Aikyam-Lab/Synoptic-Bench huggingface dataset:
/issued 811 PM CST Mon Nov 22 2021/ A broad upper-level trough is situated over the eastern CONUS this evening with a surface anticyclone over the Mid MS Valley. Temperatures have already fallen into the lower 30s across portions of west TN and will continue to drop throughout the overnight period. Minimum temperatures will range from the mid 20s to the lower 30s with the lowest temperatures generally over interior portions of west TN. Sunny skies and brisk NNW winds prevail across the Mid-South as high pressure surges into the region. High pressure will settle over the region.
138 AM EST Tue Nov 23 2021 This afternoon an upper level low was just east of James Bay with a trough extending down into the northern Great Lakes. An upper level ridge was over the northern Rockies with troughing moving into the Pacific Northwest. A trough will deepen on Tuesday from the lee of the Rockies and east into the Northern Plains.
1021 PM MST Mon Nov 22 2021 Water vapor shows upper ridge axis extending through the Rockies, with surface analysis showing a deepening trof in the lee of the Rockies. Very mild weather will continue through Tuesday with upper ridge building eastward. Southwest winds will gradually increase overnight as lee trof advances eastwards. Surface trof will work across the region on Tuesday, with thermal ridge overhead resulting in high temps well into the 50s for northeast WY and northwest SD, with 60s and even some lower 70s south/east of the Black Hills. Cold front moves through Tuesday night, with gusty northwest winds and much cooler temps filtering in.
840 AM CST Tue Nov 23 2021 A cold start to the day with most locations in the low to mid 20s.
A trough of low pressure approaching the coast of Baja California will keep clouds across the area today along with a few isolated showers, mainly over eastern Mohave County. Temperatures will decrease on Wednesday as north winds bring in cooler air, and these cooler temperatures will remain in place for Thanksgiving Day.
(Today through Wednesday afternoon) Strengthening w-sw mid-level flow signals the development of a lee trof and low-level thermal ridge, ergo noticeably warmer today despite the presence of high clouds. Mid- level flow backs some on Wed, and the low-level thermal ridge will be farther e into the PB with gusty downslope winds.
514 AM EST Tue Nov 23 2021 A powerful high pressure system will continue to expand over the Tennesse Valley and northern Gulf of Mexico while pushing a frontal boundary through the Peninsula of Florida. The trough that moved through the Keys yesterday is currently to the northeast and southwest of the Florida Straits and will continue to move away from the area.
555 AM EST Tue Nov 23 2021 Aviation - Tranquil weather through Wednesday - A high pressure ridge will continue to bring fair wx today.
With aforementioned subsidence, high pressure will build on Wednesday resulting in closer to normal temperature.
The first cold front has moved through South Florida with a secondary cold front currently over Lake Okeechobee that will move southward through South Florida through the early morning hours and into the Florida Keys today. This will allow for high pressure to build into the Florida Peninsula from the north resulting in dry northerly flow overspreading the area. Given the dry postfrontal airmass and building high pressure, the weather will remain largely dry through Wednesday with just a few isolated showers (fueled by the cooler air aloft) possible over the Atlantic and near the east coast.
Otherwise, strong ridging builds across the region for the second half of the week maintaining dry weather with mild daytime temperatures and cool nights.
A cold front swinging through today will bring snow showers across northern Nevada mountains, along with breezy to windy conditions across the region. Slightly cooler today, but much cooler tomorrow with highs only in the mid 30s to mid 40s. A trough swinging through the northwest today will clip northern Nevada and push a cold front across the region. Cooler temps today, especially across the north, with highs generally in the 40s across the north and 50s across the central. Dry but sunny with lighter winds as flat ridging begins to push onshore. Much cooler with highs in the mid 30s to mid 40s.
and Wednesday After a cold start to the morning, winds will turn southerly as a ridge of high pressure tracks to the east of the area. A low pressure system developing across the northern Plains will cause winds to increase this afternoon as the pressure gradient tightens across the region. Gusty winds are expected to continue tonight as the low and associated cold front track towards the upper Mississippi Valley region. The cold front is then slated to make its way over northeast Wisconsin by Wednesday afternoon. Despite the approaching cold front, limited moisture will keep the region dry through Wednesday.
