Aikyam-Lab/Synoptic-Bench huggingface dataset:
1222 PM EST Thu Dec 31 2020 The forecast is still largely on track with the main update being an upgrade of the High Wind Watch to a High Wind Warning for all areas except for the mountains of Polk County. BW Chattanooga Airport, TN 52 68 47 61 42 / 90 90 20 10 30 Knoxville McGhee Tyson Airport, TN 49 66 49 60 42 / 70 90 30 10 40 Oak Ridge, TN 49 66 48 58 41 / 80 90 20 10 40 Tri Cities Airport, TN 48 59 45 60 41 / 50 70 40 10 60 TN.
400 AM CST Fri Nov 15 2019 The flow aloft will be in transition over the next few days as the upper trof across the lower MS Valley departs slowly eastward and a northern stream upper trof swings from the Hudson Bay vicinity eastward. This flow regime will maintain high pressure across the region through the period to varying degrees.
241 AM MST Fri Nov 15 2019 Today-Tonight: Height rises assoc/w a de-amplifying upper level ridge progressing eastward from the Rockies into the Central/ Southern Plains, the onset of low-level southerly return flow on the eastern periphery of a broad lee cyclone, and mostly clear skies (aside from transient cirrus) will yield a noticeable warming trend today, with highs reaching the mid-upper 60s to lower 70s, warmest in eastern Colorado. Thermal profiles suggest all liquid precipitation, with surface temperatures and wetbulbs above freezing.
Dry and relatively cool conditions are expected today in advance of a weak cold front. With no cloud ice present, some patchy freezing drizzle is not out of the question with weak lift ahead of the front during the evening. High pressure will build back in on Saturday and expect limited cloud coverage by the afternoon as winds aloft veer east.
1046 AM MST Fri Nov 15 2019 A quiet, transitional day is in store for eastern Utah and western Colorado today as the ridge axis continues to shift east through the morning. Even with the increased clouds daytime highs will once again run well above seasonal normals - close to 10 degrees warmer than normal in some areas - as 700mb temperatures range from 4 to 8 degrees C. The increased cloud cover will have the opposite impact on overnight lows tonight by minimizing the effects of radiational cooling, allowing for values to trend a few degrees warmer. Saturday will see a midlevel trough and associated cold front drop south across the Northern Rockies.
Light north winds will become light and variable this evening as the high pressure ridge settles over the area. Temperatures will warm into the lower 60s today which is still about 15 degrees below normal.
1049 AM EST Fri Nov 15 2019 Cold front shifting southeast of the I-4 corridor will clear the area by this evening, with winds becoming northwest as it moves through. Temperatures already warming up into the low 80s along coastal locations of the Treasure Coast and could reach a few degrees warmer before showers increase with this boundary. However, cloudy conditions and cooler air behind the front will likely keep temps in the 60s to low 70s near to north of Orlando.
Sisseton sits at the freezing mark while Aberdeen and Watertown have jumped to around 50. As the front encounters the Coteau in the evening, falling temps after sunset could mean some light freezing drizzle or freezing rain on upslope flow. Temperatures during the day will be tempered slightly by the cloud cover but are still expected to climb into the 40s and 50s again since the upper trough doesn't move in until after peak heating.
1045 AM MST Fri Nov 15 2019 Water vapor shows upper ridge over the western CONUS with upper trof just offshore the Pacific NW. Weak surface trof is pushing into the western Dakotas. Next upper wave currently just offshore the Pac NW coast will knock down the ridge late tonight and Saturday as it crosses the Northern Rockies into the Northern Plains. Some light rain, possibly mixed with light snow from northeast WY into the Black Hills, will be possible very late tonight and Saturday behind the cold front.
A very pleasant day is in store across eastern Oklahoma and northwestern Arkansas thanks to high pressure dominating the weather pattern. Our warming trend also starts today and will continue through tomorrow as mid level heights rise over the region in the wake of an exiting trough. Mostly clear skies and a nearby high pressure are allowing for rapid warming at the surface resulting in a developing low level mixed layer to about 925mb. These light winds will keep the air mixed and will allow for warmer low temps tomorrow morning than observed this morning.
