Aikyam-Lab/Synoptic-Bench huggingface dataset:
IN THE HIGH COUNTRY SHOULD WIND SPEEDS STEADILY INCREASING THIS MORNING AS THIS NORTH- SOUTH JET PASSES OVERHEAD THIS MORNING. SCATTERED SNOW SHOWERS IN THE HIGH COUNTRY NOW SHOULD GRADUALLY DIMINISH THROUGH THE DAY AS DRIER AIR ADVECTS IN BEHIND THE JET. TEMPERATURES TODAY WILL BE ONLY SLIGHTLY WARMER THAN YESTERDAY AS AS MUCH AS 10-14 DEGS F BELOW AVERAGE FOR THE DATE.
FURTHER TO THE SOUTH AND WEST /WHERE SIGNIFICANT ICING OCCURRED ALONG THE CENTRAL/SOUTHERN VALLEY AND PLATEAU/ THE SUBFREEZING TEMPERATURES WILL HELP TO REINFORCE ANY ICE/LIGHT SNOW PACK ON ROADS. CHATTANOOGA AIRPORT, TN 35 22 35 10 / 10 20 20 10 KNOXVILLE MCGHEE TYSON AIRPORT, TN 30 20 31 6 / 10 20 50 20 OAK RIDGE, TN 30 19 32 6 / 10 30 40 20 TRI CITIES AIRPORT, TN 26 18 28 4 / 10 20 60 40.
WITH LOWER STRATUS EXPECTED TO DEVELOP ONCE AGAIN LATE THIS EVENING AHEAD OF A REINFORCING COLD FRONT. NNW FLOW OF 5-10 KTS WILL BECOME LGT/VRBL BY THIS EVENING BEFORE INCREASING FROM THE WSW PRIOR TO ARRIVAL OF COLD FRONT. 70/DD /ISSUED 445 AM CST TUE FEB 17 2015/ PATCHY FREEZING DRIZZLE ASSOCIATED WITH THE LOW STRATUS WILL BE POSSIBLE THROUGH THE EARLY MORNING HOURS. TEMPERATURES THIS AFTERNOON ARE NOT EXPECTED TO MAKE IT MUCH ABOVE FREEZING WITH MANY AREAS ALONG THE TN BORDER REMAINING BELOW FREEZING TODAY. THIS WILL PREVENT THE LOW LEVEL AIR FROM MODIFYING/WARMING VERY MUCH AS IT TRAVELS SOUTH TOWARDS THE AREA.
HIGH PRESSURE ACROSS MUCH OF THE EASTERN HALF OF THE COUNTRY WILL SHIFT SOUTH INTO THE GULF OF MEXICO AS A STRONG LOW PRESSURE SYSTEM AND COLD FRONT MOVE INTO THE UPPER MIDWEST. THIS SHIFT OF THE RIDGE WILL KEEP MAINLY PLEASANT CONDITIONS ACROSS SOUTH TEXAS THROUGH THE SHORT TERM PERIOD. AS THE RIDGE SHIFTS FARTHER EAST WINDS SHOULD SHIFT MORE TO THE SOUTH. THEN HIGHS INTO THE LOWER 70S SATURDAY.
SFC FRONT/LOW WILL DRIVE AHEAD OF THE TROUGH. ASSOCIATED WITH THE LOW LEVEL THERMODYNAMICS-SFC FRONT. SIGNIFICANT TIGHTENING IN THE SFC PRESSURE GRADIENT TONIGHT INTO SATURDAY AS THE UPPER LEVEL TROUGH DROPS IN.
A RIDGE OVER THE WEST COAST WILL BRING NORTHWEST CALIFORNIA DRY WEATHER AND ABOVE NORMAL TEMPERATURES FOR THE NEXT FEW DAYS. A VERY TRANQUIL WEATHER PATTERN WILL CONTINUE FOR OUR AREA AS A RIDGE OF HIGH PRESSURE STAYS OVER THE WEST COAST FOR THE NEXT FEW DAYS.
331 AM PST FRI FEB 13 2015 HIGH PRESSURE ALOFT WILL CONTINUE TODAY WITH HIGH TEMPERATURES AROUND 10 TO LOCALLY 15 DEGREES ABOVE AVERAGE.
