Aikyam-Lab/Synoptic-Bench huggingface dataset:
/22/ Tonight through tomorrow: Early afternoon water vapor satellite imagery continues to depict an amplifying longwave northern stream trough extending from the Northern Plains into the Ohio Valley. A closed upper low also remains cutoff over the Desert Southwest and will remain there through the short term forecast period. Predominately zonal flow aloft will also remain across the Lower Mississippi Valley within the base of the amplifying longwave trough. At the surface, a 1034mb high pressure is centered over the Southern Plains into the Lower Mississippi Valley along with an associated continental polar airmass. The boundary layer will quickly decouple after sunset with overnight lows plummeting into the low 20s to upper teens. A very large diurnal temperature curve is forecast tomorrow with afternoon high temperatures quickly rebounding into the low to mid 50s as the airmass continues to modify.
However some lingering light snow flakes and light drizzle/freezing drizzle will be possible on the back edge across portions of the central and into parts of the southwest. Associated mid level warm front will bring a chance for light snow to the area from west to east tonight, then across central and eastern areas of the state during the day Sunday.
Winds were light over the higher terrain while on the plains a light SW wind was noted. This is due to a modest, but relatively dry 500 mb closed circulation over AZ, with a ridge axis extending from the PAC NW into the NW Gulf of Mexico. The best chance of this occurring will be over the lower parts of the San Luis Valley and possibly areas along the lower Ark Rvr Valley. Key Messages: 1) More inclement/winter weather arrives mid week, with increased precipitation chances and cooler temperatures across southern Colorado.
444 PM MST Sat Jan 22 2022 Current surface map places low over western North Dakota with warm front into central South Dakota. Not expecting any freezing rain tonight. Surge of low level warm advection on Sunday will result in highs around 10 degrees warmer than today.
Current surface map places low over western North Dakota with warm front into central South Dakota. Not expecting any freezing rain tonight. Surge of low level warm advection on Sunday will result in highs around 10 degrees warmer than today.
447 PM EST Sat Jan 22 2022 A milder westerly flow of air returns to the region tonight as high pressure slides off of the eastern seaboard tonight.
Temperatures will continue to be variable as several mainly weak cold fronts move through the area.
A stalled, cutoff low pressure system continues to spin just north of the Gulf of California, providing energy and just enough moisture to maintain broken cloud cover and scattered rain and snow showers across much of northern Arizona. The low will begin to slowly move eastward overnight, picking up steam on Sunday as it crosses Arizona, completing its exit of the area late Sunday night.
At 20Z (2:00 PM CST) this afternoon, temperatures had warmed to near 50 degrees in many locations across the forecast area, making for a noticeably warmer day than recent days. Surface maps showed high pressure centered over the Red River Valley while a clipper system was moving from Canada into the Dakotas. A cooler air mass in the wake of tonight's clipper system will impact temperatures tomorrow, especially in far northeast and eastern KS.
913 PM EST Sat Jan 22 2022 Strong radiational cooling on tap tonight under sfc ridging, mostly clear skies and mainly light winds and most locations look to dip into the low to mid 20s. Cannot rule out some patchy freezing fog in parts of the south for the morning but have not seen enough indication or confident enough to include mention in the grids. /Issued 155 PM EST Sat Jan 22 2022/ Today troughing over the eastern CONUS and a blocking ridge in place over the northeastern Pacific will result in northwesterly flow overhead and a change in our sensible weather.
524 PM CST Sat Jan 22 2022 Northwest mid/upper flow prevails across the Central CONUS with a mean mid/upper trough along and north of the Great Lakes area.
High pressure will keep significant weather systems away from the area for at least the next several days. There will be areas of fog across the lowlands of Western Washington--especially in the night and morning hours.
A low pressure system moving slowly eastward over southern AZ should draw this moisture westward to the east slopes of the Sacramento Mountains including Roswell tonight until mid day Sunday. This upper low will also produce a chance of rain and snow showers over the southwest mountains of the forecast area tonight. The coverage of precipitation should then expand eastward to include the lower Rio Grande Valley and Sacramento Mountains on Sunday. Mixed rain and snow in the lowlands and all snow in the southwest and south central mountains.