157 PM MST Fri Nov 15 2019 Upper trough will move out of the northern Rockies tonight and into the adjacent plains on Saturday. Accompanying surface cold front will move through the forecast area Saturday afternoon with winds shifting to the north and becoming breezy for a few hours.
1259 PM CST Fri Nov 15 2019 High pressure over MO is combining with a storm system off the S Carolina coast to provide a northerly wind flow of 10 mph or so. High pressure to shift across the Great Lakes region by tomorrow but southwestward ridging will extend our way.
Expect rain to continue to move off to the east as the low continues to pull away off-shore. ABM Chattanooga Airport, TN 33 57 33 59 37 / 0 0 0 0 0 Knoxville McGhee Tyson Airport, TN 31 54 31 57 36 / 0 0 0 0 0 Oak Ridge, TN 29 54 30 57 35 / 0 0 0 0 0 Tri Cities Airport, TN 28 54 28 56 34 / 0 0 0 0 0.
216 PM CST Fri Nov 15 2019 High pressure was continuing to build into the region this afternoon. the ridge axis was moving across the area with light northwest winds over central Missouri. As high pressure continues to make its way eastward. an upper level trough.
A few hours in the morning may see a bit of freezing rain for a few locations. This wave will drop a cold front into the region tonight, which will likely limit the development of fog due to improved mixing. Precipitation chances seem limited but if any occurs will be a mix of rain, freezing rain or snow from late tonight into Saturday. Remainder of the period will feature a somewhat flat ridge over the west with westerly flow off the Pacific. Ebert Synopsis: Mid- and high-level clouds are increasing more from the west today and have lifted the area freezing fog from earlier this morning.
1214 PM EST Fri Nov 15 2019 Low pressure will move slowly northeastward near the coast through Saturday bringing rain to the area.
231 PM EST Fri Nov 15 2019 A moisture-starved cold front will drop southeast across the region late today and tonight. Another area of high pressure will move north of Lake Ontario Saturday. The clock-wise flow around this high will feed cold air into Pennsylvania on a brisk northeast wind. Weak low level troughing around the Gr Lakes is helping support a small sliver of low clouds. A weak cold front will slide SE through the CWA with little fanfare other than some light flurries later today. The weak cold front will push south of the state tonight, followed be yet another cold high pressure area. High pressure will build north of the region Saturday, making for a bright but chilly day in most areas with a brisk NE breeze.
Latest satellite imagery shows most cloud cover has eroded this afternoon, with clouds remaining only over far northern zones north of I-80 where lower-level moisture is increasing in advance of the cold front. The weak cold front will sag southwards across the area later this evening/tonight. Drier air will filter back into the region on Saturday with building high pressure. With cooler/drier air and light wind, Saturday night will be the coolest of the period.
1039 AM EST Fri Nov 15 2019 Low pressure will move slowly northeastward near the coast through Saturday bringing rain to the area.
Cooler air aloft allows much better mixing in all areas tonight and early Saturday as the trough moves by, along with some increase in winds.
Upper level ridging is currently in place across the area which will lead to gradual warming and quiet conditions for the first half of the weekend.
Highs today will be several degrees warmer than yesterday, with lots of sunshine. Lows to will slightly warmer than this morning's lows, mainly in the lower to mid 70s.
An upper-low and associated troughing has centered over south-central Alabama this morning and will progress into Georgia through the evening. PoPs were increased across the far southeastern portion of the CWA where a few light showers may linger through the early afternoon, but this activity is expected to decrease heading into the late afternoon to early evening as the upper low shifts eastward. Nonetheless, plentiful sunshine across the west will allow highs to warm into the low 50s while areas generally east of I-65 will remain cloudy and cooler with highs in the upper 40s. Northerly flow will help to reinforce the cool, dry, post-frontal air mass on Saturday as highs will struggle to climb much above the low to mid 50s.
859 AM PST Fri Nov 15 2019 Cool and partly cloudy today and tonight under low pressure moving through California. Warmer and clearer weather is expected this weekend with higher pressure and offshore flow.
High pressure will provide dry weather and below normal temperatures through Saturday night.
234 PM EST Fri Nov 15 2019 Low pressure will move slowly northeastward near the coast through Saturday bringing rain to the area.
