Aikyam-Lab/Synoptic-Bench huggingface dataset:
309 AM CST Tue Jan 28 2020 An upper trough extends south across the High Plains early this morning. While winds are very light across most of western Nebraska, a Pacific cold front is bringing gusty northwest winds across the southern panhandle east into Ogallala. Temperatures continue to range mostly in the lower 30s most areas. The upper trough axis will move east today and begin to exit the areas zones by 00Z Wednesday. There will be a chance for light snow today just ahead of the trough axis. On Wednesday, another upper trough will drop trough Montana, into the Dakotas and Wyoming, bringing mostly cloudy skies to western Nebraska.
These ceilings should begin to lift this afternoon as a strong upper low shifts to the east of the region. The other issue is strong north winds behind the front and enhanced by the upper low. /issued 356 AM CST Tue Jan 28 2020/ We are seeing an impressive radar and satellite presentation of the closed low travelling across the TX Panhandle early this morning; however, totals across the West Texas Mesonet have been meager to none. A fairly strong H7 & H85 jet will wrap around the backside of this low as it departs east today, aiding in bolstering the winds of the cold front. As clouds clear from west to east, we'll see a window for mixing across our western counties, which is where the highest winds will be seen.
Lots of cloudiness continues to stream into NorCal from the west and southwest as another trough swings onshore to our north across the PacNW. A ridge of high pressure builds in beginning mid-week resulting in dry and mild conditions.
Feature will be accompanied with a cold front advancing across the region mainly post-midnight. Temperatures though will be a bit cooler.
323 AM MST Tue Jan 28 2020 Warm frontal precipitation is spreading into the Northern Rockies, producing mountain snow, and rain/snow/freezing rain in the valleys of central Idaho and western Montana. Winter Weather Advisories remain in effect for the high terrain, including mountain passes, and for northwest Montana. The cold front is still expected to pass during this evening.
356 AM CST Tue Jan 28 2020 We are seeing an impressive radar and satellite presentation of the closed low travelling across the TX Panhandle early this morning; however, totals across the West Texas Mesonet have been meager to none. A fairly strong H7 & H85 jet will wrap around the backside of this low as it departs east today, aiding in bolstering the winds of the cold front. As clouds clear from west to east, we'll see a window for mixing across our western counties, which is where the highest winds will be seen.
A cold front Tuesday will cross the state through the evening with showers increasing from northwest to southeast.
A deamplifying upper ridge over the High Plains will move east through the day Wednesday with an upper trough extending from the western part of the Dakotas to southwest of the Four Corners region.
645 AM EST Tue Jan 28 2020 High pressure will move across the region through Tuesday night.
310 AM CST Tue Jan 28 2020 For this morning, still dealing with low stratus, fog and some patchy drizzle/freezing drizzle across the forecast area. At this time, do not feel that the patchy drizzle/freezing drizzle is causing any impacts, so will not issue any short fuse advisory for this morning. Did keep mention of patchy drizzle/freezing drizzle in through 15z today for portions of central/east central and southeast MO as well as southwestern IL. As for temperatures through the period, expect another cold night tonight with lows in the low 20s to low 30s.
1145 AM CST Tue Jan 28 2020 Primary forecast focus is a low pressure system producing light snow across much of the area. This is due to the aforementioned low pressure system south of the area.
1153 AM CST Tue Jan 28 2020 Updated aviation portion for 18Z TAF issuance and new information added to update section Freezing drizzle has been reported over parts of northeast Wisconsin this morning. Freezing drizzle is also currently occurring here at WFO- GRB, but it is light. Kept freezing drizzle in the forecast for parts of northeast and east-central WI through early afternoon, and issued a Special Weather Statement to cover the travel hazards for the next few hours. Skies should remain cloudy throughout the day with cold air advection causing slightly cooler temperatures today as highs only reach the middle to upper 20s during the afternoon hours. Cooler temperatures are expected tonight despite the continued cloud cover as overnight lows sink to around 10 across the north, with middle to upper teens across east-central Wisconsin.
252 PM CST Tue Jan 28 2020 (Tonight and Wednesday) Upper trough will move off to the east tonight, with short wave ridging aloft developing on Wednesday.
