Aikyam-Lab/Synoptic-Bench huggingface dataset:
1003 PM EST Mon Jan 11 2021 A weak trough will move east across the area this evening. A ridge will build east across the area Tuesday and then move east of the area Tuesday night.
1017 PM MST Mon Jan 11 2021 06Z TAF CYCLE VFR prevails with skc and terrain driven drainage winds, except where IFR/LIFR cigs and fg/fzfg is still expected to develop past midnight early Tuesday morning over portions of the lower Pecos River Valley and the Caprock. Patchy freezing fog is possible across eastern portions of the state late tonight into Tuesday morning and may create hazardous driving conditions.
For today, guidance suggests that the low cloudiness will continue scour out across the region with most places seeing mostly sunny skies by late morning and into the early afternoon hours.
Therefore, a Freezing Fog Advisory has been issued until 9 AM in corresponding portions of Deep East Texas through northwest Louisiana. In areas where freezing fog becomes dense, a thin layer of ice can form on all surfaces including bridges and overpasses making for hazardous driving overnight. Freezing Fog Advisory until 9 AM CST Tuesday for LAZ005-010>014- 017>022. Freezing Fog Advisory until 9 AM CST Tuesday for TXZ149>153- 165>167.
339 AM EST Tue Jan 12 2021 Overcast skies and lingering showers will continue this morning as low pressure accelerates off of our coastline.
230 AM CST Tue Jan 12 2021 Clouds should finally clear the PAH forecast area by around 12z, and with sunshine and southwest winds, highs today will be much warmer and a little above normal in the middle to upper 40s.
High pressure will build into the region as well. but the southeast may creep into the lower 50s as long as those clouds get out of the way. the clearing skies under the ridge will set up some better cooling and lows will drop into the 20s.
/Issued 620 PM EST Mon Jan 11 2021/ Rain is continuing with some mixed precip in the higher elevations of the NE GA mountains. The parent low pressure center is currently just south of Pensacola, FL and is still expected to push E/NE tonight. It will be positioned just off the NC coast by daybreak Tuesday morning allowing a weak high pressure ridge to build in from the west. Highs will be mostly in the low to mid 50s with some upper 50s across the southern parts of the CWA. Overnight lows will range from the upper 20s to upper 30s with cooler temperatures possible in the higher elevations. High pressure keeps a lid on the active weather for the most part.
There remains a risk for patchy freezing fog development late tonight, primarily over the western zones near the TX/NM line. Temperatures are expected to be cooler tonight with at least some period of clear or mostly clear skies.
A Freezing Fog Advisory has been issued for areas mainly south of I-20, with KLFK, KMLU, KGGG and potentially KSHV being affected by FZFG by 12/07Z. Therefore, a Freezing Fog Advisory has been issued until 9 AM in corresponding portions of Deep East Texas through northwest Louisiana. In areas where freezing fog becomes dense, a thin layer of ice can form on all surfaces including bridges and overpasses making for hazardous driving overnight. Freezing Fog Advisory until 9 AM CST Tuesday for LAZ005-010>014- 017>022. Freezing Fog Advisory until 9 AM CST Tuesday for TXZ149>153- 165>167.
However, most locations are still above freezing (upper 30s in NE AL). Some breaks in this low cloudiness can be seen in western TN and northern MS. This should allow most areas to drop below freezing after midnight and continue to drop into the mid 20s to around 30 degrees in NE AL by daybreak on Tuesday. Expect dewpoints to drop into the lower to mid 20s around daybreak near and west of the I-65 corridor and to around 30 degrees further east. Then temperatures should climb above freezing in most locations. Temperatures should warm quickly with plenty of insolation and should be above freezing across the area by 10 AM.
The Plateau is the surprising warm spot with obs around freezing. Nighttime RGB does reflect some fog over the Plateau and near the AL border, but with those sites reporting temps near or above freezing generally thinking freezing fog will not be too much of a concern as the early morning hours progress. As the low stratus deck from the NW expands eastward, this should help bump temps up a few degrees and eliminate any fog that has developed. If the stratus deck starts to slow down or the Plateau drops a few degrees, freezing fog could become a problem. As of right now though, think we will stay just warm enough where fog has developed that there shouldn't be any widespread freezing fog concerns.
