Aikyam-Lab/Synoptic-Bench huggingface dataset:
A STRONG UPPER LEVEL LOW WAS DRIFTING SOUTHEAST ALONG THE COAST OF BRITISH COLUMBIA THIS MORNING. AND IT WILL BRING MUCH COOLER AND WETTER WEATHER TO THE REGION IN THE SHORT TERM. AS THE AXIS OF THE UPPER LOW ENTERS SE OREGON TONIGHT. A MUCH MORE SIGNIFICANT COLD FRONT WILL MOVE THROUGH. THE TROUGH WILL MOVE THROUGH MONDAY. THE WEST-CENTRAL MTNS WILL SEE SNOW IN THE HIGHEST ELEVATIONS.
1239 AM CDT SUN JUL 26 2015 A WEAK RIDGE OF HIGH PRESSURE WILL REMAIN OVER THE AREA THROUGH TOMORROW. WITH SOME EVEN WEAKER TROUGH AXES TO SERVE AS THE INITIATOR FOR AFTERNOON SHOWERS AND THUNDERSTORMS. THERE IS A WARM FRONT EXTENDING FROM EASTERN NORTH DAKOTA. TONIGHT THE INCREASING LOW LEVEL MOISTURE AND CLOUD COVER SHOULD KEEP MIN TEMPS WARMER THAN THEY WERE LAST NIGHT. THIS WILL ALSO GIVE US A BIT OF A BOOST FOR SUNDAY WHICH SHOULD BE WARMER THAN TODAY WITH CONTINUED WARM AIR ADVECTION ALOFT AND PLENTY OF SUNSHINE TO BOOST US INTO THE MID AND UPPER 80S.
HIGH PRESSURE WILL RIDGE INTO THE FORECAST AREA FROM THE NORTH OVERNIGHT. UPPER HIGH WILL REMAIN CENTERED TO OUR WEST WITH UPPER TROUGH AND STALLED FRONT TO OUR SOUTH. UPPER HIGH WILL REMAIN CENTERED TO OUR WEST WITH WEAK UPPER TROUGHINESS TO OUR EAST AND SOUTH. MODELS INDICATE UPPER HIGH CENTER TO SHIFT WEST TO THE FOUR CORNERS REGION. WITH DEEPENING UPPER TROUGH OVER THE E CONUS. SOME DIFFERENCES BETWEEN GFS AND ECMWF REGARDING WHETHER UPPER TROUGH WILL CUT OFF NEAR THE SE CONUS. COMBINATION OF UPPER TROUGH. DRY HIGH PRESSURE IS IN PLACE ACROSS THE REGION WITH LOW PRECIPITABLE WATER VALUES AND NO CHANCE FOR PRECIPITATION THROUGH THE PERIOD.
AN UPPER LEVEL TROUGH WILL BRING KEEP SHOWERS OVER WESTERN WASHINGTON THROUGH TONIGHT WITH A CHANCE OF THUNDERSTORMS THIS AFTERNOON AND EVENING. SHOWERS WILL DIMINISH LATE TONIGHT INTO EARLY MONDAY MORNING AS THE UPPER LEVEL TROUGH SHIFTS EAST OF THE CASCADES.
630 AM EDT SUN JUL 26 2015 A WEAK COLD FRONT IN THE AREA WILL MOVE SOUTH EARLY TODAY AS HIGH PRESSURE BUILDS IN FROM THE NORTH. THE HIGH WILL REMAIN IN PLACE THROUGH MID WEEK. STRATUS IN THE VICINITY OF THE COLD FRONT HAS EXPANDED OVER THE PAST COUPLE HOURS SO HAVE INCREASED MORNING CLOUDS A BIT MAINLY EAST. WEAK COLD FRONT ABOUT TO MOVE INTO THE CWA WITH A FEW LINGERING SHOWERS AND PERHAPS A FEW RUMBLES OF THUNDER ACROSS THE NRN COUNTIES. MID/LATE AFTERNOON MODELS BRING ENOUGH DRIER AIR IN WITH THE HIGH THAT AND CONVECTION SHOULD BE PUSHED SOUTH.
TODAY THROUGH MONDAY NIGHT LATEST WATER VAPOR IMAGES SHOWED UPPER LOWS OVER BC AND THE HUDSON BAY. WITH UPPER-LEVEL HIGH PRESSURE CENTERED OVER THE TX PAN. ON THE LARGE SCALE THE UPPER HIGH WILL DOMINATE THE SCNTRL/SERN US THROUGH 12Z TUE AS THE UPPER LOW OVER BC MOVES TO NERN MT. THE WEAK S/W TROF APPROACHES AS AN 850-MB THERMAL RIDGE SETS UP OVER THE AREA WITH A LEE SFC TROF OVER ERN WY. ON MONDAY A S/W TROF WILL ROTATE THRU THE CWA AS THE UPPER LOW MOVES OVER WRN MT. ON MONDAY NGT A STRONG COLD FRONT WILL PASS THROUGH THE CWA WITH 25-45KT 850-MB WINDS IN ITS WAKE. THIS WILL BRING MUCH DRIER AND COOLER AIR INTO THE REGION ON GUSTY NORTHWEST WINDS.
