Aikyam-Lab/Synoptic-Bench huggingface dataset:
338 AM CST Fri Jan 21 2022 The ebb and flow of freezing and relatively mild temperatures continues. By the afternoon, the area finds itself on the western side of the high as well as near an area of accelerated low level southerly flow ahead of a boundary in western KS. These combined advect some relatively warmer air northward.
Surface ridging will build southeast today and we'll lose our flow off the lake. A modified arctic air mass in place, combined with surface ridging and its light winds, as well as snow on the ground in some locations, will all work together to result in a very cold night. Surface ridging will remain in place on Saturday, and we will be in between the influences of upper level systems. The resulting sunshine will provide warming under a steep inversion and allow for a sizable diurnal temperature rise on Saturday, with most places expected to climb above freezing.
531 AM CST Fri Jan 21 2022 Summary: A busy weather pattern ahead with several chances of snow followed briefly by slightly warmer temperatures then another dip into frigid arctic air. An associated cold front will also move through the region late this evening. Therefore temperatures will be allowed to rebound slightly into the low 20s before the arctic airmass moves in behind the front. The cold air that will filter in with the cold front will have an affect on the SLR.
507 AM CST Fri Jan 21 2022 (Today and tonight) Currently, we have very cold temperatures around the area early this morning, ranging from the teens to around 20 degrees, except for areas that have managed to keep low clouds, where temperatures are a few degrees warmer. Lows tonight are expected to range from the upper teens into the lower 20s.
Snowfall of 1 to 3 inches with the highest amounts across NW MN is expected by early afternoon. Later this afternoon behind the cold front a strong pressure rise couplet and cold air advection will surge across the Devils Lake basin and into the northern valley.
Surface ridging will build southeast today and we'll lose our flow off the lake. A modified arctic air mass in place, combined with surface ridging and its light winds, as well as snow on the ground in some locations, will all work together to result in a very cold night. Surface ridging will remain in place on Saturday, and we will be in between the influences of upper level systems. The resulting sunshine will provide warming under a steep inversion and allow for a sizable diurnal temperature rise on Saturday, with most places expected to climb above freezing. Lows, while warmer than the frigid temperatures expected the night before, are still cold, ranging generally from the mid to upper teens.
640 AM EST Fri Jan 21 2022 High pressure will settle across the region today and tonight and then push off to the south on Saturday.
An upper level ridge will move above the Central Plains today with an upper level trough moving through the Northern Plains. This will push the dome of high pressure further east as the day progresses with a cold front moving through the area tonight.
246 AM MST Fri Jan 21 2022 Freezing rain has occurred overnight across most of NE Montana. While most of the freezing rain has moved to the east, it has left behind icy roads in many areas and left I-94 closed between Glendive and Miles City as of 2 am MST. A cold front is currently moving through the area this morning with strong cold air advection that will result in steady or slowly falling temperatures today. Will cancel the High Wind Watch for today. Winds will diminish tonight as high pressure moves into the area.
trof brought mixed winter precipitation to the eastern portion of the forecast area overnight, with slick roads from freezing rain reported east of Billings into the Dakotas. Remember that the ground is frozen across the area, so even if air temperatures rise well above freezing, any liquid precipitation that hits the ground will freeze to it, including roadways.
Cannot rule out a brief period of light rain or light freezing rain this morning in the far southern portions of the area, but currently it looks like the precip will remain south. High pressure ridging and cold conditions will continue to build into the area today, as the upper trough axis rotates across the area. High will range from the mid 30s in the north to the low 40s in the south. Cold air advection will continue tonight, with overnight lows falling into the upper teens for areas generally north of I-20 to the low 20s south. /15/ Weakly northwesterly flow aloft sets up behind the upper trough passing through the region today, and remains in place as a broader trough dominates the eastern half of the CONUS.
An approaching upper-level trough could mitigate some fog development over central portions of the San Joaquin Valley, or north of Fresno this morning. Patchy dense fog could continue over the weekend, though coverage and duration may be limited with the presence of the trough, compared to recent days. Latest satellite imagery shows the upper- level low and trough moving southward from Northern California. The low center will pass over the Great Basin today and arrive over the Colorado River Valley by this evening.
