Aikyam-Lab/Synoptic-Bench huggingface dataset:
322 PM CST Tue Dec 13 2016 18Z surface data has cold high pressure along the Nebraska/Iowa border with a weak boundary across the Dakotas. The combination of the clouds and the high moving into the Ohio Valley will allow temperatures to first stabilize and then slowly rise the remainder of the night.
Temps this morning were running a few degrees warmer than expected. Feature will be followed by sharply drier air and will result in a dry forecast for mid-week along with cooler temperatures.
346 PM CST Tue Dec 13 2016 (Tonight and Wednesday) Overnight lows will be near ten degrees colder than last night after a cold frontal passage earlier today. Morning low temperatures for the northern half of the forecast area will be in the low to mid 30s, with upper 30s in the southern half of the area. Another weak cold front will move into the area tomorrow afternoon, reaching the I-10 corridor by late afternoon. High temperatures will reflect the position of the cold front with highs in the low to mid 50s over the Big Country and northern Heartland and mid 60s over the southern portions of the forecast area.
The coldest air of the season will move in tonight and then get even colder Wednesday as another Arctic cold front pushes through the region. Lake effect snow over northern portions of the area is possible with the cold front passage.
High pressure will build in from the west and drier air will work its way into the area for Wednesday, resulting in a dry day with decreasing clouds. Temperatures will be a bit cooler tomorrow as colder air begins to make its way into our region, but will still reach the mid to upper 40s in most locations.
Conditions clear out for the daytime hours Wednesday with high pressure building overhead and cooler and drier air working into the area.
In the middle and upper levels(700-200 mb), latest available IR imagery overlaid with model streamline analysis as of 200 pm depict the continuation of low amplitude polar troughing across the entire CONUS. South Florida and the Florida Keys are beneath the far northwestern periphery of an expansive deep and warm anticyclone centered near Puerto Rico. At the surface and in the Lower to Middle Levels, (Surface to 700 mb), Latest IR imagery overlaid with available marine and land surface observations and surface analysis detail the center of a near 1030 mb surface arctic high pressure system positioned over Nebraska. As of 200 pm, skies are mostly sunny across the islands and surrounding waters, with temperatures in the upper 70s to around 80 degrees and dewpoints in the lower to mid 70s.
/issued 534 AM CST Tue Dec 13 2016/ A modest cold front pushing southward through KLBB at this hour will be followed by mostly under 12 knot winds all areas today. /issued 342 AM CST Tue Dec 13 2016/ A weak cold front was sliding southward through the area early this morning behind the latest disturbance cruising through Missouri and heading towards the Ohio Valley later today. The next cold front is scheduled to move through the area on Wednesday during the daytime. The timing of the front will lead to little confidence in the high temperatures forecast on Wednesday.
Upper low currently rotating around northeastern Manitoba will dig further southeastward into Ontario tonight. Satellite loops show a fair amount of mid and high clouds upstream near the cold front. The center of the high will remain to our south and west throughout the day so we will continue to have a decent gradient and breezy northwest winds.
Sleet and snow have been reported at times when rates were sufficient for low-level wet-bulb cooling, but with surface temps still just above freezing the impacts have been minimal. Temps will continue to run below normal, but the biggest departures don't come until Wednesday night as the high settles overhead.
1013 AM MST Tue Dec 13 2016 Upper low spins over northern Manitoba, and a 150-kt jet streak is moving over the central plains. At the surface, high pressure sits over the northern plains. With cold high pressure over the region, today will be mainly dry. Low-level trough will begin approaching the region Wednesday night.
But this could produce more of an advection fog coming off the Gulf of Mexico with more radiational fog across southern counties closer to ridge axis. Mild low temps in the low to mid 60s. High temperatures will again be in the low to mid 80s, nearly 10 degrees above normal.
There is enough low level moisture for this flow to cause low cloudiness and even some patchy freezing fog along the Blue mountain foothills, the lower north and northwest facing slopes of the Blues, the higher terrain in North-Central Oregon and into portions of Central Oregon. May also see a few light snow showers along the foothills and the higher terrain of North- Central Oregon.