UPPER AIR ANALYSIS LAST EVENING SHOWED A LARGE AMPLITUDE TROUGH OVER THE EASTERN HALF OF THE COUNTRY WITH A CLOSED LOW SEPARATING FROM THE MAIN FLOW OVER NORTHWESTERN MEXICO. THE UPPER LOW WILL MOVE OUT INTO THE PACIFIC AND A RIDGE WILL BUILD FROM THE SOUTH OVER TEXAS.
457 AM CST FRI FEB 13 2015 WITH THE EXCEPTION OF A DRY COLD FRONTAL PASSAGE SATURDAY AFTERNOON AND NIGHT. WARMER TEMPERATURES ANTICIPATED TODAY. AND ACROSS MOST OF THE AREA SATURDAY EXCEPT THE CNTRL AND ERN OK PNHDL AND THE NERN TX PNHDL AS THE AFOREMENTIONED COLD FRONT SHOULD MAKE IT INTO THAT PART OF OUR FCST AREA SATURDAY AFTERNOON.
Forecast soundings dry out this as the upper trough continues drifting west. Also seen on satellite is an upper level low pressure system which has retrograded westward over northern Mexico to near the Gulf of California.
642 AM EST FRI FEB 13 2015 HIGH PRESSURE OVER ILLINOIS WILL MOVE OFF THE CAROLINA COAST TONIGHT.
A FEW CLOUDS WILL DEVELOP NEAR THE COAST THIS AFTERNOON AS A COASTAL TROUGH DEVELOPS. OTHERWISE SKIES WILL BE MOSTLY SUNNY WITH TEMPS STRUGGLING TO GET TO 50 DEGREES ACROSS SE GA AND GENERALLY IN THE LOWER TO MID 50S ACROSS NE FL EXCEPT UPPER 50S ACROSS THE FAR SOUTH. WINDS WILL GENERALLY BE LESS THAN 15 MPH TODAY AS HIGH PRESSURE DOMINATES BUT WINDS MAY APPROACH 15 MPH ON SATURDAY AS SOUTHWESTERLY WINDS INCREASE AHEAD OF THE NEXT COLD FRONT.
A GENERAL SOUTHWEST FLOW EXISTS DUE TO HIGH PRESSURE CENTERED OVER NEVADA EXTENDING WESTWARD TO OVER THE EASTERN-MOST PORTION OF THE PACIFIC OCEAN AT THE SURFACE. TONIGHT THROUGH SATURDAY REMNANTS OF A COLD FRONT WILL DRIFT SOUTHEASTWARD ON THE WEST SIDE.
LATEST MODEL ANALYSIS INDICATES THAT DEEP SOUTH TEXAS AND THE RGV WILL BE IN BETWEEN A DEEP UPPER LEVEL TROUGH ACROSS THE EASTERN U. AND A CUT OFF UPPER LOW OVER BAJA CALIFORNIA. THAT LEAVES THE CWA UNDER THE INFLUENCE OF A WEAK MID LEVEL HIGH PRESSURE RIDGE.
649 AM CST FRI FEB 13 2015 THE INITIAL COLD FRONT IS NOW ENTERING THE SOUTHERN VALLEY. THE FIRST COLD FRONT DURING THE DAY WILL BE RELATIVELY WEAK. THE GENERAL WEATHER WILL BE CLOUDS AND MAX TEMPERATURES ONLY 5F-10F WARMER THAN CURRENT VALUES. HIGH PRESSURE OVERHEAD ON SATURDAY.
1029 AM EST FRI FEB 13 2015 LOW PRESSURE WILL TRACK EAST OF NOVA SCOTIA TODAY WHILE HIGH PRESSURE BUILDS TOWARD THE REGION. HIGH PRESSURE WILL CROSS THE REGION TONIGHT THROUGH EARLY SATURDAY.
VFR CONDITIONS ARE EXPECTED FOR THE NEXT 18 HOURS AS HIGH PRESSURE DEVELOPS OVER THE NORTHWEST GULF.
EXPECT TEMPS IN THE 60S ACROSS THE PLAINS TODAY WITH GENERALLY MID 60S OVER THE LOWER ARK RVR VALLEY AND AOA 60 IN THE COS AREA.
