Aikyam-Lab/Synoptic-Bench huggingface dataset:
314 PM CST Thu Dec 10 2020 Occasional northwest gusts from 30 to 40 mph in the wake of this morning's cold frontal passage will continue through the rest of the afternoon, diminishing after sunset.
/issued 330 PM CST Thu Dec 10 2020/ Another in a series of pleasant days today with afternoon temperatures rising into the low to mid 70s below a handful of isolated cumulus. Clouds will continue to filter in overnight as moisture increases ahead of an approaching cold frontal boundary.
552 PM CST Thu Dec 10 2020 Currently, an upper-level trough is digging southward across the Rocky Mountains, picking up an open low positioned over the Desert Southwest.
Current surface analysis indicate the low spinning over northeast AZ. however, this may also prime the lower atmosphere for convective development late this afternoon. Upslope flow will favor snow showers across the southwest San Juans this evening, until the next trough dives into E UT/W CO and upper level winds switch to the northwest. Forecast high temps will be heavily influenced by clearing behind the secondary trough. Cooler air mass does filter in from the northwest, but east-central to southeast Utah and far west-central CO valleys may see warmer temperatures than observed today if clearing skies materialize prior to sunset.
Winds have started to die down in western North Dakota as high pressure becomes centered over the area, which will help with fog development tonight. The switch in wind direction will help bring in the stratus deck into my eastern counties this evening, possibly as far west as the Highway 83 corridor. Cool day on Friday with most locations not seeing above freezing for daytime highs, though winds will be light and should see decreasing clouds in the afternoon.
/issued 230 PM CST Thu Dec 10 2020/ A weak upper ridge over the area giving way to an approaching trough moving into NM this afternoon. This trough will weaken and lift northward as it moves across NM and TX. however a secondary trough comes down on the backside of it Friday.
The cold front currently across the eastern portion of the area will continue to push east through this evening. In addition, with the low level flow becoming northeasterly, the departure of the low clouds will be slow at best. Temperatures will be cooler than they have been, but still above normal.
539 PM CST Thu Dec 10 2020 (This evening through Friday) Will see an increase in clouds tonight as a closed low over AZ opens up and shifts east/northeast into the central and southern Plains tonight into the day Friday. As this occurs a cold front, currently located over southwest KS southward across the OK/TX panhandles will move southeast across the area. As the upper wave approaches this evening, the associated lift will aid in the development of showers along and ahead of the advancing cold front. The cold front will bring an end to a stretch of beautiful weather with most areas seeing temperatures some 15 to as much as 25 degrees colder on Friday.
Early afternoon WV/IR imagery depicted a upper trough axis from central MT to the Four Corners. Abundant subtropical moisture was spreading north across UT/CO into WY/NE with extensive low ceilings across the high plains. The cold front which moved through last night extended from eastern MN, western IA, through central KS and into southwest CO. Light snow will develop and spread north into the CWA this evening and continue through Friday courtesy of northeasterly upslope flow and large scale lift from the passing upper trough. Snow accumulations tonight and Friday will favor the Cheyenne Ridge and mountain ranges with one to two inches. Easterly downslope/shadowing will limit snow amounts for the Laramie Valley, with general one-half to one inch accumulations for the majority of the lower elevations. Snow will taper off Friday night with the departure of the first trough.
Dry cold front will move through the region tonight, bringing gusty wind through the wind-prone areas of Central California by the evening. A long wave troughing occurring over the western half of the country this week will bring a much needed pattern change. Air across the San Joaquin Valley remains stagnate, but we should see some improvement in that realm at least over the next 24 hours as a cold front will move through the area. As that system exits the western CONUS the upper level flow once again turns to more zonal as the Western Pacific Ridge edges east over the West Coast.
641 PM EST Thu Dec 10 2020 An upper level ridge maintains dry, warmer weather through Friday.
/issued 351 PM CST Thu Dec 10 2020/ Current surface analysis charts show high pressure centered over the southeast. An upper-level trough is located upstream over the desert southwest. Winds are light from the south-southwest as we remain on the back side of high pressure. The aforementioned upper-level trough will eject out of the southwest and initiate the development of a mature wave over the next couple of days. The low pressure center will track through the southern great plains and into the upper mid-west.