535 AM EDT SUN JUL 26 2015 A WEAKENING COLD FRONT WILL TRIGGER ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS TODAY INTO TONIGHT. BUT PRESENCE OF BOUNDARY AND PASSAGE OF WEAK COLD FRONT LATER THIS AFTERNOON WILL TRIGGER ISOLATED TO SCATTERED SHRA/TSRA BY THIS AFTERNOON AND CONTINUING INTO TONIGHT.
314 AM CDT SUN JUL 26 2015 Upper ridge centered over the Panhandle this morning will begin to be displaced eastward Monday by upper trough moving across from the NW. As the trough passes east the ridge will be pushed back to the west later in the week becoming centered over the 4 corners region. However should see a slight dip in temps after the upper ridge is displaced. Satellite shows few clouds over the center of TX as the ridge pushes the convection out to the edges.
309 AM CDT SUN JUL 26 2015 THE UPPER LEVEL RIDGE WILL REMAIN CENTERED JUST NORTHWEST OF THE REGION AGAIN TODAY BUT WILL START A SLIDE TO THE EAST LATER TODAY AND TONIGHT. IF THIS CONTINUES ON TRACK TODAY AROUND THE EASTERN PERIPHERY OF THE UPPER LEVEL RIDGE. WHEN THE MOISTURE CONTENT INCREASES IN UPPER LEVEL RIDGING PATTERNS.
302 AM EDT SUN JUL 26 2015 HIGH PRESSURE RIDGING INTO THE AREA FROM THE MID-ATLANTIC WILL ENSURE DRY CONDITIONS TODAY.
248 AM CDT SUN JUL 26 2015 CENTER OF UPPER HIGH IS NOW OVER TX WHILE A SFC BOUNDARY EXTENDS FROM KS THRU THE OHIO VALLEY AND INTO THE NERN US. AT 230 AM TEMPS ACROSS THE CWA WERE IN THE LOWER 70S WITH DEWPOINTS IN THE UPPER 60S.
350 AM EDT SUN JUL 26 2015 SHOWERS CONTINUE ACROSS THE NORTH COUNTRY THIS MORNING AS A MID LEVEL TROUGH PROGRESSES EASTWARD.
315 AM PDT SUN JUL 26 2015 A LOW PRESSURE SYSTEM PASSING TO THE NORTH THROUGH MONDAY WILL BRING NIGHT THROUGH MORNING LOW CLOUDS TO THE COASTAL PLAIN WHILE TEMPERATURES REMAIN NEAR SEASONABLE LEVELS.
AS THE LOW KEEPS DROPPING TOWARD THE LOWER 48 TODAY. THAT ACTIVITY WILL EVENTUALLY BUILD SOUTHWARD ACROSS THE SNAKE PLAIN AND MAGIC VALLEY AS THE REAL COLD FRONT BEGINS TO PUSH INTO EASTERN IDAHO. CLOSER TO THE CENTER OF THE LOW TOMORROW. WE ARE STILL THINKING A BIT OF WET SNOW MAY FALL ON THE HIGHEST PEAKS OF THE LOST RIVER AND LEMHI RANGES.
VFR conditions are expected the next 24 hours at the west Texas and southeast New Mexico terminals underneath a ridge. /ISSUED 314 AM CDT SUN JUL 26 2015/ Upper ridge centered over the Panhandle this morning will begin to be displaced eastward Monday by upper trough moving across from the NW. As the trough passes east the ridge will be pushed back to the west later in the week becoming centered over the 4 corners region. However should see a slight dip in temps after the upper ridge is displaced. Satellite shows few clouds over the center of TX as the ridge pushes the convection out to the edges.
AS THE WARM FRONT LIFTS NORTH AND INSOLATION WARMS UP THE MOIST BOUNDARY LAYER, THE HEAT INDICES WILL GAIN BECOME UNCORMFORTABLE ACROSS MUCH OF THE AREA.
