Aikyam-Lab/Synoptic-Bench huggingface dataset:
AREAS OF CLOUDS AND FLURRIES ALONG THE WESTERN EDGE OF THE HIGH PRESSURE AREA ARE GRADUALLY DECREASING IN COVERAGE AS SYNOPTIC SCALE SUBSIDENCE INCREASES OVER THE REGION. HIGH TEMPERATURES ONLY REACHED THE SINGLE DIGITS ABOVE ZERO OVER MOST OF SOUTH DAKOTA WITH WARMER TEMPERATURES. ATURDAY ISSUED AT 237 PM MST SAT JAN 9 2016 NORTHERN PLAINS WILL BE UNDER NORTHWEST FLOW THROUGH MUCH OF THE WORK WEEK AS A LARGE UPPER TROUGH PERSISTS ACROSS THE ERN TWO THIRDS OF THE CONUS.
305 AM CST SUN JAN 10 2016 LATEST WATER VAPOR IMAGERY SHOWS A CLOSED UPPER LEVEL LOW OVER SOUTHERN INDIANA/NORTHERN KENTUCKY. WHILE THE MAIN UPPER TROUGH WAS SITUATED ACROSS THE CENTRAL U. UPPER LEVEL RIDGING WAS BUILDING IN OVER THE THE WESTERN COAST. THE LOW WAS ROUGHLY COINCIDENT WITH ITS PARENT UPPER LOW. AND THE COLD FRONT WAS JUST EAST OF THE FORECAST AREA. IT SEEMS THAT THE MOISTURE HAS REMAINED FAIRLY CLOSE TO THE CENTER OF THE LOW. THERE IS SOME DECENT MOISTURE REMAINING IN THE LOWER LEVELS ACROSS THE AREA. TEMPERATURES ARE EXPECTED TO REACH THE FREEZING MARK BY 12Z. SHORT TERM HIRES GUIDANCE SHOWS MOST OF THE PRECIP EXITING BEFORE WE FALL TO OR BELOW FREEZING. BUT CONFIDENCE IS STILL TOO LOW TO ADD MENTION OF FREEZING DRIZZLE OR EVEN SNOW FLURRIES. HIGH PRESSURE WILL SETTLE IN ON MONDAY.
333 AM CST SUN JAN 10 2016 Cold high pressure center dropping south across the plains this morning has relaxed winds as the center of the high draws closer. High pressure will quickly slide south and east today and tonight.
MODELS ALL BROUGHT QPF INTO THE WISCONSIN AS THE SURFACE SYSTEM AND A MID LEVEL SHORT WAVE TROUGH PASS SOUTHEAST OF WISCONSIN TONIGHT. THE INSTABILITY OVER THE LAKE PLUS A MID LEVEL TROUGH AXIS PASSING THROUGH THE STATE WILL HELP TO PRODUCE SNOW SHOWERS. THE SURFACE PRESSURE GRADIENT SHOULD TIGHTEN AS THE LOW APPROACHES.
A COLD FRONT IS DRAPED FROM THE FAR EASTERN FLORIDA PANHANDLE. AHEAD OF THE COLD FRONT.
Evening update: forecast is generally on track with a ridge building in tonight and Sunday. This will keep the low clouds over the basin/valley areas, while the mountains will see some sun/stars. Cote' 06Z TAFS: A ridge of high pressure will build over eastern Washington and north Idaho through Sunday.
However, decreasing cloud cover is likely overnight along with calmer winds, so look for lows down into the single digits near the I-70 corridor to the lower teens(F) closer to the Oklahoma border. This will draw slightly warmer air northward into the area along the Colorado border with H85 temperatures around 5C below by mid afternoon. Meanwhile, an attendant cold front will push southeastward across western Kansas during the day Monday helping to reinforce a much drier air mass already in place across the region. The drier pattern will persist through at least mid-week as upper level ridging sets up across the Intermountain West while drier air remains predominate under the influence of a general west to northwesterly downslope flow near the surface.
THE WINDS WILL NOT BE QUITE AS STRONG TODAY BUT WHAT LITTLE BREEZE THERE WILL BE WILL STILL MAKE IT FEEL A LITTLE COOLER THAN THE ACTUAL TEMPERATURE. THEY DO AGREE THAT THE LOWER LEVELS NEAR THE SURFACE WILL REMAIN FAIRLY DRY MAKING IT DIFFICULT FOR ANY PRECIPITATION TO REACH THE GROUND.
