Aikyam-Lab/Synoptic-Bench huggingface dataset:
344 AM EST Thu Nov 17 2016 Today-Tonight: A few showers continue just offshore The Miami-Dade and Broward coast early this morning as offshore flow from the mainland reaches the warmer Gulf Stream. Coverage has been on the wane as a secondary upper level trough axis pushes east of the region.
Patch freezing fog will develop Wednesday night and Thursday morning over the valleys of northern Nevada.
A long wave trough pushing through the region was responsible for the showers that may persist in the area mountains overnight. Meanwhile temperatures will slowly fall below freezing over the higher elevations including central oregon and the Grande Ronde valley overnight and the present short term forecast appears on track.
134 AM EST Thu Nov 17 2016 A weak trough of low pressure aloft and a surface cold front will move southeast of the area overnight.
357 AM CST Thu Nov 17 2016 (Today and Tonight) Gusty south winds expected today as lee trough strengthens and pressure gradient tightens. Mixing due to the stronger winds were already allowing warmer temperatures in the upper 50s and lower 60s at 3 AM, compared to temperatures in the 40s yesterday. While temperatures will start off warmer start, highs may will be a degree or two lower, as high clouds thicken this afternoon with the approach of an upper level western trough. Cold front and lift from the upper trough will be coming in after midnight tonight.
The ridge continues to center over us from the west and temperatures will respond by being approximately 5 degrees warmer today compared to yesterday.
High pressure will continue to build into the region from the lower MS River valley through the short term and will keep things precipitation free.
High pressure covers much of the eastern U. This high will provide one more day of dry weather with temperatures remaining well above normal.
204 AM EST Thu Nov 17 2016 Upper ridge will continue to build in from the west through tonight.
311 AM EST Thu Nov 17 2016 High pressure for the remainder of the work week.
An upper level trough will move slowly across the area tonight and Thursday bringing clouds and a chance of showers.
259 AM MST Thu Nov 17 2016 The deep upper level trough is on track to bring the region's first widespread snow and cold event of the season.
336 AM EST Thu Nov 17 2016 High pressure for the remainder of the work week.
Very mild conditions will continue tonight as a developing cold front remains off to the west.
Breezy southerly winds will continue overnight as 40-50kt 850mb jet sets up across the region ahead of an incoming cold front. Winds will drop off after 02Z but will still remain gusty as cold front approaches from the northwest. /Issued 758 PM CST Wed Nov 16 2016/ Mid level ridge was centered over East TX this evening, with SW flow over the Central Plains. Since the cold front is not expected to arrive until after midnight tomorrow night, it is looking more likely.
358 AM EST Thu Nov 17 2016 The large scale pattern across the CONUS will feature a large trough of low pressure moving slowly eastward across the central and northern plains, and a large sprawling ridge of high pressure moving slowly across the Gulf Coast. This ridge extends northward well into the Tennessee and Ohio valley regions and New England.
1136 PM CST Wed Nov 16 2016 Winds are turning northwest a bit faster than expected and the lower clouds are doing the same. Low pressure moving thru Manitoba this aftn northwest of Winnipeg at 20z. Trough of low pressure south from the low through the Devils Lake basin to nr Jamestown. Main cold front located from the low and into far southeastern Saskatchewan and far northwestern ND. This cold front will drop southeast tonight. This low and upper low moves NNE with main deformation zone developing quickly over parts of central into northeastern SD.
The windy conditions will continue tonight as the low level jet strengthens ahead of an approaching cold front. Isolated to scattered showers and perhaps a few thunderstorms will develop late tonight from west to east as moisture advection increases in association with the low level jet.
Tonight into early tomorrow, the well-advertised cold front will approach and march across the forecast area.
106 AM EST Thu Nov 17 2016 High pressure for the remainder of the work week.
Broad surface and upper ridging over the western states will move into and through the Midwest mid and late week.
An upper ridge translates eastward across the eastern states while an upper trof advances across the Plains. Highs today will be about 10-15 degrees above seasonable values and range from the lower 80s inland to the upper 70s closer to the coast, but should remain at least a few degrees below record values.
