Aikyam-Lab/Synoptic-Bench huggingface dataset:
High pressure will build across the region for Thursday through the weekend. A ridge of high pressure building across the region will put an end to our rain chances for Thursday through the weekend, with decreased cloud cover allowing afternoon temperatures to climb back into the 80s across the interior, with seasonal temperatures continuing near the coast.
330 AM CDT WED OCT 5 2016 Today will be much like yesterday, warm and dry, as persistent westerly flow aloft keeps the thermal ridge in place. SW flow will develop aloft later tonight as an upper trough digs through the 4 Corners region and on into the Central Plains Thursday afternoon.
143 AM EDT WED OCT 5 2016 Aviation A cold front will bring the threat of showers and thunderstorms to the area Wednesday afternoon into early evening.
601 AM EDT Wed Oct 5 2016 High pressure will maintain dry and warm weather until the approach of a cold front this weekend. High pressure, over the Northeast CONUS, will maintain dry weather and temperatures about 5 degrees above the averages. Upper-level ridge axis will shift eastward on Thursday night and Fri, leaving the forecast area beneath weak southwesterly upper flow.
337 AM EDT WED OCT 5 2016 High pressure through much of the work week. Matthew from the south and an upper trough from the west will increase chance for rain this weekend. High pressure remains to our northeast with easterly low level flow across the Central Appalachians and Middle Ohio River Valley. Dry conditions under high pressure with southeasterly flow across the area. An upper trough approaches from the west as hurricane Matthew moves northward, our forecast area will be stuck in between for increased PoPs.
159 AM EDT WED OCT 5 2016 Cool high pressure will ridge down the East Coast and across the Carolinas through Thursday. Cool, 1030 mb high pressure centered off the New England coast will continue to extend SWWD through the ERN U. Projected 12Z thickness values are generally 5-10 meters lower than those of Tue, which, given a persistence pattern, favors low temperatures up to a few degrees cooler than those of Tue - in the mid-upper 50s to lower 60s. Some visibility restrictions may result as the low cloud bases lower, but a stirring NE breeze should preclude the development of dense fog. After lows in the upper 50s to lower 60s, expect highs Thu in the lower-mid 70s.
121 AM EDT Wed Oct 5 2016 High pressure will maintain dry and warm weather until the approach of a cold front this weekend. High pressure, over the Northeast CONUS, will maintain dry weather and temperatures about 5 degrees above the averages. Upper-level ridge axis will shift eastward on Thursday night and Fri, leaving the forecast area beneath weak southwesterly upper flow.
Additional cold frontal thunderstorms that are expected to develop may affect BVO/TUL/RVS after 06Z. A pseudo warm front was analyzed from Central OK down into the ArkLaTex. The warm front will retreat north to near the Kansas border by this evening.
540 PM CST Tue Dec 20 2016 High pressure has shifted south of the Ohio River, resulting in southwesterly winds across the entire KILX CWA this afternoon. With partial cloudiness in place and continued southerly winds of 5-10mph, low temperatures will be warmer than they have been in recent nights, with readings remaining in the upper teens to around 20 degrees.
For pops, will keep them out overnight through 12Z, then will need "chance"s in the high mountains on Wednesday. There is a departing 150 knot upper level speed max over northern Colorado, while there will also be shallow anticyclonic upslope flow on the plains behind Wednesday's cold front. Should see at least areas of light snow over the high country with sufficient mid level moisture.
845 PM EST Tue Dec 20 2016 A frontal zone will push off the Southeast coast tonight, as high pressure builds in from the north.
940 PM EST Tue Dec 20 2016 High pressure through Wednesday.
Light and variable winds will become predominantly southerly and will shift to the north tomorrow as a cold front passes by from northwest to southeast.
957 PM EST Tue Dec 20 2016 High pressure extending from the Mid-Atlantic to the Deep South will build across the area Wednesday.
Dry weather will continue today as weak high pressure builds over Arizona.
952 PM EST Tue Dec 20 2016 A weak area of low pressure will track along the Maine coast this evening. A warm front will move north of the region tonight. Low pressure passes well north of the area Wednesday.