UPPER LEVEL TROUGH OVER EASTERN WA WILL DROP THROUGH EASTERN OREGON TONIGHT. PATCHY IFR/MVFR CONDITIONS IN VALLEY FOG AND STRATUS IN THE LOWER TREASURE AND BAKER VALLEYS. UPPER RIDGE WILL THEN MOVE EAST. WITH INVERSION CONDITIONS LIKELY UNDER THE RIDGE.
AS SFC RIDGING CONTINUES TO BUILD A INTO THE SRN PLAINS. TEMPS SHOULD FALL TO NEAR TO SLIGHTLY ABOVE FREEZING FARTHER E ACROSS DEEP E TX/N LA. /ISSUED 538 PM CST SAT JAN 9 2016/ MVFR STRATOCU DECKS IN LOW LVL NW FLOW AROUND BACKSIDE OF UPPER LOW MOVING EAST ACROSS LOWER MS RIVER VALLEY.
340 AM CST SUN JAN 10 2016 W TX/SE NM on backside on one upper trough as the next one digs down across the Great Basin.
The highest amounts have been reported north and east of Springfield between the Highway 65 and Interstate 44 corridors where several reports in the 2-4" range have been received. North Canadian high pressure will move over the region Sunday evening through Sunday night. The overall upper level pattern will remain in northwesterly flow through nearly all of the work week with reinforcing rounds of cold high pressure moving across the plains and the Ozarks.
1000 PM MST SAT JAN 9 2016 00Z NAM/RUC/HRRR AND 03Z RUC ARE ADVERTISING THE THREAT FOR FREEZING FOG HAS SHIFTED TO A LINE EXTENDING FROM NEAR BENKELMAN NEBRASKA TO COLBY AND RUSSELL SPRINGS KANSAS OVERNIGHT. THIS COMBINED WITH A WNW(DOWNSLOPE) UPPER FLOW AT 500/700MB WILL GIVE THE CWA A WARMER DAY WITH HIGHS REACHING INTO THE MID AND UPPER 30S. THE PRIMARY INFLUENCE ON OUR WEATHER FROM SUNDAY NIGHT ONWARDS WILL BE THE STRENGTH OF THE WESTERN UNITED STATES HIGH PRESSURE RIDGE. BRIEFLY WEAKENING THE RIDGE OF HIGH PRESSURE. A COLD FRONT SHOULD BE FORCED INTO THE REGION WITH AN ASSOCIATED COOLING OF TEMPERATURES. AS THE HIGH PRESSURE TEMPERATURES SHOULD RECOVER.
332 AM EST SUN JAN 10 2016 LOW PRESSURE WILL BRING RAIN THIS MORNING BEFORE THE PASSAGE OF A STRONG COLD FRONT BRINGS SNOW CHANCES AND MUCH COLDER WEATHER LATER TODAY THROUGH MUCH OF THE UPCOMING WEEK. THE LOW/S ASSOCIATED COLD FRONT IS PROGGED TO CROSS THE REGION FM W-E LT THIS MRNG/ERLY AFTN. WITH A COUPLE OF INCHES PSBL N OF I 80 AND IN THE RIDGES. ESP IN THE RIDGES. LAKE AND TERRAIN ENHANCED SNOW SHOWERS N OF I 80 AND IN THE RIDGES SHOULD CONTINUE TONIGHT. RIDGING AND BACKING FLOW SHOULD END PCPN BY MON MRNG.
Otherwise northerly winds of 10 to 12 KTS should fall to 4 to 6 KTS this evening, shifting southeast midday Sunday as high pressure in. Temperatures will fall quickly this evening, eventually dropping into the low/mid 20s.
SHORT WAVE MOVING OUT OF THE REGION TONIGHT AS AN UPPER LEVEL RIDGE STARTS TO BUILD IN. THE RIDGE WILL BE CENTERED OVER THE PAC NW SUNDAY WITH PARTLY CLOUDY SKIES OVER THE HIGHER TERRAIN. 00Z MODELS CONTINUE TO SHOW ANOTHER WEAK UPPER LEVEL TROUGH MOVING ACROSS THE REGION MONDAY WITH A CHANCE OF LIGHT RAIN OR SNOW. BY SUNDAY EVENING THE UPPER RIDGE AXIS BEGINS TO MOVE OVER THE AREA WHICH WILL BE MORE FAVORABLE FOR FOG DEVELOPMENT INTO THE OVERNIGHT HOURS. ESPECIALLY FOR THE LOWER ELEVATION TERMINALS.
