Aikyam-Lab/Synoptic-Bench huggingface dataset:
248 PM CDT Tue Oct 24 2017 Afternoon satellite and surface observations show a stacked low pressure system drifting eastward across the Northern Great Lakes. Model soundings indicate below freezing thermal profiles with deep lift and saturation through the DGZ and surface temperatures around 32F. Therefore, snow is the expected precipitation type until diurnal heating warms surface temperatures above freezing. After a bit of short wave ridging Wednesday, this will quickly break down as the next short wave trough drops southeast out of the Canadian Rockies Wednesday night.
118 PM EDT Tue Oct 24 2017 A strong cold front, will cross the area this morning.
1128 AM MDT Tue Oct 24 2017 Imagery shows an amplified ridge across the wrn CONUS and a large trof across the ern half of the CONUS. The next upper lvl SW trof that will eventually affect WY currently lays at about 160W lon ovr the PAC. The SFC is post frontal across WY with the CONUS basically following the upper levels with high pressure entrenched across the west and low pressure over the east and a long cold front dividing the two areas. Today through Wednesday: Warming and drying trend in place as heights rise with the ridge.
347 PM EDT Tue Oct 24 2017 Mid/upper level trough from Great Lakes southward to the east central Gulf of Mexico will amplify this period and move east. The secondary cold front located over central GA this afternoon will push southeastward bringing much stronger CAA pattern with temps tonight pushing into the mid 40s to lower 50s. will continue to see a very dry airmass with PWATS under half an inch and northwest flow with high pressure system across the west Gulf coast area. So with this in mind, we favored the warmer side of guidance for Wednesday night and raised temperatures a couple of degrees.
255 PM CDT Tue Oct 24 2017 Cooler temperatures today due to northwest flow aloft and weak northerly winds at the surface keeping most of us in the 60s across our CWA.
/issued by National Weather Service NASHVILLE TN/ Latest visible satellite imagery show clear skies across most of the Mid South but clouds are beginning to move into northern zones as a potent upper trough swings into the region per water vapor imagery. HRRR model runs continue to depict widely scattered showers breaking out this afternoon across far northeast Arkansas and the Bootheel into western Tennessee as trough axis moves across, and will leave a low pop in across the northeast half of the forecast area. /issued 259 AM CDT Tue Oct 24 2017/ A potent upper trof will move into the Mid-South today.
120 PM EDT Tue Oct 24 2017 Low pressure will maintain shower chances and cool temperatures through mid week.
An upper trough over the region will continue to rotate bands of low to mid level clouds through the area this TAF period.
These west downslope winds should keep low temperatures above freezing tonight despite the dry air mass.
306 PM MDT Tue Oct 24 2017 A deep trough continues to dig into the east coast, while strong ridging builds over the west.
A low pressure system and associated cold front will continue to approach from the northwest overnight.
337 PM CDT Tue Oct 24 2017 A large low height anomaly/upper low sits near the western Great Lakes this afternoon. Winds will be breezy as the trough goes by but will eventually lighten up. A few sheltered, normally cooler locations may receive some frost.
Issued by National Weather Service NASHVILLE TN 328 PM CDT Tue Oct 24 2017 Cool, cloudy and windy afternoon across much of the Mid South today as an upper trough axis swings by overhead, with temperatures only in the 50s and 60s, dewpoints way down into the 20s and 30s, and west to northwest winds gusting over 30 mph at times. With skies becoming mostly clear, dewpoints below freezing, and winds subsiding, appears patchy frost is a good bet across parts of West Tennessee and northern Mississippi late tonight.
Deep low pressure (986 mb) was located north of Presque Isle MI. Meanwhile cold canadian high pressure (1042 mb) was centered over the Northern Rockies. Cold advection will assist in steepening the low level lapse rates and bolstering mixing, which along with lingering tight pressure gradient will lead to brisk/windy day.
1115 AM PDT Tue Oct 24 2017 Expect mild, dry conditions through the week, as high pressure builds into the Pacific Northwest. The ridge will be briefly interrupted by a fast moving weather system Wednesday.
