Aikyam-Lab/Synoptic-Bench huggingface dataset:
945 PM CST Thu Nov 24 2016 Latest sfc analysis shows the cold front continues moving south thru the Permian Basin, but not yet having much effect on temps. Winds will continue to shift to the north this evening as a cold front moves into the area. Upper ridging builds in this weekend in advance of the next upper trough moving into the West.
Axis of high pressure ridge will settle into north Florida. Dewpoints have been running in the low/mid 60s and our current forecast low temperatures are in that range.
911 PM CST Thu Nov 24 2016 Updated aviation portion for 06Z TAF issuance and new information added to update section Will adjust forecast for the rest of the night to include the possibility of some drizzle/freezing drizzle. But even then, would not be surprised to see some patches of drizzle/freezing drizzle across the area. This should help to keep clouds around through Friday as a mid level trough over the Plains approaches and then passes through Wisconsin. Have included snow and/or rain chances associated with the approaching trough. Friday Night Through Thursday The weekend should be fairly quiet as a ridge of high pressure traverses the western Great Lakes.
A weak cold front will approach the northwestern corner of our CWA by the early morning hours, but very dry air will remain in place at mid-levels and will likely prevent any precipitation throughout this period. Lows are expected to drop into the low-mid 50s inland, with upper 50s along the Gulf Coast.
549 PM CST Thu Nov 24 2016 A mid and upper level trough over the Plains continues its eastward progression. Current position of the cold front stretches from eastern Nebraska to Salina to Hutchinson and Medicine Lodge; this front will keep moving southeast through the evening.
Low pressure advancing towards the Pacific Northwest is still expected to increase shower coverage through Friday afternoon, especially for areas of central Idaho, and east-central Oregon.
Low ceilings in the mvfr/ifr range will continue through the overnight and finally go vfr around 18z on Friday as surface front crawls off the plateau and into eastern Tennessee followed by weak high pressure.
601 PM EST Thu Nov 24 2016 An upper level ridge will build over the region tonight. A cold front will cross the commonwealth late Friday and Friday night, bringing colder air on a gusty northwest wind.
00Z JAX sounding shows light winds and low level moisture in the lower layers up to around 850 mb.
603 PM EST Thu Nov 24 2016 A weak area of low pressure will track from the western Great Lakes into Southern Ontario tonight.
The passage of a weak cold front Friday morning should result in a gradual diminishing trend in cigs from N to S by afternoon.
930 PM EST Thu Nov 24 2016 Mild air will overspread the area through Friday, followed by a cold front passage Friday night. High pressure will build over the region through the weekend.
Dry conditions continue to be expected from tonight thru Sun as sfc riding influences from the Rockies build across our region and upper level ridging dynamics build across our region. Low ceilings in the mvfr/ifr range will continue through the overnight and finally go vfr around 18z on Friday as surface front crawls off the plateau and into eastern Tennessee followed by weak high pressure.
IFR ceilings are expected to develop late tonight at the northwest Arkansas TAF sites behind a cold front that will move through the region Tonight. /Issued 245 PM CST Thu Nov 24 2016/ Cold front entering northwest Oklahoma this afternoon.
/00Z_TAFS/ VFR conditions with SE winds below 10 knots will continue for the next several hours before low clouds gradually return overnight ahead of a weak cold front.
803 PM EST Thu Nov 24 2016 An upper level ridge will build over the region tonight. A cold front will cross the commonwealth late Friday and Friday night, bringing colder air on a gusty northwest wind.
The weak low cold front that moved across Arizona today will continue the northeast breezes tonight.
The high pressure to our north that is responsible for the freshening easterly winds will be pushed slowly eastward over the North Atlantic over the next few days.
640 PM EST Thu Nov 24 2016 Lingering low level moisture from yesterday's low pressure system keeps cloudiness around through the overnight hours tonight.
649 PM EST Thu Nov 24 2016 Warm air will overspread the area this afternoon through Friday, followed by a cold front passage Friday night with cooler and dry air for the weekend. Remainder of the afternoon: Subsidence drying in the wake of the exiting trough will allow for increasing intervals of sunshine by the afternoon. Highs in the lower to mid 60s north to lower 70s.