211 AM MST SUN JAN 10 2016 EARLY MORNING WV IMAGERY AND RAP 500 MB ANALYSIS CONTINUES TO SHOW LARGE SCALE TROUGH ACROSS MUCH OF THE US. WITH RIDGING ALONG THE PACIFIC COAST INTO BRITISH COLUMBIA. HIGH PRESSURE IS IN PLACE ACROSS MUCH OF THE PLAINS WITH WEAK TROUGHING ACROSS EASTERN COLORADO. A WEAK STATIONARY FRONT IS ALONG THE CO/KS BORDER JUST EAST OF MAIN TROUGH AXIS. SO ADJUSTMENTS WERE MADE TO INCLUDE FREEZING FOG MENTION FURTHER WEST AS WELL. AND DENSE FREEZING FOG COULD CERTAINLY BE POSSIBLE.
THIS COMBINED WITH A WNW(DOWNSLOPE) UPPER FLOW AT 500/700MB WILL GIVE THE CWA A WARMER DAY WITH HIGHS REACHING INTO THE MID AND UPPER 30S. IN THE BEGINNING STRONG ZONAL FLOW SEEN NOW OVER THE PACIFIC BREAKS THROUGH/FLATTENS CURRENT UPPER RIDGE WITH WEST TO NORTHWEST FLOW ALOFT CONTINUING. OF COURSE DEPENDING ON WHICH MODEL YOU CHOOSE STRONGER RIDGING DEVELOPS OVER THE WEST FOR THE REST OF THE PERIOD AS A STRONG AND COLD UPPER LOW OVER CENTRAL CANADA STARTS MOVING SOUTH.
/ISSUED 926 PM CST SAT JAN 9 2016/ Erosion of widespread low cloudiness across far ern OK and nwrn AR behind exiting cyclone to the east has slowed past couple hours. Regardless, very cold night ahead and temperatures will remain unseasonably cold through Sunday as high pressure settles over the region.
213 AM MST SUN JAN 10 2016 A WEAK TROUGH WILL MOVE THROUGH THE AREA TODAY. DRY WEATHER WITH A GRADUAL WARMING TREND IS EXPECTED THIS WEEK AS WEAK HIGH PRESSURE BECOMES THE DOMINANT WEATHER FEATURE. DEWPOINTS HAVE CLIMBED INTO THE LOW/MID 40S AROUND THE COLORADO RIVER BUT REMAIN IN THE MID 30S ACROSS THE PHOENIX METRO. THE WEAK TROUGH WILL MOVE RAPIDLY THROUGH THE AREA THIS MORNING AND THE AXIS SHOULD BE LOCATED ROUGHLY AROUND I-17 BY EARLY AFTERNOON. NOT MUCH IN THE WAY OF ISENTROPIC ASCENT ASSOCIATED WITH THIS TROUGH AND NOT SURPRISINGLY.
229 AM EST SUN JAN 10 2016 LOW PRESSURE FROM THE LOWER MISSISSIPPI VALLEY WILL TRACK WEST OF PENNSYLVANIA EARLY SUNDAY. A TRAILING COLD FRONT WILL SWEEP THROUGH THE REGION LATE SUNDAY.
WITH THE COLD FRONT AS IT TRAVERSES THE CWA. WILL GET DRY SLOTTED BEHIND THAT FOR A WHILE UNTIL THE UPPER LOW (NOW OVER NE ARKANSAS) ROTATES VORT ENERGY AND DEFORMATION AXIS TOWARDS MIDDLE TN BEFORE PULLING NEWD OUT OF HERE. NEAR-FREEZING TEMPS SHOULD REACH OUR NWRN COUNTIES AS PRECIPITATION IN THE DEFORMATION ZONE MOVES NE AND PULLS OUT TOWARD DAWN. COLD FRONT HAS MADE IT TO THE CUMBERLAND PLATEAU, WITH THE HEAVIEST PRECIPITATION NOW EAST OF THE MID STATE. DRY SLOT BETWEEN THE COLD FRONT AND THE OCCLUDED FRONT MOISTURE BACK TO OUR WEST IS ALLOWING FOR A PERIOD OF VFR CIGS BEFORE CONDITIONS DETERIORATE ONCE MORE WITH THE WRAP-AROUND MOISTURE.
THERE WILL BE ENOUGH CLOUD COVER TO LIMIT THE WARMING THAT WOULD HAVE BEEN POSSIBLE TODAY AND WE SHOULD ONLY END UP A DEG OR TWO WARMER THAN YESTERDAY.
TEMPS ACROSS THE CWA WERE STILL IN THE LOW 50S AT 9PM. HOWEVER MORE LIGHT PCPN IS EXPECTED AFTER MIDNIGHT AS THE UPPER LOW (NOW OVER SERN MO) MOVES NE.
