Aikyam-Lab/Synoptic-Bench huggingface dataset:
317 AM EST Wed Dec 13 2017 Cold and windy conditions are expected tonight in the wake of a strong cold front. High pressure will briefly build in to the area Wednesday. The strong cold front has shifted to the east of the area this evening, with gusty northwesterly winds in its wake and mostly clear skies. Expect lows tonight will generally range from the lower 20s NW to the upper 20s S/SE.
Even if we don't see 1/4 mi visibilities in some of these areas, the risk of ice depositing from freezing fog is there. We have freezing fog included for areas farther northeast across the Snake Plain, but we didn't issue any headlines for now.
Mostly rain so far, but with below freezing road temps across most of the area and wet roads freezing later in the morning slick conditions will be possible later on Wednesday.
Enhanced north to northwest winds and rough seas will continue through tonight as high pressure builds into the region. Winds and seas will gradually improve through the morning hours as high pressure builds in.
1130 PM PST Tue Dec 12 2017 Strong high pressure will persist through Thursday night except for a weak wave tonight into early Wednesday which may bring snow flurries to the region. The lowlands of eastern Washington and north Idaho will continue to be covered by low clouds.
1204 AM EST Wed Dec 13 2017 Dry high pressure will build across the region tonight and will remain through Thursday.
A cold front will bring a northerly wind shift through the terminals Wednesday with a period of breezy winds in the afternoon. /issued 303 PM CST Tue Dec 12 2017/ Atmosphere will undergo a significant change from the blocking pattern over the western Conus that we've seen for the past few days with a more progressive pattern evolving. This merger of northern and southern stream systems will result in a fairly sharp, full latitude positively tilted upper trof which will swing across the region Thursday night.
shifting to west/northwest during the afternoon with a cold front) should remain below Red Flag criteria.
Associated sfc cold front now well offshore of the eastern seaboard this morning. Aloft, latest upper air analysis shows strengthening upper trough taking on a negative tilt, as it slides offshore of the Mid- Atlantic coast and lifts across the northeast into New England. Despite westerly flow aloft, and a mainly clear sky, afternoon high temperatures will struggle to climb into the low to mid 30s in most spots, which represent highs ~15-20 deg below normal. Early morning lows in the low to mid 20 inland.
1106 PM CST Tue Dec 12 2017 The main concern for the short-term forecast continues to be the high fire danger for tomorrow. Conditions will become windy, both ahead of a weak front/trough and even more so in the wake of that feature.
Proton Previous Discussion: An upper ridge near the West Coast will continue to reign supreme through Thursday while disturbances drop southeast in the northwest flow into the Northern Plains or the Great Lakes. Since this storm pattern is to our east, we'll remain above normal in the temperature department, but it will be a bit cooler than today. The first clipper this afternoon is dropping into southern Manitoba with a Pacific cold front sweeping through the area this afternoon/evening. 15-20 degrees cooler than today, but still about 10 degrees above normal. TFJ The next wave on NW flow aloft drops SE across the region Wednesday Night with another cold front. Thursday will be mainly dry and cooler with highs in the 30s in most areas.
Current air/road temperatures suggest mainly rain within and west of the valley, with freezing rain east of the valley. With that said, had a situation here at the office in Grand Forks where the rain occurred with air temperature above freezing while road temperatures where below freezing. Short waves continue to roll over the upper ridge over western North America and drop into the Northern Plains. Next upper level trough over the eastern Pacific will approach the forecast area on Fri. Long wave pattern maintains a long wave ridge over the eastern Pacific or the West Coast. Long wave trough remains over eastern Canada and the northeast US. Current air temps are above freezing so will keep FZRA mention out for now although some pavement temps may be near the freezing mark and cause slick runways.
Temperatures will cool back down Wednesday night and Thursday in the wake of the passing cold front.
338 AM EST Wed Dec 13 2017 High pressure and reinforcing cold air will be moving into the region today.
The overall pattern shows a persistent mid-level ridge located over the western US, with a deep trough over the Great Lakes region. A cloudless sky tonight will aid low temperatures dropping near freezing. Highs wil be above normal Wednesday reaching into the upper 50s near central Kansas, towards the low 50s in far northeast Kansas.
