Aikyam-Lab/Synoptic-Bench huggingface dataset:
1200 AM EDT Sat May 24 2025 - Drier Saturday and Sunday with temperatures in the low 60s. Another cool and cloudy day has emerged across SE Michigan, as departing low pressure merges with another low off of coastal New England. Several vorticity maxima are embedded on the western flank of this low, with one of these features pivoting across the Thumb at issuance. A similar day is expected on Saturday as low level moisture continues to be trapped in the lowest 5. Over the next 24 hours, a second PV maxima will break away from the parent upper low and retrograde to the upper Midwest.
850 PM PDT Fri May 23 2025 Cooler with more widespread night and morning low clouds and fog this weekend. Expect clouds to fill in across the coastal basin overnight as an upper level low moves into So Cal and helps deepen the marine layer. Based on the 00Z sounding and pilot reports the cloud deck is only around 500 ft thick, though the passing trough and coastal eddy could deepen it enough for at least patchy drizzle early Saturday morning. A secondary weak short wave through the mean trough Sunday morning could produce another round of patchy drizzle. Otherwise it will be cool this weekend with highs around 3-7 degrees below normal inland on Saturday, followed by a couple degrees of warming on Sunday as a transitory ridge builds in behind the departing upper low.
A little cooling is in store for today as thickness values decrease in response to a dry trough of low pressure developing across the southern half of California.
150 AM EDT Sat May 24 2025 Upper level low will continue to spin overhead with cool and unsettled weather through Saturday. same story, as an upper level low continues to spin over the Northeast U. Conditions will remain cool and damp, however, shower chances will decrease Saturday as the upper low slowly drifts east into Nova Scotia. Temperatures will be slightly warmer, with a few valley spots climbing into the upper 50s, but overnight lows will dip into the low to mid 40s. Upper level low finally lifts east on Sunday with another low approaching the region from the Great Lakes. Temperatures overnight fall into the low to mid 40s across the region.
256 AM EDT Sat May 24 2025 Low pressure moving to the Maritimes will bring a few showers at times and cool temperatures today.
727 AM EDT Sat May 24 2025 Low pressure moving to the Maritimes will bring a few showers at times and cool temperatures today.
630 AM EDT Sat May 24 2025 Cool and dry high pressure will build from central Canada over the Mid Atlantic region into Sunday.
EDT Sat May 24 2025 A low pressure system is currently located in New Brunswick and is expected to gradually weaken and move east across the Maritimes through the weekend.
558 AM CDT Sat May 24 2025 (Today through Sunday) - Heat Advisory in Effect Today from 1 PM - 7 PM - Moderate to Extreme Risk of Heat-Related Impacts (level 2/4 out of 4)today and Sunday High pressure will be in control of the forecast for this weekend leading to clearing skies and increasing temperatures.
504 AM EDT Sat May 24 2025 A low pressure system is currently located in New Brunswick and is expected to gradually weaken and move east across the Maritimes through the weekend.
658 AM EDT Sat May 24 2025 - A few sprinkles with perhaps a couple isolated showers over the Thumb in store for today and Sunday with gradual warming, into the low 60s.
Slightly warmer today but still several degrees below normal. Discussion: Dry weather is expected today and tonight as high pressure remains centered over the Eastern U. Only slightly warmer today but sunny skies and light winds should help with the chill.
Temperatures during the predawn hours were starting out in the lower 20s to around 30 degrees. Near the surface, high pressure will slide into New England with a strengthening low over the Srn Plains resulting Srly winds Monday into Monday night. Synoptically, NW flow was in place aloft between a deamplifying upper ridge centered near the Rockies and an upper trough invof of New England.
(Today through Monday) Skies are crystal clear early this morning with crisp temperatures ranging from the lower 20s in the extreme NE to the mid 30s in the SE. NW winds aloft today on the backside of an upper trough along the E Seaboard of the U. At the surface, a high pressure ridge from the E Great Lakes to the central Gulf Coast will shift E by Monday and extend from New England to N GA. An inverted trough is forecast to sharpen off the FL and GA coasts.
(Today through Monday) Strong high pressure centered just north of the Great Lakes is affecting the weather over a broad area, including Middle Tennessee.
