Aikyam-Lab/Synoptic-Bench huggingface dataset:
1018 AM MST TUE FEB 16 2016 18Z TAF CYCLE UPPER RIDGE BUILDING OVER NEW MEXICO WITH NW WINDS ALOFT. A STRONG RIDGE OF HIGH PRESSURE WILL MOVE EAST OVER NEW MEXICO THROUGH MID WEEK.
233 PM CST TUE FEB 16 2016 The persistent and quite amplified positive PNA pattern of the past 7 to 10 days (western CONUS ridge/eastern CONUS trough) will break down temporarily over the coming week. South winds return on Wednesday as the ridge slides east.
225 PM EST TUE FEB 16 2016 LOW PRESSURE MOVES OUT OF THE AREA TUESDAY. ANOTHER LOW PRESSURE SYSTEM SKIRTS SOUTHERN PORTIONS OF THE AREA TONIGHT. LOW PRESSURE CONTINUES TO MOVE TO THE NORTH AND EAST TUESDAY AFTERNOON.
249 PM CST TUE FEB 16 2016 ISSUED AT 250 PM| CST TUE FEB 16 2016 UPPER RIDGE TO THE WEST AND TROUGH OVER THE EASTERN CONUS WITH NORTHERN PLAINS IN NORTHWEST FLOW. WEST COAST RIDGE IS SLOWLY PROGRESSING EAST. NORTHWEST FLOW TONIGHT WILL BEGIN TO FLATTEN AS THE RIDGE AXIS MOVES TOWARDS THE ROCKIES. UNTIL THE RIDGE MOVES FURTHER EAST. A WEAK DISTURBANCE IS DRIFTING ACROSS THE HIGH PLAINS THROUGH THE OVERNIGHT HOURS AND EXPECT TO SEE A FEW RETURNS ON RADAR. ALSO WARMER AIR ARRIVES OVERHEAD. WARMER MAV/EC GUIDANCE SUGGEST UPPER 50S TO MID 60S FOR ALL BUT FAR NORTHEASTERN ZONES. THUS FORECAST FOLLOWS THE WARMER SIDE OF GUIDANCE.
MODELS SHOW THE FREEZING LEVEL NEAR THE 2500-3000 FEET AGL. SO THE HIGHER ELEVATIONS HAVE A GOOD CHANCE OF SEEING A PERIOD OF MODERATE TO HEAVY SNOW THIS EVENING THROUGH MIDNIGHT. CHATTANOOGA AIRPORT, TN 51 36 50 32 / 90 60 10 0 KNOXVILLE MCGHEE TYSON AIRPORT, TN 43 33 45 30 / 80 80 10 10 OAK RIDGE, TN 42 33 46 30 / 80 80 10 10 TRI CITIES AIRPORT, TN 41 30 43 27 / 60 80 10 10 TN.
312 PM EST TUE FEB 16 2016 A WEAK COLD FRONT WILL MOVE ACROSS THE FORECAST AREA LATE TONIGHT.
A cold front will continue to move south in the Trans-Pecos this afternoon, resulting in gusty winds northeast across west TX and southeast NM. Northerly winds will be gusty behind a cold front this morning before winds veer to the east and southeast this afternoon. /issued 342 AM CST TUE FEB 16 2016/ An upper level ridge along the west coast will move east toward the forecast area today and Wednesday.
1129 AM CST TUE FEB 16 2016 TIMING OF THE NEXT COLD FRONT PROCEEDING ALONG AS PREVIOUSLY FCST. SFC ANALYSIS AT 16Z SHOWS COLD FRONT BOUNDARY OVER N TX.
THE HIGHEST SNOWFALL TOTALS WILL BE WEST OF A WOODSTOCK TO MORRIS LINE WITH MAX VALUES OF A FEW TENTHS WITH SLIGHTLY HIGHER LOCAL AMOUNTS POSSIBLE.
445 PM EST TUE FEB 16 2016 UPPER AIR PATTERN CONSISTS OF A 500 MB RIDGE IN THE WESTERN U. WITH A TROUGH IN THE UPPER GREAT LAKES THIS MORNING. THIS TROUGH MOVES EAST INTO THE LOWER GREAT LAKES WED MORNING WITH THE RIDGE MOVING INTO THE ROCKIES 00Z THU.
A secondary cold front should push into the area late tonight, but no rain is expected to accompany the front with very dry air through the depth of the troposphere.
305 PM CST TUE FEB 16 2016 A COLD FRONT WILL CONTINUE TO MOVE THROUGH CENTRAL TEXAS LATE THIS AFTERNOON AND REACH THE TEXAS COAST OVERNIGHT. MORNING LOWS WEDNESDAY WILL BE COOLER THAN THE LAST SEVERAL DAYS AND RANGE FROM THE UPPER 30S TO THE MIDDLE 40S.