Weak high pressure at the surface to hold over the region for light winds and moderating temperatures. High pressure currently in the Gulf of Mexico will drift across the state and into the Atlantic as we head into Friday and then up the east coast.
an upper level trough is ejecting east out of the Desert Southwest and into the Southern Plains. As the upper level wave moves through the area tomorrow it will help to push through the cold front which will drop temperatures back down to below normal values.
1114 PM EST Thu Dec 10 2020 An upper level ridge will build across the region late this week.
Scattered showers will be on the increase from the northwest ahead of an approaching cold front. Otherwise, warmer than normal temperatures will continue through the period with rain chances returning to the west by late afternoon Friday. Mid afternoon surface analysis had a 1020mb high centered over the northeast Gulf that was ridging back across the Gulf coast states. The resulting high pressure surface and aloft over our CWA will result in mostly clear skies tonight and allow for the development of dense fog in the south by morning. A Dense Fog Advisory has been issued for the Highway 84 corridor.
1102 PM EST Thu Dec 10 2020 An upper level ridge will build across the region late this week.
The high-Res models and probability indices largely agree that areas of dense fog will continue to form along the coast through midnight, and expand northward as the night progresses.
139 AM EST Fri Dec 11 2020 High pressure moving off the Mid Atlantic coast will pump milder air into the region for Friday as temperatures will climb to between 10 and 15 degrees above normal.
Significantly dry air remains in place over central FL with the high pressure center solidly anchored to the region. 31" PW, mainly confined to the lowest levels of the atmosphere. Temperatures aren't as rapid to decline this evening as in nights past, with most sites still reporting values in the lower to mid 50s as of 10 pm. (previous) Favorable boating conditions with light/variable winds tonight becoming E/SE 5-10 kt on Friday as high pressure pushes offshore of the Mid-Atlantic.
1112 PM CST Thu Dec 10 2020 (This evening through Friday) Will see an increase in clouds tonight as a closed low over AZ opens up and shifts east/northeast into the central and southern Plains tonight into the day Friday. As this occurs a cold front, currently located over southwest KS southward across the OK/TX panhandles will move southeast across the area. As the upper wave approaches this evening, the associated lift will aid in the development of showers along and ahead of the advancing cold front. The cold front will bring an end to a stretch of beautiful weather with most areas seeing temperatures some 15 to as much as 25 degrees colder on Friday.
1254 AM MST Fri Dec 11 2020 Overview: Increasingly cyclonic flow aloft is anticipated over the central/western CONUS in this period as a de-amplifying upper level low (presently situated over the Desert Southwest) progresses east across the Southern Plains -- downstream of a powerful (150+ kt) northwesterly upper level jet along the Pacific coast. Forcing directly associated with the de-amplifying upper low will largely be focused south of the region.
216 AM EST Fri Dec 11 2020 An upper level ridge maintains dry, warmer weather through tonight.
1023 PM CST Thu Dec 10 2020 Occasional northwest gusts from 30 to 40 mph in the wake of this morning's cold frontal passage will continue through the rest of the afternoon, diminishing after sunset.
Surface ridging influences will continue to shift further E also.
A cold front will sweep through E OK late morning and into AR by afternoon. an upper level trough is ejecting east out of the Desert Southwest and into the Southern Plains. As the upper level wave moves through the area tomorrow it will help to push through the cold front which will drop temperatures back down to below normal values.
1124 PM CST Thu Dec 10 2020 The cold frontal passage earlier this morning and increasing high clouds have kept temperatures much cooler than earlier in the week.
/issued 556 PM CST Thu Dec 10 2020/ For the 10/00Z TAF update, an upper-level trough will swing NE of our airspace, with a cold front influencing the next MVFR/IFR cigs/vis impacts to all terminals.
216 AM CST Fri Dec 11 2020 An upper level trof will approach the region today, resulting in increasing clouds, and rain chances by afternoon from SEMO into SW IL. As the upper system and associated cold front move over/across the area tonight, we have categorical PoPs in for rain.
