Aikyam-Lab/Synoptic-Bench huggingface dataset:
TODAY THROUGH SUNDAY NIGHT CURRENT SURFACE ANALYSIS SHOWS COLD FRONT FROM WESTERN ND TO SOUTHEAST MT TO NORTHWEST WY. UPPER LEVEL ANALYSIS SHOWS A TROF SOUTHEAST OF THE AREA. COLD FRONT WILL SLOWLY MOVE INTO THE AREA THIS MORNING AND STALL OUT TO THE EAST OF THE BLACK HILLS THIS AFTERNOON.
THESE BANDS ARE ASSOCIATED WITH SEVERAL NARROW FRONTOGENETIC BANDS THAT EXTEND FROM 900 TO 700 MB WHICH ARE MOVING NORTH AHEAD OF A SHORT WAVE TROUGH THAT IS EJECTING OUT OF SOUTHEAST NEBRASKA. THE MODELS ARE IN GOOD AGREEMENT THAT THE SHORT WAVE TROUGH WILL EJECT NORTHEAST ACROSS THE FORECAST AREA. THE MODELS SHOW THAT THE SHORT WAVE TROUGH. A SHORT WAVE TROUGH.
936 AM EST SUN JAN 10 2016 STRONG LOW PRESSURE WILL TRACK NORTHEAST OF THE AREA THIS MORNING. HIGH PRESSURE WILL BUILD INTO THE REGION TONIGHT INTO MONDAY.
CLOSED LOW PRESSURE WAS CENTERED OVER WESTERN PORTIONS OF THE HUDSON BAY OF CANADA. SOUTH OF THIS LOW. A TROUGH EXTENDED SOUTH INTO THE OZARKS AND CENTRAL GULF COAST STATES. RIDGING WAS PRESENT ACROSS THE CANADIAN MARITIMES INTO LABRADOR NEWFOUNDLAND AND NORTH TO SRN GREENLAND. WEST OF THE TROUGH. A RIDGE OF HIGH PRESSURE EXTENDED FROM OFF THE WEST COAST OF OREGON. COLD ARCTIC HIGH PRESSURE HAS PUSHED INTO EASTERN NEBRASKA OVERNIGHT AND AS OF 2 AM CST. ANOTHER AREA OF "WARMER" TEMPERATURES WAS LOCATED IN THE EASTERN NEBRASKA PANHANDLE AND FAR SWRN NEBRASKA. HIGH PRESSURE WILL SLIDE SOUTH SOUTHEAST INTO EASTERN KANSAS. WHICH WILL ALLOW WARMER AIR ACROSS THE HIGH PLAINS. A WARM FRONT WILL BRING HIGHER TEMPERATURES TO CENTRAL AND WESTERN NEBRASKA MONDAY.
COLD CANADIAN HIGH PRESSURE WILL CONTINUE TO BUILD SOUTH IN THE WAKE OF THE COLD FRONT THAT PUSHED THROUGH THE AREA YESTERDAY. WITH ROUGHLY 6 HRS OR SO OF BELOW FREEZING TEMPERATURES. THIS FEATURE WILL INDUCE A WEAK WRN GULF COASTAL TROUGH MONDAY NIGHT AND WILL BE ACCOMPANIED BY DECENT LIFT.
Early morning temperatures are currently in the middle to lower teens, and will continue to drop into the single digits above zero to the lower teens this morning. The low that brought snow to portions of the region is spreading off to the east. A pressure gradient remains in place between the high and low with breezy conditions still occurring. Winds will weaken today but will not go calm as the high stays to the west. Winds will be more relaxed tonight but a southerly breeze will start to return early Monday morning and allow wind chills to drop into the single digits above to the lower teens.
A COLD FRONT IS ENTERING NORTH-CENTRAL FL. A SLOWER FALL IS FORECAST ALONG THE LOWER ALTAMAHA.
AREAS OF FREEZING FOG CURRENTLY DEVELOPING IN THE PECOS RIVER VALLEY NEAR KROW AND MAY IMPACT THE TERMINAL THROUGH 16Z. BATCHES OF HIGH CLOUDS ARE ALSO CREEPING IN FROM THE WEST AHEAD OF THE APPROACHING SHORT WAVE TROUGH. WHILE SOME SATURATION WILL ACCOMPANY THIS FEATURE IN THE LOW TO MID LAYERS OF THE TROPOSPHERE. ONLY A 1-3 INCH ACCUMULATION RANGE HAS BEEN BUILT INTO THE FORECAST FOR THE HIGHER TERRAIN OF WESTERN TO SOUTHERN ZONES TODAY AND TONIGHT. IN FACT THE LOWEST READINGS OF THE SEASON MIGHT BE REACHED IN SOME LOCATIONS OF THE FORECAST AREA EARLY MONDAY MORNING.
