Aikyam-Lab/Synoptic-Bench huggingface dataset:
436 AM CST Sat Jan 4 2020 Once again high pressure is settling in across the region this morning. This afternoon will see mostly clear skies as temperatures recover into the low to mid 60s along the I-10 corridor and near 60 in central Louisiana and the lakes region of southeast Texas. The weather will remain quiet into Sunday though winds will swing around to the south as high pressure moves over the Florida Panhandle.
306 AM CST Sat Jan 4 2020 Weak ridging and WAA prevail today as southerly winds bring warmer than average temperatures into the area. The main impacts this weekend will be attached to our next clipper system and associated cold front that will push through the region late tonight and through the day on Sunday. The current forecast will keep the highest wind gusts to higher elevations west of the Red River Valley. Overall impacts will remain toward the low end of the spectrum (although just a bit of snow and drifting does lead to hazardous travel at times). Guidance indicates zonal flow with multiple long wave troughs propagating from west to east across the CONUS.
Modest cold advection within veering NNW flow will be offset by filtered insolation through the existing stratus deck to support neutral surface temperature trends today as temperatures stagnate in the low to mid 30s. However, deepening of the cold airmass will support steepening diurnal lapse rates and the potential for light snow showers as the mid-level trough shifts through the area today. Only noteworthy wx to speak of during the next several days is the well-advertised sheared/elongated trough axis which will lift through the Lower Peninsula on Sunday afternoon. Light northerly winds will slowly back to the northwest this morning and then hold westerly throughout the day with increasing strength as a low pressure system over the upper Ohio Valley migrates toward the East Coast.
423 AM CST Sat Jan 4 2020 Early morning GOES water vapor imagery showed a compact upper low centered near St. 500mb temps will drop to -25C over northern portions of the Midsouth, near the passing trof axis. Skies should quickly clear behind the trof axis and with loss of surface heating. Southerly flow will return tonight around the northwest periphery of a 1028mb surface pressure ridge.
421 AM MST Sat Jan 4 2020 Large high pressure moving through the area will result in dry weather and slightly above normal highs through the weekend.
622 AM EST Sat Jan 4 2020 A cold front has passed east of the area but showers will continue through morning as an upper trough moves over the region.
323 AM CST Sat Jan 4 2020 Upper trough passing out of TX into the MS Valley this morning with high pressure building in from the west. Later today a mid latitude trough moves across flattening out the ridge. Another trough moves ashore CA Sunday and quickly moves east pushing the ridge farther southward.
A very wet spell will end today, as a cold front continues moving across the area. However cooler air poised just to the west and northwest will move in, and basically keep temperatures at what they are now, but falling in the later morning and afternoon as cold air advection really takes hold. This would affect mainly the higher elevations of the Cumberland Plateau in southern middle Tennessee, or far NE Alabama for a short period this afternoon. One such system as an upper trough will amplify as it moves across the region today into Sunday. Colder air west of this trough will only have a brief time to impact this region, with low temperatures tonight only cooling to around 30. Low temperatures Saturday night will be a bit warmer into the low/mid 30s.
511 AM CST Sat Jan 4 2020 Periods of light snow will continue across central Illinois this morning, as an upper low quickly tracks southeast across the state. Upper level low quite evident on water vapor imagery early this morning, centered just north of Quincy at 2 am. Radar mosaics earlier showed a well defined swirl as well, though the portion north of the low has significantly been fading as of late. By late morning, the upper low/trough will be near the Wabash River, and lingering snow should be quickly ending through midday.
/This Afternoon/ The morning visible satellite imagery indicates a diminishing area of low AC over portions of Scntrl AR/NE LA, associated with a sharp, well-defined upper trough diving SE across the MS Valley. With the trough axis expected to quickly exit the NE sections of the region by midday, a sunny sky is expected for the remainder of the day given the very dry air mass in place in wake of the departing trough. Meanwhile, sfc ridging is noted over much of OK and N TX this morning, which will drift shift SE into SE OK/ECntrl TX this afternoon, and become centered over the region this evening.
