Aikyam-Lab/Synoptic-Bench huggingface dataset:
907 PM CST Sat Dec 9 2017 As of 9 PM, temperatures range from the low 40s south of the I-10 corridor to the lower to middle across interior SE Texas and SW Louisiana. With high pressure in place across the northern gulf, another night of clear skies and calm winds will allow temperatures to drop below freezing north of the I-10 corridor although without the cold air advection, temperatures will be a few degrees warmer than we saw this morning.
A large mid/upper level trough is currently situated over the eastern half of the CONUS, while an impressive mid/upper level ridge sits over much of the western CONUS including Nevada and California. High temps this afternoon will be a little warmer than yesterday as we continue a gradual warming trend.
551 PM CST Sat Dec 9 2017 Ample sunshine was competing with 850mb cold air advection and leading to afternoon temps in the low 40s across the west to the upper 30s in the east, closer to the upper level low. Sunday will be warmer as 850mb temps increase over today's readings. Generally looking at highs in the low to mid 50s.
652 PM EST Sat Dec 9 2017 Low pressure and a cold front will push east across the region this evening. Weak high pressure will then build into the area later tonight into Sunday.
1000 PM EST Sat Dec 9 2017 Low pressure will move off the mid Atlantic coast tonight.
Some of the low stratus clouds eroded in the northern portion of the Snake Plain between Mountain Home and Jerome, while to the west the stratus spread into most of the valleys of southeast Oregon below around 4500 feet MSL.
A north-south oriented warm front extended from western Manitoba across the eastern Dakotas this afternoon. This warm front will continue moving east as a west coast upper level ridge continues to expand eastward across the Rockies and western Plains. This warm airmass remains in place through Sunday, with even warmer H850 temperatures advecting into the state. Kept the higher side of forecast temperature guidance with highs in the lower 50s for much of southwest and south central ND, with 40s elsewhere except in the Turtle Mountains and along the James River Valley, where highs should reach into the 30s.
608 PM CST Sat Dec 9 2017 Clouds will increase later tonight ahead of a weak mid level trough. Forecast confidence is medium to high: A weak trough of low pressure will move through late tonight into Sunday morning. There isn't much lift with this system and there will be a fair amount of dry air in the lower levels.
Saturday afternoon satellite imagery showed an upper ridge positioned over the WRN CONUS, and a broad trough centered over the WRN Gulf of Alaska.
Attention then turns to low pressure diving southeast out of Saskatchewan Canada into northern MN Sunday night. Therefore, will have to watch for some patchy freezing drizzle as there will be lift in the lingering stratus layer.
Forecast on track this evening as upper trough swings through the area. Chattanooga Airport, TN 24 43 28 53 / 0 0 0 0 Knoxville McGhee Tyson Airport, TN 22 41 28 50 / 10 0 0 0 Oak Ridge, TN 23 41 28 50 / 10 0 0 0 Tri Cities Airport, TN 23 39 22 48 / 30 0 0 0.
726 PM EST Sat Dec 9 2017 Digging upper trough and cold front push east overnight.
532 PM CST Sat Dec 9 2017 Persistent ridging across the western CONUS will continue through Sunday, with dry northwest flow aloft on the eastern side of the ridge across the central and northern plains. Winds will actually increase a little tonight as a Pacific cold front crosses the area. Where winds decouple in lower spots like river valleys, it will be a bit colder in the lower 20s. Full sunshine Sunday, plus a surge of warmer air aloft, with 850mb temperatures rising to between 8C and 10C, will boost highs into the lower 60s across portions of the area.
With high pressure in place across the northern gulf, another night of clear skies and calm winds will allow temperatures to drop below freezing north of the I-10 corridor although without the cold air advection, temperatures will be a few degrees warmer than we saw this morning.
A 524 dm 500 mb low over northeast IN was within a strong upper level trof over the central Ohio river valley. As upper level low/trof pulls further away from IL by early evening, expect clouds and brisk NW winds of 15-25 mph and gusts 25-35 mph to diminish. Lows Sunday night in the low to mid 20s as winds diminish light and clouds increase from the NNW overnight Sunday night.
Unseasonably Cold Tonight with Wind Chill Advisory Over Most Drier/colder airmass continues to build into the area in the elevated northwest flow behind the cold front that is now well east of the area.