935 AM EST SUN JAN 10 2016 COLD FRONT AS OF MID-MORNING LOCATED NEAR A ST. SFC WINDS WILL BECOME MORE SW-W AS THE DAY PROGRESSES WHICH WILL CUT DOWN ON THE HELICITY BUT INSTABILITY WILL LIKELY INCREASE SOME AS A SFC THETA-E RIDGE WILL EXTEND ACROSS MIAMI-DADE AND BROWARD COUNTIES THIS AFTERNOON. A COLD FRONT WILL MOVE ACROSS SOUTH FL LATE THIS AFTERNOON INTO THIS EARLY THIS EVENING. 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.
548 AM CST SUN JAN 10 2016 Fairly amplified pattern over North America early this morning as a deep upper level trough extends from a low over Hudson's Bay southward into the northern Mississippi Valley and Midwest. An upper level ridge was situated along the west coast with northwesterly flow in between over the central CONUS.
647 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.
957 AM EST SUN JAN 10 2016 COLD FRONT IS PUSHING THROUGH THE SOUTHERN ZONES THIS MORNING WITH A FEW SHOWERS LINGERING ACROSS THE AREA. HIGH PRESSURE WILL BE BUILDING IN AT THE SURFACE BEHIND THE FRONT WITH SOME COOLER AND DRIER AIR MOVING IN. THE UPPER TROUGH WILL SWING THROUGH TO THE NORTH LATER THIS AFTERNOON/EVENING.
DENSE FREEZING FOG ACROSS PARTS OF THE AREA WILL PERSIST LONGEST ACROSS THE LOWER TREASURE VALLEY AND WEISER BASIN SO A DENSE FOG ADVISORY WAS ISSUED THROUGH 11 AM MST.
HOWEVER WITHIN THE PAST 60-90 MINS DRIER AIR HAS BEGUN TO MOVE DOWN THE LEE SLOPE OF THE FRONT RANGE AND OFF THE CHEYENNE RIDGE WHICH HAS BEGUN TO ERODE/DISSIPATE THE WESTERN AND NORTHERN EDGES OF THE DENSE FOG BANK CLEARLY EVIDENT ON 11U-3. THESE SAME CONDITIONS WILL COMBINE WITH A SWIFT NORTHWEST FLOW ALOFT TO PRODUCE GUSTY WEST- NORTHWEST WINDS ON THE RIDGES AND EAST SLOPES OF THE FRONT RANGE MTNS TODAY AND OVERNIGHT. TEMPERATURES TODAY ABOUT 4-7 DEG F WARMER THAN YESTERDAY.
A COLD FRONT WILL MOVE ACROSS SOUTH FL LATE THIS AFTERNOON INTO THIS EARLY THIS EVENING. 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.
HIGH TEMPERATURES WILL STRUGGLE TO WARM ABOVE FREEZING ACROSS NORTHERN ARKANSAS. HIGH PRESSURE WILL BE CENTERED OVER ARKANSAS AND THE UPPER TROUGH WILL LIFT OUT OF THE REGION RESULTING IN NEAR ZONAL FLOW ALOFT.
AS THIS RIDGE MOVES EASTWARD. 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.
COULD BE SOME SPOTTY LIGHT SNOW SHOWERS OVER THE HIGHER TERRAIN TODAY INTO THIS EVENING.
AS THE WINDS CUT-OFF STRONG RADIATIONAL COOLING WILL DEVELOP AND THIS WILL ALLOW TEMPERATURES TO FALL INTO THE LOW/MID 20S ACROSS THE AREA. HIGH PRESSURE WILL CONTINUE MONDAY NIGHT WITH ANOTHER COLD NIGHT ON TAP.
A WEAK STORM SYSTEM WILL BRING MORE LIGHT SNOW TO THE HIGH COUNTRY TODAY.
SLIGHTLY WARMER AIR OUT WEST WILL ALLOW TEMPS TO RISE INTO THE TEENS OVER CENTRAL SD.
