Aikyam-Lab/Synoptic-Bench huggingface dataset:
330 AM PDT TUE JUN 21 2016 High pressure aloft will gradually weaken today and Wednesday. As the onshore flow increases, the marine layer will slowly deepen this week and that will mean cooler weather west of the mountains. The weakening high and an increase in high clouds will also bring slightly cooler weather to the deserts today.
223 AM CDT TUE JUN 21 2016 A mid level ridge will maintain hot and dry weather the next couple days.
400 AM EDT TUE JUN 21 2016 A cold front will move through through the region Today. A secondary cold front will approach late tonight and cross the region Wednesday.
148 AM EDT TUE JUN 21 2016 A cold front will sink south across the area overnight and weak high pressure will build over the region tuesday.
Synoptic pattern features a strong upper ridge over the Four Corners region, with falling heights over the eastern Great Lakes and New England, resulting in a faster NW flow starting to dive across the Ohio Valley. Storms will diminish in the early evening hours, but another MCS is likely to develop over Iowa and/or NE Missouri, and then ride SE along the warm front. Precip shield will push east on Wednesday morning, so will have the higher POPs over the Bluegrass while areas west of I-65 start to dry out. By afternoon, we'll just be carrying a 20-30 POP as the warm front will be solidly to our north and east.
1209 AM CDT TUE JUN 21 2016 A cold front stretched from northwest IL across northwest MO into northern KS at mid afternoon. Very high freezing levels and steep low level lapse rates suggest the primary severe weather threat will be damaging winds. Glass The cold front should be drapped from northern KS across northwest MO into southern IL at 12z Tuesday, and will be quasi-stationary at that point. The combo of a low level thermal ridge with H85 temps of +22/24 and southwesterly low level flow supports high temps well into the 90s with metro St. The cold front will begin moving back southward into the area late Wednesday night and there may be a little if any convection along the front in our CWA.
In the wake of this now-defunct system, 500 mb high pressure centered over the Four Corners region will re- center over the Gulf Coast states, all the while remaining dominant over Deep South Texas and the Rio Grande Valley. Dry weather will prevail across the BRO CWFA due to the proximity and oppressiveness of this high throughout the short term forecast period.
630 AM EDT TUE JUN 21 2016 A cold front will drop south of the Ohio River today. The front is forecast to lift back north on Wednesday as a warm front ahead of low pressure developing to the west. Severe weather is expected Wednesday afternoon into Wednesday night when the low will be tracking across northern Illinois and Indiana to Lake Erie.
228 AM CDT TUE JUN 21 2016 The latest surface analysis depicts a cold front extending from Cleveland to St Louis and on into central MO using winds and pressure to determine location. The Pennyrile region will have the highest risk of severe with that area in slight risk of severe.
355 AM EDT TUE JUN 21 2016 With a cold front having moved through overnight, much cooler temperatures are expected today.
332 AM EDT TUE JUN 21 2016 Scattered showers and thunderstorms are expected part of today with the approach and passage of a cold front. Building ridging should then maintain dry weather through part of Wednesday. Shower and thunderstorm chances are expected to return late Wednesday with the approach of a warm front.
646 AM EDT TUE JUN 21 2016 A cold front will finish crossing the local area this morning. Weak high pressure will build over the area through Wednesday.
High pressure at the surface and building high pressure aloft will provide dry conditions with increasing temperatures through Wednesday. High temperatures today will range from the mid 80s coast to the lower 90s inland. Highs on Wednesday will be hotter as upper ridge strengthens and winds become sw. Temperatures will reach the upper 80 coast to the low/mid 90s inland.
426 AM CDT TUE JUN 21 2016 Upper level ridge centered across the Four Corners region continues to dominate the short term forecast. As the ridge starts to deamplify and shift eastward tonight and Wednesday, upper level flow becomes light and more westerly. Thermal ridge axis at 850mb also moves east, and high temperatures on Wednesday will be reminiscent of last week's heat as highs reach the low 100s across a majority of the Panhandles.
The incoming trough has already produced a line of showers from Thompson Falls to Olney and Polebridge early this morning.
