Aikyam-Lab/Synoptic-Bench huggingface dataset:
653 AM EDT Sat Nov 4 2017 A warm front will lift northwards today. A strong cold front will bring the potential for severe weather Sunday evening into Sunday night. Although temperatures are starting out in the 30s and 40s this morning, temperatures are expected to climb into the upper 50s to upper 60s across the region today as a warm front lifts northward. Went close to guidance for high temperatures on Sunday with highs in the lower 70s to upper 70s. Thunderstorms in advance of a cold front will begin to push into the region at the very end of the short term period.
However, a stream of high clouds looks likely in moist southwest flow aloft and this may knock a few degrees off and have forecast most highs in the low 80s, which falls a bit short of records. The other thing the high clouds may do is to some extent limit vertical mixing and therefore keep wind speeds and gusts a bit in check. A cold front will move into NE parts of the area late in the afternoon and places like Perryton and Beaver could feel the chill late in the day.
Widespread cloud cover and the increasing dewpoints should prevent temperatures from falling below freezing.
Despite the cloud cover, highs will be warmer today and slightly above normal for early November. Scattered convection is possible mainly late tonight across northeast MO and west central IL along and north of a weak warm front that will develop across central MO.
High pressure over the great lakes will move on to the east and a warm front across Tennessee and Arkansas will move north across Indiana Saturday. Low pressure moving from Iowa into the great lakes will pull a cold front south across Indiana late Sunday and Sunday night. Severe storms are possible Late Sunday and Sunday night as the air mass ahead of the cold front will be quite unstable.
1149 PM MDT Fri Nov 3 2017 The southwest flow aloft over our region is expected to moisten beginning Saturday with that moisture from the eastern Pacific likely to start producing snow in earnest at some of the higher mountain elevations by Saturday evening with rain at lower elevations.
The lower clouds, drizzle, and fog will dissipate through the late afternoon hours for some sun and warm and humid conditions. The clouds plus high moisture content are keeping temperatures up in the low to mid 70s so far this morning. While a slight drop is expected through dawn, expect some areas could tie or break high minimums that are in the low 70s. Record highs may not be challenged today (records in the low 90s) but will likely be very close on Sunday (records in the upper 80s).
328 AM CDT Sat Nov 4 2017 Snowfall north of North Dakota Highway 200 with a mix of freezing drizzle and snow to the south ending from west to east late this morning and through the afternoon highlights the short term forecast. Generally south of North Dakota Highway 200, wavering levels of ice crystals in the column will continue to support the threat for light freezing drizzle at times mixing with snow this morning, possibly lingering into the afternoon across the James River Valley. Will continue to monitor the potential for an expansion of the Winter Weather Advisory into the James River Valley for possible freezing drizzle impacts.
With lower stratus in place, could also see the typical late fall bouts of dense fog for the higher terrain spots as stratus scrapes the ridges. As discussed yesterday, faster arrival of a cold front and associated cooling aloft looks to spoil what could have been a much warmer day locally with highs mainly in the 40s early but falling through the afternoon. Not a whole lot to talk about through the coming work week, as the overall flow remains dominated by some degree of upper troughing across the region (opinions may vary among guidance).
356 AM CDT Sat Nov 4 2017 Upper level trough moving across the area was producing a band of showers which was currently mainly along and east of the MS River. Temperatures were in the lower to mid 40s. Today: Showers will exit the cwa this morning but low stratus will remain all day, as a strengthening inversion at about 850 mb traps the low level moisture. Tonight: Strong inversion will trap the low level moisture with low stratus and areas of fog and patchy drizzle expected. This will be ahead of a cold front approaching from the northwest. Lows will range from the lower 40s to the lower 50s. Trends continue for cooler on Sunday with diminishing threat of storms and heavier precipitation. Highs mostly in the lower to mid 50s all but far SE sections near front.
