Aikyam-Lab/Synoptic-Bench huggingface dataset:
211 PM CDT Tue Aug 18 2020 Temperatures have been coming up a bit quicker than initially thought this afternoon, and with Medora and Beach already seeing observed temperatures of 97 thus far, think it is likely that we will see a handful of sites in the low 100s before all is said and done. A stationary/pseudo warm front is currently just east of the Highway 83 corridor, drifting east slowly. Later on tonight, a better chance for showers and thunderstorms looks to be possible across the southern James River valley as another subtle wave rides down the ridge on the nose of stronger warm air advection.
Rain chances for the weekend will likely be graded higher along the coast to lower over our far inland counties even as the upper ridge axis settles across the N/NW Gulf coast region. 41 Light northerly flow today with high pressure over OK/N TX and lower pressures over LA coast.
dewpoints now in the lower 70s area-wide. Strong upper ridge to remain centered over the W CONUS, with upper trough over E NOAM with trough axis just to our west generally extending from E Can SW to the cntrl Gulf Coast.
00 inches and dewpoints in the lower 70s from Augusta through Columbia to Bishopville. Strong upper ridge to remain centered over the W CONUS, with upper trough over E NOAM with trough axis just to our west generally extending from E Can SW to the cntrl Gulf Coast.
Scattered rain and thunderstorms are coming to an end across the Mid State and will leave cooler temperatures in their wake.
Northerly winds will increase after daybreak as mixing commences once again and highs will be near or a little cooler than today's readings as northerly flow results in continued weak cold advection.
354 PM MDT Tue Aug 18 2020 High pressure aloft and at the surface has produced a record setting 100 degree reading at Denver International Airport this afternoon.
Deep mid-level trough extends down the MS/OH Valleys reaching towards the Gulf of Mexico while at the surface, the ridge axis maintains positioned just south of the area, resulting in continued south/southwesterly flow through the period. Temperatures will rise to the lower 90s in the afternoon, dropping to the mid/upper 70s overnight.
/issued 313 PM EDT Tue Aug 18 2020/ The mid/upper level troughing will persist over the eastern U. south into the central Gulf of Mexico through midweek then retrogrades into the western gulf late in the week and weakens over the weekend as ridging gradually builds over Florida from the east.
With the more humid air in place along the front, expect warmer temperatures Tuesday night (only dropping into the mid to upper 60s). At the same time an upper low aloft pushes southward augmenting forcing along the front. This should keep high temperatures a bit cooler, in the mid 80s to around 90 degrees. The low meanders at the base of the upper level trough axis over the Tennessee Valley and its associated surface front moves little Wednesday night.
617 PM CDT Tue Aug 18 2020 High pressure will bring dry conditions, fairly low humidity, and slightly below normal temperatures to central Illinois the next few days. For Wednesday, highs should only reach the low 80s, a few degrees below normal, with dewpoints likely remaining below 60 degrees, several degrees drier than normal. The high pressure axis should pivot over northern and central IL much of the remainder of this week keeping dry conditions and light east to northeast winds, limiting any return of moisture.
/Issued 205 PM CDT Tue Aug 18 2020/ Upper ridge to the west and a trough to the east has resulted in weak northerly flow across the area. ECMWF remains most bullish on developing little if any precip through the period as upper flow remains rather weak over the area and quality moisture from the gulf is cut off with a deepening trough to the east. Warmer temps are expected this weekend as southerly surface winds return to the region.
Temperatures have been coming up a bit quicker than initially thought this afternoon, and with Medora and Beach already seeing observed temperatures of 97 thus far, think it is likely that we will see a handful of sites in the low 100s before all is said and done. A stationary/pseudo warm front is currently just east of the Highway 83 corridor, drifting east slowly. Later on tonight, a better chance for showers and thunderstorms looks to be possible across the southern James River valley as another subtle wave rides down the ridge on the nose of stronger warm air advection.
743 PM CDT Tue Aug 18 2020 High pressure will bring dry conditions, fairly low humidity, and slightly below normal temperatures to central Illinois the next few days. Dew points by late tonight are likely to be in the lower 50s over most of the forecast area, with pleasant sleeping conditions. For Wednesday, highs should only reach the low 80s, a few degrees below normal, with dewpoints likely remaining below 60 degrees, several degrees drier than normal. The high pressure axis should pivot over northern and central IL much of the remainder of this week keeping dry conditions and light east to northeast winds, limiting any return of moisture.
