Aikyam-Lab/Synoptic-Bench huggingface dataset:
HIGH PRESSURE ALOFT IS GIVING US PLENTY OF SUNSHINE. THIS HIGH PRESSURE IS EXPECTED TO CONTINUE THE REST OF THE WEEK BUT WILL BREAK DOWN OVER THE WEEKEND ALLOWING FOR CLOUDS AND FINALLY A CHANCE AT SOME MUCH NEEDED RAINS.
144 AM EDT WED SEP 23 2015 HIGH PRESSURE WILL BRING DRY CONDITIONS WITH ABOVE AVERAGE TEMPERATURES THROUGH LATE WEEK. ANOTHER SUNNY DAY IS EXPECTED TOMORROW WITH MAX TEMPERATURES SEVERAL DEGREES WARMER THAN OBSERVED TODAY AS HIGH PRESSURE CONTINUES TO BUILD IN ACROSS THE REGION.
251 AM CDT WED SEP 23 2015 SKIES ARE MOSTLY CLEAR ACROSS THE FORECAST AREA EARLY THIS MORNING WITH TEMPERATURES RANGING FROM THE LOWER 50S TO MID 60S. HIGH PRESSURE IS CENTERED OVER THE NORTHEAST U. THIS HIGH WILL STAY PRETTY MUCH OVER THE SAME AREA FOR THE NEXT COUPLE OF DAYS.
AN OFFSHORE LOW PRESSURE SYSTEM WILL RETROGRADE INLAND INTO THE SOUTHEASTERN US THROUGH THE END OF THE WEEK. DEPENDING ON THE STRENGTH AND EXACT TRACK/LOCATION OF THE LOW PRESSURE AREA INTO THE SOUTHEAST. DEEP FETCH OF ATLANTIC MOISTURE BETWEEN THE STRENGTHENING CANADIAN HIGH PRESSURE BUILDING EASTWARD INTO THE EASTERN US AND OFFSHORE LOW PRESSURE SYSTEM RETROGRADING INLAND INTO THE SOUTHEASTERN US WILL RESULT IN STRONG MOISTURE FLUX CONVERGENCE AS PWATS INCREASE TO 1. HIGHS GENERALLY IN THE LOWER 70S. POSSIBLY COOLER IF THE WETTER/FASTER EC VERIFIES.
SLIGHT COOLING SPREADS OVER SE OREGON AND SW IDAHO TO BRING HIGHS DOWN SLIGHTLY COOLER /1-4F/ TODAY.
150 AM EDT WED SEP 23 2015 HIGH PRESSURE OVER NEW ENGLAND WILL WEAKEN. A LARGER AREA OF HIGH PRESSURE OVER EASTERN CANADA WILL BUILD LATE WEEK AND SPREAD SOUTHEAST. THE LOW TEMPERATURE FORECAST IS ESSENTIALLY LAST NIGHTS MINS PLUS A COUPLE OF DEGREES. HIGH PRESSURE AT THE SURFACE AND ALOFT WILL REMAIN IN CONTROL. HIGHS A DEGREE OR SO WARMER THAN TODAY.
THE UPPER LEVEL LOW SWINGING OUT INTO THE CENTRAL PLAINS EARLY THIS MORNING WILL SPLIT WITH A SECOND LOBE SWINGING SOUTH TOWARDS THE TEXAS PANHANDLE.
MODELS IN GOOD AGREEMENT WITH A STRONG VORT LOBE LIFTING NORTH OUT OF NEW MEXICO AND CLOSING OFF INTO AN UPPER LOW OVER NORTHEAST COLORADO BY WEDNESDAY MORNING. THE UPPER LEVEL LOW OVER NORTHEAST COLORADO WILL LIFT INTO THE NORTHERN PLAINS WHILE THE FOUR CORNERS ENERGY MOVES NORTHEAST ACROSS COLORADO BY THE AFTERNOON HOURS. TEMPERATURES ARE FORECAST TO REMAIN WARM WITH 80S ACROSS THE LOWER ELEVATIONS. MOZLEY WED NIGHT AN UPR TROF WL BE EXITING THE STATE TO THE SOUTH AND EAST. FOR THU THRU SAT AN UPR RIDGE WL BE OVR THE FORECAST AREA AND WL GENERALLY KEEP THE WEATHER DRY. SUN THRU TUE THE ECMWF HAS A LARGE UPR RIDGE CENTERED OVER CO. THE GFS ON THE OTHER HAND DOES NOT SHOW THAT RIDGE.
410 AM EDT WED SEP 23 2015 PLEASANT EARLY FALL WEATHER IS EXPECTED THROUGH THE END OF THE WEEK AS HIGH PRESSURE BUILDS OVER THE STATE. A DRY COLD FRONT WILL PUSH THROUGH THE AREA LATE TODAY BRINGING DRY COOL AIR. HIGH PRESSURE WILL PREVAIL ONCE AGAIN, KEEPING SKIES MOSTLY SUNNY AT LEAST PART OF THE DAY. A WEAK COLD FRONT WILL APPROACH FROM QUEBEC THIS AFTERNOON AND CROSS THE STATE THIS EVENING. HIGH PRESSURE DOMINATES THROUGH THE PERIOD WITH SUNNY SKIES AND LOW HUMIDITY.