A SECOND SURGE OF HIGH PRESSURE BUILDS IN LATE TONIGHT. HIGH PRESSURE PUSHES THROUGH OVERNIGHT WITH PATCHY-AREAS BR-FG DEVELOPING AHEAD OF THE BOUNDARY.
335 PM EST TUE FEB 16 2016 STRONG LOW PRESSURE IS CURRENTLY MOVING THROUGH THE REGION WITH THE TREND BEING FOR RAIN TO CHANGE BACK TO SNOW THROUGH THE LATE AFTERNOON INTO EARLY EVENING BEFORE PRECIPITATION ENDS. STRONG LOW PRESSURE CURRENTLY MOVING THROUGH THE HEART OF THE CWA. THIS TREND WILL CONTINUE AS THE LOW MOVES NORTHEAST THROUGH NORTHERN NEW ENGLAND INTO QUEBEC OVER THE NEXT SEVERAL HOURS. AREAS JUST S/E OF THESE COUNTIES INCLUDING ELMIRA, BINGHAMTON WILL SEE A BIT LESS BUT MAY STILL SEE SLICK ROADS AND TREACHEROUS TRAVEL AS THE CHANGE OVER OCCURS AND TEMPS FALL BELOW FREEZING. WE'LL SEE ANOTHER PERIOD OF COLD BUT RELATIVELY SEASONAL TEMPERATURES ON WEDNESDAY WITH THE POTENTIAL FOR LIGHT SNOW SHOWERS AS WELL DUE TO A COLD FRONT AND ASSOCIATED UPPER LEVEL DISTURBANCE MOVING THROUGH.
BUT OVERALL A DRIER AND WARMER TREND IS EXPECTED MOVING TOWARDS THE WEEKEND. SOUNDINGS SHOW DRIZZLE/FREEZING DRIZZLE IS POSSIBLE. TAX LIGHT SNOW SHOWERS WILL QUICKLY DIMINISH WEDNESDAY NIGHT AS A BROAD AREA OF HIGH PRESSURE MOVES IN FROM THE WEST. RIDGING ALOFT WILL ENSURE A DRY PERIOD WITH CLEARING SKIES. DESPITE THE ADDITION OF SUN AND HIGH PRESSURE. TEMPERATURES WILL REMAIN SOMEWHAT LIMITED UNTIL THE AXIS OF THE UPPER RIDGES PASSES EAST AND WARM AIR ADVECTION KICKS IN.
A SHORT WAVE IS DIVNIG INTO THE LONG WAVE TROUGH OVER THE EASTERN HALF OF THE COUNTRY. A SECONDARY COLD FRONT WILL ACCOMPANY SHORT WAVE ACROSS FLORIDA PROVIDING ANOTHER SHOT OF COOL AIR AND INCREASING THE PRESSURE GRADIENT AND THE WINDS SLIGHTLY BY EARLY WEDNESDAY.
130 PM PST TUE FEB 16 2016 HOT AND DRY WEATHER WILL CONTINUE TODAY DUE TO HIGH PRESSURE AND WEAK OFFSHORE FLOW. A TROUGH OF LOW PRESSURE WILL BRING COOLER WEATHER FOR MID TO LATE WEEK.
WINDS WILL TURN LIGHT NORTHWESTERLY TO NORTHERLY LATE TONIGHT INTO EARLY WEDNESDAY MORNING FOLLOWING THE PASSAGE OF A WEAK COLD FRONT. AT THE SURFACE A WEAK AREA OF LOW PRESSURE IS REFLECTED WITH THE MID LEVEL DISTURBANCE TRACKING EASTWARD ACROSS NORTHERN SECTIONS OF AL AND GA LATER TODAY AND TONIGHT. AS FOR TEMPS WILL LEAN TOWARDS THE WARMER MAV GUIDANCE FOR HIGHS TODAY DUE TO BETTER SUNSHINE FOR MOST AREAS BY THIS AFTERNOON AND THE LOWER MAV NUMBERS FOR LOWS TONIGHT DUE TO MOSTLY CLEAR SKIES AND LIGHTER SURFACE WINDS BY EARLY WED MORNING.
1120 AM EST TUE FEB 16 2016 A COASTAL WARM FRONT WILL ADVANCE INLAND INTO EASTERN SECTIONS OF NORTH CAROLINA EARLY THIS MORNING AS A LOW PRESSURE SYSTEM TRACKS NORTHEAST INTO THE REGION. AN ASSOCIATED COLD FRONT WILL TRACK EASTWARD THROUGH THE CAROLINAS LATE THIS MORNING. ONE FINAL VORTICITY MAXIMUM WILL ROUND THE EASTERN UNITED STATES TROUGH THROUGH THE TENNESSEE VALLEY AND SOUTHERN APPALACHIANS THIS EVENING. HIGHS WEDNESDAY WILL BE COOLER.