938 PM CDT Tue Aug 18 2020 (Issued 938 CDT Tue Aug 18 2020) High pressure building into the region will dominate our weather regime tonight and Wednesday. Gagan (Issued 248 PM CDT Tue Aug 18 2020) Tonight through Wednesday night: High pressure will bring continued pleasant weather through Wednesday. A lake breeze will move inland late morning or early afternoon, with somewhat cooler conditions near the lake.
Wednesday will be a bit cooler and not as dry, with greater thunderstorm potential as monsoon moisture continues to increase around the periphery of the strong western CONUS high. More monsoonal moisture aloft looks to move into the area on Wednesday, which despite being under ridging still, will help to slightly cool things off and allow dewpoints to rebound every so slightly.
925 PM EDT Tue Aug 18 2020 A cold front moves offshore tonight into Wednesday.
The radar was echo free, skies were sunny, and temperatures were in the lower 90s. The 00Z KKEY RAOB was not especially moist through the lower troposphere, with meager moisture above 850 mb.
745 PM EDT Tue Aug 18 2020 Strong surface based high pressure building into the central Great Lakes with northwest flow aloft will maintain VFR conditions through Wednesday. * None Influence of a thermal trough with h850 temperatures ranging between 7-10C and northerly surface flow have kept temperatures in check today, with the forecasted highs in the low to mid 70s now in place across most of SE MI. This will again support slightly cooler than normal temperatures with temperature highs in the mid to upper 70s with continued dry weather. Otherwise, return flow from the advancing high will start to usher in warmer air across Michigan from west to east after 18Z Wednesday, with a tighter baroclinic zone and better moisture quality found north of the cwa, across northern lower Michigan and into the Upper Peninsula.
611 PM EDT Tue Aug 18 2020 High pressure will keep conditions dry through the remainder of the week.
Rain chances for the weekend will likely be graded higher along the coast to lower over our far inland counties even as the upper ridge axis settles across the N/NW Gulf coast region. 35 Light northerly flow today with high pressure over OK/N TX and lower pressures over LA coast.
610 PM CDT Tue Aug 18 2020 (This evening through Wednesday) Closed upper high across the western U.
These possible showers are associated with a weak passing short wave trough. Large scale pattern will generally remain unchanged into late week, with searing ridge parked over the Desert Southwest and deep troughing dominating much of the eastern CONUS. Locally, that means continued northwest flow aloft and a gradual loss of influence from departing surface ridging just to our south.
Also of note is a weak pre-frontal trof extending from sern LA to the adjacent Gulf waters off Vermilion/Atchafalaya Bays. Water vapor imagery/00z upper air analysis show troffing in place from ern Canada swwd through the n-cntl Gulf. The nrly flow behind the trof is maintaining dry conditions over much of the area, but regional 88Ds show off/on convection continuing to develop along the trof, mainly over the coastal waters to our east. best POPs remain across the sern zones in proximity to the low aloft.
A high pressure dome centered over the Intermountain West with attendant ridge extending up through the northern Rockies remains the dominate feature to the west. Out east a deep trough was situated over the eastern CONUS.
1105 PM CDT Tue Aug 18 2020 High pressure will bring dry conditions, fairly low humidity, and slightly below normal temperatures to central Illinois the next few days. Dew points by late tonight are likely to be in the lower 50s over most of the forecast area, with pleasant sleeping conditions. For Wednesday, highs should only reach the low 80s, a few degrees below normal, with dewpoints likely remaining below 60 degrees, several degrees drier than normal. The high pressure axis should pivot over northern and central IL much of the remainder of this week keeping dry conditions and light east to northeast winds, limiting any return of moisture.
1132 PM EDT Tue Aug 18 2020 High pressure over the Great Lakes will build southeast across Pennsylvania the second half of this week, then pass off the Mid Atlantic coast by the weekend.
