Aikyam-Lab/Synoptic-Bench huggingface dataset:
A ridge of high pressure will bring dry and much warmer weather to the area today. Cloud cover will increase overnight, however, as a fast moving but weak and moisture starved cold front moves through the region. Winds will increase tonight, as the cold front moves through. The beginning of the extended features the exit of a passing cold front. This front is pushed across the Ohio valley by a low moving northeast across Michigan and the Great Lakes, supported aloft by a trough moving east over the same area.
Trough lifting north of the state tonight with a period of quiet yet chilly weather. High pressure migrating over the central Appalachians to the Eastern Seaboard will provide fair and dry weather through Sunday evening. A Low pressure is fcst to track across lower MI Sunday night and into southeast Canada on Monday, with trailing cold front pushing across the area early on Monday.
Isentropically induced forcing well ahead of the low pressure center would appear to be the primary snow generating mechanism over most of the area from Tue afternoon into the night. Wind induced impacts, at least for now, appear to be on the low side, more aligned with drifting as opposed to blowing; there's not much in our guidance pointing toward anything anomalously high. High pressure building over us Wed will then bring near seasonal temps our way from that point right through the end of the week.
High pressured situated over the mid Atlantic coast will roll off into the Atlantic and become stretched out in response to a digging trough moving towards the Saint Lawrence Valley. The weakening ridge will have less influence on the Keys, resulting in moderate northeast to east flow today and tonight. As the trough moves off into into Canada, a deep ridge will fill in behind, moving towards the Delmarva.
Thereafter delayed moisture return into this sys tempers a more potent precip response with primarily some light rain through the frontal scale circulation Sunday evening followed by some muted lake response primarily confined to srn MI tied to nwd confined low level thermal trough progression Monday. Thereafter substantial mid level ridging to commence across the ern US in response to sig deep layer troughing through the plains as competing strong nrn/srn stream wave disturbances intertwine and eventually phase into a major storm through the cntrl US midweek. Thereafter some likelihood exits for another substantial lake snow event pending track of leading upper trough sys and resultant flow trajectories that develop in wake of this intense sys.
The low level baroclinic zone has pushed south through much of the forecast area, while the cold pool at 500mb has sagged southward into northern Utah. A preliminary look at the 00Z guidance indicates the upper low is still on track to bring widespread snowfall across much of the forecast area south of I-80 late Sunday night through Monday.
Another very cold night is in store overnight with high pressure centered over the eastern half of our forecast area. Coldest readings will be over the FL Big bend and southern GA under the high with readings well down into the middle 20s expected. On Sunday real moderation begins as the high shifts east and some weak WAA begins. Expect highs almost 10 degrees warmer than today. Dry weather and a slow warming trend will continue as high pressure shifts east.
Still, models indicate there will be enough low level moisture and instability for some snow flurries as an associated cold front pushes south. High pressure will then settle in over the area on Monday, with sunny skies and light northerly winds becoming westerly. Main impacts for the period continue to be with the mid-week upper low passing through the area.
/Issued 233 PM EST Sat Dec 26 2020/ High pressure and dry conditions expected for much of the short term portion of the forecast. NListemaa A low pressure system will come out of the great plains on Monday, moving through the lower great lakes. This brings a mostly dry cold front down, but with little available moisture, PoPs remain pretty light with only a small chance for far northern GA.
1242 AM EST Sun Dec 27 2020 Cold high pressure will prevail through Sunday. A dry cold front will pass through the region Monday night, followed by high pressure into mid week.
Surface analysis this afternoon places a 1025 mb ridge of high pressure over Southern Alabama. This has brought sunny skies with southerly winds on the back side of high pressure advecting warmer air back into the Lower Mississippi Valley this afternoon. As of 2 PM CST, temperatures across the Mid-South risen into the lower 50s at many locations. Short term models indicate the aforementioned ridge of high pressure will move east over the next 24 hours. Lows tonight will be at least 15-20 degrees warmer than this morning with highs in the upper 50s to lower 60s on Sunday. The next cold front to affect the Lower Mississippi will arrive Sunday night into Monday morning as it drops down from the Middle Mississippi Valley.
