Aikyam-Lab/Synoptic-Bench huggingface dataset:
639 AM EDT SUN AUG 2 2015 HIGH PRESSURE WILL KEEP THINGS QUIET WITH NEAR NORMAL TEMPERATURES TO ROUND OUT THE WEEKEND. A COLD FRONT WILL BRING SHOWERS AND THUNDERSTORMS TO THE AREA MONDAY. SW FLOW DEVELOPS FOR TODAY AS RIDGE FLATTENS TO THE SOUTH AND EAST AND LOW PRESSURE MOVES INTO THE GREAT LAKES.
257 AM CDT SUN AUG 2 2015 MORNING WATER VAPOR IMAGERY AND REGIONAL RADAR DATA ARE VERY SIMILAR TO YESTERDAY MORNING WITH AN UPPER RIDGE STILL CENTERED JUST TO THE WEST OF NORTH TEXAS.
205 AM EDT SUN AUG 2 2015 DRY CONTINUES THIS WEEKEND UNDER HIGH PRESSURE. COLD FRONT CROSSES MONDAY NIGHT. WAVES OF LOW PRESSURE CROSS THROUGH MIDWEEK. DRIER AND COOLER TOWARD THE END OF THE WEEK. HIGH PRESSURE WILL GRADUALLY START TO SLIDE OFF TO THE EAST LATER TODAY. FOR SOMEWHAT WARMER TEMPERATURES. ALTHOUGH CLOUDS WILL GRADUALLY START TO INCREASE ACROSS THE FAR NORTH AS A COLD FRONT APPROACHES THE REGION. LATE MONDAY TO MONDAY NIGHT COLD FRONT EXPECTED. THE PRIMARY FACTOR IN THE LOW END POPS. BUT WITH THE MAIN AREA OF LOW PRESSURE OVER CENTRAL QUEBEC. A WAVE OF LOW PRESSURE BRINGS THE FRONT BACK INTO THE CENTRAL APPALACHIANS. HIGH PRESSURE PUSHES THE FRONT BACK TO THE SOUTH.
317 AM PDT SUN AUG 2 2015 COOLER WEATHER THIS WEEK.
A COLD FRONT WILL BRING SHOWERS MONDAY. WITH COOLER TEMPERATURES INTO THE MIDDLE OF THE WEEK. SOUTHWEST FLOW AHEAD OF AN APPROACHING COLD FRONT SUNDAY WILL GIVE INCREASING HIGH CLOUDS. WITH TEMPERATURES IN THE LOWER TO MID 80S. COLD FRONT WILL GRADUALLY APPROACH TONIGHT WITH INCREASING CLOUDS.
338 AM CDT SUN AUG 2 2015 A COLD FRONT MOVING SOUTH ACROSS THE STATE WILL BRING COOLER CONDITIONS THAN YESTERDAY. EARLY THIS SUNDAY MORNING A WEST-TO-EAST COLD FRONT EXTENDED FROM BETWEEN GRAND FORKS AND FARGO. NORTH WINDS OF 10 TO 20 MPH WILL USHER IN COOLER AIR. COOL HIGH PRESSURE AXIS WILL BE IN PLACE BY EARLY MONDAY MORNING.
WIDESPREAD HIGH PRESSURE EXPECTED TO CONTINUE ACROSS THE FORECAST AREA.
127 AM EDT SUN AUG 2 2015 DRY CONTINUES THIS WEEKEND UNDER HIGH PRESSURE. COLD FRONT CROSSES MONDAY NIGHT. WAVES OF LOW PRESSURE CROSS THROUGH MIDWEEK. DRIER AND COOLER TOWARD THE END OF THE WEEK. WITH THE HIGH CENTER SETTLING IN OVERHEAD TONIGHT. THE FOG WILL DISSIPATE QUICKLY SUNDAY MORNING AND BE REPLACED BY SUNSHINE AS HIGH PRESSURE CONTINUES. LATE MONDAY TO MONDAY NIGHT COLD FRONT EXPECTED. THE PRIMARY FACTOR IN THE LOW END POPS. BUT WITH THE MAIN AREA OF LOW PRESSURE OVER CENTRAL QUEBEC. A WAVE OF LOW PRESSURE BRINGS THE FRONT BACK INTO THE CENTRAL APPALACHIANS. HIGH PRESSURE PUSHES THE FRONT BACK TO THE SOUTH.
316 AM EDT SUN AUG 2 2015 HIGH PRESSURE WILL KEEP THINGS QUIET WITH NEAR NORMAL TEMPERATURES TO ROUND OUT THE WEEKEND. A COLD FRONT WILL BRING SHOWERS AND THUNDERSTORMS TO THE AREA MONDAY. SW FLOW DEVELOPS FOR TODAY AS RIDGE FLATTENS TO THE SOUTH AND EAST AND LOW PRESSURE MOVES INTO THE GREAT LAKES.
HIGH PRESSURE AT THE SURFACE WILL BE CENTERED OVER KY THROUGH THE PERIOD.
