Aikyam-Lab/Synoptic-Bench huggingface dataset:
North Texas will remain on the eastern edge of a persistent upper level ridge of high pressure on Saturday. A light south to southeast wind Saturday morning will become more east/northeast in the afternoon with the passage of a very subtle cold front. /Issued 339 PM CDT Fri Jul 14 2017/ Scattered showers and a few thunderstorms have managed to develop this afternoon as parcels of air have overcome the subsident air associated with the upper level high currently located across the Southern and Central Rockies. Due to the strong upper level ridge across the Intermountain West, North and Central Texas will experience northeasterly flow aloft through the weekend.
806 PM EDT Fri Jul 14 2017 Dry and pleasant weather will persist through Saturday as high pressure drifts south across the Great Lakes. Upper trough axis from far southeast ontario to northwest Ohio will continue to swing east this evening, leaving local area in deep layer post-frontal subsidence for the remainder of the night. Low level flow backing to wrly will allow thermal ridge to build east into the srn lakes with temps about a cat warmer vs today.
912 PM MDT Fri Jul 14 2017 High pressure over Saskatchewan has helped push a boundary through the area and convection over the region has generally shifted southward with the boundary as air has dried behind it. Latest models also kick a disturbance across the area mid evening into the late night hours, the first of the disturbances that will break down the upper ridge that has been over the area for the past several days.
/issued 329 PM CDT Fri Jul 14 2017/ (Tonight and Saturday) The large upper level low sitting west of the Big Bend area will continue to slowly push towards the west this afternoon. Any remaining shower activity is expected to dissipate by 7 PM leaving this evening and tonight dry with low temperatures in the lower 70s in most areas. Similar conditions are expected for tomorrow morning with minimal rain chances that will increase after 1 PM tomorrow due to an approaching easterly wave weakening the upper level ridge. (Saturday night through Friday) Broad upper ridging will remain north and west of the region through most of the period.
731 PM EDT Fri Jul 14 2017 An upper trough of low pressure over the Great Lakes will move east tonight and move across northern New England Saturday while weak low pressure moves to our south. Scattered showers and widely scattered thunderstorms will be along and in advance of this trough tonight and Saturday.
1146 PM CDT Fri Jul 14 2017 High pressure over Minnesota will drop southeast into Illinois over the next 24 hours. Drier air is filtering south out of the high this afternoon. but dewpoints remain in the low to mid 70s along and south of the I-70 corridor this afternoon. Sky should clear out over most of the area tonight and with drier air pushing in the temperatures should drop into the low to mid 60s over much of the area. Saturday still looks dry and seasonably warm under the influence of high pressure with highs mainly in the mid 80s with low humidity and light northeast flow.
/issued 258 PM CDT Fri Jul 14 2017/ Gulf moisture associated with an inverted trough across the Big Bend area is slowly pushing northward and eroding mid level dryness that has been present for some time over the FA. The upper ridge dominating the western half of the CONUS will flatten over the weekend as an upper level trough pushes across Canada. This will weaken the ridge allowing for slight height falls.
Expect VFR conditions to prevail across the area through the rest of the evening into Saturday as the 500mb ridge across the southwest United States extending into the state provides subsidence across southwest Texas.
Mid-level ridging aloft across the area with low- level ridge axis over north FL.
508 PM MDT Fri Jul 14 2017 Noticeable downturn in convection this afternoon as an upper level ridge continues to amplify aloft. However, the spin associated with the remnant area of low pressure can still clearly be seen on satellite imagery this afternoon. This low has provided enough lift and additional moisture to fuel scattered showers and thunderstorms over the central and southern Colorado mountains. Elsewhere, the effects from the building ridge have already been felt with temperatures warming several degrees and relative humidities lowering quite a bit compared to this time yesterday.
1055 PM EDT Fri Jul 14 2017 Late evening surface analysis depicts depicts the axis of Atlantic ridging extending across the Georgia coastal waters. deep layered ridging was centered directly over our region, while a trough was digging southeastward from the Great Lakes states into the Mid-Atlantic states. A dry and subsident air mass associated with the deep layered ridge limited convective coverage this afternoon to north central Florida, and this activity has been steered into the Florida Big Bend area. The deep layered ridge will only slowly shift southward on Saturday as troughing over the Mid-Atlantic states progresses into the southern Appalachians. Convection should shift west of our region towards sunset, with some activity lingering into the evening hours to the north of the Altamaha/Ocmulgee Rivers as the trough edges southward and closer to our region.