Diffluence aloft will result in weak forcing producing periods of light snow late Sunday and Sunday night with several inches of snow possible over the higher terrain of the southern San Juan mountains. South to southwest winds will increase ahead of this system with strong gusty winds expected on Monday, especially over the higher terrain. Warmer air will also move across the southern valleys and will result in a changeover of any precipitation to rain on Monday with snow levels rising to near 7500 feet by the afternoon.
Expect overnight lows on Monday to be nearly 10 degrees warmer than this morning with lows mostly in the mid 30s away from the Gulf Coast and in the upper 30s near the coast.
Temperatures will be slightly warmer today with highs generally in the low to mid 20s. Tonight and into Monday, high pressure will build across the region with the cloud cover slowly decreasing.
On the Plains, a cold front will arrive late tonight with breezy conditions expected into Sunday morning. This will keep cooler air in place, with highs around 10 deg F cooler for afternoon highs. Highs will likely top out in the upper 40s to lower 50s on the Plains, while the San Luis Valley will only reach into the lower 30s. Monday is expected to be a little cooler than Sunday as the next upper-level low begins to approach our area. By late afternoon, an influx of moisture and warm air advection at the mid-levels will be sufficient to start producing snowfall over most of the higher terrain.
Forcing around this low has also developed some light precipitation which is largely south of the South Dakota border. The highest amounts should remain around the Turtle Mountains and the north central. Quiet weather continues into Monday as the cooler temperatures continue.
251 AM EST Sun Dec 27 2020 We close out the holiday weekend with a much warmer day.
A cold front will move across the region during the mid to late afternoon. A cooler airmass will spread southward into the region Sunday night and Monday as high pressure shifts southward from the Dakotas into the Ohio Valley.
Winds will also say breezy from Livingston to Big Timber through this morning but will decrease as ridging will build back into the area this afternoon. A cold front will drop south Monday, bringing another shot of snow showers to the far southeastern corner of Montana during the afternoon. Low temperatures will drop into the teens and even a few single digits across the lower elevation.
Mid-level ridging will develop over the area today and persist through Monday keeping us dry. South to Southeasterly flow will increase to moderate flow today, bringing more moisture and some warmer temperatures to the area.
At this point, not confident that the Highway 14 corridor will receive an inch as previously thought. Have had reports of light freezing rain around HON, with model soundings indicating temperatures around 850 mb hovering at or just above 0 C. The focus for precipitation remains primarily north of Interstate 90, where snowfall totals could approach an inch along the Highway 14 corridor by the end of the day, to just a few tenths south of that area. With colder air filtering into the region, highs today will be a touch cooler than yesterday - mid 20s to lower 30s.
We close out the holiday weekend with a much warmer day.
Temperatures are much warmer than 24 hours ago with observation sites sitting in the 20s and 30s instead of the teens with some high clouds moving through the area.
A ridge of high pressure will bring dry and much warmer weather to the area today. Cloud cover will increase overnight, however, as a fast moving but weak and moisture starved cold front moves through the region. Winds will increase tonight, as the cold front moves through. Aloft, zonal flow will give way to induced ridging as a major storm system takes shape to the west.
A gradual wind shift from south to northwest over several hours will occur today in association with the approach and eventual passage of a cold front. /Issued 313 AM CST Sun Dec 27 2020/ Mild temperatures precede the next cold front which will pass through the forecast area today, with another day of well above normal temperatures expected with the colder post frontal airmass lagging.
a low pressure system set to move into central California by tonight.
505 AM CST Sun Dec 27 2020 (Today and tonight) The main feature of the short term will be a cold front moving through this morning, bringing a wind shift to the north and slightly cooler temperatures (more significant cold air advection will be delayed resulting in larger temperature drops Monday).
(Today and tonight) An short wave trough will move east across the Central Plains today, sending a weak cold front south across the area during the afternoon and early evening hours. Colder air will lag the front, so expecting above normal temperatures across the area today, with sunny skies and highs ranging from the upper 60s across the Big Country, to the lower and middle 70s elsewhere.