1048 PM CST Wed Nov 16 2016 Main aviation issue through tomorrow will be strong winds due to approaching low pressure system. /Issued 611 PM CST Wed Nov 16 2016/ Main aviation issue through tomorrow will be the winds due to approaching low pressure system. There should be a reprieve tomorrow as an upper level trough comes closer and winds increase. Most models agree that the precip behind the front will stay north of the area, so the forecast remains dry through the weekend as ridging builds in.
1154 PM EST Wed Nov 16 2016 Upper air pattern consists of a 500 mb trough over the western U. and a broad ridge across the central U. this morning with a trough in the ern U. The ridge builds into the upper Great Lakes tonight and then moves into the lower Great Lakes on Thu. Because of this, went slightly cooler with temperatures for highs on Thu and went closer to mos guidance. With low sun angle and weak sunlight, this will also argue for going with cooler temperatures. Today, a trof developing into the Upper Great Lakes from low pres organizing over the Plains will result in cigs falling to MVFR during the aftn at KIWD/KCMX then to LIFR in the evening.
Current Situation and Analysis -- An expanding and intensifying high pressure cell over the eastern United States is driving slightly cooler and much drier air southward across the Florida Keys and adjacent coastal waters early this morning.
The low level wind shear will lower on Thursday as surface winds increase from the south by mid- morning.
120 AM EST Thu Nov 17 2016 High pressure will prevail through late week.
1010 PM MST Wed Nov 16 2016 Current surface analysis shows cold front from eastern ND to central SD to western Neb. Low pressure is developing along the front across northeast CO. Upper level analysis shows ridge axis east of the region, with trof axis over the Great Basin, moving quickly eastward. Southwest flow ahead of the trof is helping to produce some light pcpn across western WY and southern MT this afternoon. The upper trof looks to be a fairly quick mover, with snow ending from west to east Thursday night.
Breezy south winds just off the surface and sct-bkn cirrus contributing to keeping any fog thin and patchy early this morning despite warmer dewpoints. Protective ridging has pushed to the east of WI and for today and tonight, breezy south winds are expected on the backside of the departing high pressure ridge.
1226 AM EST Thu Nov 17 2016 Weakening low pressure will slowly cross the region late tonight.
Strong winds will continue through this evening as a potent cold front advances through the region. Cooler conditions expected the remainder of the week with temperatures falling near or below freezing for many areas outside of the lower desert and urban locations. A cold front currently lies approximately along a line from Caliente to Indian Springs, moving south with winds shifting to the northwest behind it.
Surface ridging is in control across Eastern Conus this AM with a cloud free satellite picture across Alabama as well as much of the Southeast U. Lots of sunshine is expected for today under this dome of weakening but still in place high pressure and thus warmer temperatures than yesterday are on tap. Southerly winds will pick up today some as the flow begins to shift slowly and that will also aide in the warmer conditions for today and also for tonight.
651 PM EST Tue Jan 3 2017 A cold front moves across the area later tonight and will bring much colder air in from the west.
Cold front currently just passing PAH is expected to sweep across the area later today into tonight, and shower activity will continue along and ahead of the front before shifting eastward out of the area tonight.
A cold front will move through the region this evening/overnight and N/NE winds will increase slightly, and perhaps become a little gusty at CRP. A cold front, currently moving into EWX's northern CWA, is forecast to move through S TX this evening and is expected to be moving south of the area around midnight. MX temps for Wed will likely be around 15-20 degrees cooler than today's warm values. As a cold front moves across the region tonight, offshore winds are expected to become moderate overnight.
954 PM EST Tue Jan 3 2017 Rain showers will continue tonight until the passage of a cold front. With 10pm update, another area of rainfall is crossing the forecast area from southwest to northeast with the cold front passage. Will maintain the chance PoPs for upslope and lake enhanced snow showers in the typical locales, but with limited moisture within the dendritic growth layer, and building subsidence by the afternoon, efficient snowfall production will be limited, especially in the high terrain.
Complicated winter pattern to start the year with moist West to Northwest flow ahead of an elongated upper trough moving South. Cold, arctic air will continue to move south over the region Wednesday afternoon behind a cold frontal boundary that will bring another surge of upslope favorable NE surface winds to the plains.
