Aikyam-Lab/Synoptic-Bench huggingface dataset:
747 PM EDT Sun Mar 18 2018 A weak cold front will drop across the region tonight. High pressure will then build back into the region Monday, with this system influencing our weather through the end of the week. A weak backdoor cold front continues to drop southward across CNY and the Genesee Valley this evening. However dry boundary layer conditions and through the lower atmosphere will limit this snow to just a few flurries south of Lake Ontario later tonight. Clear skies through much of the overnight, with a few mid level clouds expanding south of Lake Ontario behind the cold front. On Monday high pressure across western Ontario province will ridge toward our region.
1049 PM EDT Sun Mar 18 2018 Cold high pressure will continue to build down from Canada tonight and Monday.
903 PM CDT Sun Mar 18 2018 A developing area of low pressure is currently centered over southeast Colorado. With the sun and slightly drier air aloft over the region, temperatures warmed into the low 50s by this afternoon.
Cool and dry weather to prevail mid week amid high pressure at the SFC and NW flow aloft. Flattening flow aloft and returning low level southerlies will yield increasing moisture and warmer temperatures to end the week, with low end rain chances by the weekend as a front sags toward but stalls just north of the area. 13 A light onshore flow will continue tonight as the northwest Gulf remains between low and high pressure systems. As an upper low advances into and through the mid Mississippi valley on Monday, a westerly flow will develop as a surface front passes through.
1148 PM CDT Sun Mar 18 2018 A developing area of low pressure is currently centered over southeast Colorado. With the sun and slightly drier air aloft over the region, temperatures warmed into the low 50s by this afternoon.
A broken band of showers and thunderstorms has already formed over Oklahoma in the warm sector ahead of the low. Focus then turns to precipitation on the actual cold/warm front early Monday. Guidance is showing strong low level moisture convergence along the front wrapping back into the triple-point and the occlusion as the low moves along the Missouri/Arkansas border on Monday. Temperatures will be very dependent on clouds and precip through Monday, but expect it to be similar to today with highs perhaps a couple of degrees warmer due to the warm advection ahead of the low.
With the sun and slightly drier air aloft over the region, temperatures warmed into the low 50s by this afternoon.
Upper low has moved east. Weak ridging aloft Monday will warm temps a little from today.
955 PM EDT Sun Mar 18 2018 High pressure will build overhead through tonight.
730 PM EDT Sun Mar 18 2018 High pressure through Monday. As of 230 PM Sunday High pressure system will keep the area cool and dry through the period. Clear skies and clam winds could allow for radiational cooling, making temperatures to drop around freezing in some places overnight. Low pressure approaches from the southwest on Monday night. Across the Lowlands and Southern Mountains any precip should fall as rain, but in the Northern Mountains things are a bit more complicated.
An offshore upper low will bring spotty showers to the mountains and coast through Monday, mainly during the afternoons and evenings.
Snowfall totals will range from 2 to 5 inches, with the highest totals found near the Dakota borders. Elsewhere, a few snow showers can be expected across the western mountains, with perhaps a few showers making out onto the lower elevations. A broad upper trough extending from the Northern Rockies all the way to Arizona. The strongest piece of energy is moving through the bottom of the trof in the southern Rockies and will not impact us. Precip is expected to shut down after the trof axis passes on Monday morning.
High pressure will bring a warming trend the first half of the week.
The gradual warming trend witnessed late last week and into the weekend continues, with min temps slightly above average in the low 60s.
940 PM EDT Sun Mar 18 2018 High pressure through Monday. As of 230 PM Sunday High pressure system will keep the area cool and dry through the period. Clear skies and clam winds could allow for radiational cooling, making temperatures to drop around freezing in some places overnight. Low pressure approaches from the southwest on Monday night. Across the Lowlands and Southern Mountains any precip should fall as rain, but in the Northern Mountains things are a bit more complicated.