655 PM MST Thu Nov 24 2016 Upper ridge is building over the area with some warm advection high clouds spreading over our west this evening. Have tweaked temps and winds slightly across the lower elevations based on current conditions, but forecast is on track for lows in the 20s to lower 30s across the area.
1022 PM EST Thu Nov 24 2016 An upper level ridge will build over the region tonight. A cold front will cross the commonwealth late Friday and Friday night, bringing colder air on a gusty northwest wind.
The lower MVFR ceilings from central to northeast AR showed signs of thinning, but tonight will settle again back to central AR. A cold front will slowly sag into AR toward Friday morning, and bring patchy MVFR ceilings and a north wind flow.
935 PM CST Thu Nov 24 2016 The wind shift associated with the advance of cooler air was located just east of I-44 at 930 p. This front will continue to move southeast, bringing somewhat cooler weather to Oklahoma/north Texas for tonight and Friday. /issued 219 PM CST Thu Nov 24 2016/ A cold front with shallow cool/cold air will continue to push across Oklahoma and western north Texas through the evening hours.
1038 PM EST Thu Nov 24 2016 A low pressure center over the northern Great Lakes will move east into Ontario early Friday. A weak trough of low pressure trailing the low will drop across the area on Friday.
Skies remain clear with temperatures already dropping below freezing at most locations. The only spots still above freezing are along the foothills where light downsloping winds are offering a little bit of warming. Tonight's temperatures predicted to run a few degs F above normal for the date with mostly low/mid 20s on the plains and single digits and teens in the high country. as temperature aloft warm should see sfc temperatures increase by 5-9 degs F with mid to upper 50s at lower elevations and mostly 40s in the high country.
Otherwise, lows tonight will be in the upper 30s to lower 40s north, while the lower to mid 40s over the rest of the state. Clouds will clear on Friday as a cold front ushers in cooler and drier air. The lower MVFR ceilings from central to northeast AR showed signs of thinning, but tonight will settle again back to central AR. A cold front will slowly sag into AR toward Friday morning, and bring patchy MVFR ceilings and a north wind flow.
Chattanooga Airport, TN 47 65 38 61 / 10 0 0 0 Knoxville McGhee Tyson Airport, TN 47 63 34 57 / 10 0 0 0 Oak Ridge, TN 46 63 36 58 / 10 0 0 0 Tri Cities Airport, TN 43 60 33 52 / 10 20 10 0.
610 PM EST Thu Nov 24 2016 A weak area of low pressure will track from the western Great Lakes into Southern Ontario tonight.
515 PM CST Thu Nov 24 2016 Early afternoon water vapor imagery and mosaic radar data indicate a mid-level vorticity maximum over eastern South Dakota, a secondary perturbation over western South Dakota, and a trough axis trailing southwest into the central High Plains.
Forecast soundings show moisture trapped beneath a low level inversion, so the low clouds will continue.
Expect the lowest visibilities east of Highway 83 where dew points will be slightly higher and the saturated air will be deeper. A thin layer of ice may develop on bridges and overpasses due to temperatures falling to near freezing. High pressure does begin to shift east to replace the exiting system. Overnight lows will drop into the low 30s.
The overall pattern though will be changing heading into the daytime hrs, as strong upper disturbance traversing newd ahead of the main upper low over the mid Plains translates into the Midwest region. Given some ample curvature in the lower levels coupled with Wet Bulb Zero hts just under 10K ft, rotating cell structures may have enough support in for the development of large hail to go along with the downward transfer of convective/damaging wind gusts.
700 AM EDT Mon Mar 27 2017 Weak high pressure will move east this morning, allowing low pressure to return, bringing showers and thunderstorms this afternoon through tonight.
1111 PM MDT Sun Mar 26 2017 Water vapor shows upper trof crossing the plains, weak upper ridge building into the nrn Rockies, and next upper trof moving onshore the west coast. At the sfc, weak inverted trof extends from nern CO through wrn SD. Pcpn will end rather quickly this evening as upper trof shifts east, and weak upper ridge builds into the nrn plains. Dry weather then expected through Monday, with warmer and drier conditions for tomorrow. Monday night, upper trof will work into the Rockies with upper low forming at the base of the trof near the Four Corners. A significant piece of upper energy expected to move from sern WY into swrn SD, with lift possibly enhanced through jet coupling, bringing widespread pcpn to our swrn portion of the cwfa along a developing inverted sfc trof.
