA HIGH PRESSURE CENTERED OVER THE WESTERN ATLANTIC WILL BE THE DOMINANT FEATURE AFFECTING OUR WEATHER INTO THE WEEKEND. ALONG THE SOUTHERN PIEDMONT TROF WHICH WAS COINCIDENT WITH A DIFFERENTIAL HEATING BOUNDARY DUE TO THE MORNINGS STRATUS COVERAGE. DEEP RIDGING BECOMES MORE ASSERTIVE. WITH AN UPPER LEVEL RIDGE EXTENDING NORTHWARD INTO THE CAROLINAS AND A TROUGH OVER THE MIDWEST.
1000 PM EDT THU MAY 28 2015 SUMMER-LIKE CONDITIONS WITH ABOVE NORMAL TEMPERATURES WILL COME TO AN END BY THE END OF THE MONTH AS A COLD FRONT MOVES ACROSS CENTRAL PENNSYLVANIA THIS WEEKEND. THE FRONT IS EXPECTED TO STALL NEAR THE MASON DIXON LINE WHICH SHOULD FAVOR A COOLER WEATHER PATTERN TO START THE MONTH OF JUNE. SFC WINDS MAY START TO VEER AROUND TO THE SE-S BY THE END OF THE NIGHT AND BE AROUND 10 MPH OVER THE HIGH TERRAIN OF THE LAURELS. LIGHT WINDS BENEATH UPPER LVL RIDGE SHOULD RESULT IN NORTHWARD-DRIFTING PULSE TYPE TSRA WITH LITTLE THREAT OF SVR WX. HIGHS WILL RANGE THROUGH THE LOWER TO MIDDLE 80S FROM NORTH TO SOUTH. HIGH PRESSURE AT THE SFC AND ALOFT WILL ALLOW FOR SUBSIDENCE ONCE DAYTIME HEATING DIMINISHES FRIDAY EVENING.
SO WILL SLOW THE MOVEMENT OF THIS CONVECTION UNTIL LATER TONIGHT ONCE COLD FRONT CLEARS REGION FRIDAY MORNING.
929 PM EDT THU MAY 28 2015 HIGH PRESSURE OVER LAKE ONTARIO WILL SHIFT SOUTHEAST AND REINFORCE HIGH PRESSURE OFFSHORE THROUGH FRIDAY.
Convection was focused in advance of these features and training north across areas between the Highway 65 and 63 corridors particularly from the Marshfield and Marshfield areas north to the Camdenton and Eldon areas. Areas from between the Highway 65 and 63 corridors and north of Highway 60 will be monitored for training convection and resultant heavy rainfall and localized flooding. However additional convection may develop overnight and into Friday morning as the low level jet strengthens and weak perturbations track northeast through the mid level flow.
701 PM CDT THU MAY 28 2015 FOR 00Z TAFS /ISSUED 217 PM CDT THU MAY 28 2015/ THE 19Z IR/VISIBLE SATELLITE IMAGERY ALONG WITH UPPER AIR ANALYSIS INDICATED THAT A LINGERING SHORT WAVE TROUGH AT 500 MILLIBARS WAS THE CULPRIT TODAY INVOLVING THE INCREASING AREA OF SHOWERS/STORMS DEVELOPING OVER CENTRAL AND INTO NORTH ALABAMA.
1100 PM EDT THU MAY 28 2015 SUMMER-LIKE CONDITIONS WITH ABOVE NORMAL TEMPERATURES WILL COME TO AN END BY THE END OF THE MONTH AS A COLD FRONT MOVES ACROSS CENTRAL PENNSYLVANIA THIS WEEKEND. THE FRONT IS EXPECTED TO STALL NEAR THE MASON DIXON LINE WHICH SHOULD FAVOR A COOLER WEATHER PATTERN TO START THE MONTH OF JUNE. SFC WINDS MAY START TO VEER AROUND TO THE SE-S BY THE END OF THE NIGHT AND BE AROUND 10 MPH OVER THE HIGH TERRAIN OF THE LAURELS. LIGHT WINDS BENEATH UPPER LVL RIDGE SHOULD RESULT IN NORTHWARD-DRIFTING PULSE TYPE TSRA WITH LITTLE THREAT OF SVR WX. HIGHS WILL RANGE THROUGH THE LOWER TO MIDDLE 80S FROM NORTH TO SOUTH. HIGH PRESSURE AT THE SFC AND ALOFT WILL ALLOW FOR SUBSIDENCE ONCE DAYTIME HEATING DIMINISHES FRIDAY EVENING.
THE LOWER FLIGHT CONDITIONS WILL GRADUALLY IMPROVE TO VFR BY MID TO LATE MORNING WITH MOST CONVECTION ENDING OR MOVING EAST OF THE AREA.