The weather pattern wont change much over the next 4-6 days as we keep upper level troughing over the eastern U.
Have gone with highs there in the upper 30s to lower 40s, while areas north of I-80 will likely be limited to the lower to mid 30s, close to blended model guidance.
920 PM EST Sat Dec 9 2017 Low pressure will move off the mid Atlantic coast tonight.
/28/ At mid afternoon an upper trough axis extended from the Great Lakes to just east of the Lower Mississippi Valley. A dry cold front was approaching the Forecast area from the north.
Snow is rapidly melting today and can only be seen (via visible satellite imagery) across the higher mountain tops.
540 PM CST Sat Dec 9 2017 A 524 dm 500 mb low over northeast IN was within a strong upper level trof over the central Ohio river valley. As upper level low/trof pulls further away from IL by early evening, expect clouds and brisk NW winds of 15-25 mph and gusts 25-35 mph to diminish. Lows Sunday night in the low to mid 20s as winds diminish light and clouds increase from the NNW overnight Sunday night.
Meanwhile, the valleys of Southwest Montana will be strongly influenced by temperature inversions for cold overnight temperatures with areas of freezing fog.
620 PM CDT Mon Apr 17 2017 Weak high pressure is trying to build across the the area this afternoon. Most of the lower clouds and showers have moved southeast of the area with just a few lingering showers over southeast Missouri and central Illinois. with a slight chance of thunderstorms late Tuesday afternoon over northeast Missouri ahead of the next upstream cold front.
An increasingly moist and unstable southwest flow ahead of a broad upper level offshore trough will bring showers into SE Oregon and SW Idaho through Tuesday, along with a slight chance of afternoon thunderstorms.
Cold front located just south of the mid state at this time. The pattern will remained unsettled through the taf period as the aforementioned cold front is expected lift northward as a warm front late tonight.
Chattanooga Airport, TN 60 77 59 76 / 60 60 60 30 Knoxville McGhee Tyson Airport, TN 58 71 57 75 / 60 60 60 40 Oak Ridge, TN 59 72 59 77 / 60 60 60 40 Tri Cities Airport, TN 53 67 51 73 / 40 40 60 50.
1033 PM EDT Mon Apr 17 2017 High pressure will build into the Great Lakes, offering dry weather tonight into Tuesday.
Weak high pressure over Illinois is resulting in fair skies with light winds tending to be from the south. Lows should range from the lower 40s far NE to the upper 40s SW sections and likely mins to be within 3 degrees.
Latest model output showing deeper moisture associated with east Texas trof to expand eastward into the region overnight. Have introduced pops for all but the most eastern portion of the forecast area, with the highest over southeast Texas. Afternoon diurnal convection has been a little more lively today as area lies in weak troffing aloft and a very soupy airmass. Temperatures this afternoon are in the lower/mid 80s. Abundant Gulf moisture, daytime heating, and more defined SW to NE oriented trough aloft across E Texas to the Western Gulf is expected on Tuesday.
00 UTC surface analysis shows our region on the western edge of a ridge of high pressure across the Western Atlantic.
956 PM EDT Mon Apr 17 2017 High pressure will build down over the region from eastern Canada bringing fair but chilly weather tonight through Tuesday night.
758 PM EDT Mon Apr 17 2017 High pressure will build into the Great Lakes offering dry weather tonight into Tuesday.
Main concern for short term will be WINTRY mix mix tonight A strong low pressure system will move across the dakotas this evening and northern MN Tuesday. Surface temps will be below freezing but warmer temps in the lower levels due to the southerly flow at those levels. forecast soundings do suggest a possibility of sleet and freezing rain along with the rain and snow with the best shot in eastern Koochiching, northern and central St. The area south of Highway 2 will remain above freezing overnight. Warmer air into the advisory area changing over to all rain.
As for the rest of tonight expect any linger showers to end with loss of daytime heating with dry and mild conditions expected overnight with low temperatures in the lower to mid 60s.