419 AM CST Fri Jan 21 2022 Summary: A busy weather pattern ahead with several chances of snow followed briefly by slightly warmer temperatures then another dip into frigid arctic air. An associated cold front will also move through the region late this evening. Therefore temperatures will be allowed to rebound slightly into the low 20s before the arctic airmass moves in behind the front. The cold air that will filter in with the cold front will have an affect on the SLR.
338 AM MST Fri Jan 21 2022 As high pressure builds into the area today, any lingering rain and snow showers should gradually come to an end. As this high pressure system moves into the area, it will be a little breezy across the plains, with temperatures generally in the mid 30s to near 40. Any lingering rain and mountain snow showers this morning will gradually come to an end by this afternoon as high pressure begins to build into the area. As we head into the weekend, upper level ridging will take hold across the area, bringing increasingly warm temperatures, along with breezy winds across the plains.
544 AM CST Fri Jan 21 2022 The ebb and flow of freezing and relatively mild temperatures continues. By the afternoon, the area finds itself on the western side of the high as well as near an area of accelerated low level southerly flow ahead of a boundary in western KS. These combined advect some relatively warmer air northward.
In addition, gusty winds will be probable across exposed ridges during the next two days. A cold/dense surface to 700 mb airmass will settle across the east side of the Sierra Nevada Mountains in the wake of the trough, and aid in driving intense easterly offshore winds across the western foothills of the Sierras, and farther west across the Coast Range of NWRN CA.
Moving ahead to tonight, longwave trough slowly slides southeastward over the higher terrain to our northwest as an upper low cuts off over AZ. As for precipitation type, shallow saturation seen with temperatures between -12C and 0C suggests that both light snow and perhaps a bit of freezing drizzle are possible in the unlikely event precip does indeed occur. Have thus gone with a slight chance of light snow and a patchy freezing drizzle mention in the northwest Friday night. Saturday, while the Panhandles look to be under a subtle upper ridge between the cyclonic flow over the Great Lakes and the AZ upper low, lack of any notable pressure gradient and concomitant light and variable surface winds will limit temperature recovery, with highs in the 40s favored.
However, the lowest levels of the atmosphere are too dry for any precipitation to region the ground. The clouds should gradually erode from northwest to southeast, with mostly clear skies returning to the entire area by the mid afternoon, as the trough moves overhead and off to the east. Temperatures will struggle into the lower to mid 40s for daytime highs today.
Rain/snow showers develop ahead of a cold front over northern Arizona by mid-morning, then spread southward through the day today. Chances for showers remain through the weekend, along with cooler temperatures and breezy northeast winds. A trough over the upper Great Basin drops southward today, becoming a closed low over Arizona by tonight. Moisture increase slightly over Arizona as the low approaches. Much of the precipitation should remain on the light side, however, as the front assocaited with the low passes through the region a period of heavier showers will be possible this evening. Model soundings also show better moisture with the front, especially in the lower levels, supporting the idea of steadier precipitation with the front. The low continues its track southward, stalling just north of the Gulf of California by Saturday morning, allowing for moisture to be advected northward.
609 AM CST Fri Jan 21 2022 For the 21/12z TAFs, mid and high level clouds continue to stream across the region but should decrease in coverage from northwest to southeast as an upper trough moves across the region. However, the lowest levels of the atmosphere are too dry for any precipitation to region the ground. The clouds should gradually erode from northwest to southeast, with mostly clear skies returning to the entire area by the mid afternoon, as the trough moves overhead and off to the east. Temperatures will struggle into the lower to mid 40s for daytime highs today.
406 AM EST Fri Jan 21 2022 High pressure will settle across the region today and tonight and then push off to the south on Saturday.
