Aikyam-Lab/Synoptic-Bench huggingface dataset:
* None Mid level low that tracked across lower Michigan through the base of the longwave trough, is now lifting northeast through southern Ontario away from the area. There is a filament of vorticity rotating around the backside of the low, which is trying to nose into northern Michigan. It sparked a few showers over northern Lake Huron, but dry air behind the cold front dropping through mid MI (dewpoints in the 30s!) is quickly eroding them. High pressure will start building into the area tonight, bringing with it the dry air already moving into northern Michigan. The aforementioned dome of high pressure will then center itself over southern Michigan by Wednesday evening.
641 PM CDT TUE JUN 28 2016 Northwest upper level flow continues over the central US with a seasonal hot ridge extending from the Four Corners Region north into the Canadian Rockies.
642 PM CDT TUE JUN 28 2016 Warming trend into Wednesday as a cold front approaches from the north resulting in increasing clouds and a chance for showers and storms. On the synoptic scale the northwest flow pattern across the northern Plains and upper Midwest will continue through mid-week due to a ridge over the Rockies and a longwave trough over Appalachia. A cold front will approach from the north Wednesday, but not before warmer air can advect in from the west ahead of the front result in a slightly warmer day. Winds will also be breezy especially along the international border just ahead of the cold front, out of the west-southwest at 5-10mph with gusts to 15-20mph due to deep mixing. Isolated to scattered thunderstorms are expected Wednesday afternoon along and ahead of the cold front approaching from the north.
756 PM EDT TUE JUN 28 2016 Offshore high pressure will introduce a more humid air mass to the region on a southerly wind. A slow moving cold front approaching from the west will bring scattered showers and thunderstorms through Wednesday.
/issued 252 PM CDT TUE JUN 28 2016/ SHORT TERM (Tonight through Wednesday Night): Overall, a high-pressure ridge axis aloft stretching back toward the Four Corners region continues to dominate the region.
Lingering cloud cover associated with an old boundary will slowly drift south as a cold front approaches from the north. Even drier air is further north behind a cold front extending through southern Missouri and Kentucky, where dewpoints drop into the lower 60s to mid 50s. Cold air advection via northwesterly flow aloft and cooler morning temperatures in the lower to mid 60s will give us a noticeable break from recent heat towards the middle of the week.
Otherwise, drier air continues to filter into the northeast half with dewpoints down into the low to mid 60s per surface obs. Dewpoints will continue to lower as dry air oozes south overnight, with lows in the low to mid 60s expected. Basically good flying weather for the next 24 hours as surface front moves down through the area followed by high pressure with light northerly flow reinforcing the somewhat dry air mass that is already in place.
647 PM CDT TUE JUN 28 2016 An isolated shower or perhaps a few stray thunderstorms are possible across the far southern CWA late this afternoon, but the best pcpn chcs will continue to shift southward in tandem with a southward-moving cold front. Overnight lows in the mid 50s to low 60s should be roughly 5-10 degrees colder than last night, which is cooler than average for this time of year.
1127 PM EDT Tue Jun 28 2016 A cold front will continue to move southeast tonight and stall to the south by Wednesday morning. High pressure will build in the wake of the front.
This activity appears to be developing near a 700mb theta ridge. The upper ridge over the Four Corners will gradually weaken with swath of monsoonal moisture overspreading the CWA.
526 PM CST Thu Mar 2 2017 Current GOES Water Vapor imagery showing a mid-level trough swinging southeast through southern WI. For tonight, high pressure builds across the region providing mostly clear skies. High pressure slides east of the region by Friday afternoon as a warm front pushes north out of the Plains. Increasing warm air advection/isentropic lift ahead of the warm front and approaching weak mid-level trough will produce a chance of light snow Friday night.
316 PM MST Thu Mar 2 2017 Northwesterly flow will decrease tonight before turning westerly Friday as an upper ridge pushes in from the west. The warming airmass will allow for warmer minimum temperatures tonight through winds will be lighter so some lower areas may see similar readings to last night. Winds will remain gusty over the high terrain and along the northern state border, with lighter winds elsewhere. A dry and warm weekend look to be in store across the northern half of the state as a trough develops along the west coast.