1027 PM EST Tue Dec 20 2016 Currently - High pressure over the eastern United States is generating gentle to moderate northeast to east breezes across the Florida Keys and surrounding waters. Mid and upper level ridging is hanging on across the area while a trough aloft is gradually amplifying across the southeast. Short Term Update - The area of high pressure to our north will continue to shift eastwards overnight. Gentle to moderate northeast to east breezes will continue across Keys waters due to a high pressure system over the eastern United States.
A dissipating cold front boundary will keep chances for some scattered showers on wednesday, mainly in the afternoon hours.
The main theme for first few days of the Winter season leading into the holiday weekend will be one of higher regional moisture leading to warmer.
927 PM EST Tue Dec 20 2016 High pressure will remain in place through the middle of the week.
Have increased snow/rain coverage across the area this evening associated with the passage of a cold front.
The low clouds will persist through Wed morning then some drier air will filter in from the north and break up the stratus across northern sections. Min temps over the interior counties will be noticeably cooler than recent days, esp along/north of the I-4 Corridor where weak cool air advection will push temps into the M/U50s.
913 PM EST Tue Dec 20 2016 Low pressure over Ontario will move east into Quebec tonight as high pressure begins to build over the lower Ohio valley.
The low level moisture will continue rising tomorrow which will likely result in MVFR ceilings persisting into the afternoon around the RGV. /issued 249 PM CST Tue Dec 20 2016/ SHORT TERM (Tonight through Wednesday Night): The first two periods will be rather benign as high pressure spreads over the area with air mass modification, and with broad mid level ridging aloft.
And with temperatures already near or below freezing in those same northern tier counties, we are strongly considering changing a portion of the DFA into a Freezing Fog Advisory. Will make decision on Freezing Fog Advisory and have update forecast done by 830 pm. Our forecast lows along the I-20 corridor are in the lower 30s, which would suggest visibilities below a mile likely by morning. Should also point out that some temps are going to be below freezing after midnight, so some freezing fog at ground level is also possible.
710 PM EST Tue Dec 20 2016 High pressure through Wednesday.
646 PM EST Tue Dec 20 2016 A weak area of low pressure will track along the Maine coast this evening. A warm front will move north of the region tonight. Low pressure passes well north of the area Wednesday.
530 PM MST Tue Dec 20 2016 The best potential for strong winds has passed for central Laramie and Carbon Counties, including Cheyenne and Rawlins, so allowed the High Wind Warning to end at 5pm. For northern Carbon, eastern Platte, and western Converse Counties, upstream obs indicate there remains some potential of strong mountain wave activity to mix to the surface for a few more hours, so extended the High Wind Warning for these locations through 9pm. 700mb winds easing Wednesday as a cold front presses south into Colorado.
842 PM EST Tue Dec 20 2016 High pressure will control the region's weather through Wednesday.
Cold front passes northern terminals shortly after sunrise, and around 16z Wednesday at AMA. /Issued 410 PM CST Tue Dec 20 2016/ Nearly zonal flow across the Panhandles will continue for the next few days as a large upper level low spins in the Pacific, and weak ridging remains in place across the Gulf Coast.
410 PM CST Tue Dec 20 2016 Nearly zonal flow across the Panhandles will continue for the next few days as a large upper level low spins in the Pacific, and weak ridging remains in place across the Gulf Coast.
This may help keep temperatures a little warmer in the west and cooler in the east where temperatures have already fallen to 42-43 degrees. Northeast flow over the coastal waters going slack and warm front creeping back north. /ISSUED 541 PM CST Tue Dec 20 2016/ VFR conditions are expected to prevail tonight and Wednesday, with light and variable winds becoming southwest and increasing to 5 to 8 knots Wednesday morning as surface ridging pulls away from the region.
While low clouds redeveloping overnight cannot be ruled out, at this point lean toward a mostly clear sky so will lower sky cover and add some patchy freezing fog. Chattanooga Airport, TN 28 56 40 56 / 0 0 10 10 Knoxville McGhee Tyson Airport, TN 26 53 37 52 / 0 0 10 10 Oak Ridge, TN 25 52 36 52 / 0 0 10 10 Tri Cities Airport, TN 22 52 30 49 / 0 0 10 10.
953 PM EST Tue Dec 20 2016 High pressure drifts off the New England coast tonight. Meanwhile, another high pressure area from the southwest will build in Wednesday. This high moves offshore Wednesday night as a low moves just north of the Great Lakes.