633 PM EST Sat Jan 22 2022 High pressure weakens across the area tonight. A cold front moves through Sunday evening.
Gusty ridgetop winds will persist across northwest California again this evening and overnight but not quite as strong as last night.
632 PM EST Sat Jan 22 2022 A milder westerly flow of air returns to the region tonight as high pressure slides off of the eastern seaboard tonight.
426 PM MST Sat Jan 22 2022 As the main trough that affected us yesterday moves across the High Plains region, a ridge of high pressure will build off of the Pacific Coast.
A low pressure system moving slowly eastward over southern AZ should draw this moisture westward to the east slopes of the Sacramento Mountains including Roswell for the remainder of tonight until mid morning or mid day Sunday. This upper low will also produce a chance of rain and snow showers over the southwest mountains of the forecast area for the remainder of tonight. The coverage of precipitation should then expand eastward to include the lower Rio Grande Valley and Sacramento Mountains on Sunday, and eventually the southeast plains Sunday night. Mixed rain and snow in the lowlands and all snow in the southwest and south central mountains.
1123 PM CST Sat Jan 22 2022 Northwest mid/upper flow prevails across the Central CONUS with a mean mid/upper trough along and north of the Great Lakes area. With a glancing blow of H85 cold air advection and some increase in mid clouds, maximum temperatures may be impacted but above normal values are still expected to prevail with highs in the low to mid 50s. Another more robust cold front is progged to arrive late Monday, however most locations are still expected to climb well into the 50s prior to the fropa.
Currently, high pressure is sliding off to the northeast with a clipper system on its heels.
943 PM MST Sat Jan 22 2022 The forecast focus in the short term period is on the cold front that moves across the region Monday night. This is in advance of the first open trough in a series of progressive waves that move along the northwest flow along the Rockies before tracking out across the plains.
A trailing cold front is expected to quickly work through our area through the late morning and afternoon hours. However, these warm temperatures won't last long as a dry cold front gets pushed in from the northwest.
Today: Southern areas of the CWA will see warmer temperatures than yesterday with highs in the mid to upper 40s. A cold front along with increased cloud cover and a colder airmass will result in highs in the upper 30s to low 40s over northern portions of the area. Tonight: Lows will range from the low 20s east to the low 30s west under mostly clear skies.
1051 PM EST Sat Jan 22 2022 A milder westerly flow of air returns to the region tonight as high pressure slides off of the eastern seaboard tonight.
Light returns lit up the radar across much of the forecast area overnight, as a cold front brought a push of gusty northwest winds.
Current surface map places low over western North Dakota with warm front into central South Dakota. Not expecting any freezing rain tonight. Surge of low level warm advection on Sunday will result in highs around 10 degrees warmer than today. Cold front back into the area Monday; reaching northwest South Dakota Monday morning then into northeast Wyoming/southwest South Dakota Monday afternoon.
325 AM EST Sun Jan 23 2022 Cold high pressure will remain in place across the area this weekend.
1019 PM EST Sat Jan 22 2022 Dry high pressure will persist through Monday.
/NEW/ /Through Tonight/ An ejecting Four Corners upper low will gradually lead to the onset of southerly return flow over the next 24 hours. As the low moves across the state on Monday, rain chances return to the forecast, especially across Central and East Texas.
Today Through Monday As of 20Z, surface ridging is centered over southern AR and northern LA with light and variable winds area wide. With surface ridging shifting south on Sunday and increasing southerly flow headed into Monday, temperatures will moderate further with highs in the 50s to low-60s over southern sections and lows in the 20s and 30s.
1237 AM EST Sun Jan 23 2022 A milder westerly flow of air returns to the region tonight as high pressure slides off of the eastern seaboard tonight.
/issued 930 PM CST Sat Jan 22 2022/ With dominant high pressure at the sfc, expect another very cold night with temperatures bottoming out in the 20s areawide. Warmer air to advect north allowing for a gradual warming trend through Sunday night with afternoon highs on Sunday near 60 degrees with overnight lows on Sunday night in the low to mid 30s.
1026 PM EST Sat Jan 22 2022 A milder westerly flow of air returns to the region tonight as high pressure slides off of the eastern seaboard tonight.
