Aikyam-Lab/Synoptic-Bench huggingface dataset:
The timing of the cold front and associated wintry precipitation remains largely unchanged. Forecast soundings suggest that the precipitation will begin as all rain, with freezing drizzle possible initially given the dry air aloft. Precipitation should quickly transition to a mix of sleet/freezing drizzle, and eventually to snow, as the entire profile becomes saturated and cools below freezing. We think the onset of freezing precipitation should begin by late morning through early afternoon across northeast Oklahoma, mid afternoon across northwest Arkansas, and late afternoon for areas in western Arkansas through far southeast Oklahoma. It just takes a little freezing drizzle to create slippery driving conditions, and flash freezing is definitely a concern given the shallow cold air mass.
642 AM EDT Tue Aug 1 2017 High pressure will keep the weather mainly fair but with slowly increasing humidity through mid week.
317 AM CDT Tue Aug 1 2017 A weak cold front is draped across the forecast area from near Pierre to Sisseton.
132 AM EDT Tue Aug 1 2017 High pressure will keep the weather mainly fair but with slowly increasing humidity through mid week.
400 AM MDT Tue Aug 1 2017 An upper level high will be cnetered over the Great Basin with NNW flow aloft across the area. Precipitable water values have continued to drop fm 24 hours ago so expect tstm coverage this aftn to be even less than yesterday with only isold storms over the higher terrain. As for highs 850-700 mb temps do not change much however would expect readings to be a degree or two warmer than yesterday. Throughout the forecast period, the upper level pattern is forecast to feature an upper ridge over the western United States with moderate northwest flow across Colorado. Further to the north, a series of short wave troughs will be dropping out of Canada and over the northern plains region.
336 AM MDT Tue Aug 1 2017 Strong upper ridging remains centered across the Great Basin region with northwest flow across the northern plains. Surface flow will become more southeasterly today as the high pressure moves east of the CWA. but the higher likelihood will be strong winds with the storms with DCAPE over 1200.
Dry northeasterly flow will persist across our area through tomorrow morning, with surface dewpoints generally in the lower 60s across our area. Another generally dry day is in store Tuesday (with the exception of the FL Big Bend area as the Atlantic seabreeze may spark a few showers in the afternoon) with low PWATs and overall subsidence in the low and mid atmosphere.
554 AM EDT Tue Aug 1 2017 High pressure anchored over the Ohio valley will maintain a favorable influence over the SE Michigan airspace through the period. Meanwhile, moisture pool/axis seen in the 850-700 MB Theta-E fields which triggered activity yesterday in and around Saginaw Bay seen lifting northeast through northern Thumb region, and much of southeast Michigan looks to be in Theta-E trough for majority of the day. Still looking a weak cold front drifting through southeast Michigan during Wednesday, with sheared out upper level PV providing some upper level support.
323 AM EDT Tue Aug 1 2017 High pressure over the Great Lakes builds southeast and will become centered over the Mid Atlantic through Wednesday.
331 AM PDT Tue Aug 1 2017 Upper level ridge will build in over the region through the week with above normal temperatures expected.
301 AM EDT Tue Aug 1 2017 Weak high pressure will build over the region today and will shift east tonight. A cold front will slow as it approaches from the northwest on Wednesday and will stall over southern Quebec Wednesday night.
By Wednesday an upper level low is developing in the northern Plains and a cold front is developing across the Dakotas.
Tuesday will be several degrees warmer and mainly dry. Stratus clouds will gradually lift and erode during the course of the day, allowing for more sunshine and subsequently afternoon temperatures in the lower 80s. Lows Wednesday morning in the lower 60s. Dry and noticeably warmer. Ridging aloft will temporarily strengthen, with a wedge of warmer air invading the plains ahead of an advancing cold front. With prefrontal compression, suspect the usual suspects on the lower elevations in the SE zones will reach at least the lower 90s.
Expecting storms to be of the pop and drop variety today with not much to sustain them as they drift off the higher terrain into the adjacent valleys on the southern slopes due to a northerly upper level flow. This is all thanks to a building ridge of high pressure sitting to the west over the Great Basin. Tuesday will be much of the same although a bit drier as drier air continues to infiltrate from the north with high pressure to the west.