WATER VAPOR IMAGERY IS CURRENTLY SHOWING A LARGE UPPER LOW AND TROUGH MOVING SOUTH ALONG THE BRITISH COLUMBIA COASTLINE THIS MORNING. THIS LOW AND TROUGH WILL MOVE SOUTH AND ONTO THE PACIFIC NORTHWEST COAST TODAY RESULTING IN AN INCREASING SOUTHWEST FLOW ALOFT ACROSS OUR FORECAST AREA TODAY AND TONIGHT. THE MAIN FOCUS SHIFTS TO LATE TONIGHT THROUGH THE DAY MONDAY WHEN THE UPPER LOW/TROUGH MOVE ACROSS THE STATE. A STRONG COLD FRONT WILL MOVE THROUGH OUR WESTERN AREAS LATE TONIGHT OR EARLY MONDAY MORNING.
340 AM EDT SUN JUL 26 2015 HIGH PRESSURE RESIDES OVER THE MID ATLANTIC REGION THIS MORNING. THE HIGH REMAINS OFF THE COAST THROUGH MIDWEEK.
201 AM EDT SUN JUL 26 2015 A WEAKENING COLD FRONT SINKS INTO SE OHIO AND NRN WEST VIRGINIA LATE TODAY.
A RIDGE IS CENTERED OVER WEST TEXAS. WITH A WEAK UPPER TROF OVER THE FLORIDA PENINSULA. UPPER RIDGING TRIES TO BUILD SLIGHTLY EASTWARD OVER THE NEXT FEW DAYS.
656 AM EDT SUN JUL 26 2015 HIGH PRESSURE WILL DRIFT OFFSHORE TODAY.
316 AM EDT SUN JUL 26 2015 HIGH PRESSURE WILL BRING FAIR AND SEASONABLE WEATHER ALONG WITH A GRADUAL WARMING TREND INTO THE UPCOMING WEEK. A LOW PRESSURE SYSTEM WILL DEVELOP ALONG A STALLED FRONT ACROSS FLORIDA. IR CHANNEL SHOWS BANDS OF CONVERGENCE IN THE LOW-LEVELS OFFSHORE OF THE CAROLINAS. NORTH OF A LOW PRESSURE TROUGH EXTENDING OFF FLORIDA.
639 AM EDT SUN JUL 26 2015 A WEAKENING COLD FRONT WILL TRIGGER ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS TODAY INTO TONIGHT. BUT PRESENCE OF BOUNDARY AND PASSAGE OF WEAK COLD FRONT LATER THIS AFTERNOON WILL TRIGGER ISOLATED TO SCATTERED SHRA/TSRA BY THIS AFTERNOON AND CONTINUING INTO TONIGHT.
PRECIPITATION COVERAGE AND INTENSITY SHOULD INCREASE SUNDAY AND SUNDAY NIGHT ACROSS CENTRAL AREAS AS THE MONSOON MOISTURE PLUME BRIEFLY STRENGTHENS IN RESPONSE TO A DEEPENING UPPER LEVEL TROUGH ON THE WEST COAST.
404 AM EDT SUN JUL 26 2015 A WEAK COLD FRONT APPROACHES THE REGION TODAY THEN DISSIPATES TO OUR NORTH TONIGHT INTO MONDAY.
500 AM EDT SUN JUL 26 2015 A WARM FRONT WILL APPROACH TODAY.
423 AM CDT SUN JUL 26 2015 MORE TRIPLE DIGIT HEAT IN THE OFFING OVER THE NEXT FEW DAYS AS THE UPPER RIDGE AXIS IS EXPECTED TO EXPAND FARTHER EAST INTO THE MID SOUTH REGION. THE RESULT IS MORE OF THE SAME FOR OUR NECK OF THE WOODS WITH MINIMAL RAIN CHANCES AND THE BEST ODDS TODAY BEING ACROSS OUR FAR ERN/SRN SECTIONS A BIT FARTHER REMOVED FROM THE ERN EXTENT OF THE RIDGE AXIS.
639 AM EDT SUN JUL 26 2015 A WEAKENING COLD FRONT SINKS INTO SE OHIO AND NRN WEST VIRGINIA LATE TODAY.
A weak and broad area of low pressure has developed on the boundary near or just west of Tampa. However, with dew points dropping into the lower to mid 60s, max heat indices will hover around 100 degrees.
HIGHS WILL PROBABLY MODERATE A FEW DEGREES AS UPPER RIDGE SLIGHTLY WEAKENS/FLATTENS OVER THE UPPER TX COAST AS ITS CENTER MIGRATES A BIT FURTHER NE INTO THE MIDWEEK PERIOD. MAY SEE A PASSING IMPULSE OR TWO MOVE OVERHEAD UNDERNEATH THE RIDGE THAT MAY HELP GENERATE A FEW CELLS FROM TIME TO TIME. RAIN CHANCES SHOULD INCREASE FRI-SUN AS THE RIDGE REPOSITIONS ITSELF OVER THE WESTERN STATES.