LOOKS LIKE THE NAM PROJECTS A LOW LEVEL BOUNDARY TO SET UP THIS AFTERNOON ALONG THE WYOMING AND COLORADO STATE LINE WITH A NICE 850/700 MB THETA-E RIDGE AXIS OVER NORTHERN COLORADO.
A CLOSED LOW PRESSURE SYSTEM HAS BEGUN TO DEEPEN OVER APALACHEE BAY. DEEPENING OF THE LOW AND SUBSEQUENT TIGHTENING OF THE PRESSURE GRADIENT WILL INCREASE LOW LEVEL CONVERGENCE. AS THE LOW SLOWLY TRACKS NORTHEAST ACROSS OUR AREA BANDS OF MODERATE TO HEAVY RAINFALL WILL DEVELOP.
WEAK H5/H3 LOW PRESSURE WILL MEANDER ACROSS CUBA EARLY THIS WEEK.
MID TO HIGH LEVEL CLOUDS ARE BEGINNING TO MOVE IN FROM THE SOUTH AND WEST AS THE MONSOON MOISTURE CIRCLES AROUND THE RIDGE. SUNDAY TEMPERATURES WILL BE WITHIN A FEW DEGREES OF RECORD HIGHS AS THE RIDGE REMAINS OVER THE REGION. AS THE CLOUDS MOVE IN SUNDAY NIGHT BEHIND A WEAKENING RIDGE.
A COLD FRONT WILL APPROACH FROM THE NORTHWEST LATE IN THE WEEK.
CONVECTION IS EXPECTED TO DEVELOP ACROSS THE COASTAL SECTIONS SUNDAY AND MOVE INLAND AS A WEAK 500MB INVERTED TROUGH MOVES ACROSS NORTHEAST MEXICO SUN AFTERNOON. THE WEAK 500MB LOW/INVERTED TROUGH ACROSS THE WESTERN GULF OF MEXICO THIS AFTERNOON WILL CONTINUE TO PROVIDE LOW TO MID LEVEL MOISTURE OVER THE WESTERN GULF OF MEXICO AND ALONG THE LOWER TEXAS COAST. LINGERING MOISTURE COMBINED WITH DAYTIME HEATING WILL PROVIDE A BETTER CHANCE OF SHOWERS AND THUNDERSTORMS ACROSS THE LOWER PORTIONS OF THE RIO GRANDE VALLEY ON SUNDAY.
422 AM EDT SUN AUG 2 2015 THE LOCAL AREA WILL BE UNDER THE INFLUENCE OF WEAK HIGH PRESSURE INTO MONDAY.
116 AM EDT SUN AUG 2 2015 VFR CONDITIONS AND LIGHT TO CALM WINDS ARE FORECAST THROUGH THE TAF PERIOD AT ALL SITES AS HIGH PRESSURE AND A DRY NW FLOW ALOFT WILL REMAIN OVER THE REGION THROUGH TODAY AND TONIGHT.
1230 AM CDT SUN AUG 2 2015 FOR 06Z TAFS /ISSUED 918 PM CDT SAT AUG 1 2015/ AT 915 PM TEMPS WERE RANGING FROM THE LOWER 80S OVER NWRN AL TO THE LOW 70S IN NERN AL. DEWPOINTS WERE MAINLY IN THE LOW TO MID 60S. AT THE SFC A LARGE AREA OF HIGH PRESSURE COVERS THE REGION.
350 AM EDT SUN AUG 2 2015 HIGH PRESSURE WILL KEEP FAIR WEATHER OVER THE REGION TODAY. A COLD FRONT IS EXPECTED TO PASS THROUGH ON MONDAY.
WEAK HIGH PRESSURE BRINGS DRIER CONDITIONS LATE THIS MORNING THROUGH TODAY BEFORE ANOTHER DISTURBANCE BRINGS MORE WIDESPREAD SHOWERS AND STORMS TO THE REGION LATER SUNDAY NIGHT INTO MONDAY NIGHT. MID-LEVEL SHORT WAVE TROUGH CONTINUES TO MOVE ACROSS NRN VT INTO NRN NEW ENGLAND.
HIGH PRESSURE BUILDS OVER THE REGION SUNDAY THROUGH MONDAY.
331 AM CDT SUN AUG 2 2015 HIGH PRESSURE RIDGE IS ORIENTED FROM EASTERN OK. WHILE A COLD FRONT IS LOCATED OVER THE NORTHERN PLAINS/MISS VALLEY. 00Z FORECAST MODELS SHOW MORE ACTIVE WEATHER PATTERN DURING MID AND LATE WORK WEEK AS IL IS ESTABLISHED IN A WNW UPPER LEVEL FLOW WITH LARGE UPPER LEVEL LOW OVER NE CANADA AND UPPER LEVEL RIDGE OVER THE SOUTHERN ROCKIES.