225 PM MST Tue Dec 13 2016 Upper level analysis has giant closed low over central Canada with broad trof across much of the CONUS. At the surface, arctic high pressure dominates with temperatures in the teens to around 20 degrees at 2pm. Low-level trof will begin approaching the region Wednesday night.
13/20Z surface observations show a cold front is currently located just north of the region near Temple. This cold front will continue to move southward overnight, bringing increasing northerly winds and cooler air to the region overnight. A secondary surge of high pressure moves in Wednesday night bringing another batch of cool and dry air to south central Texas.
1241 PM EST Tue Dec 13 2016 Rapidly moving low pressure will spread snow across the much of the region today and will usher in an arctic airmass for the late week. Another system will move in for the start of the weekend, bringing a wintry mix and some warmer air. Further south, temperatures should warm enough to allow for a mixture of rain/snow and light accumulations are expected over the southeast ridges after the the frontal passage for a short duration within upslope flow.
But cold front, south of a Palestine-Temple-San Angelo line at 20Z, will advance southward and reach the northern counties by 03Z Wednesday and be through the coastal waters by 09Z.
1154 AM EST Tue Dec 13 2016 Rapidly moving low pressure will spread snow across the much of the region today and will usher in an arctic airmass for the late week. Another system will move in for the start of the weekend, bringing a wintry mix and some warmer air. Further south, temperatures should warm enough to allow for a mixture of rain/snow and light accumulations are expected over the southeast ridges after the the frontal passage for a short duration within upslope flow.
VFR will return to all sites after 16Z on Wednesday as the low clouds and fog burn off.
145 PM CST Tue Dec 13 2016 Upper low over Canada with trough extending down across the Mississippi River Valley as upper ridging builds across the West.
224 PM EST Tue Dec 13 2016 Rapidly moving low pressure will spread snow across the much of the region into this evening and will usher in an arctic airmass for the late week. Another system will move in for the start of the weekend, bringing a wintry mix and some warmer air. Further south, temperatures should warm enough to allow for a mixture of rain/snow and light accumulations are expected over the southeast ridges after the the frontal passage for a short duration within upslope flow. Building high pressure in the wake of the front and lowering inversion heights should end precipitation over the ridges by late tonight. Brief high pressure will help maintain mostly dry weather for much of Wednesday.
/issued 343 AM CST Tue Dec 13 2016/ Current observations show a cold front in the Texas Panhandle which is moving south towards the Permian Basin early this morning. Another cold front will follow Wednesday night and with deeper cold air behind it will have more of an impact.
236 PM CST Tue Dec 13 2016 Cold front moving through the area resulted in some light rain, briefly mixed with a few snow flakes in northern counties early this afternoon.
A warm moist environment ahead of the front, combined with a 2 to 3 weak disturbances accompanying the WSW flow aloft ahead of the upper trof will bring increasing rain chances, particularly north of I-10 into SE Georgia. As the cold front pushes into SE Georgia late tonight, patchy fog will likely develop across NE FL ahead of this feature while scattered to numerous showers with embedded but isold thunder develops primarily across the Suwannee Valley and Southeast Georgia this evening. The aforementioned cold front will then slip south of the FL/GA border before the lunch-hour and shift slowly down near I-10 by late afternoon providing scattered to numerous showers and isolated embedded thunderstorms.
1113 AM CST Tue Dec 13 2016 Cold front had pushed well south of the area and extended from northwest Illinois into southeast Kansas at 08Z.
122 PM EST Tue Dec 13 2016 A nearly stationary front across Georgia and coastal South Carolina will move back north as a warm front today. Rain chances will increase through Wednesday as weak low pressure moves through the area along the front. A cooler and drier air mass will return late in the week. Afternoon highs will range from around 50 north to the lower 60s south. For tonight, a stronger cold front will approach from the west.
404 PM EST Tue Dec 13 2016 The stalled boundary will lift north with a wave of low pressure along the coast tonight. Weak cold front will cross the area Wednesday morning.
Reinforcing cold front arrives later tonight into early Wednesday. Will see the 850 temps and 1000/500 millibar thicknesses drop off further Wednesday setting us deeper into the throes of the amplifying low level thermal trough. Mid/upper flow becomes increasingly broadly cyclonic with just a hint of DCVA Wednesday morning as the elongated vort axis within the broad 500 millibar trough drops into srn WI.