528 AM EDT Tue Aug 1 2017 High pressure to the north will keep the weather dry and seasonable today and Wednesday.
There's a shift in the location of the persistent upper-level ridge axis farther to the west and into the gulf of Alaska. This places Northeast Montana on the downslope side of the ridge for northwest flow aloft. This pattern has been dry for us, but there is a strong, embedded wave in the upper flow that will send a more distinct cold front through our area today and this evening. However, the cooler air with the front will lower temperatures to close to normal today. This cooler air may mitigate the severe threat, however.
hot and dry conditions to dominant for a couple of days before a new trough begins to move onshore from the west. High pressure remains across the desert southwest.
327 AM CDT Tue Aug 1 2017 The dry and unseasonably weather from the weekend has been replaced with a warmer and more humid air mass over the past 24 hours. Very weak ribbons of energy passing through the persistent upper level trough over the eastern U.
311 AM MDT Tue Aug 1 2017 Strong high pressure system is now in control of the western CONUS with active northwest flow expected to remain overhead through mid- week. Expect with mainly light rain and gusty winds, but models do hint at some higher moisture along the Pine Ridge, and combined with bulk shear around 40 kts, cannot rule out a stronger storm producing hail in this area. The wave is progged to move overhead on Wednesday, dragging a cold front south across the forecast area as well. Not overly confident whether storms will sustain for long in a cooler and more stable post-frontal airmass across the plains, but some may forced along the 700 mb front in the evening and overnight, and frontogenesis during this time looks to be a forcing mechanism as well.
Tuesday will be several degrees warmer and mainly dry. Stratus clouds will gradually lift and erode during the course of the day, allowing for more sunshine and subsequently afternoon temperatures in the lower 80s. Lows Wednesday morning in the lower 60s.
218 AM PDT Tue Aug 1 2017 Intensifying high pressure will bring hot to record-breaking temperatures to northeast California and western Nevada this week. As high pressure shifts east late this week, more moisture is forecast to surge northward with increasing thunderstorm coverage. High pressure amplifies over the Sierra and western Nevada this week to bring very hot and dry conditions. The well-advertised high pressure has made its presence known with the max temperature at the Reno airport of 101 degrees already yesterday.
204 AM EDT Tue Aug 1 2017 Patchy fog will gradually erode during the mid to late morning hours, revealing plentiful sunshine and above normal temperatures under high pressure on Tuesday. High pressure and warmer temperatures continue into Wednesday along with the threat for an isolated shower or thunderstorm, mainly across southern areas. Expect fog to erode under building high pressure and plentiful sunshine. A surface cold front will be still be slowly working its way through southern Vermont, so a few additional isolated showers or storms are possible, but for most areas it should be a sunny and dry day with temps again above normal in the mid 80s.
247 AM CDT Tue Aug 1 2017 Another quiet morning across Middle TN is upon us, though the transition from northwesterly flow aloft to more of a troughy pattern across the eastern CONUS is underway.
643 AM EDT Tue Aug 1 2017 Aviation A weak area of high pressure over the Central Appalachians will draw up increasing amounts of moisture into the region today through Wednesday The atmosphere will become warm and unstable.
Ascent will continue to spread south-southeastward as the trough pass by today.
High pressure will be shifting east of the region today. Highs today may be just a bit cooler than yesterday with more clouds streaming across the region, but look to still top out in the mid to upper 80s.
535 AM EDT Tue Aug 1 2017 High pressure will keep the weather mainly fair but with slowly increasing humidity through mid week.
They are not affecting temperatures much, as they have dropped in those locations into the low to mid 70s. They also show this high cloudiness developing southward in western Tennessee this evening and then moving it into northern Alabama after midnight. This should help to keep lows maybe a degree or so warmer (in the mid to upper 60s) than previously thought. As mentioned, the upper-ridge will slide off to the west, allowing for a fairly weak upper-level trough to drop southeast into the region on Tuesday. This broad upper-trough will gradually sit over the lower-Ohio and Tennessee Valley by Wednesday, and drag a weak front toward the doorstep of the area.