DEEPER UPPER TROUGHING HAS OVERTAKEN THE AREA WITH THE FIRST TRUE ARCTIC AIRMASS NOW WELL ENTRENCHED EARLY THIS MORNING. REACHING TO ADVISORY LEVELS FOR MUCH OF THE CWA COURTESY OF GUSTIER NORTHWEST WINDS WITHIN A DECENT GRADIENT BETWEEN LOW PRESSURE DEEPENING OVER THE EASTERN LAKES AND HIGH PRESSURE WORKING THROUGH THE PLAINS STATES. AS LOW LEVEL RIDGING CONTINUES TO FOLD EAST AND PUNT SOME EVEN DRIER AIR EAST AS IT DOES SO. WITH THE RIDGE AXIS ESSENTIALLY FOLDING OVERHEAD.
FORECAST CONFIDENCE IS ON THE LOWER SIDE WHETHER LOW CIGS WILL PERSIST OVERNIGHT OR SCATTER OUT. 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.
414 AM CST SUN JAN 10 2016 NORTH-TO-SOUTH SURFACE PRESSURE RIDGE WAS FOUND MAKING STEADY PROGRESS OFF THE CAPROCK EARLY THIS MORNING. WINDS ALOFT WILL UNDERGO BACKING FROM NW-SW IN ADVANCE OF A POSITIVE TILT TROUGH OVER YOSEMITE AT 3 AM. HEALTHY STREAM OF UPPER PACIFIC MOISTURE/CLOUDS WILL TAKE AIM ON THE LOCAL AREA BY SUNSET AND PROCEED TO DEEPEN OVERNIGHT AS THE TROUGH DRAWS CLOSER. WITH THE TROUGH AXIS ALMOST SOUTHEAST OF THE FORECAST AREA BY 18Z MONDAY.
A FEW LOWER CLOUDS TRAPPED IN THE LOW LEVEL BAROCLINIC ZONE HUGGING THE EXTREME SOUTHWESTERN BORDER OF THE CWA. WITH JUST A FEW MENTIONED FOR A FEW MORNING HOURS IN THE LOWER BRULE AREA. AND PERHAPS SOME LOWER LEVEL CLOUD REDEVELOPMENT IN THE LOWER LEVEL BAROCLINIC ZONE AS IT SHIFTS EASTWARD OVER THE CWA. A TOUCH WARMER WEST OF THE JAMES RIVER.
SURFACE RIDGING TO CONTINUE ACROSS THE AREA TODAY. BLUSTERY NW WINDS BEHIND LOW PASSAGE WITH STRONGEST WINDS EXPECTED OVER THE HIGHER TERRAIN -SN WILL DIMINISH EXITING THE EASTERN FA BY MIDNIGHT.
WENT SLIGHTLY COOLER FOR TEMPERATURES ACROSS THE NORTHEAST AS WELL TO COINCIDE WITH THE WINDS REMAINING STRONGER THROUGH THE MORNING.
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.
1000 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. LATEST RADAR/OBS/SAT SHOW THE APPROACHING COLD FRONT NOW INTO CENTRAL OHIO WITH STRONG WEST/NORTHWESTERLY WINDS BEHIND THE FRONT. 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.
WV Imagery indicates a broad upper level trough of low pressure transitioning eastward across the Upper Midwest and the Great Lakes Region. Near the surface, an area of high pressure is sinking southward across eastern and central Kansas. Fairly amplified pattern over North America early this morning as a deep upper level trough extends from a low over Hudson's Bay southward into the northern Mississippi Valley and Midwest. An upper level ridge was situated along the west coast with northwesterly flow in between over the central CONUS.
/ISSUED 414 AM CST SUN JAN 10 2016/ NORTH-TO-SOUTH SURFACE PRESSURE RIDGE WAS FOUND MAKING STEADY PROGRESS OFF THE CAPROCK EARLY THIS MORNING. WINDS ALOFT WILL UNDERGO BACKING FROM NW-SW IN ADVANCE OF A POSITIVE TILT TROUGH OVER YOSEMITE AT 3 AM. HEALTHY STREAM OF UPPER PACIFIC MOISTURE/CLOUDS WILL TAKE AIM ON THE LOCAL AREA BY SUNSET AND PROCEED TO DEEPEN OVERNIGHT AS THE TROUGH DRAWS CLOSER. WITH THE TROUGH AXIS ALMOST SOUTHEAST OF THE FORECAST AREA BY 18Z MONDAY.