A SECONDARY WEAK TROUGH LINE/OUTFLOW REMNANT ACROSS NORTH CENTRAL KANSAS HAS SPARKED SOME STORM ACTIVITY AND MAY SNEAK SOMETHING TOWARD ORD BY MID EVENING. ALTHOUGH TEMPERATURES WILL ALSO BE A BIT WARMER. SUNDAY NIGHT THROUGH MONDAY NIGHT THE UPPER LEVEL RIDGE OVER THE AREA THIS WEEKEND WILL GRADUALLY MOVE TO THE EAST AS AN UPPER LEVEL TROUGH DEEPENS IN THE WESTERN CONUS.
214 AM PDT SUN JUL 26 2015 GUSTY WINDS EXPECTED THIS AFTERNOON AS A LOW PRESSURE SYSTEM PUSHES SOUTH FROM THE PACIFIC NORTHWEST. SOUTHWESTERLY WINDS ASSOCIATED WITH THE LOW MAY ALSO INCREASE SMOKE TRANSPORT INTO THE EASTERN SIERRA AND WESTERN NEVADA TODAY. BUILDING HIGH PRESSURE WILL BRING ABOVE NORMAL TEMPERATURES MIDWEEK, WITH THUNDERSTORMS POSSIBLE LATER IN THE WEEK. AN UPPER LEVEL TROUGH WILL DROP SOUTH FROM THE PACIFIC NORTHWEST TODAY. THE BULK OF THE DENSE SMOKE FROM THE LOWELL WILDFIRE WILL REMAIN WEST OF THE SIERRA CREST THIS MORNING BUT AS DEEP LAYER SOUTHWESTERLY FLOW DEVELOPS WITH THE TROUGH, EXPECTING INCREASED SMOKE TRANSPORT INTO THE EASTERN SIERRA AND WESTERN NEVADA BY THIS AFTERNOON.
VERY TRANQUIL WEATHER OVERNIGHT WITH JUST VERY SLIGHT RAIN CHANCES SUNDAY AFTERNOON AND EVENING FOR THE HIGHER ELEVATIONS.
340 AM CDT SUN JUL 26 2015 UPPER LEVEL HIGH WHICH HAS PERSISTED ABOVE THE REGION FOR SOME TIME IS PROGGED TO DRIFT EASTWARD SOMEWHAT OVER THE NEXT 24 HOURS RESULTING IN A BIT MORE SOUTHERLY COMPONENTS ESPECIALLY ACROSS OUR WESTERN ZONES. DESPITE THE EASTWARD MOVEMENT OF THE UPPER HIGH. THE CENTER OF THE UPPER HIGH WILL BEGIN TO SHIFT NEWD TO THE OZARK PLATEAU AS EARLY AS MONDAY AFTN.
326 AM EDT SUN JUL 26 2015 HIGH PRESSURE WILL BUILD INTO THE REGION THROUGH THE WEEKEND.
643 AM EDT SUN JUL 26 2015 HIGH PRESSURE RESIDES OVER THE MID ATLANTIC REGION THIS MORNING. THE HIGH REMAINS OFF THE COAST THROUGH MIDWEEK.
DEWPOINTS AHEAD OF THIS TROUGH ARE IN THE MID TO UPPER 60S. HAIL AND STRONG WINDS WILL BE THE MAIN THREATS AS THE LOW LEVEL SHEAR IS PRETTY WEAK. THE NEXT FORECAST CHALLENGE WILL THEN BE THE STRONG LOW PRESSURE SYSTEM SET TO INFLUENCE THE REGION MONDAY/MONDAY NIGHT.
659 AM EDT SUN JUL 26 2015 HIGH PRESSURE RESIDES OVER THE MID ATLANTIC REGION THIS MORNING. THE HIGH REMAINS OFF THE COAST THROUGH MIDWEEK.
HIGH PRESSURE WILL BUILD INTO THE REGION. AS THE SUPPORTING UPPER-LEVEL TROUGH PUSHES OFF TO THE SOUTHEAST. SYSTEM KIND OF STALLS AS THE RDG OVER THE GREAT LAKES AND WRN NY BEGINS TO BLD TRAPPING THE TROF BETWEEN IT AND A RDG OVER THE WRN ATLANTIC.
SURFACE COLD FRONT BEGINNING TO MOVE INTO EASTERN WASHINGTON STATE THIS AFTERNOON. TEMPERATURES ARE FORECAST TO BE WARMER SUNDAY OVER TODAY. BEST FIRE WEATHER DAY LOOKS TO BE SUNDAY NIGHT INTO MONDAY NIGHT AS THE DRY COLD FRONT APPROACHES FROM THE NORTHWEST. THIS SHOULD PUSH A SURFACE COLD FRONT SOUTH ACROSS THE CWA ON TUE.
134 AM EDT SUN JUL 26 2015 WARM FRONT WILL LIFT ACROSS OUR FORECAST AREA THIS EVENING FOLLOWED BY A COLD FRONT EARLY ON SUNDAY.