303 AM CDT SAT OCT 17 2015 A MID/UPPER RIDGE OVER THE ROCKIES IS PROGGED TO TRANSLATE EASTWARD ACROSS THE CENTRAL PLAINS STATES TODAY. CLOUD COVER WILL LIKELY IMPACT HIGH TEMPERATURES AND TRENDED VALUES LOWER ACROSS THE AREA WITH HIGHS IN THE LOWER 60S ANTICIPATED. SOUTHERLY WINDS WILL INCREASE ON SUNDAY AS LOW PRESSURE DEEPENS ACROSS THE HIGH PLAINS. A MID/UPPER TROUGH IS PROGGED TO MOVE SLOWLY EASTWARD OVER THE SOUTHWEST STATES THROUGH MIDWEEK LIFTING OVER THE CENTRAL AND NORTHERN PLAINS LATE IN THE WEEK.
125 AM EDT SAT OCT 17 2015 COOLER AIR WILL CONTINUE TO FILTER INTO THE REGION THIS WEEKEND. THESE SHOWERS SEEM TO CORRESPOND WELL TO WEAK MID LEVEL TROUGHING MOVING THROUGH THE AREA AND MID LEVEL COOL POCKET/STEEP MID LEVEL LAPSE RATES. MINS SHOULD DROP TO AROUND THE FREEZING MARK. LOW LEVEL RIDGE AXIS TO APPROACH WESTERN GREAT LAKES SATURDAY NIGHT/SUNDAY MORNING WHICH SHOULD ALLOW FOR BETTER DECOUPLING/RADIATIONAL COOLING. FREEZE WATCH LEFT IN PLACE FOR THIS PERIOD FOR ENTIRE FORECAST AREA EXCEPT FOR BERRIEN COUNTY WHERE MARINE INFLUENCE SHOULD KEEP MINS ABOVE THE FREEZING MARK.
440 AM CDT SAT OCT 17 2015 RIDGING STILL THE MAIN INFLUENCE OF THE WEATHER OVER SETX THIS MORNING. AT 850 RIDGE AXIS FROM DFW TO BPT TO NEW WILL HELP TO MAINTAIN THE FLOW SEEN IN VWP - DRY NE FLOW THROUGH 8KFT. DIFFUSE COLD FRONT NEAR RKP AND EXTENDING EAST ACROSS THE FAR COASTAL WATERS. SURFACE RIDGING WILL SAG SOUTHWARD THROUGH THE DAY MAKING FOR A LITTLE COOLER WEATHER AND STILL VERY DRY. DEWPOINTS SHOULD MIX OUT TO THE LOWER TO MID 30S ACROSS THE NORTH AND 40-50 ACROSS THE SOUTH MAKING FOR A VERY PLEASANT AFTERNOON.
WITH ISOLATED TO SCATTERED AFTERNOON SHOWERS AND STORMS CONFINED TO THE HIGHER TERRAIN. UPPER LOW. LIKELY KEEPING MIN TEMPS SEVERAL DEGREES WARMER THAN LAST NIGHT MOST LOCATIONS. UPPER RIDGE DRIFTS SLOWLY EASTWARD WHILE SOUTHWESTERN U. UPPER LOW BEGINS TO WEAKEN AND LIFT NORTHWARD INTO THE GREAT BASIN. WHILE READINGS ACROSS THE HIGHER TERRAIN AND OVER MOST INTERIOR VALLEYS STAY RELATIVELY UNCHANGED.
HIGH PRESSURE RIDGE WILL KEEP MOSTLY CLEAR SKIES AND LIGHT WINDS OVER CENTRAL AND SOUTHWEST MT TONIGHT. MAINLY CLEAR SKIES, LIGHT WINDS AND WARMER THAN AVERAGE TEMPERATURES WILL CONTINUE THROUGH SATURDAY. CLOUD-COVER INCREASES FROM SOUTH TO NORTH SATURDAY NIGHT AND SUNDAY AS THE RIDGE WEAKENS AND FLOW ALOFT BECOMES SOUTHERLY. MODELS CONTINUE TO DELAY THE ARRIVAL OF BETTER MOISTURE AND LIFT EJECTING OUT OF THE PACIFIC TROUGH WITH SW MT SEEING A CHANCE FOR SHOWERS AS EARLY AS SATURDAY EVENING.
MOISTURE GRADIENT REMAINS OVER SOUTH FLORIDA AS HIGH PRESSURE CENTERED OVER TN VLY GRADUALLY BUILDS TOWARD THE AREA. HIGH PRESSURE SURGES SOUTH.
LOWS TONIGHT WILL DROP INTO THE LOW 30S WITH WIDESPREAD FROST EXPECTED.
240 AM PDT SAT OCT 17 2015 LOW PRESSURE ALOFT WILL BRING THE POSSIBILITY OF MAINLY AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS TO THE MOUNTAINS AND DESERTS THROUGH SUNDAY.