1241 AM EDT Mon Mar 19 2018 Cold high pressure will continue to build down from Canada tonight and Monday.
749 PM EDT Sun Mar 18 2018 Cold high pressure will continue to build down from Canada tonight and Monday.
624 PM CDT Sun Mar 18 2018 A low level stratus deck has inhibited solar insulation and in turn kept the area much cooler than the guidance was recommending. As this low deepens it will help advect moisture from the Gulf of Mexico up into our area with a warm front and occluded boundary providing the lift necessary to make Monday a rather rainy day. Frontogenesis over SE Kansas overnight will enhance the warm frontal boundary and eventually allow wrap around moisture and overrunning to push into our area Monday morning. The low will quickly move W to E across Missouri with precipitation ending by late Monday afternoon into the evening.
Low pressure in the lee of the Rockies will move east tonight. High pressure will build into the plains on Monday and very dry air will be present over the CWA.
739 PM EDT Sun Mar 18 2018 Aviation A cold front will move through Lower Michigan tonight. Cooler northeast winds behind the front will result in Monday temperatures at least 10 degrees below today's highs.
So for now went a bit warmer, but wanted to stay within collab among the neighbors. The area is currently under an upper level ridge with a disturbance moving northeastward across the western Dakotas. Light snow accumulations are expected during the day on Monday as a lot of melting is expected with temps near freezing and the fact that it's falling during the day.
Low pressure off the Washington and north Oregon coasts will maintain showery and cool weather over southwest Washington and northwest Oregon this afternoon and evening, with decreasing showers Monday as the low weakens and drifts away.
Light winds will gradually become more northerly in the evening in line with a weak cold frontal passage. A cold front will be moving through the CWA tonight into Friday morning as a somewhat weak upper trough swings across the Mississippi Valley. Models still show a cutoff stuck over the Baja of California late this week, getting pickup and racing northeast this weekend as another trough drops into the Rockies.
Mid and high level moisture continues to flow across the region downstream from the upper trough over northwest Mexico into central Baja California. A cold front continues to push south through central Texas. Drier air will move into the region in the lower levels behind the front by 15Z with ceilings expected to lift to VFR. A weak trough axis has moved through the area into the coastal waters. The cold front continues to push through Central Texas at this time and should reach the northern counties of South Texas by late this afternoon. Colder air will arrive behind the cold front late this evening with winds increasing to moderate to strong levels over the coastal waters overnight into Friday.
Mid level flow pattern will back slightly from west to WSW as ridging builds northward from the Caribbean to over the Greater Antilles. Central Florida will remain in SW low level flow, thus temps will be warmer compared to previous 24 hours. In fact, Friday morning mins will average about 10-12F warmer compared to this morning.
The higher elevations will see amounts around 6 to 10 inches.
258 PM MST Thu Dec 14 2017 Stubborn freezing fog is expected to persist in the valleys of Southwest Montana through Friday morning.
200 PM CST Thu Dec 14 2017 A cool air mass and cloudy skies have kept temperatures in the middle 30s to the lower 40s across the area this afternoon.
1240 PM EST Thu Dec 14 2017 A weak ridge of high pressure will slide across the region late today and tonight with cold, but mainly dry conditions.
953 AM PST Thu Dec 14 2017 Many of the lowlands across eastern Washington and north Idaho will continue to be covered by low clouds.
104 PM EST Thu Dec 14 2017 High pressure into Friday.
For Friday, ridging aloft will dominate with dry conditions and warmer temps. However, another trough developing in the Pacific Northwest will begin to break down the ridge as it moves into the northern Rockies.
In the middle and upper levels(700-200 mb), latest available satellite imagery overlaid with model streamline analysis as of 200 pm, depict a developing positively tilted trough axis extending from Lake Superior southwest to Baja California. The trough is embedded within a flattening longwave that which encompasses the eastern two-thirds of the CONUS. At the surface and in the lower to middle levels(Surface to 700 mb), latest available land and marine surface observations and analysis as of 200 pm details a cold front extending southwest to North Texas from a weak clipper system moving east near Nantucket. Closer to the Keys, and early 15Z ASCAT pass delineates broad weak ridging across the Florida Keys and surrounding waters. Tonight and tomorrow, Weak ridging nearby will allow for one more cool night, owing to radiational cooling over the larger islands in the Chain.