402 AM EDT WED SEP 23 2015 DRY, RELATIVELY MILD WEATHER, IS EXPECTED TO CONTINUE THROUGH THIS WEEKEND, AS A LARGE HIGH PRESSURE SYSTEM REMAINS IN CONTROL. MAX TEMPS WILL RANGE FROM THE LOWER TO MIDDLE 70S. A GREAT STRETCH OF EARLY FALL WEATHER IS EXPECTED THROUGH THE PERIOD AS A FLAT UPPER LEVEL RIDGE WILL REMAIN OVER THE EASTERN UNITED STATES.
408 AM CDT WED SEP 23 2015 RIDGING ALOFT AND AT THE SFC WILL KEEP BENIGN CONDITIONS IN PLACE TODAY. CONDITIONS SHOULD BE VERY SIMILAR TO THE LAST COUPLE OF DAYS WITH MOSTLY CLEAR TO PARTLY CLOUDY SKIES AND DAYTIME HIGH TEMPS WARMING INTO THE LOW TO MID 90S. AS THE UPPER RIDGE RETROGRADES SW. A SECOND UPPER LOW WILL SLOWLY MOVE NORTH FROM THE NE GULF OF MEXICO INTO THE SERN CONUS.
A WEAK LOW PRESSURE CIRCULATION IS WELL-DEFINED ON SATELLITE TODAY ON THE NORTHERN FRINGE OF A 65KT JET STREAK IN NORTHERN NEW MEXICO. THE REMNANTS OF THE TROUGH WILL CONTINUE SLIDING EAST THROUGHOUT THE DAY AND DRAG ITS MOISTURE WITH IT. PRECIP WILL END ABOUT MIDNIGHT THEN HIGH PRESSURE WILL BUILD OVER THE GREAT BASIN AND WESTERN CO OVERNIGHT. A STRONG RIDGE WILL DOMINATE THE FOUR CORNERS STATES THU THROUGH NEXT TUE. DRIER AND WARMER CONDITIONS WILL PREVAIL. WITH ONLY THE SLIGHTEST CHANCE OF LATE AFTERNOON SHOWERS OVER THE HIGHER PEAKS OF THE SAN JUAN MOUNTAINS THU AND FRI.
358 AM CDT WED SEP 23 2015 Upper level ridging is impacting most of the country with an upper trough over New Mexico and Colorado. This upper trough will allow for showers and storms to develop today across southeast New Mexico, the northwest Permian Basin, and the Upper Trans Pecos southward to the Rio Grande.
546 AM EDT WED SEP 23 2015 HIGH PRESSURE TO THE NORTH OF THE STATE WILL DOMINATE THE WEATHER RIGHT INTO THE WEEKEND.
A few sheltered valleys in north Idaho and northeast Washington will likely dip below freezing. Mostly clear skies under a ridge of high pressure will allow for optimal radiational cooling tonight, especially for the sheltered northern valleys. Light northerly winds will allow temperatures to dip below the freezing mark.
OVERVIEW: LARGE SCALE LOW AMPLITUDE RIDGING ENCOMPASSES MUCH OF THE CONUS THIS MORNING. DOWNSTREAM FROM A FAIRLY SUBSTANTIAL TROUGH IN THE GULF OF ALASKA INTO THE PACIFIC NORTHWEST. GREAT LAKES/OHIO VALLEY REGION STILL FINDING ITSELF STILL WITHIN THE DOMAIN OF BROAD HIGH PRESSURE BUT WITH AN ILL- DEFINED FRONT FOLDING DOWN INTO NRN MICHIGAN. ANOTHER DAY WITH TEMPS LARGELY IN THE 70S ALTHOUGH CLOUDS (AND SUBTLE COOLER AIR BLEEDING INTO FROM THE NORTH) MAY KNOCK READINGS DOWN A FEW DEGREES COMPARED TO YESTERDAY.
2) ALONG THE NEBRASKA/IA BORDER N OF A WEAK WARM FRONT THAT IS DRAPED FROM ALONG THE KS/NEBRASKA BORDER TO NORTHERN MO. DEEP HIGH PRESSURE COVERING MOST OF THE EASTERN HALF OF THE U. RAIN SHOULD REACH AREAS WEST OF K-14 ~5AM BUT WITH THE LOWEST ~10,000FT OF AIRMASS STILL QUITE DRY VERY LITTLE.
338 AM EDT WED SEP 23 2015 HIGH PRESSURE OVER NEW ENGLAND WILL WEAKEN AND BE REPLACED BY A LARGER AREA OF HIGH PRESSURE OVER CANADA. HIGH PRESSURE WILL CONTINUE TO DOMINATE AT THE SURFACE AND ALOFT INTO THE WEEKEND.