/Issued 300 PM EST Thu Mar 2 2017/ High pressure will continue to build into the forecast area through the short term. and a reinforcing cold front will keep gusty northwest winds over north and central GA. Expecting temperatures at or just below freezing Friday night mainly across the north.
749 PM EST Thu Mar 2 2017 High pressure will build into the area behind the cold front promoting dry and cooler weather through the weekend. IR satellite imagery shows cirrus clouds over much of the region while cooler and drier air occupy the surface. Dry High pressure will be across the region Friday through Friday night. Minimum temperatures Friday night are expected to be at or below freezing across the northern and central Midlands, and in the mid 30s over the southern Midlands and CSRA.
519 PM CST Thu Mar 2 2017 Much of the snow has ended, as high pressure over northeastern ND slowly extends a ridge over eastern SD and western MN. The area of high pressure will slide to our east, extending from MN through northern MO overnight. Highs will likely range from the low 30s northeast, to the low 50s southwest.
A cold front will sweep across the terminals near dawn bringing in the possibilty for MVFR ceilings at TRI in the 10-13z timeframe. Chattanooga Airport, TN 34 55 30 60 / 0 0 0 0 Knoxville McGhee Tyson Airport, TN 32 50 27 55 / 10 0 0 0 Oak Ridge, TN 33 50 26 56 / 10 0 0 0 Tri Cities Airport, TN 31 47 22 51 / 10 10 0 0.
As the high slowly shifts off to the south and east, the coldest temperatures should move into northern Minnesota as winds pick up behind the high across eastern North Dakota. Water vapor loop indicated a short wave trough over northern MN and was moving away from the area. Upper level ridge over western North America will shift into the High Plains by Fri afternoon. Cool night expected again tonight with the lowest temps expected in the east/northeast zones. Much warmer weather expected for Fri with 925 hpa temps rising significantly.
Lows tonight will be from the lower 30s in the north, to the mid and upper 30s in the rest of the state. Highs on Friday will be from the lower 50s east, to the mid 60s west.
with most of the Midsouth in the low to middle 30s. Surface analysis places a 1031 mb ridge of high pressure centered over Arkansas this afternoon.
545 PM CST Thu Mar 2 2017 Early afternoon objective surface analysis indicated ridge axis extending from eastern ND into western NEb, and this is expected to develop across the FA overnight.
Main concern through the short term will be expanding threat for critical fire weather conditions across southeast CO ahead of an approaching upper trof for late weekend. Surface lee trough deepens overnight which should keep min temps slightly warmer than last night along the lower eastern slopes. looks like breeziest conditions will be across the southeast corner of the state along the east side of the lee trof.
450 PM MST Thu Mar 2 2017 17Z water vapor imagery and RAP analysis indicated broad troughing across central and eastern portions of the country with ridge over west coast. At the sfc, high pressure was settling over the area. A few mid clouds may develop along H7 thermal ridge do to persistent WAA, but shallow moisture profiles and stable conditions would keep precip threat essentially zero. dry conditions will prevail as H5 ridge shifts to the east and nears the CWA. With deep westerly flow think leaning on the warmer/drier solutions are in order and pushed deterministic forecast towards that envelope of solutions.
600 PM CST Thu Mar 2 2017 Afternoon relative humidities are in the low to mid 20s with winds in the 10-20mph range across the Red Flag area. Upper level ridge currently over the Pacific Northwest will build into the Plains states into the weekend.
The broad flat "dirty" ridge that brought the recent dry weather has now moved off to the east. A long wave trough is digging offshore.
With the ridge centered thru the middle of the CWA at 12z Friday, have trended temps aob the coolest guidance tonight. Still believe there will be enuf insolation to trend twd the warmer guidance given the temps upstream.
637 PM EST Thu Mar 2 2017 Aviation A cold front will bring light snow showers tonight with light accumulations of around an inch or less.
Strong high pressure to the northwest will build in behind this front bringing cooler and clearing conditions through Friday and into the weekend.
Clouds continue to be found across much of central and eastern portions of the CWA as a result from a warm front pattern.