719 PM CDT Mon Apr 17 2017 Showers and thunderstorms developed along the weak cold front that moved south across the area overnight and early today. The boundary is settled over north MS but much of the CWA has been worked over and instability is waning with the the lowering sun angle. Scattered showers and thunderstorms will continue for another few hours, especially south and east of Tupelo, but additional showers will be possible overnight across the remainder of the area given the proximity of the upper-level trough.
1150 PM CDT Mon Apr 17 2017 Weak high pressure is trying to build across the the area this afternoon. Most of the lower clouds and showers have moved southeast of the area with just a few lingering showers over southeast Missouri and central Illinois. with a slight chance of thunderstorms late Tuesday afternoon over northeast Missouri ahead of the next upstream cold front.
707 PM EDT Mon Apr 17 2017 High pressure ridging into the forecast area from the Atlantic will weaken as a cold front moves into the area tonight.
Forrester Previous short term: An energetic wave/warm front pushes northeast into the local region this afternoon, then exits after midnight. With the ridge in place, Tuesday should become a mild day, with highs near normal. This will lead to successive periods of low pressure troughs and high pressure ridges through latter part of this week and throughout the weekend.
654 PM CDT Mon Apr 17 2017 An upper level trough will move across the Northern and Central Plains tonight. A weak cold front will also sweep thorugh the area overnight. By Tuesday evening, this upper trough will approach the area, providing another chance for showers and thunderstorms. A warm front across northern Kansas will remain nearly stationary.
Upper level trough over the region will keep the potential for showers and thunderstorms in most of the area through the period. Another round of showers and storms is then anticipated on Tuesday as the trough axis sets up and deepens more over the Texas coast. Moisture will not be quite as high, and do not anticipate very high rainfall rates on Tuesday, but the overall setup will be enough to generate scattered showers and thunderstorms with the highest chances across the Coastal Plains into the Victoria Crossroads once again, waning in coverage during the early evening. There will not be much variance with regard to temperatures between today and tomorrow, with highs generally in the low to mid 80s and lows in the mid 60s to lower 70s along the coast.
Additional showers will be possible across the Mid-South tonight, with the highest rain chances along and north of I-40. /issued 719 PM CDT Mon Apr 17 2017/ Showers and thunderstorms developed along the weak cold front that moved south across the area overnight and early today. The boundary is settled over north MS but much of the CWA has been worked over and instability is waning with the the lowering sun angle. Scattered showers and thunderstorms will continue for another few hours, especially south and east of Tupelo, but additional showers will be possible overnight across the remainder of the area given the proximity of the upper-level trough.
744 PM EDT Mon Apr 17 2017 High pressure will build down over the region from eastern Canada bringing fair but chilly weather tonight through Tuesday night.
Afternoon diurnal convection has been a little more lively today as area lies in weak troffing aloft and a very soupy airmass. Temperatures this afternoon are in the lower/mid 80s. Abundant Gulf moisture, daytime heating, and more defined SW to NE oriented trough aloft across E Texas to the Western Gulf is expected on Tuesday.
With recent rainfall and warmer temperatures, it will "feel" kinda humid tomorrow.
928 PM EDT Mon Apr 17 2017 A cold front will move well offshore tonight.
Back door cold front has progressed into south central WI early this evening. Winds may be a bit stronger on Tuesday ahead of approaching weak cold front. Potent 850 LLJ traverses largely to our northwest and north in conjunction with the low though core of strongest winds and associated speed/moisture convergence is proggd to stay to nor north.
839 PM EDT Mon Apr 17 2017 Variable clouds with a few scattered light showers or sprinkles will be possible this evening, otherwise skies should gradually become clear to partly cloudy by Tuesday morning as high pressure builds into the region. The trough passage may spark a few light showers or sprinkles across mainly northern counties this evening, otherwise mainly dry weather is expected after midnight as skies gradually trend clear to partly cloudy in most areas by Tuesday morning. High pressure at the surface and aloft will build across the region for Tuesday with fair weather and a light wind regime.
1045 PM EDT Mon Apr 17 2017 Canadian high pressure builds into the region through Tuesday night.
A broad upper low well offshore will guide a series of disturbances into Oregon and Washington, keeping our weather unsettled through Tuesday.
1024 PM EDT Mon Apr 17 2017 High pressure ridging into the forecast area from the Atlantic will weaken as a cold front moves into the area tonight.