610 AM EDT Sat Nov 4 2017 A diffuse cold front will extend through the forecast area today into tonight.
451 AM EDT Sat Nov 4 2017 Strong high pressure will build to the north today.
1125 PM MDT Mon May 29 2017 Latest water vapor imagery shows a stalled out upper low over the Great Lakes area. Ridge of high pressure extends from northern Arizona, through Nevada, up into Idaho and eventually up into British Columbia this afternoon. CWFA under northerly flow on the east side of this ridge. Surface analysis showing a weak cold front extending out of the Great Lakes low extending southwestward into northern Kansas and eventually into the western nebraska Panhandle. Did get a few spits of rain outside a few minutes ago here at the office, so will continue the low chance PoPs we have going for this afternoon. We stay in this pattern as upper low over the Great Lakes barely moves through Tuesday.
302 AM CDT Tue May 30 2017 A large upper level low continues to spin over Ontario with a vort lobe rotating through our northeastern CWA this morning.
1109 PM MDT Mon May 29 2017 Generally dry and warm on this Memorial Day as high pressure remains overhead with some spotty showers popping up over the northern mountains. The next Pacific trough will begin to dig inland Tuesday evening which will shift the ridge of high pressure east and allow additional moisture to stream into the region.
Mid/upper level low continues to be anchored over southeast Ontario. In addition, there is a weak mid level trough over the southern High Plains. Area will continue to be under the influence of mid/upper level trough/cyclonic flow aloft.
327 AM EDT Tue May 30 2017 Weak surface ridging should keep conditions dry today.
152 AM EDT Tue May 30 2017 High pressure will persist offshore through tonight. A weak cold front will gradually move into the area midweek. Atlantic high pressure will extend west over the region late week into the upcoming weekend. At the surface, a weak cold front will be just to our north and slowly trending southward.
1221 AM CDT Tue May 30 2017 Northwest flow prevailing this afternoon after a weak cold front moved through the region earlier this morning. Off to our northwest, a ridge of high pressure stretching from the northern High Plains will continue to extend southeast into the lower Missouri Vally overnight, yielding dry conditions and mostly clear skies through the evening and early overnight hours.
1055 PM PDT Mon May 29 2017 High pressure continues over the Inland Northwest through Tuesday with another very warm day. There is a small chance of thunderstorms in the higher elevations, otherwise expect dry weather. A strong cold front will arrive Tuesday night with strong gusty winds and a good chance of showers and thunderstorms.
A ridge of high pressure and its associated axis will be situated over the northern Rockies for the next couple of days.
Upper ridge extending from the Canadian Rockies into the Great Basin will slowly move east over the next few days. Canadian high pressure will be over Eastern Montana and Saskatchewan today with dry weather and clear skies.
628 AM EDT Tue May 30 2017 The very broad upper level trough will continue to impact southeastern Michigan throughout the taf period as it is stalled over Ontario. Despite still residing under the H500 cold pool associated with the upper low, H925/H850 temps will be running about 5 degrees C cooler. Breezy conditions will redevelop this afternoon with surface tight pressure gradient maintained by low pressure over Northern Ontario and high pressure over the southeast states supporting gusts 25 to 30 mph. Temperatures will run a little cooler today given the cooler thermal profiles, with highs in the low to mid 70s.
The highest rain chances today will be during the next few hours as an area with a slightly deeper moist layer migrates through the Keys.
Temperatures will remain warm for the next couple days as a low pressure system approaches and streams will continue to run high.
330 AM MDT Tue May 30 2017 Broad upper low continues to spin just south of the Hudson Bay with cyclonic flow over the Great Lakes/Midwest. and northwest flow on the backside of the low across the Dakotas. A high amplitude ridge sits across the western CONUS ahead of the next incoming trough.
200 AM EDT Tue May 30 2017 A weak cold front will push east across the area tonight.
The broad upper troughing will continue with h5 temperature near -11 C.
319 AM MDT Tue May 30 2017 Another day of very warm daytime temperatures is forecast today for the Northern Rockies under high pressure.
NW flow slowly shifts east of the area early Wed, with gradually increasing mid level heights and a return to warmer southerly flow for Wed through Fri. This return moist flow will lead to increasing chances of showers and thunderstorms first on Wed, as a warm front will be located across Central KS for Wed afternoon and Wed evening. Could see a lull in the showers for most of Thu, as the warm advection pushes the warm front well northeast of the area. A cold front looks to drift south into Central KS for early Sat, with the front lingering across the area for Sat.