Cold front with associated showers have pushed se of the area this evening.
Dry and mild weather continues into the day Friday as high pressure continues to dominate.
/issued 257 PM CST Thu Mar 2 2017/ SHORT TERM (Tonight through Friday Night): High pressure building in behind a cold front is delivering cool, dry air at the surface and, along with a somewhat flaccid 500 mb flow overhead, will produce cloudy, mild weather for deep South Texas and the Rio Grande Valley during the short term forecast period.
Strengthening easterly flow is expected to strengthen Friday and Friday night as coastal troughing across NE MX/Lower TX Coast tries to develop.
403 PM CST Thu Mar 2 2017 Tonight and Friday: Cooler than normal and dry weather will continue through the period. The 1032mb high centered over the Red River valley this afternoon will shift east tonight then be replaced by an even stronger center of high pressure from the north Friday. Lower 30s are expected over the northeast third of our CWA where coldest locations may reach freezing and frost will be likely. Normal morning lows this time of the year run in the lower 40s. The resulting pressure gradient will be weaker than today so temperatures will top out several degrees warmer than this afternoon. Normal highs run from the lower 60s north to the upper 60s south.
Once this feature passes to the east, skies will clear from west to east with overnight lows dropping into the lower to middle 20s. Temps were in the low to mid 40s over southeast IL from Shelbyville to Charleston/Mattoon and Paris southeast. Could be some light rain showers late this afternoon/early evening south of I- 72 before cooler air changes light pcpn to light snow showers. Clouds to quickly decrease from nw to se during tonight as 1038 mb Canadian high pressure settles into IL Fri morning. Nearby high pressure Friday morning will bring a fair amount of sunshine, but mid/high clouds to already increase during Friday afternoon ahead of next approaching northern stream clipper system.
We will finally see some below normal temps overnight as mins dip around 5 degrees below normal for this time of year, with mins near 40 over the north to the lower 50s along the immediate coast. Moderate to occasionally strong northeast winds will gradually transition to the east and southeast as a coastal trough develops.
Still expecting 1-3" over the higher terrain through the overnight, with an inch or less elsewhere. The trough will descend out of the southern Great Lakes and will spread quick moving snow showers across the northern half of the forecast area. A quick accumulation is likely, even spreading into the upslope areas of the Ridges.
655 PM EST Thu Mar 2 2017 High pressure will build into the area behind the cold front promoting dry and cooler weather through the weekend. The models show dry high pressure continuing to build into the forecast area from the west tonight. Some of the guidance has temperatures around freezing but this may be too cold because of mixing associated with the high building into the area. Dry High pressure will be across the region Friday through Friday night. Minimum temperatures Friday night are expected to be at or below freezing across the northern and central Midlands, and in the mid 30s over the southern Midlands and CSRA.
/issued 155 PM CST Thu Mar 2 2017/ It is another seasonably cool day across the area today, with afternoon temperatures expected to top out in the lower to middle 60s for most of the area. Temperatures Friday will be similar to today, with highs in the lower 60s for most locations. By Friday evening, zonal flow aloft will transition to the southwest, ahead of an upper trough that will quickly move eastward across northern Mexico.
/Issued 235 PM CST Thu Mar 2 2017/ A weak cold front which lies from southwest to northeast from near Hereford to Lipscomb will slowly push through the rest of the Texas Panhandle tonight. A new lee-side trough will encourage gusty southwest winds to develop again on Friday.
High level clouds will continue to stream in from the west as a weak upper level ridge remains in place. Clouds could keep temperatures a little warmer overnight. Upper level ridge moves east Friday as the next Pacific Storm approaches the Pacific Northwest. Showers will increase Friday afternoon and evening across mainly Southeast Oregon and the higher terrain of Southwest Idaho.
1003 PM EST Thu Mar 2 2017 Update A cold front will bring light snow showers tonight with light accumulations of around an inch or less.
Cooler air will be filtering into the area during the weekend, lowering snow level to 1500 to 2000 feet. With the cloud cover acting as a blanket, overnight lows will be a few degrees (perhaps several degrees in a few spots) warmer than last night.