A deep mid-upper level trough extending from the northern Great Lakes all the way down to the Gulf of Mexico is dominating the eastern half of the CONUS while an impressive ridge continues to sit over much of the west. Highs this afternoon are expected to be cooler than yesterday across the CWA, though still an above average day for the month of December.
weak system moving through the upper level ridge tonight into Wednesday morning. Otherwise not much change to the low level inversion and expect low clouds and patchy freezing fog to continue overnight into Wed. Strong upper level ridge rebuilds Thursday.
Low pressure will track across southwestern Pennsylvania Wednesday night. This low will bring a period of light snow to the area Wednesday night. Temperatures falling into the teens, combined with gusty winds, will result in wind chills in the lower single digits late tonight across the southeast counties and the lower single digits below zero across the Allegheny Plateau. Passage of upper trough axis and pressure fall/rise couplet late tonight will likely be accompanied by an increase in wind gusts during the early morning hours. The snow should continue though at lesser rates in the northwest and in the higher terrain of the southwest mountains.
/issued 246 PM CST Tue Dec 12 2017/ (Tonight and Wednesday) Temperatures at mid-afternoon are 8-15 degrees cooler than yesterday at this time, across most of our area.
The 5 pm subjective surface analysis showed a polar cold front across central FL, and an arctic front from NJ through central AL. Vapor imagery and upper air data showed a deep long wave trough axis from the eastern Great Lakes to just off the FL east coast. With the trough axis now to our east, the core of the arctic air will remain well to our north. Lows will be in the lower 30s, except mid to upper 30s in the aforementioned, normally warmer locations. In the upper levels a longwave trough remains over the Central and Eastern U. On Thursday a weak cold front associated with a low near Maryland will approach the region and stall along the coast.
Later Wednesday evening, another dry cold front will move through the area, causing winds to turn to the north. The low wind speeds, clear skies and relatively dry air will allow for temperatures to drop from the 30s to around 40 degrees across the region.
A weak ridge of high pressure will bring a lull in the winds and snowfall for several hours this afternoon, followed by a fast-moving clipper system tonight that will bring periods of light to moderate snow to perhaps the entire region. Another ridge of high pressure will slide across the region Thursday and Thursday night with cold but mainly dry conditions.
810 AM PST Sat Feb 17 2018 Fair, warm and dry weather will continue today, but returning onshore flow will mean noticeably cooler weather on Sunday, with a return of coastal low clouds and possible fog overnight.
Low pressure will move across the southeastern United States quickly this afternoon and evening, moving offshore to the Atlantic. Precipitation will extend well to the northwest of this low into the region. Although many locations have warmed above freezing today, wetbulbing is quickly bringing temperatures back down. A quick burst of snow could bring several inches of snow, especially in the ridges. The low will already be moving offshore by the evening hours, so intensity of snow should drop by that time. Once the low moves offshore by sunrise, a mostly sunny day is expected on Sunday.
224 PM CST Sat Feb 17 2018 Warmer today with a bit more sunshine despite a cold front pushing into the Permian Basin region, shifting winds to the northeast.
325 PM EST Sat Feb 17 2018 Low pressure system exits tonight. High pressure Sunday.
Lows should be at or jut above the freezing mark for most locations. Isentropic lift in advance of the warm front and a return of deeper moisture for the Gulf Coast states should be sufficient for another round of showers to encroach on the area after midnight on Sunday night.
247 PM EST Sat Feb 17 2018 An upper-level composite analysis this afternoon reveals an expansive deep layer mean anticyclone centered over the subtropical western North Atlantic, with ridging extending northward and westward for several hundred miles. During the next 24 hours, a weak high pressure cell extending from the western North Atlantic to Gulf of Mexico will coalesce with an intensifying high pressure area beneath an amplifying long-wave ridge over eastern North America.
100 PM EST Sat Feb 17 2018 Aviation A large area of high pressure centered over the Central Appalachians will track rapidly east today. This will allow a weak area of low pressure to track through the region this evening. Another area of high pressure tracks up the Ohio Valley later tonight into Sunday.