147 AM EDT Tue Aug 1 2017 High pressure through Tuesday.
229 AM EDT Tue Aug 1 2017 High pressure to the north will keep the weather dry and seasonable today and Wednesday.
With this, many locations should dip down into the low 60s - values that haven't been reached since mid to late June. /Issued 251 PM EDT Mon Jul 31 2017/ Another mild night in store for north and central Georgia as dry high pressure continues to be the main influence over the region. General troughiness aloft over the mid U.
323 AM CDT Tue Aug 1 2017 High pressure continues to dominate our weather at the surface with an upper level ridge over the western US providing northwesterly flow aloft. Highs today will be in the mid 80s, with the slightly warmer temperatures across northern MO where there won't be as much cloud cover. The low both at the lower and upper levels should track east across the northern Midwest, strengthening as it does.
CAPES supportive of strong storms will be from Harlowton to KBIL to SE MT, with the highest CAPES in the E. The low-level jet returns at 06Z, then is gone again by 12Z Wednesday. Also another cold front will drop down tonight through the area, enhancing lift. However, the high precipitable waters will add a heavy rain threat as well, especially over the E. Wednesday continued to look much cooler with highs in the 70s. Models are still showing a consistent northwest flow pattern setting up with a ridge along the West Coast and a trough over the central US. Even with the cooler temperatures, conditions will still be dry with relative humidities still dropping into the teens by late in the weekend.
High pressure will continue hot and dry conditions over western Montana and central Idaho today. A backdoor cold front is still expected to bring a shift in winds to a northeasterly/easterly direction early this evening across northwest Montana and into the rest of western Montana and central Idaho by Wednesday morning. However, the front will bring in cooler temperatures and increase moisture over night. By Wednesday, the Canadian cold front will be draped across the region, with cooler temperatures mainly experienced across western Montana.
With drier air, valleys across northern portions of the area should see a cooler night then the past several with Leadville dropping into the upper 30s. Elsewhere, not much change though from the past few days, though perhaps a degree or two cooler with less cloud cover. Upper high persists across the Desert Southwest and Great Basin, with continued drier air moving into the region within northerly flow aloft. The best coverage will be over and near the higher terrain, with the more northerly steering flow aloft keeping most storms west of the I-25 corridor.
344 AM EDT Tue Aug 1 2017 High pressure initially across the Ohio Valley today will shift east for Wednesday.
343 AM EDT Tue Aug 1 2017 Canadian high pressure will build across the region today then move east Wednesday. A cold front from central Canada will move toward the Saint Lawrence valley Wednesday night and then stall there through the late week. A weakening cold front is slowly movg S thru N cntrl ptns of the Rgn very erly this morn, with the front xpctd to get as far S as E Cntrl or interior Downeast areas by midday before slowly dissipating this aftn. This will allow drier dwpt air to get into the N hlf of the Rgn under sunny skies slightly cooler hi temps aft erly morn patchy fog.
230 AM PDT Tue Aug 1 2017 August will begin with much warmer than average temperatures.
631 AM EDT Tue Aug 1 2017 Canadian high pressure will build across the region today then move east Wednesday. A cold front from central Canada will move toward the Saint Lawrence valley Wednesday night and then stall there through the late week. 615 AM Update: The current psn of the cold front is between Houlton and Millinocket. Orgnl Disc: A weakening cold front is slowly movg S thru N cntrl ptns of the Rgn very erly this morn, with the front xpctd to get as far S as E Cntrl or interior Downeast areas by midday before slowly dissipating this aftn. This will allow drier dwpt air to get into the N hlf of the Rgn under sunny skies slightly cooler hi temps aft erly morn patchy fog.
516 AM CDT Tue Aug 1 2017 (Today and Tonight) Strong mid/upper level high pressure will remain centered over the Great Basin through tonight, with an upper level trough situated across the eastern CONUS. Will continue with higher rain chances through tonight, along with cooler temperatures area-wide today due to increased cloud cover.
128 AM EDT Tue Aug 1 2017 High pressure to the north will keep the weather dry and seasonable.
649 AM EDT Tue Aug 1 2017 High pressure over the Great Lakes builds southeast and will become centered over the Mid Atlantic through Wednesday.
