Aikyam-Lab/Synoptic-Bench huggingface dataset:
237 PM CST Sun Feb 27 2022 Upper level ridging will continue to build over the western U. We'll have another cold night in store tonight and again Monday night before lows go above freezing.
Expect lighter N winds tonight and tomorrow morning as high pressure draws closer. Based on the NBM and HREF probabilistic output, freezing temperatures (for at least 2 hours) are expected, at least over much of the northern sections of the CWA. Dry and warmer Monday.
A few areas of light rain continue across eastern portions of the forecast area with the upper-level trough axis advancing southeastward into the Tennessee Valley. CAA and clearing skies will result in overnight lows ranging from the lower 30s northwest to lower 40s southeast. A ridge will build over the Lower MS Valley tomorrow, and this will provide stability and height rises with clear skies across most of the area.
1212 PM EST Sun Feb 27 2022 Dry and mild winter temperature, with gusty wind is expected today before a cold front returns a chance of snow showers north of Pittsburgh tonight. A strong jet aloft and a mixed boundary layer should lead to gusts up to 30 mph this afternoon, with higher values in the Laurel Mountains, and WV ridges. Clouds should begin to increase late this afternoon N of I 80 as a weakening cold front with attachment to Newfoundland moves sely through New England. The cold front will complete its passage across the Upper Ohio Valley tonight.
SHORT TERM (Tonight through Monday Night): The mid level trough axis will gradually work off the lower Texas coast into Monday morning, with high pressure building and dry air aloft arriving through Monday night. Due to clear skies and lighter winds, expect very efficient radiational cooling across the northern ranchlands, with low temperatures tonight potentially reaching freezing. Highs on Monday range from the low to mid 60s along the coast and upper 60s to low 70s across the western counties.
Sfc ridging anchored over the Srn Plains this afternoon is expected to slowly shift ESE into the region later tonight, setting the stage for good radiational cooling with light winds and a clearing sky. This will result in temps falling through their dewpoints tonight, with temps expected to fall below freezing areawide late tonight.
This area is on the mid level temperature gradient associated with the cold front dropping south through Michigan today. Given the late February sunshine (2x stronger than early January sunshine) and that the cold front is only to our northern CWA now, it will get warmer than we were earlier thinking. - Only light snow chances this week with fast moving clippers The northern stream dominates the next few days with fast northwest flow between western ridging and an upper low over eastern Canada. A low moves across southern Canada today with trailing cold front extending through the Great Lakes.
351 PM EST Sun Feb 27 2022 A cold frontal passage tonight allows for high pressure to build in on Monday.
207 PM EST Sun Feb 27 2022 A cold front will wash out over the Mid-Atlantic tonight.
High pressure over the region will remain in place through tonight and for Monday.
High temperatures will probably only reach into the lower to mid 50s across much of southeast MS and southwest AL. Temperatures will be warmer along and southeast of the I-65 corridor, with a few locations in the western FL panhandle reaching into the upper 60s to mid 70s.
1252 PM EST Sun Feb 27 2022 High pressure extending over the region today will get pushed south as a weak, dry cold front moves across the area tonight. Temperatures will be near normal to start the week, but the return of southerly flow will bring warmer readings into midweek. High pressure will continue to move south away from our region while a cold front approaches from the north. Weak cold front will push south across the area tonight. Weak high pressure will build in behind it for Monday. Period begins with an H5 trough sitting across the northeastern CONUS, providing northwesterly flow aloft across the Ohio Valley.
150 PM CST Sun Feb 27 2022 Sunny conditions across the area have allowed temperatures to warm into the low 40s in most areas south and east of the lingering snow pack over northwestern IL. The winds become light and turn northerly across the area this evening as a weak surface cold front sags southward into the area. Light winds and mainly clear skies in the wake of this frontal boundary tonight should allow temperatures to fall back into the low to mid 20s. As it does so, an associated warm front will shift northward across our area during the day.
Dry conditions under high pressure and a continued warming trend are expected through the middle of the week. High pressure bringing dry conditions to the region will persist through Monday.