Issued by National Weather Service MIAMI FL 406 PM EST Thu Dec 14 2017 High pressure holds over much of the Gulf of Mexico and the peninsula of Florida this afternoon while a frontal boundary sits over much of the Interstate 20 corridor from Georgia into Texas. Temperatures will be a tad warmer for locations south of Interstate 10 tonight, though much of the area north of Interstate 10 will see increase cloud cover overnight which will help limit some of the radiational cooling efficiency. On Friday, a mid-level trough will push down from the Great Lakes through the Tennessee Valley into Texas helping propel the front a bit more southeastward.
324 PM EST Thu Dec 14 2017 High pressure builds in from the south overnight, and shift east on Friday.
314 PM EST Thu Dec 14 2017 Seasonable and fair weather will continue through the weekend, with a dry cold frontal passage expected late Friday.
The flow aloft becomes more northwesterly and decreases considerable on Friday afternoon as an upper ridge moves in from the southwest.
Clouds will linger overnight, but high pressure will build, bringing an end to any snow threat tonight. Residual snow showers may linger into Sat, but will decrease in coverage as warmer air invades the region and heights rise. An impulse ejected from the trough in the swrn CONUS may bring light rain to the region on Sun afternoon-evening, but it will be a decaying system by the time it approaches the Great Lakes. A better chance for precipitation comes mid-week as the swrn CONUS trough phases into a nrn stream disturbance and drives a cold front through the region.
1224 PM CST Thu Dec 14 2017 Temperatures remain a little cooler than expected in the northeast FA, up around the Lake of the Woods. Water vapor loop an upper level trough over southeast MT/WY border and was moving to the south/southeast around 50 knots.
335 PM CST Thu Dec 14 2017 Today was a chillier day across the Mid-South thanks to the cold front that moved through last night. Temperatures south of the MS/TN border are in the 50s while areas to the north are much cooler thanks to some strato-cumulus clouds.
Valley inversions should redevelop tonight as the ridge of high pressure continues to be the dominant feature. The ridge finally breaks down tomorrow as a cold front swings through the Northern Rockies. First off, extreme northwest Montana could experience a period of freezing drizzle by mid morning.
Light snow that fell this morning across parts of the Oklahoma Panhandle has turned into virga showers as a cold front sags south across the region. Cold air advection with northerly winds around 15 to 25 MPH, along with cloudy skies, is aiding in keeping temperatures in the lower 40s northwest to lower 50s southeast. Winds will shift back to the southwest on Friday as a lee side trough develops east of the NM Rockies and high pressure passes to our southeast. This will help with temperature recovery, as high temperatures on Friday will be about 5 to 10 degrees warmer than today.
A weak cold front will traverse the area during the late night and early morning hours, causing winds to become northerly by daybreak Friday. A potent upper trough digs south across the Great Plains through the near term, extending as far southwest as northern Mexico by late tonight. To the east of this trough, zonal flow continues over the Deep South and Southeast U. At the surface, a ridge of high pressure builds east from the southern high plains and Texas panhandle into the lower Mississippi River Valley. This ridge pushes a weak front south through our area late tonight. North winds behind the front then usher in a cooler airmass to start the short term.
The cold front is now to the south and east of the area with a reinforcing shot of cold air arriving across the Southern Appalachians.
1257 PM EST Thu Dec 14 2017 High pressure will build into the area today and move off to the east tonight. A weak cold front will brush the region late Friday. Winds continue to decrease this morning as surface ridging builds into the region. However, most will see subfreezing highs north of the Ohio River with mid-30s for points near and south of the river. High pressure over the region at the start of the period will quickly move off to the southeast. Low pressure will track across the Great Lakes on Friday with a trailing cold front brushing the forecast area later in the day.
219 PM EST Thu Dec 14 2017 Low pressure will remain to our north tonight and Friday as high pressure builds south of the area.
Ceilings even within the cloud deck are still VFR with the lowest ceilings around 4500 feet.
259 PM EST Thu Dec 14 2017 A weak ridge of high pressure will slide across the region late today and tonight with cold, but mainly dry conditions.
Maxima will be a couple degrees above mid-day temps, in the mid-upper 20s most areas, perhaps slightly cooler where deeper snow has occurred and air is modulated by the snowpack. Clouds will linger overnight, but high pressure will build, bringing an end to any snow threat tonight. Residual snow showers may linger into Sat, but will decrease in coverage as warmer air invades the region and heights rise.