446 AM MDT Mon Mar 27 2017 Main focus in the short term is the strong upper trough currently seen on WV imagery moving on shore the NW US coast.
322 AM EDT Mon Mar 27 2017 High pressure will move east of the area tonight as low pressure approaches from the Great Lakes.
IFR conditions should develop any time now over the higher terrain and descend over to the I-35 terminals in about two hours.
Filing stacked low pressure system is tracking up through lower Michigan early this morning. Trailing secondary cold front slides down through northern Michigan later in the day and there may be another band of light showers slide through upper Michigan later in the day into this evening.
Next upper trough is now moving onto the coast. The Ecmwf looks to be doing a little better with the jet associated with the incoming upper trough. They did not the incoming trough sharp/deep enough and were too far east with the lower heights. This has helped to dry out the low levels. Made only a slight adjustment to cooler for the high temperatures. Considering this recent trend and collaboration with neighbors, have slowed down the arrival of the higher pops until later tonight.
330 AM CDT Mon Mar 27 2017 Low pressure area in eastern OK will lift northeast toward the Ohio river valley today. A brief break in the precip for Tues and Tues night as upper level ridging keeps the region dry.
156 AM EDT Mon Mar 27 2017 Showers and thunderstorms will develop today into tonight as low pressure moves to Lake Michigan.
300 AM PDT Mon Mar 27 2017 A low pressure system moving inland through Southern California early this morning will bring stronger onshore flow with strong gusty west winds in the mountains and deserts into early evening.
Upper level ridging will move east as a short wave translates from the central Plains to the Ohio/Tennessee Valleys with the southward extending trough just to our west by this evening. The associated surface cold front will remain well to the west of the local region.
additional showers and thunderstorms will continue to push slowly eastward across far Northeast Oklahoma and into Northwest Arkansas as an upper low moves through the region. On the backside of the upper low. /Issued 911 PM CDT Sun Mar 26 2017/ Severe thunderstorms continue to roll across southeast Oklahoma this evening as an upper level low spins across south-central Kansas. The severe threat will persist into the overnight hours across southeast Oklahoma into west-central Arkansas as the low level jet strengthens. Severe thunderstorms will also be possible over the next few hours near the Kansas/ Oklahoma closer to the upper level low and the surface cold front moving into the area.
A cold front will move south through the area this morning, but winds are not expected to be overly strong, and will veer around to the south after 27/21Z.
Showers will intensify this morning again as an upper level trough moves across the region with a unseasonably cold air mass aloft.
338 AM EDT Mon Mar 27 2017 A warm front will positioned over southern Virginia will track north through the Mid Atlantic this morning.
0-6KM shear is near the lower threshold for a severe risk, so given all of these factors, expect isolated to scattered mainly afternoon convection, with a few pulse-type strong/severe storms capable of producing hail/wind gusts. 13 Modest southerly flow will continue today between an area of high pressure to the east and an area of low pressure tracking from the Southern Plains northeast toward the Mid Mississippi River Valley.
/Today through Tonight/ The low pressure system that impacted the state over the weekend has moved northeast into the central Great Lakes region. Theta-e advection and the low level jet preceding the system has brought a few showers north into far southern Iowa. Good mid-level drying will occur from north to south today as the high pressure arrives. This will result in temperatures warmer than Sunday.
442 AM CDT Mon Mar 27 2017 Early morning GOES water vapor imagery showed a closed upper low centered over eastern KS, moving slowly east.
Main concerns will be convection that develops this afternoon into the night as an upper trough moves toward the Tennessee Valley and airmass become unstable.
611 AM EDT Mon Mar 27 2017 High pressure will move east of the area tonight as low pressure approaches from the Great Lakes.
351 AM EDT Mon Mar 27 2017 Under mostly clear skies with a light to moderate easterly breeze, temperatures along the Keys island chain are in the lower to mid 70s.
228 AM MDT Mon Mar 27 2017 08z surface analysis had weak high over the Dakotas with lee trough from western MT into northeast CO. Water vapour loop had departing upper trough east of the CWA taking precipitation along with it. Next upper trough now entering the west coast. Upper trough will be the main weather maker in the short term. Today, upper ridge builds over the CWA in response to upper trough moving into the Rockies.