A WEAK WARM FRONT APPROACHING FROM THE WEST LATE SUNDAY INTO MONDAY WILL BRING A SLIGHT CHANCE OF LIGHT SHOWERS NORTH OF SANTA BARBARA.
BRIEF FREEZING FOG WHICH DEVELOPED AROUND THE MIDNIGHT HOURS HAS MOSTLY DISSIPATED AS THE MID TO HIGH CLOUDS MOVED IN FROM THE NORTHWEST. THERE REMAINS POTENTIAL FOR THE FREEZING FOG TO REDEVELOP WHEN THE CLOUDS THIN AS DRIER AIR ALOFT WORKS ITS WAY SOUTHWARD OUT OF COLORADO.
247 AM CST SUN JAN 10 2016 Just made a few last minute adjustments to added snow flurries (trace precipitation) with the approaching cold air stratocumulus working in behind the upper trough and deformation zone.
A COLD FRONT NOW MOVING INTO THE FLORIDA PANHANDLE WILL MOVE SOUTHEAST DOWN THE PENINSULA TODAY. THE HIGHEST RAIN CHANCES WILL BE ACROSS THE WESTERN HALF OF THE AREA THROUGH EARLY THIS AFTERNOON. HIGHS WILL REACH INTO THE LOWER 80S SE COAST ON A SW WIND FLOW. AS THE FRONT CLEAR THE AREA THIS EVENING, MUCH COOLER AND DRIER AIR WILL ADVECT DOWN THE PENINSULA ON NW WINDS.
DECREASED SKY COVER AND THE INFLUENCE FROM A RIDGE IN THE WEST WILL ALLOW TEMPERATURES TO BEGIN TO RECOVER SUNDAY.
AN UPPER TROUGH WILL APPROACH THE PANHANDLES BY SUNDAY EVENING. THE LOW CLOUDS AND FOG WILL RESULT IN MVFR CONDITIONS BECOMING IFR TO LIFR BY SUNDAY AFTERNOON AND 00Z MONDAY. WILL UPDATE AS NECESSARY BUT WILL FORECAST A MORE OPTIMISTIC SCENARIO FOR NOW DUE TO LOW CONFIDENCE IN THE LOW CLOUDS AND FOG AT THIS POINT. TEMPS HAVE REMAINED BELOW FREEZING TODAY MOST OF THE AREA DESPITE M SUNNY SKIES. HIGH PRESSURE RIDGE SETTLING INTO THE AREA AND LIGHT WINDS WILL COMBINE WITH SNOW COVERED AND/OR WET GROUND TO PROVIDE POTENTIAL FOR PATCHY FREEZING FOG LATE TONIGHT AND EARLY SUNDAY ALTHOUGH NOT ALL MODELS SEEM OVERLY IMPRESSED.
SHORT WAVE MOVING OUT OF THE REGION TONIGHT AS AN UPPER LEVEL RIDGE STARTS TO BUILD IN. THE RIDGE WILL BE CENTERED OVER THE PAC NW SUNDAY WITH PARTLY CLOUDY SKIES OVER THE HIGHER TERRAIN. 00Z MODELS CONTINUE TO SHOW ANOTHER WEAK UPPER LEVEL TROUGH MOVING ACROSS THE REGION MONDAY WITH A CHANCE OF LIGHT RAIN OR SNOW.
FREEZING FOG ALREADY IMPACTING KLVS AND FORECAST TO DEVELOP AT KROW BY 09Z. PATCHES OF FREEZING FOG LIKELY JUST ABOUT ANYWHERE. WITH VERY LITTLE MIXING OF THE LOWER BOUNDARY LAYER EXPECTED.
TONIGHT LINGERING FLURRY IS POSSIBLE EARLY IN THE EVENING ALONG THE HIGHER TERRAIN NEAR THE VA BORDER. FOR MONDAY HIGH PRESSURE WILL PASS TO THE SOUTH WITH COLD AIR LOCKED IN PLACE ACROSS EASTERN KY. THIS WILL BRING MOSTLY SUNNY SKIES AND TEMPS TOPPING OUT IN THE LOWER 30S FOR MOST SPOTS. BASED ON THE TRAJECTORY OF THE LOW PRESSURE SYSTEM SOME SIGHTS WILL SEE A RELATIVE LULL IN THE PRECIP OVERNIGHT DUE TO DRY SLOT.
