Aikyam-Lab/Synoptic-Bench huggingface dataset:
306 AM CST Fri Jan 27 2017 Mid level trough axis is rotating through from the central plains northeast into the Great Lakes area. Mean flow within this layer should carry the cloud cover southeast by mid morning, bringing a warmer and sunny afternoon over northeast Kansas. Could see a few flurries in mainly northeast areas as at least one wave rotates south-southeast around the upper low in eastern Canada.
Overall temperatures will slowly moderate through the period, but generally remaining cool w/ upper troughing in place.
Temps tonight could bottom out around the freezing mark for a majority of the area. However, no precipitation is expected with such dry air in place in the lower levels.
An upper ridge will build over the Pacific Northwest Friday and Saturday, bringing partly sunny and mild days to Western Washington.
940 PM PST Thu Jan 26 2017 High pressure will build over the Inland Northwest.
A short wave barely noticeable in water vapor imagery continues to drop through the NW flow with the long wave trough.
The long-wave pattern across CONUS and Canada consists of an amplified ridge over the west extending north to the Arctic Ocean, and a trough centered around Hudson Bay.
1140 PM CST Thu Jan 26 2017 Mostly sunny skies and slightly warmer temperatures have returned to the local forecast area this afternoon. expect overnight lows to be a bit cooler than this morning with these near ideal radiational cooling conditions. the winds will increase a bit across the region making it feel a bit cooler than it otherwise would. A ridge of high pressure is expected to amplify across the west coast to start the extended periods making for fast moving northerly flow across the region.
A few flurries may get shaken out of the low clouds as well this morning. Any breaks in the clouds that linger into the overnight should fill in later tonight with resurgence of low level cold air advection and passing low to mid level short wave trof.
1256 AM EST Fri Jan 27 2017 High pressure and cooler temperatures will gradually overspread the area through Saturday.
A big ridge over the western United States will bring a northwest wind flow aloft into the region.
417 AM EST Fri Jan 27 2017 A trough of low pressure will approach from the northwest today and will cross the region tonight.
Light northeast winds will continue through the night as high pressure settle across East Texas. Breezy northeast winds expected to continue into the overnight hours Friday night as a coastal trough develops in the vicinity. Rain chances return Friday afternoon as moisture begins to increase courtesy of onshore flow ahead of a deep 500 mb trough approaching from the west.
206 AM CST Fri Jan 27 2017 A longwave upper level trough over the region will bring several disturbances down from the northwest over the next few days. highs today will be mainly in the lower 40s.
Temperatures should fall into the lower 30s north to lower 40s coastal. /ISSUED 528 PM CST Thu Jan 26 2017/ VFR conditions are expected to prevail through the TAF period with northerly winds 5-10 knots veering to the northeast by Friday afternoon as surface ridging builds farther into the region. Elongated trof stretching from the ne states into the 4-corners area will sag sse going into the weekend as ridge expands northward along the west coast.
High pressure at the surface will keep the low levels dry with northerly wind through the period. /issued 346 PM CST Thu Jan 26 2017/ Mid-afternoon sfc analysis shows high pressure centered over the Pacific NW ridging sewd through the Rockies and srn Plains to the wrn Gulf Coast region. while much cooler temps mostly in the 50s have been reported. Main story will be the cooler air as the continental high builds over.
1122 PM EST Thu Jan 26 2017 A cold front will move east of the region overnight.
259 AM CST Fri Jan 27 2017 A broad, nearly east-west oriented trough remains in place today through the weekend, preventing any meaningful moisture return from the Gulf.
250 AM CST Fri Jan 27 2017 A long wave trough is setting itself up over the Eastern portions of the US which will provide a persistent Northwest flow over the region for the short term.
The front will shift winds to the west northwest and usher in cooler and much drier air across the region. High temperatures will be closer to average after today's near record warmth, ranging from the lower 70s to around 80. The short term period will feature dry weather on Saturday as high pressure briefly ridges into the region from the north.