WE BUMPED A CATEGORY ON A FEW SITES INTO THE LOW OR MID 70S. OUR SOUTHWEST WINDS ARE ALREADY SHIFTING TO WEST AND NORTHWEST ALONG AND AHEAD OF SFC COLD FRONT WHICH IS EASING ACROSS THE I-30 CORRIDOR NOW. WILL BE QUICKLY INCREASING BY MID TO LATE MORNING WITH THE APPROACH OF A COLD FRONT FROM THE NORTHWEST WITH SPEEDS INCREASING TO SOUTHWEST TO WEST 10-17 KNOTS WITH HIGHER GUSTS. AS A LARGE- SCALE UPPER TROF REMAINS ANCHORED OVER THE ERN HALF OF THE CONUS. AND AN UPPER RIDGE HOLDS OVER THE WRN CONUS.
A cold front has dropped south to near the I-20 corridor near KABI as of 17Z, and this front will continue south across the area this afternoon. Wind gusts near 20 knots will develop following a cold frontal passage. A cold front will cross the region from north to south today.
AND A WARM FRONT EXTENDING INTO PORTIONS OF THE MID SOUTH LATE THIS MORNING. WINDS WERE SOUTHERLY WITH TEMPERATURES RANGING FROM THE LOW 30S TO MID 40S. WEAK WAA OUT AHEAD AN ASSOCIATED SURFACE COLD FRONT WILL KEEP TEMPERATURES ABOVE FREEZING AS LIGHT RAIN BEGINS TO SPREAD OVER THE NORTHERN COUNTIES THIS MORNING. MODEL QPF SHOWS NEAR A QUARTER AN INCH OF RAINFALL IN THE LOWER TENNESSEE RIVER COUNTIES THROUGH MID AFTERNOON.
338 PM EST TUE FEB 16 2016 HIGH PRESSURE WILL DOMINATE THE WEATHER PATTERN THROUGH THE UPCOMING WEEKEND. AN AREA OF LOW PRESSURE WILL DRIFT EAST ACROSS THE NC/SC BORDER AND BE SITUATED NEAR THE COAST AROUND DAYBREAK. RANGING FROM THE LOW 40S INLAND TO MID/UPPER 40S CLOSER TO THE COAST. A DEEP LONG WAVE TROUGH WILL PREVAIL EAST OF THE APPALACHIANS AND WILL AID IN ALLOWING A WEAK BACKDOOR COLD FRONT TO DROP THROUGH LATE IN THE DAY INTO WEDNESDAY EVENING.
LOW PRESSURE CENTERED NEAR KMCI WILL QUICKLY PUSH A COLD FRONT THROUGH MIDDLE TENNESSEE LATER TODAY, WITH SHOWERS DEVELOPING FROM WEST TO EAST.
1117 AM CST TUE FEB 16 2016 /18Z TAFS/ VFR CONDITIONS EXPECTED TO PREVAIL THROUGH THE PERIOD WITH NORTHERLY WINDS BEHIND A COLD FRONT AROUND 10 TO 15 KT. THE 09Z SURFACE ANALYSIS SHOWED ANOTHER WEAK COLD FRONT EXTENDING FROM NORTHEASTERN KANSAS SOUTHWEST THROUGH THE TEXAS PANHANDLE. THE NORTHWESTERLY FLOW ALOFT ACROSS TEXAS WILL COME TO AN END DURING THE NEXT COUPLE OF DAYS AS THE UPPER TROUGH ACROSS THE EASTERN UNITED STATES MOVES EASTWARD AND AN UPPER LEVEL RIDGE BUILDS EASTWARD ACROSS THE SOUTHERN PLAINS.
/ISSUED 410 AM CST TUE FEB 16 2016/ THE COLD FRONT HAS PUSHED THROUGH THE AREA HOWEVER IT BECAME SO MODIFIED THAT TEMPS ACTUALLY WARMED AFTER THE PASSAGE. TEMPS TODAY WILL BE SIMILAR TO SLIGHTLY COOLER THAN YESTERDAY WITH NORTHERLY WINDS AND SOME HIGH CLOUDS EARLY IN THE DAY.
354 PM EST TUE FEB 16 2016 STRONG LOW PRESSURE IS CURRENTLY MOVING THROUGH THE REGION WITH THE TREND BEING FOR RAIN TO CHANGE BACK TO SNOW THROUGH THE LATE AFTERNOON INTO EARLY EVENING BEFORE PRECIPITATION ENDS. STRONG LOW PRESSURE CURRENTLY MOVING THROUGH THE HEART OF THE CWA. THIS TREND WILL CONTINUE AS THE LOW MOVES NORTHEAST THROUGH NORTHERN NEW ENGLAND INTO QUEBEC OVER THE NEXT SEVERAL HOURS. AREAS JUST S/E OF THESE COUNTIES INCLUDING ELMIRA, BINGHAMTON WILL SEE A BIT LESS BUT MAY STILL SEE SLICK ROADS AND TREACHEROUS TRAVEL AS THE CHANGE OVER OCCURS AND TEMPS FALL BELOW FREEZING. WE'LL SEE ANOTHER PERIOD OF COLD BUT RELATIVELY SEASONAL TEMPERATURES ON WEDNESDAY WITH THE POTENTIAL FOR LIGHT SNOW SHOWERS AS WELL DUE TO A COLD FRONT AND ASSOCIATED UPPER LEVEL DISTURBANCE MOVING THROUGH.