UPPER AIR PATTERN CONSISTS OF A 500 MB RIDGE OVER THE SOUTHERN PLAINS WITH A BROAD TROUGH ON THE WEST COAST AND A DEEP TROUGH OVER THE ERN U. THE UPPER FLOW BECOMES MORE ZONAL THIS FORECAST PERIOD OVER THE UPPER GREAT LAKES AS THE RIDGE TRIES TO BUILD NORTH. COLD FRONT IS MOVING THROUGH THE AREA NOW AND BUMPED POPS TO SCATTERED AS SHOWERS HAVE TAKEN OFF ACROSS EASTERN MARQUETTE COUNTY AND THEN HAVE POPS GO TO SLIGHT CHANCE THIS AFTERNOON AS THE FRONT EXITS THE CWA AND STALLS SOUTH OF HERE. WEDNESDAY NIGHT WILL SEE CONTINUED WAA/INVERTED TROUGH SHOWER ACTIVITY OVER THE NW. THE 500MB TROUGH OVER THE SW U. WITH A WEAK TROUGH SLIDING OVER OUR AREA THURSDAY. THE LARGE HIGH OVER ONTARIO WEDNESDAY NIGHT WILL BUILD IT/S RIDGE ACROSS THE UPPER GREAT LAKES THROUGH THE REST OF THE WEEK.
HIGH PRESSURE BUILDING OVER THE EASTERN GREAT BASIN WILL RESULT IN GENERALLY DRY AND UNSEASONABLY WARM CONDITIONS THROUGH THE UPCOMING WEEKEND.
HIGH PRESSURE WILL CONTINUE TO ALLOW FOR DRY AND WARM WEATHER THROUGH THE UPCOMING WEEKEND WITH PLENTY OF SUNSHINE EACH DAY. WITH RIDGING BUILDING INTO THE AREA. WITH UPPER 60S TO LOW 70S FOR THE HIGHER ELEVATIONS. A WEAK COLD FRONT WILL BE PASSING ACROSS THE REGION FOR TONIGHT INTO THURSDAY. BEHIND THE WEAKENING COLD FRONT.
357 AM EDT WED SEP 23 2015 A LARGE AREA OF HIGH PRESSURE OVER THE NORTHEAST WILL BE THE MAIN WEATHER FEATURE ACROSS THE NORTHEAST THROUGH THE WEEKEND. WEAK UPPER TROUGH HAS MOVED SOUTH AND EAST OF THE AREA WITH CLEAR SKIES AND LIGHT SOUTH SURFACE WINDS. THE 500 MB RIDGE AMPLIFIES IN THE WESTERN US WITH CORRESPONDING LOWERING HEIGHTS IN THE EASTERN US AND THE REGION UNDER AN AREA OF NORTHWEST FLOW.
206 AM EDT WED SEP 23 2015 DRY, RELATIVELY MILD WEATHER, IS EXPECTED TO CONTINUE THROUGH THIS WEEKEND, AS A LARGE HIGH PRESSURE SYSTEM REMAINS IN CONTROL. DRY WEATHER IS VERY LIKELY TO CONTINUE THIS PERIOD, AS A WEAK UPPER-LEVEL TROUGH AXIS FILLS/DISSIPATES, AND UPPER RIDGING RE- ESTABLISHES CONTROL OVER THE EASTERN STATES.
DETERMINISTIC GFS/NAM/ECWMF PREDICT THAT THE UPPER RIDGE WL PERSIST OVER THE REGION TONIGHT/WEDNESDAY ALONG WITH WEAK SUBSIDENCE/SIGNIFICANT DRYING. ANTICIPATE AT LEAST PATCHY FOG FOR WEDNESDAY NIGHT (09-12Z THURSDAY) AS A COMPROMISE BETWEEN GREATER UPPER LEVEL CLOUD COVER AND CONDITIONS IN THE LOWER/MID LEVELS CONSISTENT WITH RADIATIONAL FOG (NAM DETERMINISTIC SOUNDINGS.
600 AM CDT WED SEP 23 2015 LATEST WATER VAPOR SATELLITE IMAGERY SHOWING UPPER LEVEL TROUGH/LOW OVER THE FOUR CORNERS AREA WITH SEVERAL IMPULSES ROTATING AROUND THE TROUGH INTO THE CENTRAL AND HIGH PLAINS. 00Z GFS/NAM/ECMWF ARE IN BETTER AGREEMENT IN SLOWLY PUSHING UPPER LEVEL/TROUGH AND ASSOCIATED MOISTURE AXIS/LIFT SOUTH AND WEST OF THE FORECAST AREA TODAY INTO TONIGHT. 00Z MODELS CONTINUE TO SUGGEST THE FAR WESTERN AREA REMAINS ON THE EASTERN PERIPHERY OF THE 925-850MB MOISTURE TRANSPORT/CONVERGENCE/AXIS AND ASSOCIATED LIFT WITH FIRST PIECE OF ENERGY EJECTING OUT OF THE UPPER LEVEL TROUGH INTO WESTERN MINNESOTA/EASTERN DAKOTAS TODAY AND INTO TONIGHT.