Weak troughing over the eastern half of the U. is continuing to bring in cooler westerly/northwesterly air.
Otherwise, the Eastern Pacific Ridge will build over the region throughout the week.
1011 AM MST Tue Jan 28 2020 Weak ridging will start the day across the state, with a quick return of moisture ahead of the next system.
(Wednesday through next Tuesday) Longwave trough still expected to affect the late week period with mainly plenty of cloud cover. Still cannot rule out period of light mid-level based showers as trough passes, but will keep mentionable pops across the Red River valley and northern Texas counties.
A very pleasant afternoon across central Alabama with clear skies, light winds, and temperatures in the lower 60s. Clouds will quickly overspread the area tonight in advance of an approaching short wave trof. Fog should not be an issue tonight due to cloud cover and much drier conditions in the low levels.
1144 AM CST Tue Jan 28 2020 An upper trough extends south across the High Plains early this morning. While winds are very light across most of western Nebraska, a Pacific cold front is bringing gusty northwest winds across the southern panhandle east into Ogallala. Temperatures continue to range mostly in the lower 30s most areas. The upper trough axis will move east today and begin to exit the areas zones by 00Z Wednesday. There will be a chance for light snow today just ahead of the trough axis. On Wednesday, another upper trough will drop trough Montana, into the Dakotas and Wyoming, bringing mostly cloudy skies to western Nebraska.
232 PM CST Tue Jan 28 2020 Satellite imagery shows mostly clear skies over the state of Alabama with cirrus streaming off of a low pressure system currently over Texas. Building cloud cover will keep overnight lows mild, only dropping to the low 40s to upper 30s.
359 PM EST Tue Jan 28 2020 High pressure will prevail through tonight.
Otherwise, a dry afternoon is in place, with temperatures in the lower 20s northwest to near 30 east. A cut off low pressure system is found in Oklahoma, with a upper trof extending north to central North Dakota. This trof will pass through our region tomorrow. The low level stratus will not change much over the next 24 hours, and with that, temperatures should remain stuck in the 20s as well. After Noon, saturation really will wane at mid levels, with either dry conditions following, or patchy light freezing drizzle. By later afternoon, winds will increase somewhat from the northeast at the OK low pressure moves east.
Strongest winds are expected across the northern portions of the county, roughly along and north of the Highway 90/57 corridor. Ceilings will quickly transition to VFR for all terminals by 19Z as a cold front reaches the Interstate 35 corridor. Gusts will likely persist into the evening and overnight hours, with winds and gusts relaxing by mid-morning Wednesday as surface ridging builds into the region.
133 PM CST Tue Jan 28 2020 So far, the possible patchy freezing drizzle forecast overnight has not yet materialized, and it may not. A low pressure system moving by to our south is forecast to bring some generally light precipitation to our region tonight and Wednesday. Best guess is that up to an inch of snow/sleet may occur in the higher elevations of the MO Ozark Foothills. During this time, surface temps hovering near the freezing mark and relatively warm road surface temps should limit travel impacts, but elevated surfaces could still develop slick spots. For now, we still have likely PoPs for mainly rain over southern parts of the PAH forecast area as temps rebound to well above freezing.
139 PM CST Tue Jan 28 2020 A very slow moving warm front continues to move eastward across central North Dakota, with an area of light snow across the James River Valley.
1228 PM EST Tue Jan 28 2020 Aviation - Some light precipitation expected today - Snow in the forecast for Fri/Sat - Temperatures stagnant much of this week, warming into weekend -- Some light precipitation expected today -- We are thinking we will see some patchy freezing drizzle or flurries today, but we are not expecting any impact.
1244 PM EST Tue Jan 28 2020 Very light snow and patchy drizzle and freezing drizzle can be expected early this morning that may cause a few slick spots on roads.
243 PM CST Tue Jan 28 2020 Tightly wound upper level low pressure center near Vernon, Texas edging slowly east along the Red River late this afternoon.
349 PM EST Tue Jan 28 2020 An upper level trough remains across the eastern US this afternoon, with lots of low level cloud cover from New England, across the Great Lakes and into the Ohio River Valley. The moisture trapped beneath the low level inversion will likely spread back to the south and west overnight with low clouds returning to the areas which saw the clearing today.