Strong trof moves through the Rockies and into the Plains for the weekend. A fast moving low pressure system will bring scattered rain and snow showers tonight with MVFR ceilings and local IFR visibility, esp over ne WY and the Black Hills. Gusty west winds will develop late tonight behind a low pressure trough, with the strongest winds expected on the SD plains.
High pressure across the region will allow for IFR cigs and vis again tonight.
638 PM EST Tue Dec 20 2016 High pressure will settle over central NC on Wednesday then drift offshore Wednesday night.
Low level cloudiness will continue through the night, but drying conditions will move into the area tomorrow as high pressure to the north builds into the area. High pressure builds into the area on Wednesday and will produce continued northeast winds around 10-15 knots.
The latest surface analysis shows the weak front has pushed all the way to south Florida as high pressure builds in from the north. This will continue overnight as cooler and somewhat drier air filters in.
541 PM CST Tue Dec 20 2016 VFR conditions are expected to prevail tonight and Wednesday, with light and variable winds becoming southwest and increasing to 5 to 8 knots Wednesday morning as surface ridging pulls away from the region.
A cold front will blow through Wednesday night. This cutoff low is responsible for the cirrus over the region, as subtropical moisture continues to be routed northward on the east side of the low before drifting east in quasi-zonal flow aloft. Tonight, temperatures will drop into the lower 30s to middle 40s, which would make tonight's lows warmer than most of the afternoon high temperatures only 48 hours ago. A very warm day is expected on Wednesday ahead of the next cold front, as westerly downslope flow increases and compressional warming will allow temperatures to climb to the upper 60s and 70s areawide. A change is coming Wednesday night, as the next cold front pushes south into the area.
633 PM EST Tue Dec 20 2016 Low pressure over Ontario will move east into Quebec tonight as high pressure begins to build over the lower Ohio valley.
A cold front will pass for late afternoon and early evening with broken stratus clouds to follow. A cold frontal passage will occur for the late afternoon and evening with broken stratus of 1-3 kft to follow for Wed night. However brisk sswly winds will develop on Wed then shift wly Wed night with the cold frontal passage. Winds will weaken this evening as low pressure moves off to the northeast. Surface temperatures are right around freezing.
A return to westerly component winds is expected for much of late tonight and Wednesday before a stronger cold front arrives variously between 18z and 00z; may add a time change group to the next TAF package for this wind shift. /issued 347 PM CST Tue Dec 20 2016/ Progressive nearly zonal flow is in place across the lower 48. James A cooler air mass will move in behind the weak front that pushes through late Wednesday.
616 PM EST Tue Dec 20 2016 Low pressure over Ontario will move east into Quebec tonight as high pressure begins to build over the lower Ohio valley.
Wind should gradually decline overnight therefore going to let the high wind warning go until 12z or 5am for the region. Proton Previous Discussion Low pressure is developing off the lee of the Canadian Rockies with the trof extending south and southeast through Montana. The low moves across southern Canada overnight bringing a noticeable wind increase behind the trof.
906 PM EST Tue Dec 20 2016 Updated the forecast to adjust hourly wx elements and add patchy freezing fog for tonight into Wed morning. With all locations below freezing tonight, fog will have the potential to freeze mainly on elevated surfaces and roadways if it becomes dense enough. Where the clouds have moved in, temps have been held down in the lower 30s. Some of the high resolution guidance has it expanding again tonight across portions of south and east central KY. If that does develop, we could see a few slick spots again as temperatures drop into the low to mid 20s.
930 PM CST Tue Dec 20 2016 Surface analysis this evening shows an area of high pressure in place centered over Alabama. However, with dew points lingering in the low 30s/upper 20s and light/calm winds, we are still expecting areas of dense freezing fog through the early morning hours. As such, the Freezing Fog Advisory remains unchanged. Among low visibility hazards, freezing fog can cause light icing on bridges/overpasses, or on roadways at higher elevations.
751 PM EST Tue Dec 20 2016 High pressure extending from the Mid-Atlantic to the Deep South will build across the area Wednesday.
Low pressure is developing off the lee of the Canadian Rockies with the trof extending south and southeast through Montana. The low moves across southern Canada overnight bringing a noticeable wind increase behind the trof.