PERSISTENT LIGHT SNOW HAS BEEN FALLING AHEAD OF THE APPROACHING COLD FRONT AND BOTH THE 13. 14Z RAP SHOW A SHORT WAVE TROUGH WILL PASS THROUGH NORTHERN WISCONSIN AS THE COLD FRONT COMES THROUGH. IN THE WARM SECTOR AHEAD OF THE COLD FRONT THERE SHOULD ALSO BE BETWEEN 2 AND 4 UBAR/S OF UP GLIDE ON THE 285K SURFACE. SFC FRONT/LOW WILL DRIVE AHEAD OF THE TROUGH. ASSOCIATED WITH THE LOW LEVEL THERMODYNAMICS-SFC FRONT. SIGNIFICANT TIGHTENING IN THE SFC PRESSURE GRADIENT TONIGHT INTO SATURDAY AS THE UPPER LEVEL TROUGH DROPS IN.
926 AM EST FRI FEB 13 2015 HIGH PRESSURE OVER ILLINOIS WILL MOVE OFF THE CAROLINA COAST TONIGHT.
STRONG HIGH PRESSURE ALOFT WILL MAINTAIN WARM AND DRY CONDITIONS TODAY. THIS HIGH PRESSURE WILL WEAKEN DURING THE WEEKEND.
EVEN WARMER ON SATURDAY AHEAD OF A STRONG COLD FRONT.
One wave diving south through eastern Missouri will generally dissipate as the axis of energy slides east into the ridge axis across Illinois, so mainly flurries are expected from that wave west of Jacksonville to Rushville early this morning. Tracking of a strong closed low continues to shift slightly east into the eastern Great Lakes, but the air mass is expansive enough that 850 mb temperatures of -20C to -23C are progged by the short range models over our area Saturday afternoon and evening. Steepening lapse rates immediately behind the cold front should allow for scattered snow showers to form, although any accumulations are expected to be less than half an inch.
A COLD FRONT WILL BRING SOME RAIN THIS AFTERNOON AND EVENING.
CHATTANOOGA AIRPORT, TN 40 23 52 15 / 0 0 10 10 KNOXVILLE MCGHEE TYSON AIRPORT, TN 36 21 46 11 / 0 0 20 20 OAK RIDGE, TN 37 20 46 11 / 0 0 20 20 TRI CITIES AIRPORT, TN 32 15 42 8 / 0 0 40 40.
606 AM EST FRI FEB 13 2015 HIGH PRESSURE OVER ILLINOIS WILL MOVE OFF THE CAROLINA COAST TONIGHT.
1045 AM EST FRI FEB 13 2015 A PRESSURE RIDGE EXTENDING THROUGH THE FORECAST AREA TODAY WILL BE SOUTH OF THE AREA TONIGHT. A REINFORCING COLD FRONT WILL APPROACH FROM THE NORTHWEST SATURDAY AND MOVE THROUGH THE AREA SATURDAY EVENING.
515 AM EST FRI FEB 13 2015 A PRESSURE RIDGE EXTENDING THROUGH THE FORECAST AREA TODAY WILL BE SOUTH OF THE AREA TONIGHT. A REINFORCING COLD FRONT WILL APPROACH FROM THE NORTHWEST SATURDAY AND MOVE THROUGH THE AREA SATURDAY EVENING.
06Z SFC ANALYSIS HAS HIGH PRESSURE FROM THE GREAT LAKES INTO THE LOWER MISSISSIPPI VALLEY. A WEAK LOW WAS NEAR K9V9 IN SOUTH DAKOTA WITH ASSOCIATED WARM AND COLD FRONTS FROM THE DAKOTAS INTO CENTRAL NEBRASKA. A VERY ISOLATED DUSTING OF ACCUMULATION MIGHT OCCUR IN THE HIGHWAY 20 CORRIDOR. NW UPPER LEVEL FLOW WITH PERIODIC REINFORCING ARCTIC COLD FRONTS TO KEEP BELOW NORMAL TEMPERATURES IN PLACE THROUGHOUT. COLD ADVECTION BEHIND THE ARCTIC COLD FRONT IS SHOWN PULLING DOWN -20 TO -24 C 850 MB TEMPERATURES INTO THE FORECAST AREA BY EVENING.