636 AM EST SUN JAN 10 2016 STRONG LOW PRESSURE WILL TRACK NORTHEAST OF THE AREA THIS MORNING. HIGH PRESSURE WILL BUILD INTO THE REGION TONIGHT INTO MONDAY.
/issued 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.
AN UPPER LEVEL TROUGH OVER CENTRAL CANADA AND THE UPPER MIDWEST WILL SHIFT EAST THROUGH ONTARIO AND THE GREAT LAKES TODAY AND TONIGHT. IT COULD BE COLDER IF THE HIGH CLOUD COVER HOLDS OFF TILL AROUND DAWN OR LATER. PARTS OF THE HIGHER TERRAIN ALONG THE NORTH SHORE WILL BE MORE EXPOSED TO THE LIGHT WIND. THE NORTHLANDS WEATHER WILL BE DOMINATED BY A LARGE UPPER LOW CENTERED OVER THE HUDSON BAY AREA FOR THE FIRST HALF OF THE WEEK. THIS LOW WILL KEEP COLD NORTHERLY AND CYCLONIC FLOW OVER THE NORTHLAND. THIS MEANS CONTINUED COLD AND OCCASIONAL SNOW AS EMBEDDED S/WVS ROTATE THROUGH THE UPPER TROUGH.
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.
430 AM CST SUN JAN 10 2016 TEMPERATURES AT 4 AM RANGE FROM THE MID TO UPPER 30S INLAND TO THE LOWER 40S NEAR AND ALONG THE COAST. WENT AHEAD AND STUCK CLOSE TO OUR PREVIOUS NUMBERS THAT RANGE FROM THE UPPER 20S TO AROUND 30 WELL INLAND TO THE LOWER 40S AT THE COAST.
426 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.
TEMPERATURES ACROSS THE ARKLATEX FORECAST TO CLIMB ONLY IN THE LOWER TO MIDDLE 40S THIS AFTERNOON. A FAIRLY BENIGN FORECAST EXPECTED THROUGH MOST OF THE WORK WEEK WITH NEAR FREEZING LOW TEMPERATURES AND HIGHS IN THE 40S AND 50S EACH DAY.
TEMPERATURES CONTINUE TO FALL BEHIND A COLD FRONT AND 850 MB COLD ADVECTION. A DUSTING TO ONE INCH ACCUMULATION MAY BE POSSIBLE IN THE HIGHER TERRAIN.
EXPECT VFR CONDITIONS TO PREVAIL TODAY THROUGH THIS EVENING AS HIGH PRESSURE PREVAILS ACROSS THE SOUTH CENTRAL UNITED STATES THIS AFTERNOON. AS A RESULT A MORE EAST TO SOUTHEAST FLOW RETURN IN THE LOWER LEVELS INCREASING LOWER LEVEL MOISTURE TONIGHT INTO MONDAY ACROSS DEEP S TEXAS. LEAN TOWARDS THE WARMER MAV GUIDANCE FOR MONDAY MORNING LOW TEMPS AS CLOUD COVER WILL LIMIT TEMPS TO REACH THE LOW 40S. AS THIS TROUGH MOVES CLOSER TO THE REGION. COASTAL TROUGH GRADUALLY DEVELOPS INCREASING THE POTENTIAL FOR RAIN SHOWERS/DRIZZLE ALONG THE LOWER TEXAS COAST.
COLD HIGH PRESSURE HAD SETTLED SOUTHWARD THE PAST 24 HOURS AND AT 09Z STRETCHED FROM ND TO TX. THIS WILL SLIDE OFF TO THE SOUTHEAST WHILE LOW PRESSURE OVER NERN WY PUSHES EAST ACROSS SD TODAY. ALLOWING WARMER AIR TO START TO MOVE INTO THE AREA.