This was occurring ahead of a mid level trough extending from Saskatchewan Canada back through northern Nevada. Some light freezing drizzle was reported in Oshkosh. Latest bufkit sounding showed a few hours period where light freezing rain may be mixed with light snow this morning from the southeast panhandle into southwest NE. Otherwise a change from snow to rain today as the warm front moves east. The mid level trough will swing eastward through the Dakotas and Nebraska today.
As high pressure builds into the area today, any lingering rain and snow showers should gradually come to an end. As this high pressure system moves into the area, it will be a little breezy across the plains, with temperatures generally in the mid 30s to near 40. Any lingering rain and mountain snow showers this morning will gradually come to an end by this afternoon as high pressure begins to build into the area. As we head into the weekend, upper level ridging will take hold across the area, bringing increasingly warm temperatures, along with breezy winds across the plains.
WV imagery indicates a deepening upper level trough of low pressure dropping southward across the Great Basin. Near the surface, a lee side trough of low pressure is slowly strengthening in eastern Colorado. An upper level ridge will move above the Central Plains today with an upper level trough moving through the Northern Plains. This will push the dome of high pressure further east as the day progresses with a cold front moving through the area tonight.
845 AM MST Fri Jan 21 2022 The freezing rain has ended in far SE Montana, and surface should begin to move above freezing over the next hour, removing the icy surface. Rain/freezing rain over the foothills and mountains has transitioned to snow over the last couple hours, and this light snow will persist through the rest of the morning. trof brought mixed winter precipitation to the eastern portion of the forecast area overnight, with slick roads from freezing rain reported east of Billings into the Dakotas. Remember that the ground is frozen across the area, so even if air temperatures rise well above freezing, any liquid precipitation that hits the ground will freeze to it, including roadways.
1139 AM CST Fri Jan 21 2022 (Today and tonight) Currently, we have very cold temperatures around the area early this morning, ranging from the teens to around 20 degrees, except for areas that have managed to keep low clouds, where temperatures are a few degrees warmer. Lows tonight are expected to range from the upper teens into the lower 20s.
Temperatures currently in the low 20s wont move much today, and still expect highs to be 25-30F. Expect these clouds to begin to dissipate as warm air advection associated with a sharp mid-level ridge advances east toward the region later this evening. Broad eastern CONUS troughing holds over the area, although the first part of the weekend will be dry. We'll start out in the single digits in our east to the low to mid teens elsewhere. Despite the slow start, temps are expected to rise back to the low and mid 30s under partly to mostly sunny skies and a steady SW surface wind. Saturday night lows will again be chilly, but a little warmer than the previous night.
239 PM EST Fri Jan 21 2022 High pressure will bring cold and dry air to the Mid Atlantic for this weekend.
Today will be cold with highs staying around or below freezing for most locations. BW Chattanooga Airport, TN 33 21 43 24 47 / 10 0 0 0 0 Knoxville McGhee Tyson Airport, TN 31 18 40 21 42 / 10 0 0 0 0 Oak Ridge, TN 32 17 41 21 43 / 10 0 0 0 0 Tri Cities Airport, TN 31 13 37 16 38 / 10 10 0 0 0.
152 PM CST Fri Jan 21 2022 Afternoon cloud deck should disperse as upper trof makes passage and diurnal heating is lost. Next couple short waves of energy round base of long wave trof this weekend, but are largely moisture starved in our FA.
These conditions are brought to us by an area of high pressure that will also prevent low level mixing, which could result in air quality decreasing.
/Tonight through Friday Night/ Weak upper-level ridge to swing east across the region overnight to be replaced by a stronger ridge later in the weekend. Subsidence associated with upper-ridge to maintain dry conditions across the region through the short term period. At the surface, high pressure to build south from the Great Lakes region overnight, becoming firmly established areawide by Saturday evening allowing for light winds and cold conditions to prevail through the weekend. Further south across deep east Texas and north north Louisiana, temperatures to average in the lower 20s.