543 AM CST Sun Dec 27 2020 (Today and tonight) An short wave trough will move east across the Central Plains today, sending a weak cold front south across the area during the afternoon and early evening hours. Colder air will lag the front, so expecting above normal temperatures across the area today, with sunny skies and highs ranging from the upper 60s across the Big Country, to the lower and middle 70s elsewhere.
514 AM EST Sun Dec 27 2020 Expect temperatures will moderate to near or above normal today ahead of the next cold front progged for Monday.
Have had reports of light freezing rain around HON, with model soundings indicating temperatures around 850 mb hovering at or just above 0 C. The focus for precipitation remains primarily north of Interstate 90, where snowfall totals could approach an inch along the Highway 14 corridor by the end of the day, to just a few tenths south of that area. With colder air filtering into the region, highs today will be a touch cooler than yesterday - mid 20s to lower 30s.
915 AM EST Sun Dec 27 2020 SE flow in place in the lower levels just off the surface through around 850mb bring some warm advection and clouds into the area. Still saw a good freeze/hard freeze this morning across the Nature Coast, but locations are now reporting above freezing across the area.
Some of this precipitation may fall as light rain as temperatures could be a few degrees above freezing in some pockets of the Sandhills. On Monday, a strong, positively-tilted upper level trough extending from Manitoba to southern California through the Intermountain West will cause flow to shift to the southwest in the central Great Plains. This trough is the focal point of the area's next weather system.
334 AM CST Sun Dec 27 2020 Today-Monday: A cold front is just starting to move into central KS at this time. Low temperatures tonight will drop a bit cooler, potentially offset in the west by clouds that will be on the increase just before daybreak.
At the surface, weak low pressure is located across central SD with a cold front currently dropping south through the area. Winds are beginning to pick up out of the northwest as the low departs and Canadian high pressure slides into the area. Some light freezing rain will also be possible across far south central SD early this morning. As high pressure quickly moves in, decent pressure rises will occur near peak heating today, which should allow for some breezy northwest winds across the SD plains, gusts to 35 mph are likely. Another compact upper trof will swing through the northern Plains overnight. Weak ridging crosses the northern Plains ahead of the next weather system to affect the area.
A mix of rain and snow is foreseen tomorrow morning with an approaching cold front. Previous Discussion: High pressure will keep the weather quiet today. Strong jet influence as this trough moves into the OH Valley will create a negative tilt creating more baroclinicity to the boundary and a tighter gradient. Moisture wise, the low seems to be lacking a bit and models have kept this trend. Temperatures will crash into the low 30s Monday afternoon and then into the lower 20s Monday night. The wind direction seems to go more west 270 than 290 so mainly accumulations will be in the north and along the higher terrain.
313 AM CST Sun Dec 27 2020 Mild temperatures precede the next cold front which will pass through the forecast area today, with another day of well above normal temperatures expected with the colder post frontal airmass lagging.
A cold front will drop SE into the state near the end of this TAF period. This will allow for increasing moisture ahead of an approaching weak cold front. with cooler temps expected for Mon afternoon.
SHORT TERM (Now through Monday): 500 mb ridging will steadily build eastward over the RGV during today and Mon. This combined with the strengthening 500 mb ridging will limit any significant pcpn chcs across the region through Mon. Will lean close to the warmer side of the short term guidance closer to the ECMWF numbers.
528 AM CST Sun Dec 27 2020 Today-Monday: A cold front is just starting to move into central KS at this time. Low temperatures tonight will drop a bit cooler, potentially offset in the west by clouds that will be on the increase just before daybreak.
235 PM CST Sun Dec 27 2020 Weather tonight and Monday will trend cooler though remain benign across the Texas South Plains region. RMcQueen An upper-level trough currently centered off of the US coast is progged to move east towards the area and deepen, driving a cold front east with it. Ahead of this next system, south to southeasterly surface winds will help to moisten the lower levels of the atmospheric column.