630 PM CDT Mon Apr 17 2017 Updated aviation section for 00z taf issuance A weak frontal system will continue to sink south into Dixie tonight, allowing a weak ridge axis to slip farther southeast toward the Ohio Valley region.
951 PM EDT Mon Apr 17 2017 High pressure ridging into the forecast area from the Atlantic will weaken as a cold front moves into the area tonight.
801 PM EDT Mon Apr 17 2017 Variable clouds with a few scattered light showers or sprinkles will be possible this evening, otherwise skies should gradually become clear to partly cloudy by Tuesday morning as high pressure builds into the region. The trough passage may spark a few light showers or sprinkles across mainly northern counties this evening, otherwise mainly dry weather is expected after midnight as skies gradually trend clear to partly cloudy in most areas by Tuesday morning. High pressure at the surface and aloft will build across the region for Tuesday with fair weather and a light wind regime.
A weak cold front will stall across central Utah tonight.
The warm front will quickly move inland through the coastal plains during the morning but may have a difficult time retreating through all of the Brush Country. NAM continues to show the warm front not reaching I-35 with highs only in the lower 60s. This short wave trough will move northeast through the Brush Country tonight. Expect shower activity will increase during the evening hours as this short wave trough approaches and low level warm air advection strengthens. Isentropic lift will keep a threat of showers during the morning hours over the Brush Country but rain chances will diminish by the afternoon as the warm front moves inland. A weaker short wave trough should move northeast out of Mexico into the Brush Country Friday night to provide another chance for showers.
On Friday, a new upper level trof will move into UT. Toward evening, a few snow showers could develop over the higher peaks of the eastern CO mtns. With mostly breezy easterly sfc wind expected, will lean a little more toward the cooler guidance values, but won't go quite that cool.
928 PM CST Thu Feb 22 2018 Seasonably strong deep-layer southwesterly flow continues across the TN Valley this evening, as the region remains along the western rim of a 500-mb subtropical ridge centered off the southeastern Atlantic coast. To our northwest, a mid-level vort max is forecast to eject northeastward from the high plains of CO into the upper MS Valley in the flow downstream from an amplified longwave trough over the western CONUS. It appears as if an axis of widespread rain and elevated convection tied to the lows trailing confluence axis will remain just to the north/west of the region through at least sunrise tomorrow, and we will maintain only a silent 10 POP in the forecast for all areas overnight.
952 PM CST Thu Feb 22 2018 Surface warm front showing signs of lifting out of northeast MS at midevening, with northerly winds on the cool side of the boundary over west TN weakening and veering to the east. Locally dense fog was observed immediately north of the warm front at midevening, but should visibility should gradually improve as the front lifts north and showers move into the area.
A cold front and upper level low will bring numerous showers and low snow levels to northwest Arizona later tonight and across portions of northern and central Arizona during the day Friday.
Chattanooga Airport, TN 62 78 59 75 / 10 10 30 40 Knoxville McGhee Tyson Airport, TN 61 77 57 73 / 20 10 30 40 Oak Ridge, TN 62 76 57 73 / 20 10 30 40 Tri Cities Airport, TN 56 76 54 71 / 20 10 30 30.
903 PM CST Thu Feb 22 2018 At 8 PM, a warm front extended from Cleveland to Houston to Bay City. Dew points are in the lower 70s but water temps have risen into the mid 60s and winds should be stronger tonight which cold mitigate the fog threat.
1025 PM EST Thu Feb 22 2018 There are a few light to moderate showers arranged in a relatively thin line stretching from around the Lower Keys eastward into the Straits of Florida well offshore from the Middle and Upper Keys.
/Issued 412 PM CST Thu Feb 22 2018/ Southwest upper level flow continued across the Southern Plains this afternoon as an upper level longwave trof axis remained out west with a ridge of high pressure over the Gulf Coast States/Southeast U. surface temperatures had warmed above freezing CWA-wide which has allowed for the winter weather advisory to expire. Temps ranged from the mid 30s in Osage county to the low 50s in parts of Northwest Arkansas. Temperatures overnight look to not change all that much and for most locations remain above freezing. Temperatures continue to stay above freezing Friday with forecast highs in the mid 40s to mid 50s.