HIGH PRESSURE MOVING ACROSS THE AREA TODAY WILL KEEP US IN COOL NORTHERLY FLOW AND TEMPERATURES THIS AFTERNOON WILL STRUGGLE TO MAKE IT MUCH ABOVE 40 DEGREES. THE HIGH SHIFTS EAST FRIDAY NIGHT INTO SATURDAY AND WINDS BECOME MORE SOUTHERLY ON SATURDAY.
616 AM CST FRI FEB 13 2015 QUIET AND WARMER WEATHER TODAY WITH WEST NORTHWEST DOWNSLOPING FLOW WHICH SHOULD LEAD TO SIGNIFICANTLY MILDER TEMPS.
SOUTHWEST WINDS INCREASE EARLY SATURDAY MORNING IN THE LOWEST 2000 FEET. /ISSUED 457 AM CST FRI FEB 13 2015/ WITH THE EXCEPTION OF A DRY COLD FRONTAL PASSAGE SATURDAY AFTERNOON AND NIGHT. WARMER TEMPERATURES ANTICIPATED TODAY. AND ACROSS MOST OF THE AREA SATURDAY EXCEPT THE CNTRL AND ERN OK PNHDL AND THE NERN TX PNHDL AS THE AFOREMENTIONED COLD FRONT SHOULD MAKE IT INTO THAT PART OF OUR FCST AREA SATURDAY AFTERNOON.
As the ridge of high pressure begins to break down today, southerly winds will help mix out most valleys in western Montana and central Idaho, allowing daytime highs to warm quite nicely.
456 AM CST Fri Feb 13 2015 (Today and Tonight) Pretty quiet in the short term, with much much warmer temperatures this afternoon. With much warmer near surface temperatures, light downslope winds, and more sunshine, guidance forecast highs from the mid 60s to near 70 don't look unreasonable for later today. Loss of the cloudcover will actually set the stage for a little cooler conditions tonight, as a better radiational cooling set up develops. A few of the normal low lying spots will drop into the upper 30s while more areas remain in the lower 40s.
702 AM EST FRI FEB 13 2015 LOW PRESSURE WILL TRACK EAST OF NOVA SCOTIA TODAY WHILE HIGH PRESSURE BUILDS TOWARD THE REGION. HIGH PRESSURE WILL CROSS THE REGION TONIGHT THROUGH EARLY SATURDAY.
/ISSUED 316 AM CST FRI FEB 13 2015/ HIGH PRESSURE OVER THE AREA TODAY WILL SLIP SOUTH AND EAST OF OUR AREA AS A FAST MOVING CLIPPER TAKES A SOUTHEASTWARD DIVE FROM SOUTHERN CANADA.
611 AM EST FRI FEB 13 2015 A PRESSURE RIDGE EXTENDING THROUGH THE FORECAST AREA TODAY WILL BE SOUTH OF THE AREA TONIGHT. A REINFORCING COLD FRONT WILL APPROACH FROM THE NORTHWEST SATURDAY AND MOVE THROUGH THE AREA SATURDAY EVENING.
ARCTIC HIGH PRESSURE IS DEPARTING OFF TO THE EAST THOUGH RIDGING REMAINS EXTENDED INTO NORTHEAST IOWA.
THIS LOW AND TROUGH IS FORECAST TO SLOWLY DRIFT NORTH THIS AFTERNOON WITH MAIN AREA OF WARM AIR EXPECTED TO REMAIN ALONG AND JUST OFFSHORE.
150 PM MST SAT FEB 28 2015 COLD CONDITIONS ACROSS THE TRI STATE REGION THIS MORNING AS TEMPERATURES RANGE IN THE LOW TEENS AND SINGLE NUMBERS UNDER MAINLY CLOUDY SKIES. WITH MODELS ONLY CARRYING A WEAK 700MB TROUGH ACROSS THE AREA. FOLLOWED BY WEAK MID LEVEL RIDGING GOING INTO THE EVENING HRS. WHICH WILL BE CLOSER TO MAIN TROUGH DYNAMICS AS IT PASSES. ALTHOUGH A WEAK 500 MB RIDGE WILL DEVELOP OVER THE HIGH PLAINS EARLY IN THE PERIOD AS A WEST COAST TROUGH DEEPENS OFF SOUTHERN CALIFORNIA. A SERIES OF WEAK SHORT WAVE TROUGHS WILL MOVE ACROSS THE AREA.