302 AM MDT SUN JUL 26 2015 A RIDGE WILL CONTINUE OVER THE PLAINS THROUGH TONIGHT AND THEN SHIFT EAST INTO THE MISSOURI VALLEY MONDAY.
A WARMING TREND IS EXPECTED BY MID WEEK AS HIGH PRESSURE STRENGTHENS. INTERACTION BETWEEN AN UPPER TROUGH OVER THE PAC NW AND AN UPPER RIDGE OVER THE SOUTH CENTRAL CONUS IS PROVIDING FOR A DRY WEST-SOUTHWEST FLOW ALOFT OVER CENTRAL CA ALONG WITH CLEAR SKIES AND NEAR NORMAL TEMPERATURES. THE TROUGH HAS BEEN SLOWLY DEEPENING OVER NORCAL. 06Z WRF INDICATING THE TROUGH WILL SLOWLY DEEPEN TODAY AND TONIGHT WITH THE MAIN IMPACT BEING ANOTHER EVENING OF GUSTY WINDS OVER THE RIDGE OF THE TEHACHAPI MOUNTAINS AND BELOW THE PASSES IN KERN COUNTY AND WESTERN MERCED COUNTY.
145 AM EDT SUN JUL 26 2015 WARM FRONT WILL LIFT ACROSS OUR FORECAST AREA THIS EVENING FOLLOWED BY A COLD FRONT EARLY ON SUNDAY.
622 AM EDT SUN JUL 26 2015 HIGH PRESSURE WILL BRING FAIR AND SEASONABLE WEATHER ALONG WITH A GRADUAL WARMING TREND INTO THE UPCOMING WEEK. A LOW PRESSURE SYSTEM WILL DEVELOP ALONG A STALLED FRONT ACROSS FLORIDA. IR CHANNEL SHOWS BANDS OF CONVERGENCE IN THE LOW-LEVELS OFFSHORE OF THE CAROLINAS. NORTH OF A LOW PRESSURE TROUGH EXTENDING OFF FLORIDA.
BREEZY SOUTHWEST WINDS TODAY AHEAD OF A STRONG LOW PRESSURE SYSTEM MOVING INTO THE PACIFIC NORTHWEST. MONDAY WILL BE MUCH COOLER COURTESY OF A COLD FRONT.
324 AM EDT SUN JUL 26 2015 A WEAK COLD FRONT IN THE AREA WILL MOVE SOUTH EARLY TODAY AS HIGH PRESSURE BUILDS IN FROM THE NORTH. THE HIGH WILL REMAIN IN PLACE THROUGH MID WEEK. WEAK COLD FRONT ABOUT TO MOVE INTO THE CWA WITH A FEW LINGERING SHOWERS AND PERHAPS A FEW RUMBLES OF THUNDER ACROSS THE NRN COUNTIES. MID/LATE AFTERNOON MODELS BRING ENOUGH DRIER AIR IN WITH THE HIGH THAT AND CONVECTION SHOULD BE PUSHED SOUTH.
407 AM MDT SUN JUL 26 2015 As a large low pressure system impacts the region, a broad swath of showers and isolated embedded thunderstorms are moving across west central Montana and parts of central Idaho this morning. Breezy afternoon winds will be possible today, mainly for western Montana ahead of the cold frontal passage. Daytime temperatures will feel much cooler, and some snow may fall as low as 7500-8000 ft such as in the Bitterroots, Pintlers, and the high terrain in Lemhi County, ID.
MUCH WARMER AIR WILL MOVE IN BEHIND THE LOW MONDAY BRINGING TEMPERATURES MUCH ABOVE NORMAL.
143 AM EDT SUN JUL 26 2015 HIGH PRESSURE WILL BUILD INTO THE REGION THROUGH THE WEEKEND.
143 AM EDT SUN JUL 26 2015 A WEAK COLD FRONT WILL PUSH SOUTHEAST ACROSS THE FORECAST AREA TONIGHT. HIGH PRESSURE WILL BUILD OVER THE AREA SUNDAY AND CONTINUE THROUGH MID WEEK. MONITORING A CLUSTER OF THUNDERSTORMS THAT HAVE DEVELOPED AHEAD OF A COLD FRONT THAT IS NOW TO THE IMMEDIATE WEST OF DETROIT. FOR THE REMAINDER OF THE FORECAST PERIOD HIGH PRESSURE REMAINS OVER THE AREA PROVIDING A DRY FORECAST.