The Northern Plains sits under zonal, westerly flow with sfc lee trough stretching from southern AB into northeastern CO.
Although upper heights are lowering, the low levels remain rather warm with record or near record highs continuing through Christmas Eve. This will be changing later today as the high level cloud cover over srn CA moves across the area. An upper level trof moving thru the Great Basin and 4 corners area on Christmas day will bring cooler temperatures to the area along with a chance of snow showers to the White mountains.
The next trailing trough is moving ashore along the PacNW Coast, and should be bringing increased moisture by this evening to western WY. This snow will continue into the day Monday as the trough moves through before decreasing Monday evening. Unfortunately for a pattern like this, getting any moisture over the mountain ranges into the central WY plains will be unlikely, and will also be counteracted by westerly downsloping bringing warmer temperatures. The system will help bring down temps somewhat, but highs still reach the 40s, with some localized warmer temperatures just off mountain ranges.
Highs today will climb into the low to mid 50s inland to upper 50s along the coast. Lows Monday night will be in the low to mid 30s inland to mid/upper 40s along the coast.
- Slightly cooler temperatures and next chance for moisture arrives late on Christmas Day and continues into the 26th. Good amount of sunshine through early to mid aftn, westerly component to low level flow, and approaching (albeit weak) cold front all suggest potential for temps, wind, and RH to possibly overachieve a bit, mainly W of the Tri- Cities.
632 AM EST Sun Dec 22 2024 (Today through Monday) Model consensus keeps broad high pressure in place across the region with relatively dry and cooler air persisting over SoFlo today. Meanwhile, ensembles and global solutions depict a trough/low complex moving away from the NE CONUS. But the more tangible difference will be felt tonight when overnight lows should remain 8-10 degrees warmer than the previous night (staying in the upper 50s to mid 60s).
Early morning surface analysis had a >1032mb high centered over the Great lakes region and ridging southwest back across the lower Mississippi valley. Despite near full insolation today, continued caa will hold temperatures in the low to mid 50s at most locations.
Observations in Montana indicate a dry airmass in place just off the surface and this seems to be limiting any freezing rain in that area so far. 01 inch or more of freezing rain is 5-15 percent from Valley City to Wahpeton to Fergus Falls. Will message in HWO and also continue a low chc freezing rain graphic and tailor it for the WPC prob area 10-15 pct in far southern fcst area.
Fortunately, warmer surface temperatures and drier conditions are keeping the risk of freezing rain nearly zero (although that changes drastically across northeast MT). The only areas that contain a remote risk of some light freezing rain are Miles City through Baker, but even then the probably of any amount of it occurring is under 10%. Monday sees a quick ridge build over the area and keep warm conditions present.
621 AM EST Sun Dec 22 2024 Dry through Monday under high pressure, with a milder afternoon on Monday.
613 AM EST Sun Dec 22 2024 High pressure will build in from the west today and tonight and crest over the area Monday.
A high pressure axis over central Ohio this morning will move east and away from the region, with a southerly flow taking its place.
Cooler and more seasonable start to Christmas Week. Winds may gust to 20-35 mph for counties along the Nebraska border if the center of the lower pressure can shift southeast fast enough. For the beginning of Christmas week, a pseudo zonal/northwest flow upper pattern is forecast over the High Plains as a weak trough tries to develop ahead of a ridge over the Rockies.
(Today through Monday) A very broad and strong high pressure system is centered over the Great Lakes and expands through the Gulf of Mexico and well into Canada. The center of the high will slide east through Monday. We may see an inverted trough set up due to this easterly flow, with only some slight increase in clouds across the east/southeast Monday afternoon.
- Drier and warmer conditions expected behind the early week system for Christmas Eve and Christmas Day. RAP/surface analysis early this morning shows high pressure centered over the eastern Great Lakes Region. Currently, ground-based obs across the area are reporting temperatures in the low teens with some single digits across the central interior. Another trough moves into the plains 12z Tue and this affects the upper Great Lakes 00z Wed. The trough over the Rockies ejects into the southern plains 12z Thu. Models get back into better agreement 12z Sat with a deep trough in the central U. NBM was way too high with pops as warm front was well to the south.