Overnight temperatures will remain fairly mild as warm high pressure moves overhead and cloud cover stays in-place across much of the area.
A DEVELOPING AREA OF LOW PRESSURE CONTINUES TO DEVELOP OVER SOUTHERN MISSOURI AT THIS TIME. A WARM FRONT EXTENDS SOUTHEAST FROM THIS BOUNDARY ACROSS NE ARKANSAS INTO NW MS. SOME LIGHT TO MODERATE OVERRUNNING PRECIPITATION HAS ALREADY DEVELOPED EAST AND NORTH OF THIS WARM FRONT OVER SOUTHERN MIDDLE TN NORTHERN TOWARD THE NASHVILLE AREA. THE HIGHER AMOUNTS. THREAT FOR PCPN SHOULD DIMINISH ARND 17/00Z AT MSL AND 02Z AT HSV AS COLD FRONT SWEEPS SEWD.
A WEAK COLD FRONT WILL MOVE THROUGH THIS EVENING. FOLLOWED BY GRADUALLY DRIER AND COOLER CONDITIONS.
SFC ANALYSIS AS OF 17Z SHOWING A COLD FRONT EXTENDING FROM NEAR A LZK TO TRL LINE AND THIS FEATURE WILL BE MOVING INTO OUR TERMINAL LOCATIONS LATER TODAY. WE BUMPED A CATEGORY ON A FEW SITES INTO THE LOW OR MID 70S. OUR SOUTHWEST WINDS ARE ALREADY SHIFTING TO WEST AND NORTHWEST ALONG AND AHEAD OF SFC COLD FRONT WHICH IS EASING ACROSS THE I-30 CORRIDOR NOW.
432 PM EST TUE FEB 16 2016 LOW PRESSURE OVER UPSTATE NY WILL CONTINUE TO LIFT NORTH TO LABRADOR TONIGHT. LOW PRESSURE PASSES SOUTH OF THE AREA TONIGHT.
TONIGHT: TEMPERATURES A BIT TRICKY WITH GOOD RADIATIONAL COOLING THIS EVENING AS RIDGE MOVES QUICKLY EAST. WED: RELATIVELY LIGHT WINDS ANTICIPATED ON WED AS WEAK RIDGE MOVES THROUGH AND RETURN FLOW DEVELOPS WED NIGHT. BUT WOULD NOT BE SURPRISED IF IT GOES A FEW/SEVERAL DEGREES WARMER. ALTHOUGH GFDI VALUES WILL BE IN THE HIGH END OF HIGH CATEGORY.
230 PM MST TUE FEB 16 2016 GUSTY WINDS CONTINUE ACROSS THE CHEYENNE RIDGE AND AREAS ALONG AND WEST OF THE LARAMIE RANGE THIS AFTERNOON. WINDS WILL BE RELATIVELY SUBDUED WEDNESDAY AS AN UPPER LEVEL RIDGE SHIFTS ACROSS THE ROCKIES. WITH THE RIDGE IN PLACE DRY CONDITIONS WILL PREVAIL TONIGHT THROUGH WEDNESDAY NIGHT.
112 PM EST TUE FEB 16 2016 LOW PRESSURE AND AN ASSOCIATED COLD FRONT WILL LIFT AWAY FROM THE REGION TODAY. HIGH PRESSURE WILL DOMINATE THE WEATHER PATTERN FOR THE REMAINDER OF THE WEEK. QUIET WEATHER WITH A FEW HIGH CLOUDS AND LIGHT WINDS AHEAD OF A DRY COLD FRONT. HIGH PRESSURE WILL DOMINATE THE PATTERN WITH DRY CONDITIONS AND MOSTLY SUNNY SKIES OVER THE SOUTHEASTERN UNITED STATES.
Unseasonably cool high pressure for mid/late August will build into the Plains in the short term.
220 PM MDT SUN AUG 23 2015 High pressure building across the region will bring mostly clear skies into tonight, although an increasing westerly flow will allow thicker smoke back into areas that felt temporary reprieve over the weekend. As the ridge of high pressure strengthens through the first half of this week, warm and relatively dry conditions will dominate.