In the low levels the NAM12 is consistent too, depicting that the MCS will feed into the mstr flux maxima/theta-e ridge which favors core of MCS slowly propagating from Lea-Gaines into Winkler Co. Supportive of this is difluent 85h-3h thickness indicating some back-building potential? A lesser 2nd round of storms will be possible late Tue PM when the main mid level trof axis within nw flow aloft moves thru. Deeper mid level drying in wake of theta-e ridge continues to favor Wed PM-Thur PM as down days.
Upper high will remain centered far southeast Oregon and northwest Nevada through Wednesday. Moisture that has worked northward under the ridge will bring increased cloud cover and a slight chance of afternoon/ evening showers and thunderstorms to southern Harney, Malheur, and Owyhee counties.
207 AM EDT Tue Aug 1 2017 High pressure will remain in place through Wednesday, but with a weak low pressure trough developing inland each afternoon. The high will linger into late week, with a cold front approaching for the weekend.
420 AM EDT Tue Aug 1 2017 Currently - Tropical Depression Emily, and an associated trough, is draped across central Florida. This along with a surface through lower level ridge across Cuba has placed the Florida Keys region in a zone of lower level confluent flow. In turn the surface through lower level ridge will shift northwards. Over the next couple of days, the previously mentioned ridge axis will shift further northwards into the Florida Peninsula.
A weak cold front was draped from northwest Minnesota through far northwest South Dakota into southern Montana. Temperatures ranged in the low to mid 60s throughout western Nebraska.
1232 AM CDT Tue Aug 1 2017 The cold front extended from southeastern Montana, across Bowman County in ND, over north central SD, then extended back north into the southeast corner of ND, across northern Minnesota to a low in northwestern Ontario. Forecast concerns this period focus on the thunderstorms and severe weather threat associated with a cold front moving through central North Dakota late this afternoon. This will also usher in much cooler air for the remainder of the week.
458 AM CDT Tue Aug 1 2017 Quiet weather pattern as high pressure over the central US controls the weather pattern this morning. Mrng lows xpcd into the mid 70s which will be about three to five degrees cooler than last week.
358 AM CDT Tue Aug 1 2017 Upper ridge centered over the Great Basin this morning with a trough swinging across the Central Plains today and down across the Gulf states tonight. As a second trough deepens over the Eastern US later in the week the center of the ridge will drift west.
306 AM EDT Tue Aug 1 2017 High pressure will be shifting east of the region today. Highs today may be just a bit cooler than yesterday with more clouds streaming across the region, but look to still top out in the mid to upper 80s.
The pattern will consist of an amplifying ridge across the West Coast and a series of low pressure systems moving southward through northwest flow aloft. The first short wave trough and weak cold front will move southward across the Central Plains this morning and interact with increasing low and mid level moisture to produce scattered showers. Precipitation chances will decrease from northwest to southeast Wednesday afternoon/night as brief subsidence moves in behind the departing upper trough.
245 AM CDT Tue Aug 1 2017 256 PM CDT Quiet conditions will continue tonight with slightly milder temperatures, in the low-mid 60s outside of Chicago and upper 60s in the city. On Tuesday, expecting fairly similar conditions to today except a bit more humidity (60s dew points area wide) and temperatures perhaps a degree or two warmer in some spots away from immediate lake shore, along with a bit more cloud cover. Castro 233 PM CDT The days of quiet weather will come to an end for a brief time mid to late week before we transition to a cooler period this weekend. High surface pressure in wake of the Canadian upper low will steer a weak leading cold front southward from Wisconsin during the day.
617 AM EDT Tue Aug 1 2017 Weak high pressure will build over the region today and will shift east tonight. A cold front will slow as it approaches from the northwest on Wednesday and will stall over southern Quebec Wednesday night.
221 AM EDT Tue Aug 1 2017 High pressure and dry air will remain in control of the region through the middle of the week.
A cold front dropping in from the north will bring a slight chance of storms to parts of southern Wisconsin later tonight.
142 AM EDT Tue Aug 1 2017 High pressure will remain across the Great Lakes and Ohio Valley through Tuesday.
210 AM EDT Tue Aug 1 2017 High pressure will extend into the Mid-Atlantic through the middle of the week.
The latest model runs this afternoon really are quite dismal in terms of any substantial precipitation with the passage of this trough this evening and Sunday given how dry the lower levels of the atmosphere are and that the brunt of upper level support will be deflected well to our south as this system splits. Daytime highs Sunday will be a few degrees cooler under a slightly colder airmass and overnight lows will remain on the chilly side and be closer to seasonal norms.