1141 AM EST Sun Feb 27 2022 Low pressure passes to our north and drags a cold front through the area late this evening into tonight. High pressure then builds in through Monday night.
Clouds begin to increase with the approach of a weak upper trough.
However, moderate snow showers have formed from Adams county south into the Lower Treasure Valley of Oregon, and these will move east through the late morning and into the afternoon. A weak upper level trough will move through the region today bringing light snow showers. Best chances for snow will be mainly north of a Burns- Ontario-Stanley line today with little to no snow accumulations in the lower valleys. The precipitation will end by mid afternoon as the upper ridge rebuilds northward for Monday. This is in response to the a deepening low pressure system of the Pacific Northwest coast. Today will be the last day with temperatures below normal as warm moisture air follows the weak trough passage. Expect temperatures to reach the mid to upper 50s in the lower valleys on Monday.
224 PM CST Sun Feb 27 2022 - Off-and-on chances for light snow through mid-week - High temps in the low/mid 40s possible this week - Still watching for a storm at the end of the week/weekend with possible wintry mix impacts A couple clipper-like systems will impact the area through mid-week, bringing off-and-on chances for light snow.
A cold front dips down along the northern portion of the area tonight which will mostly bring clouds and perhaps a few light snow showers or flurries along the northeast mountains. Skies clear up again for much of tomorrow allowing for a sunny start to the week as high pressure approaches the area once again. Temperatures are expected to warm up to around normal with upper 40s to low 50s along the lowlands and upper 30s to 40s for the higher elevations.
Upstream col/ridge will afford clear skies and light winds for strong longwave radiational losses.
A stretch of very nice weather is anticipated across the local area as a ridge of high pressure aloft builds across the region through mid-week. eventually giving way to an upper level low ejecting out of the southwest and cooler and more troughy weather returning late in the period. expect temperatures to be about 10 degrees warmer than yesterday afternoon. no appreciable weather is expected until late in the extended when global models bring a cold front across the area from the north and an upper level low from the southwest and into the plains.
High pressure dominates the weather during the new work week. Temperatures have plateaued, around ten degrees lower than yesterday thanks to the low clouds and rain which will continue through the rest of the afternoon across the area. The trough axis approaches tonight as the best upper divergence pushes off to the northeast with the departing jet streak. Temperatures cooler once again tonight, in the mid 30s across the north to mid 40s across the south. Monday and Monday Night: As high pressure begins building in behind the exiting upper system, conditions will be drying out from west to east. With more sunshine through the afternoon, high temperatures should be able to climb back up into the low to middle 60s.
Upper pattern was beginning to change with ridging building over the Rockies per recent water vapor imagery. The spine of the low level ridge was located from north Texas to along the Ohio River with modest westerly winds to its north.
This feature is more of a wind shift line with west-northwest winds setting up west of the trough to south to southwest winds out ahead of it. The sfc front is progged to sag southward into northeast SD tonight and then head back east as a warm front Monday morning as low pressure travels along the front farther north across parts of ND into northern MN. With the warm front trekking eastward out of our area Monday morning, west to northwesterly flow takes hold which will help to scour our any clouds/fog in our eastern zones by late morning/midday. Cooler temps in the 30s to low 40s will be more common across our northeast where a thicker snow cover still remains.
High pressure along with drier air will build into the region Monday and dominate through the week. Monday and Monday Night: As high pressure begins building in behind the exiting upper system, conditions will be drying out from west to east. With more sunshine through the afternoon, high temperatures should be able to climb back up into the low to middle 60s.
236 PM MST Sun Feb 27 2022 Water vapor imagery shows a ridge over our forecast area with very dry air associated with it. This trough will move eastward across our forecast area tomorrow morning bringing high level clouds and a slight increase in winds. The low to mid levels will be much too dry for any precipitation to form as a result of this trough passage. There is weak cold air advection that pushes across our forecast area during the day tomorrow due to the trough. As a result, high temperatures will be similar to today as the competing factors of a warmer start to the day and slight cold air advection cancel each other out. There are no weather hazards expected as winds will not be very strong which keeps fire weather conditions on the lower side.