107 AM EDT Tue May 30 2017 An unsettled weather pattern will continue through the week as a series of cold fronts affect the region. With the most of the moisture confined to the east of the region, in the proximity of the low-level convergence, expect more widespread activity to remain near the ridges, eastward.
Cutoff low pressure aloft will loiter over the Great Lakes through the short term period. Temperatures will climb into the low 50s north to the upper 50s south. Depending on where the holes in the clouds develop, some spots may jump into the low 60s, especially from the Brainerd Lakes through Hayward and into the Park Falls area. The last upper level long wave trof works its way across the forecast area Tuesday night. This means some POPs in the evening, ending overnight as the trof departs.
324 AM PDT Tue May 30 2017 A trough of low pressure will continue across California through mid week.
155 AM EDT Tue May 30 2017 An unsettled weather pattern will continue through the week as a series of cold fronts affect the region. With the most of the moisture confined to the east of the region, in the proximity of the low-level convergence, expect more widespread activity to remain near the ridges, eastward.
High pressure ridge axis remains just south of the area and will promote a light offshore flow this morning turning onshore in a sea breeze by afternoon along the coast.
236 AM CDT Tue May 30 2017 Upper low continues to spin just north of Lake Superior this morning, with several waves rotating southeastward toward the Great Lakes region. With cooler air aloft now in place, highs should largely be in the mid-upper 70s vs.
Despite still residing under the H500 cold pool associated with the upper low, H925/H850 temps will be running about 5 degrees C cooler. Breezy conditions will redevelop this afternoon with surface tight pressure gradient maintained by low pressure over Northern Ontario and high pressure over the southeast states supporting gusts 25 to 30 mph. Temperatures will run a little cooler today given the cooler thermal profiles, with highs in the low to mid 70s.
527 AM CDT Tue May 30 2017 Upper low continues to spin just north of Lake Superior this morning, with several waves rotating southeastward toward the Great Lakes region. With cooler air aloft now in place, highs should largely be in the mid-upper 70s vs.
A few vorticity maximums will move across central and srn WI this afternoon and tonight as they rotate around the large low pressure area over nrn Ontario, Canada. Temps will be several degrees cooler than yesterday with 1000-500 mb thicknesses only from 546-549 DM.
525 AM EDT Tue May 30 2017 High pressure over the Canadian Maritimes will slowly move east today while a weakening occluded front approaches from the west tonight.
405 AM EDT Tue May 30 2017 Early this morning the region was under the influence of trough extending south into the MS valley region from a closed low over Ontario.
Temperatures generally in the lower and middle 70s with dew points around 70.
342 AM CDT Tue May 30 2017 An upper level low is spinning over Ontario, Canada.
West to southwest flow at and below 1 kft noted in the low levels per VWP from KVAX and KJAX with sfc ridging noted across central FL to the wern Atlantic.
An upper trough of low pressure will maintain the persistent marine influence along the coast while providing clouds and isolated showers and cooler temperatures to much of NW CA for the next few days. Pictures from space showing mid and high level clouds in advance of an approaching upper level trough.
415 AM EDT Tue May 30 2017 An unsettled weather pattern will continue through the week as a series of cold fronts affect the region. With most of the moisture confined to the east of my FA, in the proximity of the area of convergence, expect more widespread activity to east of the ridges. Will include PoPs across mainly the ridge counties today, due to the rapid atmospheric destabilization in an area of increasing surface dewpoints.
359 AM EDT Tue May 30 2017 High pressure over the Canadian Maritimes will slowly move east today while a weakening occluded front approaches from the west tonight.
Have held onto slight chance pops through most of the night with sfc trof dropping ese thru the FA. This should help keep us mainly dry through the daytime period and slightly cooler with highs ranging from the lower 70s northwest to the upper 70s in the far southeast. Additional short wave energy rotating around an upper level low over the northern Great Lakes will work across our area Tuesday night. However, moisture is still somewhat limited so will keep pops in the lower chance category.
Surface analysis this morning places a quasi- stationary boundary across portions of Northern Alabama and North Mississippi and a weak cold front over portions of Southern Missouri and Southern Illinois. A weak cold front is expected to gradually drop into portions of Northeast Arkansas and West Tennessee this afternoon into tonight.