1130 AM CST Fri Nov 15 2019 High pressure and clear skies will continue through the period. Meanwhile, weak upper ridging wl be noted ovr the FA as a new upper storm system takes shape acrs the Rockies.
A good 25 to near 30 degree warmup expected for Saturday in dry air along with temperatures once again cooling to near the frzg mark Friday Night, perhaps just a couple degrees warmer than tonight due to the presence of some cirrus clouds possible.
A modest southerly flow regime will assert itself after 14z Saturday, as a lee trough evolves from eastern Colorado southward into eastern New Mexico.
223 PM EST Fri Nov 15 2019 Upper low has cut off and is currently over south central AL. This low will move across the outlook area overnight and into Saturday with NW flow aloft Saturday night. Patchy light rain continues early this afternoon ahead of the approaching upper level low pressure center. As the upper low moves across, lapse rates are expected to steepen. The highest precip chances for the afternoon/evening should be metro ATL and southward and should taper off from the northwest to southeast overnight. QPF values have increased across southern portions of the CWA, as the upper low moves across. High pressure will build in for Saturday with dry conditions expected.
The ridge axis will begin to shift to the east tomorrow and light south winds are expected to return to the area.
1138 AM CST Fri Nov 15 2019 The flow aloft will be in transition over the next few days as the upper trof across the lower MS Valley departs slowly eastward and a northern stream upper trof swings from the Hudson Bay vicinity eastward. This flow regime will maintain high pressure across the region through the period to varying degrees.
253 PM CST Fri Nov 15 2019 High pressure will remain over the Mid-South through much of the weekend.
Expecting some breezy winds on Saturday ahead of an approaching cold front.
858 AM MST Fri Nov 15 2019 A dry cold front will push through the region Saturday bringing a cooling trend for the weekend.
Latest water vapor imagery reveals a broad but relatively flat upper ridge extending from the Intermountain West into the Great Plains. the lee trough continues to deepen over eastern CO and NM with resultant warm but dry south to southwest winds prevailing. As the region heads into tonight, very little will change with this pattern other than a flattening of the upper ridge as an anticyclonic wave break brings a closed low over southern CA.
Skies have cleared following yesterday's trough passage. Temperatures will be warmer than yesterday and into the 50s. As the trough interacts with the Gulf Stream baroclinic zone, cyclogenesis off the South Atlantic Coast will tighten the pressure gradient resulting in increased northerly surface winds in our region later today. The low level cold advection pattern will keep high temperatures well below normal for this time of the year with occasional gusty winds making for a rather uncomfortable mid November day. Expect clear skies and decoupling of the BL tonight to allow low temperatures to fall well below freezing.
The surface pressure gradient will tighten somewhat over the next 24 hours as high pressure shifts east.
Temperatures will warm into the lower 60s today which is still about 15 degrees below normal.
613 PM EST Fri Nov 15 2019 Low pressure will move slowly northeastward near the coast through Saturday bringing rain to the area.
Upper low is currently centered over southern Alabama moving east. A deep upper low centered over south Alabama continues to slide off to the east, allowing for a ridge of high pressure build in from the west both at the surface and aloft.
With elevated winds into the overnight hours, likely will see relatively mild temperatures for lows with most locations not falling past the lower to mid 30s. Further complicating things, a surface cold front will work into our western coverage area thru the afternoon hours. This previously mentioned cold front continues to work thru during the evening hours and along with some diffuse forcing, should result in some light precipitation. Overnight lows Saturday settle down to near or a couple degrees above freezing.
The trough and front will push the ridge south as it drops down the Front Range Saturday.
Breezy south winds helped temperatures soar into the low to mid 60s across south central Nebraska and north central Kansas. Lows tonight will be in the low 30s.
550 PM CST Fri Nov 15 2019 Tonight-Saturday: Winds will likely remain up a bit overnight, which will lead to slightly warmer minimums. However recent trends and dry airmass still suggest a lean towards the warmer guidance.
Weak mid level ridging will help keep the weather fair and calm through Saturday.
With the higher southerly winds and low-level warm air advection occurring over western OK and western north TX through about 925mb, the minimum temperatures have been increased slightly for those areas. Expecting some breezy winds on Saturday ahead of an approaching cold front.