A brief period of light freezing drizzle will be possible as well Monday into Monday evening but little impact is expected.
This forecast is slightly warmer than the 50th percentile NBM but not as warm as the 75th percentile which suggested highs in the upper 60s to around 70. A very weak cold front will drift into ncntl Nebraska Monday night and winds aloft will become a bit stronger throughout wrn and ncntl Nebraska.
854 PM EST Sun Feb 27 2022 Clear and quiet across the Ohio Valley this evening as high pressure sits across a large portion of the central US. Temps have slowly cooled into the low 40s this evening, and expect overnight temps to bottom out in the upper 20s. Temperatures range from the low-to-mid 40s across southern Indiana up to near 50 degrees around the KY/TN border and will increase a few more degrees by mid-afternoon. Tomorrow, deep NW flow is expected across the Ohio and Tennessee Valleys with upper-level ridging located across the Intermountain West and troughing located off the east coast of North America. At the surface, an elongated ridge of high pressure will extend from SW- NE across the Ohio and lower Mississippi Valleys, setting up another day filled with sunshine across the region.
Dry conditions will persist through much of the week as high pressure builds over the region.
Current 500mb analysis shows ridging from the desert southwest through the central Rockies and into the Plains, leaving ND under northwest flow aloft. 850mb WAA associated with the passing of the low will create an inversion just above the surface to prevent higher gusts from being mixed down, but widespread sustained winds near 20 kts are expected during the day.
High pressure builds in through the coming week with dry weather expected and moderating temperatures. Surface cold front passes off the southern coast through the early morning hours, bringing an end to rain chances before sunrise. Clearing skies and CAA allow temps to drop into the lower to mid 30s for NE NC, while clouds holding on longer will bring lows closer to 40 along the coast south of Cape Hatteras. High pressure building over the northeast means that cold air advection is the name of the game Monday, with subsidence aloft keeping mainly clear skies in place.
505 PM CST Sun Feb 27 2022 Upper level ridging continues to provide light winds, mainly clear skies, and warm temperatures to the region. No changes in the forecast for the middle of the week as upper level ridging will continue to provide well above average temperatures to the Northern Plains.
744 PM CST Sun Feb 27 2022 Nighttime RGB imagery and obs indicate the lower clouds were sliding south through Cullman, Marshall and DeKalb Counties, with a narrow band of mid level clouds behind this layer. Tranquil weather expected early this week as high pressure at the surface becomes established over the area.
High pressure expanding slowly eastward across the Gulf Coast states, along with generally clear skies, will lead to a continuation of the warming trend with dry conditions through the short term.
829 PM EST Sun Feb 27 2022 A cold front will drop south late tonight into early Monday, resulting in a chilly start for the work week.
- Off-and-on chances for light snow through mid-week - High temps in the low/mid 40s possible this week - Still watching for a storm at the end of the week/weekend with possible wintry mix impacts A couple clipper-like systems will impact the area through mid-week, bringing off-and-on chances for light snow.
Northerly surface flow will also continue through the day as high pressure builds eastward from Texas to the Mississippi Valley region. Highs Monday afternoon are forecast to range in the lower to mid 60s.
341 PM CST Sun Feb 27 2022 High pressure expanding slowly eastward across the Gulf Coast states, along with generally clear skies, will lead to a continuation of the warming trend with dry conditions through the short term.
334 PM CST Sun Feb 27 2022 Cold front currently moving through our outer coastal waters after passing through the lower end of Plaquemines Parish late this morning. Upper trough axis that is actually driving the front is still to the northwest of the area from near Memphis to Dallas. We've seen a good bit of the low cloud cover dissipate over the last few hours, but southwest Mississippi, the Mississippi coast and New Orleans metro areas haven't seen much of that sunshine yet. Temperatures at 2 PM CST ranged from 50 at McComb and New Roads to the lower 60s at several locations that have seen some sunshine in the last couple hours.