1216 PM CDT SUN AUG 23 2015 MOST OF THE FORECAST SHIFT WAS SPENT TRYING TO BUILD IN DETAILS ON THE TRENDS IN THE WEATHER FROM THE STRONG CYCLONE OVER THE NORTHERN PART OF THE REGION. THE COLD FRONT IS PUSHING TOWARD ERN WI WITH LIGHT SHRA AHEAD OF THE FRONT AND SOME POST-FRONTAL SHRA ABOUT A COUNTY FURTHER WEST. MULTIPLE FRONTOGENETIC BANDS INDICATED IN THE RAP IN THE LOWER LEVELS. CLOUDS AND LOW-LEVEL SECONDARY TROUGH/FRONTAL AXIS ALONG MN/DAKOTAS BORDER IS SHIFTING TOWARD THE AREA AS WELL. INCLUDING THE MN TROUGH AXIS AND CONVERGENCE ALONG IT. THE SYSTEM BECOMES A BROAD CYCLONIC FLOW SCENARIO WITH ONLY A WEAK REMNANT TROUGH AFFECTING NRN WI LATER THIS MORNING AND AFTERNOON.
224 PM EDT SUN AUG 23 2015 HIGH PRESSURE RIDGE OVER PENNSYLVANIA WILL SLOWLY WEAKEN AS A COLD FRONT APPROACHES AND THEN MOVES ACROSS THE REGION MONDAY. A RELATIVELY DEEP MID-TROPOSPHERIC TROUGH WILL DOMINATE THE PATTERN OVER PENNSYLVANIA FOR THE REMAINDER OF THE WEEK. MINS WILL RANGE FROM MID TO UPPER 50S NORTH TO THE LOWER 60S SOUTHEAST. MOISTURE POOLS LONGEST OVER MY SOUTHEAST AND THAT IS WHERE POPS REMAIN THE HIGHEST MONDAY AFTERNOON AND EVENING. HIGHS WILL RANGE FROM THE LOWER TO MIDDLE 70S NORTHWEST TO THE MIDDLE 80S SOUTHEAST. ALL MED RANGE GUIDANCE CONTINUES TO INDICATE OUR MID-LATE WEEK WX WILL BE DOMINATED BY LINGERING UPPER TROUGH OVR THE NORTHEAST CONUS.
321 PM CDT SUN AUG 23 2015 FAIRLY STABLE WITH UPSLOPE STRATUS BEHIND THIS MORNINGS COLD FRONT PASSAGE. MODELS ARE IN FAIRLY GOOD AGREEMENT WITH AN UPPER LEVEL RIDGE OF HIGH PRESSURE CENTERED OVER THE SOUTHERN ROCKIES THROUGH MID-WEEK.
535 PM EDT SUN AUG 23 2015 A SLIGHT CHANCE OF RAIN OVERNIGHT AS A WEAK COLD FRONT CROSSES THE REGION WILL BE FOLLOWED BY DRY CONDITIONS AND TEMPERATURES SLIGHTLY BELOW NORMAL THROUGH THE WEEK.
1244 PM CDT SUN AUG 23 2015 Strong storms continue to track southeast across southeastern Kansas and western Missouri early this morning ahead of an approaching cold front. A cooler air mass will build into the region behind the cold front today. The region will remain in a northwest flow pattern through the week as upper level trough will be located over the eastern U. and an upper level ridge over the western U. A cold front will continue to push southeast across southern Missouri this afternoon.
240 PM CDT SUN AUG 23 2015 Current observations show the cold front is right about where it was expected to be at this time, right along the I-20 corridor to Pecos, then extending northwest along the Pecos River valley into southeast New Mexico. The remainder of the forecast appears to be a return of what we are very familiar with, an upper level high building over New Mexico and west Texas.
322 PM EDT SUN AUG 23 2015 HIGH PRESSURE WILL BUILD INTO THE AREA FROM THE NORTH THROUGH TONIGHT.
1237 PM CDT SUN AUG 23 2015 CORE OF INTENSE UPPER LEVEL LOW SLIPPING EASTWARD ACROSS NORTHERN MINNESOTA. AS SECONDARY BAND OF PRESSURE RISES BEHIND UPPER TROUGH OF 2-3 HPA/3H PUSH THROUGH NORTHEASTERN SD IN THE PREDAWN HOURS. GREATEST INSTABILITY OF THE LOWER LEVELS REMAINS BELOW THE CLOUD DECK AS IT PUSHES THROUGH THE I-29 CORRIDOR. HAVE NEITHER EXPANDED ADVISORY THROUGH THE NORTHERN BUFFALO RIDGE LOCATIONS IN SW MN NOR EXTENDED ACROSS THE EXTREME EAST CENTRAL PORTIONS OF SD. WITH VERY DRY AIR AND DIMINISHED WINDS WITHIN THE RIDGE AXIS TONIGHT AS IT DRIFTS OVER THE WESTERN HALF OF THE CWA TONIGHT.