416 PM EDT Tue Oct 24 2017 Deep troughing continues to barrel eastward across the Ohio Valley this afternoon. Latest WPC analysis shows a distinct cold front extending south southeast from the main low pressure center towards central Florida and out over the Gulf of Mexico. As the influence of the cooler/drier air behind the front draws near, minimum temperatures should drop to the mid 60s in the western peninsula to around 70 in the east.
416 PM EDT Tue Oct 24 2017 As deep low pressure over the Great Lakes drifts northeast into southern Canada tonight, the attending cold front will continue to sweep through the North Country this evening with rain ending from west to east.
Significant winds and dry conditions ahead of a cold front passage Wednesday afternoon have resulted in the issuance of a Red Flag Warning for portions of Central Montana. An upper level ridge of high pressure will be over the region today through Wednesday afternoon resulting in mostly dry but windy conditions. A fast moving cold front moves southward through the region Wednesday night, producing a few rain or snow showers over the Rocky Mountain Front and across Central and Southwest MT. On Wednesday, the focus will shift to all terminals as a cold front drops south out of Canada. However, stronger winds and lower humidity is expected on Wednesday ahead of a cold front.
A few patches of light rain or sprinkles will be possible tonight as weak lift and minimal low level moisture rotate in around as an upper trough over the region. A few higher elevations of the east TN mountains should see temperatures fall to around the freezing mark and a Freezing Warning will be in effect for these areas. Where temperatures fall into the low 30s.
130 PM EDT Tue Oct 24 2017 Periods of rain and breezy conditions can be expected today on the southern fringe of deep low pressure over the Great Lakes.
344 PM CDT Tue Oct 24 2017 A reinforcing dry cold front pushed through the area this morning ushering in even drier air amidst breezy northerly winds. The rather pleasant cool, dry weather will continue Wednesday with high pressure in place across the western gulf.
SHORT TERM (Tonight through Wednesday Night): The short term period will remain pretty quiet and benign over the RGV as dry and mild surface ridging dominates the region. The low level flow pattern will then begin to shift around to a light southerly late Wed which will allow for the overnight lows to warm up a bit in addition to some rebounding dewpoints as the low level moisture return kicks in.
252 PM CDT Tue Oct 24 2017 A pronounced long wave trough over the Great Lakes is driving the weather conditions over our area with cooler air and a tight pressure gradient creating gusts in the mid to upper 30s. This trough will slowly progress to the east allowing ridging and some warmer air to advect over our region Wed and Thur allowing our temperatures to recover back into the upper 60s and lower 70s.
(This evening) ISSUED AT 1254 PM CDT Tue Oct 24 2017 An extensive though generally light to occasionally moderate rain shield will continue to spread southeast through the afternoon under a very deep upper level trough. The core of the low center will continue to shift northeast and merge with the main low along the eastern fringes of Lake Superior. Wind gusts will generally peak around 25 kt given the low cloud shield, though occasionally higher gusts are possible this afternoon when cloud bases lift. Expect clearing skies late this evening into the early overnight hours to allow current low 40s to drop into the middle 30s, possibly some near freezing readings, but with a modest pressure gradient behind the weakening though still modest low, it is not an ideal frost scenario. with highs in the lower to middle 50s.
The main area of rain moved out of southeast WI, but there are areas of light rain and drizzle traversing southward through southeast WI due to small impulses in that upper low sitting over the eastern U.
High pressure will bring clear skies, but strong/gusty northwest winds to the region today. As the high moves south tonight, the pressure gradient will slacken and with loss of daytime heating/mixing, winds will diminish fairly quickly after sunset. /issued 309 AM CDT Tue Oct 24 2017/ Breezy northerly winds will affect the area again today as upper trough deepens and moves across the eastern U. Cooler temperatures also expected today, with highs in the 60s across the area which would be about 10-15 degrees cooler than yesterday.
Very warm/hot and dry conditions prevail over the region as high pressure remains over the West Coast. Strong high pressure over the region this afternoon along with offshore flow has resulted in very warm to hot temperatures. Temperatures are forecast to cool slightly on Wednesday, especially near the coast yet will remain a good 10 to 15 deg F above seasonal averages as the ridge aloft weakens. With this, look for widespread 80s again Wednesday afternoon with many locations in the North Bay and Salinas Valley again reaching into the lower 90s. A few additional degrees of cooling is expected late in the week as the ridge weakens and light onshore flow returns to the coast. However, the broad mid/upper level ridge will remain stretched along much of the West Coast through late week and potentially into the weekend.