234 AM EDT WED SEP 23 2015 A LARGE AREA OF HIGH PRESSURE DESCENDING ONTO THE NORTH COUNTRY TONIGHT WILL BE THE DOMINANT WEATHER FEATURE ACROSS THE NORTHEAST THROUGH THIS WEEKEND. AREAS OVER LAKE CHAMPLAIN RUNNING A BIT WARMER THAN FORECAST. OTHERWISE FORECAST TRACKING ALONG WELL WITH HIGH PRESSURE AT THE SURFACE FOR LIGHT OR CALM WINDS, AND CLEAR SKIES AND GOOD RADIATIONAL COOLING.
UPPER LOW BRINGS MOUNTAIN MOISTURE THIS WEEKEND. DRIER AIR WORKING IN WITH THE HIGH PRESSURE WILL CONTINUE TO ERODE THE LOW CLOUDS ALONG THE EASTERN SLOPES OF THE MOUNTAINS THIS MORNING. HIGH PRESSURE OVERHEAD WITH CLEAR SKIES AND CALM WINDS WILL AGAIN LEAD TO RIVER VALLEY FOG LATER TONIGHT. THE WEAKNESS IN THE MID AND UPPER LEVEL FIELDS CREATING THIS PATTERN WILL HOLD THROUGH THE WEEKEND WHEN THE DOMINANT LONGWAVE UPPER RIDGE OVER THE CENTRAL CONUS FINALLY BEGINS TO BREAK DOWN. UNTIL A COLD FRONT. HIGH PRESSURE BUILDING OVER THE AREA FROM THE NORTHEAST WILL BRING IN DRIER AIR.
IT COULD CERTAINLY END UP BEING COOLER THAN CURRENT FORECAST NUMBERS OVER SCENTRAL SD.
128 AM EDT WED SEP 23 2015 A LARGE AREA OF HIGH PRESSURE DESCENDING ONTO THE NORTH COUNTRY TONIGHT WILL BE THE DOMINANT WEATHER FEATURE ACROSS THE NORTHEAST THROUGH THIS WEEKEND. AREAS OVER LAKE CHAMPLAIN RUNNING A BIT WARMER THAN FORECAST. OTHERWISE FORECAST TRACKING ALONG WELL WITH HIGH PRESSURE AT THE SURFACE FOR LIGHT OR CALM WINDS, AND CLEAR SKIES AND GOOD RADIATIONAL COOLING.
A BROAD TROUGH WILL CONTINUE TO EVOLVE OFFSHORE OVER THE NEXT COUPLE OF DAYS.
342 AM PDT WED SEP 23 2015 Milder temperatures continue across the region today, then warmer conditions return Thursday and continue into the weekend. Temperatures are considerably cooler than 24 hours ago (5-15 degrees lower) across the Central Valley and surrounding terrain and generally range from the 40s in the mountain valleys to the 50s and lower 60s elsewhere.
615 AM EDT WED SEP 23 2015 AN AREA OF HIGH PRESSURE WILL REMAIN IN PLACE THROUGH THE WEEK. 75" AND WITH SURFACE RIDGING IN PLACE NO RAIN IS EXPECTED.
AS HIGH PRESSURE WILL REMAIN IN CONTROL. LOWS WILL RANGE FROM THE THE LOW 50S NEAR THE LAKE SHORES TO MID 40S INLAND. OUR WEEK OF WARM AND DRY WEATHER CONTINUES WEDNESDAY AS HIGH PRESSURE BUILDS SOUTH FROM CENTRAL CANADA ACROSS THE GREAT LAKES. OTHERWISE A WEAK AND DRY BACK DOOR COLD FRONT WILL DROP SOUTH ACROSS LAKE ONTARIO TO THE SOUTHERN LAKE SHORELINE THROUGH THE DAY. TEMPERATURES SHOULD WARM A TOUCH HIGHER THAN TODAY WITH HIGHS RANGING IN THE LOW TO MID 70S WITH A FEW UPPER 70S POSSIBLE ACROSS THE GENESEE RIVER VALLEY. A BROAD AREA OF HIGH PRESSURE ACROSS ONTARIO AND QUEBEC WILL RIDGE ACROSS OUR AREA THROUGHOUT THE PERIOD.
TEMPS WILL ONCE AGAIN REACH TO THE LOWER 80'S ACROSS MUCH OF THE AREA UNDERNEATH MOSTLY SUNNY SKIES.
300 AM EDT WED SEP 23 2015 AN AREA OF HIGH PRESSURE WILL REMAIN IN PLACE THROUGH THE WEEK. 75" AND WITH SURFACE RIDGING IN PLACE NO RAIN IS EXPECTED.
