Aikyam-Lab/Synoptic-Bench huggingface dataset:
Winds will be southwesterly and 15-20 kts until around 09Z when a cold front will swing winds northerly and gust 35-45 kts. /Issued 424 PM CDT Mon Apr 2 2018/ Strong cold front to push south across the Panhandles late tonight into Tuesday morning. Winds will shift to the north 20 to 35 mph with higher gusts near 50 to 55 mph following the passage of the cold front. Warmer and continued dry conditions expected.
322 AM EDT Tue Apr 3 2018 High pressure is forecast to hold on for one more day, before being pushed eastward by an approaching trough. There is some weak ridging at 500mb as well. By Wednesday, the upper level trough, and a surface cold front will turn the wind more southerly in the morning, then westerly in the afternoon. The associated cold front stretches to the south southwest, from New England , down the eastern seaboard, and across the Florida Panhandle, into the Gulf. However, the high behind the front should be strong enough to push this front through the area, perhaps, just into the Florida Straits.
519 AM EDT Tue Apr 3 2018 Currently - An Atlantic ridge extends across the Florida Peninsula, keeping winds gentle out of the east. Deep layered ridging is in place and there is substantial dry air aloft. Forecast - High pressure to our north will linger today and tonight, then retreat eastwards as a mid latitude low moves into the northeastern United States. the northeastern low will lift out far to the northeast heading past Wednesday, stranding a cold front across the Peninsula.
Onshore flow ahead of an approaching cold front will yield warm temperatures and mostly dry conditions on Tuesday. Expect high temperatures to reach the lower to mid 80s everywhere except for the immediate coast.
Weak short wave in the southern branch of the flow helps to push a fairly strong cold front into the state by tomorrow evening.
Winter-like temperatures will return after Wednesday with highs only in the lower to mid 30s into the weekend. Dewpoints to the north are drier, but northeast flow is not particularly strong and this does not look like a reinforcing setup for sustained freezing rain.
there will be a warmer push ahead of the 850 low that will keep more of a mix or pure rain in the southern cwa. The whole idea of the higher amounts in the northern cwa still looks good with that area more thermally favorable for the longer snow potential. Some steeper low level lapse rates with a bit more moisture in the low levels on the GFS soundings while NAM is drier.
Lows tonight in the low to mid 20s. Another cold front to pass east across CWA during Monday afternoon, and thru southeast IL early Monday evening. GFS and GEM models are stronger with upper level trof over area and has qpf over area on Thu along while Ecmwf is weaker with this trof and dry. Upper level trof lingering over Ohio river valley Fri morning finally appears to pull away from IL for the weekend with moderating temperatures.
Dry and mostly cloudy otherwise tonight with lows into the lower to middle 20s.
311 PM CST Sun Dec 10 2017 High pressure will remain over the Mid South through Monday. The stronger winds combined with dewpoints in the lower 30s and dry fuel moisture levels will lead to elevated fire danger across areas west of the Mississippi River on Monday afternoon. Temperatures will be much warmer with highs in the lower to middle 60s. A cold front will move through the region Monday night.
Concerning RFW conditions, RHs should remain above the 15 percent threshold over western NE thanks to an early arrival of the cold front. Upstream ridge of high pressure will yield northwest flow through the period.
239 PM EST Sun Dec 10 2017 Cold and dry high pressure will be over the region today through Monday night with temperatures well below normal.
Freezing temperatures are expected across the nature coast overnight, with some also sneaking into eastern Pasco. Ridging and the dry air will remain in place for Monday, with highs expected to reach into the lower to mid 60s most locations.
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. Behind that low pressure system, more lake effect kicks in late Mon into mid-week.
Look for an area of light snow to overspread the area with the arrival of this warmer and more moist air. During that potential quiet period in the morning, we could see some light freezing drizzle.
245 PM EST Sun Dec 10 2017 High pressure will build south of the region tonight and Monday.
After a dry and slightly warmer day, the longwave trough that has persisted over the northeast will deepen as a strong jet core enters the backside of the trough.
With the NKX sounding this morning showing 850 MB temps of 16 C, highs will be in the 80s at most locations at lower elevations, including some upper 80s in northern Orange County and some of the lowest valley locations.
Larger scale pattern remains fairly static through the period with ridging dominating the western half of the country and troughing over the east. A couple of decent short waves sweep through the large eastern trough through the upcoming workweek.
308 PM EST Sun Dec 10 2017 High pressure will remain across the area through Monday.
Light northwest surface winds behind departing surface trof will trend to light southwest late this afternoon and early this evening as surface pressure gradient relaxes. Pre-frontal trof and cold front arrive from the northwest Monday morning, causing surface winds to shift to northwest, and then increase into the 15 to 25 kt range toward the end of this forecast. While we will be void of any precip chances, northwest flow aloft will allow for a pair of cold fronts to traverse the Panhandles.