/ISSUED 1051 AM CST SAT FEB 28 2015/ PATCHY LIGHT RAIN AND FREEZING RAIN ACROSS PORTIONS OF THE CWA ATTM. TEMPERATURES HAVE WARMED ABOVE FREEZING ALONG AND SOUTH OF A EL DORADO ARKANSAS TO QUITMAN TEXAS LINE. MOST OF THE NORTHERN AREAS SHOULD CLIMB ABOVE FREEZING. AS AN EXTENSION OF THE ADVISORY MAY BE NEEDED IF THE LOWER ELEVATIONS TRAP THE COLD AIR INTO THE AFTERNOON. AND FREEZING RAIN. ALL PRECIPITATION TO TRANSITION TO RAIN LATER THIS MORNING AS TEMPERATURES RISE ABOVE FREEZING.
326 PM EST SAT FEB 28 2015 DRY WEATHER CONTINUES TONIGHT WITH HIGH PRESSURE OVER THE AREA. CLOUDS WILL BE ON THE INCREASE SUNDAY AS A WARM FRONT APPROACHES THE REGION.
333 PM CST SAT FEB 28 2015 AFTERNOON SFC ANALYSIS SHOWS HIGH PRESSURE CENTERED OVER THE GREAT LAKES PROVIDING A MORE ERLY TO ESERLY LOW-LEVEL FLOW OVER THE FORECAST AREA TODAY. WEAK COASTAL TROF NOTED IN SFC ANALYSIS WILL GRADUALLY ADVANCE UP THE COAST INTO TOMORROW WHICH SHOULD FURTHER INCREASE POPS.
AIR TEMPERATURES ARE IN THE LOWER 80S WITH DEWPOINT TEMPERATURES IN THE MID 70S. AN EXPANSIVE HIGH PRESSURE CELL IS CENTERED OVER THE NORTHEASTERN UNITED STATES. UNIFORM WEST-SOUTHWESTERLY FLOW PREVAILS THROUGH MUCH OF THE MID/UPPER TROPOSPHERE OVER THE GULF BASIN AND FLORIDA PENINSULA WITH A DEEP SUBTROPICAL RIDGE JUST EAST AND SOUTH OF THE AREA. WITH SUBTROPICAL RIDGING GOVERNING ALOFT. WARMER- THAN AVERAGE WEATHER IS EXPECTED. AN EXPANSIVE HIGH PRESSURE SYSTEM CENTERED OVER THE NORTHEASTERN UNITED STATES THIS EVENING WILL MOVE SWIFTLY EASTWARD AND ACROSS THE WESTERN NORTH ATLANTIC TONIGHT THROUGH SUNDAY.
1213 PM EST SAT FEB 28 2015 A HIGH PRESSURE RIDGE WILL REMAIN OVER THE AREA THROUGH EARLY SUNDAY.
1252 PM EST SAT FEB 28 2015 AVIATION WEAK LOW PRESSURE WILL MOVE ACROSS SOUTHERN LOWER MICHIGAN THIS EVENING AND SUNDAY SPREADING LIGHT SNOW AS IT MOVES EAST.
333 PM CST SAT FEB 28 2015 MAIN FEATURES ACROSS THE CONUS TODAY ARE A DEEP UPPER LEVEL TROUGH DIGGING ACROSS CALIFORNIA RESULTING IN SOUTHWEST FLOW ACROSS THE SOUTHERN CONUS. MORE SUN FOR THE NORTH AND TEMPS INTO THE LOWER 30S. GUIDANCE IS NEAR TO SLIGHTLY WARMER THAN TODAY AND FORECAST FOLLOWS THE SLIGHT WARM UP. UPPER TROUGH OFF THE SOUTHERN CALIFORNIA SUNDAY EVENING.
SUNDAY NIGHT THROUGH SATURDAY AN UPPER LOW RACING DOWN THE BACK SIDE OF A TROUGH DIGGING TO OUR SOUTHWEST WILL FUJIWHARA THE CLOSED UPPER LOW OVER SOUTHERN CALIFORNIA.
A STORM SYSTEM WILL BRING SHOWERS AND COOLER TEMPERATURES TO THE AREA THROUGH TONIGHT.
1157 AM EST SAT FEB 28 2015 HIGH PRESSURE BUILDS INTO THE AREA THROUGH TONIGHT. A COLD FRONT WILL PASS THROUGH THE AREA SUNDAY NIGHT.