556 AM EDT SAT OCT 17 2015 A DEEP UPPER LEVEL TROUGH OVER EASTERN CANADA AND THE NORTHEAST CONUS WILL BRING BELOW NORMAL TEMPERATURES TO CENTRAL PA THIS WEEKEND. WIDESPREAD NIGHTTIME FREEZING CONDITIONS WILL LIKELY END TO THE GROWING SEASON. HOWEVER THE PLACEMENT IS SLIGHTLY SW OF THE LOWER RES MODEL CONSENSUS. EITHER WAY THE HIGHEST POPS WILL BE FOCUSED OVER THE NW MTNS IN CLOSE PROXIMITY/DOWNWIND OF LAKE ERIE. A LIGHT NW FLOW GRADIENT AND STRATOCU CLOUDS WILL TRY TO PROP UP TEMPS AND LATEST BLENDS ACTUALLY CAME IN A LITTLE WARMER THAN PREVIOUS FCST. THE 850MB THERMAL TROUGH /-4C TO -8C/ WILL MOVE THROUGH ON SUNDAY WITH ONE MORE DAY OF SEASONABLY COLD.
431 AM CDT SAT OCT 17 2015 WINDS HAVE REMAIN UP OVERNIGHT AND THIS HAS HELP MIX THE LOWER ATMOSPHERE ENOUGH TO HOLD TEMPERATURES IN THE LOWER 60S. CLEAR SKIES WILL PREVAIL TODAY OVER THE REGION AS HIGH PRESSURE ALOFT AND AT THE SURFACE WILL DOMINATE THE WEATHER PATTERN OVER THE WEEKEND AND INTO THE COMING WEEK AHEAD.
NEAR OR BELOW FREEZING TEMPERATURES ARE EXPECTED SATURDAY NIGHT AND ESPECIALLY SUNDAY NIGHT. AN AREAWIDE INCREASE IN SHOWERS WILL THEN OCCUR THIS EVENING AS A STRONG SECONDARY COLD FRONT DROPS THROUGH THE REGION. 850MB TEMPERATURES WILL SLIP TO WELL BELOW FREEZING. EVEN 925MB TEMPERATURES ARE PROJECTED TO AROUND FREEZING. EXPECTING A BRISK DAY SATURDAY WITH HIGHS MAINLY IN THE LOWER TO MID 40S /SOME UPPER 40S-NEAR 50 IN WYOMING-DELAWARE VALLEYS/. H5 TROF STARTS LIFTING EAST OF THE REGION AS A FLAT UPPER LEVEL RIDGE BEGINS BUILDING IN.
336 AM EDT SAT OCT 17 2015 SURFACE ANALYSIS CONTINUES TO SHOW HIGH PRESSURE BUILDING ACROSS THE REGION THIS MORNING. THIS HIGH IS GENERALLY CENTERED ACROSS THE MIDWEST. MODELS ARE IN GOOD AGREEMENT WITH THIS HIGH SLOW SETTLING SE THROUGH THE REMAINDER OF THE PERIOD. UPPER LEVEL WISE WE STILL HAVE THE BROAD TROUGH IN PLACE ACROSS THE EASTERN CONUS THIS MORNING. THIS BROAD TROUGH IS FORECAST TO MOVE EAST THROUGH THE PERIOD AND INTRODUCE SOME HEIGHT RISES. THE MAIN CONCERN THROUGH THE SHORT TERM WILL BE THE FREEZING TEMPERATURES EXPECTED ACROSS MUCH OF THE REGION TONIGHT. TEMPERATURES TONIGHT WILL FALL INTO THE MID TO UPPER 20S IN THE VALLEYS AND LOWER 30S ON THE RIDGES. WITH 850MB TEMPS BELOW FREEZING AREA WIDE TODAY AND SUNDAY LEAVING HIGHS IN MID TO UPPER 50S. HIGH PRESSURE CONTINUES TO BUILD SOUTH ACROSS THE REGION.
WATER VAPOR SHOWS A LARGE UPPER LOW APPROACHING THE PACIFIC NORTHWEST THIS EVENING. THE LOW MOVES SLOWLY ACROSS THE PACIFIC NORTHWEST AND NORTHERN CALIFORNIA SATURDAY AND SUNDAY. HIGH TEMPERATURES WILL BE COOLER THIS WEEKEND DUE TO CLOUD COVER AND PRECIPITATION.
225 AM CDT SAT OCT 17 2015 THANKS TO A COLD CANADIAN 1032 MBAR HIGH PRESSURE AREA THE FIRST FROST OF THE SEASON IS EXPECTED THIS MORNING AS TEMPS DROP INTO THE 30S TOWARD SUNRISE. TEMPS SUNDAY MORNING WILL BE A LITTLE COLDER THAN THIS MORNING WITH FREEZING TEMPS IN THE 30 TO 32 DEGREE RANGE POSSIBLE IN THE UPPER CUMBERLAND AND ALONG THE KENTUCKY BORDER. WITH TROF IN THE EAST AND RIDGE OUT WEST.