1038 AM MST Sun Dec 10 2017 Upper ridging covers the western CONUS, while a trough persists over the east. Strong upper ridging will result in another warm and dry day today, with highs in the 50s to mid 60s.
341 PM EST Sun Dec 10 2017 High pressure will bring a brief period of fair weather to the Appalachians and central mid Atlantic region to start the workweek.
1135 AM CST Sun Dec 10 2017 Warmer weather will spread into the region today and Monday as highs top out in the 50s both afternoons. An upper level trough will dive south through the region Monday sending a front south through the area.
159 PM PST Sun Dec 10 2017 High pressure will continue to bring dry conditions along with valley inversions, cold nights, and light winds for the next several days. Inversions may ease by the end of the week as a weak cold front brushes the Oregon Border, but no precip is expected.
A north-south warm front extended from northern Saskatchewan, across western Manitoba, and along the Devils Lake Basin and James Valley in the Dakotas. The loss of mid-level clouds later on Monday with low level clouds may result in supercooled low levels, allowing light snow to mix with some light freezing drizzle Monday afternoon before the precipitation ends. The strong winds keeping the lower levels well-mixed will keep temperatures from dropping much tonight.
Strong upper high continues over the west with dry weather, chilly nights, and mild days.
Fog and low stratus continue under the influence of the area of high pressure.
With temps forecasted to be in the lower to mid 60s today. Low temperatures in the low 20s to low 30s. For tonight a west wind around 10 mph through midnight then increasing slightly after midnight ahead of approaching cold front. some cooler air backs into the area during the day with 850mb temperatures dropping about 7F (west) to 13F (east). This would support highs in the low to mid 50s which is currently advertised in the forecast.
352 PM CST Sun Dec 10 2017 As of 20Z Sunday afternoon, stagnant mid-level pattern continues across the CONUS with a large trough in the eastern US and a highly amplified ridge in the west. High temperatures look to range from the low 50s along the KS/NE border, where cloud cover overspreads slightly sooner, to the mid 50s in central KS.
1217 PM EST Sun Dec 10 2017 A strong upper level trough and accompanying surface cold front will cross the Carolinas early this morning. High pressure will build into the area and extend across the region through Monday.
320 PM CST Sun Dec 10 2017 Large scale flow over the CONUS will be stagnant over the next several days with mean ridging west/trof east.
The upper pattern is jostled some as an upper low smashes into it to the west of Washington state.
403 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.
High pressure remains firmly in place across much of the western United States of America which has resulted in the formation of strong valley inversions. Within these inversions we are seeing persistent low clouds (stratus), freezing fog and stagnant air.
A cold front entering far nw IL late this morning will push se dry across CWA during the afternoon, reaching se IL by sunset as brisk sw winds gusting 20-30 mph turn nw over central IL. Temps currently in the low to mid 30s, will rise to seasonable levels in the upper 30s and lower 40s for highs this afternoon. Mondays highs move into the 40s, but the trough/wave bringing snow chances to the north and east is accompanied by the second round of deep cold air and flurries with Monday night temps drop into the 20s.
1129 AM CST Sun Dec 10 2017 An upper level trough presently centered over the Ohio Valley will shift eastward today while upper level ridging to our west nudges into our area. Low pressure over south central Canada drops into the Upper Mississippi Valley by late tonight, driving a cold front into our area by Monday morning. The cold front sweeps through the region on Monday, and it will become windy in a tight gradient and winds at the top of the mixed layer running around 40 to 45 kts, resulting in the potential for near Wind Advisory criteria at times, so will be something to watch for in future forecasts.
As we move into the overnight hours, a few high clouds are possible, but with a southwesterly boundary layer flow, we should be 8-10 degrees warmer tonight than last night. Will run a couple degrees cooler.
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/.
The clipper system will then drag a moisture starved cold front southeast through the region Monday night.
These conditions should persist this week as the upper pattern becomes stagnant with a ridge of high pressure holding over the western states. Northwesterly flow aloft over the Central Plains will send a series of cold fronts into the CWA, but this pattern will prevent a significant cold airmass from developing in Canada so the fronts will be weak and only provide modest cooling. In addition, the upper troughs associated with these fronts will remain well to our north so there will not be any precipitation associated with any of the frontal passages.
/Issued 643 AM EST Sun Dec 10 2017/ Near-term grids mostly on track but temps still just a bit warmer than forecast but still 20s in all but far southeast. Some concern that we might see freezing fog this morning or late tonight, but based on observed trends and very dry conditions immediately above the surface, no fog is anticipated. Black ice potential exists nonetheless, but may be a little lower coverage due to slightly warmer temps. Larger scale pattern remains fairly static through the period with ridging dominating the western half of the country and troughing over the east. A couple of decent short waves sweep through the large eastern trough through the upcoming workweek.