315 PM EST Sat Jan 4 2020 A secondary, northern stream cold front will move across central NC this afternoon and evening, allowing plentiful clearing and gusty winds to persist through Sunday morning.
Behind this front today, ridging will build across the Great Lakes and southward into the Deep South.
226 PM CST Sat Jan 4 2020 As of 20Z Saturday afternoon midlevel ridging was overspreading the Plains with the departing trough to the east and a second trough across the Rockies. With the deepening lee trough, a 40-50 LLJ is progged to develop through the evening hours. This will also set the stage for a mild night -- for January standards -- with lows only reaching the lower to middle 30s. The aforementioned lee trough will swing through the CWA late tonight into Sunday morning, shifting winds to the north.
Big mid level trough is still on its exit phase from the area, so northwest flow aloft will continue for the next several hours before it gives way to more of a ridge for Sunday.
Windchill values are currently hovering at the freezing mark and will remain near there through this afternoon as Canadian high pressure continues to build in from the northwest. Due to the lower column being especially dry, only mid to upper level clouds are expected. Expect temperatures to plummet after sundown, falling to below freezing by tomorrow morning. /issued 423 AM CST Sat Jan 4 2020/ Early morning GOES water vapor imagery showed a compact upper low centered near St. 500mb temps will drop to -25C over northern portions of the Midsouth, near the passing trof axis. Skies should quickly clear behind the trof axis and with loss of surface heating. Southerly flow will return tonight around the northwest periphery of a 1028mb surface pressure ridge.
Scattered rain/snow showers will transition to all snow through the evening as an upper trough currently over the Ohio Valley transitions across the region. The exception is in the ridges E-SE of PGH where orographic enhancement will maintain snow showers into Sunday morning. In general one to three is forecast in the higher terrain with highest amounts across Tucker county WV where two to four and (locally higher amounts) are forecast. Increasing subsidence in the wake of the upper trough will result in snow tapering off Sunday morning. A fast moving trough is then progged to approach and cross the region Sunday night which will increase snow shower chances again. Accumulations should be an inch or less in general outside of the ridges and along/north of the I-80 corridor where 1-2 is forecast at this time.
1006 AM MST Sat Jan 4 2020 Latest analysis shows an upper ridge building over the region from the west. At the surface, high pressure is centered over western Colorado with a lee side trough to the east of the Rockies. A cold front will enter the northwestern parts of the forecast area late this afternoon and will rapidly move southeastward across the region tonight. With the lack of snow cover over parts of northwestern South Dakota and along the northern and eastern foothills, the Grassland Fire Danger will reach the High to Very High categories over parts of those areas this afternoon. The next upper trough will cross the area on Sunday night.
The mid level trough axis located over our eastern cwa this afternoon will shift east tonight. At the surface, the pressure gradient will slacken tonight as high pressure drifts by to our south. A dry cold frontal passage will occur later Sunday/Sunday night.
/28/ The sun has returned to the region as the upper trough moves across the area. It is bringing a wind shift out of the northwest and will scour out the last of the low clouds and light rain showers through the morning hours. Building high pressure with clear skies and light winds overnight will allow for good radiational cooling, although wet ground conditions may prevent ideal conditions for temperatures to drop too low.
Upper ridging will build over the region today pulling up some warmer air on southwest surface winds ahead of an incoming front. Winds could mix down in the higher elevations west of the Missouri and then again along the Coteau while missing much of the rest of the area. Quieter, but cooler, conditions are expected for Sunday as hig pressure builds in at the sfc.
A quick moving mid level trough and associated surface reflection will approach late in the period.
Highs Sunday still look to reach the 60s for most, with upper 50s possible in the higher terrain and northern Lea county, and lower 70s across portions of the Stockton Plateau and Rio Grande Valley.
Still looking like, with upper trough passage expected this afternoon, a good chance of a wintry mix of pcpn possible across higher elevations of Cumberland Plateau Region late afternoon and early evening.
Temperatures will be cooler with highs near 30 north to the low 40s south - still above normal.