435 AM EDT Mon Mar 27 2017 Weak high pressure will move east this morning, allowing low pressure to return, bringing showers and thunderstorms this afternoon through tonight.
337 AM CDT Mon Mar 27 2017 Water vapor imagery showing upper low over south central Kansas making slow progress east-northeast. Models are very similar mid/upper level low exiting far eastern Kansas early this morning with quick drying following.
east of surface trof. Otherwise, our attention then turns to deeper Pacific trof which will dig thru the Great Basin toward the 4-Corners over the next 24 hours. Instability along inverted trof east of Billings could be a focus of isolated showers this afternoon as daytime heating allows for up to 100-200 j/kg of cape. Greater coverage of showers, of course, will be to our west as ascent from trof and a surface cold front move in during the late afternoon and evening.
312 AM CDT Mon Mar 27 2017 The threat for severe storms this afternoon and evening remains on track as a broad upper-level trough continues to move eastward from the ArkLaTex. Pre-frontal storms are expected to develop by early afternoon in eastern MS and move into West and Northwest AL as the upper trough axis moves through.
Upper low was pinwheeling over southwest Kansas at mid-afternoon and will continue steadily eastward across Kansas tonight.
The low-level jet and some mid-level dry air may produce localized damaging winds. Besides the convection, another unseasonably mild day due to breezy southwest winds ahead of approaching upper trough.
Some freezing rain may also develop as temperatures cool down overnight and Monday morning. Any lingering precipitation should diminish by Monday afternoon as high pressure builds into the region.
Northwest winds have been more persistent in the east, where temperatures are holding stubbornly in the lower 30s. Today will be the coolest day, and guidance has trended cooler by a degree or so. Definitely tried to run with the lowest available guidance.
Plenty of mid/upper level moisture with upper ridge so while we may be starting out fairly mild temperature recovery will be minor with cloud cover.
Also adjusted minimum temperatures tonight with slightly cooler temps along the South Platte River Valley and slightly warmer temperatures along the foothills where winds will remain elevated. The upper level ridge axis will be over central CO at 00z with a moderate westerly flow aloft. On Sunday, better temperature recovery progged for the Urban Corridor and Northeast Plains, but a lingering snowfield should keep it a little cooler north and east of Akron. A southwest flow aloft will prevail over Colorado Sunday night as an upper level trough moves across California.
/issued 302 PM CST Sat Nov 19 2016/ SHORT TERM (Tonight through Sunday Night): Surface and mid level high pressure over South Texas tonight will set up a chilly night. Latest model guidance has lowered minimums a few more degrees with dew points crashing into the lower to mid 20s north and west and near 40 degrees along the coast this afternoon.
400 AM EST Sun Nov 20 2016 Strong low pressure over New England will drift NE today.
A southwest flow aloft will persist across the region through Sunday downstream of an upper level trough off the west coast.
1131 PM EST Sat Nov 19 2016 Intensifying low pressure will approach from the west overnight.
1236 AM EST Sun Nov 20 2016 A cold front will be passing through South Florida early this morning. And although a few sprinkles are possible over the Atlantic Waters associated with the passage of a weak cold front tonight, conditons in general will remain dry. Expect the lowest temps tonight over interior areas around Glades and Hendry counties with morning lows near 50.
Strong southwest flow aloft will continue to moisten in advance of an advancing upper trough.
322 AM CST Sun Nov 20 2016 High pressure ridge extended from the Upper Mississippi Valley to the Lower Mississippi Valley. Returning high level moisture west of the ridge was evident on IR satellite movie loops, in the form of cirrus clouds streaking eastward across the central Plains and into western Iowa. Today: High pressure ridge will be over the cwa providing plenty of sunshine, light winds and below normal temperatures. The cirrus plume streaking out of the central Plains should dissipate some as it approaches the ridge axis.
243 AM MST Sun Nov 20 2016 Long wave trough will shift east into the western conus, supporting an ongoing waa regime over the region.
A broad upper ridge will extend across the central U. As the 500 mb ridge axis advances over the Central Plains, an increase in mid an high cloudiness overnight. The upper trough in the west will amplify and bring increasing moisture to the Four Corners region with rain or snow showers to western Colorado and southwest Wyoming.