213 PM EST Sat Feb 17 2018 Low pressure will track northeastward to the Mid Atlantic coast by this evening.
1128 AM EST Sat Feb 17 2018 High pressure over the region will result in a pleasant winter day. Quick moving low pressure will move south and east of New England Tonight and early Sunday, bringing the potential for snow.
256 PM EST Sat Feb 17 2018 An area of low pressure will move northeast across eastern NC this evening, followed by high pressure passing through Sunday.
This reprieve should be short-lived as the weak cold frontal boundary remains stalled just inland over SE TX. Frontal boundary remains nearly stationary across the area, roughly around the Highway 59 corridor with dew points at or below 60 to the north and in the mid to upper 60s to the south. Much of the area should be cooler tonight, but temperatures will again be tricky as some models indicate the frontal boundary possibly edging off the coast in/around the Galveston Bay area.
312 PM EST Sat Feb 17 2018 Low pressure system exits tonight. High pressure Sunday.
Frontogenetical forcing in the lower levels will overlap lift in the upper levels. A saturated dendritic growth zone, coupled with the strong lift suggest a fairly potent band of snow will setup somewhere between Interstate 94 and the International Border, with the Highway 2 cooridor being most likely at this time to see the higher snowfall amounts. The latest model runs indicate less of a threat for freezing drizzle across the south and therefore elected to remove it from the forecast.
Surface winds variable 10 kts or less in the valleys, and west 10-20 kts across the higher terrain. Strong westerly flow will tap into Pacific moisture as a low pressure system moves into the Pacific Northwest. Snow will develop this morning across the north, including the higher terrain of Baker County and in the mountains of West Central Idaho. Winds will also increase ahead of a cold front late this afternoon and evening - strongest on the ridges. The cold front will move southward across the area tonight. Snow showers are expected across southeast Oregon and southwest Idaho on Sunday as an upper trough strengthens over the Pacific Northwest and northern Rockies. Temperatures will be several degrees warmer ahead of the front today, then 5-15 degrees colder on Sunday.
349 PM EST Sat Feb 17 2018 (Tonight-Sunday night): Surface and mid-level high pressure ridge remains over South Florida, providing relatively light winds. Lows may only be a degree or two warmer than they were this morning.
All of this spells a wet and dreary Saturday afternoon in Middle TN and while we may see a brief respite from the rain during the day on Sunday (and warmer temperatures because of the lack of rain), more rain will return as soon as tomorrow evening. While wind speeds won't be overly high (10kts or less, though an occasional gust to 20 kts is possible), winds will shift all the way around the compass as this low pressure system pushes through the mid-state.
120 PM PST Sat Feb 17 2018 Increasing onshore flow will bring marine clouds and possible fog to coastal areas overnight, then noticeably cooler weather on Sunday.
355 PM EST Sat Feb 17 2018 Low pressure system exits tonight. High pressure Sunday.
116 PM EST Sat Feb 17 2018 Upper air pattern consists of a 500 mb broad trough over the central U. with a ridge off the west coast. Generally have 2-5 inches of wet 10:1 ratio snow Mon and Mon evening, with lesser amounts under 2 inches near Lake Michigan where some light freezing rain is possible.
/issued 916 AM EST Sat Feb 17 2018/ High pressure over the Western Atlantic Waters will allow for an light easterly wind flow over South Florida today allowing for both the east and west coast sea breezes to develop and push inland.
Weak frontal system and upper trough will continue to move eastward late this morning afternoon.
Overnight tonight, we should see lee trough developing to the west, which will shift winds around to the southeast, with low level moisture surging north. We kept high temperatures tomorrow a few degrees cooler than today across the south due to increased cloud cover, but we should climb into the 70s.
/issued 1021 AM EST Sat Feb 17 2018/ High pressure at the surface and aloft is keeping warm and moist conditions in place across the area. Light S/SE winds becoming SW/W in the afternoons as high pressure ridges across the waters for the next several days.
1134 AM EST Sat Feb 17 2018 High pressure over the region will result in a pleasant winter day. Quick moving low pressure will move south and east of New England Tonight and early Sunday, bringing the potential for snow.