411 AM EDT TUE JUN 21 2016 A cold front will drop south of the Ohio River today. The front is forecast to lift back north on Wednesday as a warm front ahead of low pressure developing to the west. Severe weather is expected Wednesday afternoon into Wednesday night when the low will be tracking across northern Illinois and Indiana to Lake Erie.
200 AM EDT TUE JUN 21 2016 Cold front crosses Tuesday. Warm front Wednesday.
Currently, air temperatures in most Keys island communities remain steady in the lower 80s, with dewpoint temperatures in the lower to mid 70s. Steady fresh east breezes prevail across most of the service area, thanks to a subtropical ridge finally having set up across the southeastern United States, placing southern Florida essentially in the trade- wind belt. Ridging at both the surface and aloft will remain north of the Florida Keys, keeping the area in a deep easterly flow. A high pressure ridge will persist over the southeastern United States today.
The upper ridge axis shifts east today, so the onshore winds become more persistent. Little change in the overall weather pattern is expected on Tuesday as the subtropical ridge axis remains the dominant weather feature across the region.
333 AM EDT TUE JUN 21 2016 High pressure aloft will begin to erode on the eastern side.
Winds will pick up again on Tuesday, but will be considerable weaker than today as the low over Hudson Bay lifts farther ne into Quebec as it weakens allowing the resulting pressure gradient over our area to slacken. As for temps, weakening winds and drier dew points will lead to much cooler min temps tonight. Highs on Tuesday will generally be in the upper 60s to mid 70s with slightly cooler readings near the Lake Superior shoreline in a continued w-nw flow.
An area of showers and storms are moving southward across the Ohio River Valley ahead of an approaching cold front.
650 AM EDT TUE JUN 21 2016 A cold front will move through through the region Today. A secondary cold front will approach late tonight and cross the region Wednesday.
343 AM EDT TUE JUN 21 2016 A cold front will move down from the Upper Great Lakes overnight and become nearly stationary near the Maryland border on Tuesday. High pressure should make Wednesday dry.
This will help lower daytime temperatures several degrees, but staying above normal as an upper high remains centered over the four corners.
343 AM EDT Tue Jun 21 2016 Behind the cold front cooler and dryer air will move in over the North Country. The overnight lows will continue to drop into the low to mid 60s but with high 50 low 60 dewpoints it will still feel somewhat muggy by North Country standards.
Rather strong cold front (for June standards) has made progress into far NW Kansas this afternoon, with NE winds and cooler/drier air across Nebraska. Unfortunately, this refreshing airmass will not make it to SW Kansas, with the cold front boundary stalling out this evening just north of the I-70 corridor. Weak cold front slips into SW KS, and bisects the CWA by evening. Prefrontal warming and compression on SW winds expected to heat the lower elevation SE zones into the triple digits Wednesday afternoon.
640 AM EDT TUE JUN 21 2016 With a cold front having moved through overnight, much cooler temperatures are expected today.
Upper low pushing inland this morning and is over the Puget Sound as of 1 AM. Strongest synoptic lift will remain to our north, but will see an increase in winds late this morning as a dry cold front advances through Idaho.
351 AM CDT TUE JUN 21 2016 Strong upper high centered over the southern Rockies this morning. On Wednesday, upper high will move east and will be centered over the arklatex region.
The upper level ridge over the southwestern CONUS will remain the driver of the regions weather today and tonight. Some models do attempt to develop convection south and west towards Nevada to Versailles but thinking the dry air in place and the orientation of the ridge with the lack of any noticeable short waves will make the chance for this to occur limited at best. The ridging will allow temperatures to climb into the lower to middle 90s. Convection should again develop tonight across northwestern through central Missouri but remain north and east to the Ozarks once again as the upper ridge remain over the area. Night time lows will only cool into the lower to middle 70s. Wednesday will see a slight amplification in the ridge pushing the track for convection to the northeast.
245 AM CDT TUE JUN 21 2016 Blow off mid to high clouds from convection occurring across Missouri with a back door cold front will continue to spread across the Mid-South over the next couple of hours. If the clouds hang on a good part of the day, it could keep highs a tad cooler as well as limit any pop up diurnal convection. Expect the best chance for rain will occur across portions of West Tennessee this afternoon from convection that develops ahead of the approaching back door cold front. The front will make it as far south as Western Kentucky this evening before lifting back to the north as the upper ridge strengthens over the Mid-South. The ridge also should be strong enough to prevent any diurnal convection from developing.