Freezing Rain is being reported along I-90 from St. Temperatures should mix out and warm above freezing later this morning.
A dry cold front will be approaching near the end of this forecast period.
Ridging will build over the southeast tonight allowing for clear skies and colder overnight temperatures. Continued to lean on the cooler side of guidance with a light freeze expected across the northern half and near freezing temperatures across our south. Winds will be noticeably lower tomorrow and gradually become southerly as the high pressure centers over the northwestern Gulf and drifts eastward. At the same time, a nice, sunny day is expected to finish out the weekend with highs in the low 50s northeast to upper 50s southwest.
Light winds will become light south tonight, with a cold front and wind shift to the north across northeast OK toward 18Z.
An upper low is pushing into south central KY, and some earlier sunshine combined with that cold air aloft has helped to create scattered to numerous rain/snow showers in the area. Cloud cover Sunday will come as another cold front, this one a dry one, crosses the region.
An upper level low pressure system is expected to push across Indiana today. High pressure is then expected to push across Indiana tonight. A quick moving trough of low pressure will then sweep across Indiana on Sunday.
Dry air mass and clear skies will allow for good radiational cooling overnight, although a little more consistent wind speeds will make it a little warmer than this morning. A cold front will sag into the area on Sunday afternoon. May reach the Big Country soon enough in the day to keep temperatures a few degrees cooler. South of the front across the remainder of the area, warmer readings with highs in the low to mid 70s.
ABM Chattanooga Airport, TN 31 53 34 56 43 / 10 0 0 0 50 Knoxville McGhee Tyson Airport, TN 31 50 32 53 40 / 20 0 0 0 50 Oak Ridge, TN 31 51 32 53 39 / 20 0 0 0 50 Tri Cities Airport, TN 29 46 31 50 34 / 40 0 0 0 60 TN.
233 PM CST Sat Jan 4 2020 Quite weather today as ridging builds in, but a short wave trough will pass over the region Sunday morning. If this holds true, then freezing drizzle will occur.
up to 40-45kts at the lowest gate. Have another upper low tracking across northern Wyoming.
1149 AM CST Sat Jan 4 2020 Latest water vapor imagery is showing a closed low moving southeast across southeast Iowa early this morning. The upper low will open up and move quickly off to the east this afternoon allowing for clearing west of the Mississippi. Temperatures will warm up into the upper 40s and lower 50s ahead of the attendant cold front that will pass through during the day.
Weak ridging and WAA prevail today as southerly winds bring warmer than average temperatures into the area. The main impacts this weekend will be attached to our next clipper system and associated cold front that will push through the region late tonight and through the day on Sunday. The current forecast will keep the highest wind gusts to higher elevations west of the Red River Valley. Overall impacts will remain toward the low end of the spectrum (although just a bit of snow and drifting does lead to hazardous travel at times). Guidance indicates zonal flow with multiple long wave troughs propagating from west to east across the CONUS.
Winds should subside as well as high pressure moves overhead/slightly past the forecast area. /issued 436 AM CST Sat Jan 4 2020/ Once again high pressure is settling in across the region this morning. This afternoon will see mostly clear skies as temperatures recover into the low to mid 60s along the I-10 corridor and near 60 in central Louisiana and the lakes region of southeast Texas. The weather will remain quiet into Sunday though winds will swing around to the south as high pressure moves over the Florida Panhandle.
The lee trough east of the Canadian and Montana Rockies will drop a cold front across the central Plains overnight.
An upper trough is bringing scattered sleet and snow showers to the area.
Scattered rain/snow showers will transition to all snow through the evening as an upper trough currently over the Ohio Valley transitions across the region. The exception is in the ridges E-SE of PGH where orographic enhancement will maintain snow showers into Sunday morning. In general one to three inches is forecast in the higher terrain with highest amounts across Tucker county WV where two to four and (locally higher amounts) are forecast. Increasing subsidence in the wake of the upper trough will result in snow tapering off Sunday morning. A fast moving trough is then progged to approach and cross the region Sunday night which will increase snow shower chances again. Accumulations should be an inch or less in general outside of the ridges and along/north of the I-80 corridor where 1-2 is forecast at this time.