1216 AM CDT Wed Aug 19 2020 As high pressure begins to return to the region, VFR conditions are expected with light winds. Dewpoints in the mid 60s and clearing skies should allow most areas to dip into the low 70s with the more urbanized areas holding onto a bit warmer temps in the mid 70s. South Central Texas will still be on the eastern fringes of the high and could see northeast winds around 10-15 mph for Wednesday afternoon.
This regime will maintain weak dry air advection in the low-levels, and the resultant surface dewpoints in the 50s will make the mid 90s highs much more bearable. There'll be a small increase in high clouds later today as upper tropospheric moisture spills southward over the western US ridge.
234 AM CDT Wed Aug 19 2020 High pressure will dominate the weather pattern across the area for the next few days. 00z upper air analysis placed a strong ridge from the southwest U. Weak northwest flow prevailed locally, behind the mid level trof which extended from the eastern Great Lakes down through the Ohio Valley. At the surface, 06z surface map placed an elongated 1018 mb ridge axis from Lake Superior southwest into northern MO. Northeast flow on the eastern side of the ridge resulted in seasonably cool and dry air across central IL. Tonight the ridge axis sinks south into the northern CWA and with clear skies, calm winds, and low dewpoint depressions, fog will be possible.
Temperatures will again be warm/hot today and Thursday given potential for deep mixing ala dry adiabatic lapse rates, and H85 temps upwards of or warmer than 20C. , with a ridge meandering up through western Canada. A trough moving along the Canadian/U.
East/northeast winds around this ridge will continue to advect dry, cool air into the bi-state area. This afternoon should see temperatures a touch cooler than yesterday, or right around 80 degrees for most of the area. Favored river valleys in east-central and southeast Missouri may even dip into the lower 50s. For Thursday, look for a slight moderation in temperatures as highs reach the low to mid 80s.
High pressure builds in tomorrow with clearing skies and cool overnight lows along with valley fog in the early mornings. High pressure builds in at the surface tomorrow with air continuing to dry out. Cool 850 temperatures keeps highs to the low to mid 70s and dew points in the low 50s will make it feel a little like fall.
High pressure builds in this afternoon with clearing skies and cool overnight temperatures along with valley fog in the early mornings. High pressure builds in this afternoon with clearing skies and lots of sunshine to end the day. Temperatures will remain cool for this time of year, with highs generally in the 70s and possibly some cooler spots only into the upper 60s in the Catskills.
228 AM CDT Wed Aug 19 2020 A large upper level high pressure area centered near the four corners region will move little the next seven days and will be the main weather influence across west Texas and southeast New Mexico.
Overnight lows dip back into the low to mid 50s. The upper pattern evolution through the remainder of the short-term will partially be dictated by the expansive blocking anticyclone in the vicinity of the Four Corners region.
255 AM CDT Wed Aug 19 2020 Today through Thursday: A ridge of high pressure oriented from the central Plains through the Great Lakes region will dominate today as the ridge slowly shifts east. Overall, soundings are dry and with the low level thermal trough retreating with the return flow, the CU potential looks reduced. With the high to the east on Thursday the return flow amps up a bit more with a bump in the 925/850 temps.
After sunrise low level mixing should allow for the low clouds to dissipate. Upper trough overhead looks to continue to deepen during the day today, and allow for diurnal convection this afternoon. High over the mountain west is in no hurry to move or weaken, so the trough will linger over the eastern CONUS over the next few days.
Otherwise, temperatures should be subtly cooler today with highs a tad below seasonal climo and comfortable daytime humidity values again. Darmofal The center of the upper ridge will build slightly north across the Four Corners region over the weekend.
255 AM CDT Wed Aug 19 2020 A high amplitude pattern at the beginning of the period will be defined by a large ridge over the southwest US and trough over the east CONUS. The trough will be across our area, with a low developing over the Gulf Coast states, gradually drifting north with time.
Strong, broad ridging will remain in place across the Western CONUS through much of the period. This sheared trough axis will help to drive the weather pattern through the end of the week. Due to increasing southerly flow and location relative to the trough axis rain chances will gradually increase east of the MS river through the workweek. Upper troughing looks to gradually lift to the northeast by the latter half of the weekend while ridging starts to breakdown to the west. Temperatures will also start to trend a couple degrees warmer with highs in the low 90s and lows in the low 70s.