210 AM EST SUN JAN 10 2016 A WARM FRONT WILL LIFT NORTH THROUGH THE AREA EARLY THIS MORNING WITH A COLD FRONT CROSSING THE AREA SHORTLY AFTER. HIGH PRESSURE BUILDING IN FROM THE WEST WILL BRING DRY WEATHER AND BREEZY CONDITIONS BEHIND THE FRONT TODAY. LOW PRESSURE OVER THE OHIO VALLEY WILL CONTINUE TO PUSH NORTHEASTWARD WHICH WILL LIFT A WARM FRONT NORTHWARD THROUGH THE AREA AND THEN DRAG A COLD FRONT ACROSS THE AREA. WITH THE WARM FRONT LIFTING NORTH. CLOUD COVER WILL DIMINISH THIS MORNING BEHIND THE FRONT AS DRY HIGH PRESSURE BUILDS IN FROM THE WEST. IN THE LOWER 50S WEST TO LOWER 60S EAST. LOW TEMPS TONIGHT WILL BE COOLER THAN NORMAL.
Similar conditions to today are expected again tomorrow as the pattern changes little with the upper level ridge remaining in place.
825 PM EDT TUE SEP 15 2015 SYNOPTIC SCALE PATTERN FEATURING A LONG WAVE TROUGH ACROSS THE WESTERN CONUS AND DOWNSTREAM RIDGE OVER THE EASTERN CONUS. THIS INCREASE IN CLOUD COVER WILL KEEP LOW TEMPS A FEW DEGREES WARMER THAN LAST NIGHT.
OVERALL EXPECT A RETURN TO TEMPS NEAR OR JUST ABOVE NORMAL WITH LOW RAIN CHANCES THROUGH THE REST OF THE WEEK AND THROUGH THE WEEKEND AS HIGH PRESSURE BUILDS AT THE SURFACE AND ALOFT.
WILL SEE THIS CONTINUE THROUGH THE LATE AFTERNOON UNTIL THE LOW LEVEL INVERSION DEVELOPS AND THE GRADIENT EASES SOME.
BROAD TROUGH POSITIONED OVER THE NORTHWEST UNITED STATE. THIS TROUGH WILL SEND SEVERAL WAVES THROUGH THE AREA FOR PRECIP CHANCES THE NEXT COUPLE OF DAYS. THE LOW WILL SURGE INTO THE DAKOTAS AND SEND A COLD FRONT ACROSS.
THE INTERIOR WHERE THE OCEANS MODERATING EFFECT SHOULD NOT BE AS GREAT LOWS IN THE LOW/MID 70S.
HIGH PRESSURE REMAINS SITUATED JUST TO OUR EAST WITH HIGH CLOUDS NOW STREAMING NORTHWARD INTO MIDDLE TENNESSEE. TRANQUIL WEATHER WILL PERSIST FOR THE REST OF THE WORK WEEK THANKS TO THE OVERALL PATTERN THAT FEATURES AN H5 TROUGH OVER THE WESTERN U.
THE UPPER LEVEL TROUGH OVER THE FOLLOWED BY A DRIER AND WARMER WESTERLY FLOW THROUGH THE END OF THE WEEK. A MOIST SOUTHWEST FLOW REMAINS IN PLACE ACROSS THE GREAT BASIN THIS EVE DOWNSTREAM FROM A TROF OVER THE PACNW STATES. THE COLD FRONT ASSOCIATED WITH THE WEST COAST TROF IS HALF WAY ACROSS NV AND IS FORECAST TO CROSS IN NRN UT LATER TONIGHT THRU WED MORNING WITH AN ORGANIZED SWATH OF PRECIP. THE TRAILING UPPER TROF AXIS CROSSING THE NORTH THU SHOULD KEEP A THREAT OF SHOWERS GOING OVER THE NORTH THRU THU THEN THE CWA DRIES. WINDS WILL SHIFT TO NORTHWEST AFTER ABOUT 17Z BEHIND A COLD FRONT AND MVFR CONDITIONS ARE POSSIBLE IN RAIN.
830 PM EDT TUE SEP 15 2015 WITH HIGH PRESSURE IN PLACE ACROSS THE REGION. GIVEN THE STILL WARM WATER TEMPERATURES AND THE COOLER TEMPERATURES OVER THE GROUND SURFACES. CHATTANOOGA AIRPORT, TN 55 82 57 84 / 0 0 0 0 KNOXVILLE MCGHEE TYSON AIRPORT, TN 54 81 55 83 / 0 0 0 0 OAK RIDGE, TN 54 81 56 82 / 0 0 0 0 TRI CITIES AIRPORT, TN 49 80 47 82 / 0 0 0 0.
IN FACT ON THE BUFFALO RIDGE IN SOUTHWEST MN. THE 900MB TEMPERATURES ARE FORECAST TO BE A COUPLE OF DEGREES CELSIUS COOLER THAN THEY ARE TODAY.