In wake of a nearly 65 mile wide band of rain and embedded showers a brief return to MVFR to possibly VFR expected, however a return to IFR forecast during the overnight period as upper level disturbance and trough will shift the area of rain South. Sharply cooler temperatures are noted north of the boundary with mid 40s to mid 50s over much of the region. Rainfall amounts will be very light this afternoon despite the high POPs, mainly a tenth of an inch or less in most locations. Daytime highs also required slight adjustments to better align with trends thus far as areas in the rain shield will likely not see much movement in readings through the afternoon while points north of I-30 should see a slow rise into the lower to mid 50s behind the departing rainfall.
1258 PM PST Sat Feb 17 2018 A strong cold front will move through the region Sunday into Sunday night bringing periods of snow to the Sierra and snow showers to western Nevada. A strong cold front and gusty winds are on track to cross CA/NV from north to south tonight into Sunday night.
Will now look for snow and freezing drizzle to near the ND/SD border overnight and into Sunday morning. A weak low pressure system and broad upper level trough will cross the region this morning. A stronger low pressure system will cross South Dakota later tonight through Sunday. Models soundings still support the possibility of freezing drizzle with minor ice accumulations possible. The latest models continue to advertise the development of a positive tilt mid level trof over the western conus, extending northeast into the Western High Plains.
221 PM EST Sat Feb 17 2018 Low pressure will track northeastward to the Mid Atlantic coast by this evening.
233 PM EST Sat Feb 17 2018 An area of low pressure will move just southeast of the region today while an upper level disturbance moves toward the Great Lakes. High pressure will allow for dry conditions on Sunday. High pressure will then work into the region for the day on Sunday. WAA on Sunday and plenty of sunshine will allow temperatures to climb into the middle 40s to the lower 50s.
Sharply cooler temperatures are noted north of the boundary with mid 40s to mid 50s over much of the region. Rainfall amounts will be very light this afternoon despite the high POPs, mainly a tenth of an inch or less in most locations. Daytime highs also required slight adjustments to better align with trends thus far as areas in the rain shield will likely not see much movement in readings through the afternoon while points north of I-30 should see a slow rise into the lower to mid 50s behind the departing rainfall. The lowest VIS were noted at ktyr and klfk as winds there were light and variable or calm.
We cancelled the High Wind Warning including Cheyenne, but made no changes to other headlines as gradients are expected to increase markedly this eve/ overnight over western and northern areas. South of the front, temperatures are in the low to mid 20s.
During the afternoon, 850 mb winds shift around to SW again, and the resulting warm advection with mostly sunny skies will bring temps into the lower to mid 60s in the Valley.
Surface analysis this afternoon places a cold front over portions of Central/Southern Mississippi and Northern Alabama. As of 2 PM CST, temperatures across the Mid-South are in the 40s at most locations with the exception of Monroe County, Mississippi where temperaturesare still in the lower to middle 50s. Short term models indicate the downstream cold front will begin to return back north as a warm front on Sunday with rain chances increasing especially Sunday afternoon into Sunday night.
319 PM CST Sat Feb 17 2018 The tighter pressure gradient overhead this afternoon will weaken late this afternoon/this evening as the ridge of high pressure that has been over western SD glides across eastern SD and western MN by 00Z Sunday. The lighter winds will be short lived as low pressure nears from the west and we start of experience increased southeast winds after 06Z bring gusts nearing 15-20kts that will quickly slide to eastern SD (mainly Coteau area) by 12Z Sunday. While the potential still exists for light snow (less than 1in) and freezing drizzle (around a trace), the threat has shifted mainly north of the ND/SD border. Given the late arrival of the low/cold front, temperatures could still rise into the 40s over east central SD Sunday afternoon.
1127 AM EST Sat Feb 17 2018 An area of low pressure will move just southeast of the region today while an upper level disturbance moves toward the Great Lakes. High pressure will allow for dry conditions on Sunday. High pressure will then work into the region for the day on Sunday. WAA on Sunday and plenty of sunshine will allow temperatures to climb into the middle 40s to the lower 50s.