Drier air was filtering over SE under drier westerly flow with dew pts falling into the 50s trailing a weak pre-frontal trough axis that extended roughly from coastal SE Ga southwestward toward Apalachee Bay. Through midnight the pre-frontal trough will continue to press southward with precipitation ending across our forecast area. Drier and cooler air will filter across the area late tonight with min temps expected to fall into the mid/upper 50s SE GA to near 60 across our southern Fl zones and coast. SW winds will continue to veer to the west through the night then to the NW into Wed trailing the surface frontal passage with gradual lifting of the low cloud bases through midday.
Cold front from Northwest Louisiana into East Central Texas will continue to move southeast and through the forecast area tonight.
Weakly cyclonic low level flow associated with the frontal trough is often an indicator of widespread low cloudiness. With the low level winds and occasionally quite cloudy conditions, there could be some bouncing up and down of visibility and ceilings. The overall pressure gradient will weaken slightly as the frontal trough moves through, so no small craft advisory or exercise caution statements are anticipated with this rather weak front.
552 PM EST Tue Jan 3 2017 Low pressure over northeast Ohio will move to near Buffalo by late this evening. A strong cold front will sweep across the area tonight. Arctic high pressure will then build across the Plains states and Midwest the second half of the week. The eastern system over PA is quickly exiting the area with its rain shield while a rapidly advancing cold front with associated jet is producing a quickly expanding area of convection over IL/IN with isolated thunder. Temperatures will fall below freezing by morning. Cold advection will overspread the region in the wake of the cold front on Wednesday and continue through much of the period.
937 PM EST Tue Jan 3 2017 The approaching cold front is just reaching Scott County at the moment.
428 PM CST Tue Jan 3 2017 Large scale pattern eventually tilts toward a bit more of a west northwest flow rather than quasi-zonal as experienced today as a a negatively tilted trough develops to the east of our region. For lows tonight, I went with cooler MOS numbers and Superblend for highs Wednesday.
Update High pressure is in control of the region tonight over the Northern Plains and Prairies. Did go a bit warmer then last nights lows, but with continued winds around 10 mph driving wind chills around -30 the wind chill advisory looks spot on for tonight.
1014 PM EST Tue Jan 3 2017 A cold front moves across the area later tonight and will bring much colder air in from the west.
837 PM EST Tue Jan 3 2017 Rain showers will continue tonight until the passage of a cold front. With 7:30pm update, widespread rain has moved to the east of the forecast area, but another area of rainfall will move into the region from the east this evening with the actual cold front crossing. Widespread precipitation will continue to shift northeastward this evening as the low departs, with rain showers expected to continue until the passage of a cold front overnight. Will maintain the chance PoPs for upslope and lake enhanced snow showers in the typical locales, but with limited moisture within the dendritic growth layer, and building subsidence by the afternoon, efficient snowfall production will be limited, especially in the high terrain.
/Issued 326 PM CST Tue Jan 3 2017/ The Arctic cold front has made its way through the area today, having pushed well south of the area into Texas.
1019 PM EST Tue Jan 3 2017 A cold front moves across the area later tonight and will bring much colder air in from the west.
Low pressure moving through the Ohio valley will drag a cold front through the area that will bring rain to an end across central Indiana later tonight after a possible very brief changeover to snow. Temperatures will start dropping off quite a bit later tonight in the wake of a cold frontal passage and much colder temperatures will be in place through the weekend.
710 PM EST Tue Jan 3 2017 Cold front passes this evening/tonight with more showers.
825 PM CST Tue Jan 3 2017 A cold front is moving southeast across the CWA this evening, with northwest winds increasing to 10-15 mph in its wake. Cooler and drier air will advect into the area tonight and Wednesday. The back edge of the low cloud deck extends from near Branson, MO to Washington, IL and is moving toward the Mid-South. Ahead of the cold front, a few spotty showers and occasional drizzle area expected.