702 PM EST Sun Feb 27 2022 A cold frontal passage tonight allows for high pressure to build in on Monday.
858 PM EST Sun Feb 27 2022 A weak area of low pressure will track east and off the Carolina coast tonight. Dry high pressure builds in Monday and likely dominates our weather through the end of the week. Dry high pressure centered near the eastern Great Lakes will keep skies mostly clear thru Monday, and maintain a light northeasterly wind in most areas.
557 PM EST Sun Feb 27 2022 A crossing cold front will ensure seasonable temperature for Monday. No appreciable change was needed for the eve update as a cold front extending from ern Canadian low pres is spawning some stratocu, which will develop southward although frontal penetration is, and will further weaken as per ewd progressing low pres. High pressure should result in a clearing trend late tonight and Monday as it tracks E across the Great Lakes/Upper Ohio Valley region. Increasing clouds are expected across the area in warm advection ahead of the approaching trough.
345 PM CST Sun Feb 27 2022 Upper level ridging continues to provide light winds, mainly clear skies, and warm temperatures to the region. No changes in the forecast for the middle of the week as upper level ridging will continue to provide well above average temperatures to the Northern Plains.
Tonight: As the SW-NE oriented trough axis & strong isentropic subsidence moves in this evening, clouds will quickly clear from NW- SE, as they are currently are in the NW Delta. Due to temps falling below freezing, some of this could be patchy freezing fog. If trends continue in the direction of dense fog, future mention in the HWO & freezing fog advisory may be needed. PWs only around a quarter inch) & efficient mixing & clear skies, highs will moderate near climo into the low-mid 60s. remaining above freezing through the early morning hours.
High pressure will move into the area this evening, providing mostly clear skies tonight through tomorrow, with generally light north to northeast winds by tomorrow afternoon. /issued 203 PM CST Sun Feb 27 2022/ SHORT TERM (Tonight through Monday Night): The mid level trough axis will gradually work off the lower Texas coast into Monday morning, with high pressure building and dry air aloft arriving through Monday night. Due to clear skies and lighter winds, expect very efficient radiational cooling across the northern ranchlands, with low temperatures tonight potentially reaching freezing. Highs on Monday range from the low to mid 60s along the coast and upper 60s to low 70s across the western counties.
VFR conditions will dominate through much of the period although cannot rule out some patchy BR/FZFG toward daybreak on Monday as temperatures drop below freezing. Sfc ridging anchored over the Srn Plains this afternoon is expected to slowly shift ESE into the region later tonight, setting the stage for good radiational cooling with light winds and a clearing sky. This will result in temps falling through their dewpoints tonight, with temps expected to fall below freezing areawide late tonight.
518 PM CST Sun Feb 27 2022 Upper level ridging will continue to build over the western U. We'll have another cold night in store tonight and again Monday night before lows go above freezing.
With clear skies, recent rainfall, and light winds, patchy to widespread freezing fog is possible along and west of the Mississippi River tonight. Temperatures will be rather borderline, considering dewpoints are in the upper 20s to lower 30s, but should fall a degree or two below freezing in the lowest lying spots overnight. This will allow for some light icing on bridges and overpasses. Confidence in freezing fog is pretty high, but coverage and intensity is still in question. Nevertheless, a Special Weather Statement has been issued highlighting the areas that could see freezing fog and potential impacts. A freezing fog advisory may be needed this evening.
601 PM EST Sun Feb 27 2022 A weak area of low pressure will track east and off the Carolina coast tonight. Dry high pressure builds in Monday and likely dominates our weather through the end of the week. Cloud cover is beginning to break up across the NC mtns/fthills as the upper trof axis shifts east and drier llvl air mixes in ahead of stg sfc hipres. Dry high pressure centered near the eastern Great Lakes will keep skies mostly clear thru Monday, and maintain a light northeasterly wind in most areas.
647 PM EST Sun Feb 27 2022 A cold front will sweep south across Pennsylvania this evening.
344 PM CST Sun Feb 27 2022 Upper level ridging continues to provide light winds, mainly clear skies, and warm temperatures to the region. Above average temperatures are again on tap for Monday with highs in the mid 40s from southwest Minnesota to the low to mid 60s along the Mo River. No changes in the forecast for the middle of the week as upper level ridging will continue to provide well above average temperatures to the Northern Plains.