1030 PM MST Mon Jan 11 2021 Current surface map places weak trof across central South Dakota. Flat upper level ridge shifts across the Northern Plains Tuesday as strong trof dives through the Pacific Northwest.
/issued 714 PM EST Mon Jan 11 2021/ Regional surface observations and water vapor satellite imagery are showing the approaching cold front currently sliding through the Florida Panhandle, on track to push through the forecast area overnight and into Tuesday morning. MVFR/IFR ceilings are expected to push into the Tampa Bay area terminals beginning around 08-12z in the wake of the incoming dry cold front, with reduced ceilings expanding into southwest Florida area terminals between 12-15z. The low ceilings are forecast to lift out from north to south during the late afternoon and early evening hours. Winds will turn to the northwest and increase slightly tonight behind an incoming cold front, with wind speeds approaching exercise caution levels offshore. Conditions will subside Tuesday through late in the week as high pressure builds into the Gulf of Mexico from the west.
354 AM EST Tue Jan 12 2021 A weak low pressure system will pass to the south of our area on today. Meanwhile, high pressure will continue to build into the region from the southwest, influencing our weather through the week.
Unlike the previous upper low which brought abundant snowfall to the area, this one will only be accompanied by a few high clouds before it departs to the east later today. After another very cold start to the morning with patchy freezing fog, temperatures will finally rise out of the 30s today thanks to increasing insolation.
300 AM EST Tue Jan 12 2021 The predominant weather feature in the short term will be a large ridge of high pressure, which will influence the weather of eastern Kentucky through the end of the week. We should see highs reach the low to mid 40s this afternoon, which would be 5 to 8 degrees warmer than yesterdays highs. Nearly calm valley winds and clear skies overnight may lead to a modest ridge valley temperature split, so that was incorporated into the forecast lows for tonight.
Will remain more optimistic for clearing across these areas through the night with patchy fog developing as the low level winds subside ahead of an approaching low level trof. With ceilings increasing and drier air mixing in, wl remove freezing drizzle mention from eastern and northern areas through the late night.
1046 PM EST Mon Jan 11 2021 The local air mass is warmer and muggier than 24 hours ago. The Florida Keys lie in an area of weakened gradient flow between the two high pressure cells just southeast of the approaching front.
Some breaks in this low cloudiness can be seen in western TN and northern MS. This should allow most areas to drop below freezing after midnight and continue to drop into the mid 20s to around 30 degrees in NE AL by daybreak on Tuesday. Expect dewpoints to drop into the lower to mid 20s around daybreak in these areas and to around 30 degrees further east. However, most locations are still above freezing (upper 30s in NE AL). Then temperatures should climb above freezing in most locations. Temperatures should warm quickly with plenty of insolation and should be above freezing across the area by 10 AM.
Scattered showers will taper off early this morning as the low pressure system exits off the coast of SE GA. Winds will shift to be northwesterly behind the low pressure system as high pressure builds to the west, which will help usher in cooler air this afternoon and evening. High temperatures will be cool in the mid- to-upper 50s for SE GA due to lingering cloud cover throughout the day, but highs will be close to seasonal values for NE FL in the low-to-mid 60s.
Weak high pressure will keep generally benign weather in place tonight across SoFlo. Light and variable winds will result in no significant wind chill factor, with overnight lows remaining in the upper 50s for interior and northern areas, and in the low-mid 60s elsewhere.
Clouds should finally clear the PAH forecast area by around 12z, and with sunshine and southwest winds, highs today will be much warmer and a little above normal in the middle to upper 40s.
Surface analysis revealed a ridge from southeast ID into northwest NM and a trough over the Northern High Plains. Primary forecast concern through the short term will be the high winds affecting much of southeast WY.