Weak NNW flow will dominate Thu then the next front will push across the waters late Thu with winds shifting onshore once again Fri with a coastal trough developing along the SE Atlantic coast into the weekend.
1001 PM EST Tue Dec 20 2016 A frontal system off the coast will move farther offshore tonight as high pressure builds in.
648 PM EST Tue Dec 20 2016 High pressure will remain in place through the middle of the week.
532 PM CST Tue Dec 20 2016 Weak high pressure will allow decoupling of the atmosphere and therefore another relatively cold night with lows ranging from the middle teens across the north to the lower 20s in the south. A weak cold front will move across the area on Wed/Wed night, but no precipitation is expected. A cutoff low west of Baja California will eject northeastward into the Four Corners region on Thu night in response to an approaching upstream trough. Meanwhile, a longwave trough will approach the west coast and eventually develop into a large low pressure system somewhere across the central CONUS. Models have come into much better agreement compared to 48hrs ago, and it now appears that the maturing low pressure system will be located somewhere between Oklahoma City, OK and Williston, ND.
Snow and rain has ended across much of area as the cold front is working its way through the Magic Valley and areas south.
GAH PREVIOUS SHORT TERM DISCUSSION: An upper level ridge building across the northern plains will maintain mild and dry weather conditions across the forecast area for the remainder of the weekend.
Surface analysis this evening places a 1031 mb ridge of high pressure centered over the Middle Mississippi Valley. 9 micron satellite trends over the past several hours has shown an area of low stratus encompassing portions of the Lower East Arkansas, West Tennessee and Northwest Mississippi. High pressure will gradually build into the region tonight.
652 PM EST Fri Nov 25 2016 A weakening cold front will cross the commonwealth later today and tonight.
With temperature falling below freezing over the higher elevations, some patchy freezing drizzle is possible in the morning, although warm surfaces should preclude problems and headline necessity. Moisture depth on model time-height sections does look to deepen a bit on Saturday, thus supporting some snow showers across the ridges.
405 PM MST Fri Nov 25 2016 Water vapor shows upper ridge building through the nrn Rockies into the nrn plains. Near the sfc, southwest bl flow bringing warmer air back into the region. Even warmer temps expected on Saturday with thermal ridge passing overhead, allowing temps to rise well into the 50s and even some lower 60s south/east of the Blkhls.
The latest runs of the HRRR model suggest lower chances of fog than previously expected, but with temperatures nearing dew points across most of the Freezing Fog Advisory area, it seems imprudent at this point to make any changes to the advisory. With temps falling below freezing some concern for some dense freezing fog at PNC, so have introduced a tempo there.
527 PM CST Fri Nov 25 2016 Quiet weather will continue for the part of the short term with upper ridging across the Plains, in advance of the next trough that is just beginning to move onshore on the west coast.
Mild temperatures in the lower elevations will limit snow accumulations to the mountains and the higher passes.
Frontal boundary has pushed out of the region and the upper trough will swing through overnight. Large band of low clouds associated with the trough will move into the area overnight which will help keep low temperatures above freezing. Chattanooga Airport, TN 39 58 32 62 / 0 0 0 0 Knoxville McGhee Tyson Airport, TN 37 53 28 59 / 0 0 0 0 Oak Ridge, TN 37 54 28 60 / 0 0 0 0 Tri Cities Airport, TN 35 48 24 58 / 10 0 0 0.
940 PM EST Fri Nov 25 2016 A few shallow radar echoes continue over the coastal Atlantic waters south and southwest of the Lower and Middle Keys late this evening. As high pressure eases away from the Southeast Coast into the Atlantic, the local breezes will continue to diminish by a few knots. An exercise caution headline will therefore be removed for the deeper Gulf waters north and northwest of the Lower Keys. In 1970, the low temperature in Key West dipped to 50 degrees.
900 PM EST Fri Nov 25 2016 A weak cold front crossing the Midlands and CSRA this evening will move offshore overnight.
Went with lows in the lower 30s over the entire CWA, but some 20s are not out of the question across the west where the skies clear out. A ridge of high pressure will drift east across the Mississippi Valley on Saturday, pushing out the remainder of the clouds as a surge of milder air pushes eastward. Much of the CWA should reach the lower 50s, coolest east of US-51 where the clouds will stick around the first part of the day.
With temps falling below freezing some concern for some dense freezing fog at PNC, so have introduced a tempo there.