918 AM EST Sun Dec 22 2024 High pressure will be in control through Monday.
- Several chances for precipitation remain possible this week with a series of frontal systems, including a low chance (20%) for patchy freezing drizzle late tonight into early Monday morning.
Have a wonderful Sunday morning! (Today through Monday) Model consensus keeps broad high pressure in place across the region with relatively dry and cooler air persisting over SoFlo today. Meanwhile, ensembles and global solutions depict a trough/low complex moving away from the NE CONUS. But the more tangible difference will be felt tonight when overnight lows should remain 8-10 degrees warmer than the previous night (staying in the upper 50s to mid 60s).
540 AM CST Sun Dec 22 2024 (Today through Monday) Broad upper trough along the Atlantic Coast, with ridging extending from Baja California to eastern Montana. At the surface, high pressure was centered over the Great Lakes with the axis of a southward extension of that high over the Lower Mississippi River Valley. As the axis of the high pressure shifts to the east of the area later today, winds will gradually become easterly by late in the day, and then southeasterly on Monday.
408 AM EST Sun Dec 22 2024 (Today through Monday) Skies are crystal clear early this morning with crisp temperatures ranging from the lower 20s in the extreme NE to the mid 30s in the SE. NW winds aloft today on the backside of an upper trough along the E Seaboard of the U. At the surface, a high pressure ridge from the E Great Lakes to the central Gulf Coast will shift E by Monday and extend from New England to N GA. An inverted trough is forecast to sharpen off the FL and GA coasts.
430 AM CST Sun Dec 22 2024 - Very light precipitation remains possible (<20%) near highway 14 and then into southwest MN near and east of the Buffalo Ridge tonight.
We'l see an increase in clouds today with high temperatures remaining in the lower to mid 70s.
High pressure across the region this morning will continue to shift slowly east through this afternoon. This is due to the approach of a cold front. This will usher in warmer air with morning lows in the lower 20s and highs in the mid 30s.
Satellite shows a quiet sky above eastern KS and western MO tonight thanks in part to midlevel ridging across the Central Plains. Satellite imagery also shows a leeward trough deepening across the Northern Plains which drops a cold front across the central Plains.
620 AM EST Sun Dec 22 2024 Arctic high pressure will build across the region today.
Highs today will be in the lower to mid 60s with mild temperatures overnight.
705 AM EST Sun Dec 22 2024 High pressure covered much of the eastern United States this morning along with below normal temperatures. This high will move east today and offshore tonight with slowly moderating temperatures.
605 AM EST Sun Dec 22 2024 (Today and tonight) High pressure over New England will promote northeasterly flow today with mainly sunny skies expected again. Highs will still be on the cool side, ranging from the mid-50s across southeast Alabama and southwest Georgia to the lower 60s in the southeast Big Bend. Thus, have trended a bit warmer for lows tonight with upper 30s to lower 40s east of the Flint and Apalachicola Rivers with lower to middle 30s farther west where winds may go calm and skies remain mainly clear for most of the night.
448 AM CST Sun Dec 22 2024 (Today through Monday) A very broad and strong high pressure system is centered over the Great Lakes and expands through the Gulf of Mexico and well into Canada. The center of the high will slide east through Monday. We may see an inverted trough set up due to this easterly flow, with only some slight increase in clouds across the east/southeast Monday afternoon.
(Rest of today through Monday) High pressure remains well-established across the eastern United States including South Florida to close out the weekend and kick off the work week. Otherwise, conditions should remain generally dry and slightly cooler than average for this time of year.
- Meteorological Overview: Moisture wrapping around a low pressure system just off to the north in Canada has helped produce a wave of isolated, very light rain across North Central MT this afternoon. Better chances for widespread precipitation at lower elevations arrives with a more potent upper- level trough on Christmas Eve. Warmer temperatures will keep the precipitation type to mostly rain over the plains, with a rain/snow mix in the Southwest Valleys.
121 PM MST Sun Dec 22 2024 - Warm conditions today give way to a cooler and more seasonable start to Christmas Week. The north winds tonight will help move a colder air mass over the region bringing Monday's high temperatures into the low to middle 50s. Main focus continues to be the closed low moving through Christmas night.