940 PM CDT Fri Jul 14 2017 Quiet weather expected across central and southeast Illinois overnight as high pressure builds into the area. The much drier air mass will allow lows to be noticeably cooler than it has been lately. Cold front has pushed south of our far southeast CWA this afternoon. This drier air will overspread the forecast area tonight, as high pressure in Minnesota settles southeast into central Illinois by early Saturday morning. The first half of the weekend looks quite nice as a result, with highs on Saturday in the lower 80s after starting off in the upper 50s in some areas. The upper ridge currently over the Rockies will edge eastward and flatten a bit, allowing the center of a 594 dm high pressure to push into the mid-Mississippi valley.
501 PM MDT Fri Jul 14 2017 Surface analysis shows low over southeast MT with trof extending southward across eastern WY. Warm front is lifting through western SD and temps already near or at 100F across many plains locations. The beginning of TSRA already forming across northeast WY around the Gillette area along the surface trof. Temps will likely be a degree or two cooler.
940 PM EDT Fri Jul 14 2017 An upper trough of low pressure over the Great Lakes will move east tonight and move across northern New England Saturday while weak low pressure moves to our south. Scattered showers and widely scattered thunderstorms will be along and in advance of this trough tonight and Saturday.
Night/morning low clouds and fog will be restricted to coastal areas for the weekend as the marine layer becomes shallower under strengthening high pressure aloft. The ridge will shift north to the NV/UT/AZ border. The heights aloft will increase and create a warming trend through Saturday, increasing 850 mb temperatures to around 26 deg C near the coast, to around 31 deg C over the High Desert by Saturday afternoon.
1240 AM EDT Sat Jul 15 2017 Atlantic high pressure will persist across the region through Saturday.
Also updated the forecast to account for cooler temperatures as there has not been as much cloud cover through the evening. Chattanooga Airport, TN 72 87 71 88 / 40 60 40 40 Knoxville McGhee Tyson Airport, TN 71 86 69 87 / 40 50 30 20 Oak Ridge, TN 71 87 69 88 / 50 50 30 20 Tri Cities Airport, TN 70 85 65 86 / 50 50 30 10.
630 PM CDT Fri Jul 14 2017 248 PM CDT No significant weather expected through the period, as high pressure pushes overhead tonight into Saturday.
Temps across the area are generally in the low 90s with heat index values near 100. We will start to see a bit of a transition in the pattern beginning on Saturday as a weak cold front shifts through, or washes out over, the region. Deep layer, and strong ridging, through the upper levels will moderate as a short wave trough swings through the SE US.
North Texas will remain on the eastern periphery of a persistent upper level ridge through Saturday. However, additional storms are possible on Saturday since moist and unstable air will remain in place and a weak disturbance and ill-defined cold front will move in from the north/northeast. /Issued 339 PM CDT Fri Jul 14 2017/ Scattered showers and a few thunderstorms have managed to develop this afternoon as parcels of air have overcome the subsident air associated with the upper level high currently located across the Southern and Central Rockies. Due to the strong upper level ridge across the Intermountain West, North and Central Texas will experience northeasterly flow aloft through the weekend.
839 PM MDT Fri Jul 14 2017 Latest data is showing a slower eastward trend with the storm activity tonight, which is not unreasonable given the presence of the ridge overhead. Have therefore kept the higher PoPs and QPF amounts over mainly the southwest and southern portions of the forecast area through Saturday with the possibility of localized heavy rainfall amounts that could lead to localized flash flooding.
1253 AM EDT Sat Jul 15 2017 Dry and pleasant weather will persist today as high pressure drifts south across the Great Lakes. Upper trough axis from far southeast ontario to northwest Ohio will continue to swing east this evening, leaving local area in deep layer post-frontal subsidence for the remainder of the night. Low level flow backing to wrly will allow thermal ridge to build east into the srn lakes with temps about a cat warmer vs today.