345 PM CST SAT FEB 28 2015 WARMER CONDITIONS NOTED ACROSS THE TENNESSEE VALLEY HAS HELPED TO MELT MORE OF THE SNOW THAT OCCURRED DURING THE PAST MID WEEK. WITH AN UPPER LOW FORMING OVER THE WESTERN GREAT BASIN. A MOIST/STORMY FLOW UNDER THIS LOW WAS SENDING A SERIES OF DISTURBANCES ACROSS THE CENTRAL CONUS. A COLD FRONT APPROACHING WILL BRING LIKELY RAIN CHANCES SUN NIGHT. AS A STRONG COLD FRONT NEARS FROM THE NW. THE EC BEING SLOWER TO BRING IN THE COLDER AIR WOULD BRING A SHORTER DURATION OF FREEZING PRECIP.
As temperatures remain at or below freezing across the northern half of the forecast area, freezing drizzle will once again be possible. Given the possibility of light freezing drizzle and the likelihood of refreezing on area roadways after sunset, the Winter Weather Advisory was expanded until Sunday morning for the Big Country, much of the Concho Valley and Heartland. Forecast highs were trended down and will range from the low to mid 40s across the Big Country, to the mid to upper 50s across the Interstate 10 corridor. Temperatures will slowly continue an upward trend in response to another cold front approaching.
CONTINUED WARM ADVECTION AND A SLIGHT DOWNSLOPE WIND COMPONENT SHOULD BRING VALLEY TEMPS TO NEAR 50 OR THE LOWER 50S ON SUNDAY.
WARM FRONT HAS MOVED A BIT MORE NORTH BUT STILL STRETCHES EAST OUT OF THE LOW ACROSS THE N GULF. WITH AN UPPER LOW OVER CALIFORNIA/GREAT BASIN AND THE PERSISTENT LONG WAVE TROUGH OVER HUDSON BAY THROUGH THE N PLAINS AND GREAT LAKES. OVERALL EXPECT A LITTLE RIDGING ALOFT INTO MON AS UPPER LOW REMAINS OVER CALIFORNIA AND THE TROUGH OVER THE GREAT LAKES DEEPENS. THIS SHOULD ALLOW FOR THE WARM FRONT TO SLOWLY TRACK NORTH. THE WARM FRONT WILL BE A SIGNIFICANT FACTOR IN FORECASTING TEMPS/WX THE NEXT COUPLE OF DAYS. WARM FRONT TOMORROW MAY NOT MAKE MUCH PROGRESS NORTHWARD. NAM HAS VERY LITTLE WARM FRONTAL PUSH TOMORROW.
A LITTLE RAIN IS EXPECTED AT TRI LATE TONIGHT AND TEMPERATURES WILL BE CLOSE TO FREEZING.
THE COASTAL TROUGH REMAINS ALONG THE PALM BEACH COUNTY COAST. THE CONVERGENCE DUE TO THE COASTAL TROUGH AND OLD FRONTAL BOUNDARY. FRONTAL BOUNDARY AND COASTAL TROUGH WILL LIFT NORTHWARD AND DRIER AIR WILL BEGIN TO MOVE INTO THE REGION THIS EVENING. MID TO UPPER LEVEL HIGH PRESSURE WILL THEN DOMINATE THE REGION THROUGH THE MIDDLE OF THE WEEK.
353 PM EST SAT FEB 28 2015 CANADIAN HIGH PRESSURE WILL WEDGE INTO THE AREA FROM THE NORTH THROUGH SUNDAY NIGHT.
SOME DRIZZLE AND PATCHY FOG MAY ACCOMPANY THE LOWER CLOUDS. AND KEPT HIGH TEMPS ACROSS THE EAST IN THE LOWER 50S.
329 PM CST SAT FEB 28 2015 ALL TEMPERATURES HAVE CLIMBED ABOVE ABOVE FREEZING EXCEPT FOR THE WESTERN PORTION OF RED RIVER COUNTY TEXAS.
THE LATEST SATELLITE IMAGERY SHOWS THE LOW PRESSURE DISTURBANCE SETTLING INTO CENTRAL CALIFORNIA.