IT WILL BE ANOTHER COOL NIGHT TONIGHT BUT A BIT WARMER THAN LAST NIGHT. LOW LYING AND SHELTERED AREAS WILL SEE TEMPERATURES NEAR OR SLIGHTLY BELOW FREEZING. THE WATER VAPOR LOOP SHOWED A HIGH AMPLITUDE RIDGE TO THE WEST WITH DRY NORTHWESTERLY FLOW ALOFT OVER THE CWA. A TROUGH EXTENDING FROM CALIFORNIA INTO THE EASTERN PACIFIC WAS TRANSPORTING ABUNDANT MOISTURE INTO THE SOUTHWEST U. THE 12Z MODEL GUIDANCE HAS A GOOD HANDLE ON THE SHORT TERM AS THE UPPER RIDGE TO THE WEST SLIDES EAST ACROSS THE FRONT RANGE AND PLAINS THIS WEEKEND. GUSTY SOUTHERLY WINDS WILL EBB THIS EVENING AS THE LOW LEVEL JET DECREASES AND BOUNDARY LAYER WIND DECOUPLE.
AS AN UPPER LEVEL TROUGH SWINGS INTO THE EAST COAST THROUGH THE REST OF THE WEEKEND. TEMPERATURES ON SUNDAY WILL BE A FEW DEGREES COOLER.
UPPER LOW. LIKELY KEEPING MIN TEMPS SEVERAL DEGREES WARMER THAN LAST NIGHT MOST LOCATIONS. UPPER RIDGE DRIFTS SLOWLY EASTWARD WHILE SOUTHWESTERN U. UPPER LOW BEGINS TO WEAKEN AND LIFT NORTHWARD INTO THE GREAT BASIN. WHILE READINGS ACROSS THE HIGHER TERRAIN AND OVER MOST INTERIOR VALLEYS STAY RELATIVELY UNCHANGED.
158 AM EDT SAT OCT 17 2015 A COLD FRONT WILL MOVE THROUGH THE REGION THIS EVENING BRINGING THE COLDEST AIR MASS OF THE SEASON THUS FAR. A WIDESPREAD HARD FREEZE IS EXPECTED BOTH SATURDAY AND SUNDAY EVENING WITH A CHANCE OF SNOW SHOWERS DEVELOPING IN THE HIGHER ELEVATIONS OF BOTH THE GREENS IN VERMONT AND THE ADIRONDACKS IN NORTHERN NEW YORK.
Based on wind and pressure tendencies over the past couple hours, it appears that as of 07Z the surface cold front has cleared most of our forecast area (except the Florida Big Bend).
300 AM EDT SAT OCT 17 2015 WEAK LOW PRESSURE CROSSING NORTHERN NEW ENGLAND TODAY WILL DRIVE A TRAILING COLD FRONT THROUGH THE REGION. HIGH PRESSURE WILL GRADUALLY BUILD IN FROM THE WEST TONIGHT THROUGH SUNDAY.
514 AM CDT SAT OCT 17 2015 DRY AIR AND BUILDING HIGH PRESSURE ACROSS THE MID-SOUTH EXPECTED TO KEEP VFR CONDITIONS RUNNING THROUGH THE CYCLE.
THE MID/UPPER LEVEL TROUGH CONTINUES TO DIG ACROSS THE EASTERN GREAT LAKES TODAY WITH SOUTHERN WISCONSIN IN THE STRONG NORTHWEST FLOW ON THE BACKSIDE OF THE TROUGH. AS THE LOW LEVELS MIX OUT DURING THE AFTERNOON. EXPECT FREEZING TEMPERATURES AGAIN TONIGHT.
226 AM EDT SAT OCT 17 2015 SCATTERED SHOWERS ARE EXPECTED OVERNIGHT WITH THE PASSAGE OF A COLD FRONT. SCATTERED SHOWERS WILL CONTINUE OVERNIGHT AS A COLD FRONT CROSSES THE REGION. GRAUPEL MAY MIX IN WITH PRECIPITATION OVER THE NEXT COUPLE HOURS WITH THE OOZ PITTSBURGH SOUNDING SHOWING THE FREEZING LEVEL JUST ABOVE 4000FT. UPPER TROUGHING. PERSISTENT BROAD UPPER TROUGHING IS PROGGED ACROSS THE REGION THROUGH THE WEEKEND. TEMPERATURES AT OR BELOW FREEZING ARE LIKELY SAT NIGHT.
510 AM EDT SAT OCT 17 2015 A LARGE CANADIAN HIGH PRESSURE SYSTEM WILL BUILD SOUTHEAST INTO THE OHIO VALLEY THIS WEEKEND BECOMING CENTERED OVER THE REGION SUNDAY. THIS HIGH WILL PROVIDE DRY WEATHER. WIDESPREAD FROST AND FREEZING TEMPERATURES.