1059 PM CST Thu Dec 10 2020 The cold front currently across the eastern portion of the area will continue to push east through this evening. In addition, with the low level flow becoming northeasterly, the departure of the low clouds will be slow at best. Temperatures will be cooler than they have been, but still above normal.
A weak upper trough is currently moving across the forecast area this evening. There is a secondary cold front which is just very slightly stronger moving over the Cascades at this time. It will also bring increased mixing which will help to lift and move out any left over patchy fog/stratus in the lower elevations.
137 AM EST Fri Dec 11 2020 An upper level ridge maintains dry, warmer weather through tonight.
34 micron satellite water vapor channel shows a mid level trof moving across northeastern Colorado this morning. As such, overall WSR-88D reflectivities have been less than impressive due to the drier air advecting in ahead of the synoptic trof.
High pressure in place over the state will shift to the NE and out over the Atlantic through Saturday keeping light E/SE winds in place and gradually warming/moistening conditions. Highs this afternoon will be in the lower to mid 70s.
(Today and tonight) Short wave trough will move across the area today, with associated cold front entering the Big Country this afternoon and moving across the rest of the area this evening and overnight. Highs this afternoon will range from the 60s across the Big Country, to the lower and middle 70s across the rest of the forecast area.
418 AM PST Fri Dec 11 2020 Today will be a little cooler for most areas with a warming trend for the coast and valleys during the weekend.
359 AM MST Fri Dec 11 2020 Dense fog and areas of freezing drizzle over North Central MT will give way to increasing chances for snow showers this afternoon. Temperatures today will be a bit cooler than they have been.
558 AM CST Fri Dec 11 2020 High pressure sliding into the area today will lead to quiet conditions this weekend for most. Favorable northeast flow shouldn't be a problem since high pressure over northeast Minnesota will tighten the pressure gradient in conjunction with a strong low pressure system moving through the lower Great Lakes. However, model soundings show that the higher moisture and steep lapse rates will likely be confined below 1 km.
406 AM CST Fri Dec 11 2020 Rain will move into the area this evening into Saturday morning as a cold front moves through. Cooler temperatures will follow with highs reaching the upper 50s and low 60s with lows dipping down into the upper 20s and 30s. Another upper-level trough will develop out of the Rockies and move south of the forecast area.
A upper level trough is ejecting out into the west central Plains. Rain, cloud cover, and weak CAA will keep highs in the upper 30s across northwestern Missouri sloping to the lower 50s across central Missouri. Although snow will fall before 09Z tonight temperatures will remain above freezing.
416 AM MST Fri Dec 11 2020 Current surface analysis shows high pressure centered over ND, with an area of low pressure over central CO. An inverted trough extends north from the low into WY. Upper level analysis shows trough over the central and southern Rockies, with strong jet wrapping around it from the west coast to the desert southwest and into the southern and central Plains. An area of low pressure is also located off the southern British Columbia coast.
(Today and tonight) An upper trough across the southwestern U. With increasing Pacific based moisture transport coming through the trough at mid-levels along with gulf based low level moisture advection, would also expect the precipitation to increase and become more showery as it moves across central Oklahoma and eastward. For this afternoons high temperatures, the latest NBM was a bit warm biased with the cooler Canadian based air coming through, so instead used the Superblend. The NBM was more spot on with tonights low temperatures as nearly all areas except our southeast should be dropping at to well below freezing.
As this occurs drier air aloft will move in as a broad trough develops across the CONUS and our upper level flow turns more zonal. At the surface, the previously advertised cold front has made its way through the Texas Panhandle and should be through the FA just after dawn. Surface winds will begin to shift to the west-northwest early this afternoon as surface lee side troughing occurs in NE NM. At the surface a second weaker cold front will begin to push southward. Northerly winds behind the surface cold front will over take the CWA by the evening with lows falling below freezing across the area. Into Saturday evening, some amplification of cyclonic flow will occur across the Great Basin as this feature attempts with another trough across the western Canadian prairies.