Strong upper level ridge parked over the Eastern U.
VISIBLE SATELLITE IMAGERY REVEALS A FEW PATCHY CLOUDS WITH BETTER COVERAGE WEST OF THE SURFACE TROF IN WESTERN NEBRASKA.
TRANQUIL WEATHER WILL PERSIST FOR THE REST OF THE WORK WEEK THANKS TO THE OVERALL PATTERN THAT FEATURES AN H5 TROUGH OVER THE WESTERN U.
732 PM EDT TUE SEP 15 2015 HIGH PRESSURE WILL KEEP CONDITIONS ON THE DRY SIDE THROUGH THE REMAINDER OF THE WEEK. TEMPERATURES WILL TREND SLIGHTLY MILDER AS WARMER AIR WORKS ITS WAY NORTH ON THE WESTERN SIDE OF THE HIGH.
652 PM CDT TUE SEP 15 2015 A STRONG LOW PRESSURE CENTER WAS OVER CENTRAL NORTH DAKOTA. WITH A WARM FRONT EXTENDING NORTHEASTWARD INTO MANITOBA. AND A COLD FRONT ALONG AND EXTENDING SOUTHWARD FROM THE LOW. THE LOW/FRONT WILL CONTINUE MOVING EASTWARD ACROSS THE STATE THIS EVENING. COOLER TEMPERATURES AND MINIMAL CHANCES FOR SIGNIFICANT PRECIPITATION HIGHLIGHT THE SHORT TERM PERIOD. COULD BE A STRAY SHOWER OR TWO BUT IN GENERAL EXPECT A DRY PERIOD BEFORE THE NEXT WAVE LIFTS INTO THE REGION AND COMBINES WITH WEAK FRONTOGENETICAL FORCING BEHIND A COLD FRONT THAT PUSHES THROUGH THE FORECAST AREA THIS AFTERNOON AND THIS EVENING. SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE NEAR AND TO NORTH OF THE LOW. THE LOW WILL CONTINUE TO PROPAGATE TO THE NORTHEAST BRINGING CHANCES OF MODERATE TO HEAVY RAINFALL.
What an impressive day to be outdoors though, as temperatures warmed into the low 80s under mostly sunny skies. While south winds continue, a muggy night is on tap with lows only falling into the middle 60s to the lower 70s.
STLT SHOWS MAINLY CI CLOUDS MOVING ACROSS THE TN VALLEY DUE TO A WEAK UPPER LOW ACROSS PORTIONS OF THE SERN US.
41 SYNOPTIC SCALE PATTERN FEATURING A LONG WAVE TROUGH ACROSS THE WESTERN CONUS AND DOWNSTREAM RIDGE OVER THE EASTERN CONUS. THIS INCREASE IN CLOUD COVER WILL KEEP LOW TEMPS A FEW DEGREES WARMER THAN LAST NIGHT.
GOOD GRADIENT WEDNESDAY AGAIN AS SIGNIFICANT WAVE MOVES OUT OF THE TROUGH AND INTO THE UPPER RIDGE.
LIGHT EAST TO NORTHEAST FLOW SETS UP OVERNIGHT WITH HIGH PRESSURE OVER THE EASTERN US. AN UPPER RIDGE STRETCHING WSW FROM AN UPPER HIGH SITUATED OFF THE EAST COAST WILL SPLIT THROUGH WEDNESDAY.
1022 PM EDT TUE SEP 15 2015 HIGH PRESSURE WILL DOMINATE THE WEATHER RIGHT INTO THE UPCOMING WEEKEND.
651 PM CDT TUE SEP 15 2015 LONG WAVE TROUGH EXTENDS ALONG THE WEST COAST INLAND THROUGH THE WESTERN THIRD OF THE COUNTRY. AN UPPER LEVEL RIDGE OF HIGH PRESSURE IS ESTABLISHED ACROSS THE EASTERN THIRD OF THE COUNTRY. AND REALLY WILL MOVE LITTLE THE NEXT 24 HRS AS SOUTHWEST FLOW ALOFT CONTINUES TO RUN PARALLEL ALONG THE TROUGH AXIS. VERY DRY AIR IS LOCATED TO THE WEST OF THE TROUGH ACROSS PORTIONS OF EASTERN COLORADO INTO THE NEBRASKA PANHANDLE.
UPPER RIDGING BEGINS TO TAKE OVER OUR REGION FOR WEDNESDAY THROUGH THE END OF THE WEEK.
HIGH PRESSURE REMAINS IN CONTROL THROUGH THE TAF PERIOD FOR LIGHT WINDS.