215 AM EDT SAT OCT 17 2015 CANADIAN HIGH PRESSURE MOVES ACROSS THIS WEEKEND.
116 AM EDT SAT OCT 17 2015 A COLD FRONT WILL MOVE THROUGH THE REGION THIS EVENING BRINGING THE COLDEST AIR MASS OF THE SEASON THUS FAR. A WIDESPREAD HARD FREEZE IS EXPECTED BOTH SATURDAY AND SUNDAY EVENING WITH A CHANCE OF SNOW SHOWERS DEVELOPING IN THE HIGHER ELEVATIONS OF BOTH THE GREENS IN VERMONT AND THE ADIRONDACKS IN NORTHERN NEW YORK.
144 AM EDT SAT OCT 17 2015 A LARGE CANADIAN HIGH PRESSURE SYSTEM WILL BUILD SOUTHEAST INTO THE REGION OVER THE WEEKEND BECOMING CENTERED OVER THE OHIO VALLEY SUNDAY. THE HIGH WILL PROVIDE DRY WEATHER. WIDESPREAD FROST AND FREEZING TEMPERATURES THIS WEEKEND.
316 AM CDT SAT OCT 17 2015 The region will remain under northwesterly flow aloft through tonight before the mid-level ridge over the Rockies shifts eastward over the area by Sunday. So while temperatures may linger in the 50s for much of the morning, the clearing skies along with light southeasterly winds should help afternoon high temperatures to rise into the low/mid 60s. With this in mind, have trended warmer with temperatures for tonight with lows generally in the mid 40s.
A SPLITTING UPPER LOW WILL MOVE INTO THE NRN CA LATE TODAY. THE MAIN UPPER LOW CONTINUES EASTWARD ON SUNDAY REACHING THE NRN CA/NV BORDER BY LATE AFTERNOON.
upper low drops southward across NorCal which will keep us a bit unstable but airmass really dries out. Most instability remains in the higher terrain so have ketp forecast consistent and left main chance of moisture in the higher elevations.
DRY AND COOL WEATHER IS EXPECTED THE NEXT SEVERAL DAYS AS A LARGE HIGH PRESSURE SYSTEM OVER THE UPPER MIDWEST WILL BUILD ACROSS THE GREAT LAKES AND THE OHIO VALLEY PROVIDING MOSTLY SUNNY DAYS AND MOSTLY CLEAR NIGHTS. AS THE HIGH MOVES TO OUR EAST ON SUNDAY NIGHT. SURFACE ANALYSIS EARLY THIS MORNING SHOWS A GARGANTUAN AREA OF HIGH PRESSURE CENTERED OVER IOWA AND MINNESOTA. THE HIGH PRESSURE SYSTEM WAS INFLUENCING THE WEATHER FROM THE EAST COAST. REMEMBER YESTERDAY? OTHER THAN BEING ABOUT 10 DEGREES COOLER. ALONG WITH THE LEE SIDE OF THE UPPER RIDGE OVER THE ROCKIES.
133 AM EDT SAT OCT 17 2015 AN AMPLIFIED UPPER LEVEL TROUGH OVER EASTERN CANADA WILL DOMINATE THE REGIONAL WEATHER PATTERN THROUGH THE WEEKEND WITH TEMPERATURES AVERAGING BELOW NORMAL.
A ridge of high pressure will continue to be the dominant feature over the Northern Rockies today. This ridge is causing a very warm airmass to remain over the region, but very little afternoon mixing is keeping the valleys from reaching full potential warmth. The overall consensus is that the region will be cooler with scattered showers.
1113 PM MDT FRI OCT 16 2015 UPPER RIDGE AXIS CENTERED OVER THE ROCKIES WILL SLIDE EAST TO THE CENTRAL PLAINS ON SATURDAY. HIGH PRESSURE IN THE UPPER MISSISSIPPI RIVER VALLEY WILL ALSO SLIDE EAST WITH RESULTING INCREASE IN SOUTHERLY WINDS LOCALLY THROUGH TONIGHT. LEE TROUGH IN EASTERN COLORADO SATURDAY WILL DECREASE THE WINDS SOMEWHAT NEAR THE COLORADO BORDER AREA WITH BREEZY SOUTH WINDS CONTINUING FURTHER EAST THROUGH SATURDAY AFTERNOON. THEN WARMING ON SATURDAY TO THE LOWER TO MIDDLE 70S.
A RIDGE OF HIGH PRESSURE WILL BUILD INTO THE AREA FROM THE NORTHERN MISSISSIPPI VALLEY BY SUNDAY MORNING. THE HIGH WILL BE CENTERED OVER OHIO SUNDAY AFTERNOON CUTTING OFF THE LAKE EFFECT PRECIPITATION.
SURFACE RIDGING DOMINATING THE EASTERN HALF OF THE LOWER 48 STATES WILL MAINTAIN AN E-NE SURFACE FLOW OVER THE RGV WHICH MAY ALLOW A LITTLE DRIER AIR TO PERSIST OVER THE REGION THROUGH THE OVERNIGHT HOURS INTO TOMORROW. OVERNIGHT LOW TEMPERATURES TONIGHT AND SATURDAY NIGHT WILL RAGE FROM THE MID 60S ACROSS THE NORTHERN RANCHLANDS TO THE LOWER 70S NEAR THE COAST.