339 AM MST Tue Nov 23 2021 A surface cold front moves through the region tonight through Wednesday morning, providing cooler temperatures and areas of light snow. Snow is expected to begin over the Northern Rockies by late morning, then spread east of the Continental Divide later into the afternoon or early evening with the passing cold front. Temperatures trend warmer due to an amplifying upper level ridge over the Pacific Northwest, and strengthening downslope winds. A cold front will bring an increasing chance of rain and snow showers to much of the area after 18Z with at least mountain top obscuration.
Thanksgiving morning will see a mix of rain and snow before warmer temperatures begin to drive snow levels up heading into the holiday weekend. Overnight precip types have been rain, snow, or mix with isolated pockets of freezing rain from Wenatchee to the West Plains. By the mid morning, a wet snow is expected as 850MB temperatures are expected to be freezing. Tonight and Wednesday: Incoming high pressure will lead to quiet overnight and tomorrow period.
Otherwise, wind should stay below 15 mph except on high elevation ridges.
/28/ Quiet weather will continue across the region as high pressure resides at the surface and surface ridging moves in through the course of today. While we start the day chilly, we will warm into the mid/upper 50s in the Golden Triangle to the lower 60s across the rest of the area. /28/ On Wednesday, an upper/midlvl ridge will persist in the southeastern region, keeping ArkLaMiss cool and dry.
The wind will flip around out of the north tomorrow and will be just as breezy out of the north, which will make it 15 to 20 degrees cooler tomorrow. Temperatures will bottom out on Thanksgiving with highs from the upper 30s to mid 40s, but at least the wind will finally be light as high pressure builds in.
346 AM CST Tue Nov 23 2021 A quiet weather pattern will continue through the short term as upper level ridging remains in place across the western US. An approaching trough on Wednesday will push a cooler airmass into the region on Wednesday. While cooler temperatures are expected with this trough, precipitation is not expected and conditions will remain dry through Wednesday.
An area of low pressure off the southern California Coast and a trough of low pressure moving across the Pacific Northwest will merge over Arizona today and Wednesday.
Lows tonight will be a bit warmer due to increased winds and increasing cloud cover. A cold front to the NW of AR will move SE into the state by the end of the short term period late Wed night.
Previous runs kept these features separate but runs yesterday and again this morning have the disturbances phasing into one long wave trough as it moves through our area. High pressure will start building in bringing a return to more dry conditions that looks to persist for the foreseeable future. Ridging continues to build into the area Wednesday night.
Regardless, the morning low temperatures are still expected to fall into the low 20s to upper teens for much of southern Wisconsin. As high pressure moves out of the Great Lakes Region early this morning, a low pressure system in the Northern Plains will move northeast toward lake Superior/Ontario. Winds will shift to southerly ahead of the approaching low pressure system and strengthen. As the low tracks toward the northeast it will deepen and tighten the pressure gradient. The strong southerly winds will bring some warmer temperatures into Wisconsin for today and Wednesday. The cold front associated with the low pressure system will slowly drag across Wisconsin late Wednesday evening.
331 AM CST Tue Nov 23 2021 Surface ridging quickly departs over the Great Lakes this morning as a wave crossing the Rockies initiates cyclogenesis over the Northern Plains. However, this time around will be in conjunction with warm air advection as 850mb temps climb back above freezing. Broad return flow tapping into Gulf moisture will direct a plume of higher moisture into the Lower Great Lakes region. One thing to keep an eye on Wednesday night into Thanksgiving morning is potential for light precipitation developing across eastern MN and northern WI as the upper trough slides through. Current forecast soundings suggest this could be in the form of light snow, or potentially freezing drizzle if the column struggles to saturate deep enough into colder air aloft.
However a drastic cooldown will follow as a cold front moves through Wednesday, resulting in a pretty chilly Thanksgiving.
532 AM CST Tue Nov 23 2021 High pressure centered over the Ohio Valley region will continue to bring dry conditions to the area today. However, as this High begins sliding east, and with a developing Low over the northern Plains, this will increase winds from the southwest late today through Wednesday morning. This will bring warmer temperatures back across the mid-Mississippi River Valley Wednesday, as highs peak in the 50s.