A Freezing Fog Advisory remains in place for our southern zones through 12/14z. With temperatures well into the 20s, freezing fog will remain possible through the morning hours. Freezing fog can pose a danger to bridges and overpasses by potentially depositing a thin layer of ice on them. Despite how beautiful freezing fog can make a landscape, drivers should use caution while out and about. A mid-level trough, currently being analyzed to be situated over northern Mexico and far west Texas will gradually become a closed low. Meanwhile, high pressure will continue to push into our area, leading to a dry forecast for today. By Tuesday night, the closed low will push into the area which will bring an increase in cloud cover from the southwest. Skies will begin to clear through the day Wednesday as the low begins to exit the area.
Guidance tries to bring these east-southeastward toward the area, suggesting the highest chances of getting socked in with clouds are near the I-94 corridor in Wisconsin with decreasing chances westward.
Today Through Wednesday Night Early this morning, high pressure was settling into Arkansas, as the system responsible for the southern Arkansas snowfall yesterday moves off the eastern seaboard. Freezing fog has formed over portions of central and southern Arkansas, and will continue into the morning. At this time, will cover this hazard in the HWO and with an SPS, however we could end up posting a Freezing Fog Advisory if conditions deteriorate. Regardless, conditions should improve after sunrise, with the fog dissipating and temperatures going above freezing by mid to late morning. An upper low currently over northern Mexico will be absorbed into a longwave trough and move eastward Wednesday and Wednesday Night, but we should see little more than increased clouds over southern Arkansas as deep layer moisture will be rather limited with the system.
Some low clouds and patchy fog are possible again tonight into Wednesday morning though there does appear to be a trend for clearing of the low levels into Wednesday. High temps both today and Wednesday will be dependent on low cloud trends and have stayed close to guidance and perhaps a degree or two cooler over the deeper snow back in the northwest cwa. which would yield highs in the low/mid 30s today and upper 30s Wednesday. The low levels remain fairly dry but a few sprinkles or even a light shower is possible especially north of the area. cms 245 AM CST Expecting a fairly warm night for January standards Wednesday night as warmer air is advected into the region ahead of an approaching cold front.
Temperatures across much of the area are in the 40s, except for near freezing temperatures across portions of the northern ranchlands with clear skies. Highs today will range from the low 50s near the coast, due to abundant cloud cover, to the mid 50s across the west. Light winds and less clouds should support good radiational cooling and allow temperatures to fall into the low to mid 30s across the northern ranchlands tonight. Highs on Wednesday are expected to range from the upper 50s at the beaches to the low to mid 60s inland with skies clearing.
A broad southern stream mid and upper level trough will cover the Southeast United States, the entire Gulf of Mexico and the Florida Peninsula over the next several days.
Temperatures are currently around the freezing mark for most locations. Continue to see some areas of patchy freezing fog but do not expect freezing fog is causing many issues with visibilities around 2-6 miles. Black ice will continue to be possible over the next hour or so but should see these conditions improve as the entire forecast area rises to above freezing by 10 AM. These persistent clouds will slow the warming this morning but highs will still top out in the low to mid 40s for most locations. Clear conditions and a cool, dry air mass will result in a good setup for radiational cooling tonight as low temperatures will fall back into the lower 20s. Thereafter, expect a warming trend as high pressure builds in and shifts just east of the area, inducing a southerly flow.
At the surface, a wave of frontal low pressure was initially located near the Georgia/Florida border this morning.
552 AM EST Tue Jan 12 2021 Overcast skies and lingering showers will continue this morning as low pressure accelerates off of our coastline.
Upper level analysis places ridging from the Great Basin towards the Northern Plains, with flow splitting to the south with weak low noted over the desert southwest. With the exception of high clouds streaming through the ridge, quiet weather remains over our area at this time. For today, ridge will continue to be the main influential factor for our area, keeping conditions quiet and warm. Will continue with the well above average forecast as models continue to push thermal ridge over our area, along with downsloping westerly winds. The only fly in the ointment that may hold back high temperatures a bit will be the high clouds streaming through.
814 AM EST Tue Jan 12 2021 Overcast skies will linger into today as rain and low pressure accelerates off to the northeast.
