Aikyam-Lab/Synoptic-Bench huggingface dataset:
404 AM EDT SUN AUG 28 2016 High pressure will move east of the area today. A cold front will approach Maine and New Hampshire tonight and move off the coast monday morning.
There will be a cooling trend starting midweek with several low pressure system that will influence the area. There will also be the return of gusty winds and convection with the low pressure systems. An upper level ridge will persist over Nevada while slowly progressing eastward for the short term. The pressure gradient will be weak with the high pressure which will cause light winds across the state.
356 AM EDT SUN AUG 28 2016 A "dirty" subtropical upper ridge persists over the region, but is weakening. The persistent upper level ridge over the East Coast will slide westward over our region early in the week keeping temperatures above normal and humidity elevated.
Increasing rain chances expected today and especially Monday when a mid/upper level low meandering over HGX's CWA slowly drifts toward the middle TX coast. A sfc reflection of the low aloft will also drift southwest providing low level convergence across mainly the eastern CWA and over the waters. Therefore, went with chance pops across the east with 10-20 pops across the west today, then spreading the higher pops farther west on Monday with likely wording across the east.
No major changes were needed for the morning update as warm, moist air has enfiltrated the Upper Ohio Region under broad upper high pressure. For now, have increased POPs mainly over areas north of I 70 where the ridge and mid level temperatures show weakness, but have limited the numbers to the "scattered/chance" category given weak flow and questionable boundary focus. Low pressure is forecast to dig over Eastern Canada, with trough extension over the Northeast U.
242 AM EDT SUN AUG 28 2016 A warm front extending along the Ohio. followed by the passage of a weak cold front tonight and Monday morning.
302 AM EDT SUN AUG 28 2016 Showers and thunderstorms will develop across the region today ahead of an approaching cold front. High pressure will start to build back into the region on Monday resulting in dry weather through mid-week. The main concern for today is the approaching cold front and thunderstorm activity this afternoon. Monday will be mostly dry but slightly windy as we will be between 2 systems, a ridge building in from the west, and the low pressure system moving off to the NE. Temps across the region will be slightly cooler than previous days as the cold front brings cooler air over the region.
353 AM CDT SUN AUG 28 2016 The pattern aloft featured southwest flow across the Central Plains ahead of a closed low pressure system in Arizona. Starting out Monday morning, weak flow aloft is expected to be in place, as high pressure sits over the east-southeastern CONUS, while a weak area of low pressure is located over the desert southwest. Through the first half of the work week, that southwestern upper low continues to fill, becoming more phased in with high pressure working to reestablish itself over the south central CONUS.
148 AM EDT SUN AUG 28 2016 A large ridge of high pressure will reside over Pennsylvania through midday Sunday bringing very warm and mainly dry weather. A weak cold front will push southeast across the state Sunday night into Monday morning.
A rather robust S/WV trough now over central Alberta will be pushing east across southern Canada today and tonight. Warm temperatures area wide, with forecast highs in the upper 80s to possibly as high as the mid 90s over portions of the southwest and central near a thermal ridge at the boundary layer with 925MB temps near 32C. Cooler temperatures as a backdoor cold front drops south into the state later tonight into Monday morning.
632 AM EDT SUN AUG 28 2016 Low pressure will track east across the northern Great Lakes into Ontario today dragging a cold front across the region.
Upper low is now moving into the Four Corners Region. Some ISOLD LTG strikes continue in this area in the NE quadrant of the low center. Given the available moisture, and increasing upper forcing from the low moving eastward. Bulk shear still looks pretty weak today, so severe threat continues to look on the low side.
140 AM EDT SUN AUG 28 2016 High pressure will slide east tonight. A cold front will cross the area Sunday night, bringing the threat of showers and thunderstorms.
An upper low is crossing Alberta within the overall main upper flow which stays in Canada through the short term. Quiet weather will continue Monday with highs slightly cooler.
However, the winds will shift more northerly across Central Montana on Sunday with the passage of a weak Canadian cold front. An upper level ridge of high pressure will then build into the state Sunday night into Monday for an overall decrease in cloudiness, allowing night time temperatures to cool back closer to normal.