329 PM EST Tue Jan 28 2020 Light winds will turn northeast as high pressure builds north of the region tonight.
The northern portion of the pattern had a narrow upper trough over the northern plains in phase with the closed low to the south. Another upper trough was moving over the northern Rockies. Surface obs show weak ridging nosing into the forecast area from the Upper Midwest with a weak trough across the Dakotas. For tonight, models continue to show some modest frontogenesis as the upper trough passes overhead. The closed low should remain to the south. So the forecast area is kind of in between the precip to the south and a potential band of light snow with the upper trough.
An upper level trough over the Pacific Northwest this morning will pass through the Great Basin tonight through Wednesday. High pressure will build back across the area late into the week, and remain through the upcoming weekend. A north-northwesterly flow aloft is in place over Utah this morning, with a trough moving across the PacNW and NorCal. Some light precipitation is possible with the warm advection, but the bulk of precipitation will arrive with the trough. The trough is still progged to split as it crosses into the Great Basin this afternoon. That said, expect precipitation to increase across northern Utah during the second half of the afternoon as the trough approaches the area and temperatures begin to cool aloft, allowing for steepening lapse rates.
Skies should begin to clear somewhat in the west as the storm system moves east, but with fresh snow cover, clearing skies and light winds, will have the potential of freezing fog Wednesday morning.
Temps are forecast to rise to the lower 70s from Orange northward and mid to upper 70s.
Some of the high resolution model runs suggest daytime heating coupled with some dynamic forcing will produce surface based convection, with the most intense potentially forming in Southeast Oregon then moving northeast into Southeast Washington and Southern Portions of North Idaho this afternoon.
1240 PM EST Tue Jan 28 2020 High pressure north of the region will gradually shift a light wind from northwest to northeast through Wednesday.
1048 AM CST Tue Jan 28 2020 Latest WV imagery and UA analysis shows upper low near the SW corner of OK. An impulse embedded within southwest flow around the periphery of the low is producing a band of showers that extend from W LA acrs SE TX toward Galveston. Additional showers and possibly a few isolated tstms are expected to develop acrs TX through the aftn in association with the main low pres system and frontal boundary, with the highest chcs in our area still expected overnight as the system moves east. Feature will be accompanied with a cold front advancing across the region mainly post-midnight. Temperatures though will be a bit cooler.
206 PM CST Tue Jan 28 2020 Another day of stratus, trapped under subsidence inversion of incoming mid-level ridge. The ridge of high pressure moves overhead tonight with stratus remaining entrenched across the area. Some warm air advection/isentropic upglide occurs ahead of a mid-level trough moving through the Dakotas into MN/IA. The Northern Plains trough continues to push east into the area Wednesday. A weak ridge of high pressure builds in Wednesday night for a quiet/cloudy night.
146 PM MST Tue Jan 28 2020 Current surface map places warm front into central South Dakota. Upper trof currently approaching the Rockies slides into the plains on Wednesday.
A Special Weather Statement remains in effect to alert people of the possibility of the freezing fog through the morning. ABM Chattanooga Airport, TN 38 48 37 54 39 / 30 30 30 10 0 Knoxville McGhee Tyson Airport, TN 35 47 38 50 37 / 10 30 40 10 0 Oak Ridge, TN 34 46 37 51 37 / 10 30 30 10 0 Tri Cities Airport, TN 30 43 36 47 34 / 10 20 30 10 0.
Lows in the mid to upper 30s expected inland Tonight, with readings in the lower to mid 40s near the coast.
Look for light precipitation to begin developing mainly after midnight, with some snow possible in the colder regions of the Highland Rim and Cumberland Plateau. Still, temperatures will remain above freezing across Middle Tennessee except at the highest elevations. Look for the rain to end by tomorrow evening as the upper trough swings across the mid state.
Outside of the fog, today will be quiet, but rain chances will increase from west to east this evening as a low pressure system over Texas begins to approach the ArkLaMiss. The clear skies have allowed temperatures to radiate several degrees cooler than yesterday's crossover temperatures, so at least patchy fog has developed in most places. Low clouds through the morning will give way to an approaching shield of mid-level clouds by the afternoon as a low pressure system edges eastward from Texas. Warmer temperatures can be expected tonight with winds from the east and increased cloud cover.