1206 AM CST Sun Jan 23 2022 - Seasonable temperatures will exist into Sunday, albeit a touch cooler.
146 AM EST Sun Jan 23 2022 Dry high pressure will persist through Monday.
Deterministic NBM appears to be a warmer outlier. Highs should moderate a little the next couple days as the base of the trough that brought in the cold air mass lifts and shifts east. A widening of the main upper trough that's been encompassing the eastern half of the country lately will pick up a closed low currently situated near the AZ/Mexico border. This low will start opening up as it tracks east across Texas on Monday.
1006 PM EST Sat Jan 22 2022 A milder westerly flow of air returns to the region tonight as high pressure slides off of the eastern seaboard tonight.
932 PM CST Sat Jan 22 2022 9 PM surface map showed a pressure ridge over Arklatex and Arklamiss, extending northeast to the Midsouth. For the overnight, the pressure ridge will drop to central TX, resulting in a gradually tightening pressure gradient over the Midsouth. /issued 232 PM CST Sat Jan 22 2022/ The Rex Block persists over the western CONUS this afternoon with a deep trough anchored over the east. The cut-off low over the Desert Southwest has been quasi-stationary for a few days but will begin to open up and move east Sunday night and Monday as a kicker trough rides over the top of the ridge off the Pacific Northwest coast. Wind will be from the west tomorrow, briefly shifting northwest in the afternoon as a weak cold front moves into the area.
/ISSUED 450 PM MST Sat Jan 22 2022/ Looking at the big picture for the next few days, there is upper level ridging that continues to dominate the West Coast while a deep, persistent low over the Hudson Bay extends southward into the ND/MN area, resulting in a northwest flow aloft to our region.
203 AM CST Sun Jan 23 2022 A rather fast-paced series of dry cold fronts will continue. The first cold front will pass across our region late this morning and early this afternoon. Tonight will be mostly clear as high pressure moves overhead. Overnight lows will be in the low to mid 20s. Another dry cold front will move southeast across our region Monday night. Ahead of this front, gusty southwest winds will raise high temps into the lower 50s across parts of west KY and southeast MO.
305 AM EST Sun Jan 23 2022 Dry and warming high pressure returns to the area today through Monday.
Highs this afternoon have topped out in the low to mid 40s for most of the area. Winds will be slightly breezier on Sunday as a dry cold front associated with a clipper system traversing the upper Midwest pushes southeast across the CWA during the morning. Monday: The warming trend continues into Monday as winds quickly shift back to southerly ahead of a stronger cold front that will pass through the area late Monday afternoon and evening. Guidance is now trending dry with the frontal passage late Monday/Monday night as an upper-level cut-off low over the Desert Southwest is progged to open up into a trough and progress through southern Louisiana. This is farther south than previous runs of the model suite, which will keep the Gulf moisture too far south to interact with the cold front over our area.
Tonight into tomorrow morning, low temperatures will be "warmer" compared to the past few nights - in the upper 20s and low 30s. On the synoptic scale, the closed low positioned along the Arizona/Mexico border tracks across northern Sonora as the broad upper trough remains draped over the eastern CONUS.
Winds were light over the higher terrain while on the plains a light SW wind was noted. This is due to a modest, but relatively dry 500 mb closed circulation over AZ, with a ridge axis extending from the PAC NW into the NW Gulf of Mexico. The best chance of this occurring will be over the lower parts of the San Luis Valley and possibly areas along the lower Ark Rvr Valley. Key Messages: 1) More inclement/winter weather arrives mid week, with increased precipitation chances and cooler temperatures across southern Colorado. An overall ridge of high pressure will be slowly expanding eastward across the area.
A longwave upper trough will persist across the eastern North America with generally zonal flow at the base of the trough over our region through Monday. 10" by Sunday morning as high pressure settles in just west of the area. Beaches will be a tad warmer around 40 degrees.