Moisture wrapping around the low pressure system in Canada has a low chance to produce some sprinkles along the Hi-Line this morning.
1012 AM EST Sun Dec 22 2024 Cold, dry air will remain into Monday as Arctic high pressure moves across the eastern U. The high will move offshore late Monday as a coastal trough develops off the Southeast Coast.
200 PM EST Sun Dec 22 2024 High pressure will shift off to the east through tonight. With light winds, will undercut temperatures a few degrees again, especially across our east, closer to the ridge axis. Will range lows from the teens in the far east to the low/mid 20s in the west. The one concern would be if pcpn moves into our northwest fast enough Monday afternoon, as ground/pavement temperatures may still be below freezing since we are coming out of an extended cold period. As of now the METRo road model is showing pavement temps going above freezing by early afternoon in our north, shortly before any pcpn moves into the northwest.
Surface analysis this morning continues to show high pressure slowly sliding east of the Four State Region, allowing winds to shift to the SE. This is still expected to result in high temperatures this afternoon being slightly warmer than yesterday's; in the mid to upper 50s for most locations. With winds becoming southeast, temperatures to gradually warm areawide with highs today in the mid to upper 60s and above freezing overnight lows tonight in the mid 30s to mid 40s. On Monday, warming trend to continue with afternoon highs in the in the low to mid 60s areawide. Additionally, near zonal flow aloft ahead of an approaching trough across west Texas will allow for enough instability to support elevated isolated convection across southeast Oklahoma and northeast Texas by late Monday afternoon.
239 PM EST Sun Dec 22 2024 - Monday morning, freezing rain is expected for counties along the southern Michigan state line. - Elsewhere, a brief period of freezing rain or drizzle in the morning changes to rain.
1009 AM EST Sun Dec 22 2024 Strong Canadian high pressure builds in through Monday, with dry and very cold conditions.
(Tonight) The center of the area of high pressure settled over the Ohio Valley shifts east into the northeastern CONUS overnight. However, the southwestern portion of the high moves little.
1210 PM EST Sun Dec 22 2024 (Today and tonight) High pressure over New England will promote northeasterly flow today with mainly sunny skies expected again. Highs will still be on the cool side, ranging from the mid-50s across southeast Alabama and southwest Georgia to the lower 60s in the southeast Big Bend. Thus, have trended a bit warmer for lows tonight with upper 30s to lower 40s east of the Flint and Apalachicola Rivers with lower to middle 30s farther west where winds may go calm and skies remain mainly clear for most of the night.
1231 PM EST Sun Dec 22 2024 Dry through Monday under high pressure, with a milder afternoon on Monday.
A northwest flow persists over the region today as longwave troughing is over the offshore waters of the East Coast while broad ridging is over much of the Plains. High temperatures will range from the upper 40s far north and in the higher elevations east to readings in the mid 50s generally along and south of the U. High temperatures will range from around 50s across the higher elevations of the northeast to readings near 60 southwest.
112 PM EST Sun Dec 22 2024 High pressure will be in control through Monday.
1157 AM EST Sun Dec 22 2024 High pressure over Ontario Canada just to the east of Georgian Bay will drift to the east across the Adirondacks tonight. A weak area of low pressure at the surface and aloft will track north of the state Monday night into early Christmas Eve. Model soundings become mixed this afternoon to 900mb, where temps around -14C support highs ranging from the mid teens over the Mtns north of KIPT, to the upper 20s in the lower elevations along the Mason Dixon Line.
(Rest of Today) A large area of high pressure controls the weather over most of the eastern CONUS this morning. While, the center of of the high is located over the Ohio Valley region, the southwestern portion of this feature extends into northern Alabama and Mississippi. The good news is that we will not see the cloud cover we saw yesterday and with much weaker cold air advection today, warmer temperatures are expected. With a much more lax pressure gradient in place under the influence of the large area of high pressure, winds will be lighter today.
- Warmer Tues and Xmas, rain chances now dropped except for far NW where light rain possible.
1131 AM CST Sun Dec 22 2024 There are no surprises this morning with temperatures slowly rebounding through the 40s on the way to highs in the low/mid 50s under sunny skies. Early morning surface analysis had a >1032mb high centered over the Great lakes region and ridging southwest back across the lower Mississippi valley. Despite near full insolation today, continued caa will hold temperatures in the low to mid 50s at most locations.