315 AM MST SUN JAN 10 2016 A RIDGE OF HIGH PRESSURE WILL BUILD ONTO THE LEFT COAST THIS MORNING AND LOOKS TO BE THE DOMINANT WEATHER FEATURE. THIS MORNING THE FIRST OF THESE DISTURBANCES WAS DIGGING DOWN THE EAST SIDE OF THE RIDGE THROUGH THE GREAT BASIN. THE RIDGE BUILDS INTO THE GREAT BASIN. HIGH PRESSURE WILL CONTINUE TO DOMINATE THE REGION THROUGH MIDWEEK. UNDER THIS RIDGE TEMPERATURES WILL WARM SLIGHTY IN THE HIGHER ELEVATIONS WHEREAS THE VALLEY LOCATIONS WILL NOT SEE MUCH VARIANCE FROM DAY TO DAY AS COLDER AIR REMAINS TRAPPED UNDER STRONG INVERSIONS.
/ISSUED 430 AM CST SUN JAN 10 2016/ TEMPERATURES AT 4 AM RANGE FROM THE MID TO UPPER 30S INLAND TO THE LOWER 40S NEAR AND ALONG THE COAST. WENT AHEAD AND STUCK CLOSE TO OUR PREVIOUS NUMBERS THAT RANGE FROM THE UPPER 20S TO AROUND 30 WELL INLAND TO THE LOWER 40S AT THE COAST.
/ISSUED 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.
436 AM MST SUN JAN 10 2016 A RIDGE OF HIGH PRESSURE WILL BUILD ONTO THE LEFT COAST THIS MORNING AND LOOKS TO BE THE DOMINANT WEATHER FEATURE. THIS MORNING THE FIRST OF THESE DISTURBANCES WAS DIGGING DOWN THE EAST SIDE OF THE RIDGE THROUGH THE GREAT BASIN. THE RIDGE BUILDS INTO THE GREAT BASIN. HIGH PRESSURE WILL CONTINUE TO DOMINATE THE REGION THROUGH MIDWEEK. UNDER THIS RIDGE TEMPERATURES WILL WARM SLIGHTY IN THE HIGHER ELEVATIONS WHEREAS THE VALLEY LOCATIONS WILL NOT SEE MUCH VARIANCE FROM DAY TO DAY AS COLDER AIR REMAINS TRAPPED UNDER STRONG INVERSIONS.
537 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.
1010 AM EST SUN JAN 10 2016 A COLD FRONT WAS MOVING OFFSHORE THIS MORNING WITH BREEZY CONDITIONS IN ITS WAKE. HIGH PRESSURE OVER THE CENTRAL CONUS WILL GRADUALLY BUILD EAST INTO THE REGION THROUGH MONDAY.
624 AM EST SUN JAN 10 2016 A COLD FRONT WILL CROSS THE FORECAST AREA THIS MORNING. 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 THIS MORNING DRAGGING A COLD FRONT ACROSS THE FORECAST AREA. CLOUD COVER WILL DIMINISH 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. DRY WEATHER ON MONDAY UNDER HIGH PRESSURE.
06Z SFC DATA HAS LOW PRESSURE OVER THE OHIO VALLEY WITH A STRONG ARCTIC HIGH OVER THE PLAINS. LATE TONIGHT AS THE LOW APPROACHES. FOLLOWED BY ANOTHER COLD FRONT.
A TROF WILL MOVE IN OFF THE PAC LATE WED AND FORCE THE WRN USA RIDGE OVER THE PLAINS FRI. A LONGWAVE TROF IS THEN FCST TO DEVELOP OVER THE CNTRL USA SAT-SUN. BUT THE TROF WILL BE SPLIT WITH A NRN AND SRN BRANCH AND NUMEROUS EMBEDDED SHORTER WAVELENGTH TROFS. SUBSTANTIAL SPREAD DEVELOPS AS THEY DIVERGE IN THEIR HANDLING THE TEMPORARY BREAKDOWN OF THE WRN RIDGE AND THE TROF MOVING ONSHORE FROM THE PAC. ITS COLD FRONT WILL DIVE THRU HERE MON NIGHT WITH HIGH PRES TO QUICKLY FOLLOW TUE. AS THIS HIGH DEPARTS. BUT EASTWARD MOVEMENT OF THE UPR TROF WILL KEEP THE CORE OF THE COLD E OF THE FCST AREA. SO ITS TRAILING COLD FRONT WILL REMAIN QUASI-STATIONARY FROM NW-SE OVER OR NEAR THE FCST AREA INTO THU. MON NIGHT: ARCTIC COLD FRONTAL PASSAGE.
SHORT TERM: (Through Late This Afternoon) Deep longwave upper TROF dominates the MS river valley this morning with the center of an Arctic high pressure over eastern Nebraska.