413 AM EDT Wed Aug 19 2020 Cooler air will filter into the region today. High pressure will bring dry and cool conditions tonight and Thursday.
247 AM CDT Wed Aug 19 2020 Persistent northerly upper flow along with surface ridging conditions will ensure at least a few more days of below normal temperatures and low humidity. Nudged high temps today up just a bit over the NBM, and will continue to favor the cooler MAV/MET lows the next few nights with 50s likely across northwest AR.
1054 PM CDT Tue Aug 18 2020 (This evening through Wednesday) Closed upper high across the western U.
Tonight Through Thursday An upper level ridge will be in place over the Wern CONUS while an upper level trough will be in place over the ESE CONUS through the period.
312 AM CDT Wed Aug 19 2020 08Z water vapor imagery showed a strong upper level ridge centered over UT while an upper low was over the Gulf of Alaska. Surface observations showed a broad high pressure system ridging from the Upper Midwest into the central plains with relatively dryer air into the mid MO river valley. This along with 850MB temps holding steady suggests afternoon highs should be in the lower to middle 80s once again. There may be a few more mid and high clouds tonight over central KS that may keep overnight lows in the lower 60s. There is little change to the pattern expected by the models through the weekend as upper ridging remains centered near the four corners region.
This will support lake effect clouds and spotty showers east and southeast of Lake Ontario, while high pressure will provide MAINLY fair dry weather to the remainder of the region. Advancing high pressure will provide the remainder of the area with fair dry weather. Temperatures only making it into the lower to mid 70s, with higher terrain remaining in the 60s. Fair weather will persist through the later half of the work week and first half of the weekend as high pressure will drift off and exit into New England.
1123 PM EDT Tue Aug 18 2020 High pressure over the Great Lakes will build southeast across Pennsylvania the second half of this week, then pass off the Mid Atlantic coast by the weekend.
SE Oregon and SW Idaho will remain situated between strong high pressure aloft centered near the Nevada/Utah border and an upper trough off the northwest coast. Drier/more stable air will start to move into portions of SE Oregon, but a chance of afternoon showers and thunderstorms returns to Baker County and the higher elevations of SW Idaho. A cold front will move through Wednesday night, resulting in cooler temperatures on Thursday.
326 AM CDT Wed Aug 19 2020 A large area of high pressure was located over the Midwest and Great Lakes. As of 2 AM, temperatures across eastern Iowa and northwest Illinois ranged from the low 50s to near 60 F, and winds were either around 5 kts or completely calm. Nice August weather expected with highs in the lower 80s, comfortable humidity, and light winds.
Dry conditions expected today with building high pressure. Dry conditions and near normal temperatures will persist Thursday as high pressure remains in control.
Showers and isolated thunderstorms may move around the eastern periphery of the upper high over Utah.
The amplified high pressure continues its hold over the western half of the U. with troughing over the East Coast. This leaves our area in northwest flow aloft, helping us stay cooler than normal this week. High pressure is moving in from the north at the surface, which is also helping us not only stay cooler, but also dry with low humidity. High temperatures today through Thursday will be in the low to mid 80s, with lows in the upper 50s to low 60s.
Wednesday and Thursday will be the coolest and driest days as high pressure promotes chilly mornings and mostly sunny but mild days.
315 AM EDT Wed Aug 19 2020 Synopsis/Discussion/Marine -Dry pattern with a warming trend The upper trough currently over the GrtLks region lifts out by Thursday and the northwest flow aloft is replaced by a weak zonal flow.
Today Through Thursday Night An upper ridge is centered near the Four Corners region and will continue to provide northerly flow over the Plains. An upper trough over the eastern U. The ridge will remain stationary through Thursday and the pattern will remain the stagnant over Arkansas.