304 AM CDT TUE JUN 21 2016 The upper level ridge over the southwestern CONUS will remain the driver of the regions weather today and tonight. Some models do attempt to develop convection south and west towards Nevada to Versailles but thinking the dry air in place and the orientation of the ridge with the lack of any noticeable short waves will make the chance for this to occur limited at best. The ridging will allow temperatures to climb into the lower to middle 90s. Convection should again develop tonight across northwestern through central Missouri but remain north and east to the Ozarks once again as the upper ridge remain over the area. Night time lows will only cool into the lower to middle 70s. Wednesday will see a slight amplification in the ridge pushing the track for convection to the northeast.
420 AM EDT TUE JUN 21 2016 With a cold front having moved through overnight, much cooler temperatures are expected today.
A cold front will cross the area today. Cold high pressure will build into the region for the end of the week. Moisture will return over the weekend ahead of another cold front. An area of low pressure along the boundary over the southern Midlands and CSRA will move east early this morning. Lows will range from the lower 40s north to the lower 50s south. A cold front currently located over the Appalachian region will move into the forecast area this morning and push east by this afternoon.
A warm front will lift north across the region late tonight through Wednesday, ushering a mild and increasingly moist airmass northward into the area.
312 AM CST Wed Dec 14 2016 Cold Canadian high pressure was building over extreme southeast Kansas and the Missouri Ozarks this morning, forcing a cold front through the region. Cloud cover south of the front was also helping the cause for warmer temps.
1147 PM CST Tue Dec 13 2016 cold front moving through the south and eastern fcst area. Upper low currently rotating around northeastern Manitoba will dig further southeastward into Ontario tonight. Satellite loops show a fair amount of mid and high clouds upstream near the cold front. The center of the high will remain to our south and west throughout the day so we will continue to have a decent gradient and breezy northwest winds. The center of the surface 1035 high pressure cold dome slides from the western Dakotas into eastern Iowa during this period with the mid week periods coldest air settling out for early Thursday morning.
There may be a small chance for showers to develop across the far northern CWA toward sunset and into this evening as the frontal moisture band reaches Lake/ Volusia Counties, however surface convergence will continue to weaken as the front becomes increasingly diffuse, with WNW to NW flow beginning to bridge the boundary prior to sunrise. Maxes will reach the lower 80s across all areas, with overnight lows in the lower 60s.
Eventually this boundary surges south again behind the weak to moderate wave moving up out of the lower Mississippi Valley. Clearing skies, dry air and another surge of cooler air as the upper flow finally turns a bit northwesterly will bring cooler lows tomorrow night.
105 AM EST Wed Dec 14 2016 Low pressure will move northeast of the area overnight, with a cold front moving through Wednesday morning.
308 AM CST Wed Dec 14 2016 An arctic cold front has pushed through the Mid-South and is now located across Central Mississippi. Expect highs ranging from the upper 30s near the MO/AR and KY/TN border to the lower 50s in Monroe County, Mississippi. Lingering clouds will clear during the evening hours as arctic high pressure builds into the area.
1058 PM MST Tue Dec 13 2016 Satellite imagery says it all: dreary and dull as high clouds kept out the sun and kept temperatures slightly cooler than normal for much of the day. The jet will be shifting northward while vorticity maxima also appear to be on the low side. The Grand Mesa will see some accumulation too but amounts look to be on the low side - future shifts should keep an eye on how things pan out there. A trough will come ashore over the west coast and it's northeast to southwest orientation will allow the system to tap into some decent moisture from the Pacific Ocean.
Generally continued the scenario of the MVFR to isolated IFR ceilings spreading northward overnight and remaining largely in place until the next cold front passes tomorrow afternoon and evening.
1244 AM EST Wed Dec 14 2016 The coldest air of the season will move in tonight and it will get even colder by Wednesday night as another Arctic cold front pushes through the region.