HIGH PRESSURE OVER THE NORTHEAST U. WILL CONTINUE TO RIDGE SOUTHWESTWARD WITH A WEAK AREA OF LOW PRESSURE OFF THE SOUTHEAST U. ON THURSDAY THE DEEP MOISTURE WILL BECOME FIRMLY ESTABLISHED AS LOW LEVEL TROUGHING STRETCHES ACROSS THE REGION FROM JUST OFF THE SOUTHEAST U.
224 AM EDT WED SEP 23 2015 A DRY AREA OF HIGH PRESSURE WILL REMAIN IN PLACE THROUGH THE WEEK. THE INFLUENCE FROM THIS HIGH WILL REACH ALL THE WAY SOUTH INTO THE TENNESSEE VALLEY. WITH NO CHANGE TO THE GENERAL UPPER RIDGING PATTERN OVER THE EASTERN HALF OF THE CONUS.
128 AM EDT WED SEP 23 2015 HIGH PRESSURE WILL DOMINATE THE WEATHER RIGHT INTO THE WEEKEND. NIGHT TIME BLENDED IMAGERY SHOWS THE LOW CLOUDS HAVE DISIPATED AND WE ARE LEFT WITH CLEAR SKIES AND VIRTUALLY NO WIND. WITH HIGH PRESSURE IN CONTROL THE REGION WILL HAVE A SUNNY DAY IN STORE.
EXPECT THE LOW CLOUD TO DIMINISH IN COVERAGE WITH HEATING AND MIXING LATER THIS MORNING.
TODAY AND TONIGHT HIGH PRESSURE RESIDING OVER THE GREAT LAKES FOR THE LAST FEW DAYS WILL BE REINFORCED BY A RIDGE BUILDING IN FROM CENTRAL CANADA TODAY. THE TWO FEATURES WILL MERGE AS A WEAK COLD FRONT WASHES OUT NEAR THE STRAITS/FAR NORTHERN LOWER MICHIGAN. THE SURFACE PRESSURE GRADIENT WILL INCREASE SLIGHTLY TONIGHT DUE TO A COMBINATION OF DIURNAL PRESSURE RISE OVER LOWER MICHIGAN DURING THE EVENING AND CONTINUED BUILDING OF THE LARGE SCALE HIGH PRESSURE CENTER OVER NORTHERN ONTARIO OVERNIGHT. THIS IS EXPECTED TO KEEP MIN TEMPS IN THE LOWER 50S EXCEPT FOR POSSIBLY SOME UPPER 40S IN THE TYPICALLY COOL SPOTS INTERIOR THUMB.
UPPER LOW BRINGS MOUNTAIN MOISTURE THIS WEEKEND. UNTIL A COLD FRONT. HIGH PRESSURE BUILDING OVER THE AREA FROM THE NORTHEAST WILL BRING IN DRIER AIR WITH TIME. GIVEN THE MORE NORTHERLY COMPONENT TO THE LOW LEVEL FLOW. WITH CLEAR SKIES AND NEAR CALM WINDS UNDER THE HIGH PRESSURE.
637 AM EDT WED SEP 23 2015 DRY, RELATIVELY MILD WEATHER, IS EXPECTED TO CONTINUE THROUGH THIS WEEKEND, AS A LARGE HIGH PRESSURE SYSTEM REMAINS IN CONTROL. MAX TEMPS WILL RANGE FROM THE LOWER TO MIDDLE 70S. A GREAT STRETCH OF EARLY FALL WEATHER IS EXPECTED THROUGH THE PERIOD AS A FLAT UPPER LEVEL RIDGE WILL REMAIN OVER THE EASTERN UNITED STATES.
352 AM CDT WED SEP 23 2015 (Today and Tonight) Upper level ridging will continue to suppress rainfall today and tonight. High temperatures will likely fall a degree or two, as the 850 MB thermal ridge pushes slowly west. It will also be cooler tonight with lighter winds and drier air. Surface dew points will be in the 50s tonight, with lows falling into the lower and mid 60s.
310 AM CDT WED SEP 23 2015 LATEST WATER VAPOR SATELLITE IMAGERY SHOWING UPPER LEVEL TROUGH/LOW OVER THE FOUR CORNERS AREA WITH SEVERAL IMPULSES ROTATING AROUND THE TROUGH INTO THE CENTRAL AND HIGH PLAINS. 00Z GFS/NAM/ECMWF ARE IN BETTER AGREEMENT IN SLOWLY PUSHING UPPER LEVEL/TROUGH AND ASSOCIATED MOISTURE AXIS/LIFT SOUTH AND WEST OF THE FORECAST AREA TODAY INTO TONIGHT. 00Z MODELS CONTINUE TO SUGGEST THE FAR WESTERN AREA REMAINS ON THE EASTERN PERIPHERY OF THE 925-850MB MOISTURE TRANSPORT/CONVERGENCE/AXIS AND ASSOCIATED LIFT WITH FIRST PIECE OF ENERGY EJECTING OUT OF THE UPPER LEVEL TROUGH INTO WESTERN MINNESOTA/EASTERN DAKOTAS TODAY AND INTO TONIGHT.