High pressure ridge just to our west is providing another great late autumn day with sunny skies, light winds and seasonal temperatures. Southwest to west winds will increase over the region as pressure gradients increase ahead of an approaching cold front.
317 PM CDT Tue Oct 24 2017 Will likely see the coolest temps of the season thus far across the area as blustery nw winds ushering in cooler air with gusts as high as 40 mph. Wx pattern becmg slightly more progressive and have raised overnight lows Wednesday night at least a couple degrees as the high pressure begins to move eastward.
311 PM CDT Tue Oct 24 2017 An upper level trough was moving into Mid TN from the northwest this afternoon with scattered showers. Wednesday will be a chilly day (almost 10 degrees below normal) with a very sharp upper level trough axis extending from the Great Lakes to the Gulf Coast.
The main concern will be elevated winds across AR as a cold front moves through the region. / Issued 321 AM CDT Tue Oct 24 2017/ Main concerns in this forecast cycle are elevated winds over AR behind a cold front which will lead to a lake wind advisory. Then later in the week, the next cold front with possible rain chances, then the coldest air of the Fall season over AR. Aloft, the deep upper low pressure trough was from the central to eastern U. Continued mostly sunny on Wednesday with highs remaining cooler than normal, with 50s north and 60s elsewhere.
257 PM CDT Tue Oct 24 2017 Deepening upper low was centered over the Great Lakes this afternoon with downstream strong cold air advection keeping northeast Kansas on the cool and gusty side. Northwest winds generally from 15 to 25 mph with gusts in excess of 40 mph at times are expected to weaken around 10 mph as an upstream area of high pressure shifts southeast across central Kansas this evening. 850 mb ridge builds over the region tomorrow afternoon as winds back to the west and southwest around 10 mph. Temperatures associated with the ridge increase from 12-14C over north central Kansas. Further east, weaker winds and subsequent mixing result in highs in the lower 70s.
But the lower end of this range, along with clear skies and light winds will be favorable for the formation of frost in our colder areas. Dry weather should continue for the Wed-Thu timeframe, as cool high pressure builds from northern Rockies to the NW Gulf region, producing a more westerly wind. Light winds and clear skies would support patchy late night frosting (again within those normally cooler spots).
Issued by National Weather Service AUSTIN/SAN ANTONIO TX 258 PM CDT Tue Oct 24 2017 Continued northerly flow over the region due to the passage of another cold front this morning will continue this evening and into the overnight hours. Wednesday will be quite nice across the CWA with high pressure over the area.
101 PM EDT Tue Oct 24 2017 A chance for showers will continue today and into Wednesday, as a trough of low pressure remains centered over the Great Lakes. High pressure will move into the area late in the week, with a slight increase in temperatures.
An upper level ridge centered over the western U. will bring dry weather conditions and warmer temperatures through Wednesday. The ridge axis will reach northeast Montana on Wednesday, bringing high temperatures in the 60s north of the Missouri River with 70s south. While most models support winds very near high wind criteria, the models carry this further north, so expanded the High Wind Watch into the remainder of Phillips County.
1217 PM CDT Tue Oct 24 2017 High pressure building across the region will allow for strong northwest winds around 20 knots with higher gusts through 25/00Z before becoming 5 to 10 knots overnight.
1124 AM MDT Tue Oct 24 2017 Mostly sunny skies and dry conditions are expected to rule the area today as high pressure builds to our west, with a northerly flow aloft. The flow aloft will shift to westerly on Wednesday with a little breezier conditions up north, as the cold front and upper level trough approaches. The surface cold front will be moving through Wyoming. As the upper low of this system moves through the High Plains, its cold front will plunge down the Front Range but also affect western Colorado near the Continental Divide. The vast majority of its precipitation will remain in the higher mountains east of a line from Hayden to Eagle to Gunnison.