400 AM EST Sun Jan 23 2022 Cold high pressure will remain in place across the area this weekend.
Light flurries are possible in the higher elevations of northeast Tennessee and southwest Virginia with a seasonally cold night area- wide. At the surface, a weak low pressure system is centered over the Upper Mississippi River Valley with an associated frontal boundary extending eastward. However, increased NW flow and proximity to deeper moisture in northeastern portions of the region will be sufficient for flurries, especially in the higher terrain. Based on the forecast soundings in the region, moisture does seem to be lacking below 850mb, so anything measurable looks fairly unlikely, outside of maybe the highest peaks.
Based on the simulated reflectivities shown in the higher resolution models, will skip the tempo uncertainty and go straight for prevailing in the 30 hour TAF sites. The cloud cover should keep temperatures warmer tonight compared to last night.
Still on track for a morning arrival of the cold front, which will drop temperatures throughout the day. Snow totals across lower elevations are uncertain but look like they will remain on the low side due to downsloping off of the Bull Mountains.
Cold Canadian high pressure building into the region is producing cold air advection from the Deep South southward into the FL Peninsula. With light winds abundant low level moisture and temps near freezing in N FL have added frost for Levy and N Citrus Counties tonight.
With below freezing temps might be concerned for freezing fog, however this type of patchy ground fog usually not associated with freezing roadways. Large Hudson Bay vortex and associated broad, large scale trough covers almost all of North America with surprisingly no strong waves seen upstream, those being reserved for western fringe of trough over western CONUS in NW flow. Any clouds associated with periphery of large-scale upper low should stay mostly north of the state.
Early afternoon satellite imagery was showing an amplified ridge of high pressure across the west coast extending into British Columbia. Under the ridge, low clouds remained trapped within the Snake River Plain and Eastern Magic Valley while the mountains enjoyed ample sunshine. An associated inverted temperature profile was also helping to prevent any substantive mixing in the lower levels.
Contributing to the lower than normal temperatures will be the slow erosion of low-level moisture and associated cloud-cover. Factoring in the light winds, wind chill values could fall to around the 40 degree mark along the coasts, and the lower to middle 30s inland.
A large scale upper level trough over the eastern part of the continent will continue to bring cold weather through the period.
With thicknesses increasing just a hair tomorrow combined with light westerly winds, afternoon high temperatures should be about 5 degrees warmer than today. /WCI The upper low discussed above will finally gain eastward momentum tomorrow and pass across the region as a positively-tilted trough/low on Monday. Forecast soundings suggest light rain would be the most likely mode should a shower manage to make it into the FA, but near surface temperatures will have to be watched closely as they will fall close to the freezing mark.
An upper level low, currently near the Baja region, is expected to move to the north and east into West Central Texas Sunday night into Monday. QPF amounts don't look particularly heavy with the highest totals around. Daytime highs are expected to rise into the low to mid 60s.
350 AM EST Sun Jan 23 2022 High pressure will build in early this week keeping the area dry and cold.
1027 PM MST Sat Jan 22 2022 As the main trough that affected us yesterday moves across the High Plains region, a ridge of high pressure will build off of the Pacific Coast. Northwest flow will dominate the weather pattern to start the work week as a ridge of high pressure builds east over the western states.
At 20Z (2:00 PM CST) this afternoon, temperatures had warmed to near 50 degrees in many locations across the forecast area, making for a noticeably warmer day than recent days. Surface maps showed high pressure centered over the Red River Valley while a clipper system was moving from Canada into the Dakotas. A cooler air mass in the wake of tonight's clipper system will impact temperatures tomorrow, especially in far northeast and eastern KS. Another clipper system looks to take a similar trajectory Sunday night and Monday, with another cold front moving into the area midday Monday. That front will push south as a Canadian ridge builds in from the north.
/issued 932 PM CST Sat Jan 22 2022/ 9 PM surface map showed a pressure ridge over Arklatex and Arklamiss, extending northeast to the Midsouth. For the overnight, the pressure ridge will drop to central TX, resulting in a gradually tightening pressure gradient over the Midsouth. /issued 232 PM CST Sat Jan 22 2022/ The Rex Block persists over the western CONUS this afternoon with a deep trough anchored over the east. The cut-off low over the Desert Southwest has been quasi-stationary for a few days but will begin to open up and move east Sunday night and Monday as a kicker trough rides over the top of the ridge off the Pacific Northwest coast. Wind will be from the west tomorrow, briefly shifting northwest in the afternoon as a weak cold front moves into the area.
