Aikyam-Lab/Synoptic-Bench huggingface dataset:
At 1730Z, the cold front extended from just southeast of ABI to just south of SJT and southwest to Ozona. A cold front will move through the area late this morning into the afternoon hours, resulting in north winds of 10 to 15 knots, with higher gusts. A weak cold front currently across the South Plains will approach the Big Country in the next few hours, the Concho Valley by mid morning, then move through the Interstate 10 corridor early this afternoon. Slightly cooler temperatures and gusty north winds of 10 to 15 mph can be expected behind the front. (Thursday through next Wednesday) South to southwest winds will return to the area on Thursday as lee troughing develops in response to increasing zonal flow aloft across the Southern Rockies.
330 PM EST Wed Nov 15 2017 High pressure over the middle Atlantic states will weaken and shift east early tonight.
/issued 334 AM CST Wed Nov 15 2017/ Upper ridge centered over Baja with axis extending north into Canada as an upper trough off the NW Coast slowly moves ashore today and Thursday. This ridge will build over Central Mexico and remain there so not expecting any big changes in the pattern. This trough will eventually pass across the plains and push a front through the area.
One more fairly nice day in store for today as modest ridging builds over the Rockies. It will be seasonably cool with highs in the low to mid 50s over most lower elevation sites.
102 PM EST Wed Nov 15 2017 Southerly wind will increase over the Ohio Valley as high pressure moves east and away from the region. An area of rain will spread into the region from the west this afternoon ahead of a cold front that will cross this evening. An axis of high pressure behind this front will cross the region from west to east Thursday night.
156 PM EST Wed Nov 15 2017 A weak cold front will approach the forecast area from the west tonight.
328 PM CST Wed Nov 15 2017 A northerly stream trough is currently racing east across the northern half of the country. Because of its lack of amplification and northern latitude, the cold front associated with it will stall before ever reaching the CWA. A gradual rebound in temps is likely over the later half of the week as that trough lifts and column heights rise.
242 PM EST Wed Nov 15 2017 High pressure will retreat offshore tonight. Low pressure will advance into New England late tonight.
259 PM EST Wed Nov 15 2017 An area of high pressure located over the eastern United States will remain in place tonight allowing for a breezy east to northeasterly wind flow to continue across South Florida. Low temperatures will range from the lower 60s across the northwestern interior sections to the lower 70s across the east coast metro areas. High pressure will continue to be the dominant feature which will allow the breezy east to northeast wind flow to continue. High temperatures across the region will range from the upper 70s to the lower 80s through the end of the week. As the weekend approaches, both of the GFS and the ECMWF show a stronger frontal passage through the region which will bring drier and cooler air to South Florida.
A shallow upper trough moving through the Midwest will send a weak cold front that is expected to wash out over South Central TX by tonight. A weak inverted trough extending from the Rio Grande Plains into Central TX should keep the I-35 Corridor in the warm and moist sector through the period although the relative weak pressure gradient could lead to an occasional NEly surface wind this evening.
340 PM CST Wed Nov 15 2017 The cold front has cleared the area with the clouds lingering across the southern part of the area.
1233 PM CST Wed Nov 15 2017 Updated for 18Z aviation discussion 18Z TAF discussion: Showers were approaching ahead of a slow moving cold front. Weak ridging aloft will slide east of the region today. This in turn, will result in high pressure at the surface weakening across the forecast area, allowing a cold front to drop into the CWA from the northwest late today into tonight. However, some isolated to scattered showers can't be ruled out, primarily in the vicinity of the Highway 82 corridor this afternoon and early evening. Again, with clouds gradually increasing across the forecast area, highs today will range from the upper 60s to the lower 70s.
Cu field is trying to dvlp but SSWrly winds in the lowest few thousand ft may negate a thick Cu field from occurring (xcption being across KVCT).
200 PM PST Wed Nov 15 2017 Mild weather through Thursday with occasional high clouds ahead of a trough passing by to the north.