546 PM EDT Tue Oct 24 2017 Low pressure will maintain shower chances and cool temperatures through mid week. Those showers will fade quickly this evening as temperature falls below low convective thresholds under upper troughing. As the upper low moves east of the region Wednesday night, the chance for showers will drop off. Have continued with the chance for snow in the highest elevations, although temperatures right around the freezing mark should not allow for any snow to stick.
409 PM EDT Tue Oct 24 2017 A strong upper level trough will cross the area Wednesday providing cool temperatures and some mountain showers.
319 PM CDT Tue Oct 24 2017 Upper level low situated to our north has resulted in increasing cloud cover, isolated to scattered showers, and gusty westerly winds this afternoon. However, closer to the influence of the upper low, we may see some lingering showers over our northeast counties for a bit this evening.
That changes Wednesday as a cold front currently over British Columbia moves southeast.
357 PM CDT Tue Oct 24 2017 Gusty conditions from this afternoon will gradually diminish later this afternoon and evening as a deep area of low pressure currently situated over far eastern Upper Michigan will weaken a bit and advance northeastward tonight. Aloft, a very brief high pressure ridge will build this evening before a rapidly moving clipper system is progged to dive southeastward from Saskatchewan/Manitoba, Canada, which will bring a band of 1000-850 mb layer FGEN with it, mainly between 03z tonight to 15z Wednesday. Once the FGEN band moves out by Wednesday morning, the rest of the day should be dry as mid-level ridging builds into the region. Temperatures will be near seasonal averages, with highs in the middle 40s over the Arrowhead region to the lower 50s over the Brainerd Lakes.
348 PM CDT Tue Oct 24 2017 A deep upper level trough over the upper Midwest will be reinforced this weekend with another very deep upper level trough being carved out.
353 PM CDT Tue Oct 24 2017 A nice fall day across the forecast area as we are on the back side of a longwave trough across the region. This has allowed for northerly winds to continue to pump in cooler drier air into the region. Temps overnight should dip into the lower 40s and even perhaps the upper 30s across the northern portions of the forecast area.
348 PM EDT Tue Oct 24 2017 A chance for showers will continue today and into Wednesday, as a trough of low pressure remains centered over the Great Lakes. High pressure will move into the area late in the week, with a slight increase in temperatures.
205 PM MST Tue Oct 24 2017 High pressure will slowly weaken through the remainder of the week resulting in a gradual cooling trend, though temperatures will continue to remain above normal. Afternoon highs in the lower and middle 90s will be common for lower elevation communities into the weekend. Highly anomalous ridging continues to predominate the southwest Conus this afternoon with earlier 12Z regional soundings once again sampling H5 heights at or just above 594dm (record high for the date). Otherwise, a steep pressure gradient between Great Basin high pressure and thermal low pressure will be maintained overnight. This will yield another night of gusty ridge top winds and calm valleys resulting in an enhanced low temperature disparity based solely on exposure.
High pressure aloft to the west of Utah will maintain a dry and mild northwest flow across the area through Wednesday night.
542 PM CST Fri Feb 16 2018 Updated for 00Z aviation discussion 00Z TAF discussion: A cold front continues to push south through the region. /28/ Tonight through Saturday: A shallow cold front is pushing south of I-20 this afternoon and will weaken and stall tonight as it approaches the coast. Gusty northerly winds and significantly cooler temperatures will continue to follow the front into the early evening. The increasing warm advection combined with daytime heating will mix out the weak front and refocus cooler temperatures over northern portions of the ArkLaMiss during the day while allowing for another warm afternoon farther south, especially along the Highway 84 corridor.
Cold front has cleared the forecast area and northerly surface flow in its wake has allowed for temps to drop into the 50s across most of the region, with the exceptions being some portions of the Delta in the 40s and Pine Belt in the 60s. /TH/ Prior discussion below: Tonight through Saturday: A shallow cold front is pushing south of I-20 this afternoon and will weaken and stall tonight as it approaches the coast. Gusty northerly winds and significantly cooler temperatures will continue to follow the front into the early evening. The increasing warm advection combined with daytime heating will mix out the weak front and refocus cooler temperatures over northern portions of the ArkLaMiss during the day while allowing for another warm afternoon farther south, especially along the Highway 84 corridor.