959 PM MDT Fri Jul 14 2017 Surface analysis shows low over southeast MT with trof extending southward across eastern WY. Warm front is lifting through western SD and temps already near or at 100F across many plains locations. The beginning of TSRA already forming across northeast WY around the Gillette area along the surface trof. Temps will likely be a degree or two cooler.
926 PM CDT Fri Jul 14 2017 Convection along a southward moving outflow boundary which began earlier this morning across Central Arkansas has now made it into the Lower Toledo Bend and Sam Rayburn Country of Deep East Texas. /issued 720 PM CDT Fri Jul 14 2017/ For the ArkLaTex, a prefrontal convective push from the North today with weak high pressure is building down the MS valley.
However given the scattered nature of the lower wind chills, and the warmer condition, have let the wind chill advisory expire. Model trends in the last few runs continue to support upper ridging over the western U.
302 PM EST Tue Jan 2 2018 Canadian high pressure building toward the region overnight will move east of the region Wednesday.
1215 PM EST Tue Jan 2 2018 Bitterly cold and very dangerous wind chills can be expected this morning as arctic high pressure remains entrenched over the Midwest.
High pressure was centered over northwest Missouri at 08Z with ridge axis still located along the IA/NE border. Will continue wind chill advisory into the morning as temperatures remain quite cold and winds should increase after sunrise as the high moves further south. Winds will become southwest and increase into the afternoon bringing some moderation to the bitter cold of the past couple of days before the next cold front arrives late this afternoon and this evening.
1202 PM EST Tue Jan 2 2018 A large area of high pressure will slide east across the Ohio Valley today into tonight. Low pressure will move east across the northern lakes Wednesday, forcing a cold front through the area Wednesday night.
High pressure will prevail across the region through the week as temperatures continue to run above normal with highs mostly in the 70s. A cutoff cyclonic circulation near 29N 134W was pumping copious amounts of high clouds through a pronounced ridge axis and into the forecast area this morning.
1237 PM CST Tue Jan 2 2018 Cold frontal snow band has pushed through the fargo-Moorhead area and is now along a Bemidji-Mahnomen-Gwinner line. Cold frontal boundary and associated band of light snow just passed through the GF- EGF area and will continue moving south- southeastward through the late forenoon and early afternoon. Expect temperatures to rise a quick 5 to 10 degrees with the cloud cover but drop off again as skies clear behind the cold front. Short wave will brush the area and bring a cold front out of Canada. Cold front is expected to move into the northern Red River Valley by mid afternoon. Another high pressure system will follow and settle over central ND by Wed morning. At the surface, high pressure builds down into the FA, which should keep winds on the low end.
350 PM CST Tue Jan 2 2018 It was another cold start to the day, though slightly (ever so slightly) warmer temperatures will prevail tonight, but cold temperatures are still expected through the work week before we get a brief warm up and some much needed moisture this weekend. Of the two troughs, the first is a bit farther south and west, across Kansas and Oklahoma today. However, the secondary trough, currently sliding into Nebraska and Iowa, will skate through far northern Missouri late tonight.
1234 PM EST Tue Jan 2 2018 High pressure brings mostly snow-free weather from this afternoon through Wednesday. Latest DaySnow-Fog RGB on GOES-East shows stratocu deck finally succumbing to increased warm air advection in the low-levels. It will still be cold, but high pressure building in will calm the winds at the surface and keep wind chill values from reaching the -10 criteria for southern zones. Temperatures should rise into the 20s across most areas during the afternoon, reaching the highest levels in over a week.
For Wednesday night, a weak surge of high pressure moves into the region.
There is a band of snow currently across southern MN and NW WI associated with a mid level short wave and a weak cold front. The good news for tonight is that lows will be a touch warmer than what we've seen the last several night.
On Wednesday a weak mid level weather disturbance is expected to pass through a weakness in the large high pressure ridge.
249 PM MST Tue Jan 2 2018 Upper level ridge of high pressure continues to build over the Pacific Northwest. As a result warmer temperatures will slowly move back into North Central and Southwest Montana over the next few days.