Towards the end of the TAF period, a cold front will move south across the region and in its wake, winds will shift to due north with sustained winds between 10-15 kts right through the end of the TAF period. /Issued 426 AM CST Tue Dec 13 2016/ A cold front today will bring temps to more seasonable levels and another cold front tomorrow will drop temps even more. With moisture in short supply with upper level ridging in place, the frontal passages will remain dry. However, the upper level pattern will be changing for the end of the work week as a low pressure system makes it way across the Rockies and brings moisture with it.
Pre-frontal wind conditions will develop over the lower elevations with generally light nw flow across the lower elevations. Dry conditions are anticipated for the lower elevations.
Mid level warm air advection on Wednesday with an upper level ridge building in from the west. Across the northeast plains, a cold front will push into the Front Range from the east with weak shallow upslope in the morning.
338 PM CST Tue Dec 13 2016 Cold front continues to push through the region and will clear the area later tonight. Behind it, it will bring very dry and cold air as high pressure continues to build into the region.
242 PM CST Tue Dec 13 2016 Cold, warmer, thunderstorms, winter precip, 40-50 degree temperature drop, and a partridge in a pear tree.
Stay warm! TFJ Arctic high pressure will build into Central Montana today. Meanwhile, there will be enough of a surface pressure gradient over Northeast Montana with a low pressure system to the east that it will be breezy over the area. NW winds will diminish this evening as high pressure continues to build into Northeast Montana.
107 PM EST Tue Dec 13 2016 A cold front will move through the area late this afternoon and early this evening bringing snow showers and colder air.
218 PM CST Tue Dec 13 2016 The main impact in this forecast is going to be the arrival of an arctic front this weekend, bringing freezing temperatures, a chance of winter precip, and some fire weather concerns. Temperatures toward early morning will be low enough to allow for some freezing drizzle as well.
A cold front will cross the area Wednesday. Cold high pressure will build into the region for the end of the week. Moisture will return over the weekend ahead of another cold front. Afternoon highs will range from around 50 north to the lower 60s south. Low pressure is forecast to develop on the boundary over the southern Midlands and CSRA and move east. Overnight lows will range from the lower 40s north to the lower 50s south. The chance for rain will diminish during the day on Wednesday as the cold front crosses the area and moves off the coast.
Otherwise, have ticked temperatures up a tiny bit to match with obs that are a touch warmer than was in the forecast, and nudged other things to best keep in line with obs.
1245 PM EST Tue Dec 13 2016 Aviation An arctic cold front will move through today with frigid temperatures through the end of the week, along with some lake effect snow. Low pressure arrives for the weekend with several inches of snow possible and some mixed precipitation across southeast Lower Michigan.
334 PM CST Tue Dec 13 2016 As one area of high pressure departs the region, the next one will arrive later tonight. This high pressure will be over southwest SD Wednesday afternoon with colder temps likely over this CWA.
119 PM EST Tue Dec 13 2016 A trough of low pressure will bring a wintry mix of precipitation today.
336 PM EST Tue Dec 13 2016 The stalled boundary will lift north with a wave of low pressure along the coast tonight. Weak cold front will cross the area overnight and be offshore tomorrow morning.
SHORT TERM (Today through Sunday):500mb ridge axis over West Texas to become oriented NE-SW the next 24 -36 hours with weak northeast-east flow becoming increasingly southeast and allowing for an increase in moisture. As the ridge axis moves eastward drier air is seen on the water vapor loop which should keep the mid and upper levels of the atmosphere fairly dry today. Winds turn more southeast but remain light enough for the sea breeze acting as a better low level convergence and combining with the mid level trough producing a better chance of convection.
331 AM CDT SAT SEP 3 2016 The central CONUS was situated along the inflection point between longwave troughing across the western CONUS and ridging across the the Great Lakes Region.
Latest surface analysis shows high pressure sitting over the Great Lakes states and tropical system Hermine heading up the east coast. The result for us will be northeast winds keeping the cooler and drier air in place.