739 PM EST Sun Feb 27 2022 A cold front will sweep south across Pennsylvania this evening.
347 PM MST Sun Feb 27 2022 Less amplified pattern over the area for the next 24 hours as ridging is beaten down by a Pacific train of energy moving across southern Canada/northern Montana. This flow pattern continues to bring a mixing downslope across the region but elongates the leeside trough so pressure gradients are not focused over the gap flow areas.
Very little if any snow is likely with this system, but isolated flurries over the highest peaks cannot be ruled out.
644 PM EST Sun Feb 27 2022 A weak area of low pressure will track east and off the Carolina coast tonight. Dry high pressure builds in Monday and likely dominates our weather through the end of the week. Cloud cover is beginning to break up across the NC mtns/fthills as the upper trof axis shifts east and drier llvl air mixes in ahead of stg sfc hipres. Dry high pressure centered near the eastern Great Lakes will keep skies mostly clear thru Monday, and maintain a light northeasterly wind in most areas.
631 PM EST Sun Feb 27 2022 A cold front will wash out over the Mid-Atlantic tonight.
409 PM MST Sun Feb 27 2022 An upper ridge covers the western CONUS, with a trough over the east, and northwesterly flow over the northern plains. Over the Black Hills, relative humidity has dipped into the lower teens, but winds in that area are relatively light. Stationary boundary will continue keeping the coldest air to the northeast, and WAA will resume as the western upper ridge rebuilds.
933 PM EST Sun Feb 27 2022 A cold front will wash out over the Mid-Atlantic tonight.
Temperatures were a little cooler, but still topped out in the low to mid 80's, some 6 to 8 degrees above normal. A cold front moves through the area tomorrow with cloudy skies and a slight chance of a showers expected. VFR conditions will prevail into early tonight, then late tonight into Monday morning some areas of MVFR/local IFR conditions will be possible ahead of a weak cold front. A weak cold front will move across the waters late tonight and Monday, with winds turning to the north and briefly increasing on Monday. High pressure will build in behind the front, with winds and seas expected to hold below headline criteria through the rest of the work week.
While instability has increased slightly compared to yesterday, it's still on the lower side, so no mention of thunderstorms in the forecast. Highs will only be in the 60s, below normal, with lows tonight in the lower 40s to lower 50s, near normal.
RMB AFTERNOON UPDATE: Slow warm up continues through Tuesday as a ridge remains in place over the eastern third of the country. Chinook arch clouds are pouring over eastern Montana along the top of the ridge. There is an outside chance for freezing rain and ice with a disturbance passage Monday evening and early Tuesday morning.
1054 PM CST Sun Feb 27 2022 Upper level ridging will continue to build over the western U. We'll have another cold night in store tonight and again Monday night before lows go above freezing.
Current 500mb analysis shows ridging from the desert southwest through the central Rockies and into the Plains, leaving ND under northwest flow aloft. 850mb WAA associated with the passing of the low will create an inversion just above the surface to prevent higher gusts from being mixed down, but widespread sustained winds near 20 kts are expected during the day. Confidence in the potential for some freezing rain with this system is increasing, as forecast soundings maintain the 850mb warm nose aloft into Tuesday.
For today, a narrow sw-ne ridge of high pressure will be in place.
1035 PM EST Sun Feb 27 2022 Currently - A weak trough off the Florida Atlantic coast has resulted in a col and light winds across the area this evening. The combination of low level lift and good confluence in the vicinity of the col resulted in a prolonged period of light rain across the Lower Keys and adjacent near through offshore waters. Meanwhile, zonal flow aloft is gradually slipping into broad troughing as an upper trough begins to sharpen slightly over the northern gulf coast.
110 AM EST Mon Feb 28 2022 A weak area of low pressure will track east and off the Carolina coast tonight. Dry high pressure builds in Monday and likely dominates our weather through the end of the week. Dry high pressure centered near the eastern Great Lakes will keep skies mostly clear thru Monday, and maintain a light northeasterly wind in most areas.