Further east at 00z Sunday a 700mb to 500mb ridge axis extended from Oklahoma to the Mid Atlantic. Thunderstorms are expected to develop along and just north of the warm front across far western and southwestern Kansas this afternoon, and then progress northeastward this evening.
An upper level high pressure centered off the coast of the Baja Peninsula is forecast to build gradually north and east and across southern and central California over the next 24 hours. Early morning water vapor satellite imagery shows an upper low well offshore, centered out near 35N/142W. Moisture from a tropical storm to the south of this low (T. Madeline) is being drawn north and east by the cyclonic circulation around the low. The upper low is forecast to be absorbed into a deepening longwave trough over the Gulf of Alaska and then ejected eastward as an open wave towards the northern California coast by Monday Night.
Low temperatures will range through the lower 70s tonight. Lows Sun night will again range through the low 70s.
633 AM EDT SUN AUG 28 2016 High pressure will move to the east today. A low in Quebec will drag a warm front across the area tonight, followed by a cold front on Monday.
230 AM MST SUN AUG 28 2016 A unseasonably strong low pressure system will continue to move east across northern Arizona today, and into New Mexico tonight. However a drier and cooler airmass will spread across the area today and Monday, with afternoon temperatures near or slightly below normal.
Looks like the NAM 2m temps and MET guidance were closer with the highs yesterday. A similar signal from this data suggests highs should be pretty close to what they were yesterday, and have elected to be warmer than much of the guidance. Stronger mid level ridging over the region on Monday suggests convective coverage should be on the low end, and for temps will stick with persistence and on the warm side of the guidance.
High pressure ridge at the surface and aloft centered well N of our forecast area.
/issued 826 PM EDT SAT AUG 27 2016/ The main synoptic features remain the same with high pressure over the mid-Atlantic coast ridging southwest and a tropical wave moving north of Cuba. A moderate pressure gradient continues between high pressure off the mid-Atlantic coast and the tropical wave moving north of Cuba and into the SE Gulf Sunday/Monday.
The short term forecast will continue to be dependent on the strength and position of a dirty H5 ridge that fluctuates in strength and position across our CWA through the period. An upper level high will be situated from Texas/Oklahoma eastward into the western Gulf Coast states, with an amplified upper ridge extending clear up into central Canada. With time, this upper high retrogrades westward.
it appears RAP is undergoing the low level instability and lapse rates over the northern Hill Country and northwest towards Midland.
A upper level trough in the upper Great Lakes at the start of the period will continue to move east into western Quebec province by early this evening while western and north central NE undergoes weak 500 hPa height rises today as ridging occurs over the Central Plains and the lower/middle Mississippi Valley.
High pressure will build into California from the Epac today than move further inland Monday.
Upper trough is moving overhead this morning. A PV max rounding the base of the parent trough has forced one final band of showers and isolated thundershowers this morning. Clouds should begin to scatter out by afternoon as well as the upper trough lifts northeast away from the region.
A Pacific cold front has also moved through most of the area, but has not quite moved through all of Southern Arkansas and Louisiana. This trough will quickly strengthen and dive southeast moving into the Southern High Plains by daybreak Tuesday.
Some light radar returns have developed along a cold front draped across the far southeastern counties, but the only precip reported to reach the ground has been some drizzle at Elbow Lake. Some fog lingers across southern Wadena county but there have been improvements in visibility and that should continue as the cold front pushes in and winds pick up from the north.
the combo of daytime heating, and the expected track of the low, wl result in additional SCTD convection. The highest POPS wl be focused ovr NRN AR, with lesser chcs to the S. Sig moisture return wl be limited ahead of this sys, but upr lvl support wl be quite pronounced as the upr lvl trof passes NW of AR. Cooler conds wl follow heading into the middle of the work week behind the assocd CDFNT.
705 AM CDT Mon Apr 3 2017 A nearly stacked low pressure system will lift northeast across the Ozarks region today. Otherwise expect increasing westerly winds at the surface as the low pressure system tracks to the northeast.
An additional shower is possible between 00-06z as a cold front moves through, but did not have enough confidence to mention at this time.