504 AM EST Tue Jan 12 2021 [Through 06Z Wednesday] Low stratus will continue to overspread the terminals early this morning as a cold front crosses the area. SSW winds 5-8 kts early this morning will shift WNW through midday as the cold front slides south across the area with speeds increasing to 6-10 kts. Scattered showers will taper off early this morning as the low pressure system exits off the coast of SE GA. Winds will shift to be northwesterly behind the low pressure system as high pressure builds to the west, which will help usher in cooler air this afternoon and evening. High temperatures will be cool in the mid- to-upper 50s for SE GA due to lingering cloud cover throughout the day, but highs will be close to seasonal values for NE FL in the low-to-mid 60s.
The clearing happened suddenly last evening due to just enough mixing in the low levels to allow that dry air above the inversion to get down to the ground level. The warm air advection will persist through Wednesday, so this should strengthen an inversion layer which would put us right back in the low stratus.
It will be a cold day with northwest winds around the ridge. Highs for the most part will be in the 40s except for the far southeast part of Central Alabama in the lower 50s. This will be because a new upper low will move northeast out of Texas toward Alabama tonight into Wednesday.
With temperatures well into the 20s, freezing fog will remain possible through the morning hours. Freezing fog can pose a danger to bridges and overpasses by potentially depositing a thin layer of ice on them. Despite how beautiful freezing fog can make a landscape, drivers should use caution while out and about. A mid-level trough, currently being analyzed to be situated over northern Mexico and far west Texas will gradually become a closed low. Meanwhile, high pressure will continue to push into our area, leading to a dry forecast for today. By Tuesday night, the closed low will push into the area which will bring an increase in cloud cover from the southwest. Skies will begin to clear through the day Wednesday as the low begins to exit the area.
The mid-level trough centered over west Texas will move slowly eastward throughout the day, but with dry air in place, little cloud-cover is expected.
Snow levels will be above 7-8k ft, so accumulating snow will generally be limited to the highest peaks. Strong ridging builds into the region late in the week and into the weekend bringing a return of dry weather, and possibly more extensive late night and morning fog.
Below average temperatures will continue early this week before high pressure brings a strong warming trend starting Wednesday. Chilly mornings will give way to temperatures warming to well above average the second half of the week as high pressure builds in from the west.
332 AM CST Tue Jan 12 2021 The primary forecast concern will center around the high winds behind the Wednesday night cold front.
Dry weather and foggy mornings this week as high pressure prevails.
326 AM MST Tue Jan 12 2021 Currently, eastern Utah and western Colorado are situated under a ridge of high pressure, with relatively clear skies and quiet conditions. The forecast for the high temperatures today is a bit tricky. Tonight will be very similar to last night, though a few degrees warmer due to increasing high cloud cover. Wednesday will see the ridge still exerting its influence, and high temperatures should be right around average.
The primary forecast concern will center around the high winds behind the Wednesday night cold front.
(Today and tonight) Continued dry weather, with warmer afternoon highs today. An upper level low currently south of El Paso early this morning, will move northeast into central Texas by this evening. The upper level low and cloud cover will keep temperatures from warming up too much, with highs in the upper 40s to lower 50s.
Temps below freezing tonight for a several hours in north GA. Will need to monitor for possible freezing fog after midnight tonight. Perhaps a rare, unfavorable vertical alignment of sfc and upper low is to blame. SNELSON A moisture starved upper level trough will move across the area Wednesday night with no significant precip expected.
426 AM MST Tue Jan 12 2021 Currently, eastern Utah and western Colorado are situated under a ridge of high pressure, with relatively clear skies and quiet conditions. The forecast for the high temperatures today is a bit tricky. Tonight will be very similar to last night, though a few degrees warmer due to increasing high cloud cover. Wednesday will see the ridge still exerting its influence, and high temperatures should be right around average.
553 AM MST Tue Jan 12 2021 Flat ridge over the northern Rockies with chinook arch clouds spreading across the state. A strong jet comes with the wave and will likely mix down with the benefit of a cold front and a few showers.
328 AM CST Tue Jan 12 2021 Expanding low level thermal ridge will be expanding across the southern plains with downslope flow over the next couple of days, leading to a notable warming trend today and Wednesday.