322 PM CST Wed Nov 15 2017 A broad area of high pressure will sink southward across the eastern portion of the region tonight. A developing low pressure system west of the region will strengthen the pressure gradient after 6Z with winds becoming southerly over the western CWA. The low pressure system will reach western SD by 18Z with strong southerly winds expected for this CWA. The highest winds should occur between the Missouri and James River around 15Z, then the James Valley eastward between 18-21Z. With 925 mb temps around 0Z in NE SD should produce temps in the upper 30s, to the lower 40s.
High pressure will slowly weaken and sink South through Tonight. An inverted trough over the coastal waters will keep an enhanced pressure gradient which will keep winds up along the coast, along with convergent banding producing coastal clouds. Temperatures will range from the lower 40s over inland SE GA to the middle 50s along NE FL coast.
Thursday night a band of light precipitation will form in a weak baroclinic zone across southwest into North Central North Dakota, along the leading edge of a cold front. Sounding analysis confirms at least a potential for mixed precipitation with rain, freezing rain and possibly some sleet and snow all possible. However this should be very brief and light so see little consequence to any freezing precipitation.
Surface cold front at 3 am was bisecting Iowa, running from a weak low pressure center near Minneapolis through central IA into far northwest MO.
There are areas of freezing fog that have developed along the HiLine.
939 AM MST Wed Nov 15 2017 High pressure remains in control today though upper level winds will become more southwesterly as opposed to zonal (or westerly) like they have been over the last few days. Thursday, a deep trough will finally start digging down the west coast as a strong jet approaches the area.
1115 AM CST Wed Nov 15 2017 Broad ridging within zonal flow will help bring the sun out with seasonably warm temperatures. Highs should be in the lower to mid 50s, despite the cold front passage from last night.
439 PM EST Wed Nov 15 2017 Light rain will accompany a cold front across the Upper Ohio Valley Region tonight. The early eve update featured only cosmetic changes and tweaks to hourly trends as a swath of light is sliding across the region with the advance of a cold front. With the low center over the Great Lakes, no uptick in intensity is expected although some bright banding is evident on radar. The 500 mb trough axis will cross on Thursday, with northwest flow/lake enhanced showers continuing. Any shower activity will end Thursday evening as the trough lifts out.
Another round of fog is expected tonight as moisture depth increases in the lower levels with drier air present aloft.
352 PM CST Wed Nov 15 2017 Thickening cloud cover situated south of weak mid-level troughing and downstream of a west central Texas stationary surface boundary. Most of the day will be spent in the 70s with mid afternoon temperatures nearing the lower 80s once again. Texas falls on the eastern side of the southern-based 5H ridging (westerly flow aloft) and. with high pressure moving across the Ohio River Valley tomorrow maintaining near 1.
916 AM MST Wed Nov 15 2017 A dry and cool day can be expected with high pressure over the region and high temperatures in the upper 30s to 40s. High pressure ridging will build once again across the forecast area today behind yesterdays cold front and upper level disturbance that brought the precip to the area. An upper low and trough off the Pacific northwest coast will slowly move inland tonight into the day Thursday. The ridge axis will shift east Thursday with heights lowering as the upper low and trough push east across the Northern Rockies.
403 PM EST Wed Nov 15 2017 A cold front will move through this evening. High pressure will build into the region for Thursday.
319 PM CST Wed Nov 15 2017 134 PM CST At 100 pm this afternoon, a cold front was in place from near UGN south-southwest to near PNT. High pressure will build across the mid and upper Mississippi Valley midday Thursday then slide east across northern Illinois and northwest Indiana through the afternoon. Winds will veer to the north and diminish as this occurs, and eventually switch to an east to southeasterly direction behind the ridge axis during the afternoon.
416 PM EST Wed Nov 15 2017 High pressure will move off the New England coast today.
A strong cold front is still expected to move across northwest Montana and central Idaho Thursday morning and across southwest Montana by the afternoon. There is the potential for wind gusts to 45 mph across southwest Montana which could be an impact to high profile vehicles and could briefly cause low visibility for travelers on Highway 1 and Interstate 90 with the snow from the cold front in the afternoon.
202 PM CST Wed Nov 15 2017 Cold front passing through the region late this afternoon will bring an end to the light rain and drizzle now occurring over much of the area.