SW FLOW INCREASING AHEAD OF A COLD FRONT WHICH WILL CROSS THE LOCAL WATERS DURING THE DAY. BUT WINDS WILL INCREASE OUT THE W/NW BEHIND THE FRONT AND CONTINUE INTO TONIGHT AS HIGH PRESSURE OVER THE DEEP SOUTH BUILDS OVER THE AREA. DRIER AIR WILL BEGIN TO FILTER INTO NORTHERN SECTIONS THIS AFTERNOON BEHIND A STRONG COLD FRONT.
WILL SLIDE SLOWLY SOUTHEAST TO THE LOWER MISSISSIPPI VALLEY BY TONIGHT. WHILE HIGHS FROM THE MID 20S TO NEAR FREEZING ARE EXPECTED EAST OF HIGHWAY 14 WHERE MIXING WILL BE SLIGHT TO NIL.
HIGH PRESSURE RIDGING BUILDING IN FROM THE PACIFIC NORTHWEST COAST WILL ALLOW HEIGHTS TO BEGIN TO RISE THROUGH MONDAY. ALTHOUGH NOT A TRUE LEE-SIDE TROUGH DEVELOPS. TEMPERATURES MONDAY ARE EXPECTED TO BE A FEW DEGREES WARMER THAN TODAY WITH READINGS IN THE MIDDLE TO UPPER 20S ACROSS THE FAR EAST TO MIDDLE 30S ALONG THE WESTERN FOOTHILLS. MODEL CONSENSUS IS THAT STRONG WEST COAST RIDGE WILL IMPEDED ANY STRONG PACIFIC SYSTEMS FROM IMPACTING THE AREA. WHILE OUR AREA WILL BE ON THE EASTERN NORTHERLY FLOW SIDE OF THE RIDGE ALLOWING OCCASIONAL COLD CANADIAN AIR INTRUSIONS BY THE END OF THE WEEK.
Dry weather expected across the region today, then another weak system dents the ridge on Monday and may bring some light precipitation.
OVERALL CONUS PATTERN IS CHARACTERIZED BY A LARGE LONGWAVE TROUGH OVER THE CENTRAL PLAINS WITH SOUTH-CENTRAL TEXAS AT THE DRY SOUTHERN BASE OF IT.
1005 AM EST SUN JAN 10 2016 A COLD FRONT WAS MOVING OFFSHORE THIS MORNING WITH BREEZY CONDITIONS IN ITS WAKE. HIGH PRESSURE OVER THE CENTRAL CONUS WILL GRADUALLY BUILD EAST INTO THE REGION THROUGH MONDAY.
HIGH PRESSURE BUILDING OVER THE PACIFIC NORTHWEST WILL KEEP CONDITIONS DRY TODAY.
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.
AN UPPER LEVEL LOW MOVING DOWN FROM THE NORTH WILL BRING SOME RAIN FRIDAY AFTERNOON OR FRIDAY NIGHT.
617 AM CDT THU OCT 1 2015 A large area of high pressure to our north has brought a rather chilly start to the new month as temperatures have dipped into the lower 40s over our northern counties as of 200 am. An upper level low situated over extreme southern IL this morning will drift southeast with additional energy forecast to move into the base of the trof later today helping to intensify the upper low. 00Z forecast models continue to deepen upper level trof over the lower TN/OH river valleys southward into a cutoff low over AL and FL panhandle Thu night into Friday. This trough will influence the track of major hurricane Joaquin with winds up to 120 mph and near the eastern Bahamas.
/ISSUED 239 AM CDT THU OCT 1 2015/ CANADIAN HIGH PRESSURE TO BUILD SOUTH ACROSS THE REGION TODAY ALLOWING FOR WINDY CONDITIONS ACROSS SOME AREAS ALONG WITH MUCH COOLER TEMPERATURES. HIGH TEMPERATURES TODAY TO CLIMB INTO THE LOWER TO MID 80S. ENHANCED PRESSURE GRADIENT ASSOCIATED WITH BUILDING HIGH PRESSURE TO ALLOW FOR WINDS TO INCREASE TO AROUND 20 MPH WITH HIGHER GUSTS LATER TODAY.