AN UPPER LOW OVER THE NORTHERN ROCKIES WILL MOVE EAST INTO THE PLAINS STATES TOMORROW. HIGH PRESSURE WILL STRENGTHEN ACROSS THE REGION THIS WEEKEND. THE PATTERN SHIFTS TOMORROW THROUGH THE WEEKEND AS A RIDGE BUILDS IN.
THE MAIN THREAT WILL LIKELY TRANSITION TO FLOODING THREAT ALONG THE COLD FRONT WITH TRAINING ECHOES IN SOUTHEAST ND.
702 PM EDT THU MAY 28 2015 SUMMER-LIKE CONDITIONS WITH ABOVE NORMAL TEMPERATURES WILL COME TO AN END BY THE END OF THE MONTH AS A COLD FRONT MOVES ACROSS CENTRAL PENNSYLVANIA THIS WEEKEND. THE FRONT IS EXPECTED TO STALL NEAR THE MASON DIXON LINE WHICH SHOULD FAVOR A COOLER WEATHER PATTERN TO START THE MONTH OF JUNE. LIGHT WINDS BENEATH UPPER LVL RIDGE SHOULD RESULT IN NORTHWARD-DRIFTING PULSE TYPE TSRA WITH LITTLE THREAT OF SVR WX. HIGHS WILL RANGE THROUGH THE LOWER TO MIDDLE 80S FROM NORTH TO SOUTH. HIGH PRESSURE AT THE SFC AND ALOFT WILL ALLOW FOR SUBSIDENCE ONCE DAYTIME HEATING DIMINISHES FRIDAY EVENING.
948 PM EDT THU MAY 28 2015 HIGH PRESSURE WILL REMAIN OVER THE AREA THROUGH FRIDAY.
A MID/UPPER RIDGE OVER THE AREA WILL PROVIDE DRY AND STABLE CONDITIONS TONIGHT. SURFCE RIDGE NORTH OF THE AREA WILL CONTINUE TO BRING IN AN ONSHORE FLOW WHICH WILL BRING IN A FEW COASTAL CLOUDS LATER TONIGHT INTO FRI AM.
801 PM EDT THU MAY 28 2015 HIGH PRESSURE BUILDING OVER THE REGION TONIGHT WILL MEAN COOLER, AND LESS HUMID AIR THROUGH FRIDAY. WARMER AND MORE HUMID AIR RETURNS QUICKLY FOR THE WEEKEND WITH SHOWERS AND THUNDERSTORMS REDEVELOPING AHEAD OF A COLD FRONT MOVING SOUTH FROM CANADA. CANADIAN HIGH PRESSURE BUILDS IN TONIGHT WITH DEWPOINTS DROPPING INTO THE LOWER 50S. HIGH PRESSURE IS QUICK TO EXIT THE REGION ON FRIDAY WITH MILDER S-SW FLOW RETURNING ALOFT.
CHATTANOOGA AIRPORT, TN 66 85 66 84 / 60 50 20 30 KNOXVILLE MCGHEE TYSON AIRPORT, TN 66 84 65 85 / 20 40 20 20 OAK RIDGE, TN 67 84 65 85 / 20 40 20 20 TRI CITIES AIRPORT, TN 62 85 63 85 / 40 40 20 20.
BUILDING HIGH PRESSURE IS KEEPING SKIES MAINLY CLEAR ACROSS OUR CWA THIS EVENING. WITH TEMPERATURES ACROSS THE LOWER DESERTS NOW IN THE UPPER 80 TO MID-90 RANGE AT THIS HOUR. ABOUT 3-5 DEGREES WARMER THAN WHAT WAS RECORDED AT THIS TIME YESTERDAY. EVEN STRONGER RIDGING. AND A WARMER AIRMASS IS EXPECTED TO PUSH NORTHWARD ACROSS THE REGION. WITH EVEN WARMER TEMPS OVER THE UPCOMING WEEKEND.
820 PM EDT THU MAY 28 2015 A WEAK COLD FRONT WILL PUSH OFFSHORE AND DISSIPATE TONIGHT.
933 PM EDT THU MAY 28 2015 COLD FRONT HAS MOVED OFF THE COAST THIS EVENING. HIGH PRESSURE RETURNS FRIDAY AND MOVES OFF THE COAST OVER THE WEEKEND ALLOWING A WARM AND HUMID SOUTHWEST FLOW TO RETURN.