/Tonight through Wednesday/ Fairly quiet initially in the short term, with skies expected to be clear this evening and winds diminishing with high pressure across the area situated off to the southwest of the CWA. Late tonight into early Wednesday another surge of cold air to move through the state behind a cold front associated with the main upper low spinning over central Canada. Sfc pres gradient tightens up quite a bit toward mid-day Wednesday, with momentum transfer with CAA expected to bring higher winds from the lower levels down to the surface as well.
158 AM EST Wed Dec 14 2016 Satellite view from west to east across the nation shows a mid level ridge over Baja Mexico building northward with a swath of very moist air moving over the Pacific Northwest. A trough lifting across the Deep South with the parent low over Hudson Bay, with a front stretched across the northern Gulf of Mexico. High pressure is still in control over the Florida Keys.
351 AM CST Wed Dec 14 2016 A cold front, located across northeast Colo and the KS/NE state line at 3 am, will make steady progress south today and be on the doorstep of the forecast area around noon. Cold, dry surface ridging will build into the area tonight with diminishing winds. Any saturation of the air mass looks like it will be confined to a narrow layer around 850 mb and with the very dry air present below this layer, we've delayed the onset of any patchy freezing drizzle mention until 09 UTC/3 AM, and we don't expect any accumulations.
/issued 145 PM CST Tue Dec 13 2016/ Upper low over Canada with trough extending down across the Mississippi River Valley as upper ridging builds across the West.
311 AM CST Wed Dec 14 2016 The overall synoptic pattern will be very similar to yesterday with negatively tilted surface ridging building to the NW of the CWA and at 140-160 kt jet just north of the state. This ridge and associated 1036 mb high will build eastward today and tonight and be positioned over the southern Missouri River Valley by 12Z Thursday. Trended highs for today a couple of degrees cooler than the previous forecast (and lower than most guidance solutions) given this influx of cold air and factoring in how highs yesterday only reached to between 23 and 28 degrees.
18Z surface data has cold high pressure along the Nebraska/Iowa border with a weak boundary across the Dakotas. The combination of the clouds and the high moving into the Ohio Valley will allow temperatures to first stabilize and then slowly rise the remainder of the night.
1102 PM CST Tue Dec 13 2016 Drier air in the low levels beginning to work its way down out of Central Arkansas and is knocking on the door of the TXK/ELD terminals. /issued 1013 PM CST Tue Dec 13 2016/ Reinforcing cold front is fast approaching the I-30 corridor as of 04Z this evening with freezing temperatures behind it across much of Oklahoma. The cold front that preceded this one is now down near the Gulf coast of with all precipitation well south of our region across SE LA. So have removed pops for the remainder of tonight but expect cloud cover to persist, and this will likely hold temperatures a bit higher despite the stronger cold front near bearing down on us.
Given the generally light CAA/mixing the low clouds may not clear until late morning/early afternoon hours.
By Wednesday high pressure will be nosing in from the northwest with breezy morning winds diminishing during the day.
Subjective 12Z upper-air analysis indicates upper-level trough digging into the central US, with a developing upper low off the Pacific Northwest.
12z GFS/NAM indicate upper level trough digging over the Upper Midwest/Great Lakes Region. and surface pressure gradient tightens behind surface cold front across the forecast area Wednesday afternoon. With the upper level trough digging over the Upper Midwest.
Expect breezy conditions Thursday as a cold front approaches.
Temps across the area only in the lower to mid 20s. Most of the central/eastern portions of the CWA are still under influence of strong surface ridging w/ western zones seeing some light southerly winds.
As decent cold advection continues behind the cold front, we are likely to finish out this afternoon in the mid/upper 20s over central Kansas to around the mid 30s in extreme southwest. Surface winds may swing to the south only briefly before another reinforcing surface cold front pushes in from the northwest tonight. With an overall lack of temperature tendency, models only bring highs to around the freezing point Wednesday afternoon.
1015 PM CST Tue Dec 13 2016 Given continued stronger winds associated with the reinforcing cold front tonight, expanded the Wind Chill Advisory to just about all of western and central North Dakota with this update through 18 UTC Wednesday. Temperatures have recovered nicely this afternoon, especially over the far southwest where readings were in the lower teens. Once again tonight we will see wind chills of 25 to 35 below zero across most of the forecast area as a cold front drops south through the night. Not a strong cold front but significant pressure rises will keep winds up through the night.
mainly into the low 30s and low 40s. Clear skies and much colder conditions can be expected Thursday as the arctic high pressure settles overhead.