610 AM CDT Mon Apr 3 2017 Water vapor imagery shows upper low tracking across south central OK and quickly pushing east. Should see some dense fog this morning, primarily along the western flank of our forecast area as some cooler low level air starts to filter-in. Western edge of showers will gradually start to dissipate as the upper low quickly lifts off to the northeast. Even through there will be plenty of sun Thu as high pressure moves in, temps will still be slightly below normal. Upper ridging will then setup over the Plains for Fri into Sat which will allow temps to finally feel more spring-like.
820 AM EDT Mon Apr 3 2017 Low pressure tracking to our northwest will bring rain chances from this afternoon into Tuesday.
/issued 410 AM CDT Mon Apr 3 2017/ SHORT TERM (Now through Tuesday): Quieter conditions during the next 36 hours as the H5 trough sweeps east, being replaced with a weak ridge.
807 AM EDT Mon Apr 3 2017 This afternoon, high pressure over the Atlantic will allow for breezy southeast winds to develop.
Through the day today and into tonight, a closed circulation develops in the lower and mid levels resulting in a nearly vertically stacked system, and thus a slow migration eastbound of rain showers that develop across the west today/tonight. The highest POPs are confined to northwest ND, closest to the proximity of the surface/mid/upper level low. Will still include isolated showers far northwest through the morning as some of the high resolution models suggest weak reflectivitys making it into this area. It appears the qpf from the NAM is the highest amongst the models due to this idea. The aforementioned closed low meanders into southwest ND Tuesday morning, then becomes an open wave in the afternoon as it slides into south central ND.
Congested cumulus will develop as sfc heating takes place in the moist low levels where sfc dewpoints are in the lower 70s. Southerly pressure gradient will increase between high pressure to the east over the SW Atlc and deep low pressure lifting NE across the mid MS valley.
/issued 346 AM CDT Mon Apr 3 2017/ The upper low that brought rain to the area yesterday has moved east with high pressure briefly building in from the west. The next upper trough diving across NV today will move across NM and the TX Panhandle Tuesday. Upper ridge will build in after that with conditions warming and drying. A cold front will sag into the area Tuesday and then blow through the rest of the area Tuesday night.
843 AM PDT Mon Apr 3 2017 A low pressure trough will swing southeast across the Great Basin today, resulting in cooling, and gusty westerly over the mountains and deserts. Gusty north winds will follow on Tuesday morning below the passes and canyons for dry and warmer weather west of the mountains.
944 AM EDT Mon Apr 3 2017 Strong surface and upper level low pressure pass through the region today and tonight.
Rain is expected initially but as temperatures fall toward freezing some snow is expected. High temperatures expected to range from the mid 50s to around 60 in far eastern Colorado to the low possibly mid 60s elsewhere across the area. Low temperatures in the low to upper 30s.
A mid-level trough centered over the Ozark Plateau early this morning will accelerate northeast through the mid MS Valley today while a polar-branch vorticity lobe tracks from the northern High Plains into the mid MO Valley. On Tuesday, the 00z models continue to indicate a vigorous short- wave trough moving from the southern Rockies into the southern Plains and KS before shifting into the Ozarks Tuesday night.
An upper trough in the ID Panhandle/Western MT will move to the SE reaching Eastern ID tonight. Moisture associated with the trough will be limited to the higher terrain east of McCall and Idaho City where scattered showers are expected through this evening.
1157 AM CDT Mon Apr 3 2017 Water vapor imagery shows upper low tracking across south central OK and quickly pushing east. Should see some dense fog this morning, primarily along the western flank of our forecast area as some cooler low level air starts to filter-in. Western edge of showers will gradually start to dissipate as the upper low quickly lifts off to the northeast. Even through there will be plenty of sun Thu as high pressure moves in, temps will still be slightly below normal. Upper ridging will then setup over the Plains for Fri into Sat which will allow temps to finally feel more spring-like. However another area of low pressure will begin to affect the area late tonight and Tuesday. In the meantime, a weak cold front will move south across Kansas tonight.
As the low shifts further NE to Lake Huron by Tuesday morning, showers will taper off SW to northeast overnight. Breezy SE winds 10-15 mph ahead of the low early today shifting to NW and increasing to 15-20 mph after the low moves by tonight.