The cold front continues to make slow progress southward and is approximately located from near Punta Gorda to Sebring at this time. For today we will see the boundary exit the forecast area early this morning with northerly winds ushering in cooler drier air which should help skies gradually become partly cloudy from north to south during the day. Temperatures will be much cooler than yesterday and only climb into the mid 60s Nature Coast to the lower 70s south. Tonight weak high pressure will build over the area with partly cloudy skies expected as some clouds continue to stream across the gulf and the Florida peninsula. Low temperatures will range from the mid to upper 30s across the Nature Coast to the lower 50s southwest coast.
341 AM CST Fri Jan 27 2017 Today and tonight: Dry weather and cooler than normal temperatures are expected. Early morning water vapor imagery/surface analysis had a negatively tilted trough axis from the Great Lakes region extending southwest back across the desert southwest. Latest surface analysis had a ridge axis from the western CONUS extending across the southern plains and our CWA that will remain in place through tonight. Highs today will be in the low to mid 50s followed by a night of at or below freezing temperatures.
331 AM CST Fri Jan 27 2017 A positively tilted and elongated upper level trough will move southward through our area today. Highs today will be a couple of degrees warmer than the previous day, and slightly below normal for late January.
315 AM EST Fri Jan 27 2017 Low pressure will remain over eastern Canada through the weekend with high pressure extending from the plains to the southeastern part of the country.
Zonal flow aloft will continue tonight into Friday morning over South Texas through the short term, with the base of a east-west oriented trough axis sliding south through the southern Plains and southern Rockies. This will lead to an increase in cloud cover west to east Friday along with slightly cooler temperatures than today, especially out west.
1207 AM EST Fri Jan 27 2017 A cold front will move east of the region overnight.
301 AM EST Fri Jan 27 2017 With a broad upper level trough now in place over North America east of the Rockies, expect a much more winter-like pattern during the upcoming forecast period. With the area embedded within northwest flow regime within this upper trough, cold air will be free to spill into the Great Lakes from Canada during this entire 7 day forecast.
321 AM EST Fri Jan 27 2017 A broad upper level trough will persist over the eastern part of the country for the next few days holding temperatures near normal if not slightly below normal. Zonal upper flow was over the southern tier of states this morning, while a positively tilted upper trough extended from Quebec to Southern CA. At the surface, as a cold front drifts off the east coast today, moist upslope flow will impinge on the Western NC Mountains bordering TN. Snow totals for this morning and tonight will be around one inch at the highest peaks of the Northern NC Mountains bordering TN, with far lighter amounts over the Smoky Mountains tonight. Overall, the upper pattern remains the same as expected before, that is to say dominated by a broad upper trof through the weekend.
Cloud cover and only very weak cold advection will result temperatures nearly steady today, ranging from the upper 20s over the high terrain of the Alleghenies, to the upper 30s across the Lower Susq Valley. As with storm totals over the Laurels (that could reach 8-10" on the highest ridges west of RT 219 by early Saturday, the 5-8" of expected snow accumulation will fall over a long. A long wave pattern of deep troughing in eastern Canada and good flow into the Great Lakes and Mid-Atlantic from the Northwest Territories will result in a mainly dry but lake-effect filled time of seasonable (read: cold) temperatures. Global model and ensemble consensus keeps a mean trough in the Eastern U.
Flow backing slightly this morning ahead of the next trough could favor this area to spread back northward. The next trough passing through today may favor an uptick in shower coverage across the area as it enhances low level convergence over southern MI. Cooler air working across the lakes tonight behind the next trough may also encourage an uptick in shower coverage. With a broad upper level trough now in place over North America east of the Rockies, expect a much more winter-like pattern during the upcoming forecast period. With the area embedded within northwest flow regime within this upper trough, cold air will be free to spill into the Great Lakes from Canada during this entire 7 day forecast.
/issued 145 PM CST Thu Jan 26 2017/ A quiet, cool day across the area today under the influence of a broad upper trough extending across the CONUS, and quasi-zonal flow aloft over the region. A cold front is expected to edge into northern portions of the area late tonight, and slowly push southward on Friday. An east- northeasterly wind shift will accompany the front, along with cooler temperatures. Light snow will be possible during the overnight and early morning hours where temperatures are expected to be below freezing, with rain expected further south toward the Rio Grande Valley.