Upper heights rise slightly as the western ridge nudges into the Rockies.
H700mb temperatures rise above 0C and into the lower single digits supporting the temperature forecast.
Cool/humid airmass circulating around a broad low to the east will dominate conditions in the northeast and western Minnesota tonight, however in our west, we see a ridge of high pressure nosing down out of Canada. Not the best setup for ideal radiation conditions as we maintain light northerly flow through early Tuesday, but with the cool start, dewpoints in the low 30s, a relaxing gradient, and loss of diabatically driven cumulus - anticipate temperatures will crash overnight/early Tuesday particularly across north central/northwest counties. The high continues to build across the region Tuesday, though the influence of the upper low will persist across our far east into western Minnesota with more diabatically driven cumulus, some light sprinkles and late morning gusty winds.
400 AM CDT Tue May 30 2017 WV imagery shows a dirty upper ridge over the western CONUS, and more or less zonal flow over West Texas and Southeast New Mexico. Further west, a trough runs the length of the west coast, sending sending impulses across the Baja peninsula and into the region. Over the next 48 hours, a reinforcing trough out of the nrn Pacific is forecast to dig down the west coast, further reinforcing the one already in place and nudging the ridge eastward.
207 AM CDT Tue May 30 2017 Scattered convective showers continue making their way across our southern counties this early morning, influenced by pinwheel of energy around base of mean long wave trof. That is just enough to tap the couple hundred J/KG MU CAPE in the lowest 1 KM to set off this pocket of showers/embedded isolated storms. Another pinwheel of energy will be occurring then, around the base of the mean upper long wave trof, and combined with the differential heating of the pm hours, will be assisted with 0-1KM MU CAPES in the 1000-2000 J/KG range.
1006 PM PDT Mon May 29 2017 A trough of low pressure aloft will deepen across California mid week, before gradually shifting east of the region late in the week. A weak upper level trough of low pressure combined with strengthening onshore flow and an eddy circulation will help to deepen the marine layer to around 2000 feet by tomorrow morning. High temperatures on Tuesday are expected to be slightly cooler across most areas. As the trough starts to move east on Tuesday, another broader trough circulation will move in.
1134 PM PDT Mon May 29 2017 A trough of low pressure aloft will deepen across California mid week, before gradually shifting east of the region late in the week. A weak upper level trough of low pressure combined with strengthening onshore flow and an eddy circulation will help to deepen the marine layer to around 2000 feet by tomorrow morning. High temperatures on Tuesday are expected to be slightly cooler across most areas. As the trough starts to move east on Tuesday, another broader trough circulation will move in.
/issued 359 PM EDT Mon May 29 2017/ Today into Tuesday, upper level ridge still remains over the region keeping mostly dry conditions across South Florida.
227 AM PDT Tue May 30 2017 High pressure will give way to a series of weak low pressure systems moving through the region during the next couple of days.
648 AM EDT Tue May 30 2017 Weak surface ridging should keep conditions dry today.
342 AM MDT Tue May 30 2017 Looking like a bit less convection today as the environment is a little warmer and drier.
228 AM MDT Tue May 30 2017 Limited mid level moisture under a weak upper ridge is still expected to drift northward into our CWA today with a few late day showers and thunderstorms mainly over the mountains.
314 AM PDT Tue May 30 2017 A trough of low pressure will continue across California through mid week.
319 AM MDT Tue May 30 2017 Broad upper low continues to spin just south of the Hudson Bay with cyclonic flow over the Great Lakes/Midwest. and northwest flow on the backside of the low across the Dakotas. A high amplitude ridge sits across the western CONUS ahead of the next incoming trough.
Strong upper high continues over the west with dry weather, chilly nights, and mild days. Afternoon temps running from 0 to 7 degrees warmer than 24 hours ago.
The strong and persistent high pressure aloft will remain the dominant weather feature across the western states through at least the middle of this week.
927 PM EST Sun Dec 10 2017 High pressure will remain across the area through Monday.
407 PM MST Sun Dec 10 2017 Visible satellite imagery shows clear skies over all of eastern Utah and western Colorado as the region sits on the eastern periphery of a sprawling ridge of high pressure over the Great Basin.