341 PM EST Fri Jan 21 2022 As of this afternoon, the low clouds have finally dissipated across central Indiana, allowing for sunshine to take over. Upper ridging will pass overhead for the rest of the day and overnight, providing subsidence and dry air and leading to mostly clear skies and veering winds during that time. Tight pressure gradients on the leading edge of the trough will lead to increased winds through the day Saturday as well, with gusts up to 30 mph expected in the northern portion of the forecast area.
Abundant insolation and a return to southerly winds have allowed temperatures to warm to above freezing this afternoon. The higher temperatures this afternoon and more high clouds tonight should result in higher low temperatures tonight than last night. A subtle wind shift/trough axis tomorrow will result in winds shifting to the north across northwest Oklahoma with westerly winds elsewhere.
341 PM EST Fri Jan 21 2022 Cold and dry weather continues through Saturday under high pressure.
115 PM EST Fri Jan 21 2022 Cold and dry weather continues through Saturday under high pressure.
129 PM EST Fri Jan 21 2022 The pattern aloft this afternoon features troughing across the eastern part of the country while at the surface, a cold front remains across the peninsula, with plenty of cloud cover and just some light rain here and there across our northern zones.
Blustery conditions are expected on Saturday in the wake of the passing trough. Highs will be in the low to mid 20s, with west winds gusting 20-25 MPH through early afternoon.
953 AM MST Fri Jan 21 2022 As high pressure builds into the area today, any lingering rain and snow showers should gradually come to an end. As this high pressure system moves into the area, it will be a little breezy across the plains, with temperatures generally in the mid 30s to near 40.
Although the morning will start off very cold Saturday, a building ridge aloft and plenty of sun will allow afternoon temperatures to reach or slightly exceed 50 degrees in most locations.
1134 AM CST Fri Jan 21 2022 Summary: A busy weather pattern ahead with several chances of snow followed briefly by slightly warmer temperatures then another dip into frigid arctic air. An associated cold front will also move through the region late this evening. Therefore temperatures will be allowed to rebound slightly into the low 20s before the arctic airmass moves in behind the front. The cold air that will filter in with the cold front will have an affect on the SLR.
High pressure continues to settle into the region through Saturday and we gradually dry out through the rest of this afternoon and evening. Light rain continues southeast of the I-65 corridor this afternoon, but temperatures have risen above freezing and thus any threat for freezing rain has come to an end. A light glaze of freezing rain was reported this morning across portions of Mobile/Baldwin counties where heavier precip rates coincided with the coldest temperatures. Skies should clear out some overnight tonight and winds relax as high pressure begins to move in. Expect lows to be in the lower 20's in these areas.
There remains a small chance for a brief period of light snow across portions of extreme southwest Kansas tonight as short range models continue to indicate a closed upper low dropping southward deep into the Desert Southwest, creating a modest increasingly difluent southwest flow aloft across the Western High Plains. Meanwhile, a weak cold front approaching from the northwest will begin pushing into western Kansas late this evening along with a minimal amount of increased mid/upper level moisture associated with the broader scale upper level trough axis. Temperatures will not be quite as cold tonight despite the weak cold front pushing through much of southwest and central Kansas by daybreak Saturday morning. With help of light northwesterly downsloping, expect lows down into the mid/upper teens(F) to the lower 20s(F).
A back door cold front will begin to move through the forecast area late tonight leading to light northerly winds across the entire forecast area. So while temperatures will be a few degrees warmer than this morning temperatures should bottom out in the teens tonight. Tomorrow will be similar to today although temperatures should be a few degrees warmer after the slightly warmer start to the day.
An upper ridge is building offshore and our area is under a dry northerly flow this morning. With colder air coming in from the north, temperatures will be about 10 degrees cooler than yesterday.
139 PM MST Fri Jan 21 2022 Current surface map shows trof/cool front across western South Dakota. May be a few light snow showers for the higher elevations of the Black Hills. Dry and warmer for the weekend.
At 19Z the initial warm front was pushing through the James River Valley while the cold front was quickly dropping through the north. Light rain has been undergoing a switch to light snow as the temperatures cool off, and while there haven't been reports of freezing rain with the light liquid amounts and warming roads, the strong winds have blown earlier snow onto roads and created slippery conditions over areas of the north and central.