RAIN CHANCES INCREASE THURSDAY AS LOW PRESSURE MOVES ONSHORE. UPPER LOW WILL REMAIN OVER THE NORTHEASTERN GULF TODAY PROMOTING SOUTH-SOUTHEASTERLY FLOW ALOFT. HIGH TEMPERATURES ARE FORECAST IN THE LOWER 80S. COOLER AIR IN A NORTHEAST SURFACE FLOW WILL BRING SLIGHTLY BELOW NORMAL TEMPERATURES. LOW PRESSURE WILL REMAIN OFF THE SOUTHEAST COAST THROUGH MOST OF THE PERIOD WITH A LONG-FETCH ONSHORE FLOW.
SOUTHWESTERLY FLOW ALOFT OVER WESTERN WASHINGTON WITH AN UPPER LEVEL TROUGH WELL OFFSHORE AND AN UPPER LEVEL RIDGE WELL TO THE EAST.
Amplified upper ridging will extend through the Plains with any rain chances expected to remain north and west of the area. Lower dewpoints are currently spreading into SE OK and this drier air will push westward as sfc ridging strengthens to our east and northeast.
352 AM EDT WED SEP 23 2015 A LARGE AREA OF HIGH PRESSURE DESCENDING ONTO THE NORTH COUNTRY TONIGHT WILL BE THE DOMINANT WEATHER FEATURE ACROSS THE NORTHEAST THROUGH THIS WEEKEND. AREAS OVER LAKE CHAMPLAIN RUNNING A BIT WARMER THAN FORECAST. OTHERWISE FORECAST TRACKING ALONG WELL WITH HIGH PRESSURE AT THE SURFACE FOR LIGHT OR CALM WINDS, AND CLEAR SKIES AND GOOD RADIATIONAL COOLING.
615 AM EDT WED SEP 23 2015 PLEASANT EARLY FALL WEATHER IS EXPECTED THROUGH THE END OF THE WEEK AS HIGH PRESSURE BUILDS OVER THE STATE. A DRY COLD FRONT WILL PUSH THROUGH THE AREA LATE TODAY BRINGING DRY COOL AIR. HIGH PRESSURE WILL PREVAIL ONCE AGAIN, KEEPING SKIES MOSTLY SUNNY AT LEAST PART OF THE DAY. A WEAK COLD FRONT WILL APPROACH FROM QUEBEC THIS AFTERNOON AND CROSS THE STATE THIS EVENING. HIGH PRESSURE DOMINATES THROUGH THE PERIOD WITH SUNNY SKIES AND LOW HUMIDITY.
AN OFFSHORE LOW PRESSURE SYSTEM WILL RETROGRADE INLAND INTO THE SOUTHEASTERN US THROUGH THE END OF THE WEEK. EXPECT DRY CONDITIONS TO PREVAIL OVERNIGHT IN ASSOC/W LOW-LEVEL COLD ADVECTION BETWEEN HIGH PRESSURE NOSING INTO THE REGION FROM THE NORTH/WEST AND LOW PRESSURE OFFSHORE THE SOUTHEAST COAST. -VINCENT THE LOW OFFSHORE WILL DRIFT SOUTHWESTWARD ON WEDNESDAY AS THE PRESSURE GRADIENT BETWEEN THE LOW AND 1030MB CANADIAN HIGH STRENGTHENS ACROSS CENTRAL NC. THE CHANCES FOR PRECIP STILL LOOK LIMITED DURING THE DAY AND WILL INCREASE OVERNIGHT WHEN THE LOW-LEVEL FLOW BEGINS TO VEER AROUND TO MORE EASTERLY AND ONSHORE BENEATH INCREASINGLY DIFFLUENT FLOW ALOFT.
A DOME OF HIGH PRESSURE WILL IN CONTROL. THE SYNOPTIC PATTERN FEATURES A POSITIVE TILT LONG WAVE H5 RIDGE OVER THE CENTRAL PART OF THE US AND A NEUTRAL TILT LONG WAVE TROF OVER THE GULF OF AK. BASICALLY THIS CONTINENTAL TROPIC AIRMASS HOLDS IN PLACE THROUGH THE SHORT TERM WITH A GRADUALLY INCREASE IN H5 HEIGHTS AS THE RIDGE TO THE EAST BUILDS IN RESPONSE TO THE LONG WAVE TROF OVER THE GULF OF AK BECOMING MORE NEGATIVELY TILTED. A WEAK UPPER LEVEL DISTURBANCE SITUATED NEAR 140W 30N WITH A TROPICAL CONNECTION IS PROGGED TO GET PULLED INTO THE SOUTHWESTERLY FLOW ALOFT BY THE LONG WAVE TROF.