346 PM EST Wed Nov 15 2017 High pressure over the middle Atlantic states will weaken and shift east early tonight.
A cold front will also gradually move southeast this afternoon to evening, starting in the northwest and making it to south AR later. Clouds will also gradually break behind the cold front and become VFR with only spotty MVFR ceilings. The cold front was well behind the front and at 10 am was getting close to far NW AR. The main rain chances will be with the lift, while much lower chances with the cold front. Winds will shift to the west then northwest to north with the cold front through the afternoon and this evening.
115 PM EST Wed Nov 15 2017 High pressure should maintain dry weather through part of today. Rain is expected to return with a late in the day and this evening with a cold front. The wave and and associated cold front are progged to cross the Great Lakes and Upper Ohio Valley area late this afternoon and evening, returning showers to the area. After the initial wave and cold front exit, an upper trough is progged to approach the area late tonight, maintaining rain and possible snow shower chances. The upper trough is expected to cross the Lower Great Lakes/Upper OH Valley regions Thursday. Maintained rain and snow shower chances, with the highest POPs confined N of I 80 where some limited lake enhancement is possible.
900 AM PST Wed Nov 15 2017 Mild weather through Thursday with periods of high clouds ahead of a trough passing by to the north.
320 PM EST Wed Nov 15 2017 Showers this evening, with cold front crossing tonight. High pressure crosses Thursday night.
1240 PM EST Wed Nov 15 2017 A cold front will bring widespread showers today with highs generally in the mid to upper 40s. This will be followed by cooler and mainly cloudy conditions into Thursday.
308 PM EST Wed Nov 15 2017 Cooler air will continue to settle across the region tonight.
SHORT TERM (Tonight through Thursday Night): 500 mb ridging will remain in entrenched over Mexico and the western Gulf coastline throughout the end of the workweek. Because of the persistent 500 mb ridging in combination with the pretty strong diurnal heating effects will lean on the high side of the short term temp guidance especially for tomorrows highs.
High pressure situated over the Mid Atlc region will undergo a temporary weakening tonight and into Thursday. High pressure to the north will be re-enforced by another high center migrating Ewd from the Grt Lakes/OH Valley late in the day.
A cold front will cross the region Thursday morning.
Issued by National Weather Service NORMAN OK 240 PM CST Wed Nov 15 2017 /Tonight and Tomorrow/ As the cold front makes its way through the region, radar trends show a few transient light showers. A temperature gradient across the CWA will reflect the position of the frontal boundary, with southeast portions of the area keeping warmer temperatures while the rest of the region cools off.
Cold front has passed the region and was located well into New Mexico. A much cooler day expected as compared to yesterday. Max temps expected to reach into the 55-60F range most regions with cooler temps in El Paso county. Over the higher terrain expect highs in the 50s, with 30s in the mtns.
301 PM EST Wed Nov 15 2017 Rain will arrive tonight ahead of a cold front.
341 PM EST Wed Nov 15 2017 A cold front is poised to shift southeast across the Ohio River and across portions of Kentucky late this afternoon, traversing eastern KY this evening and overnight. By thursday night, the location of the high will be passing almost directly overhead, subduing winds and making for ideal conditions for net radiational cooling. Ridge valley splits will be likely, especially in the east. Rain tonight could provide enough lingering moisture to also promote fog, especially in theses cooler valleys.
1207 PM EST Wed Nov 15 2017 Cigs will lower through the rest of today as an weak cold front approaches.
Gusty northeast winds will usher much cooler temperatures into southeast Arizona Thursday, and a widespread freeze from Tucson eastward Thursday night. Expect warmer temperatures to return by the weekend. The upper trough axis continues to slowly shift south across southeast Arizona but another system will pass through our area Thursday. This will be the coldest air thus far this season and freezing temperatures are a good bet east of Tucson.
With the surface temperatures fairly warm, do not think there will be a chance of any freezing at the surface.