THIS BELT OF WESTERLIES PREVAILS BETWEEN THE POLAR JET OVER THE CONTINENTAL UNITED STATES AND A DEEP SUBTROPICAL RIDGE EXTENDING FROM THE WESTERN NORTH ATLANTIC TO SOUTHERN MEXICO. AN EXPANSIVE ARCTIC ANTICYCLONE WAS CENTERED FROM THE GREAT LAKES TO NEW ENGLAND. AND CURRENT AIR TEMPERATURES ARE IN THE LOWER 80S WITH DEWPOINTS IN THE LOWER/MID 70S FROM OCEAN REEF TO KEY WEST. AND FOR THE LOWER STRAITS OF FLORIDA JUST SOUTH OF DRY TORTUGAS.
1257 PM EST SAT FEB 28 2015 HIGH PRESSURE BUILDS INTO THE AREA THROUGH TONIGHT. A COLD FRONT WILL PASS THROUGH THE AREA SUNDAY NIGHT.
HIGH PRESSURE IS LOCATED ALONG THE ATLANTIC COAST.
140 PM PST SAT FEB 28 2015 SNOW SHOWERS, LOCALLY HEAVY, WILL CONTINUE INTO SUNDAY AS LOW PRESSURE TRACKS SOUTH THROUGH CALIFORNIA.
1156 AM EST SAT FEB 28 2015 HIGH PRESSURE BUILDS INTO THE AREA THROUGH TONIGHT. A COLD FRONT WILL PASS THROUGH THE AREA SUNDAY NIGHT.
STRONG HIGH PRESSURE WAS IN THE PROCESS OF BUILDING DOWN THE APPALACHIANS AND THIS WEDGE WILL STRENGTHEN ACROSS NORTH AND CENTRAL GA OVERNIGHT. HAVE KEPT THE FREEZING RAIN ADVISORY IN PLACE FOR THE NORTHEAST. TEMPERATURES AT OR JUST BELOW FREEZING STILL LOOK POSSIBLE FOR THAT AREA OVERNIGHT.
High pressure over New England is bringing northeasterly flow at the sfc.
1214 PM EST SAT FEB 28 2015 HIGH PRESSURE WILL BUILD SOUTH OF THE REGION THIS WEEKEND.
MAIN UPPER LEVEL TROUGH AFFECTING THE REGION IS DIVING SOUTH INTO CENTRAL CALIFORNIA. THE GRADIENT WEAKENS SUNDAY AS THE LOW DIGS ESE AND THE HIGH SHIFTS OVER THE NRN PLAINS STATES. A DRY SUNDAY NIGHT WILL GIVE WAY TO ANOTHER TROUGH MOVING SOUTH INTO THE PACNW. MODELS HAVE BEEN TRENDING DRIER WITH THIS TROUGH. BUT THEY ARE ALSO NOW SHOWING THE TROUGH SPLITTING AS IT NEARS OUR AREA. THE UPPER LOW THAT IS SHOWN TO SPLIT OFF TO THE SOUTHWEST LOOKS TO HOLD MOST OF THE MOISTURE TO OUR SW AND THE NORTHEAST PART LOOKS TO KEEP THE COLDEST AIR EAST OF THE DIVIDE. HAVE KEPT THE HIGHEST POPS IN THE MOUNTAINS WITH SNOW LEVELS 2500-3500 FT.
STRONG ONSHORE WINDS WILL BE PEAKING THIS AFTERNOON/EARLY EVENING AS GRADIENT TIGHTENS BETWEEN STRONG HIGH TO THE NORTH AND INVERTED TROUGH OFFSHORE.
843 AM PST Sat Feb 28 2015 A weather system is impacting California today with cooler and wetter weather.
An upper trough will develop just off the coast over the weekend.
825 PM EDT Thu Jun 30 2022 23Z sfc analysis shows weakening high pressure over Kentucky and lower pressure off to the northeast. Scattered showers and thunderstorms return for Friday before a cold front brings better chances for showers and storms for Friday afternoon. The upper level pattern starts out with a large trough over eastern Canada which will support an area of low pressure near the Hudson bay and will drag a cold front through the Midwest and into the Ohio Valley.
/issued 316 PM CDT Thu Jun 30 2022/ Warm days with balmy nights will be the story for the next several days due to a warm front slowly lifting north from the MS/TN border.