1222 AM CDT WED SEP 23 2015 THE MAIN UPPER LEVEL RIDGE AXIS EXTENDING THROUGH PORTIONS OF THE CENTRAL/SRN PLAINS CONTINUES TO GRADUALLY SHIFT OFF TO THE EAST. WHILE LOW PRESSURE SPINS OVER THE FOUR CORNERS REGION. LOW PRESSURE SITS OVER PORTIONS OF EAST CENTRAL/NERN COLORADO. WITH A WARM FRONT EXTENDING E/NE THROUGH NRN PORTIONS OF THE CWA. WITH THE MAIN MID/UPPER LEVEL TROUGH AXIS ONLY HAVING MADE IT INTO WRN PORTIONS OF THE CWA. WITH THE HIGHER POPS MAINLY OVER OUR SC NEB COUNTIES. MODELS ARE IN PRETTY GOOD AGREEMENT SHOWING DEEPER LAYER SHEAR BEING ON THE LOWER SIDE. NOW IN THE FORM OF A VERY MOIST UPPER LEVEL LOW. SHOWERS AND THUNDERSTORM CHANCES WILL BE THE HIGHEST WEDNESDAY NIGHT AND THEN GRADUALLY DECREASE AS THE UPPER SYSTEM WEAKENS THURSDAY INTO THURSDAY NIGHT.
UPPER LOW BRINGS MOUNTAIN MOISTURE THIS WEEKEND. DRIER AIR WORKING IN WITH THE HIGH PRESSURE WILL CONTINUE TO ERODE THE LOW CLOUDS ALONG THE EASTERN SLOPES OF THE MOUNTAINS THIS MORNING. HIGH PRESSURE OVERHEAD WITH CLEAR SKIES AND CALM WINDS WILL AGAIN LEAD TO RIVER VALLEY FOG LATER TONIGHT. THE WEAKNESS IN THE MID AND UPPER LEVEL FIELDS CREATING THIS PATTERN WILL HOLD THROUGH THE WEEKEND WHEN THE DOMINANT LONGWAVE UPPER RIDGE OVER THE CENTRAL CONUS FINALLY BEGINS TO BREAK DOWN. UNTIL A COLD FRONT. HIGH PRESSURE BUILDING OVER THE AREA FROM THE NORTHEAST WILL BRING IN DRIER AIR WITH TIME. GIVEN THE MORE NORTHERLY COMPONENT TO THE LOW LEVEL FLOW. WITH CLEAR SKIES AND NEAR CALM WINDS UNDER THE HIGH PRESSURE.
300 AM PDT WED SEP 23 2015 HIGH PRESSURE WILL BUILD OVER THE AREA TODAY THROUGH THE WEEKEND.
1150 PM MDT TUE SEP 22 2015 AVIATION SECTION UPDATED SIMILAR TO THIS TIME LAST NIGHT, A WEAK UPPER-LEVEL TROF STRETCHES SOUTHWEST TO NORTHEAST THROUGH THE NORTHERN PORTION OF THE FORECAST AREA. MOISTURE AND SLIGHT INSTABILITY ALONG AND AHEAD OF THE TROF AXIS ARE PRODUCING SOME BANDS OF LIGHT RAIN SHOWERS WITH LATEST RADAR IMAGERY SHOWING ONE BAND FROM CENTRAL LEWIS & CLARK COUNTY EASTWARD TO THE BLAINE/FERGUS COUNTY LINE AND A SECOND LINE FROM WHITEHALL TO LEWISTOWN.
MID/UPPER-LEVEL CYCLONE IS FORECAST BY SHORT TERM MODEL GUIDANCE TO REMAIN NEARLY STATIONARY ACROSS THE SE ALABAMA/SW GEORGIA/FLORIDA PANHANDLE REGION OVERNIGHT. CEILING HEIGHTS AROUND 10 KFT ACROSS THE NORTHEAST SHOULD BE SUFFICIENT TO LIMIT RADIATIONAL COOLING IN THIS REGION -- AND WE WILL MAINTAIN INHERITED SLIGHTLY WARMER LOW TEMPERATURES IN THE UPPER 50S/LOWER 60S FOR THE EASTERN WITH READINGS EXPECTED TO FALL INTO THE LOWER/MID 50S ELSEWHERE.
459 AM EDT WED SEP 23 2015 HIGH PRESSURE TO THE NORTH OF THE STATE WILL DOMINATE THE WEATHER RIGHT INTO THE WEEKEND.
THE HIGH RESOLUTION MODELS PUSH THE SHOWERS/THUNDERSTORMS NEAR ABERDEEN INTO THE FAR SOUTHERN JAMES RIVER VALLEY BETWEEN 09Z-12Z AND WEAKEN THEIR INTENSITY AT THE SAME TIME.
TONIGHT THROUGH WEDNESDAY RIDGING WILL CONTINUE TO BUILD ACROSS THE INTERMOUNTAIN WEST WITH WELL ABOVE NORMAL TEMPERATURES.