A COLD FRONT WILL SHIFT EAST QUICKLY THIS EVENING. WITH HIGH PRESSURE REESTABLISHING OVER THE OHIO VALLEY. DRY AND PLEASANT WEATHER IS EXPECTED FOR THE ENTIRE WORK WEEK AS THE HIGH REMAINS THE DOMINANT WEATHER FEATURE. LINE OF SHOWERS AND THUNDERSTORMS IS HAVING TROUBLE DEVELOPING OVER PORTIONS OF EASTERN ILLINOIS AND WESTERN INDIANA AS THE LOW LEVELS REMAIN EXTREMELY DRY. GENERALLY WENT WITH A MOS BLEND FOR LOW TEMPERATURES TONIGHT IN THE LOW TO MID 50S WHICH SEEMS VERY REASONABLE. FORECAST CHALLENGES ARE MINIMAL AS STRONG HIGH PRESSURE BUILDS IN A FAIRLY STRONG UPPER LOW FOR THIS TIME OF YEAR WILL ROTATE SLOWLY THROUGH THE GREAT LAKES. THIS WILL ALLOW A BROAD UPPER TROUGH WITH COOL CYCLONIC FLOW OVER THE REGION THROUGH AT LEAST MIDWEEK. THIS OCCURS AS A STRONG UPPER TROUGH FROM EASTERN ONTARIO TO SOUTHERN NEW ENGLAND MOVES EASTWARD AND WEAKENS.
349 PM EDT SUN AUG 23 2015 HIGH PRESSURE RIDGE OVER PENNSYLVANIA WILL SLOWLY WEAKEN AS A COLD FRONT APPROACHES AND THEN MOVES ACROSS THE REGION MONDAY. A RELATIVELY DEEP MID-TROPOSPHERIC TROUGH WILL DOMINATE THE PATTERN OVER PENNSYLVANIA FOR THE REMAINDER OF THE WEEK. MINS WILL RANGE FROM MID TO UPPER 50S NORTH TO THE LOWER 60S SOUTHEAST. MOISTURE POOLS LONGEST OVER MY SOUTHEAST AND THAT IS WHERE POPS REMAIN THE HIGHEST MONDAY AFTERNOON AND EVENING. HIGHS WILL RANGE FROM THE LOWER TO MIDDLE 70S NORTHWEST TO THE MIDDLE 80S SOUTHEAST. THE LARGE UPPER LEVEL LOW CONTINUES TO TAKE SHAPE CURRENT MODEL GUIDANCE SHOWS THE CORRESPONDING FRONT COULD STALL DUE TO LACK OF STRONG FLOW ALOFT. ALL MED RANGE GUIDANCE CONTINUES TO INDICATE MID- LATE WEEK WX WILL BE DOMINATED BY LINGERING UPPER TROUGH OVR THE NORTHEAST CONUS.
339 PM EDT SUN AUG 23 2015 AN UPPER LEVEL LOW PRESSURE SYSTEM WILL MOVE OVER THE GREAT LAKES REGION THIS WEEK, AND PROVIDE FOR UNSETTLED WEATHER IN THE NORTHEAST.
CURRENT SURFACE OBS SHOW THAT THE COLD FRONT HAS SLOWED AS EXPECTED AND AT 3 PM EXTENDED FROM NEAR MIDLAND TO WICHITA FALLS TO FORT SMITH ARKANSAS. SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP ALONG AND AHEAD OF THE COLD FRONT BUT MOST ACTIVITY SHOULD DISSIPATE AFTER SUNSET.
417 PM EDT SUN AUG 23 2015 A COLD FRONT WILL MOVE THROUGH THE REGION THIS EVENING. THEN HIGH PRESSURE WILL SLOWLY PUSH INTO THE AREA WITH THE CENTER OF THE HIGH NOT MOVING IN UNTIL LATE IN THE WEEK. A STRONG LOW PRESSURE CENTERED IN THE NORTHERN GREAT LAKES WILL KEEP COOLER THAN NORMAL TEMPERATURES THROUGH MID WEEK. COLD FRONT CURRENTLY EXTENDING FROM THE EASTERN EDGE OF LAKE MI. STRONG RIDGE OVER THE SW US COMBINED WITH A DEEP LOW OVER NRN GREAT LAKES WILL KEEP WNW UPR FLOW OVER MUCH OF AREA.
122 PM EDT SUN AUG 23 2015 A COLD FRONT WILL MOVE THROUGH THE REGION LATE THIS AFTERNOON AND THIS EVENING. THEN HIGH PRESSURE WILL SLOWLY PUSH INTO THE AREA WITH THE CENTER OF THE HIGH NOT MOVING IN UNTIL LATE IN THE WEEK. COLD FRONT WILL APPROACH THIS AFTERNOON FROM THE WEST. FORECAST AREA WILL BE BETWEEN A LARGE LOW PRESSURE SYSTEM TRACKING ACROSS ONTARIO AND A RIDGE OF HIGH PRESSURE BUILDING THROUGH THE MISSISSIPPI VALLEY INTO THE TENNESSEE VALLEY.