UPPER LEVEL RIDGE AND SUBSIDENCE IS EXPECTED TO BUILD INTO THE REGION FROM THE WEST OVER THE NEXT COUPLE OF DAYS.
WENT TOWARD THE WARMER GUIDANCE FOR MIN TEMPERATURES AT MOST PLACES. WENT WITH THE WARMER MAV GUIDANCE FOR HIGHS ON WEDNESDAY. BASED ON THE WARMER HIGHS THE LAST FEW DAYS COMPARED TO THE MET GUIDANCE.
817 PM EDT TUE SEP 15 2015 HIGH PRESSURE WILL BUILD INTO THE NORTHEAST THROUGH MUCH OF THE WORK WEEK.
/ISSUED 631 PM CDT TUE SEP 15 2015/ AN UPPER LEVEL RIDGE OF HIGH PRESSURE WILL REMAIN OVER THE MID SOUTH FOR THE REMAINDER OF THIS WEEK.
WHILE EXPECT DEEP MOISTURE WILL BE DECREASING AS A RESULT OF SUBSIDENCE CREATED BY BUILDING UPPER LEVEL RIDGE PATTERN. MIN TEMPS INTO THE LOWER TO MID 70S BOTH TONIGHT AND TOMORROW NIGHT AWAY FROM THE COAST.
707 PM CDT TUE SEP 15 2015 COLD FRONT JUST WEST OF MINOT-BISMARCK AT 00Z. THE WARM FRONT HAS LIFTED THROUGH THE NORTHWESTERN COUNTIES AND IS NEAR THE CANADIAN BORDER. THINK THE WARM FRONT WILL CONTINUE TO LIFT NORTH THROUGH THE LATE AFTERNOON AND THE RAP AND HRRR HAVE CONVECTIVE DEVELOPMENT MOSTLY IN SOUTHERN CANADA. THE MODELS ALL HAVE THE LOW ON DIFFERENT TRACKS.
THE ATMOSPHERIC PROFILE WAS MUCH WARMER IN THE MID-LEVELS TODAY.
This evening, winds are expected to lower but still stay elevated throughout the evening as the lee trof near the KS/CO boarder broadens keeping the pressure gradient intact. Isentropic lift and the low level jet would help fuel these storms, but if any do develop, expect them to be non-severe due to weak shear/instability present. Mixing will once again lead to warmer temperatures with highs expected to reach the upper 80s to low 90s.
UPDATED THE FORECAST TO BUMP UP DEWPTS A BIT AS LIGHT ADVECTION OF SLIGHTLY MORE MOIST AIR HAS RESULTED IN DEWPTS MAINLY IN THE LOW TO MID 50S OVER CENTRAL KY. THE SYNOPTIC WEATHER PATTERN FEATURES AN AMPLIFYING RIDGE ACROSS MUCH OF THE EASTERN CONUS. WITH AN UPSTREAM TROUGH OVER THE WESTERN UNITED STATES. OVERNIGHT LOWS TONIGHT WILL BE A BIT WARMER THAN IN PAST NIGHTS GIVEN THE SLIGHTLY WARMER AIRMASS AND A WEAK SSW WIND. WEDNESDAY WILL BE A DEGREE OR TWO WARMER TODAY AS LOW- LEVEL THICKNESSES SLOWLY INCREASE. HIGHS WILL BE IN THE LOW TO MID 80S UNDER FULL SUNSHINE.
954 PM EDT TUE SEP 15 2015 A STRONG RIDGE OF HIGH PRESSURE ANCHORED ALONG THE EAST COAST WILL BRING WARM AND DRY WEATHER THROUGH THE END OF THE WEEK. THIS STRONG RIDGING IS LEADING TO PLENTY OF SUBSIDENCE AND MOSTLY CLEAR SKIES. RIDGE WILL CONTINUE TO MOVE EAST OVER THE NEXT 24 HOURS. WITH THE RIDGE AXIS POSITIONED OVER THE STATE BY TOMORROW AFTERNOON. A STRONG, WARM RIDGE OF HIGH PRESSURE ANCHORED ALONG THE EAST COAST WILL BRING VERY WARM MIDSUMMER LIKE WEATHER THROUGH THE END OF THIS WEEK.
The low clouds will burn off by late Wednesday morning and return to VFR across the area for the afternoon and evening. The low clouds will burn off by late Wednesday morning and return to VFR across the area. This will help keep temps a bit warmer than what we saw this morning, with forecast lows generally in the upper 60s to lower 70s. Southerly winds will increase to 10-15 mph with afternoon highs once again in the low to mid 90s. Upper high pressure continues to dominate the weather picture for West Central Texas with dry weather continuing through the end of the week.