328 AM CDT SAT SEP 3 2016 Temps were in the low to mid 50s and winds were light.
The jet that has been moving across central Montana overnight, will continue to track east through the day ahead of an approaching Pacific trough. Temperatures will be cooler today behind the cold front that moved through last night. Tonight precip will increase in coverage over the west as more of the energy from the Pacific trough works into the area. As easterly upslope winds setup overnight Sunda, as the main trough axis begins moving over the area, there will be some decent precip totals in the upslope favored areas.
229 AM CDT SAT SEP 3 2016 228 AM CDT High pressure is settling over the region and will dictate our weather through Labor Day. The upper level low associated with Hermine will stall just off of the mid east coast tonight.
128 AM EDT SAT SEP 3 2016 The ridge of a strong high pressure area centered from northern Lake Michigan to Quebec will remain over the Great Lakes region through Saturday night. Lows tonight will again be pleasantly cool, in the lower to middle 50s.
641 AM EDT SAT SEP 3 2016 High pressure centered over Southern Ontario will gradually shift eastward through the weekend.
1213 AM CDT SAT SEP 3 2016 High pressure will continue to build into Arkansas tonight. High pressure and dry air continuing over the area will result in clear skies tonight and scattered cumulus on Saturday. High pressure will continue to build over Arkansas tonight. However, expect these clouds to dissipate this evening as high pressure continues to build over the state. Cooler and noticeably drier air is in place around the natural state today after a front made its way through Arkansas yesterday. Temperatures will be a few degrees warmer each day, and by Sunday southerly winds will return as a ridge builds back into the area.
340 AM EDT SAT SEP 3 2016 High pressure is firmly established over lower Michigan, southern Ontario, and into southern Quebec this morning. This in combination with the upper level ridge also centered over the Great Lakes will continue to produce clear sky over SE Michigan today through Sunday.
248 AM CDT SAT SEP 3 2016 Ridge of high pressure extending from the Great Lakes to the Southern Plains will dominate the weather across central Illinois today. An upper-level blocking pattern will be present across the eastern CONUS for the next several days. Further west, pronounced upper ridging will remain in place over the Midwest, leading to a prolonged period of warm and dry weather.
132 AM EDT SAT SEP 3 2016 High pressure will continue to build across our region from eastern Canada into the weekend. Surface temperatures are on track to reach highs in the low and mid 70s. Model consensus has remained essentially unchanged this period, indicating a slow northeastward wobble of Hermine in the western Atlantic, with a blocking ridge essentially shielding our forecast area from any significant effects.
324 AM CDT SAT SEP 3 2016 Will start the day with the sub tropical ridge extending westward across TX and NM with an upper trough over the west coast.
314 AM MDT SAT SEP 3 2016 Upper level trof along west coast with a resultant downstream southwest flow aloft over Colorado. Further west towards the Front Range and mountains some of the low level moisture will mix out while in addition, the upper trof will approach a bit before max heating so weaker storms there and through the mountains. Temperatures will be warmer today.
An early morning surface analysis showed the center of Tropical Storm Hermine located near Cape Lookout, North Carolina while high pressure was located over Lake Superior. Northeasterly flow in between across the lower Ohio Valley continues to bring dry and pleasant weather. For today, plan on a repeat of yesterday with mostly to partly sunny skies, highs in the low 80s and comfortable humidity levels. By Sunday, Hermine becomes post-tropical and stalls off the mid- Atlantic coast while high pressure holds to the north across the Great Lakes.
253 AM EDT SAT SEP 3 2016 High pressure will continue to build out out of the northern Great Lakes and into northern New England today. The high pressure venter shifts offshore late tonight but keeps a hold over the region.
308 AM CDT SAT SEP 3 2016 Today will be another nice day across the Ozarks as high pressure remains over the region. Highs will be in the lower to middle 80s during the day.
a trough of low pressure near the West Coast will maintain cooler than seasonal temperatures.
A trough/wave will move into the area today bringing isolated showers and thunderstorms mainly over the Central mountains this afternoon before becoming more widespread in the evening. This system today will also bring breezy winds as well as slightly cooler temperatures. models are continuing to drop an upper level low over the area bringing good precipitation chances for all areas.