356 PM EST Fri Jan 21 2022 High pressure will cross the region tonight as it moves southeast.
The additional sunshine should push temperatures back to around normal for this time of year, with highs in the low to mid 40s.
This is usually a perfect set up for a cloud line, however, cloud cover across the Lower Keys and the fact that it is January will likely inhibit a cloud line from bubbling up. The drier air will also help to limit shower activity, despite the general troughiness across the area today. From synopsis, Light to gentle breezes are expected today through Saturday, as a warm front and unsettled weather persist near the Florida Keys.
A cold pattern will persist through the next 7 days with a longwave trough over the central and eastern states.
Mid morning temperatures remained cold, in the low to mid 20s.
100 PM EST Fri Jan 21 2022 High pressure will bring cold and dry air to the Mid Atlantic for this weekend.
Upper air analysis this morning showed a trough over Texas with cyclonic flow over the state.
1157 AM EST Fri Jan 21 2022 High pressure will settle across the region today and tonight and then push off to the south on Saturday.
With influence from the high pressure still present, expect temperatures to fall quickly tonight as a result of radiational cooling with mostly clear skies, light winds, and low dew points. A few clouds will move over the northern half of the area overnight associated with a weak cold front which should help to keep temperatures up a little. A large trough that will sit NE of the area will allow subsidence to dominate region thus leading to mostly clear skies for most through the weekend.
1133 AM CST Fri Jan 21 2022 The ebb and flow of freezing and relatively mild temperatures continues. By the afternoon, the area finds itself on the western side of the high as well as near an area of accelerated low level southerly flow ahead of a boundary in western KS. These combined advect some relatively warmer air northward.
Another system will move through the Northern Plains tonight and we will see temperatures warm several degrees with the arrival of the prefrontal trough. The cold front will nudge into northern Missouri before stalling Saturday morning as the trough continues to move eastwards into the Great Lakes region. While temperatures will be much warmer on Saturday across the forecast area. those areas south of the front should see temperatures in the 40s while location along and north of the front will be about 10 degrees cooler.
Guidance is often too warm in these scenarios, especially east of the MS River, so I've kept overnight lows on the low end of the model envelope.
Temperatures will be cold again tonight, but not as cold as last night, with overnight lows mainly in the lower 20s. Saturday is shaping up to be a nice day but still cooler than normal. We'll see plenty of sunshine, with light winds and afternoon highs a little warmer than today, mainly low to mid 50s.
Tonight, clear skies and light winds will allow temperatures to drop into upper teens to the low 20s.
Winds should just keep any freezing fog at bay, but will need to monitor sheltered valley locations just in case. The areas that see cloud cover will likely see their lows stay a bit warmer, remaining in the mid teens to lower 20s. This should allow temperatures to drop into the lower to mid 20s primarily Saturday night.
Today will be cold with highs staying around or below freezing for most locations. McD Chattanooga Airport, TN 21 43 24 47 27 / 0 0 0 0 0 Knoxville McGhee Tyson Airport, TN 18 40 21 42 27 / 0 0 0 0 0 Oak Ridge, TN 17 41 21 43 26 / 0 0 0 0 0 Tri Cities Airport, TN 13 37 16 38 22 / 10 0 0 0 0.
Precipitation will be at a minimum for most of the day, but expect moisture to move back into the region this afternoon and into early tonight, with a wintry mix of freezing rain, sleet and snow expected.
At the surface, high pressure will stretch from New England to Texas. With mostly sunny skies highs will be a little warmer in the upper 30s and lower 40s.
Fog is possible again tonight in the Bayside and Gulf Waters due to easterly winds shifting to the north and bringing that warmer air back over the cooler, shallower waters. Looking ahead to tomorrow, a long wave trough will sweep across the central United States towards the East Coast and push the slowly moving front currently draped across the northern Florida peninsula down towards the Florida Keys by Saturday night. After the frontal passage, breezes will freshen out of the north and cooler, drier air will filter in.