549 AM MDT THU OCT 1 2015 PREDAWN WATER VAPOR LOOP REVEALED UPPER LEVEL TROUGHS FROM THE GREAT WITH A UPPER LEVEL RIDGE AXIS FROM THE FOUR CORNERS INTO THE NORTHERN ROCKIES. AREAS OF FOG/PATCHY DRIZZLE DEVELOPED OVER THE HIGH PLAINS UNDER A MOIST SOUTHEASTERLY LOW LEVEL FLOW. THERE IS GOOD MODEL AGREEMENT THROUGH THE SHORT TERM WITH THE UPPER LEVEL RIDGE TRANSLATING EAST ACROSS THE FRONT RANGE AND HIGH PLAINS DURING THE NEXT 24 HOURS. WITH A RIDGE CENTERED OVER SOUTH CENTRAL CO. THE PRESSURE GRADIENT BETWEEN THE FRONT AND A STRONGER RIDGE TO THE EAST WILL YIELD RATHER GUSTY SOUTHEAST WINDS OVER THE HIGH PLAINS BEGINNING THIS AFTERNOON. AS THE UPPER LEVEL TROUGH APPROACHES WY TONIGHT AND FRIDAY.
THEN NORTH TO NORTHWEST THIS AFTERNOON AS THE UPPER LOW OVER SOUTHERN CANADA RETROGRADES BACK TO THE NORTHWEST. THE SURFACE REFLECTION OF THE LOW LEVEL JET IN THE FORM OF A WARM FRONT EXTENDED FROM A LOW OVER CENTRAL WYOMING NORTHEASTWARD TOWARDS DICKINSON TO BETWEEN WILLISTON AND MINOT. SHORT TERM MODELS INDICATE ENHANCEMENT FROM SMALL-SCALE IMPULSES ROTATING AROUND THE UPPER LEVEL LOW SHOULD CONTINUE THROUGH THE MORNING. THE UPPER LEVEL LOW IS FORECAST TO LIFT NORTHWARD THIS AFTERNOON WITH IMPULSES WANING. TONIGHT ATTENTION TURNS TO OUR SOUTHWEST WHERE A LONGWAVE TROUGH OFF THE WEST COAST THIS MORNING MOVES INTO THE ROCKIES TONIGHT AND THE FIRST IN A SERIES OF UPPER LEVEL IMPULSES REACHES WESTERN NORTH DAKOTA LATE TONIGHT.
1229 PM EDT THU OCT 1 2015 HYDRO A VERY LARGE AND SLOW MOVING CANADIAN HIGH PRESSURE SYSTEM WILL REMAIN IN CONTROL OF SOUTHWEST MICHIGAN WEATHER THROUGH THIS COMING WEEKEND.
UPPER LEVEL TROUGH ON FRIDAY ACROSS THE ROCKIES. WITH WEAK RIDGING ACROSS THE SOUTHERN PLAINS. OVER THE WEEKEND THE NEXT LOW PRESSURE SYSTEM WILL DIG SOUTH ACROSS THE WESTERN CONUS. MEANWHILE THE TROUGH OVERHEAD WILL LIFT/WEAK OVER THE NORTHERN PLAINS AS RIDGE SHIFTS/STALLS OVER THE MISS RVR VALLEY.
THE 12Z FWD RAOB SHOWED A VERY DRY LAYER OF AIR LOCATED BELOW THIS HIGH BASED CONVECTION WHICH APPEARED TO BE DEEP AND DRY ENOUGH TO PREVENT MOST PRECIPITATION FROM REACHING THE SURFACE. A COLD FRONT WILL INVADE THIS EVENING BUT WITHOUT ANY CHANGE IN WIND DIRECTION. THIS PRECIPITATION WILL FALL FROM MID LEVEL CLOUDS AND GIVEN THE DRIER AIR IN THE LOWER LEVELS. LOWER DEWPOINTS WILL WORK THEIR WAY IN FROM THE NORTHEAST OVERNIGHT TONIGHT INTO FRIDAY AS A COLD FRONT MOVES THROUGH THE REGION. EXPECT IT TO REALLY FEEL LIKE AUTUMN THIS WEEKEND WITH DRY AND COOLER THAN NORMAL WEATHER.
CHATTANOOGA AIRPORT, TN 70 59 64 57 / 60 70 60 50 KNOXVILLE MCGHEE TYSON AIRPORT, TN 67 57 66 56 / 70 100 70 60 OAK RIDGE, TN 68 57 65 54 / 60 90 70 60 TRI CITIES AIRPORT, TN 65 55 66 54 / 80 100 70 80.