Although the 00z evening sounding at KEY sampled virtually unchanged geopotential heights at all isobaric surfaces, high pressure over the Central Atlantic continues to strengthen, which will result in continued filling of the aforementioned cyclonic features. From synopsis, easterly breezes will freshen tonight, then peak and lull through the weekend, as high pressure builds westward into the Southeast United States.
637 PM CDT Thu Jun 30 2022 A cold front will ooze in from the north this evening, and will be the focus for scattered thunderstorms tonight.
(The rest of tonight) Higher dew points and a light south wind in most areas will result in warmer overnight lows compared to the last few nights.
703 PM CDT Thu Jun 30 2022 (This evening through Friday) A weak cold front, currently across northwest Kansas/east central Colorado, will continue to move southward this evening and overnight. This will naturally result in warmer overnight low temperatures tonight.
However, should again see some redevelopment of isolated to scattered showers and storms, mainly over the coastal waters past midnight as weak inverted trough and weak disturbances aloft remain across the region. Min Temps will range from the low to mid 70s.
A weak cold front moving through Friday afternoon will bring scattered rain showers and storms to the area. High pressure continues to dominate the region, keeping skies clear and temperatures hot. A weak cold front will move through Friday afternoon, bringing scattered rain showers and storms to the area.
831 PM EDT Thu Jun 30 2022 High pressure will slide off to the east with a southerly flow developing. Precipitation chances will increase Friday as a cold front approaches from the northwest. As we progress through the day, a broad upper level trough beings to sink towards the Great Lakes region and push a surface cold frontal boundary with it. The surface cold front will act to provide a more robust lifting mechanism for thunderstorms as it moves into our eastern IN and west-central OH counties Friday evening. Broad mid level trough will predominate through the weekend. This has trended slightly stronger to the point of being able to drive the surface cold front south of the forecast area, potentially well south.
A cold front will begin to push across the Panhandles in the next few hours. At the surface, observations show a low pressure center in the northwest Panhandles this afternoon and a cold front up in central KS/CO.
The weak upper level trough remains which will again provide better conditions for convection, especially for inland areas.
This afternoon a cold front stretched down from Thunder Bay and across Minnesota into Nebraska, easily defined in surface observations and a local pressure minima stretching from Lake Superior roughly following along the Midcontinental Rift. Temperatures in the low 80s and semi steep lapse rates have helped to increase instability today, with around 2000 J/kg of SBCAPE. The cold front spurring these storms had already moved beyond the Twin Ports and pushed into NW WI as of 20Z, so the main area under a threat (and Severe Thunderstorm Watch as of writing) are Sawyer and Ashland counties and further east. High pressure builds in tomorrow and weather should be fairly quiet and sunny, though models suggest steep low level lapse rates that could lead to gusty northwest winds once again tomorrow afternoon.
934 PM EDT Thu Jun 30 2022 High pressure will slide off to the east with a southerly flow developing. Precipitation chances will increase Friday as a cold front approaches from the northwest. As we progress through the day, a broad upper level trough beings to sink towards the Great Lakes region and push a surface cold frontal boundary with it. The surface cold front will act to provide a more robust lifting mechanism for thunderstorms as it moves into our eastern IN and west-central OH counties Friday evening. Broad mid level trough will predominate through the weekend. This has trended slightly stronger to the point of being able to drive the surface cold front south of the forecast area, potentially well south.
Expect similar conditions tomorrow as the upper level low approaches the Washington Coast and the region remains under dry southwesterly flow.
Current surface analysis shows a broad area of high pressure over the mid-Atlantic which is driving the clear skies and warm weather so far today. Lows are expected to be unpleasant in the low/mid-70s with dewpoints in the low-70s. Tomorrow, a deep upper-level trough will send a surface cold front surging southward. Tomorrow will be hot and humid, with highs in the low-90s.
Meanwhile, an upper level trough positioned offshore will continue moving slowly southward along the Pacific Northwest, and then will begin to deepen on Friday.
922 PM EDT Thu Jun 30 2022 Shower and storm coverage will increase for Friday into the weekend as a cold front approaches from the northwest. With weak southerly flow, and an already humid setup, expect both temperatures and dewpoints to increase from Thursday to Friday, despite the increased shower coverage blocking insolation.
An inverted trough over the coastal waters slowly lifts north-northeastward tonight.
325 PM MDT Thu Jun 30 2022 Northeast Montana is in between two upper lows.