Very hot temperatures will continue through much of the week with Excessive Heat Warnings in effect for the lower elevations of northern Arizona through Thursday. Showers and thunderstorms have developed along the Mogollon Rim this afternoon and will continue to advance southwest into the lower elevations of Yavapai and Gila counties through the afternoon/evening. Strong high pressure will remain centered over southern Nevada/western Utah will continue to bring miserable daily highs across much of the area through Thursday. Towards the end of the week, the high will shift eastward over the area and lose some amplitude. Monsoon activity will remain low and mainly along the high terrain each afternoon. Gusty winds and small hail will remain the main threats as the lower levels remain dry. Storms will move southwest into the lower elevations through the remainder of the afternoon and evening.
356 AM EDT Wed Aug 19 2020 High pressure building north of the Ohio Valley will keep generally dry and cool conditions over the region through the end of the week. This high will move off of the East Coast and then extend a ridge westward through the region to the Midwest.
Similar conditions are expected Wednesday afternoon as the H5 ridge slowly gets deflated by the upstream trough. Models are indicating another weak trough moving from central ID into SW MT Thursday, helping to increase surface flow over western WY and bring isolated convection to most of the area during the afternoon and evening hours.
143 AM EDT Wed Aug 19 2020 High pressure will keep conditions dry through the remainder of the week.
308 AM CDT Wed Aug 19 2020 Strong, amplified upper level high pressure persists over the intermountain west with meridional northerly flow over the Great Plains.
A weak area of low pressure is also located near CHA. Confidence is highest at CHA with proximity to the weak low pressure system to the south, but impacts can't be ruled out at the other sites. BW Chattanooga Airport, TN 89 67 85 68 84 / 60 40 70 60 80 Knoxville McGhee Tyson Airport, TN 86 66 84 67 83 / 40 40 60 40 80 Oak Ridge, TN 86 65 84 68 84 / 50 40 60 30 80 Tri Cities Airport, TN 83 62 81 64 81 / 50 30 60 40 80.
Temperatures will once again climb to the low 80s after a cool start in the upper 50s.
233 AM CDT Wed Aug 19 2020 A large dome of summertime high pressure was centered over the Great Basin this morning, as long wave troughing persisted across the eastern third of the conus. The Ozarks Region were under the inflection of these two waves, allowing for cooler than normal weather with less humidity than what typically August brings. A weak cutoff low will develop on Thursday over the lower Mississippi River Valley, helping to reaffirm the current positive PNA pattern.
610 AM EDT Wed Aug 19 2020 Aviation -Dry pattern with a warming trend The upper trough currently over the GrtLks region lifts out by Thursday and the northwest flow aloft is replaced by a weak zonal flow.
as there are no notable disturbances in northwesterly flow as the ridge across the intermountain west retrogrades into the desert southwest directing any convection tonight across the high plains and west of the local area.
Concur with deterministic output which maintains a quasi- stationary upper ridge centered over the Four Corners region, and an upper trough with axis from the Mississippi Valley to the CNTRL/WRN Gulf of Mexico.
943 AM CDT Wed Aug 19 2020 Broad surface ridging remains in place from the Great Lakes region southwest to Oklahoma this morning. Looking aloft, a strong mid level anticyclone was centered over the Four Corners, with strong northerly flow over the Plains, and troughing over the eastern CONUS. /Issued 247 AM CDT Wed Aug 19 2020/ Persistent northerly upper flow along with surface ridging conditions will ensure at least a few more days of below normal temperatures and low humidity. Nudged high temps today up just a bit over the NBM, and will continue to favor the cooler MAV/MET lows the next few nights with 50s likely across northwest AR.
Seasonal temperatures with highs in the low 90s, nighttime lows in the low/mid 70s. (previous) Light southwesterly flow continuing, with a similar convective set up expected this afternoon, as the Atlantic ridge remains south and east of the area and a mid level trough stays draped over the GOMEX.
A large area of high pressure was located over the Midwest and Great Lakes. As of 2 AM, temperatures across eastern Iowa and northwest Illinois ranged from the low 50s to near 60 F, and winds were either around 5 kts or completely calm. Nice August weather expected with highs in the lower 80s, comfortable humidity, and light winds.
938 AM EDT Wed Aug 19 2020 Cooler air will filter into the region today. High pressure will bring dry and cool conditions tonight and Thursday.
/issued 308 AM CDT Wed Aug 19 2020/ Strong, amplified upper level high pressure persists over the intermountain west with meridional northerly flow over the Great Plains.