1234 PM EST Thu Dec 14 2017 VFR conditions behind a departing cold front and expect these conditions to generally continue throughout the TAF cycle.
Surface/850 trough swings through tonight which also will help in developing snow showers. An upper trough axis pushes into southern Wisconsin this evening. Weak 700 mb upward motion begins this afternoon, and may be enough for a few flurries as the trough moves across and the lower and mid level RH increases.
/issued 1042 AM CST Thu Dec 14 2017/ Cool high pressure is building into the region. As a result temps should remain in the lower and mid 40s north of I-40. to the low and mid 40s where a light breeze was being observed. Thus CAA along with cloud cover seen advancing south will keep high temperatures in the lower to mid 40s in the north. Cooler weather and lighter winds will help give the region a break from fire danger.
Otherwise, a weak cold front has moved southward to across ktyr, kggg, kshv and kmlu early this afternoon, and will continue to move southward thus affecting klfk by late this afternoon. /issued 1128 AM CST Thu Dec 14 2017/ Dense mid and high cloud in place across much of the region this morning along with weak CAA in the wake of a swd progressing cold front will keep our temperatures from warming up too much today. Surface winds will be light and variable early this morning then becoming Northerly 5-10 knots with the passage of a cold front moving to the South. /issued 437 AM CST Thu Dec 14 2017/ A weak cold front just north of the Red River Valley will move into the region, but with little effect on daytime conditions.
1246 PM CST Thu Dec 14 2017 We remain under large scale cyclonic flow with a strong ridge in place across the western CONUS and the parade of clipper systems moving through the Upper Midwest. Instead, we will see cloudy skies with flurries possible from the low stratus across the entire area. For tomorrow, the ridge shifts east and the baroclinic zone will end up moving through our area ultimately setting up in a NW to SE oriented fashion.
A weaker flow aloft and much drier air infiltrating into the high plains will preclude any chances for precip during the period. A lee side trough of low pressure will slowly develop and strengthen across eastern Colorado Friday setting up a westerly downslope flow across western Kansas, pushing H85 temperatures well above 0C. The upper trough will shift to the deep southern plains on Friday, bringing back a quick return to southwest flow across our area.
This will offset the increasing 850 mb temperatures and downslope winds or would go even warmer than what I have in there. Still temperatures will range from the middle 50s to the lower 60s.
The cold front is near CLL and will progress SE to the coast early this evening.
329 PM CST Thu Dec 14 2017 The weak cold front is near DWH and is moving southeast.
A cold front will move across the southern half of the area this aftn and bring a wind shift to the north but wind speeds wl remain less than 10kts. Mid morning surface analysis had a cold front across our Delta region that will continue shifting south today. This will be a dry cold front that will reinforce the cool dry airmass over our area behind the wind shift to the north associated with it. On the surface a cold front was approaching the forecast area from the northwest. For today a dry cold front will cross the region. Highs today will be from the lower 50s north and lower 60s south.
257 PM EST Thu Dec 14 2017 High pressure into Friday.
1203 PM EST Thu Dec 14 2017 Weak high pressure builds across the region today while a weak disturbance moves by to our south.
1128 AM CST Thu Dec 14 2017 Dense mid and high cloud in place across much of the region this morning along with weak CAA in the wake of a swd progressing cold front will keep our temperatures from warming up too much today. Surface winds will be light and variable early this morning then becoming Northerly 5-10 knots with the passage of a cold front moving to the South. /issued 437 AM CST Thu Dec 14 2017/ A weak cold front just north of the Red River Valley will move into the region, but with little effect on daytime conditions.
Looking at model soundings, there does appear to be a dry mid level layer which would contribute to lack of ice and bring a chance for light freezing rain, though road surface temperatures are above freezing so impacts very minimal if any. Mid level dry layer is depicted to slide southeast into this same area later tonight and will bring a window for light freezing rain. Band of light snow will develop from far north central ND to across the Red River Valley late tonight into Friday ahead of a warm front and our next embedded S/WV.