In the low levels of the atmosphere, an area of high pressure will be centered over South Texas overnight. In the mid to upper levels of the atmosphere, a trough of low pressure will be located over the Florida peninsula tonight.
624 PM EST Sun Dec 10 2017 High pressure will remain across the area through Monday.
Light precipitation in the wake of the main snow band and outside of any areas of convection could fall as freezing drizzle as mid-level moisture gets stripped out by the incoming dry slot. Warm advection ahead of the low will bring snow into the area late tonight and during the day on Monday, with the majority of the snow falling between midnight and noon. Highs on Monday should be in the lower 20s to lower 30s. Monday Night Through Sunday High amplitude flow with a strong ridge over the western Conus and deep cold trough over the eastern states will keep the forecast area in the cold northwest flow regime this week, resulting in a series of clipper type systems passing over.
Winds will increase on Monday and a dry cold front will bring a wind shift to northern terminals by Monday afternoon.
Cold advection in the low levels pretty good Monday 12-15z into the nrn/cntrl RRV. One half inch to one inch of snowfall accumulation is possible across eastern North Dakota as a cold front brings strong winds and snow chances overnight. Recent NAM guidance suggests low level temperatures will warm to just above freezing this evening before midnight in the Devils Lake - Valley City region.
639 PM EST Sun Dec 10 2017 High pressure will build south of the region tonight and Monday.
The dominant pattern of an upstream amplified ridge will persist, and will maintain the downstream trough over the Great Lakes region through the bulk of the extended periods. Closer to Thur/Fri, ensembles do begin to indicate the ridge beginning to relax marginally; however, guidance continues the theme of quick clippers skirting the Upper Midwest/Great Lakes. likely warming into the low/mid teens by late Tue aftn. Tue ngt-Sat: Troughing will finally begin to lift/pivot east, allowing mid-lvl heights to rise and create more of a diffluent/dry flow aloft. Synoptic snow will move in late tonight into Mon morning producing a period of IFR conditons ahead of a low pressure system. Behind the low, more lake effect snow kicks in late Mon afternoon impacting the western TAF sites with more IFR conditions.
Have refined the low temps to adjust favored valley locations colder tonight. For Monday, a cold front will bring slight cooling to the plains, with temperatures a few degrees cooler than those observed today. ridge is forecast to hold its position to the west of us all week long. By the end of the week the ridge axis will retrograde from a position over Nevada and Idaho to a position over the West Coast.
944 PM EST Sun Dec 10 2017 High pressure will build south of the region tonight and Monday.
517 PM CST Sun Dec 10 2017 Vigorous upper level low spinning off the Baja Coast has plentiful high clouds associated with it streaming across Mexico and the Texas Hill Country. Some of this is trying to move into our southwest zones this afternoon/evening and as this low moves closer to the Baja Region during the day Monday, this cirrus should move into more of our airspace throughout the day. Looking aloft, amplified UA ridging across the western CONUS and UA troughing across the northeast CONUS had led to dry northwest flow dominating across the heart of the country. Sfc winds maintaining a downslope wind component tonight will lead to a warmer night than previous nights /30s/.
532 PM CST Sun Dec 10 2017 The next dry cold frontal passage can be expected Monday as the overall weather pattern remains generally unchanged. A dry cold front will increase and then veer winds from the southwest to the northwest late in the taf period.
Chattanooga Airport, TN 32 53 36 44 / 0 0 10 10 Knoxville McGhee Tyson Airport, TN 30 50 34 38 / 0 0 10 20 Oak Ridge, TN 29 51 35 38 / 0 0 20 20 Tri Cities Airport, TN 23 50 32 36 / 0 0 20 40.
840 PM EST Sun Dec 10 2017 High pressure builds over the Gulf coast region through Monday night, as low pressure moves through the northern tier of the nation.
Main emphasis tonight will be for the long durations of below freezing temps. Up to to 10 hours of below freezing temps expected for the Suwannee Valley and up to 6 to 8 hours elsewhere away from the coast.
612 PM EST Sun Dec 10 2017 Cold and dry high pressure will be over the region through Monday night with temperatures well below normal.