652 PM EST Sat Dec 16 2017 High pressure will build into the region tonight and Sunday. Cooler weather returns again late in the week as Canadian high pressure builds southeast into the region. A weak wave in the westerly 500 MB flow aloft pushes into the ridge late Sunday night, and will bring clouds across the CWA overnight.
light erly flow prevailed between high psressure over nrn Ontario and a trough and front from the cntrl plains through the srn Great Lakes. With marginal moisture to -10C for ice nuclei, freezing drizzle will also be possible from near MNM to ESC. Pcpn associated with a shortwav trough moving through nrn Ontario, will remain north of the cwa.
737 PM EST Sat Dec 16 2017 High pressure will build in overnight, ending the few remaining evening flurries, and keeping our weather quiet into Sunday.
538 PM CST Sat Dec 16 2017 A sunny and pleasant day across central and southeast IL with breezy sw winds 10-20 mph and gusts of 20-25 mph giving milder temps in the low to mid 50s, even upper 50s from Springfield and Jacksonville sw. 1025 mb high pressure over GA and sprawled across the southeast states while a cold front extended from central IA thru nw KS to deepening 1000 mb low pressure over se CO. Low pressure is forecast to weaken as it ejects into the central plains by dawn Sunday and eject ne over nw IL by Sunday afternoon. Highs in the low to mid 40s Sunday with ssw winds 5-10 mph, temperature rise held back by overcast skies and light rain.
944 PM EST Sat Dec 16 2017 High pressure will build into the region tonight and Sunday. Cooler weather returns again late in the week as Canadian high pressure builds southeast into the region. A weak wave in the westerly 500 MB flow aloft pushes into the ridge late Sunday night, and will bring clouds across the CWA overnight.
543 PM EST Sat Dec 16 2017 High pressure will be over the area through tonight and then shift off the Southeast Coast Sunday.
633 PM MST Sat Dec 16 2017 6pm Update: Upper trough continues over the Rocky Mountain States this evening. Weak upper trough passing through eastern Montana will slowly exit to our east as broad upper ridge builds east. However the ridge will not reach too far into Montana as a strong Pacific jet stream will have a greater influence.
Mainly seasonal temps being observed across the area this afternoon although some lingering clouds have kept northern zones a touch cooler. On Sunday, high pressure shifts east allowing for a more E/SE wind flow to setup across the area allowing temps and moisture to increase. As we enter the medium to long range period, the upper pattern across the CONUS will continue to evolve, favoring broad and strong upper ridging over the Bahamas and southeastern U. and deep troughing over the southwest.
In the low-levels, converging flow in the Western Magic Valley is maintaining lower cloud cover a few light snow showers.
429 PM MST Sat Dec 16 2017 Current surface analysis shows low pressure over northern IA, with cold front well south and east of the area at this time. Drier air at the lower levels to the north and east is helping to keep the rest of the area mainly dry. Light snow will continue into the evening over northeast WY and southwest SD, tapering off overnight from north to south as the trough digs further southwest of the region.
/issued 321 PM CST Sat Dec 16 2017/ (Tonight and Sunday) Patchy rain is occurring this afternoon across our area along with widespread cloud cover, in association with an upper low and trough moving across the Big Bend region. The upper trough will lift out to the northeast across our area early tonight, as an upstream low and trough dive southeast into the northern Baja region. Rain chances will shut off as the aforementioned trough axis swings through. Not that much of a temperature dropoff is anticipated tonight, with overnight lows expected to range from the upper 30s across our western and southern counties, to the lower 40s in the eastern Big Country and Heartland areas. A weak cold frontal boundary should sag south into our far northern counties by late afternoon or early evening.
Any low ceilings that do develop will erode from west to east during the late morning Sunday as a cold front pushes across the TAF sites.
831 PM EST Sat Dec 16 2017 Light environmental flow in proximity to high pressure has already backed to N component early this evening. Strong high pressure will transition toward the Mid-Atlantic Seaboard and then slide offshore the Carolina coast.
608 PM EST Sat Dec 16 2017 High pressure will build across the Southeast U.