MIXING PROMOTED BY THESE WINDS IS HELPING TO KEEP TEMPS A LITTLE WARMER THAN THEY OTHERWISE MIGHT BE ALTHOUGH APPARENT TEMPERATURES THROUGH 10 TO 11 AM MAY NECESSITATE A LIGHT JACKET FOR OUTDOOR ACTIVITIES. TEMPERATURES WILL BE NOTICEABLY COOLER THAN YESTERDAY. HIGH TEMPERATURES SHOULD BE 1 TO 2 DEGREES COOLER THAN TODAY.
COLD FRONT CONTINUES TO PUSH THROUGH THE LOCAL AREA WITH IT ROUGHLY SITUATED FROM COLUMBUS TO JUST NORTH OF MACON. COLDER AIR TO RUSH IN TONIGHT WITH GUIDANCE CONTINUING TO TREND COOLER WITH SOME UPPER 30S FOR THE NE MOUNTAINS AND NOW SOME OVER NW GA AS WELL.
410 AM EDT SAT OCT 17 2015 THE COLDEST TEMPERATURES OF THE SEASON HAVE ARRIVED IN THE WAKE OF A PASSING COLD FRONT.
A WEAK UPPER TROUGH WILL SLOWLY ACROSS THE PACIFIC NORTHWEST TODAY AND SUNDAY.
353 AM CDT SAT OCT 17 2015 PIECE OF ENERGY ROTATING INTO THE GREAT LAKES TROUGH THIS MORNING HELPING TO TIGHTEN UP MID LEVEL FRONTOGENESIS ACROSS THE AREA. TEMPS WHICH WERE MUCH COOLER EARLIER IN THE NIGHT HAVE RISEN WELL ABOVE FREEZING. AND HAVE DROPPED SEVERAL COUNTIES FROM THE FREEZE WARNING FROM CLAY IA SOUTHWARD TO ACCOUNT FOR THESE WARMER TEMPS UNDER THE CLOUDS. COULD DRIVE TEMPS BACK DOWN TOWARD THE LOWER TO MID 30S.
344 AM EDT SAT OCT 17 2015 SURFACE ANALYSIS CONTINUES TO SHOW HIGH PRESSURE BUILDING ACROSS THE REGION THIS MORNING. THIS HIGH IS GENERALLY CENTERED ACROSS THE MIDWEST. MODELS ARE IN GOOD AGREEMENT WITH THIS HIGH SLOW SETTLING SE THROUGH THE REMAINDER OF THE PERIOD. UPPER LEVEL WISE WE STILL HAVE THE BROAD TROUGH IN PLACE ACROSS THE EASTERN CONUS THIS MORNING. THIS BROAD TROUGH IS FORECAST TO MOVE EAST THROUGH THE PERIOD AND INTRODUCE SOME HEIGHT RISES. THE MAIN CONCERN THROUGH THE SHORT TERM WILL BE THE FREEZING TEMPERATURES EXPECTED ACROSS MUCH OF THE REGION TONIGHT. TEMPERATURES TONIGHT WILL FALL INTO THE MID TO UPPER 20S IN THE VALLEYS AND LOWER 30S ON THE RIDGES. WITH 850MB TEMPS BELOW FREEZING AREA WIDE TODAY AND SUNDAY LEAVING HIGHS IN MID TO UPPER 50S. HIGH PRESSURE WILL REMAIN THE DRIVING FORCE THROUGH THE EXTENDED.
346 AM PDT SAT OCT 17 2015 A SLOW MOVING UPPER LEVEL LOW PRESSURE SYSTEM OVER SOUTHERN CALIFORNIA WILL MOVE INTO ARIZONA TODAY MAINTAINING THE CHANCE OF MAINLY AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS MAINLY FOR THE MOUNTAINS AND DESERTS.
A RIDGE OF HIGH PRESSURE WILL CONTINUE TO BUILD INTO THE SOUTHERN APPALACHIANS WITH DRY NORTHWEST FLOW ALOFT.
616 AM EDT SAT OCT 17 2015 THE COLDEST TEMPERATURES OF THE SEASON HAVE ARRIVED IN THE WAKE OF A PASSING COLD FRONT.
THIS SYSTEM MAY PRODUCE LOCAL LIGHT RAIN ON SATURDAY MORNING AS A COLD FRONT SWEEPS ACROSS THE REGION.
251 AM CDT SAT OCT 17 2015 PRIMARY CHALLENGE FOR THE SHORT TERM PERIOD WILL BE SKY TRENDS AND TEMPERATURES AS HIGH PRESSURE DOMINATES THE PATTERN THROUGH THE WEEKEND. RIDGE OF HIGH PRESSURE WILL SHIFT EAST BY MID AFTN AND CALM TO WEAK WESTERLY SFC WINDS WILL TURN MORE SOUTHEASTERLY IN THE DVL BASIN REGION BY MID AFTN. THIS WILL HELP TEMPS ONCE AGAIN CLIMB INTO THE LOW TO MID 50S. SOUTHEAST WINDS WILL THEN SPREAD ACROSS MOST OF THE REGION DURING THE OVERNIGHT HOURS AND PROVIDE ENOUGH WEAK MIXING AND WARM ADVECTION TO KEEP TEMPS IN THE LOW TO MID 30S. WITH DAYTIME HIGHS IN THE LOW TO MID 60S.