A progressive mean polar low will remain in place across most of the eastern half of the country and successive troughs will rotate southeast bringing arctic fronts and in some cases light wintry precipitation. On Thursday, a weak reinforcing cold front will arrive by late morning into early afternoon as the high pressure system to the west shifts east and a longwave trough embedded within the polar low moves south. The main noticeable impact during the day will be a wind direction change and slightly cooler temperatures while a dry/mostly sub- freezing profile means little in the way of precipitation. With these waves and just enough moisture overrunning the cold polar airmass, could see light wintry mix of sleet/rain/snow over southern Cullman, Marshall, and DeKalb as we experience sub-freezing overnight lows (20s).
250 PM MST Wed Dec 6 2017 Current surface analysis shows a Canadian cold front sliding south of the forecast area now. Upper level analysis shows low pressure over southern Hudson Bay, with large trough covering a good portion of the US. A ridge lies along the west coast with strong northwest flow remaining over the Northern Plains. A warmup will take place for late week and into the weekend as the large upper trough shifts a bit to the east, allowing warmer air under the western ridge to gradually build in. Cold front will shift back north and east as a warm front on Thursday, allowing highs to get back to near average levels in most areas.
Persistent northwest flow aloft will bring a series of mainly dry cold fronts across our region. The first dry cold front will move southeast across our region tonight.
Westerly flow of cold air will continue this entire period under a large upper level trough. Some of the higher terrain of southern Cayuga into Madison will have the highest snow amounts of maybe 2 inches.
Highs tomorrow in the upper 30s to low 40s may actually occur during the late morning/early afternoon before temperatures start dropping again behind the second surge of cooler air. A few lower 20s will be possible in some of the low-lying areas, mainly in our southern counties.
320 PM CST Wed Dec 6 2017 The Upper Midwest remains under the influence of an expansive area of high pressure located over southern Hudson Bay, leading to cyclonic flow across the area. As the low slowly moves off to the east, the pressure gradient will slowly relax across the region. An upper ridge will be over the western CONUS/British Columbia region putting the Northland in northerly flow aloft. The western ridge will weaken some late in the period and shift a bit further west but the flow will remain northwest over the Northland.
Gusty winds and much cooler temperatures will also occur Thursday, then a widespread freeze for locations east of Tucson Thursday night.
Temperatures are mainly in the low 40s across the Midsouth. mainly in the low 50s.
A reinforcing cold front associated with a clipper system will move across the region tonight.
For the remainder of the day we will see a brisk northwest wind and cold advection so temps today will be similar to a little cooler than yesterday with mid 20s to mid 30s for highs.
Before clouds build back in from the northwest late Thursday, sunshine and the departing trough aloft will bring warmer weather with highs expected to reach the teens to 20s, near normal values.
237 PM EST Wed Dec 6 2017 A cold front will stall off the coast tonight.
1151 AM CST Wed Dec 6 2017 Updated the forecast to increase wind speeds/gusts and sky cover associated with the passage of the backdoor cold front pushing through today. While dry air will remain in place in the lower levels of the atmosphere. Even though there is an upper level wave moving through yet Thursday and Thursday night, the low level moisture decreases and skies will be mostly clear. Behind the wave, there will be another push of cold air and Thursday will be cooler.
234 PM CST Wed Dec 6 2017 An elongated region of H925-H850 Fg forcing was wrapping southward along the upstream flank of an H500 trough axis early this afternoon. CAA behind this line coupled with large T/Td spreads and wet bulb temps near freezing has allowed SN to be reported despite surface temps near 40 degrees. Surface ridging builds for the day on Thursday with and -12 C H850 thermal trough overhead and keeping surface temps around the freezing mark.
By late afternoon into this evening, somewhat higher saturation in the lower levels should cause a greater number of airports to drop to MVFR category conditions tonight into early Thursday morning and IFR late Thursday morning as fairly widespread rain develops and persists. A pool of cold and stable air has advected into the low levels on the back of strong 30+ knot winds residing below 900mb. Isentropic forcing over the low level cold pool will continue to produce overcast skies and stratiform rain until the southwest flow aloft shifts to the northwest.
At the surface , high pressure settling over the area today will result in light winds through the period.
253 PM CST Wed Dec 6 2017 Backdoor cold front produced a snow squall moving south this afternoon. Wet-bulbing and cold air advection will bring a significant cooldown of 10-15 degrees as the front passes through, and temperatures tomorrow will be considerably cooler with highs only in the lower 30s. We remain within north northwest flow within an amplified pattern of ridge to the west and trough to the east.