501 AM CST Fri Dec 11 2020 Much warmer temperatures across the area this morning as region is firmly entrenched within WAA regime downstream of an approaching upper trof pushing east of the Four Corners. The boundary is expected stall across SE LA and the NW Gulf SAT night, then retreat quickly NWD SUN as a second upstream trof digs into the SRN Plains. 13 A modest and at times gusty onshore southerly flow will continue through late tonight as a cold front approaches the region.
Sounding profiles thru the day into tonight keep the low level moisture up thru 925 mb in place in weak cold advection. Some small holes in the low clouds may form mid afternoon for that reason did decrease sky a tad based on collab.
321 AM CST Fri Dec 11 2020 Cold front currently moving into western sections of Osage/Pawnee counties early this morning with boundary extending southwest into central Oklahoma. Precipitation will begin to shift east of the area this evening as cold front pushes into central Arkansas.
A closed upper level low will move across Washington into west-central Montana this afternoon and evening.
422 AM CST Fri Dec 11 2020 (Issued 422 AM CST Fri Dec 11 2020) Today through Saturday: Northeasterly winds and increasing cloud cover are in store for southern Wisconsin this morning ahead of the approaching low pressure system.
No advisories are anticipated w/ the longer duration, but some of the higher peaks of the Snowys and Sierra Madres could see close to 6 inches by the end of the weekend.
250 AM MST Fri Dec 11 2020 Current surface analysis shows high pressure centered over ND, with an area of low pressure over central CO. An inverted trough extends north from the low into WY. Upper level analysis shows trough over the central and southern Rockies, with strong jet wrapping around it from the west coast to the desert southwest and into the southern and central Plains. An area of low pressure is also located off the southern British Columbia coast.
Early this morning, upper low is spinning out into the central High Plains (southwest NE/northwest KS) with deformation zone mid-high cloud shield stretching east-northeast across much of our forecast area. Readings don't drop off too sharply tonight, with lows generally in the lower-mid 20s under persistent extensive cloud cover. Clouds and northerly flow will be more persistent through the day, with temperatures a few degrees cooler than today, mainly lower-mid 30s.
350 AM PST Fri Dec 11 2020 A cold front will move through the region today, bringing gusty wind through the wind-prone areas of Central California during the day. Another cold morning in-store for Central California as overnight low reach for the freezing mark this morning. Therefore, will keep the wind advisory for the Kern County Mountains and Desert in effect as enough energy from the strong jet is mixed down into the higher terrain of the favored area.
- Some potential for snow Wed Guidance is spread out on the next wave of low pressure to track through the central part of the U.
An approaching cold front will bring widespread showers to the area tonight. The cloud cover will continue to increase from the west today in the warm advection regime in advance of a mid/upper level trough moving out of the Plains today and into the mid MS valley tonight. Also, the system will be in a weakening state by the time its attendant cold front moves into the area tonight. /GG/ This weekend: By Saturday morning, the cold front and associated band of showers will continue to push across east/southeast MS, clearing the area by midday. However, we will remain in a rather progressive pattern as the longwave trough remains centered over the CONUS.
Rain returns late Saturday as a low pressure system advances into the Ohio River Valley. Previous Discussion: High pressure will keep the area dry today. A low pressure system will travel nely through the western Great Lakes on Saturday, coincident with the left exit region of a subtropical jet streak.
Upstream of this feature, a closed low was located over the Alaska Panhandle. A trough of low pressure extended south of this feature into western Oregon.
548 AM CST Fri Dec 11 2020 (Today and tonight) Short wave trough will move across the area today, with associated cold front entering the Big Country this afternoon and moving across the rest of the area this evening and overnight. Highs this afternoon will range from the 60s across the Big Country, to the lower and middle 70s across the rest of the forecast area.
/issued 406 AM CST Fri Dec 11 2020/ Rain will move into the area this evening into Saturday morning as a cold front moves through. Cooler temperatures will follow with highs reaching the upper 50s and low 60s with lows dipping down into the upper 20s and 30s. Another upper-level trough will develop out of the Rockies and move south of the forecast area.