THIS ACTIVITY IS EXPECTED TO REMAIN ACROSS THE NORTHERN CWA TONIGHT CLOSER TO AN UPPER LEVEL SHORT WAVE TROUGH THAT WILL BE MOVING FROM THE SOUTHERN ROCKIES INTO THE PLAINS. AN UPPER LEVEL TROUGH WILL BE FOUND OVER THE NORTHWEST QUARTER OF THE U. AND AN UPPER LEVEL RIDGE WILL BE FOUND FROM NORTHERN MEXICO INTO THE NORTHEAST U.
COOLER TEMPERATURES AND RAINFALL REMAINS ON TRACK TO IMPACT THE SAN FRANCISCO BAY AREA ON WEDNESDAY. THE CURRENT SATELLITE WATER VAPOUR IMAGE IS SHOWING A TROUGH OF LOW PRESSURE POSITIONED OVER THE WEST COAST WITH A DEVELOPING LOW PRESSURE SYSTEM CENTERED APPROXIMATELY 430 MILES OFF OF THE OREGON COAST.
817 PM EDT TUE SEP 15 2015 A STRONG RIDGE OF HIGH PRESSURE AT THE SURFACE AND ALOFT WILL REMAIN OVER THE NORTH COUNTRY THROUGH THE REMAINDER OF THIS WEEK.
THE 00Z KDVN SOUNDING WAS VERY DRY IN THE LOW LEVELS OF THE ATMOSPHERE SO MUCH OF THIS PRECIPITATION WAS NOT REACHING THE GROUND. AFTER LOWS IN THE LOWER 60S TONIGHT TEMPERATURES WILL REBOUND INTO THE MIDDLE 80S BY WEDNESDAY AFTN.
SURFACE WINDS WILL DIMINISH TONIGHT THEN BECOME NORTHERLY WEDNESDAY AS LOW PRESSURE DEEPENS OVER SE MT AND WY.
750 PM EDT TUE SEP 15 2015 A STRONG RIDGE OF HIGH PRESSURE AT THE SURFACE AND ALOFT WILL REMAIN OVER THE NORTH COUNTRY THROUGH THE REMAINDER OF THIS WEEK.
920 PM PDT TUE SEP 15 2015 A LOW PRESSURE TROUGH WILL LINGER OVER THE WEST COAST THROUGH WEDNESDAY BEFORE GIVING WAY TO HIGH PRESSURE FOR THE LATTER HALF OF THE WEEK. ABUNDANT MOISTURE IN THE TROUGH WILL CONTINUE AREAS OF CLOUDS AND A CHANCE OF SHOWERS INTO WEDNESDAY MORNING. THEN AS THE TROUGH WEAKENS. AND WERE 3-5 MBS TO THE LOWER DESERTS. ESPECIALLY ALONG THE HIGHER COASTAL TERRAIN. THE BROAD LOW PRESSURE TROUGH COVERING THE WEST THIS EVENING WILL LIFT NE THROUGH FRI. THE HIGH WILL KEEP IT QUITE WARM OVER SOCAL AND REOPEN THE MONSOONAL DOOR FOR A POSSIBLE RETURN OF SHWRS/TSTMS BY MIDWEEK.
AN UPPER LEVEL TROUGH WILL KEEP A COOL AND UNSETTLED AIR MASS OVER THE REGION TONIGHT AND WEDNESDAY. A STRONGER LOW PRESSURE SYSTEM WILL SPREAD RAIN TO WESTERN WASHINGTON WEDNESDAY NIGHT.
Cooler temperatures will continue through Wednesday then gradual warming into the weekend. A series of low pressure systems has begun to move through Northern California. This has allowed for continued cloud cover and cooler temperatures across the area.
THE DISTURBANCE MOVING THROUGH NOW WILL SHIFT EAST INTO AN OPEN WAVE AND WILL GIVE US NE FLOW WITH HIGH PRESSURE BUILDING IN NORTH OF THE AREA.
HIGH PRESSURE CONTINUES TO BE THE MAIN INFLUENCE ON THE WEATHER PATTERN FOR THE NEXT SEVERAL DAYS AS TEMPERATURES GRADUALLY WARM THROUGH THE WEEK. SUPERB RADIATIONAL CONDITIONS ARE ON TAP AGAIN TONIGHT WITH DRY HIGH PRESSURE OVERHEAD. DRY RIDGE CONTINUES TO EDGE DOWN THE SOUTH ATLANTIC COAST THROUGH THE PERIOD. GIVING US HIGHS PRETTY UNIFORMLY IN THE LOWER 80S ACROSS THE AREA.