1149 AM CST Wed Dec 6 2017 Water vapor and 500 mb analysis early this morning is indicative of a very wintry pattern over the north central CONUS with northerly flow across the area on the western periphery of a deep upper trough south of Hudson Bay. A broad upper trough will rotate southeastward through the day, and although lift is not particularly strong, with cyclonic flow and soundings indicating a relatively deep saturated snow growth zone, expect at least scattered snow shower/flurry development today into tonight which could amount to a light coating of a few tenths of an inch.
309 PM CST Wed Dec 6 2017 Area of lgt precip has slowly shifted south of I-20 with high pressure to the north. Dewpoints have lowered to mainly the lower 20s across northern portions of the area, with mid lvl cloud decks extending nwd to near I-40.
A weak cold front will push into the region from the north on Thursday, with winds increasing. This will allow temps to remain even cooler for Thu afternoon.
Very little additional warming south of Interstate, but mid lvl decks to slowly erode from the north this aftn as high pressure increases. An upper impulse is overrunning our cold front from yesterday. /issued 323 AM CST Wed Dec 6 2017/ 700mb trough lagging behind surface boundary allowing for southwest flow in lower-levels to overrun cold airmass across the ArkLaTex. Periods of widespread rain to continue throughout the day and into tonight mainly south of interstate 20 before gradually clearing on Thursday as 700mb trough finally eases across the region. Temperatures today to climb into the low to mid 50s with overnight lows forecast to fall into the 30s.
116 PM CST Wed Dec 6 2017 Broad upper trough remains extended from Quebec through the Great Lakes and into the central Rockies, with a number of impulses rotating through this feature. Upper trough will continue to translate east on Fri leaving strong northerly flow over the Plains for Fri as yet another piece of energy dives down the backside of the trough Fri night across the western Great Lakes into the Ohio Valley. This feature will carve out another deep upper trough over the eastern Conus for the start of the work week.
112 PM EST Wed Dec 6 2017 A cold front slowly crossing the forecast area will reach the coast by late afternoon.
314 PM CST Wed Dec 6 2017 This afternoon, the upper air pattern reflects a longwave RIDGE over coastal western North America and a TROF over much of the middle and eastern portions of North America. Pcpn-types will initially favor rain, possibly mixing with sleet, with onset during the late afternoon and early evening, but with some persistence (factoring in cooling from evaporation in the lower column) and with general cooling during the evening anyway, this will increasingly favor snow as the pcpn-type.
VFR will continue through the next 24 hours with dry high pressure.
344 PM CST Wed Dec 6 2017 Current surface analysis places high pressure over the Canadian prairies settling into the northern plains. Upper level analysis places trough stretching from the Great Lakes towards the four corners region with ridge over the Pacific northwest. temperatures will moderate some with highs climbing to near average as Pacific ridge starts to scamper east.
Tonight and Thursday Large scale upper trough will prevail over the western Great Lakes region tonight, providing cloudy skies with light snow showers or flurries across the forecast area. A weak ridge will edge over the western Great Lakes region on Thursday, bringing a swath of dry air over the area and turning mid level winds to a more westerly direction. Despite the sunshine, highs will remain below normal with temperatures ranging from the upper teens across the north, with highs in the lower to middle 20s across the south. Thursday Night Through Wednesday Cyclonic upper flow with a few upper troughs rotating through will make for cold temperatures with potential for a couple light snows from clipper systems.
With strength of high pressure ridge and continuing inversions, expect this to be situation going forward through the week. High pressure is dominating western states weather. Unlike yesterday, the low clouds aren't very low, mostly at or slightly above 2000ft AGL.
316 PM CST Wed Dec 6 2017 In the wake of the cold front that brought light snow to the region this morning, a tight pressure gradient will continue to force gusty northwest winds in the 25 to 35 mph range through sunset. The amplified upper-level flow pattern remains, with a ridge centered over the the West Coast and a trough stretching from Hudson Bay down through the eastern states.