Tonight and Wednesday An area of light freezing drizzle and flurries was gradually decreasing across the Fox Valley/lakeshore areas this afternoon as mid-level WAA weakened. The main forcing will be along the low-level convergence zone near the lakeshore. Went a few degrees warmer than the previous forecast for tonight's lows, with readings in the teens and lower 20s.
Meanwhile at the low levels, the freezing line and wet bulb zero line currently extend from the Kansas border northwest of Alva to near Seiling and Cheyenne. /26 (Wednesday through next Tuesday) Longwave trough still expected to affect the late week period with mainly plenty of cloud cover. Still cannot rule out period of light mid-level based showers as trough passes, but will keep mentionable pops across the Red River valley and northern Texas counties.
1150 AM CST Tue Jan 28 2020 For this morning, still dealing with low stratus, fog and some patchy drizzle/freezing drizzle across the forecast area. At this time, do not feel that the patchy drizzle/freezing drizzle is causing any impacts, so will not issue any short fuse advisory for this morning. Did keep mention of patchy drizzle/freezing drizzle in through 15z today for portions of central/east central and southeast MO as well as southwestern IL. As for temperatures through the period, expect another cold night tonight with lows in the low 20s to low 30s.
127 PM EST Tue Jan 28 2020 High pressure will move across the region through Tuesday night.
Morning satellite imagery showing sharp upper trough moving into w-central Oregon this morning. The steady stratiform precipitation ahead of the trough that crossed the region early this morning is now advancing into central Idaho. Scattered showers will fill in across the area through this afternoon as the upper low center advances eastward.
1014 AM MST Tue Jan 28 2020 A north to south oriented band of light snow will continue to move eastward across western South Dakota early this morning as the upper trough crosses the region. Subsidence behind the departing upper trough and a ridge building to the west will then clear out the clouds from west to east with mostly sunny skies expected through the rest of today. High temperatures will be slightly warmer than the seasonable averages for today and on Wednesday.
1223 PM EST Tue Jan 28 2020 [Through 18Z Wednesday] VFR conditions are expected to prevail through much of the period ahead of the next low pressure system. Lower CIGs at MVFR levels are expected to increase from west to east late tomorrow morning and early afternoon ahead of the aforementioned low pressure system. A weak pressure gradient will be in place today with gentle northerly surface winds as high pressure will reside just to our northwest.
Skies should begin to clear somewhat in the west as the storm system moves east, but with fresh snow cover, clearing skies and light winds, will have the potential of freezing fog Wednesday morning. (Wednesday through next Tuesday) Longwave trough still expected to affect the late week period with mainly plenty of cloud cover. Still cannot rule out period of light mid-level based showers as trough passes, but will keep mentionable pops across the Red River valley and northern Texas counties.
/Tonight through Wednesday Night/ Upper trof axis movg across TX this aftn will continue its slog ewd across our region tonight into early Wednesday.
Latest hi-res model output along with some of the med-range solutions indicating that another round of convection will develop along the cold front this aftn, as the base of the trof begins to move ovhd. /Today through Wednesday/ A surface and upper-level trough will shift east across the region today supporting showers with isolated thunderstorms areawide.
247 PM EST Tue Jan 28 2020 Upslope pattern again tonight followed by a weak ridge on Wednesday.
Borderline MVFR/VFR stratocu lingers as the wind direction brings some added clouds from Lake Huron through Wednesday morning and even into the afternoon as current conditions show plentiful coverage within high pressure north of the lake. Precipitation is limited to a brief mix of light snow or rain showers as temperature remains above freezing through the day. Forecast will continue to simply call for flurries at times today through early tonight, leaning on recent model soundings which indicate the top of the moist layer will reside within a cold enough layer to maintain ice in the column versus remaining in liquid form and translating into pockets of drizzle or freezing drizzle. Subtle cold air advection in the wake of this perturbation will ease readings down into the lower to middle 20s by Wednesday morning.
Tomorrow an upper low dives south into Arizona and will turn east tomorrow night across northern Mexico.