A cold front extending from the northern Atlantic across central Florida and into the Gulf of Mexico tonight will continue to move over the peninsula and reach the Keys on Friday. But it will definitely compensate with winds as a high pressure builds over the mid-Atlantic states this weekend and increase the pressure gradient over the southeast U.
Expect the low occur around then. High pressure looks to become reinforced across the region from the n starting Fri, with a continued influx of cooler/drier air. The flow pattern aloft looks to remain fairly stagnant as well, as a broad upper trough pattern across the Great Lakes/NE Atlantic states maintains a predom wnw flow regime over the region. With more of an ely/sely fetch developing in the afternoon hrs, temps may be able to climb into the lower 60s for some areas, under continued mostly sunny skies.
High pressure will continue to settle over the area tonight. /issued 240 PM CST Thu Mar 2 2017/ Wx map shows high pressure building in from TX/OK/AR, keeping a modest pressure gradient along and south of I-10, including the coastal waters. Expecting the coolest night this evening into Friday morning with lows in the lower/mid 40s, with a few upper 30s across Central Louisiana. High pressure to our north will continue sliding east by the afternoon, with northeast winds becoming east.
Much of the snow has ended, as high pressure over northeastern ND slowly extends a ridge over eastern SD and western MN. The area of high pressure will slide to our east, extending from MN through northern MO overnight. Highs will likely range from the low 30s northeast, to the low 50s southwest.
/28/ Tonight and Friday: Cooler than normal and dry weather will continue through the period. The 1032mb high centered over the Red River valley this afternoon will shift east tonight then be replaced by an even stronger center of high pressure from the north Friday. Lower 30s are expected over the northeast third of our CWA where coldest locations may reach freezing and frost will be likely. Normal morning lows this time of the year run in the lower 40s. The resulting pressure gradient will be weaker than today so temperatures will top out several degrees warmer than this afternoon. Normal highs run from the lower 60s north to the upper 60s south.
Breezy north winds surging swd will bring drying and cooler temps as the post frontal high moves into the region by early Fri.
655 PM EST Thu Mar 2 2017 The region will remain under cyclonic flow from departing low pressure area over the Canadian maritimes.
/12/ Prior discussion below: Tonight and Friday: Cooler than normal and dry weather will continue through the period. The 1032mb high centered over the Red River valley this afternoon will shift east tonight then be replaced by an even stronger center of high pressure from the north Friday. Lower 30s are expected over the northeast third of our CWA where coldest locations may reach freezing and frost will be likely. Normal morning lows this time of the year run in the lower 40s. The resulting pressure gradient will be weaker than today so temperatures will top out several degrees warmer than this afternoon. Normal highs run from the lower 60s north to the upper 60s south.
347 PM MST Thu Mar 2 2017 Northwesterly flow will decrease tonight before turning westerly Friday as an upper ridge pushes in from the west. The warming airmass will allow for warmer minimum temperatures tonight through winds will be lighter so some lower areas may see similar readings to last night. Winds will remain gusty over the high terrain and along the northern state border, with lighter winds elsewhere. A dry and warm weekend look to be in store across the northern half of the state as a trough develops along the west coast.
It will remain dry and mild with highs today in the lower 40s and 45 to 50 on Thursday.
340 AM EST Wed Jan 18 2017 Under mostly clear skies, temperatures in the Florida Keys are in the lower 70s. Under a moderate and persistent mid to upper level ridge with a stable and dry layer above limited low-level moisture, the chance for measurable precipitation is quite low for the next several days.
In-conjunction with the low ceilings, scattered showers will also be in the forecast, especially at KAMA. /Issued 218 PM CST Tue Jan 17 2017/ Upper level low moving just east of the bootheel of New Mexico will team up with subtropical moisture to bring a fairly good chance of showers to the region tonight. The upper level low will track northeast tonight and will move into Kansas on Wednesday.