131 PM EDT SUN AUG 23 2015 HIGH PRESSURE WILL BUILD INTO THE AREA FROM THE NORTH THROUGH TONIGHT.
THERMAL TROUGHING WILL BE IN PLACE WITH 850 MB TEMPS HOLDING GENERALLY IN THE 11C-14C RANGE. WE WILL SEE LOW TEMPERATURES IN THE 50S FOR MON NT AND TUES NT WITH HIGHS IN THE LOWER 80S WEST OF PLATEAU. HUMIDITY LEVELS WILL BE LOW WITH DEWPOINTS IN THE LOWER TO MID 50S.
638 PM EDT SUN AUG 23 2015 HIGH PRESSURE WILL BUILD INTO THE AREA FROM THE NORTH THROUGH TONIGHT.
UPDATED TO ADD AREAS OF SMOKE AND HAZE FOR TODAY TO AREAS ALONG THE LOWER EASTERN SLOPES. BROUGHT IN BY LAST NIGHTS COLD FRONT. COLD FRONT HAS PUSHED A MASS OF RELATIVELY COOL STABLE AIR SOUTH ACROSS THE PLAINS. TEMPERATURES BEHIND THE COLD FRONT WILL BE ABOUT 15-20 DEGREES COOLER OVER THE EAST TODAY WITH COMFORTABLE HIGHS RANGING FROM THE MID 70S TO MID 80S. RANGING FROM JUST A COUPLE DEGREES COOLER IN SOME AREAS UP TO ABOUT 10 DEGREES COOLER IN OTHERS.
305 PM CDT SUN AUG 23 2015 WEAK HIGH PRESSURE ACROSS THE FORECAST AREA KEEPING LIGHT AND VARIABLE WINDS AND LOW LEVEL MOISTURE IN PLACE. SOME UPPER LEVEL RIDGING AND SUBSIDENCE HAS DEVELOPED OVER THE REGION TODAY. WATER VAPOR IMAGERY SHOWS AN UPPER LEVEL LOW OVER CANADA NORTHWEST OF THE GREAT LAKES. WITH AN UPPER LEVEL TROUGH FROM THIS FEATURE DOWN INTO THE SOUTHERN PLAINS. WITH AN UPPER LEVEL RIDGE FORMING OVER THE SOUTHWEST U.
THE VERY WARM UPPER LEVEL RIDGE OVER THE WESTERN U.
404 PM EDT SUN AUG 23 2015 UNSETTLED WEATHER WILL CONTINUE THROUGH THE FIRST HALF OF THE COMING WEEK AS ANOTHER COLD FRONT APPROACHES NEW ENGLAND ON MONDAY.
1206 PM CDT SUN AUG 23 2015 THE UPPER AIR PATTERN TONIGHT IS HIGHLIGHTED BY AN ELONGATED AREA OF HIGH PRESSURE EXTENDING FROM THE SWRN CONUS. LOW PRESSURE WAS NOTED OVER SRN NORTH DAKOTA WITH A SECOND AREA OF LOW PRESSURE OVER NRN SASKATCHEWAN. ANOTHER AREA OF LOW PRESSURE WAS LOCATED OFF SHORE OF THE ALASKA PANHANDLE. A COLD FRONT EXTENDED FROM NORTHERN MINNESOTA SWD INTO FAR SERN NEBRASKA. HIGH PRESSURE WILL BUILD SOUTHEAST FROM EAST CENTRAL WYOMING INTO CENTRAL AND EASTERN NEBRASKA. BREEZY NORTHWESTERLY WINDS THIS MORNING ACROSS NORTH CENTRAL NEBRASKA WILL DIMINISH LATER THIS AFTERNOON AS HIGH PRESSURE BUILDS OVHD. HIGH PRESSURE WILL CONTINUE TO SLOWLY BUILD EST OVERNIGHT TONIGHT.
130 PM CDT SUN AUG 23 2015 129 PM CDT A STRONG COLD FRONT EXTENDING FROM DEEP LOW PRESSURE OVER SWRN ONTARIO IS PUSHING THROUGH NRN INDIANA THIS AFTERNOON. SHOWERS AND THUNDERSTORMS HAD FORMED ALONG A PREFRONTAL TROUGH AND AN ELEVATED BOUNDARY BEHIND THE SFC COLD FRONT AND PUSHED THROUGH NRN IL/NWRN IN EARLIER TODAY. THE LATEST SATELLITE IMAGERY SHOWS THE WRAPAROUND CLOUDINESS ON THE SWRN PERIPHERY OF THE UPPER LOW GENERALLY REMAINING OVER NERN IA AND WI. THIS COOLER. COMBINED WITH CLEARING SKIES AND WINDS DIMINISHING TOWARD SUNRISE SHOULD ALLOW TEMPERATURES TO DROP INTO THE LOW TO MIDDLE 50S OVERNIGHT. THE URBAN HEAT ISLAND AREA OF THE CHICAGO METRO AREA SHOULD ONLY DROP TO THE LOW 60S.