642 PM EST Fri Nov 25 2016 Aviation Light rain showers will linger this evening before high pressure builds in to bring fair weather through the weekend.
405 PM CST Fri Nov 25 2016 High pressure will continue over the area for the next day. An upper level trough will dig down from the Pacific Northwest bringing cooler air. This moisture looks to be elevated, and with the cold front working towards the area, there could be some forcing and instability to generate some early day showers and or thunderstorms.
Thanks to continued upper level ridging, tomorrow will bring another nice day with clear skies and above normal temperatures.
1002 PM EST Fri Nov 25 2016 A weakening cold front will cross the commonwealth overnight.
/issued 129 PM CST Fri Nov 25 2016/ In the upper levels have ridge to the east with a trough well to the west. The upper trough will move ashore the West Coast on Saturday and quickly progress eastward.
Upper level trough off the PACNW coast continues to dig south, pushing little more than cloud cover over our CWA.
328 PM MST Fri Nov 25 2016 Upper level high pressure will keep skies clear, winds light and temperatures seasonal for the next 24 hours.
Cold front now across sw Ga into the Fl panhandle and will move across se Ga tonight and ne Fl early Saturday morning. Patchy fog will be possible over ne Fl tonight ahead of cold front. Cooler and drier air will spread across the area this weekend. Temperatures will be a few degrees cooler tomorrow with highs in the low/mid 70s. Best chances will be at GNV where cold front will not arrive til around 12z. LIght sw winds tonight will become northwest early Saturday morning as a cold front moves through the area.
408 PM MST Fri Nov 25 2016 Longwave upper ridging moves over the area tonight then starts to back to the southwest Saturday ahead of a low pressure system moving ashore along the west coast. High temperatures Saturday about 4F to 7F warmer per 850mb temperatures with upper 50s to low 60s.
520 PM CST Fri Nov 25 2016 Clearing line currently over central Missouri will continue to move from west to east across the area late this afternoon and this evening as a low level ridge moves into the area per the latest runs of the the RAP. Britt (Saturday Night) A moderation in temperatures is expected on Saturday night due to continued southerly return flow around broad anticyclone near the Tennessee Valley. some favored valleys that typically decouple easier will still approach the freezing mark.
Flying conditions are expected to deteriorate into the IFR and even LIFR category at all area sites overnight due to fog and freezing fog. /Issued 344 PM CST Fri Nov 25 2016/ High pressure at the surface will continue to build across the area tonight, setting the stage for ideal radiational cooling conditions in many locations. Last several runs of operational and experimental HRRR continue to support this, with legitimate threat of freezing fog across northeast OK/northwest AR. Will thus go with a freezing fog advisory from about i-40 north 06z-15z.
With the low level of the atmosphere nearly saturated in most locations, expect visibilities to continue to fall.
The low center is moving eastward pretty much along 40 N latitude. the trof axis will move inland putting the area under northwest flow and colder air will continue to infiltrate the area.
For Saturday a weak cold front will move south across the area during the day with just some additional clouds associated with it as the atmosphere will remain rather dry with maybe a sprinkle or two at the most. High temperatures will climb a few degrees above normal once again and range from the lower 70s along the coast north of Tampa Bay to the lower 80s inland portions of southwest Florida. Northeast to north winds overnight will become more northerly Saturday afternoon and evening and increase as the cold front moves south across the waters.
1012 PM EST Fri Nov 25 2016 A weakening cold front will cross the commonwealth overnight.
Temps also largely in line with patchy freezing fog likely for northern portions of the area. Freezing Fog Advisory until 9 AM CST Saturday for OKZ054>071. Freezing Fog Advisory until 9 AM CST Saturday for ARZ001-002-010- 011-019-020.
358 PM PST Fri Nov 25 2016 An incoming low pressure system will bring rain to the valley early Saturday morning and snow to the Sierra by late morning.
A weakening cold front responsible for the convection will continue to drift across S TX as it modifies. Weakening cold front, which has been slowing its roll most of the afternoon, is now just south of Pleasanton and extends east towards Victoria and west towards Del Rio. For Saturday, ridging aloft and at the surface should preclude much in the way of rain chances though we will continue to be mostly cloudy with cooler convective temperatures as low-level moisture remains on the moister side.