1213 PM CST Sat Feb 17 2018 A cold front passing through the area will bring breezy northeast winds through the afternoon. This feature will not move much through the day so Sunday may feel like a more traditional spring day across the area with the moisture in place and temps in the low 70s.
152 PM EST Sat Feb 17 2018 Low pressure, located over the southern Mississippi Valley early this morning, will track northeast to the Mid Atlantic coast by this evening.
Surface analysis late this morning places a cold front over Central Alabama and Central/Northeast Mississippi. The warm front to the south may creep into Monroe county but that is as far north as it will get. Weak high pressure will move into the region tonight with light winds and some clearing. High pressure will shift east and a warm front will start lifting north with scattered showers.
This reprieve should be short-lived as the weak cold frontal boundary remains stalled just inland over SE TX.
411 PM EST Sat Feb 17 2018 WV imagery and RAP analysis indicated cyclonic wrly flow through the n cntrl CONUS around a deep mid/upper level low west of Hudson Bay. So, an advisory was issued only for the Keweenaw where the highest amounts are likely. Generally have 2-5 inches of wet 10:1 ratio snow Mon and Mon evening, with lesser amounts under 2 inches near Lake Michigan where some light freezing rain is possible.
A Very Active and Unsettled Weather Pattern Heading Our Way Clouds are slowly clearing from west to east this afternoon with the clearing line just moved through the Highway 65 corridor as of 3 pm. A large upper level trough will develop and dig across the western U.
Otherwise, we'll be starting off with less than 1 inch of precipitable water, then only slight moistening is indicated as the gradient wind becomes onshore due to high pressure building to the north behind the exiting frontal trough. High temps on the coast should reach the lower 80s again, except for upper 70s in coastal Volusia, while the interior continues to have highs in the lower to mid 80s.
Lows will be in the lower to middle 60s. Another warm day is in store with highs in the lower to mid 80s across the western half of the area to mid 70s over the Victoria Crossroads.
1036 AM MST Fri Dec 1 2017 Infrared satellite imagery reveals increasing cloud cover over the northern third of the CWA early this morning as a very weak trough zips through the northern Rockies. The primary forecast challenge in the short term was whether or not to add any mention of a snow shower in the highest peaks of the Parks and Elkheads.
1254 PM EST Fri Dec 1 2017 A weak cold front moving into the area this morning will stall just south of the area tonight.
1018 AM CST Fri Dec 1 2017 High pressure remains over the Ohio River valley today and this is keeping the region dry with light winds through the afternoon. High pressure will dominate the weather across central Illinois today, providing mostly sunny and mild conditions. High temperatures will be a couple degrees cooler than yesterday. with afternoon readings topping out in the lower to middle 50s. As the high exits the region, southerly return flow on its back side will keep lows in the lower to middle 30s tonight.
218 PM CST Fri Dec 1 2017 Mid level SW flow continue to advect mid to high clouds northeast into our region ahead of a mid level low pressure system off the Baja California coastline.
High pressure over the area will slide east allowing a light ssw flow to develop this afternoon going nearly calm tonight before increasing slightly higher Saturday. * None After a quiet start to the forecast with high pressure holding through the weekend, the weather pattern will feature a notable change with a deep trough dropping into the region for the foreseeable future. Weather through the weekend will be fairly quiet as an area of high pressure at the surface slides through the Ohio Valley and over New England. Flow will be light southerly today but will become more southwesterly on Saturday as the high shifts east.
Additionally, FG is expected to develop tonight with the highest confidence of occurrence at KCSV where LIFR conditions will be possible 04Z-16Z.
332 PM CST Fri Dec 1 2017 At 2 PM, high pressure over the eastern U. continues to retreat east and an area of low pressure was nearly stationary over the Texas panhandle. High cloudiness will increase Saturday night and a weak warm front will slowly approach the coast.
328 PM EST Fri Dec 1 2017 High pressure will build overhead today and remain in control of our weather through the weekend.
Surface ridging just to our north will maintain a light onshore breeze through sunset before winds begin to decouple and weaken, especially across the northern third of the area.
Portions of the region that receive measurable rainfall this afternoon will likely see the lowest visibilities due to higher soil moisture content.