However, stable conditions, featuring multiple temperature inversions, are capping the lower levels. Maximum temperatures are forecast to reach the lower to mid 80s along the east coast beaches up to around 90 in the western interior, values around 5 degrees above normal for this time of year. /issued 807 AM EDT Mon Apr 3 2017/ This afternoon, high pressure over the Atlantic will allow for breezy southeast winds to develop.
A cold front will then sweep southward across the panhandles tonight. An upper level short wave trough was moving southeast through northwest Nevada early this morning. This short wave trough is expected to intensify as it moves southeast toward the panhandles overnight tonight. Skies will clear behind this system late Tuesday night and this will allow lows to fall below freezing across much of the panhandles.
There will be some weak instability over Wallowa county and the northern Blues that could produce a few showers through this afternoon but otherwise cool and dry across the forecast area as a ridge of high pressure begins to build into the region from the west.
Temperatures currently holding in the upper 50s and lower 60s but with such a strong southerly flow and some abatement in lift later in the afternoon, the mercury could easily bump up into the lower 70s. Chattanooga Airport, TN 73 57 78 56 / 90 50 10 10 Knoxville McGhee Tyson Airport, TN 72 57 75 54 / 80 50 10 10 Oak Ridge, TN 71 57 77 53 / 80 50 10 10 Tri Cities Airport, TN 70 54 72 49 / 80 50 20 10 TN.
740 AM EDT Mon Apr 3 2017 Low pressure over Arkansas will move northeast and track across lower Michigan tonight and into Quebec late Tuesday. High pressure will slide across the Ohio Valley Tuesday night. Low pressure will track into the Lower Lakes by mid week and linger into the weekend. Much better chance of showers this afternoon as low pressure over Arkansas. think afternoon highs will push into the lower to mid 60s. Much better chance of more widespread showers tonight as the low tracks across lower Michigan. The low will track into Quebec by Tuesday evening taking the rain showers with it. A quick respite Tuesday night as high pressure tracks across the Ohio Valley. Models continue to track slow moving low across the Lower Great Lakes the later half of the work week.
1124 AM CDT Mon Apr 3 2017 A strong short wave trough located over SRN MO this Monday morning to continue moving E through Tuesday. A Pacific cold front has also moved through most of the area, but has not quite moved through all of Southern Arkansas and Louisiana. This trough will quickly strengthen and dive southeast moving into the Southern High Plains by daybreak Tuesday.
The latest water vapor satellite imagery shows an upper trough, with several distinct circulations, in place across Texas and Oklahoma early this morning. At the surface, high pressure is in place across south central Texas, with a cold front located roughly along the Texas/Louisiana border. Otherwise, the upper level trough mentioned above will lift northeast into the mid Mississippi river valley, leaving westerly flow in the mid and upper levels across Texas. Temperatures will be warmest generally along and south of the Highway 57 corridor where some low 90s are expected. Westerly flow aloft continues on Tuesday as an upper level trough moves out of the southern Rockies into the Texas panhandle.
Although the main energy associated with the upper trough will be to the south on Tuesday, some weak energy and lingering moisture may result in a few light showers.
Upper ridging remains from the N Carib over the state and up the Eastern Seaboard today while powerful upper low moves from the Southern Plains today into the Ohio River Valley tomorrow dampens and shoves the upper ridge into the W Atlantic.
A frontal system following the ridge will spread high clouds over the area tonight with a little light rain along the coast on Tuesday afternoon.
740 AM EDT Mon Apr 3 2017 High pressure will become centered over the region today with warmer than normal temperatures. Another low pressure system will move south of the area on Tuesday. High clouds beginning to spill over upper ridge and moving into western areas of the fa. Previous Discussion: A surface and upper ridge axis of high pressure moves across the region today allowing mostly sunny skies and above normal temperatures. Another upper trof takes a very similar path as the last system tracking east across the Ohio valley and then redeveloping a secondary low center over Cape Cod Tuesday. Snow will be ongoing across the interior Tuesday evening and Tuesday night as low pressure passes to the south.
737 AM EDT Mon Apr 3 2017 High pressure will move off the east coast today paving the way for increasing clouds ahead of a storm system that will move into the lower Great Lakes tonight.