SOUTHWEST FLOW ALOFT WILL CONTINUE OVER OUR REGION THROUGH MONDAY WITH SEVERAL WEAK SHORT WAVE TROUGHS MOVING OVER. IT IS DIFFICULT TO TELL HOW FAR NORTHEAST THEY WILL MAKE IT THROUGH THE NIGHT AS A WARM FRONT PUSHES NORTH. THE MODELS SHOW A STRONG UPPER LEVEL LOW PRESSURE AREA/TROUGH IN SOUTHWEST CANADA TODAY DROPPING SOUTH AND THEN EAST ACROSS THE CANADIAN/US BORDER THROUGH MONDAY NIGHT AND INTENSIFYING.
409 AM EDT SUN JUL 26 2015 LOW PRESSURE TO THE NORTH WILL CONTINUE TO BRING UNSETTLED WEATHER TO THE AREA THROUGH AT LEAST THE MIDDLE OF THE WEEK.
351 AM CDT Sun Jul 26 2015 (Today and Tonight) Another hot day is forecast across West Central Texas as an upper level ridge remains centered over the area. Upper level ridge remains in place for Monday so hot temperatures will continue. Ridge does shift just enough to allow thickness values to ease by the middle of the upcoming week and allow afternoon highs to decrease a few degrees, or at least keep highs below the 100 degree mark for most areas. Weekend rain chances still look possible, albeit slim, as the ridge shifts to the west and places the southern plains into northwest flow aloft.
429 AM EDT SUN JUL 26 2015 A WEAKENING COLD FRONT SINKS INTO SE OHIO AND NRN WEST VIRGINIA LATE TODAY.
THIS AFTERNOON'S ISOLATED STORMS OVER THE HIGHER TERRAIN HELD WEST OF THE FORECAST AREA. WITH THE LOWER READINGS ATYPICALLY EXPECTED IN THE EASTERN CWA. -GIH A DEVELOPING NW FLOW ALOFT AIDED BY THE STRONG RIDGE OVER THE SOUTHERN PLAINS BUILDING EASTWARD WILL BRING HOTTER TEMPERATURES MONDAY. A WEAK PIEDMONT TROUGH IS EXPECTED WHICH COULD HELP INITIATE A FEW AFTERNOON THUNDERSTORMS. STRONG UPPER RIDGING OVER THE MISSISSIPPI VALLEY WILL GENERATE HOTTER AND MORE HUMID CONDITIONS INTO CENTRAL NC THROUGH MID TO LATE WEEK.
400 AM EDT SUN JUL 26 2015 A WEAK COLD FRONT APPROACHES THE REGION TODAY THEN DISSIPATES TO OUR NORTH TONIGHT INTO MONDAY.
EXPECTING CONVECTION TO BE LIMITED AGAIN TODAY TO THE HIGH TERRAIN ALONG THE TN-NC LINE.
THE UPPER LEVEL LOW WHICH WAS PARKED TO OUR WEST THE PAST SEVERAL DAYS HAS STARTED TO ABSORB INTO THE WESTERLIES. HEIGHTS HAVE INCREASED ACROSS THE FLORIDA PENINSULA AS SUBTROPICAL RIDGING REASSERTS ITS INFLUENCE (SEE 12Z 500 MB RAOB ANALYSIS). MAINLY SOUTHWEST OF THE LOWER KEYS.
LLVL RH PROGS DO SHOW POCKETS OF HIGHER RH SWINGING WESTWARD IN THE LOW LEVEL EASTERLY FLOW REGIME. WEAKENING UPPER LOW OVER ERN NEBRASKA AND UPPER LEVEL DIFLUENCE BETWEEN THIS FEATURE AND FASTER FLOW TO THE NORTH. WHILE NEBRASKA UPPER LOW FURTHER WEAKENS AND SLIDES SOUTH. HIGH CLOUDS WILL REMAIN OVER SRN WI INTO TONIGHT BUT MAY THIN AND DISSIPATE TONIGHT AS NE UPPER LOW SHIFTS FURTHER SWD.
1109 AM CDT FRI SEP 25 2015 HIGH PRESSURE CONTINUES OVER THE AREA THIS MORNING.
HIGH PRESSURE OVER THE SOUTHWESTERN UNITED STATES WILL MAINTAIN UNSEASONABLY WARM CONDITIONS THROUGH THE UPCOMING WEEKEND. A HIGH AMPLITUDE RIDGE REMAINS OVER THE INTERMOUNTAIN WEST AND DESERT SOUTHWEST THIS MORNING. WITH INCREASING SOUTHWESTERLY FLOW OUT AHEAD OF A PACIFIC NORTHWEST TROUGH. THE RIDGE IS EXPECTED TO FLATTEN A BIT OVER THE WEEKEND. AS A PART OF THE AFOREMENTIONED TROUGH SLIDES ACROSS IDAHO AND MONTANA.