423 AM MST Tue Jan 12 2021 12Z TAF CYCLE An area of IFR freezing fog within the Pecos River Valley north and east onto the Caprock will burn off gradually aft sunrise.
The clear skies, light winds, and areas of snow cover on the plains have allowed temperatures to fall with teens for the lower elevations, and below zero for the San Luis Valley. upper level ridging will stretch from southern California, northeast across Colorado through tonight. High temps Wed are expected to be 10-15 deg above average over the plains, and maybe around 5-10 deg above average in the high valleys. As upper level ridging occurs over the area Fri and Fri night, the winds will decrease.
408 AM MST Tue Jan 12 2021 Latest analysis shows a flat upper ridge over the region. At the surface, the forecast area is located between high pressure to the southwest and a weak trough over the eastern Dakotas/Nebraska. A low pressure system tracking eastward across the Canadian prairie provinces will swing an upper trough and an associated surface cold front across the forecast area from late Wednesday afternoon through Wednesday night. Initially the strength of low level cold advection and surface pressure rises behind the front will be on the low end for high wind criteria, however with winds at the top of the mixed layer rising to 55-60kts, steep low level lapse rates are expected to aid in momentum transfer down to the surface increasing the chances for strong and gusty winds overnight.
313 AM PST Tue Jan 12 2021 An area of low pressure will brush by our region today into Wednesday bringing some light rain and snow to mainly northeast California and far northwest Nevada. Winds will also increase, especially across ridges. High pressure will build late week into the weekend with light winds, weak to moderate inversions, and mild temperatures. An increase in winds is expected across ridges today through Wednesday as strong 700 hPa flow increases to around 35-40 kts, mainly north of the central Sierra. We kept winds increased similar to the day shift, with gusts approaching 80-85 mph at times across the higher peaks of the Sierra. Some minor travel impacts are possible over the higher passes of western Lassen County and Cedar Pass this morning and early this afternoon as snow levels will be the lowest.
/issued 336 AM CST Tue Jan 12 2021/ A deep, positively-tilted trough is moving slowly across the Southern Rockies this morning while yesterday's snow-maker accelerates toward the Mid-Atlantic States. The synoptic pattern throughout the week will be highlighted by a semi-permanent trough over the east and a ridge building off the CA coast, typical of a +PNA pattern. Cloud cover continues to slowly clear from west to east this morning and temperatures have dropped into the low/mid 20s. Expect warmer temperatures with highs in the mid 40s. South winds will continue on Wednesday as the trough currently moving across the Southern Rockies traverses the region.
Weather for us will remain dry and tranquil as we remain within weak northwest flow associated with broad northern stream trofing centered through the Great Lakes. Meanwhile a potent southern stream upper low/trof currently located in the northern Mexico will remain south of us moving across the southern Plains through the lower MS Valley and into the Deep South by late Wednesday.
High pressure has moved over South Texas and winds across our CWA are generally light. Patchy fog has developed over the eastern part of the CWA and temperatures are at or below freezing. An upper level low will move across Texas today, but high pressure will still dominate in the low levels.
Modest downslope west winds and an minor increase in heights as an upper low near El Paso early this morning shifts southeastward toward Del Rio point to further warming on top of yesterday's. Will again trend toward the cooler end of guidance and below there for southern zones where snow cover is more significant. Will continue to watch for some freezing fog advecting in from eastern New Mexico into the western zones this morning.
/issued 425 AM EST Tue Jan 12 2021/ The cold front is just to the west of the area this morning, with some light rain/sprinkles in place across the southern half of the area. Another upper trough then moves across the northern Gulf Wednesday, and moving over the area Wednesday night, with showers lifting over the area through the period.
A general warming trend is foreseen today and Wednesday as mid level heights, low level thicknesses, and low level temperatures all rise in response to an upper level ridge of high pressure slated to advance eastward into the southwest states during this time period. Warmer temperatures are in store Wednesday with max values in the upper 50s to lower 60s expected.
643 AM EST Tue Jan 12 2021 Weak low pressure near the Gulf Coast will move northeast and spread rain into the area through the overnight. The low pressure system will move northeast of the area Tuesday.