1017 AM EST Sun Dec 27 2020 Temperatures are rising into the lower to mid 60s this morning along the Florida Keys, significantly off the overnight lows that ranged through the 50s (and even upper 40s in a couple spots). Skies are partly cloudy across the Lower Keys and mostly sunny across the remainder of the Keys. High pressure and dry air aloft will result in a beautiful day with temperatures rising to near 70 degrees this afternoon. Moderate northeast breezes will prevail for the day, highest across the Florida Straits and portions of Hawk Channel adjacent to the Lower and Middle Keys. From synopsis: High pressure centered over the Mid-Atlantic coast will continue to slowly progress towards the east, moving over the Atlantic. As the high shifts east, breezes will become northeasterly today and tonight.
1122 AM CST Sun Dec 27 2020 Today-Monday: A cold front is just starting to move into central KS at this time. Low temperatures tonight will drop a bit cooler, potentially offset in the west by clouds that will be on the increase just before daybreak.
Mostly clear skies will allow for some of the fog to burn off by the afternoon, but the lower Treasure Valley will likely continue to see patchy fog through the afternoon.
High pressure along the east coast will continue to move farther offshore today, while a low pressure system tracks into the Great Lakes region. For East TN, a SW flow in the low to midlevels will warm temperatures into the 50s south and 40s north where snow cover will continue to suppress diurnal heating. Ridging will produce another dry day today with increasing 850mb and thickness moderating temperatures. For this afternoon and overnight, pressure gradient tighten as a fast moving system approaches the tennessee Valley and surface ridging remains east of the Appalachians. For tonight, good valley/ridge temperature variation. The southwest flow will keep ridge tops warm and sheltered/decoupled wind valleys being colder.
Gusty southwest winds will shift to northwest, and then eventually north tonight following the passage of a cold front. /Issued 1109 AM CST Sun Dec 27 2020/ A cold front is just entering the northwest corner of our forecast area at this tikme, and will sweep across the area this afternoon.
Areas of dense, freezing fog have developed across the northern Snake Plain this morning, per satellite trends and ITD webcams.
1007 AM EST Sun Dec 27 2020 High pressure over the southeast is set to move northeast off the Delmarva coast this afternoon. Expect overnight lows on Monday to be nearly 10 degrees warmer than this morning with lows mostly in the mid 30s away from the Gulf Coast and in the upper 30s near the coast.
Low temperatures earlier today were actually warmer than highs on Christmas Day.
Northerly winds around 5 to 10 mph will become northeast into the afternoon as high pressure north of the area shifts northeast.
213 PM EST Sun Dec 27 2020 High pressure ridge across central Georgia will shift slightly south overnight and Monday as a weak cold front approaches from the north and west. Upper level pattern is mostly zonal and high pressure ridge at the surface remains entrenched across south central/south GA.
A mix of rain and snow is foreseen tomorrow morning with an approaching cold front. High pressure will keep the weather quiet today. A trough, and its associated cold front, will enter our region Monday morning. With temperatures in the boundary level just above freezing, precipitation will start as rain. High snowfall amounts will stay focused in the ridges and north of Pittsburgh due to upsloping and close proximity to the lake; 1-2 inches may accumulate here.
1128 AM CST Sun Dec 27 2020 (Today and tonight) An short wave trough will move east across the Central Plains today, sending a weak cold front south across the area during the afternoon and early evening hours. Colder air will lag the front, so expecting above normal temperatures across the area today, with sunny skies and highs ranging from the upper 60s across the Big Country, to the lower and middle 70s elsewhere.
Have issued a winter weather advisory for southeast Nebraska and southwest Iowa as freezing rain has caused some icy road conditions. Progressive band of freezing rain/sprinkles should not drop more than a hundredth or two of ice, but road reports in southwest Iowa indicate hazardous driving conditions. Untreated roads and sidewalks will be most affected, along with bridges and overpasses. Precipitation should be east of the area by noon, with temperatures warming to or just above freezing.
2030Z radar loop shows last batch of light snow and freezing drizzle mainly along and east of the I-29 corridor. High pressure drifts across the region Monday with dry conditions and partly sunny skies. Winds will be light from the west- northwest with afternoon highs in the lower to mid 20s.