338 AM EST Fri Jan 27 2017 Low pressure will remain stalled over Eastern Canada through this weekend.
Passage of a weak trough may yield some renewed snow shower activity on Friday.
324 AM EST Fri Jan 27 2017 Low pressure will remain stalled over Eastern Canada through this weekend.
High pressure remains over the Pacific Northwest this evening. Added patchy freezing fog around North Powder after seeing fog on webcams. Felt low temperatures tonight were too cool in the lower elevations and trended them up a few degrees closer to the low temperatures the last couple of nights. An upper level ridge will move over WA and OR tonight and remain overhead through the weekend. Subsidence from the ridge will keep the area dry. Surface inversions will strengthen and lower as the ridge moves over the area. Air Stagnation Advisories have been issued for the Yakima and Kittitas Valleys today and for the Lower Columbia Basin and adjacent areas tomorrow.
Colder NW flow is establishing behind a secondary cold front that passed late this afternoon. As with storm totals over the Laurels (that could reach 8-10" on the highest ridges west of RT 219 by early Saturday, the 5-8" of expected snow accumulation will fall over a long. A long wave pattern of deep troughing in eastern Canada and good flow into the Great Lakes and Mid-Atlantic from the Northwest Territories will result in a mainly dry but lake-effect filled time of seasonable (read: cold) temperatures. Global model and ensemble consensus keeps a mean trough in the Eastern U.
Low pressure will remain over Atlantic Canada through Saturday.
803 PM PST Thu Jan 26 2017 High pressure will build over the Inland Northwest.
Declined the dewpoint temperatures a few degrees to account for the cooler and drier airmass settling in across the Four-State Region. Overnight, expect light WNW/NW winds which will cause the temperatures to fall to the low 30s south of I-20 and areas north will be near the upper 20s. Saturday, another front will bring a reinforcing shot of the cooler air, but no rainfall is expected with its passage.
Highs tomorrow will be slightly warmer with temperatures in the upper 30s to lower 40s in the east. Meanwhile with fairly decent flow in the lower to mid lvls along with decent sfc gradient across nern CO both days there will be gusty NNW winds across the plains. Meanwhile with downslope flow developing should see warmer temps on Mon with readings in the 55 to 60 degree range across nern CO. Over nern CO another surge of cooler air may affect the plains which will keep temps nr seasonal levels.
326 AM EST Fri Jan 27 2017 An upper level trough stretches over most of the CONUS early this morning, with an upper jet streak over the southeast.
334 AM CST Fri Jan 27 2017 An elongated trof at 500 mb stretching from eastern Canada southwest through the southwest U. Weak low amplitude waves rotating southeast from the longwave trof will push across our area over the next 24 hours bringing cloud cover and scattered flurries.
1140 PM CST Thu Jan 26 2017 At 3 PM, a trough was moving south through central Minnesota and central Wisconsin. From tonight into Friday morning, a short wave trough will move south through the region. As a result raised the low temperatures by 2 to 4F.
Water Vapor satellite trends this afternoon place an upper level low located over Quebec. low level wrap around moisture associated with this low is producing a 2500-3500 ft deck of clouds over portions of the Mid-South, especially north of I-40. Cool temperatures are expected to persist across the region into the weekend as an upper level trough will remain over the Eastern United States.
Light and mainly northeast winds overnight will be reinforced on Friday as a weak cold front moves through the area, PREV DISCUSSION. Temperatures on Friday will be a little cooler than today as some mid and high clouds develop across the area by afternoon. Highs will range from the upper 40s to around 50 across the Big Country, to the lower 50s elsewhere.
253 AM CST Fri Jan 27 2017 A closed upper low continues to move to the east/northeast across southeastern Canada, with the axis of a broad upper trough extending into the desert SW. These clouds have kept temps from dropping too much overnight, with 2 am temps in the upper 30s, while areas that are clear have fallen into the lower 30s. Winds have remained in the 5 to 10 kt range, so most locations have wind chills at or below freezing. This will continue through the remainder of the overnight hours and lows will bottom out in the low to mid 30s by daybreak. Meanwhile, the upper trough will begin to amplify as it moves into the MS Valley. Although forecast guidance is still differing on the overall solution of this trough, the timing and placement of its movement is very similar.