The ongoing forecast has been pretty consistent with the lowest relative humidity and strongest winds staying a little to our south.
/issued 247 AM CST Tue Nov 23 2021/ An upper level ridge axis has shifted to the east of the forecast, being quickly replaced by southwesterly flow aloft downstream from an upper level short wave trough located off the coast of Baja California. Warm advection on the increased southerly component to the low level flow will result in further warming today with temperatures expected to climb into the 70s areawide. Positively tilted upper troughing will begin pushing into the central US by late tomorrow evening. This will push a cold front through the region before midnight tomorrow night.
343 AM CST Tue Nov 23 2021 High pressure centered over the Ohio Valley region will continue to bring dry conditions to the area today. However, as this High begins sliding east, and with a developing Low over the northern Plains, this will increase winds from the southwest late today through Wednesday morning. This will bring warmer temperatures back across the mid-Mississippi River Valley Wednesday, as highs peak in the 50s.
546 AM CST Tue Nov 23 2021 Surface ridging quickly departs over the Great Lakes this morning as a wave crossing the Rockies initiates cyclogenesis over the Northern Plains. However, this time around will be in conjunction with warm air advection as 850mb temps climb back above freezing. Broad return flow tapping into Gulf moisture will direct a plume of higher moisture into the Lower Great Lakes region. One thing to keep an eye on Wednesday night into Thanksgiving morning is potential for light precipitation developing across eastern MN and northern WI as the upper trough slides through. Current forecast soundings suggest this could be in the form of light snow, or potentially freezing drizzle if the column struggles to saturate deep enough into colder air aloft.
445 AM EST Tue Nov 23 2021 A powerful high pressure system will continue to expand over the Tennesse Valley and northern Gulf of Mexico while pushing a frontal boundary through the Peninsula of Florida. The trough that moved through the Keys yesterday is currently to the northeast and southwest of the Florida Straits and will continue to move away from the area.
534 AM CST Tue Nov 23 2021 A quiet weather pattern will continue through the short term as upper level ridging remains in place across the western US. An approaching trough on Wednesday will push a cooler airmass into the region on Wednesday. While cooler temperatures are expected with this trough, precipitation is not expected and conditions will remain dry through Wednesday.
This will begin to bring in some warmer air today, aiding the sunshine in boosting temperatures. On Wednesday, an upper trough will approach the area.
High pressure was centered over southern IL this morning and is forecast to drop southeast into KY and TN this afternoon. After a cold start this morning in the 20s, high temperatures should reach the lower 50s in valley areas, with middle to upper 40s atop the higher plateau locations.
The valleys across northwest Montana may see periods of light freezing rain along with snow around daybreak this morning. After the cold front passes this evening, there will be a slight chance for a few snow showers, developing into bands.
427 AM MST Tue Nov 23 2021 An upper trof moving through the Pacific Northwest and northern Rockies will drop a cold front through the region this afternoon. Wednesday will be much colder as the upper level trough engulfs the Western CONUS and Canadian high pressure drops south into the area. The cold will be short lived as another ridge quickly builds over the West, bringing warmer downslope flow into Montana to begin the holiday weekend.
A surface cold front moves through the region tonight through Wednesday morning, providing cooler temperatures and areas of light snow. Snow is expected to begin over the Northern Rockies by late morning, then spread east of the Continental Divide later into the afternoon or early evening with the passing cold front. Temperatures trend warmer due to an amplifying upper level ridge over the Pacific Northwest, and strengthening downslope winds. However, clouds will spread over the region from the west today, with ceilings lowering to MVFR conditions from north to south with a passing cold front.
622 AM EST Tue Nov 23 2021 Dry weather will continue today through Wednesday as high pressure tracks from Kentucky to the East Coast. Widespread rain is forecast for Thanksgiving Day along a cold front traveling from the west.
Large area of high pressure will continue to build through the next 36 hours. Overnight lows will not be as low as current obs, but should still be around or just below freezing again. Trends are running a little bit warmer that the last runs so will allow the current Freeze Warning to expire and then an additional one will be needed where the highest confidence is.