THE SHORT TERM WILL SEE A 500 MB BUILD INTO THE AREA AS AN UPPER LOW NEAR OMAHA DROPS SOUTH. OVERALL THOUGH HRRR/RAP SHOWING BEST FOG IN THE SOUTH AND WESTERN FCST AREA SEENS REASONABLE WHILE ERN FCST AREA SEES THE LOW CLOUDS. WARMER SATURDAY WITH SOME AREAS AROUND 80 OR LOW 80S.
A WEAK COLD FRONT WILL MOVE THROUGH THE WATERS TODAY. OFFSHORE HIGH PRESSURE AND A THERMAL TROUGH WILL DEVELOP LATE TONIGHT AND PERSIST THROUGH THE WEEKEND.
1134 AM EDT FRI SEP 25 2015 HIGH PRESSURE AND DRY WEATHER WILL REMAIN OVER THE REGION INTO TONIGHT. UPPER LOW OVER THE DEEP SOUTH WILL CONTINUE TO SLOWLY DRIFT NORTH THIS PERIOD WHILE UPPER LOW OVER PLAINS DRIFTS SOUTH. THERMAL FIELDS REMAIN SIMILAR TO PAST FEW DAYS AND EVEN A DEGREE OR TWO WARMER THAN YESTERDAY. A CUT-OFF UPPER LOW OVER GEORGIA WILL DRIFT NORTH INTO THE OH/TN VALLEYS SATURDAY.
733 AM EDT FRI SEP 25 2015 AN UPPER LOW OVER GEORGIA WILL WEAKEN AS IT SLOWLY LIFTS NORTH INTO THE OHIO VALLEY THIS WEEKEND.
549 AM MDT FRI SEP 25 2015 A QUIET WEATHER PERIOD WILL CONTINUE OVER THE NEXT SEVERAL DAYS WITH UPPER-LEVEL RIDGING IN PLACE. BUT MID- LEVEL FLOW IS NOT PARTICULARLY STRONG WITH A RIDGE AXIS PARKED OVER THE CENTRAL ROCKIES.
730 AM EDT FRI SEP 25 2015 HIGH PRESSURE SPRAWLING SOUTH FROM JAMES BAY WILL KEEP FAIR DRY WEATHER IN PLACE THROUGH AT LEAST THE UPCOMING WEEKEND. ONE SOURCE OF MOISTURE IS A REGION OF LOW PRESSURE OVER THE SOUTHEASTERN STATES AND THE OTHER IS A LENGTHY PLUME FROM THE GULF OF MEXICO TO LOW PRESSURE IN THE MIDWEST.
1146 AM EDT FRI SEP 25 2015 HIGH PRESSURE AND DRY WEATHER WILL REMAIN OVER THE REGION INTO TONIGHT. UPPER LOW OVER THE DEEP SOUTH WILL CONTINUE TO SLOWLY DRIFT NORTH THIS PERIOD WHILE UPPER LOW OVER PLAINS DRIFTS SOUTH. THERMAL FIELDS REMAIN SIMILAR TO PAST FEW DAYS AND EVEN A DEGREE OR TWO WARMER THAN YESTERDAY. A CUT-OFF UPPER LOW OVER GEORGIA WILL DRIFT NORTH INTO THE OH/TN VALLEYS SATURDAY.
THE WEAK TROUGH OFF THE EAST COAST WILL SLIDE WESTWARD TODAY AND TONIGHT AND ALLOW LOW LVL FLOW TO BECOME ONSHORE AIDED BY THE EAST COAST SEA BREEZE THIS AFTERNOON.
1121 AM EDT FRI SEP 25 2015 HIGH PRESSURE WILL BUILD ACROSS THE REGION OVERNIGHT THROUGH SATURDAY.
621 AM CDT FRI SEP 25 2015 A large area of high pressure over southeast Canada will continue to bring pleasant weather to central Illinois for the next 24 hours. Focus in the shorter term remains with the upper low currently moving north-northwest through Georgia. Showers continue to be progged along the northern and eastern flanks of the low track, with a few conceivably reaching the extreme southeast CWA late tonight.
1153 AM EDT FRI SEP 25 2015 AN UPPER LOW OVER GEORGIA WILL WEAKEN AS IT SLOWLY DRIFT NORTH INTO THE OHIO VALLEY THIS WEEKEND.
932 AM MDT FRI SEP 25 2015 WITH HIGH PRESSURE OVERHEAD AND SOME RECORD HIGH TEMPS BEING BROKEN YESTERDAY. NO UPDATES NECESSARY THIS MORNING WITH HIGH PRESSURE PARKED OVERHEAD. HIGH PRESSURE OVER THE CENTRAL AND SOUTHERN ROCKIES WILL REMAIN IN PLACE THROUGH THIS WEEKEND KEEPING MAINLY DRY AND WARM CONDITIONS IN PLACE.