A dry cold front will continue moving through the area this evening, resulting in a N wind at SAT/AUS at 10-15 kts with a few higher gusts and a N to NE wind developing later tonight at DRT around 4-7 kts. North/Northwest winds continue across the area ahead of the next cold front which is now beginning to knock on the door of the CWA at the present time. This front is in response to an eastward push within the main upper trough currently in place across the northern CONUS. North winds tonight will be in the 10 to 15 MPH range on average with lows dropping into the 30s and 40s across the area with the lower temperatures closer to the Hill Country.
1006 PM EST Tue Jan 3 2017 A cold front will push offshore this evening and be followed by a second dry cold front late Wednesday.
947 PM CST Tue Jan 3 2017 High pressure building behind a cold front allowing for much cooler temperatures across the region. Low temperatures tonight forecast to fall into the 30s and 40s across most locations with subfreezing temperatures possible along and north of Interstate 30 where skies may become partly cloudy near daybreak.
/issued 247 PM CST Tue Jan 3 2017/ Colder weather is on the way! A cold front is currently nosing SE through the Permian Basin this afternoon. The front will continue to slowly push SW, stalling near the higher terrain regions late tonight. With the cooler airmass in place, overnight lows will drop into the upper 20s to low 30s across much of Southeast NM and Permian Basin. Wednesday, southerly winds return briefly, allowing the cold front to lift to the north.
A cold front will continue to move through the area this evening into the early morning hours. A cold front will move through the region this evening/overnight and N/NE winds will increase slightly, and perhaps become a little gusty at CRP. A cold front, currently moving into EWX's northern CWA, is forecast to move through S TX this evening and is expected to be moving south of the area around midnight. MX temps for Wed will likely be around 15-20 degrees cooler than today's warm values. As a cold front moves across the region tonight, offshore winds are expected to become moderate overnight.
A moist westerly flow extending across southern Oregon and Idaho may spread snow into the higher terrain of far southwest Montana tonight through Wednesday.
Cold front currently working across eastern middle TN at this hour. As sfc cold front pushes thru mid state, mainly along and ahead, some light shwrs will be possible, in at least vcnty of terminals. However, it will take some time before IFR to MVFR ceiling erosions to take place, as strong sfc ridging influences try to build in from the northern Rockies thru 04/24Z. It looks like ceiling erosions will occur slowly from west to east from around 04/10Z west to around 04/19Z east, as a weak upper level trough passage and dry quasi zonal flow aloft become established thru 04/24Z.
552 PM CST Tue Jan 3 2017 Large scale pattern eventually tilts toward a bit more of a west northwest flow rather than quasi-zonal as experienced today as a a negatively tilted trough develops to the east of our region. For lows tonight, I went with cooler MOS numbers and Superblend for highs Wednesday.
The cold front poised to bring colder temperatures and low chances for winter weather back to the region was approaching the Ohio River.
416 PM MST Tue Jan 3 2017 Break in the snow currently over the CWA with some snow confined over the higher mtns. while periods of snow continue over the higher mtns. Otherwise continued cold with the arctic high settling down the high plains.
750 PM CST Tue Jan 3 2017 The cold front is entering NW Alabama as of 730pm. Lows by sunrise could be upwards of 20-25 degrees cooler than this mornings values.
Did go a bit warmer then last nights lows, but with continued winds around 10 mph driving wind chills around -30 the wind chill advisory looks spot on for tonight.
Winds will become south/southwesterly and gusty across the Panhandles by 18z Wednesday with return of northerly winds expected early in the next period as cold front moves through. Our cold front from Today will return northward across the area as a lee side low drops into eastern New Mexico. The question is just how far north the warm front will make it and how much WAA will occur across the SW. Have brought temperatures up but have leaned on the cooler side given cloud cover. The warmer temperatures on Wednesday will quickly be removed from the area as a cold front surges southward. The cold front is expected to be knocking on our door to the north shortly after sunset and be south of the area by daybreak.
721 PM EST Tue Jan 3 2017 Rain showers will continue tonight until the passage of a cold front. With 7:30pm update, widespread rain has moved to the east of the forecast area, but another area of rainfall will move into the region from the east this evening with the actual cold front crossing. Widespread precipitation will continue to shift northeastward this evening as the low departs, with rain showers expected to continue until the passage of a cold front overnight. Will maintain the chance PoPs for upslope and lake enhanced snow showers in the typical locales, but with limited moisture within the dendritic growth layer, and building subsidence by the afternoon, efficient snowfall production will be limited, especially in the high terrain.