232 PM CST Tue Nov 23 2021 Forecast highlights in the short term period will focus on the impacts associated with a mid level trough and sfc cold front set to move through the region tonight through Wednesday morning. Currently, upper level ridge pushing off to our east in response to a strong mid level trough approaching the Northern Rockies. Mid level trough advances east over the Rockies this evening, driving a sfc cold front into northern ND after 00Z. Cold front then continues to push southward, reaching the ND/SD border early Wednesday morning. Coupled with the wind, wind chill temperatures will range from the lower teens south to single digits below north.
The trough causing this pcpn will move east of us this evening, with snow showers lingering in the central Idaho mountains, but clearing elsewhere. Areas of MVFR with local IFR/LIFR as snow showers move eastward, associated with cold front. Surface winds: variable 5-15 kt, becoming W-NW 10-20 kt at TAF sites behind cold front late this morning/afternoon.
246 PM EST Tue Nov 23 2021 High pressure will move overhead overnight.
308 PM EST Tue Nov 23 2021 Surface analysis reveals a 1029mb high pressure system with Canadian origins centered over Kentucky and Tennessee this afternoon. This has resulted in dry and cool conditions today as current temperatures are just now getting into the low and mid 40s. Afternoon highs will be about 10-12 degrees warmer tomorrow compared to today as southerly/southwesterly flow advects in milder air.
Winds will remain elevated at most terminals overnight with the low-level jet. (Today through Wednesday afternoon) Strengthening w-sw mid-level flow signals the development of a lee trof and low-level thermal ridge, ergo noticeably warmer today despite the presence of high clouds. Mid- level flow backs some on Wed, and the low-level thermal ridge will be farther e into the PB with gusty downslope winds.
When the western CONUS upper level ridge shifts east, the CWA gets under low level waa.
Surface ridging currently extends across the region, with clear and dry conditions areawide. /DL/ Prior discussion below: Quiet weather will continue across the region as high pressure resides at the surface and surface ridging moves in through the course of today. While we start the day chilly, we will warm into the mid/upper 50s in the Golden Triangle to the lower 60s across the rest of the area. /28/ On Wednesday, an upper/midlvl ridge will persist in the southeastern region, keeping ArkLaMiss cool and dry.
Strong WAA has been ongoing across the the Upper Midwest this afternoon with highs topping out in the 40s to even the low 50s in south-central Minnesota. Mid to high clouds increase in coverage through the overnight hours ahead of this upper trough and persist into the day on Wednesday. A cold front currently over the eastern Dakotas meanders southeastward through the forecast area during the afternoon on Wednesday. Deterministic soundings behind the front have backed off on the strength of the low level jet with winds at the top of the mixed layer only topping out in the 25-30 kt range.
With regard to the present Red Flag Warning, although winds have been somewhat marginal over south central SD and the James River Valley, the low RH values as stated above lend to the critical fire danger over that area. A cold front will slide across the area tonight into Wednesday morning. On Wednesday the cold front will exit out of the area, with the stronger cold air advection sweeping into the region during the day. Early day temperatures will range from the mid 30s to upper 40s, then into the lower 30s to lower 40s by afternoon.
1233 PM EST Tue Nov 23 2021 Cold weather will give way warmer conditions for Wednesday. Another cold front with rain can be expected on Thanksgiving. The sky will clear by evening with building high pressure. High pressure with neutral to weak warm advection, will result in a dry Wednesday with seasonable temperature.
A cold front will move through the Panhandles on Wednesday with north winds of 20 to 30 mph behind it. An upper level short wave trough will move across the Panhandles Wednesday night in the northwest flow aloft. This system will drop most of its precip to the west of us, over the mountains and to the east and south of us along the cold front. The low level air mass across the Panhandles will remain too dry to have much hope of any precipitation Wednesday night.