638 PM EST Fri Nov 15 2019 Skies will stay cloudy this evening, with a cold front passing through, then skies will quickly clear out.
900 PM EST Fri Nov 15 2019 By press time, the cold front had pushed into the FL Straits south of West Palm Beach and was approaching the Nrn Bahamas. In its wake, precip had pushed offshore as NW sfc winds were pushing cooler and drier air into central FL. Mcldy skies overnight due to the low stratus advecting southward. Deteriorating conditions overnight as winds increase out of the NW behind a cold front pushing into the FL Straits/Nrn Bahamas.
457 PM MST Fri Nov 15 2019 Upper trough will move out of the northern Rockies tonight and into the adjacent plains on Saturday. Accompanying surface cold front will move through the forecast area Saturday afternoon with winds shifting to the north and becoming breezy for a few hours.
225 PM MST Fri Nov 15 2019 An area of precipitation ahead of and along a cold front will move through north-central Idaho and western Montana this evening. Cloud cover and fog will likely keep temperatures from cooling off very quickly tonight; although, lows will be near to below freezing, so icy conditions may develop for Saturday morning.
840 PM CST Fri Nov 15 2019 With sfc ridging directly ovhd, winds are calm across the entire Four State Region and with clear skies overnight, will see ample radiational cooling conditions. Only made minor overnight low temperature changes, mostly across our northern and eastern zones which typically see cooler min temps given these kinds of conditions. Removed much of the freezing fog for much of the region but did leave patchy fog across our southern third with some indications that we could see lower vsbys across the Lower Toledo Bend and Sam Rayburn County of Deep East Texas into West Central Louisiana.
High pressure over MO is combining with a storm system off the S Carolina coast to provide a northerly wind flow of 10 mph or so. High pressure to shift across the Great Lakes region by tomorrow but southwestward ridging will extend our way.
A couple inches of snow are possible in the mountains with temperatures too warm for snow accumulations across the lower elevations. Slightly cooler, but breezy conditions can be expected on Saturday with northwest winds of 15 to 30 mph.
353 PM CST Fri Nov 15 2019 Benign weather progged to prevail through the weekend in the wake of a departing upper low, with NW and then W flow aloft and high pressure at the SFC yielding clear, cold nights and sunny, mild afternoons. Light freezing conditions are expected across East Central LA both tonight and SAT night, with the rest of the area in the mid/upper 30s. Afternoon high temperatures will climb to around 60 tomorrow, and into the lower/mid 60s on SUN. Warmer temperatures are expected SUN night with a modest rise in SFC moisture ahead of a digging upper trof and associated weak SFC front, but this feature will traverse the region with little fanfare other than a slight increase in cloud cover.
A weak cold front will sag southwards across the area later through the night, with increasing cloud coverage after FROPA due to moisture stuck beneath the post-frontal inversion. Drier air will filter back into the region on Saturday as high pressure builds to the north. With cooler/drier air and light wind, Saturday night will be the coolest of the period.
607 PM EST Fri Nov 15 2019 A moisture-starved cold front will drop southeast across the region through late tonight. Another area of high pressure will move north of Lake Ontario Saturday. The clock-wise flow around this high will feed cold air into Pennsylvania on a brisk northeast wind. A weak cold front dropping through the Fingerlakes region early this evening with an extensive low cloud deck extending over the NW and NC Mountains. High pressure will build north of the region Saturday, making for a bright but chilly day in most areas with a brisk NE breeze.
Pattern change still on track around mid week with some breezy winds, cooler temperatures and maybe some rain/snow in southern Sierra Nevada and northern San Joaquin valley. The weather system exiting northern California this evening will allow more clearing and warming as the upper ridge builds back into northern California.
Surface analysis this evening places a 1028 mb ridge of high pressure over the Lower Mississippi Valley and Southern Plains. /issued 253 PM CST Fri Nov 15 2019/ High pressure will remain over the Mid-South through much of the weekend.