The cold front has finally pushed east of our area, which will result in a dry day across the Tennessee Valley. One such system as an upper trough will amplify as it moves across the region today into Sunday. Colder air west of this trough will only have a brief time to impact this region, with low temperatures tonight only cooling to around 30. Low temperatures Saturday night will be a bit warmer into the low/mid 30s.
An upper level trough is expected to swing through later this evening. Height falls and an increased pressure gradient accompanied with the upper level trough are expected to lead to strong winds with occasional gusts up to 35 mph later this afternoon and into the evening through the overnight hours. High temperatures will gradually increase a few degrees as diurnal mixing combats the cold air advection from the passage of the cold front earlier this morning. High pressure is expected to build across the region tomorrow leading to a sunny day with high temperatures staying in the upper 50s for much of the region.
1007 AM EST Sat Jan 4 2020 A cold front has passed east of the area.
Skies are clearing from NW to SE but there are some mid level clouds streaming in around the back side of the main low pressure center. May see some isolated areas of freezing or frozen precipitation across the N GA maintains as temps fall into the evening hours. Given strong cold air advection and cold 850mb temps, some light snow showers will be possible in the higher elevations through midnight before the remaining moisture pushes NE of the state.
Surface winds should gradually back to the south or southwest tonight, ahead of our next cold front that will approach Sunday morning. Look for overnight lows to fall into the lower 30s or upper 20s. For tomorrow, the previously mentioned cold front will shift across southern Missouri bringing about another wind shift and some slightly cooler air.
Cooler air will begin filtering in rather quickly behind the frontal passage.
116 PM EST Sat Jan 4 2020 A cold front has passed east of the area.
147 PM EST Sat Jan 4 2020 Strong and gusty winds will occur behind a cold front through much of tonight.
An upper trough is tracking across the region this morning with light snow in the mountains and trailing showers across southeast Oregon.
940 AM CST Sat Jan 4 2020 The cold front has finally pushed east of our area, which will result in a dry day across the Tennessee Valley. One such system as an upper trough will amplify as it moves across the region today into Sunday. Colder air west of this trough will only have a brief time to impact this region, with low temperatures tonight only cooling to around 30. Low temperatures Saturday night will be a bit warmer into the low/mid 30s.
This low will have only limited cold air behind it so Sunday's temperatures may be a few degrees colder but still quite pleasant for early January.
The sun has returned to the region as the upper trough moves across the area. It is bringing a wind shift out of the northwest and will scour out the last of the low clouds and light rain showers through the morning hours. Building high pressure with clear skies and light winds overnight will allow for good radiational cooling, although wet ground conditions may prevent ideal conditions for temperatures to drop too low.
Upper ridging will build over the region today pulling up some warmer air on southwest surface winds ahead of an incoming front. Winds could mix down in the higher elevations west of the Missouri and then again along the Coteau while missing much of the rest of the area. Quieter, but cooler, conditions are expected for Sunday as high pressure builds in at the sfc.
103 PM EST Sat Jan 4 2020 A cold front has passed east of the area.
As continues to be the case, upper trough passage expected across this area as afternoon hours progress. An upper trough is bringing scattered sleet and snow showers to the area.
236 PM MST Sat Jan 4 2020 Tonight, strong post frontal winds still expected to occur in and near northern Front Range Foothills and Cheyenne Ridge late this afternoon and evening. Drying late tonight into Sunday morning with short wave ridge in place. By Sunday afternoon, increasing mid level qg ascent developing with the next trough. Cooler and continued dry across the northeast plains.
622 PM EST Sat Jan 4 2020 Strong and gusty winds will occur behind a cold front through much of tonight.
Light south wind will turn north and become gusty behind a cold front Sunday. /issued 358 PM CST Sat Jan 4 2020/ A weak cold front will enter NW OK by 09Z Sunday and progress southeastward.
At lower elevations, a dry cold front associated with this system will usher breezy north winds into the southern Great Basin and Mojave Desert Sunday afternoon/evening.