1139 PM CST Sat Nov 19 2016 The low pressure and cold front that brought cooler air into the area has moved into the Great Lakes region with a large amplitude ridge building into the Great Plains. High pressure dominates the region extending from southern TX up into MN with slightly below normal temperatures over the region. A hard freeze is expected over the entire area tonight with temperatures in northern MO in the lower 20s and south of the Missouri River in the mid to upper 20s.
1029 PM MST Sat Nov 19 2016 Upper ridge over the Rockies will push east into the plains overnight and into the day Sunday, with gradually increasing SW flow aloft across srn Colorado. With warming aloft continuing and wly downslope flow increasing, min temps all areas will be warmer than last night, with downslope warmed locations along and west of I-25 staying above freezing through the night. On Sunday, lee side low pressure near Trinidad deepens through the day as SW flow aloft increases.
An area of high pressure will continue to build in during the period.
Cold front knocking at South Florida's door this morning.
118 AM EST Sun Nov 20 2016 As a large trough of low pressure moves slowly through the Great Lakes, cold northwesterly winds will persist through the weekend over the Ohio Valley.
1200 AM CST Sun Nov 20 2016 At H5 Hudson Bay low with sharp trough into the southeast CONUS. Ridge along the east coast and over the Rockies from Mexico to Calgary. Closed low off the Pacific Northwest. A strong upper level ridge over the western US will slowly slide eastward through the end of the weekend. Conditions will remain dry across the central Plains as a resulting high pressure system dominates the region. Low temperatures tonight remain cool, but warmer than the previous night. With cool temperatures flowing over the warmer river valleys, there's a possibility of some shallow fog early Sunday morning. Locations further northeast will see slightly cooler temperatures in the low to mid 40s. After a warmer day on Sunday warm air advection continues through the night on Sunday.
High pressure will continue to move east over the Northland tonight. This should help the lower clouds and flurries to gradually dissipate, but more mid and upper level clouds were already moving through the Northern Plains toward the region in an area of mid level warm air advection.
Southwest flow aloft resumes today with the departure of mid-level ridge. Surface trof expected to work its way into northern sections today. Southwest half of the forecast area expected to warm up more than other sections today, owing to continued southwest winds ahead of trof.
Temperatures are currently in the upper 20s to the lower 30s and will drop into the lower to upper 20s for morning lows.
256 AM CST Sun Nov 20 2016 253 AM CST High pressure will continue to build into the western Great Lakes today and tonight resulting in fair conditions with some mid/high clouds riding down the lee of the upper ridge. Leaning towards some of the cooler bias corrected MOS guidance which seems to be capturing this well with teens west of the Fox River Valley but still maintaining mid to upper 20s for much of the Chicago Metro area.
1127 PM CST Sat Nov 19 2016 High pressure in control through Sunday.
310 AM CST Sun Nov 20 2016 Sprawling ridge of high pressure extending from Manitoba southward to Texas will dominate the weather across central Illinois today, providing sunny skies and cool conditions. Despite full sunshine and lighter winds, temps will be a couple degrees cooler thanks to a colder start to the day and limited mixing beneath the subsidence inversion only up to about 925mb. Another cold night is expected tonight as the high shifts eastward across Illinois.
1244 AM EST Sun Nov 20 2016 A cold front has moved through the forecast area.
419 AM EST Sun Nov 20 2016 Northwest winds around a large low pressure system in the Maritimes will persist through the day.
late yesterday evening moderating to -12C over the warmer Great Lake region as it shifts over southeastern Michigan by late afternoon/early evening. Temperatures will be held in the lower/mid 30s in many locations, but may be a few degrees milder as downsloping northwest flow leads to localized warming over parts of metro Detroit.
231 AM MST Sun Nov 20 2016 Upper ridge will remain in control today with dry conditions and temperatures warming into the 60s. Could be a bit warmer than model guidance which appears to be overdoing the impact of the snow field.
Warmer air mass will move into region today allowing for above normal temperatures.
Well advertised dry surface cold front over the N FL Peninsula this evening with narrow cloud band to move southward over the area tonight. Strong Canadian high pressure to filter very cold airmass into the region overnight and Sunday on breezy northerly winds.