In the low to mid levels of the atmosphere, an Atlantic ridge of high pressure will extend across Central Florida overnight. In the upper levels of the atmosphere, an area of high pressure will be centered just northeast of the Bahamas tonight.
624 PM EST Fri Feb 16 2018 A cold front will settle south of the region tonight allowing high pressure to build into the region through Saturday.
/issued 528 PM CST Fri Feb 16 2018/ A mix of IFR/MVFR expected overnight as ceilings will fluctuate with cold front moving across the region. /issued 350 PM CST Fri Feb 16 2018/ A cold front movg south across the area has resulted in falling daytime temps. However, elevated trough bringing increased chances of rain from the north, currently still just north of the cwa.
708 PM EST Fri Feb 16 2018 High pressure will gradually clear our skies as it brings colder and drier air into the region tonight. High pressure builds in overnight bringing clearing, with light winds ending the lake fetch. Fast moving southwest flow and baroclinic make it difficult to place the low and snow amounts. Still plenty of time before an Advisory is needed, especially given the low confidence.
High pressure will bring one last day of dry and mild weather across northwest California. Skies are mainly clear this afternoon ahead of the approaching cold front. A fairly dry cold front will bring some rain to the area on Saturday.
344 PM PST Fri Feb 16 2018 Warmer than normal conditions continue through Saturday as high pressure builds overhead. Temperatures will trend higher today and Saturday as high pressure builds inland.
An upper level trough, located across eastern WA and ID will dig southeast across the central plains late Tonight and Saturday. Residual moisture will return ahead of the a surface cold front across portions of east central KS. There will be enough ascent ahead of the upper trough and isentropic lift for light snow or possibly freezing drizzle, if the ascent is not strong enough to moisten the mid levels. The chances for any light snow or freezing drizzle will be along and south of I-35 and should turn over to light rain as warm advection cause temperatures to warm into the mid 30s by 8 AM.
549 PM CST Fri Feb 16 2018 Minimal weather concerns are expected through Saturday as high pressure remains over the region. Therefore, overnight low temperatures will still drop into the low to mid 20s across the forecast area.
/issued 259 PM CST Fri Feb 16 2018/ (Tonight and Saturday) A cold front that pushed across West Central Texas this morning has left much cooler temperatures compared to yesterday and breezy northeasterly winds in its wake. High res model guidance continues to indicate the highest rain chances across the Big Country with lesser chances further south. Otherwise, rain chances will taper off by tomorrow afternoon as the upper level trough moves off to the east.
423 PM MST Fri Feb 16 2018 Upper level analysis has zonal flow across the northern Plains with trof developing across the Pacific Northwest. At the surface, high pressure resides across the Midwest with west to southwest boundary layer flow across the forecast area. A wider range of temperatures is expected on Saturday, with highs ranging from the lower 20s across far northwest SD to the mid 30s across southern parts of northeast WY to southern SD.
/Issued 239 PM CST Fri Feb 16 2018/ Cold front has pushed south of the ARKLATX region this afternoon with cool and cloudy conditions across much of the area. Surface winds will begin to veer around to the southeast tonight and with increasing dewpoints tonight no significant threat for freezing rain is expected.
540 PM CST Fri Feb 16 2018 After a chilly start today, southwesterly surface winds have brought warmer air into the region. Overnight into Saturday morning, this trough will cause enough lift to produce some light snow showers over northwest Iowa. During the daylight hours, a subtle secondary trough could bring another dusting to the tri- state area, but again, this looks to be of minimum impact.
Ergo, there is some potential for the fog to spread farther inland and become dense at times before the low level jet improves things (improvement may only be slight).
A cold front brought cooler temperatures and at least a brief shot of rain to most of Middle Tennessee this morning. Temperatures are currently in the low to upper 40s across the area. We'll see a break in precip this evening, however the next shot of rain will come quickly Saturday morning as a weak trough swings across the eastern half of the country.
707 PM CST Fri Feb 16 2018 Warm front has pushed through western and central North Dakota with afternoon highs reaching the 20s and 30s for all but the far northeast CWA where upper teens held on around the Turtle Mountains. For tonight, a weak cold front will drop south through the forecast area.
Dry and warmer conditions will then return Saturday, before another system passes through the region.