The northern wave will also mean the rain will be slow to pull out of southern MN tonight, with light rain expected to persist along an inverted trough into Tuesday morning. Like yesterday, the clouds will hold highs today in the lower/middle 50s, while continued cloud cover tonight will mean another night with lows in the 40s.
Higher amounts closer to near 8 inches is forecast for the higher peaks of the Snowies, but it is a bit too early now to come out with Advisories for the higher elevations for Tuesday. Not much snow expected for the lower elevations through Tuesday.
1124 AM EDT Mon Apr 3 2017 High pressure will move off the east coast today paving the way for increasing clouds ahead of a storm system that will move into the lower Great Lakes tonight.
Temperatures early this morning were in the lower and mid 40s. On Tuesday morning, a trough will linger across area the area.
959 AM EDT Mon Apr 3 2017 After a quiet day today, low pressure will spread showers into NY and PA early this evening. The 500mb ridge moves east of the I-81 corridor around 0z this evening, increasing the chance for showers to move in from the southwest. The best lift occurs during the day Tuesday as a fast moving warm front shoots northeastward across NY state. The NAM, Canadian Regional, and GFS all agree on the fast movement, which seems quite unusual for a warm front in this area. This instability quickly fizzles out in the late afternoon after the warm front departs.
627 AM CDT Mon Apr 3 2017 A mid-level trough centered over the Ozark Plateau early this morning will accelerate northeast through the mid MS Valley today while a polar-branch vorticity lobe tracks from the northern High Plains into the mid MO Valley. On Tuesday, the 00z models continue to indicate a vigorous short- wave trough moving from the southern Rockies into the southern Plains and KS before shifting into the Ozarks Tuesday night.
709 AM CDT Mon Apr 3 2017 /12Z TAFS/ VFR conditions prevail across the region as the low clouds have moved to the east this morning. Wind speeds will increase to 15 to 20 kt during the day Tuesday ahead of a cold front that moves through Tuesday night. High temperatures today should remain in the lower-middle 70s near the Red River where winds will favor a more southerly direction, while some 80s appear possible across Central Texas where more of a downsloping wind component should prevail. Tuesday will be a nice and likely pretty toasty day ahead of our next cold front. Breezy southwesterly winds ahead of this front should allow temperatures to warm well into the 80s, and have sided along the higher end of the guidance envelope.
A cold front will remain stalled near the Arizona border through this evening. A weak disturbance will brush northern Utah tonight and Tuesday, followed by the return of high pressure midweek. A broad trough remains draped over the Great Basin this morning, with a low level cold front stalled over southern Utah. The boundary is expected to light up even more this afternoon, as the trough continues to dig south and the jet moves over Nevada, putting southern Utah nicely into the left exit region.
Surface wise, a western Atlantic ridge extends across the Sunshine State with low pressure deepening in the southern plains. With our area lying on the western half of deep layered ridging, large scale subsidence will limit moisture, hence, zero pops have been inserted in the grids.
Sunny and Warmer. In the wake of the departing upper low, skies will be mostly sunny today with afternoon highs warming into the upper 70s to the lower 80s.
The center of the upper level low was just south of ICT and moving toward the north northeast. 50" per hour to continue for the next few hours before very gradually moving out of the region by early afternoon as the low pressure center departs. Expect clouds to decrease somewhat by late afternoon or evening to a more scattered or broken coverage, but still should see enough clouds to keep diurnal temperature swing mitigated, and highs in the low to mid 60s are expected. Next upper trough, beginning to take shape in the Pacific Northwest early this morning, follows closely behind today's wave, with isentropic upglide and frontogenesis forming overhead by late Tuesday morning.
1043 AM EST Fri Jan 20 2017 Upper trough lifting out to the NE this morning with some drier air in the middle to upper levels filtering in behind this feature. Last of light shower activity is exiting SW Virginia but residual moisture in the lowest 200 mb will help to keep clouds in place across much of the area for the afternoon. Chattanooga Airport, TN 69 54 69 55 / 20 20 70 80 Knoxville McGhee Tyson Airport, TN 66 54 68 52 / 30 10 60 70 Oak Ridge, TN 66 54 67 52 / 30 10 60 70 Tri Cities Airport, TN 65 49 65 50 / 50 10 40 60.