Temperatures continue to climb in the warm sector this morning and could mix out to even warmer than in the forecast. We get a shot of weak cold advection behind the clipper, however guidance winds and BUFKIT mixed down suggests winds will only top out in the 20 to 30mph range, which shouldn't cause any significant problems with blowing and drifting - unless we get into more sunshine than clouds during peak heating - and we gets some melting/refreezing on pavement. However, the weekend will see a temperature pop an a deep upper trough shifts east and an upper ridge briefly moves over the plains.
228 PM EST Tue Jan 2 2018 Arctic air persists under strong high pressure into mid week. Cold front and upper trough for latter half of the week. High pressure still firmly in control of the sensible weather across the area. Temperatures in the lowlands approach freezing, but will likely fall just short for most on Wednesday.
245 PM MST Tue Jan 2 2018 High pressure will prevail across the region through the week as temperatures continue to run above normal with highs mostly in the 70s. A cutoff cyclonic circulation near 30N 133W continues to pump copious amounts of high clouds through a pronounced ridge axis and into the forecast area.
144 PM CST Tue Jan 2 2018 Upper-level trough digging south across Oklahoma and Arkansas allowing for increased low cloud-cover across northeast Texas, southeast Oklahoma and southern Arkansas this afternoon. Not expecting any precip with trough as it shifts southeast across the ArkLaTex this afternoon and tonight. By mid-evening, clearing line is expected from near El Dorado to Lufkin as low-level trough bisects the region and rapidly exits the to the east.
The bone dry ground will also encourage milder temperatures, and expect some western locales to crack freezing for a few hours before sunset. On Wednesday the weak surface boundary that moved into western Kansas Tuesday night will lift back north as a warm front and warmer/more seasonal temperatures return to western Kansas.
208 PM EST Tue Jan 2 2018 KBYX detects patchy, light rain over the Lower Keys, as well as over nearshore and offshore waters surrounding the Lower Keys. Temperatures are in the lower 60s.
1045 MB high pressure centered over Missouri will continue to control the wx across Mid TN today.
Upper level ridge is strong and will take a while to break down in response to a west coast trough. The ridge axis does push east, and switches the upper level flow to more southerly.
Surface observations indicate low clouds and patchy freezing fog continue across much of the forecast area. Otherwise low pressure system offshore will continue to spread mid and high level clouds across the region. Temperatures will be similar to yesterday with highs in the 20s to lower 30s in the low cloud area with light winds. The upper level ridge remains over the region tonight into Wednesday with a weak short wave passing by to the northwest. Low level inversions will continue as upper level ridging remains anchored overhead. BDN/RDM are near the edge of the LIFR stratus/freezing fog deck and should improve to VFR by 21Z as it slowly retreats to the north. Spotty very light freezing drizzle will continue to be possible out of the low stratus deck, especially when surface winds become upslope.
1045 MB high pressure centered over Missouri will continue to control the wx across Mid TN today. VFR will continue through the next 24 hours as arctic high pressure maintains control of local wx.
Cool, dry weather and east winds near the Gorge will give way to wetter pattern late in the work week with a chance of freezing rain in the Columbia River Gorge.
The pattern is rather stagnant with above normal temps continuing under high pressure aloft. The higher clouds seem to be inhibiting the proper radiative action for dense fog to form. High pressure aloft remains over California along with a weak low pressure trough over the Pacific Ocean to our west that's streaming all these clouds in our direction.
Upper level trough axis will move east of the area tonight, sending a reinforcing surge of high pressure southward into the area. There is a slight concern if any drizzle develops this evening/tonight as temps fall below freezing. Low tonight will be very cold and most locations will experience a hard freeze with temps in the low 20s up north with mid/upper 20s elsewhere. A freezing warning is in effect for all of South Texas tonight.
243 PM CST Tue Jan 2 2018 This evening an upper level short wave trough will move southeastward through the area.
151 PM CST Tue Jan 2 2018 Arctic high pressure at the surface is still strong into tonight, but a cold front will make passage on Wednesday.
1034 AM MST Tue Jan 2 2018 Imagery shows amplified ridge ovr the wrn CONUS with a dry embedded SW Trof moving swd through MT/WY into a large broad Trof across the rest of the ern CONUS. Further upstream, a brewing nearly stationary upper low resides ovr the EPAC to the WSW of California. A nearly stationary frontal boundary resides to the south and west of this high. Very cold SFC temps are accompanying this High P system with SFC temps currently ranging to the minus 20 and 30s from the Dakotas into MT. Much warmer temps in the (+) 20s are found south and west of the stationary front.