1115 AM CST Thu Dec 14 2017 Cloud coverage increasing over the area this morning as moisture associated with a backdoor cold front continues to overspread the area. Abundant cloud cover combined with continued cold air advection will lead to noticeably cooler temperatures today as highs barely reach the lower 40s. ridge begins to breakdown and a zonal flow develops downstream over the Plains. This should lead to increasing flow over the Rockies and leeside trough development through the day on Friday, with southwesterly flow redeveloping in a warm air advection regime downstream over the Plains. This should result in warmer temperatures with upper 40s possible across the western zones, while lingering cloud cover keeps areas further to the east in the lower 40s.
1056 AM MST Thu Dec 14 2017 Webcams and surface observations indicate patchy freezing fog is persisting in the Southwest MT valleys. Decided to extend the freezing fog advisory until 2 PM this afternoon since the fog should dissipate via daytime heating over the next several hours. As the sun rises, webcams have revealed the presence of freezing fog in the valleys of Beaverhead County. Thus, added this county to the freezing fog advisory in effect until 11 AM this morning. Also decided to extend the freezing fog advisory for parts of Southwest MT until 11 AM this morning. Jaszka High pressure building aloft will provide mostly sunny skies for the area today. A cold front arrives Friday night with chances for accumulating snow.
/issued 1016 AM EST Thu Dec 14 2017/ High pressure that was in the western Gulf of Mexico yesterday has tracked east and is now located over southern Florida. In addition to increasing moisture with a southerly wind, the temperatures will be on the rise today as well reaching into the low 70's which is average for this time of year. High pressure has moved south of Florida which will be producing a southwest wind flow over the coastal waters for the next couple of days.
Surface ridging building into the lower Ohio Valley and western reaches of the Appalachians will keep light upslope flow in place through much of the night as low-mid level moisture remains trapped beneath a subsidence inversion. Surface ridging nosing in from the southwest later in the day will keep winds southwesterly and preclude a significant change in airmass.
1033 AM MST Thu Dec 14 2017 UPDATED AVIATION As the sun rises, webcams have revealed the presence of freezing fog in the valleys of Beaverhead County. Thus, added this county to the freezing fog advisory in effect until 11 AM this morning. Also decided to extend the freezing fog advisory for parts of Southwest MT until 11 AM this morning. Jaszka High pressure building aloft will provide mostly sunny skies for the area today. A cold front arrives Friday night with chances for accumulating snow. Patchy freezing fog and associated CIGS/VSBY down to LIFR should dissipate by 20Z/Thur in SW MT valleys.
1042 AM CST Thu Dec 14 2017 Cool high pressure is building into the region. As a result temps should remain in the lower and mid 40s north of I-40. to the low and mid 40s where a light breeze was being observed. Thus CAA along with cloud cover seen advancing south will keep high temperatures in the lower to mid 40s in the north. Cooler weather and lighter winds will help give the region a break from fire danger.
1120 AM EST Thu Dec 14 2017 A pair of low pressure systems will pass to the north of the area through Friday. Weak low pressure develops off the coast Friday, then tracks northeast while staying offshore Friday night.
The upper flow pattern over the next couple of days looks very similar to the past few days providing northwest flow over northeast Montana given an adjacent ridge to the west and trough to the east. Clear skies will be more likely further west closer to the influence of the upper ridge. The upper ridge axis will shift east and extend into northeast Montana on Friday.
303 PM CST Thu Dec 14 2017 Wv imagery this aftn shows entrenched upper ridge over the wrn CONUS and trof axis extending from Baja all the way ne into the Great Lakes region. Swwd extension of the trof tapping into Pacific moisture, transporting it newd into much of TX/LA.
227 PM CST Thu Dec 14 2017 (Tonight and Friday) Cold front that pushed across the area overnight has brought cooler conditions to West Central Texas, with temperatures mainly in the mid and upper 50s. A veil of high clouds will continue to stream across the I-10 corridor and this will keep temperatures from completely bottoming out, but its still gonna be a cold night with temperatures near freezing for many locations.
Conditions today through most of Friday will continue cloudy with patchy fog in the lower valleys, and mild and dry at higher elevations. A north Pacific cold front will pass through eastern Oregon Friday evening and western Idaho Friday night.