202 PM MST Sat Jan 4 2020 Current surface map has trof/warm front moving into the central Dakotas. with cold front moving through central Montana. with cold front moving across western South Dakota later this evening.
Temperatures overnight will hold steady, but likely rise as mild airmass gets advected off the high plains later tonight. That warmer airmass will hopefully hold any blowing/drifting snow at bay as winds increase quite a bit later tnt. Upper level ridge moving across the state today becomes a bit more zonal and we transition to west southwest flow aloft, with a mild trough expected to progress through tonight. An associated cold front looks to go through the Dakotas late this evening into the overnight hours. The main concern overnight will be the high wind potential. All but a couple models are having trouble showing enough mixing to translate to the surface, but with steep low level lapse rates and CAA behind the front, we should have enough mechanical mixing to put us around the advisory range, especially in the higher elevation areas.
/Tonight through Saturday/ Ridge of high pressure is stretched across central Iowa this afternoon. A calm evening is expected as the ridge continues to progress to the east. Temperatures are expected to be near to above freezing as this occurs and this should limit any blowing snow potential.
Winds will increase (gusts 25-30 mph with Sierra ridge gusts to 45 mph) this evening and overnight as another weak weather system approaches our region.
This second wave tries to generate low pressure across eastern WY during the afternoon, which helps to reestablish the southwesterly flow across the state, especially the southern half of the state. Snow chances will remain confined again to the higher elevations, aided by orographic lifting.
602 PM CST Sat Jan 4 2020 Quiet weather today as ridging builds in, but a short wave trough will pass over the region Sunday morning. If this holds true, then freezing drizzle will occur.
An upper level low located over the Gulf of Alaska moves eastward.
809 PM EST Sat Jan 4 2020 Cold front has moved south of the CWA. High pressure will build in from the west. Skies are clearing from NW to SE but there are some mid level clouds streaming in around the back side of the main low pressure center. May see some isolated areas of freezing or frozen precipitation across the N GA maintains as temps fall into the evening hours. Given strong cold air advection and cold 850mb temps, some light snow showers will be possible in the higher elevations through midnight before the remaining moisture pushes NE of the state.
304 PM CST Sat Jan 4 2020 Not a cloud to be seen across eastern Oklahoma and western Arkansas this afternoon as high pressure prevails across the region. Abundant sunshine will be the rule on Sunday even with a cold front moving through the region. Temperatures are slated to rise above normal levels despite the cold frontal passage.
Consensus blended model solutions showing upper level troughing continuing to move across Upper Cumberland Plateau Region late this afternoon and into the early evening hours. Still not expecting any significant accumulations other than maybe the highest elevations of Cumberland Plateau Region where possibly maybe a tenth or two of snowfall accumulation could occur.
Power outages have occurred in the Highway 200 corridor in the vicinity of Plains and the Highway 2 corridor from Essex to West Glacier.
532 PM CST Sat Jan 4 2020 High pressure and clear skies continue across the area. A quick moving mid level trough and associated surface reflection will approach late in the period.
Elsewhere, temperatures have climbed into the low to mid 40s.
The base of the upper trough will continue to move through the region overnight. High pressure is expected to build across the region on Sunday leading to a sunny day with high temperatures staying in the upper 50s for much of the region.
528 PM CST Sat Jan 4 2020 Upper level ridge moving across the state today becomes a bit more zonal and we transition to west southwest flow aloft, with a mild trough expected to progress through tonight. An associated cold front looks to go through the Dakotas late this evening into the overnight hours. The main concern overnight will be the high wind potential. All but a couple models are having trouble showing enough mixing to translate to the surface, but with steep low level lapse rates and CAA behind the front, we should have enough mechanical mixing to put us around the advisory range, especially in the higher elevation areas.
The overcast will break up from west to east overnight and into early Sunday morning as ridging moves in. An upper low is pushing into south central KY, and some earlier sunshine combined with that cold air aloft has helped to create scattered to numerous rain/snow showers in the area. Cloud cover Sunday will come as another cold front, this one a dry one, crosses the region.