The cloud cover will continue to increase from the west today in the warm advection regime in advance of a mid/upper level trough moving out of the Plains today and into the mid MS valley tonight. Also, the system will be in a weakening state by the time its attendant cold front moves into the area tonight. /GG/ This weekend: By Saturday morning, the cold front and associated band of showers will continue to push across east/southeast MS, clearing the area by midday. However, we will remain in a rather progressive pattern as the longwave trough remains centered over the CONUS.
The area will be under some short-lived ridging, but this will quickly be replaced overnight as another system already moving into the the Pacific NW will move into the area. This being driven by an upper trough actually cutting off a low briefly over northern Wyoming (which is a great position for us for forcing) for Friday night and Saturday.
320 AM MST Fri Dec 11 2020 Water vapor showing the first upper trof just moving into Southwest Nebraska now with slightly drier and subsident airmass just behind it over the mountains/foothills. Subsidence and slight drying will be moving towards 00z and tonight as weak ridging aloft moves in.
Lower vis and ceilings will become possible later today and into most of the night as a cold front works through with rain. /issued 501 AM CST Fri Dec 11 2020/ Much warmer temperatures across the area this morning as region is firmly entrenched within WAA regime downstream of an approaching upper trof pushing east of the Four Corners. The boundary is expected stall across SE LA and the NW Gulf SAT night, then retreat quickly NWD SUN as a second upstream trof digs into the SRN Plains. 13 A modest and at times gusty onshore southerly flow will continue through late tonight as a cold front approaches the region.
Little of near term concern as encroaching high cloud cover negates weak moisture flux and potential fog development invof developing warm frontal zone through cntrl IN. As a result substantial downstream moisture flux expected commensurate with rapid deepening of frontal scale/jet induced forcing with significant rains along sfc cyclone track through nw zones late tonight and Sat morning. Lingering wrap around with some lake enhancement possible Sat night however marginal low level temps present for any snow accumulation nw per lake plume modification and subdued background thermal trough. Lake response diminishes by daybreak timed with collapse of low level thermal troughing and increasing dry entrainment.
358 AM CST Fri Dec 11 2020 High pressure sliding into the area today will lead to quiet conditions this weekend for most. Favorable northeast flow shouldn't be a problem since high pressure over northeast Minnesota will tighten the pressure gradient in conjunction with a strong low pressure system moving through the lower Great Lakes. However, model soundings show that the higher moisture and steep lapse rates will likely be confined below 1 km.
/Issued 321 AM CST Fri Dec 11 2020/ Cold front currently moving into western sections of Osage/Pawnee counties early this morning with boundary extending southwest into central Oklahoma. Precipitation will begin to shift east of the area this evening as cold front pushes into central Arkansas.
132 PM CST Fri Dec 11 2020 Upper trough swinging through today as the next low comes ashore WA coast. This low will open up to a trough as it dives down across WY with the energy rotating through the base.
Cold front will bring a round of rain at the end of the TAFs. Chattanooga Airport, TN 51 61 44 59 38 / 40 60 10 10 60 Knoxville McGhee Tyson Airport, TN 48 62 44 57 35 / 10 60 20 10 70 Oak Ridge, TN 48 59 44 56 34 / 20 60 20 10 70 Tri Cities Airport, TN 42 58 42 55 34 / 0 40 30 10 70.
Otherwise, a rather quiet day expected, with the main question being - will we clear out some the low clouds.
302 PM EST Fri Dec 11 2020 A low pressure system will bring widespread rain to the area tonight and tomorrow.
1159 AM CST Fri Dec 11 2020 Expect MVFR to IFR conditions or lower through tonight as rain moves through the state along and ahead of a cold front.
1234 PM MST Fri Dec 11 2020 A broad upper-level trough covers most of the CONUS, with a low pressure system moving over the Pacific Northwest. At the surface, high pressure sits over ND, and an inverted trough persists over WY. Approaching Pac NW upper low and little change in the surface pattern overnight will result in light snow across northeastern WY/far western SD tonight into Saturday morning. Upper low will weaken as it slides south of the area Saturday. Dry weather will then resume beneath northwest flow, and cooler air will filter into the region this weekend.
352 PM EST Fri Dec 11 2020 High pressure will prevail through late Saturday.