234 PM EST Sun Dec 10 2017 High pressure will bring a brief period of fair weather to the Appalachians and central mid Atlantic region to start the workweek.
We seem to be stuck in NW flow with a Rex Block type pattern over the western Conus, and a downstream trough across the east with periodic short waves traversing through the NW flow. These disturbances are sending weak cold fronts across our region every couple of days.
Warmer Start To The Workweek Expected. SHORT TERM (Tonight through Monday Night): Pretty tranquil weather to prevail across the RGV as a 500 mb Rex blocking pattern will persists over the western States throughout tomorrow night. Meanwhile deep 500 mb troffing will dominate the eastern states throughout the short term. At this time, not expecting any widespread freezing/frost conditions as the anticipated dewpoints appear to remain well above the freezing mark throughout tomorrow night.
220 PM MST Sun Dec 10 2017 A ridge continues to hover over the western part of the country. Tomorrow, a closed low will pass just south of the Borderland bringing more high clouds, and a slight chance for precipitation in the New Mexico Bootheel. For the rest of the week, two weak backdoor cold fronts approach the area, but without any significant impacts besides the usual wind shift and slightly colder temperatures. The ridge continues to build up in western US which leads to mild and dry conditions. However, a closed low will be passing closely south of the Borderland tomorrow.
There is some mid level moisture just ahead of the surface front and soundings are supportive of snow through the profile down to the lowest few hundred feet though, depending on location, there may be a deep enough warm layer to melt. Over the course of the day, mid level dry air will move in, and low level steep lapse rates don't move high enough to reach the dendritic growth zone so while we may see afternoon shallow cumulus, snow showers are not expected to linger behind the low.
1200 PM CST Sun Dec 10 2017 A weak north-south warm front has been inching eastward most of the night but has stalled west of I-35. Another thing to watch is whether freezing drizzle can develop in the warm sector (western and southern MN) as ice is lost aloft with the dry slot and/or temps aloft warm above freezing.
1031 AM MST Sun Dec 10 2017 Pattern remains stagnant through the short term period with the moisture blocking Rex over the Western States.
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.
he mean longwave trough over the eastern CONUS will become reinforced late tonight into Monday. Temperatures will be a bit warmer tonight, though a light freeze is still anticipated across interior southeast Mississippi and southwest Alabama. Highs are expected to reach into the lower to mid 60s.
248 PM CST Sun Dec 10 2017 Little has changed in the synoptic pattern across the CONUS with the latest updates, as a highly amplified upper ridge continues to dominate the western half of the U. while a deep trough sits over the east.
A strong upper ridge will maintain dry and stagnant conditions across Western Washington through the middle of the week.
Used a blend of the previous forecast with some high res model guidance to allow fore a wider spread of highs in the lower 50s most areas south and west of the Missouri River, and mid to upper 40s just to the north and east of the river.
209 PM EST Sun Dec 10 2017 High pressure will remain across the area through Monday.
105 PM EST Sun Dec 10 2017 Cold and dry high pressure will be over the region today through Monday night with temperatures well below normal.
A cold front will pass through the region Monday, and the winds will be from the north around 15 to 20 mph with gusts approaching 35 mph. A cold front will pass through the region on Monday, and afternoon wind speeds from the north will be 15 to 20 mph with gusts approaching 35 mph.
306 PM CST Sun Dec 10 2017 Main forecast concern is the elevated fire weather conditions expected across portions of northeast Oklahoma and northwest Arkansas tomorrow both immediately ahead of and immediately behind an approaching cold front. The highest afternoon wind speeds in northeast Oklahoma should follow the frontal passage mid to late afternoon, and with the cooler air lagging the initial wind shift, there should be a short window when Red Flag conditions are met near the Kansas border and possibly as far south as Highway 412.
The next dry cold frontal passage can be expected Monday as the overall weather pattern remains generally unchanged. Southwest winds will be gusty today and increase Monday ahead of an approaching cold front.
119 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.
306 PM EST Sun Dec 10 2017 A long wave trough axis extends south down the Appalachians and reaches deep into the Gulf of Mexico. The cold front which blasted through the Florida Keys yesterday has stalled over eastern Cuba and Jamaica. Current temperatures are only a few degrees above the lows this morning. In fact, portions of Key Largo have not reached 60 yet, and the high this afternoon at the office is 62 degrees. Stratocumulus layers based near 3 kft have plagued the Lower Keys this afternoon.
Monday will be a repeat of today, with temperatures a few degrees warmer in the mid-upper 60s with the potential for a few places to make it over 70.