A COLD FRONT IS MOVING OUT OF EASTERN OKLAHOMA AND INTO WESTERN ARKANSAS. THE COLD FRONT WILL BE EAST OF THE FORECAST AREA MONDAY MORNING WITH SHOWERS ENDING OVER FAR EASTERN SECTIONS. COOLER AND DRIER AIR WILL BE MOVING INTO THE REGION WITH HIGHS ON MONDAY IN THE UPPER 60S TO LOWER 70S. HIGH PRESSURE WILL MOVE INTO THE REGION MONDAY NIGHT ALLOWING SKIES TO CLEAR WHICH WILL HELP TEMPERATURES DROP IN TO THE 40S OVER MUCH OF THE FORECAST AREA.
A WEAK LOW PRESSURE SYSTEM WILL MOVE SOUTHWARD OVER THE CALIFORNIA COASTAL WATERS THROUGH MIDWEEK.
THE WET PATTERN WITH ABOVE NORMAL TEMPERATURES CURRENTLY ACROSS CENTRAL INDIANA WILL TRANSITION TO A COOLER DRIER PATTERN UNDER THE INFLUENCE OF A BROAD UPPER LOW THAT WILL STALL OUT OVER EASTERN CANADA BY MID WEEK. AS LOW PRESSURE LIFTS NORTH THROUGH INDIANA IT WILL CONTINUE TO PROVIDE FORCING FOR RAINFALL ACROSS THE AREA THROUGH EARLY TONIGHT. FOR TEMPERATURES WENT ABOVE WARMER MOS NUMBERS /FOR LOWS IN THE 50S/ AND CLOSER TO THE RAW TEMPERATURES WITH CLOUDS AND RAINFALL EXPECTED OVERNIGHT. ANOTHER UPPER WAVE WILL MOVE THROUGH THE MAIN TROUGH BRINGING RAIN TO CENTRAL INDIANA DURING MONDAY MORNING. THE TIGHTENING PRESSURE GRADIENT ACROSS THE AREA WILL ALLOW WINDS TO GUST AT AROUND 25-35 MPH DURING THE AFTERNOON AS THE LOW PULLS FURTHER AWAY.
STRONG UPPER RIDGE OVER THE REGION TONIGHT INTO MONDAY WITH CLEAR SKIES.
A LONG WAVE TROF ASSOCIATED WITH THIS LOW EXTENDED SOUTH TO OKLAHOMA. PIECES OF SHORT WAVE ENERGY LIFTING NWD FROM THE TROF ARE AFFECTING THE FORECAST AREA ATTM AND WILL CONTINUE THROUGH TONIGHT. AS THOSE AFOREMENTIONED PIECES OF ENERGY ROTATE TOWARD THE AREA THEY WILL STAY MAINLY IN THE VCNTY OF AND TO THE EAST OF THE LOW. THE UPPER LOW DRIFTS TO NEAR THE BORDER OF LAKE OF THE WOODS AND CANADA. THE UPPER LOW WAFFLES AROUND NEAR LAKE OF THE WOODS IN THE MORNING. AN UPPER LEVEL LOW WILL REMAIN OVER OR NEAR THE NORTHLAND THROUGH MID WEEK.
THESE STORMS ARE AHEAD OF AN APPROACHING COLD FRONT THAT WILL MOVE ACROSS THE AREA TONIGHT AND SWING WINDS AROUND TO THE NORTHWEST AND NORTH. SKIES WILL CLEAR OUT OVERNIGHT AS A DRIER AIRMASS FILTERS IN BEHIND THE COLD FRONT. /ISSUED 327 PM CDT SUN APR 19 2015/ A PREFRONTAL TROUGH WAS APPROACHING THE CALDWELL AND BRYAN/COLLEGE STATION AT 3 PM. AFTER THE COLD FRONT MOVES THROUGH.
737 PM EDT SUN APR 19 2015 A COLD FRONT WILL APPROACH THE AREA MONDAY.
LOW PRESSURE RESIDES ACROSS IOWA AND MINNESOTA WITH HIGH PRESSURE BUILDING INTO MONTANA.
1144 PM CDT SUN APR 19 2015 CLOSED LOW NORTH OF WINNIPEG WITH TROUGH INTO OKLAHOMA. RIDGE OVER WEST COAST WITH CLOSED LOW OFF CALIFORNIA COAST. RIDGE OVER THE EAST COAST INTO EASTERN CANADA. COLD AIR ALOFT CONTINUES IN THE WAKE OF A STRONG SLOW MOVING LOW PRESSURE SYSTEM WHICH BROUGHT WIDESPREAD MUCH NEEDED RAINFALL TO THE REGION. RIVER VALLEYS AND TYPICAL COLD SPOTS WILL DROP TO NEAR OR SLIGHTLY BELOW FREEZING. STRONG CLOSED LOW OVER WINNIPEG WILL DRIFT SLOWLY EAST THROUGH THE GREAT LAKES THROUGH MID WEEK WITH 250MB JET ON THE WESTERN PERIPHERY BRINGING COLD AIR INTO THE NORTHERN PLAINS. MAINLY ZONAL SOUTHERN STREAM JET WILL DRAW CLOSED LOW OFF CALIFORNIA COAST ACROSS THE DESERT SOUTHWEST.