514 AM EDT SAT SEP 3 2016 Strong high pressure over the Great Lakes region will gradually pull eastward into southeast Canada through Labor Day.
329 AM CDT SAT SEP 3 2016 Ridging, both at the surface and aloft, remains over the Upper Midwest this morning. This will allow a southwest flow to set up over the high plains placing the local region in between the main southwest flow and ridging to the east. The southwest flow is expected to have several short wave troughs in it, but the question will be whether these will pass close enough to the area to generate enough lift to help produce showers and storms. The first short wave trough in this flow should come out of Wyoming and pass through the Dakotas Sunday night with a trailing, weaker wave coming across Minnesota into northern Wisconsin.
347 AM EDT SAT SEP 3 2016 High pressure will remain in place across the region through the Labor Day weekend. Hermine will remain just off the mid atlantic coast through the Labor Weekend as high pressure and subsidence remain in place across the Ohio Valley region.
A low pressure system moving into the western states will bring dry southwesterly flow into Arizona. A trough across the western US will result in a dry southwesterly flow aloft this holiday weekend.
134 AM EDT SAT SEP 3 2016 High pressure over the Great Lakes and Northeastern U.
Latest satellite analysis showed the region under an upper trough in the wake of the stationary front to the south. Overnight conditions were on the more comfortable side with dewpoints in the lower 60s to the lower 70s. Models showed the surface inverted trough moving around our eastern counties for this afternoon. As far as temps are concern, highs for today will range from the upper 80s northwest to the lower 90s elsewhere. Highs for Sunday will be in the lower 90s. Lows for tonight will range from the middle 60s northwest to the lower 70s. then will push back into the lower to middle 70s for Sunday night.
358 AM EDT SAT SEP 3 2016 High pressure centered over Southern Ontario will gradually shift eastward through the weekend.
Early this Saturday morning, skies were clear to partly cloudy with temperatures in the lower to mid 60s. High temps will be a degree or 2 warmer than yesterday. An upper level high pressure system will strengthen overhead, and Hermine will drift slowly along the Mid Atlantic Coast. Sunday will be warmer and humidity levels will start to creep up. No rain is expected as overall atmospheric moisture remains skimpy under a building upper level ridge.
258 AM PDT SAT SEP 3 2016 Low pressure will remain over the region through Sunday with cooling temperatures as well as periodic breezes.
An upper trough will remain over the Inland NW through the holiday weekend. A significant wave embedded within this trough will pass south of the region into southern Oregon and Idaho on Sunday. At this time, it looks like southern Idaho and Montana will experience widespread showers as the Oregon trough interacts with moisture spreading up the spine of the Rockies. The Idaho Panhandle will likely be grazed by this system with the best chances of showers over the high terrain of Shoshone county. Additional scattered afternoon convection is progged by the NAM, GFS and ECMWF over the high terrain of northeast Washington and far north Idaho where a few thunderstorms may be embedded within rain showers.
Favorable flying conditions to continue across South Texas overnight and Saturday as High pressure centered to the west of the region continues providing clear to partly cloudy skies and light winds. the 500mb ridge across northern Mexico will continue to provide subsidence across the area even as weak perturbations move southward along the eastern periphery of the upper level ridge to the west. A weak inverted 500mb trough is expected to develop across the western Gulf of Mexico tonight into Saturday.
312 AM EDT SAT SEP 3 2016 In the wake of Hermine, an area of high pressure is building across South Florida. Dry air is moving in with the ridge and for the first time we have stars visible over the Keys in 5 days. A weak boundary moved through the Lower Keys earlier with a few showers and thunderstorms, but lost momentum as it crossed Key West. The ridge over South Florida and the Keys will begin to lift northward late Sunday. Southeast winds will gradually increase with the ridge axis moving northward.
247 AM CDT SAT SEP 3 2016 Early this Saturday morning, skies were clear to partly cloudy with temperatures in the lower to mid 60s. High temps will be a degree or 2 warmer than yesterday. An upper level high pressure system will strengthen overhead, and Hermine will drift slowly along the Mid Atlantic Coast. Sunday will be warmer and humidity levels will start to creep up. No rain is expected as overall atmospheric moisture remains skimpy under a building upper level ridge.