Main 500 mb trough moving south of the fcst area and a temporary 500 mb ridge and drier air at 850 mb is moving southeast. Question becomes how far east will it get? RRV and west should start out the day with some sunshine before additional stratocu drops south into NE ND and NW MN Friday aftn assoc with next 500 mb trough.
422 AM EST Fri Jan 27 2017 Canadian high pressure will remain over the CWA through Saturday keeping us dry through the short term.
Upper level ridge remains in place along the West Coast for continued north-northwest flow aloft over Montana through late Friday evening. Upper ridging is beginning to exert its influence upon the region, with warmer and drier air dropping south into the region. Temperatures will continue to steadily warm as the combination of drier air aloft and stronger southwest downslope winds will allow for temperatures to reach well into the 30s Friday and then reach the lower 40s by Friday. The primary exception will be over sheltered valleys of SW MT where strong inversions will keep temperatures much cooler.
An area of low pressure will remain just west of the CWA tonight into the day Tuesday before pushing across and east of the area Tuesday night.
/issued 916 PM CDT MON JUL 4 2016/ A slow moving, positively-tilted upper level trof centered over the Ozark Plateau will continue to aid shower and thunderstorm development downstream over the Midsouth tonight and early Tuesday. 00Z NAM continues to depict additional shower and thunderstorm development over north MS after 3 AM, and later into west TN, in the vicinity of an elevated warm front. Upper level trough moving through the Mid-South as this discussion is being typed. The upper level trough does really move out of the Mid-South until Tuesday afternoon so there is a continue possibility of showers and thunderstorms, however, they decrease as the evening progresses tonight and then increase again Tuesday afternoon as we get some more heating and instability is increased again.
916 PM CDT MON JUL 4 2016 A slow moving, positively-tilted upper level trof centered over the Ozark Plateau will continue to aid shower and thunderstorm development downstream over the Midsouth tonight and early Tuesday. 00Z NAM continues to depict additional shower and thunderstorm development over north MS after 3 AM, and later into west TN, in the vicinity of an elevated warm front. Upper level trough moving through the Mid-South as this discussion is being typed. The upper level trough does really move out of the Mid-South until Tuesday afternoon so there is a continue possibility of showers and thunderstorms, however, they decrease as the evening progresses tonight and then increase again Tuesday afternoon as we get some more heating and instability is increased again.
GFS keeps PW values on the high side without any appreciable change in the airmass. Cold front slated for the later weekend time frame will knock temperatures down a bit and bring the PW values back towards normal with some drying aloft.
755 PM EDT MON JUL 4 2016 A warm front will lift north and track east over the Ohio Valley tonight. High pressure will build behind it on Tuesday, and a return to southerly flow will occur Tuesday night.
Most (if not all) of this activity is expected to ride along mid level ridge and remain north of southeast TX, however will have to keep a close eye on the far northern counties, especially Houston county, early in the morning hours.
Only mid to high level moisture expected with high pressure building in.
1139 PM CDT MON JUL 4 2016 Water vapor imagery shows a weak upper impulse tracking across eastern OK into southern MO, with a much more potent trough over southern British Columbia/Alberta. Will keep storm chances in Thu night across most areas with the higher chances across southeast KS where capping will be minimal.
Ahead of this trough, a shallow cold front is slowly pushing into northern Utah. This cold front will cause overnight mins across northern Utah to be a few degrees cooler then they were last night. However, there is a 40 percent chance that a weak cold front will make it to the terminal and shift winds to the northwest briefly in the 06-09z timeframe.
631 PM CDT MON JUL 4 2016 Elongated ridge from southern Cal to the southern plains. A trough is across the southern Miss Rvr valley with another trough over the sw Canada and the Pacific NW. A cold front stretches from the Canadian low to the SW across the Rockies. A few isolated storms possible across the higher terrain to the west this evening which will slowly drift in the zonal flow to the east. Impact to the western zones is possible with a better chance albeit still a slight chance, closer to the pine ridge later this evening. Another warm day ahead of an approaching cold front. Compressional heating will push temps up a few more degrees from today with the exception of far nw zones where cold front will halt the warmup and keep temps around 90.