/issued 353 PM CST Fri Nov 15 2019/ Benign weather progged to prevail through the weekend in the wake of a departing upper low, with NW and then W flow aloft and high pressure at the SFC yielding clear, cold nights and sunny, mild afternoons. Light freezing conditions are expected across East Central LA both tonight and SAT night, with the rest of the area in the mid/upper 30s. Afternoon high temperatures will climb to around 60 tomorrow, and into the lower/mid 60s on SUN. Warmer temperatures are expected SUN night with a modest rise in SFC moisture ahead of a digging upper trof and associated weak SFC front, but this feature will traverse the region with little fanfare other than a slight increase in cloud cover.
along with temperatures once again cooling to near the frzg mark Saturday Night, perhaps just a couple degrees warmer than tonight due to the presence of some cirrus clouds possible.
355 PM MST Fri Nov 15 2019 A dry cold front will push through the region tonight and tomorrow bringing a cooling trend for the weekend.
High pressure was continuing to build into the region this afternoon. the ridge axis was moving across the area with light northwest winds over central Missouri. As high pressure continues to make its way eastward. an upper level trough.
/issued 253 PM CST Fri Nov 15 2019/ High pressure will remain over the Mid-South through much of the weekend.
While the low cloud forecast are uncertain, the models are in good agreement that mid and high clouds will move into the area. The Saturday high temperatures will be highly dependent on whether the low clouds develop or not.
/Issued 223 PM EST Fri Nov 15 2019/ Upper low has cut off and is currently over south central AL. This low will move across the outlook area overnight and into Saturday with NW flow aloft Saturday night. Patchy light rain continues early this afternoon ahead of the approaching upper level low pressure center. As the upper low moves across, lapse rates are expected to steepen. The highest precip chances for the afternoon/evening should be metro ATL and southward and should taper off from the northwest to southeast overnight. QPF values have increased across southern portions of the CWA, as the upper low moves across. High pressure will build in for Saturday with dry conditions expected.
833 PM EST Fri Nov 15 2019 Skies will stay cloudy this evening, with a cold front passing through, then skies will quickly clear out.
850 PM EST Fri Nov 15 2019 A moisture-starved cold front will drop southeast across the region through late tonight. Another area of high pressure will move north of Lake Ontario Saturday. The clock-wise flow around this high will feed cold air into Pennsylvania on a brisk northeast wind. A weak cold front progressing southward into the Central Mountains at this hour. High pressure will build north of the region Saturday, making for a bright but chilly day in most areas with a brisk NE breeze.
Over the next day, we'll continue to see dry conditions and warmer temperatures. Overnight lows tonight will remain milder in the low to mid 30s. An upper level trough will track across the central US on Saturday and into Saturday evening. This trough will bring some cooler temperatures to the region on Saturday night. This trough will also bring an increased slight chance for precipitation across portions of northern Nebraska.
The models are in good agreement through the short term, with generally flatter flow and eventually modest short wave ridging moving in across the Ohio and Tennessee valleys aloft. At the surface, high pressure will remain in control, with the low level flow remaining out of the northeast. Temperatures will range from the low to mid 20s in the valleys, to near 30 on the ridges. Readings should be a touch cooler on Saturday compared to today; however, have stayed above MOS guidance, as it has been too cool recently. Another cooler night is expected Saturday night, with lows back into the lower to mid 20s in the valleys, with ridges in the upper 20s.
Cooler air is settling in and winds have shifted to the NNW across the area. With high pressure settling in and drier air advecting across the peninsula, skies will begin to clear by late afternoon and the remainder of the weekend should be nice.
An upper level ridge will move across the southern Plains today with the warming trend continuing. Hot on the heels of the ridge is a quickly-moving upper level short wave trough that will drive a cold front southward through the forecast late tonight and early Sunday.
High pressure was continuing to build into the region this afternoon. the ridge axis was moving across the area with light northwest winds over central Missouri. As high pressure continues to make its way eastward. an upper level trough. will move into the Northern Plains states and drag a surface cold front through the area during the day on Sunday.
Drier air will filter back into the region on Saturday as high pressure builds to the north. With cooler/drier air and light wind, Saturday night will be the coolest of the period.
While the low cloud forecast are uncertain, the models are in good agreement that mid and high clouds will move into the area. The Saturday high temperatures will be highly dependent on whether the low clouds develop or not. From Saturday night into Sunday, a low pressure system will move east through the region. There could be even a brief period of freezing drizzle.