607 AM CDT FRI SEP 25 2015 An upper level low is evident on satellite imagery spinning across eastern Nebraska this morning. This low, however, will finally retrograde back to the southwest today and take with the added cloud cover, and showers we have experienced the past couple days. With that system a non-player for the local area, the main feature of interest becomes the broad upper level ridging over much of the CONUS.
THE UPPER LEVEL LOW THAT WAS OVER THE GULF COAST YESTERDAY AT THIS TIME HAS FINALLY STARTED TO MOVE NORTHWARD INTO THE TENNESSEE VALLEY THIS MORNING. OVER THE NEXT 24 HRS, AN UPPER LEVEL LOW PRESSURE AREA WILL MOVE SLOWLY WESTWARD, FROM THE SOUTHEAST ATLANTIC SEABOARD AND INTO THE TENNESSEE VALLEY.
607 AM CDT FRI SEP 25 2015 THE TROPICAL STORM REMNANTS ARE SHIFTING SOUTH THIS MORNING WITH UPPER RIDGING TO THE WEST AND AND UPPER LOW TO THE SOUTHEAST.
845 AM EDT FRI SEP 25 2015 AN UPPER LOW OVER GEORGIA WILL WEAKEN AS IT SLOWLY LIFTS NORTH INTO THE OHIO VALLEY THIS WEEKEND.
SHORT TERM: (Through Late This Afternoon) A longwave upper level RIDGE dominates the central CONUS early this morning with a pair of upper LOWs of note imbedded within this RIDGE. This LOW was slowly drifting to the south. Temps ranged from the mid 50s to the lower 60s at 07z. Despite the NE winds, the overall pattern is one that strongly favors above average temps and with neither LOW to have much impact today, we should see temps return to values similar to persistence with maxes in the low-mid 80s, or about 5 to 10 degrees above average for late September.
648 AM CDT FRI SEP 25 2015 UPPER LOW CONTINUES TO GRADUALLY FILL AS IT SINKS SOUTHWARD. HIGH TEMPERATURES WILL BE HELD TO THE LOW TO MID 70S.
UPPER LEVEL WINDS WILL BE INCREASING AHEAD OF A LOW PRESSURE SYSTEM OVER THE EASTERN PACIFIC.
AN UPPER LOW IS CONTINUING TO LIFT NORTHWARD OVER NORTHWEST GEORGIA THIS MORNING AND THIS LOW WILL CONTINUE TO LIFT NORTHWEST AND FILL THROUGH TONIGHT INTO SATURDAY. AS HIGH PRESSURE RIDGING CONTINUES. LATEST WATER VAPOR IMAGE THIS MORNING SHOWS A PRONOUNCED MID/UPPER LEVEL LOW SPINNING OVER CENTRAL GEORGIA AND SLOWLY LIFTING NORTH NORTHWEST. THIS TREND WILL CONTINUE THROUGH THE PERIOD WITH THE LOW WEAKENING IN THE PROCESS AS IT LIFTS UP INTO AND THROUGH CENTRAL TENNESSEE DURING THE DAY SATURDAY.
1007 AM EDT FRI SEP 25 2015 HIGH PRESSURE SPRAWLING SOUTH FROM JAMES BAY WILL KEEP FAIR DRY WEATHER IN PLACE THROUGH AT LEAST THE UPCOMING WEEKEND. ONE SOURCE OF MOISTURE IS A REGION OF LOW PRESSURE OVER THE SOUTHEASTERN STATES AND THE OTHER IS A LENGTHY PLUME FROM THE GULF OF MEXICO TO LOW PRESSURE IN THE MIDWEST.
753 AM EDT FRI SEP 25 2015 APPROACHING LOW PRESSURE WILL INCREASE CLOUDS AND RAIN CHANCES FOR THE WEEKEND. UPPER-LEVEL LOW PRESSURE OVER THE SERN CONUS WILL CONT TO SHUNT MOISTURE OVER THE UPPER OHIO REGION TODAY. TODAYS IMPACTS WILL ONLY BE OF A CIRROSTRATUS INCREASE OUTSIDE OF THE RIDGES. THE MOISTURE FLOW IS PROJECTED TO CONTINUE THROUGH THE WEEKEND AS THE LOW DIGS WEAK TOWARD THE MID OHIO VALLEY. BUT STABILITY AND DOWNSLOPE FLOW TO THE WEST OF THE RIDGES ARE PROGGED TO SUPPORT A GENERAL LIGHT RAIN.
OVER THE NEXT 24 HRS, AN UPPER LEVEL LOW PRESSURE AREA WILL MOVE SLOWLY WESTWARD, FROM THE SOUTHEAST ATLANTIC SEABOARD AND INTO THE TENNESSEE VALLEY.