NEAR TERM AND SHORT TERM SECTIONS HAVE BEEN UPDATED BELOW DRY AND COOL WEATHER IS EXPECTED THE NEXT SEVERAL DAYS AS A LARGE HIGH PRESSURE SYSTEM OVER THE UPPER MIDWEST WILL BUILD ACROSS THE GREAT LAKES AND THE OHIO VALLEY PROVIDING MOSTLY SUNNY DAYS AND MOSTLY CLEAR NIGHTS. AS THE HIGH MOVES TO OUR EAST ON SUNDAY NIGHT. SURFACE ANALYSIS EARLY THIS MORNING SHOWS A GARGANTUAN AREA OF HIGH PRESSURE CENTERED OVER IOWA AND MINNESOTA. THE HIGH PRESSURE SYSTEM WAS INFLUENCING THE WEATHER FROM THE EAST COAST. REMEMBER YESTERDAY? OTHER THAN BEING ABOUT 10 DEGREES COOLER. ALONG WITH THE LEE SIDE OF THE UPPER RIDGE OVER THE ROCKIES.
536 AM EDT SAT OCT 17 2015 A DEEP UPPER LEVEL TROUGH OVER EASTERN CANADA AND THE NORTHEAST CONUS WILL BRING BELOW NORMAL TEMPERATURES TO CENTRAL PA THIS WEEKEND. WIDESPREAD NIGHTTIME FREEZING CONDITIONS WILL LIKELY END TO THE GROWING SEASON. HOWEVER THE PLACEMENT IS SLIGHTLY SW OF THE LOWER RES MODEL CONSENSUS. EITHER WAY THE HIGHEST POPS WILL BE FOCUSED OVER THE NW MTNS IN CLOSE PROXIMITY/DOWNWIND OF LAKE ERIE. A LIGHT NW FLOW GRADIENT AND STRATOCU CLOUDS WILL TRY TO PROP UP TEMPS AND LATEST BLENDS ACTUALLY CAME IN A LITTLE WARMER THAN PREVIOUS FCST. THE 850MB THERMAL TROUGH /-4C TO -8C/ WILL MOVE THROUGH ON SUNDAY WITH ONE MORE DAY OF SEASONABLY COLD.
BY LATE TONIGHT EFFECTS FROM ENCROACHING LARGE HIGH PRESSURE CENTER WL BEGIN WITH INCREASING WINDS ALONG THE NORTH COAST BY DAYBREAK SUNDAY. WINDS WILL BEGIN TO INCREASE OVER THE NORTH LATE TONIGHT AS THE INITIAL EFFECTS FROM ENCROACHING STRONG HIGH PRESSURE BEGIN TO INCREASE WINDS OVER NORTH FL. STRONG RIDGE AXIS WILL BUILD FROM THE MIDWEST TO THE ATLC COAST. RIDGE AXIS WILL STALL OVER THE MID ATLC COAST AND SLOWLY WEAKEN THRU MIDWEEK.
424 AM MST THU FEB 25 2016 TODAY THROUGH FRIDAY HIGH PRESSURE WILL REMAIN OVER THE WESTERN HALF OF THE U. WITH BROAD LOW PRESSURE OVER THE EASTERN HALF OF THE COUNTRY. THIS MORNING THE MAIN 500 MB RIDGELINE WILL EXTEND FROM SOUTHERN CALIFORNIA UP THE WEST COAST TO BRITISH COLUMBIA AND ALASKA. THE RIDGE WILL MOVE STEADILY EAST THROUGHOUT THE DAY AND TONIGHT. BY FRIDAY MORNING THE RIDGELINE WILL BE OVER THE WESTERN GREAT BASIN AND IT SHOULD REACH EASTERN UT BY LATE FRI AFTERNOON. NIGHTTIME TEMPERATURES IN THE HIGHER VALLEYS WILL REMAIN QUITE COLD.
840 AM MST THU FEB 25 2016 HIGH PRESSURE WILL REMAIN THE PREDOMINANT WEATHER FEATURE THROUGH THE WEEKEND. MORNING ANALYSIS DEPICTS THE WEST COAST RIDGE AXIS SLOWLY TRANSLATING INLAND THIS MORNING WITH 12Z REGIONAL SOUNDING ANALYSIS SAMPLING WIDESPREAD H5 HEIGHTS NEAR 580DM.
712 AM EST THU FEB 25 2016 STRONG LOW PRESSURE WILL TRACK NORTHEAST ACROSS NORTHERN NEW ENGLAND TODAY.