1137 AM CST Tue Nov 23 2021 Surface ridging quickly departs over the Great Lakes this morning as a wave crossing the Rockies initiates cyclogenesis over the Northern Plains. However, this time around will be in conjunction with warm air advection as 850mb temps climb back above freezing. Broad return flow tapping into Gulf moisture will direct a plume of higher moisture into the Lower Great Lakes region. One thing to keep an eye on Wednesday night into Thanksgiving morning is potential for light precipitation developing across eastern MN and northern WI as the upper trough slides through. Current forecast soundings suggest this could be in the form of light snow, or potentially freezing drizzle if the column struggles to saturate deep enough into colder air aloft.
251 PM CST Tue Nov 23 2021 Cold front moves SE through the area this evening and overnight shifting winds toward the NW by sunrise. Soundings show sufficient momentum transfers and slight mixing through the lower levels. Saturation is found through the lower levels, with less inverted v structure and dry air aloft. Synoptic forcing from the trough looks to translate faster than the frontogentic energy thus limiting higher QPF for the region. In order to truly have a longer duration of below 1/2 mile visibility conditions would need to be cooler and winds on the stronger side. Behind the front temperatures are on the cooler side dropping through Thanksgiving morning. The coming week will likely mark a transition from the somewhat mild mid-fall period into a cooler and wetter late fall period.
345 PM EST Tue Nov 23 2021 High pressure will move overhead overnight.
High pressure influences will keep winds light and skies mostly clear at all sites throughout the taf period.
A trough of low pressure approaching the coast of Baja California will keep clouds across the area today along with a few isolated showers, mainly over eastern Mohave County. Temperatures will decrease on Wednesday as north winds bring in cooler air, and these cooler temperatures will remain in place for Thanksgiving Day. It is still technically possible that the higher elevations of southern and far eastern Mohave County could see a few light showers or sprinkles today but chances are really low as indicated by the latest CAM and HRRR model runs. Temperatures today are expected to be mild - a little warmer where sunshine is plentiful and a little cooler in areas where cloud cover persists for much of the day.
1259 PM CST Tue Nov 23 2021 Temperatures will be on the increase into Wednesday in advance of a surface cold front.
High pressure building into the Southeast US today behind yesterday's cold front. It will be noticeably cooler today, with highs reaching the upper 60s to low 70s across much of the area and mid-60s well north of I-4. We'll remain dry overnight as high pressure continues to build eastward. Mostly clear skies and breezy northwest winds will lead to another round of cold temperatures with lows expected to drop into the low to mid 40s inland with temperatures in the upper 40s to mid 50s expected near the coast. VFR conditions prevailing as high pressure builds into the area. Northerly winds 20-25kts expected through this afternoon, as the pressure gradient remains tight behind yesterday's cold front.
A cold front looks to move through our area tomorrow with the colder air arriving tomorrow night into Thanksgiving Day.
103 PM MST Tue Nov 23 2021 Water vapor shows upper ridge over the Northern Plains/Upper Midwest, with trof building through the western CONUS. At the surface, low is located over far western SD with trof extending southward into eastern CO. Cold front is diving south through southern ALTA. Cold front will move into the area late tonight, with increasing northwest winds and much cooler air filtering in. Thanksgiving will be a bit warmer as the upper trof shifts to our east, with highs mainly in the 40s.
245 PM EST Tue Nov 23 2021 Upper level trough along the eastern seaboard will continue to move east out into the Atlantic Ocean with some ridging building over the eastern U. Late in the week the next upper level trough moves into the eastern U. Meanwhile at the surface, high pressure over the eastern U.
/DL/ Surface ridging currently extends across the region, with clear and dry conditions areawide. /DL/ Prior discussion below: Quiet weather will continue across the region as high pressure resides at the surface and surface ridging moves in through the course of today. While we start the day chilly, we will warm into the mid/upper 50s in the Golden Triangle to the lower 60s across the rest of the area. /28/ On Wednesday, an upper/midlvl ridge will persist in the southeastern region, keeping ArkLaMiss cool and dry.
1124 AM CST Tue Nov 23 2021 A quiet weather pattern will continue through the short term as upper level ridging remains in place across the western US. An approaching trough on Wednesday will push a cooler airmass into the region on Wednesday. While cooler temperatures are expected with this trough, precipitation is not expected and conditions will remain dry through Wednesday.