412 PM CST Thu Feb 22 2018 Southwest upper level flow continued across the Southern Plains this afternoon as an upper level longwave trof axis remained out west with a ridge of high pressure over the Gulf Coast States/Southeast U. surface temperatures had warmed above freezing CWA-wide which has allowed for the winter weather advisory to expire. Temps ranged from the mid 30s in Osage county to the low 50s in parts of Northwest Arkansas. Temperatures overnight look to not change all that much and for most locations remain above freezing. Temperatures continue to stay above freezing Friday with forecast highs in the mid 40s to mid 50s.
Persistent frontal zone that has been in the region for the past several days will continue to influence the area, lifting back northward again as another wave of low pressure moves along it late tonight into Friday, producing another round of rainfall.
The highest QPF should occur across southeast MO into southwest IL tonight in a region of strong low level temperature advection and moisture convergence on the nose of a strong southwesterly low level jet. Rising cloud heights Friday afternoon, although not clearing should lead to warmer temperatures with highs about 5 to 10 degrees above normal for late February. GKS Forecast concerns Friday night into the weekend include the potential for freezing rain, locally heavy rainfall, and possible severe thunderstorms. Rain will begin to move back northward on Friday evening as both the GFS/NAM show upper trough entering the high Plains.
Freezing temperatures are forecast across much of the SJ Valley Friday night.
If fog does develop, it is not out of the question that a few spots, mainly from Bartlesville west, could see freezing fog.
555 PM CST Thu Feb 22 2018 For the ArkLaTex, a warm front stretches from KLFK to KRSN/KMLU and continues lifting Northward. Cigs/vsby issues will linger well into daylight on Friday with models showing more TSTM activity along the warm frontal boundary currently affecting KGGG and soon for KTXK/KTYR. Warm front will lift past terminals with MVFR/VFR expected late period and L/V winds. Outlook is for more TSTMS for Sat and the next weak cold front drying us for 2/3 days. Warm front now along a line from just se of Lufkin to just s of Monroe, pushing nwd. Warm front to continue its trek nwd tonight, lining up parallel to the disturbed swly flow aloft.
Ceilings and visibilities should decrease to LIFR at the I-35 sites around 4Z as the front to our south begins to lift north as a warm front. Upper air analysis this morning showed a deep trough over the western half of the country with southwesterly flow over Texas.
428 PM MST Thu Feb 22 2018 Deep upper trough is persisting across the western CONUS, with southwesterly flow over the central Rockies through the northern Plains and upper Midwest. It still looks like the higher snowfall amounts will be limited to Tripp County.
/Issued 329 PM CST Thu Feb 22 2018/ An upper trough will track south and east from the Pacific Northwest tonight and across the Rockies Friday.
Across northeast Florida, onshore flow will moisten the lower levels and also allow lower clouds and fog to develop, and most short term guidance continues to point to that possibility by sunrise. Inland areas will have the highest chance for dense fog developing, but for now it looks like that could remain patchy. SCEC headlines for the higher seas close to 6 feet offshore will continue.
Nighttime lows should remain in the mid to upper 60s, warmer near the coast.
Very little change as rather strong high pressure ridge centered west of Bermuda is producing a moderate low level easterly breeze. A weak inverted trough moving into the coast late tonight might pick up winds to around 15 knots behind it.
A bit more moisture entering the area along with additional lift as the base of the upper-level trough swings through Nevada.
135 PM EDT Fri Nov 3 2017 Dry conditions can be expected until a warm front returns shower chances later Saturday.
Ahead of this feature at the surface is a cold front which as of 14z was located near a FSM/PRX/TRL line. All this to say we cannot rule out the possibility of some isolated strong to possibly severe thunderstorms late this afternoon into this evening along and ahead of the above mentioned cold front. For this morning's update, have kept slight chance/chance pops going for the remainder of the day with the higher probabilities across our northern and eastern most zones as this is where lift/moisture is slightly higher. Did raise temperatures a degree or two across the warm sector of Southern Arkansas into most of North Louisiana to account for the breaks in overcast and any kind of compressional warming we may see ahead of the slow moving cold front.
Then, a cold front approaching from the northwest will generate more widespread rainfall from Friday evening into Saturday, with most rain expected Friday night.