559 PM EST Tue Jan 3 2017 A cold front will be moving across the Tennessee Valley overnight.
A cold front is currently moving across the region with a cooler air mass spilling in behind the boundary. Cold front from Northwest Louisiana into East Central Texas will continue to move southeast and through the forecast area tonight.
At best, think light amounts (less than an inch) or a dusting of snow accumulation across Central KS, given the high snow to liquid ratios expected (ie, fluffy snow). W-NW flow will slowly translate to the east, allowing ridging and southwest flow to return to the plains. High pressure will continue to build into the area.
There may be occasional light mountain showers on and off throughout the week, but the lower elevation communities will remain primarily dry. /238 PM MST Tue Jan 3 2017/ Latest consensus among the simulated satellite imagery indicates that the high clouds will finally dissipate somewhat Wednesday.
1049 PM EST Tue Jan 3 2017 A cold front will push offshore this evening and be followed by a second dry cold front late Wednesday.
/Issued 325 AM CDT Sun Oct 16 2016/ The unseasonably warm weather will continue for at least another 2-3 days as mid-level ridging and southwesterly low-level flow prevails.
The high temperatures and very low humidity expected behind a dryline in northwest Oklahoma will increase fire weather conditions.
a low pressure system moving inland through the western states will maintain stronger onshore flow with more clouds along and west of the mountains with small chances for light precipitation during the late night and early morning hours.
However, the upper level low pivoting through north Florida has eroded mid and upper level heights across Southern Florida and the Florida Keys (see 12Z RAOB analyses). Mean layer analyses from CIMSS and model plan views indicate weak cyclonic curvature at all levels southeast of the upper level low, including across the Keys and South Florida. Temperatures are in the lower to mid 80s and dewpoints remain in the mid 70s. Water vapor loops place a lobe of vorticity pivoting around the west side of the upper level low, unseen by the available satellite derived or model analyses. The increase in shower coverage west of Andros appears to be result, among other things, an easterly wind burst in the lower troposphere.
Upper level low center over northwest Georgia was keeping skies partly to mostly cloudy over our eastern counties early this morning, while western counties were mostly clear.
1051 AM EDT Sun Oct 16 2016 A ridge of high pressure extending from southern Virginia to off the Mid Atlantic Coast will drift slowly to the south today and Monday. A weak cold front will move to near the New York.
Winds will shift to southwest just ahead of the cold front, and then weaken in the post frontal environment. Warm front will move into the western counties mid to late afternoon, with gusty southerly winds out ahead of the front. Main thing to watch will be the warmth over central SD combined with the drying air near and behind the warm front as it finally moves into the western CWA by mid to late afternoon. Strongest winds are actually expected ahead of the warm front, with slightly lighter winds behind the front. There may even be a lull for a time directly under the trough axis.
/issued 444 AM CDT SUN OCT 16 2016/ Upper anticyclone poised over the Permian Basin this morning will edge eastward today downstream of broad troughing across the Intermountain West. Although the gustiest surface winds and thermal ridge will unfold to our north, deeper mixing than yesterday alone could certainly put record highs in jeopardy at Lubbock and Childress. One more warm day will be in store for Monday as the ridge shifts off to the east but we keep decent southwesterly flow at the surface to provide enough downslope warming component to keep highs in the low to mid 90s.
917 AM EDT Sun Oct 16 2016 Scattered showers across north Georgia and northeast Alabama slowly moving northward in association with the upper trough slowly drifting east. Chattanooga Airport, TN 81 61 85 62 / 20 0 0 0 Knoxville McGhee Tyson Airport, TN 81 58 84 60 / 10 0 0 0 Oak Ridge, TN 81 58 84 60 / 0 0 0 0 Tri Cities Airport, TN 79 52 79 54 / 10 0 0 0.
Quieter weather is expected most of the upcoming week as high pressure builds overhead. As expected, textbook rain shadowing is occurring thus far east of the Sierra crest, although that will probably change overnight as the trough axis passes by.