Highs today will climb into the low to mid 50s inland to upper 50s along the coast.
238 PM CST Sun Dec 22 2024 - The risk of freezing drizzle tonight into Monday morning has gone down. - Warmer temperatures along with several chances for rain will finish out 2024 with very little sunshine. Forecast profiles of the atmosphere continue to suggest the potential for drizzle and/or freezing drizzle for roughly a 6 hour time frame from about 3 AM to 9 AM Monday morning. The further north track of the low center now would confine any freezing drizzle to the deeper snow field across the area; roughly Independence, IA to north of a Sterling, IL line. Compared to yesterday, the overall risk for freezing drizzle has gone down and now looks to be at a 20-30 percent chance.
Showers aren't amounting to much this morning and don't expect much for the rest of today as a weak upper level ridge passes. Temperatures will struggle to warm again today in the lower Snake Plain and sheltered valleys/basins of SE Oregon.
1211 PM EST Sun Dec 22 2024 Cold, dry air will remain into Monday as Arctic high pressure moves across the eastern U. The high will move offshore late Monday as a coastal trough develops off the Southeast Coast.
Surface analysis this morning continues to show high pressure slowly sliding east of the Four State Region, allowing winds to shift to the SE. This is still expected to result in high temperatures this afternoon being slightly warmer than yesterday's, in the mid to upper 50s for most locations.
A surface cold front/stationary front is analyzed from far SE MT/NW SD into south-central SD, with breezy NW winds across the area, strongest across the western SD plains. This trough is currently centered off the Pacific NW and will eject into the Northern Plains as a broad upper trough axis, centered from southern Canada southward into the Southern Plains.
342 PM EST Sun Dec 22 2024 High pressure over Ontario Canada just to the east of Georgian Bay will drift to the east across the Adirondacks tonight. A weak area of low pressure at the surface and aloft will track north of the state Monday night into early Christmas Eve.
Dry weather continues with slightly warmer temperatures tomorrow. This should result in slightly warmer temperatuers tomorrow, reaching the 45 to 50 range in most spots.
239 PM CST Sun Dec 22 2024 - There is a chance (25-50%) of light freezing rain this evening and and light freezing drizzle or snow overnight across northeastern SD into west central MN. An area of rain/freezing rain is happening out over western/central North Dakota. Precipitation type would be freezing liquid precipitation (surface temps at or below freezing). Issued an SPS for light freezing rain potential, should the area of forcing/lift aloft hold together long enough to bring light freezing precip potential toward this CWA this evening. Beyond the actual freezing rain potential this evening, remnant low stratus that moves into the region overnight may be deep enough, with enough weak lift within the cloud layer itself, to promote a few hours of freezing drizzle potential from roughly 09Z to 15Z Monday.
High pressure over the Gulf will interact with lower pressure upstream to maintain a modest southeast/onshore flow. Those temperatures are roughly 10 degrees above average for the lower RGV and 10 to 15 degrees above average for the upper Valley and ranchlands.
- Low chance (20%) of freezing drizzle north and east late tonight into early Monday.
- Several chances for precipitation remain possible this week with a series of frontal systems, including a low chance (20%) for patchy freezing drizzle late tonight into early Monday morning northeast of Lincoln.
There are no surprises this morning with temperatures slowly rebounding through the 40s on the way to highs in the low/mid 50s under sunny skies. Early morning surface analysis had a >1032mb high centered over the Great lakes region and ridging southwest back across the lower Mississippi valley. Despite near full insolation today, continued caa will hold temperatures in the low to mid 50s at most locations.
333 PM EST Sun Dec 22 2024 High pressure exits to the east as low pressure over the Upper Midwest enters the Great Lakes region.
1108 AM CST Sun Dec 22 2024 (Today through Monday) A very broad and strong high pressure system is centered over the Great Lakes and expands through the Gulf of Mexico and well into Canada. The center of the high will slide east through Monday. We may see an inverted trough set up due to this easterly flow, with only some slight increase in clouds across the east/southeast Monday afternoon.