Vigorous short wave trough over northeast New Mexico is expected to traverse the panhandles overnight. Low level moisture combined the lift from the short wave trough should be sufficient to create showers and thunderstorms.
Temperatures are running several degrees cooler this evening. The trough will deepen slightly on Tuesday and will likely result in the coolest day this week with temperatures a couple of degrees cooler than today for most areas with places in the delta staying about the same as today. The trough will remain over the region this week to help keep a deeper marine layer along the coast, moderate flow through the delta and cooler than normal temperatures over the interior.
Otherwise high pressure will continue to build over the region with precipitation chances minimal on Tuesday. The lowestarea of convection is shaping up to be northern Arkansas where morning convection started and main lift from the short wave has pushed east. Afternoon temperatures have been held down a bit today due to the clouds and rain chances, with the upper 70s to lower 80s in the north, to the lower 90s far south. On Tuesday a limited chance of convection as models are showing the upper high pressure ridge building eastward over the region.
858 PM EDT MON JUL 4 2016 Low pressure has brought rain to the region for tonight and Tuesday morning. Those residual showers will cease from the west on Tuesday as the main mid level trough slides eastward.
727 PM EDT MON JUL 4 2016 Low pressure has brought rain to the region for tonight and Tuesday morning.
A broad upper trough is swinging across the Divide this evening, and producing a southwesterly flow aloft over Northeast Montana. Later tonight the base of the trough nudges into the Little Rockies, which will produce more widespread showers and thunder late tonight through Tuesday morning. Hot high pressure to the south has made it as far north as northern Nevada and northern Wyoming, while a Trough of cooler Pacific air resides over Washington, British Columbia, and Alberta. The trough will then press south allowing cooler air aloft which should mix down over the next couple days.
1145 PM CDT MON JUL 4 2016 Elongated ridge from southern Cal to the southern plains. A trough is across the southern Miss Rvr valley with another trough over the sw Canada and the Pacific NW. A cold front stretches from the Canadian low to the SW across the Rockies. A few isolated storms possible across the higher terrain to the west this evening which will slowly drift in the zonal flow to the east. Impact to the western zones is possible with a better chance albeit still a slight chance, closer to the pine ridge later this evening. Another warm day ahead of an approaching cold front. Compressional heating will push temps up a few more degrees from today with the exception of far nw zones where cold front will halt the warmup and keep temps around 90.
1243 AM EDT TUE JUL 5 2016 Upper level ridging will provide dry and warmer conditions today. Areas of fog and low clouds this morning should scatter out by late morning or early afternoon allowing highs to reach the low to mid 80s.
853 PM MDT MON JUL 4 2016 Have had to reverse course, as the high res models turned out to be correct and ISOLD storms have developed along an outflow boundary moving east across the SE Plains. Light zonal flow aloft will continue through tomorrow, with dry and warmer air spreading across the CWA. Isolated convection over the mts this aftn has been very hesitant to move off the higher terrain, and short range models indicate that much of the activity will be done by midnight. Temps will climb into the 90s to near 100 F for the e plains, and into the mid to upper 80s for the high valleys.
922 PM EDT Mon Jul 4 2016 A warm front will lift north through the area tonight. A wave of low pressure will also ride along the boundary overnight.
728 PM EDT MON JUL 4 2016 A cold front will cross the region later Tuesday and stall.
have to monitor a high pressure ridge axis continues to bisect the coastal waters. A ridge of high pressure resides across central FL through the week with a moist air mass in place and light winds.
Some models hold this together as it moves east, likely due to the low level jet. Deep convection firing along the surface trof trough west of Rolette and Rugby with Severe Thunderstorm Warnings along and ahead of that area. Following trof passage this evening. expect a west to northwest blayer flow and some slight drying in the low levels. Flat and muddy H5 flow will bring second weak shrtwv across the area early on Tuesday so expect sct tstms but somewhat cooler overall temps.
Chattanooga Airport, TN 74 90 73 92 / 60 60 40 50 Knoxville McGhee Tyson Airport, TN 73 86 72 89 / 60 60 40 50 Oak Ridge, TN 72 86 72 89 / 70 60 30 50 Tri Cities Airport, TN 69 85 70 86 / 60 60 50 40.