233 AM MST Wed Jan 18 2017 09z surface analysis had lee trough/warm front from eastern MT into central NE. Today and tonight, weakening upper ridge remains in place with temperatures in the 50s over the higher terrain, 40s where snow cover is becoming patchy, and 30s over areas of entrenched snow cover. Upper low currently over the southwest will move into the central plains with some high clouds pushing into the CWA late. Thursday, upper low spins northeast, replaces upper ridge, and weakens as upper trough develops over the west. A west coast upper trough will move into the region towards the end of the week and into the weekend, bringing cooler air (highs in the 30s) and chances for light precipitation.
257 AM EST Wed Jan 18 2017 Low pressure passes well south of the region today.
954 PM MST Tue Jan 17 2017 Latest upper analysis shows the region under the influence of a an upper ridge. The surface analysis depicts a weakly defined N-S oriented trough across the central Dakotas/Nebraska. 850mb temperatures will generally be around 3C warmer than today. As upper ridging remains across the region Thursday, another relatively warm and dry day is expected. A west coast upper trough will move into the region towards the end of the week and into the weekend, bringing cooler air (highs in the 30s) and chances for light precipitation.
with KLAL/KPGD seeing the highest potential for a brief IFR period.
Expect one more cold night, then cooler temperatures aloft will weaken the inversion and allow some moderating temperatures in most, but possibly not all of the southwest valley locations. A broad synoptic scale trough crosses the western U.
331 AM EST Wed Jan 18 2017 A weak cold front in the forecast area today will be south of the area tonight. Ridging will extend through the region in the wake of the front tonight and Thursday.
1106 PM MST Tue Jan 17 2017 Upper low over NM will lift back north and eastward over the next 24 hours. Lee troffing tonight will result in better westerly drainage flow near the mountains. should see warmer conditions on Wednesday. Flow aloft across the region transitions to more west to southwest through the day on Thursday, as old cut off low continues to lift north and east into the High Plains as short wave ridging builds into the region ahead of another eastern Pacific system continues to dig into the Great Basin. Should continue to see dry weather across the area, with lee troughing leading to breezy westerly flow along and west of the I-25 corridor leading to temperatures warming back to above seasonal averages on Thursday.
Thus we are seeing rain, freezing rain, sleet and snow. Freezing rain has locally accumulated to a quarter inch in the Gorge, the Yakima valley and the Simcoe highlands. Winds remain strong over the Grande Ronde valley, especially the south end, and the high wind warning will be continued through tonight. Low temps in many of the cold pool areas will continue to rise through the night due to downward heat transport by the precip or by mixing of warmer air from aloft.
This should lead to another evening for fog to develop across eastern portions of the area Wednesday, especially in the low lying areas. Another mid/upper level low pressure will lift out over the plains on Thursday. On Thursday night the lift and moisture will increase in the lower levels, but moisture will be lacking in the mid levels.
1149 PM EST Tue Jan 17 2017 A weak area of low pressure will move northeast up the Saint Lawrence valley overnight. A secondary low pressure area will form south of Long Island late tonight and will move slowly eastward south of New England on Wednesday. A mix of snow, sleet, freezing rain and rain will be over the North Country overnight through Wednesday. A ridge of high pressure will slowly build into the north country on Thursday and will remain over the region through this weekend.
328 AM EST Wed Jan 18 2017 A cold front will pass through the area this morning. High pressure will build toward the region today before settling overhead Thursday.
Window for possible freezing drizzle appears narrow as well, with low temperatures likely bottoming out right at or just above freezing from the M-59 corridor northward. Daytime readings arriving in the lower and middle 40s.
That will lead to decreasing clouds by afternoon and warmer afternoon temperatures. Skies should clear tonight as high pressure builds into the area.
However low level moisture in the southerly flow will increase as the main upper trof moves out across the central/southern Plains Wednesday night through Thursday.
Have kept skies mostly cloudy through the morning, but most of the area should be seeing some sunshine by afternoon as a ridge of high pressure drifts eastward. Wednesday temperatures will be dependent on how fast the low clouds break, but mid-upper 40s appear feasible, especially over the southwest CWA. High pressure moving off to the east will allow moisture to return to the area just ahead of the next weather system coming out of the southern plains. With the further northwest track and the warmer temps, all precip should be in the form of rain through the period.