A strong cold front will move through Monday morning resulting in falling temperatures by afternoon with strong and very unpleasant north northwest winds. Temperatures will actually remain rather mild tonight for this time of year just ahead of the cold front with lows generally around 30 degrees. There will be strong mixing behind the cold front. Kansas counties should see highs in the low 50s before temperatures also begin to fall there by early afternoon. The current pattern of an upper level ridge over the western United States and an upper level trough across the eastern United States will persist throughout the forecast period. The upper ridge will become less amplified with time gradually flattening out some. Will be one of the cooler nights behind Monday's cold front, but lows will still be above normal in the lower to middle 20s.
Issued by National Weather Service TAUNTON MA 416 PM EST Wed Jan 24 2018 Canadian high pressure builds in for the rest of the week.
1019 AM CST Wed Jan 24 2018 Full sunshine today along with a light downslope component to surface winds will result in warmer temps this afternoon. /Issued 303 AM CST Wed Jan 24 2018/ The weather across eastern Oklahoma and western Arkansas will be rather benign Today as high pressure prevails.
Below normal temperatures and dry weather will be the rule for the remainder of the work week as high pressure builds into the region. Forecast is in good shape this afternoon as high pressure builds in behind the cold front from overnight. Highs wont be much warmer than they were at day break. With the sharply falling temperatures secondary roads and sidewalks may be freezing up and have issued a special weather statement for black ice potential this morning. Dry weather is expected tonight with clouds breaking up and winds tapering off as high pressure builds into the region. With high pressure over the area on Thursday dry weather will continue with more sunshine than today.
845 AM PST Wed Jan 24 2018 The weather will be sunny and warm again today with weak high pressure over the Great Basin. Thursday will be cooler with more clouds as a trough moves inland across central California. This trough will also bring gusty west winds to the mountains and deserts.
High pressure aloft will result in a warming trend through Thursday, with dry conditions and breezy winds at times.
Thursday morning lows will dip to near freezing across northern and inland areas thanks to ideal radiational cooling and cold air drainage.
421 PM EST Wed Jan 24 2018 WV imagery and RAP analysis indicated mid/upper level ridging over UT through the nrn Rockies and a downstream trough over the Great Lakes into the OH valley. Otherwise, patchy sunshine prevailed over Upper Michigan as weak sfc ridging moves off to the east. Tonight, the combination of the shrtwv and weak trough may bring some light snow showers through wrn Lake Superior into the Keweenaw. Thursday, WAA will increase as the mid level ridge move eastward and low pressure develops into the plains. Mid/upper level ridging will advance through the cntrl CONUS to the Great Lakes from Wed into Fri as a trough moves through the wrn CONUS.
Mild and breezy today ahead of an incoming cold front and associated weak trough. This ahead of the slow moving cold front which will begin its journey east through the region, spreading valley rain/snow and mountain snow west to east, beginning this evening in southeast Oregon. Southwest flow aloft will precede an offshore trough situated off the west coast. Most areas will remain dry today, except for light precipitation is expected in portions of southeast Oregon - located near the leading edge of the trough. The trough will push inland and send a cold front through our area tonight. Instability associated with a weak trough will support isolated to scattered snow showers in the afternoon, with additional light accumulations possible in the northern mountains. Temperatures will be cooler, with highs near to slightly above normal.
256 PM MST Wed Jan 24 2018 High pressure today ahead of a weak cold front beginning late Thursday will result in warmer temperatures through Thursday along with continued dry conditions.
200 PM EST Wed Jan 24 2018 The back edge of this morning's freezing drizzle and snow is gliding southeast over the southern shore of Lake Michigan. Some locations in the east are reporting freezing drizzle, but we expect all locations to transition to snow as this feature moves through.
219 PM CST Wed Jan 24 2018 A midlevel ridge is currently building over the plains as a strong trough over the Pacific Northwest continues to progress eastward. It is these locations that will likely be slightly cooler than surround areas due to the snow pack inhibiting daytime mixing. Tomorrow the westerly midlevel flow over the eastern Rockies should promote a deepening lee trough. The lowest SREF member with minimum RH value is at 25 percent in central KS perhaps getting into the far southwest counties of the forecast area.
247 PM EST Wed Jan 24 2018 Light lake effect snow will taper off tonight, then high pressure will bring clearing skies for Thursday. With surface ridging not forecast to begin until tonight, we increased POPs for today and extended the lake bands farther to the south and east. Colder air is pouring into CNY/NEPA early this morning, owing to a strong WNW flow in the lower levels of the atmosphere.
1145 AM CST Wed Jan 24 2018 For the 24/12Z TAF period, VFR conditions will continue to prevail as high pressure remains anchored at the surface. This high will shift overhead tonight with winds going calm at almost all sites, then trending southeasterly on Thursday as the high shifts farther eastward with speeds averaging around 5 kts or less.
Prior discussion below: Today and tonight: High pressure will continue to slide into the region from the northwest today. Overnight lows will drop to the lower 30s.