Relatively quiet across the forecast area early this afternoon, with strengthening southwesterly flow gradually ushering in some warmer air. However, dry air in the lowest levels is expected to win out, with a few sprinkles and/or flurries being the most those areas get. Sunday looks to be quite similar to today though perhaps a few degrees cooler. Another mild day is on tap for most/all of the area on Monday, though a strong cold front will be approaching from the north during the day. As it stands, currently have most of the area getting into the 40s, but if the front speeds up a bit, northern portions of the area could end up being cooler, with temperatures falling through the afternoon.
347 AM EST Sun Jan 23 2022 High pressure will move east this morning. A cold front will cross the region later this afternoon through tonight. High pressure will cross the region Monday.
930 PM CST Sat Jan 22 2022 With dominant high pressure at the sfc, expect another very cold night with temperatures bottoming out in the 20s areawide. Warmer air to advect north allowing for a gradual warming trend through Sunday night with afternoon highs on Sunday near 60 degrees with overnight lows on Sunday night in the low to mid 30s.
High pressure will remain in control through Monday, allowing dry conditions and seasonable temperatures to persist.
The southern cutoff low will become an open wave as it becomes absorbed by the eastern trough while crossing into Texas.
A weather system will be pushing south into the northern Rockies Monday afternoon along with a cold front. The cold front pushes into the lower elevations of the north during the afternoon with scattered light snow developing by sunset. PWAT values are highest in eastern portions of the forecast area and higher yet in South Dakota as the trough passes Monday night.
Weakening arctic high pressure is shifting to the Gulf Coast with weak SW surface flow across the Mid-South helping to hold temps up a bit. WSW winds ahead of a approaching weak cold front will help temps climb to near normal today with highs in the upper 40s/lower 50s and plenty of sunshine. A weak cold front will push into the area tonight and dissipate. Weak high pressure will quickly move through and lows will range from the mid 20s to lower 30s. SW winds redevelop ahead of the next cold front and temps will climb will into the 50s with plenty of sun. A strong cold front will move through Monday night.
226 AM MST Sun Jan 23 2022 The forecast focus in the short term period is on the cold front that moves across the region Monday night. This is in advance of the first open trough in a series of progressive waves that move along the northwest flow along the Rockies before tracking out across the plains.
BUFKIT momentum transfer suggests sustained winds around 15kts on the southerly winds today and only an hour or 2 this evening behind the cold front with northerly gusts to 25kts as the mixing layer remains shallow to around 925mb.
Today is forecast to be one of those mild days in the 50s (for most), but lingering clouds could keep far E areas cooler in the 40s, and one doesn't have to go too far east to find only 20s and 30s. Monday is shaping up to be a bit of a transition day as a cold front swings through during the daytime hours.
Any remaining patchy freezing fog will diminish early this morning. Otherwise, high pressure in the vicinity of Nevada will continue providing quiet conditions through the weekend.
358 AM MST Sun Jan 23 2022 Latest RAP analysis shows a low pressure system over the upper Midwest which is bringing breezy winds over the eastern portion of the CWA as HLC has seen gusts of 25 knots. Over the western CONUS has a ridge as the High Plains remains in northwesterly flow. Winds are expected to become breezy as weak lee trough moves through the area. Breezy conditions are again anticipated to develop as winds become northerly at 15-20 knots and gusts up to 30 knots possible as pressure gradient tightens behind the trough.
High pressure ridging continues over Northern California with a low pressure system centered in southwest Arizona gradually moving eastward today.
Isolated to scattered showers should develop near/after midnight at LRD and COT and spread E through daybreak ahead of an upper low. Coastal troughing will become better defined today along the Lower TX Coast all the while cool surface ridging holds firm across our region with abundant clouds. Saturated isentropic upglide from 295-300K will keep this cloud layer intact before deepening considerably tonight in response to a compact upper low entering the Trans-Pecos. At present, models are trending a bit faster with this drying which argues keeping our milder highs out west, although still not as warm as the NBM given the cooler CONSMOS and CONSSHORT output.