331 AM CST Wed Dec 14 2016 (Today and Tonight) A backdoor cold front will move into the Big Country this afternoon and through the rest of West Central Texas this evening. Temperatures will range from the low to mid 50s across the Big Country (where the cold front will move through earlier), to the 60s across much of the rest of the forecast area. Temperatures overnight are forecast to steadily fall behind the front, dropping to near or below freezing across mainly the Big Country early Thursday morning. As temperatures drop to near or below freezing across portions of the Big Country Thursday morning, freezing drizzle will be possible. At this point, travel impacts look to be minimal, although a few slick spots may develop, especially on bridges and overpasses.
quiet evening across the forecast area as high pressure ridge centered near Great Falls is producing mostly clear skies, except over far southwest MT where a ribbon of dense jet stream cirrus clouds are aligned from northwest Beaverhead County to southern Gallatin County. Not expecting any precipitation in our region tonight other than a few very isolated, light snow showers over the higher terrain in southern Lewis & Clark County and western Jefferson County.
/issued 218 PM CST Tue Dec 13 2016/ The main impact in this forecast is going to be the arrival of an arctic front this weekend, bringing freezing temperatures, a chance of winter precip, and some fire weather concerns. Temperatures toward early morning will be low enough to allow for some freezing drizzle as well.
353 AM CST Wed Dec 14 2016 Quiet weather this early morning as a cold front continues to work its way off the coast. Right now based on the cloud cover, we will see afternoon temperatures 10 to 15 degrees cooler than what we saw yesterday. As high pressure builds over the region today and tomorrow, we will see more seasonable temperatures and dry weather.
Cold front moving through the area resulted in some light rain, briefly mixed with a few snow flakes in northern counties early this afternoon. High pressure then builds in for tomorrow with a secondary shot of cold air surging in tomorrow night into Thursday.
A cold front has moved through South Texas during the overnight hours. A reinforcing surge of high pressure will arrive tonight into early Thursday morning. Cloudy and slightly cooler conditions will be common across the region on Thursday with highs only in the lower 60s.
1149 PM EST Tue Dec 13 2016 A cold front will cross the region overnight through early Wednesday. High pressure will cross the region later Wednesday. An Arctic cold front will cross the area Wednesday night through early Thursday. High pressure will move in behind the front during the day Wednesday. A weak low pressure system will then approach from the west late Wednesday.
346 AM EST Wed Dec 14 2016 High pressure and a very cold airmass will move in today.
943 PM MST Tue Dec 13 2016 Upper level analysis has giant closed low over central Canada with broad trof across much of the CONUS. At the surface, arctic high pressure dominates with temperatures in the teens to around 20 degrees at 2pm. Low-level trof will begin approaching the region Wednesday night. Deep arctic trough will remain in place over central Canada through the weekend, with active southern periphery flow persisting.
/issued 346 PM CST Tue Dec 13 2016/ (Tonight and Wednesday) Overnight lows will be near ten degrees colder than last night after a cold frontal passage earlier today. Morning low temperatures for the northern half of the forecast area will be in the low to mid 30s, with upper 30s in the southern half of the area. Another weak cold front will move into the area tomorrow afternoon, reaching the I-10 corridor by late afternoon. High temperatures will reflect the position of the cold front with highs in the low to mid 50s over the Big Country and northern Heartland and mid 60s over the southern portions of the forecast area.
1023 PM CST Tue Dec 13 2016 South to southwest winds at 10 knots or less will give way to north winds after sunrise as a cold front moves through. A cold front will move through Wednesday morning switching the winds around to the north at around 15 knots. /Issued 505 PM CST Tue Dec 13 2016/ The next cold front is slated to move across the Oklahoma and Texas Panhandles on Wednesday with cooler temperatures in its wake. Moderating temperatures are anticipated for Thursday as a leeside sfc trof of low pressure begins to develop with breezy south to southwest winds.