Low temperatures earlier today were actually warmer than highs on Christmas Day. Middle TN is in a zone of transition as a cold front will approach the area tonight. VFR conditions expected until the blotchy showers with the cold front move across the area.
Temperatures across the region will trend warmer overnight then they have the past couple of nights. As a result, overnight lows are expected to remain above freezing, bottoming out in the mid 30s to mid 40s across most of the area.
While it does, the associated trough will deepen and mid clouds will increase through the afternoon.
High pressure will reposition throughout the southeast US as a weak cold front dives through the Tennessee Valley into the southeast. The front will weaken and stall north of the area as the supporting mid level trough moves well into Canada. High temperatures Monday will warm into the mid 60s following overnight lows tonight in the low to mid 30s.
Temperatures were in the lower to mid 70s. Highs will be 55 to 65, possibly a few degrees cooler.
As the day progresses, a trof digs along the west coast and backs the flow aloft to the south.
132 PM EST Sun Dec 27 2020 Temperatures near to slightly above normal and dry conditions as upper ridging builds back into the region through early week.
255 PM CST Sun Dec 27 2020 This morning we observed warmer low temps across the area, as most sites were in the 30-40s and 50s observed at some locations. A weak backdoor cold front will move through the area this afternoon, temporarily shifting wind direction to the NE-E, then stall over the Pecos River.
238 PM EST Sun Dec 27 2020 High pressure is in place across the region. The high pressure center will shift off to the NE tonight and get reinforced from the north Monday night, keeping a general NE/E flow in place across the area.
258 PM CST Sun Dec 27 2020 Warm and breezy conditions continued ahead of a cold front that is on the western edge of the forecast area this afternoon. We expect temperatures to be 10 to 15 degrees cooler on Monday than they were today as northwest winds bring a cooler airmass into our area. An active week is expected with several rounds of precipitation as an upper level trough tracks slowly eastward from the southwest US into the Ohio Valley.
1013 AM EST Sun Dec 27 2020 Temperatures are a little slow out of the gate this morning within our cooler eastern valleys. A ridge of high pressure will bring dry and much warmer weather to the area today. Cloud cover will increase overnight, however, as a fast moving but weak and moisture starved cold front moves through the region. Winds will increase tonight, as the cold front moves through. Aloft, zonal flow will give way to induced ridging as a major storm system takes shape to the west.
Temperatures were in the lower to mid 70s. Highs will be 55 to 65, possibly a few degrees cooler. A cold front will move south across the area this afternoon with winds becoming west to northwest at the terminals.
High pressure along the east coast will continue to move farther offshore today, while a low pressure system tracks into the Great Lakes region. For East TN, a SW flow in the low to midlevels will warm temperatures into the 50s south and 40s north where snow cover will continue to suppress diurnal heating. As a cold front approaches the area late tonight and tomorrow, clouds will gradually increase. Ridging will produce another dry day today with increasing 850mb and thickness moderating temperatures. For this afternoon and overnight, pressure gradient tighten as a fast moving system approaches the tennessee Valley and surface ridging remains east of the Appalachians. For tonight, good valley/ridge temperature variation. The southwest flow will keep ridge tops warm and sheltered/decoupled wind valleys being colder.
1109 AM CST Sun Dec 27 2020 A cold front is just entering the northwest corner of our forecast area at this tikme, and will sweep across the area this afternoon.
Southerly flow will be on the upswing this afternoon as low pressure continues across the east central plains ahead of a weak frontal boundary.
High pressure will continue to be a presence north of the coverage warning area through the period. Warmer conditions tonight into Mon with onshore flow and slight bump upward with influx of moisture.
A cold front lags into central Louisiana on Monday, and expect a few showers in proximity to the front.
High pressure is building into the Northern Rockies causing cloud cover to decrease and creating a mix of sun and clouds for most areas.
645 PM EST Sun Dec 27 2020 Temperatures near to slightly above normal and dry conditions as upper ridging builds back into the region through early week.