354 PM EDT SUN AUG 23 2015 AN UPPER LEVEL LOW PRESSURE SYSTEM WILL MOVE OVER THE GREAT LAKES REGION THIS WEEK, AND PROVIDE FOR UNSETTLED WEATHER IN THE NORTHEAST.
LOOKING AT BREEZY CONDITIONS DEVELOPING ONCE AGAIN BY MONDAY AFTERNOON WITH HIGHS A LITTLE WARMER THAN TODAY.
401 PM EDT SUN AUG 23 2015 HIGH PRESSURE WILL REMAIN CENTERED OVER THE CANADIAN MARITIMES TONIGHT. A COLD FRONT WILL APPROACH FROM THE WEST MONDAY MORNING.
LIGHT SOUTHEAST WINDS SHOULD RETURN BY 04Z IN THE METROPLEX AHEAD OF A COLD FRONT. THE COLD FRONT HAS BEEN MAKING STEADY PROGRESS SOUTHWARD WITH SOME 4 MB/3 HR PRESSURE RISES IN CENTRAL OKLAHOMA. /ISSUED 420 AM CDT SUN AUG 23 2015/ THE NOCTURNAL MCS IN SOUTHEASTERN KANSAS IS NEARLY COINCIDENT WITH AN ADVANCING COLD FRONT.
226 PM CDT SUN AUG 23 2015 HIGH PRESSURE WAS THE DOMINANT SURFACE FEATURE ON THE HIGH PLAINS THIS AFTERNOON. COMBINING THAT WITH CLEAR SKY WILL ALLOW TEMPERATURES TO FALL INTO THE LOWER FORTIES AGAIN OVER MUCH OF CENTRAL AND NORTH CENTRAL NEBRASKA.
ALSO PUSHED THE HIGHER POPS A LITTLE FARTHER EASTWARD THROUGH THIS AFTERNOON. A TROUGH AXIS ALSO EXTENDS DOWN INTO THE RED RIVER VALLEY TO EASTERN SOUTH DAKOTA. THE ASSOCIATED UPPER LOW IS OVER NORTHERN MINNESOTA.
556 PM CDT SUN AUG 23 2015 DEEP LOW PRESSURE OVER ONTARIO WILL MOVE EAST TONIGHT AS HIGH PRESSURE BUILDS OVER THE DAKOTAS.
A COLD FRONT IS EXPECTED TO MOVE THROUGH THE REGION OVERNIGHT WHICH WILL GENERATE MORE SHOWERS AND THUNDERSTORMS. THE UPPER RIDGE IS CONTINUING IN RETREAT MODE WITH ANOTHER COOL POOL OF MID TO UPPER 60S DROPPING IN ON MOMENTUM ACROSS E OK. THIS FAVORABLE RAIN PATTERN WILL CONTINUE WITH ANOTHER COLD FRONT LATE TOMORROW.
200 PM EDT SUN AUG 23 2015 HIGH PRESSURE WILL REMAIN CENTERED OVER QUEBEC TODAY. A COLD FRONT WILL APPROACH FROM THE WEST MONDAY MORNING.
WITH WEAK HIGH PRESSURE BUILD- ING OVER THE REGION. BUT DESPITE THE AMPLIFIED UPPER LEVEL RIDGE JUST TO THE WEST WE SHOULD STAY DRY (POPS-WISE) DURING THIS TIME PERIOD. 41 OVERALL QUIET CONDITIONS OVER THE UPPER TEXAS COASTAL WATERS WITH LIGHT WINDS AND LOW SEAS AS WEAK HIGH PRESSURE BUILDS OVER THE NORTHWEST GULF.
311 PM EDT SUN AUG 23 2015 COLD FRONT WITH LIMITED MOISTURE SUNDAY NIGHT INTO MONDAY. AS A LARGE HIGH PRESSURE SYSTEM SAILS SLOWLY ACROSS. FOCUS THEN SHIFTS TO A COLD FRONT WHICH WILL MOVE THROUGH THE AREA LATE TONIGHT AND ON MONDAY. COLD FRONT TO THE EAST ON MONDAY. WITH HIGH PRESSURE BUILDING IN FROM THE WEST.
HIGH MOSTLY CLOUDY SKIES ASSOCIATED WITH COLDER AIR ALOFT BEHIND DEPARTING COLD FRONT WILL LINGER INTO MID/LATE AFTERNOON.
A RIDGE OF HIGH PRESSURE OVER THE REGION WILL PERSIST THROUGH THE EARLY PART OF THE WEEK. AXIS OF UPPER RIDGE REMAINS CENTERED OVER UTAH THIS AFTERNOON.
HIGH PRESSURE AND DRY WEATHER WILL REMAIN OVER THE AREA THROUGH THE WORK WEEK. AN UPPER LEVEL TROUGH MOVING THROUGH THE AREA BEGINS TO CUT OFF BY LATE WORK WEEK. SO IN THE HIGHER ELEVATIONS OF EAST TENNESSEE.