1233 PM EST Tue Jan 28 2020 Weak high pressure will take hold of the area today through Wednesday. High pressure will build into the region today and tonight.
428 PM MST Tue Jan 28 2020 Current surface map places warm front into central South Dakota. Upper trof currently approaching the Rockies slides into the plains on Wednesday.
549 PM CST Tue Jan 28 2020 Low pressure in east Texas will continue to work east and move through Louisiana tonight. This low will move into the Gulf of Mexico Wednesday afternoon.
A weak cold front moving across the area today has brought some light rain showers to the Valley, Delta and foothills. A ridge of high pressure builds in beginning mid-week resulting in dry and mild conditions.
Rainfall was expanding over central and southern MS in response to better upper diffluence and mid level moisture transport in advance of the upper low along the Red River. It will help to begin moistening the low to mid levels, so will maintain the low PoP in later tonight.
303 PM CST Tue Jan 28 2020 Ripples of short wave troughs have seemed to be the trend over the last couple of weeks for the Deep South and will continue in the near term. A quickly moving short wave trough will push through the ArkLaMiss tonight and into tomorrow bringing in rain showers. A low pressure system tracking through the ArkLATex, which is associated with this trough will help bring some showers to the region earlier today, as locations in the west are already currently experiencing some light showers. Though this is a quickly moving system and expectations of impactful weather aren't a concern, wouldn't rule out some embedded thunder for portions in the south where they are closer to the area of low pressure/instability.
This allowed many of us to climb into the lower 70s but also dry out as dewpoints dipped into the 30s north of I-4.
616 PM EST Tue Jan 28 2020 Upslope pattern again tonight followed by a weak ridge on Wednesday.
Currently, Do not expect to see much more a few tenths of an inch outside of the mountains and 3-6 inches over the high peaks of the Snowys and Sierra Madres.
340 PM CST Tue Jan 28 2020 A closed low pressure system currently over southwest Oklahoma will continue shift east/southeast today bringing light showers to the area. Temperatures should be warmer tonight compared to last night with low temperatures in the 40s south and west of the Mississippi River. Eastern Arkansas and the Missouri Bootheel will still be cooler than the rest of the area but temperatures should dip down into mid 30s. The system will move towards the east coast by Wednesday and another trough will dive southeast from the west coast. This will place our area under a ridge bringing dry weather.
612 PM EST Tue Jan 28 2020 Moisture will increase ahead of low pressure tracking eastward along the northern Gulf Coast Wednesday. The low will shift off the Southeast Coast Wednesday night.
For KGUY, areas of freezing fog, low cigs, and attendant low vsbys are forecast to develop later tonight and persist until around mid morning Wednesday, then improve to VFR conditions by 18Z Wednesday. Latest satellite and radar trends indicate that our upper level low is exiting the area, with the main 500mb low center now over the Red River Valley north of Wichita Falls. This will setup some decent radiational cooling with some potential for freezing fog development, especially in the areas where snow amounts were highest. For now, we are issuing a Freezing Fog Advisory for the far northeast Texas Panhandle and Eastern half of the Oklahoma Panhandle, as this is where confidence is sufficient for widespread dense freezing fog to occur. Going into the daylight hour tomorrow, the upper level pattern will transition ahead of the next 500mb low pressure.
Generally, lows ranging from the low 40s north of the I-4 corridor to the upper 50s along the Treasure Coast.
355 PM CST Tue Jan 28 2020 Clearing skies in the wake of the storm system, radiational cooling, a very moist and cool boundary layer, light winds and snow cover will set the stage for a dense freezing fog event starting as early as 9 pm and persisting until after 9 am before the sun warms the surface. Opted to issue a dense fog advisory for all but the southeast and extreme west, and mention freezing on surfaces in the discussion part of the product (TOPNPWDDC). Similar conditions will exist Wednesday night, with dense freezing fog likely once again.
The low looks to split from the main trough Wednesday morning into the afternoon as snow showers spread southward across the central and southern portions of the area, with the low diving into southern Arizona and Mexico.
/issued 243 PM CST Tue Jan 28 2020/ Tightly wound upper level low pressure center near Vernon, Texas edging slowly east along the Red River late this afternoon.
Given very light QPF and marginal temps above freezing, snow accumulations will be minimal.