Another extremely cold morning, as Arctic high pressure extends from Nebraska into central Illinois. Overall, the forecast features improvement with the eventual abatement of dangerous wind chills by midday and "warmer" temperatures as the Arctic high continues to shift into MO and winds turn from the SW in strengthening WAA regime. SW wind and abundant sunshine today should aid in temperatures being several degrees warmer compared to yesterday, with all locations climbing above zero. Highs are expected to range from the single digits to the lower teens south.
High pressure over the region will briefly weaken today. This will allow a weak low pressure system to move across the area tonight for a threat of spotty light snow on the mountains.
Remainder of the week remains mild although with potentially poor mixing as ridge builds over the region.
349 PM EST Tue Jan 2 2018 Canadian high pressure building toward the region overnight will move east of the region Wednesday.
This is associated with an approaching upper trough.
1026 AM MST Tue Jan 2 2018 Ridging still extends along the left coastline of NOAM with deep and expansive troughing takes the eastern 2/3 of the continent. However very dry air and a clear night should allow temperatures to plunge with the Yampa and Upper Gunnison Basins dropping well below zero as well as some of the higher mountain valleys. High level moisture slowly returns on Wednesday as troughing the Eastern Pacific drives the Western ridge inland a bit.
1127 AM CST Tue Jan 2 2018 18Z TAFS High pressure at the surface centered over Oklahoma and Arkansas combined with an upper level trough progged to swing quickly through the area tonight will result in a continued altostratus deck across much of the region through early Wednesday. Of note for tonight, both GFS and ECMWF show a mid to upper level trough moving across our region, but with limited moisture, not adding any chance for snow tonight.
257 PM CST Tue Jan 2 2018 Sharp upper trough axis sweeping across the region this afternoon.
1023 AM CST Tue Jan 2 2018 Cold frontal boundary and associated band of light snow just passed through the GF- EGF area and will continue moving south- southeastward through the late forenoon and early afternoon. Expect temperatures to rise a quick 5 to 10 degrees with the cloud cover but drop off again as skies clear behind the cold front. Short wave will brush the area and bring a cold front out of Canada. Cold front is expected to move into the northern Red River Valley by mid afternoon. Another high pressure system will follow and settle over central ND by Wed morning. At the surface, high pressure builds down into the FA, which should keep winds on the low end.
It remained bitterly cold early this morning across the area with the Arctic high pressure centered just to the northwest of the forecast area. Have adjusted short term grids slightly warmer in the southwest for the early morning hours.
This afternoon high temps will range from the upper teens to the lower 20s under plenty of sunshine. High pressure currently centered over northern Missouri will move east toward our area today. A cold front will approach the area on Wednesday afternoon. A few spots across southern Kentucky may break the freezing mark.
343 PM CST Tue Jan 2 2018 18Z surface data has arctic high pressure over the lower Mississippi Valley with a weak frontal boundary from northwest Minnesota into southwest South Dakota. Due to cloud cover and warmer air moving into the area, lows tonight will be much warmer than the past two nights.
1225 AM EST Fri Jan 26 2018 High pressure will extend down the Eastern Seaboard today, before shifting offshore tonight.
239 AM CST Fri Jan 26 2018 Clear skies and light winds are over the mid state early this morning as the upper ridge moves over the region. The upper ridge will allow temperatures to warm up a bit more than yesterday with most of the area seeing the low 60s. Min RH values this afternoon will be in the 20 to 30 percent range, however if winds pick up a bit further and mix the low levels more, higher surface temps as well as drier air will move to the surface, and min RH values could be lower.
1049 PM MST Thu Jan 25 2018 The forecast area will be under southwest flow aloft tonight ahead of an upper trough and associated cold front that move through Friday.
252 AM EST Fri Jan 26 2018 High pressure heads east today, with southwest flow ushering in milder air to start the weekend.
115 AM EST Fri Jan 26 2018 High pressure will extend down the Eastern Seaboard today, before shifting offshore early tonight.
321 AM CST Fri Jan 26 2018 High pressure over the Southeast U. An upper level trough over the Western U.