1014 PM EDT THU MAY 28 2015 HIGH PRESSURE OVER THE AREA WILL MOVE EAST TONIGHT.
1043 PM MDT THU MAY 28 2015 03Z SURFACE ANALYSIS HAD LOW OVER SOUTHEAST ND WITH TROUGH INTO NORTHEAST CO. COLD FRONT DROPPING INTO CENTRAL MT/ND. AND STARTING TO PICK UP SOME SPEED AS IT MOVES SOUTH IN RESPONSE TO HIGH PRESSURE BUILD SOUTH OUT OF SOUTH CENTRAL CANADA. DIURNALLY DRIVEN CONVECTION ALONG TROUGH WANING WITH LOSS OF SOLAR INSOLATION. SPINNING AROUND UPPER LOW IN CENTRAL WY. THIS EVENING THROUGH FRIDAY NIGHT CURRENT SURFACE MAP SHOWS TROF OF LOW PRESSURE ACROSS THE CENTRAL DAKOTAS. WATER VAPOR IMAGERY PLACES CLOSED UPPER LOW OVER SOUTHWEST WYOMING. UPPER LOW TRACKS SLOWLY ALONG WY/CO BORDER OVERNIGHT.
949 PM EDT THU MAY 28 2015 HIGH PRESSURE REMAINS ANCHORED WELL OFF THE MID ATLANTIC COAST OVERNIGHT. WITH A TROUGH OF LOW PRESSURE NEARLY STATIONARY EAST OF THE MOUNTAINS. HIGH PRESSURE WILL BUILD OVER THE NORTHEAST STATES FRIDAY.
831 PM EDT THU MAY 28 2015 HIGH PRESSURE REMAINS ANCHORED WELL OFF THE MID ATLANTIC COAST OVERNIGHT. WITH A TROUGH OF LOW PRESSURE NEARLY STATIONARY EAST OF THE MOUNTAINS. HIGH PRESSURE WILL BUILD OVER THE NORTHEAST STATES FRIDAY.
804 PM EDT THU MAY 28 2015 HIGH PRESSURE OVER THE AREA WILL MOVE EAST TONIGHT.
THE LOW-LEVEL JET WILL VEER TO THE SOUTHWEST OVERNIGHT AHEAD OF AN UPPER TROUGH MOVING EAST INTO THE NORTHERN AND CENTRAL PLAINS. /ISSUED 624 PM CDT THU MAY 28 2015/ 00Z TAF CYCLE AN UPPER TROUGH WILL HELP TO TRIGGER CONVECTION ACROSS THE NORTHERN AND WESTERN PANHANDLES. AND THEN NORTH AND NORTHEAST 10 TO 20 KNOTS FOLLOWING THE PASSAGE OF A COLD FRONT AFTER 12Z TO 15Z FRIDAY.
934 PM EDT THU MAY 28 2015 A RIDGE OF HIGH PRESSURE WILL BUILD INTO THE REGION TONIGHT AND WILL REMAIN OVER THE NORTH COUNTRY THROUGH FRIDAY NIGHT.
858 PM MDT THU MAY 28 2015 03Z SURFACE ANALYSIS HAD LOW OVER SOUTHEAST ND WITH TROUGH INTO NORTHEAST CO. COLD FRONT DROPPING INTO CENTRAL MT/ND. AND STARTING TO PICK UP SOME SPEED AS IT MOVES SOUTH IN RESPONSE TO HIGH PRESSURE BUILD SOUTH OUT OF SOUTH CENTRAL CANADA. DIURNALLY DRIVEN CONVECTION ALONG TROUGH WANING WITH LOSS OF SOLAR INSOLATION. SPINNING AROUND UPPER LOW IN CENTRAL WY. THIS EVENING THROUGH FRIDAY NIGHT CURRENT SURFACE MAP SHOWS TROF OF LOW PRESSURE ACROSS THE CENTRAL DAKOTAS. WATER VAPOR IMAGERY PLACES CLOSED UPPER LOW OVER SOUTHWEST WYOMING. UPPER LOW TRACKS SLOWLY ALONG WY/CO BORDER OVERNIGHT.
WEAK MID AND UPPER LEVEL RIDGING WITH SIGNIFICANTLY DRIER AIR WILL CONTINUE IN PLACE OVERNIGHT. HIGH PRESSURE WILL CONTINUE ACROSS THE WATERS.
UPPER LOW SPINNING OVER WESTERN WYOMING IS ADDING STRONG ASCENT OVER OUR WESTERN CWA. THE UPPER JET ROUNDING THE BASE OF THIS LOW IS ACCENTUATING THE LIFT AS THE EXIT REGION NOSES INTO WESTERN COLORADO. UP NORTH COLD ADVECTION AND ENERGY IN THE BACK SIDE OF THE LOW. TEMPERATURES SIMILAR TO YESTERDAY WITH SOME LIGHT SNOW POSSIBLE OVER THE HIGHER PEAKS. THE TROUGH CONTINUES TO WORK INTO THE CENTRAL PLAINS. SKIES WILL CLEAR AS A RIDGE AMPLIFIES OVER THE WESTERN GREAT BASIN. A FAST TRANSITION OCCURS THIS WEEKEND FROM STORMY AND COOL TO DRIER AND MUCH WARMER.