Aikyam-Lab/Synoptic-Bench huggingface dataset:
While cooler conditions are expected tomorrow, we urge folks not to forget about fire precautions and safety tips. Just because conditions will be cooler tomorrow, it does not mean fires won't easily spread. Fire conditions will be critical on Monday as dry conditions behind the cold front, and gusty winds will allow any fires to easily spread. Weak cold front pushed thru the region earlier today and we are seeing gusty winds across our eastern cwa this afternoon. After midnight and by sunrise, we will see a sharp Canadian cold front (currently in Alberta) drop through eastern MT. This will bring gusty northerly winds and much cooler temps for Monday.
A sizzling Labor Day will be followed by cooler weather for the rest of the week. Generally, preferred the warmer side of guidance highs, mainly in the mid to upper 90s, hottest day since August 5 in most locations.
Upper air analysis revealed a high over interior Rockies with a weak ridge axis extending southeast over Lower Mississippi Valley to the north gulf.
1057 PM CDT Sun Sep 3 2017 The short term concern remains timing of incoming cold front and convective potential with it and the upper trough for Monday afternoon. Still looks like the cold front will be dropping close to a KRCX- KMSP-KMKT line around 06z. With the cold upper trough moving over the area Monday, scattered showers and isolated thunder look to be a good threat over much of the central and east, mainly in the afternoon.
902 PM CDT Sun Sep 3 2017 Quiet weather expected the remainder of the night, as high pressure slowly departs to the E-SE. Main concerns during this period are with Monday temperatures, and timing of thunderstorm activity with the cold front. Strengthening cold front currently over the Northern Plains will be moving into northern parts of the CWA by midday Monday. Main focus the remainder of the work week remains with the shift to a much cooler weather pattern, as a long wave trough digs southward across the Midwest and Mississippi Valley. This trough will be slow to exit, but the western ridge is expected to finally nudge it eastward toward the first part of the weekend.
/issued 553 PM CDT Sun Sep 3 2017/ 00Z TAF issuance A few storms have developed across the Lower Trans Pecos and Big Bend this afternoon. /issued 158 PM CDT Sun Sep 3 2017/ 12Z MAF sounding continues to show NE mid level flow is in place with flow dominated by an upper ridge to the NW and an upper low just SE of CWFA. For Tue, the cold front is on schedule to arrive INVOF I-20 corridor before 21Z.
A strong cold front will move through lower Michigan Monday afternoon and bring potential for thunderstorms mainly near to south of I-96 by mid to late afternoon. It will become much cooler behind that system for mid to late week. A cold front will move in from the nw across our fcst area on Labor Day.
542 PM MDT Sun Sep 3 2017 High pressure will remain firmly situated over the western CONUS over the next several days, keeping conditions generally dry and warm. Residual moisture trapped underneath the ridge will continue to be recycled each afternoon, resulting in isolated to scattered showers and thunderstorms over the higher terrain.
/issued 340 PM CDT Sun Sep 3 2017/ Wx map shows weak high pressure over the SE US through TX, giving light and variable winds. Across the upper levels, a significant trough will deepen across the Central and East U.
/ISSUED 328 PM CDT Sun Sep 3 2017/ Climatological conditions will continue for the next couple of days with highs in the low 90s everywhere but the coast and a weak sea breeze providing very isolated afternoon showers.
722 PM EDT Sun Sep 3 2017 Weak high pressure will keep us dry through Monday.
Strong upper high entrenched over the region with very warm and dry airmass over Colorado. A bit cooler on Monday in prefrontal airmass before main front poised to move into northeast Colorado Monday evening. Monday night the large upper level ridge of high pressure will stretch from the Pacific Northwest into the Desert Southwest. with an upper level trough of low pressure deepening across the central and eastern United States. A strong short wave on the back side of the upper trough will push a strong cold front across northeastern Colorado Monday night.
1120 PM CDT Sun Sep 3 2017 It's been a very warm early September afternoon with a good push of 1000-850 mb warm advection and southwesterly surface winds ahead of the cold front that will push through later tonight into early Monday. A few of the high-res models do try to pop a few higher based showers above the cap farther south. Following the frontal passage, a cooler and breezy day Labor Day is expected, although temps will still reach the 70s in most spots. Isolated to scattered diurnally driven showers should develop in the afternoon amidst steep lapse rates as upper level troughing deepens across the Midwest, especially north of I-90.
SW flow will continue into tomorrow with warmer afternoon temperatures into the upper 80s, and dewpoints approaching the 70 degree mark in some locations, especially in the northwestern part of the CWA.
1020 AM EDT Sun Sep 3 2017 High pressure will continue across the CWFA through today. /issued 412 AM EDT Sun Sep 3 2017/ A strong mid level trough continues to move through the Carolinas with drier air working into the area in its wake. Light WNW flow at the surface is also allowing cooler temps to filter into the area with mid 50s across the northern tier and lower 60s across the metro. On the back side of aforementioned trough, we are looking at very tranquil conditions through the short term period.
1040 AM EDT Sun Sep 3 2017 Aviation section updated This week high pressure systems and cold fronts will take turns controlling Indiana weather. High pressure should be with us into Labor Day, with the first cold front passing Monday night.
This jet energy is expected to tap into the cooler air mass and dive southeast into our forecast area on Monday. The warmest daytime temperatures will be across the south, but more reinforcement of the cooler air is expected to move into the area on Monday night which may try to squeeze some light showers mainly in our southern Nebraska panhandle. Quite amplified upper pattern in place through mid week with anomalous ridging over the western US and Canada and deep troughing over the Mississippi Valley and eastern US.
Weak mid level warm frontal structure seemingly lodged within the trailing cyclonic shear zone of this trough, providing just enough ascent to anchor a linear axis of higher RH within the 850 to 925 mb level. Pleasant conditions through the latter half of the day, as surface ridging then takes hold beneath weakly confluent northwest mid level flow. Warm air advection ramps up tonight within a strengthening low level southwest flow immediately downstream, the process eventually shifting a well-defined thermal ridge over the area on Monday. Convective potential late Monday into early Monday night with the cold frontal passage continues to carry considerable uncertainty with several limiting factors. Greater convective development may ultimately emerge within the trailing elevated cold frontal zone as the crashing upper heights spread over the top, affording a period of greater coverage but perhaps lacking in vigor.
Other than a few passing clouds from the northwest in association with a narrow ribbon of passing low-mid level moisture, expect a return to sunnier skies and warmer temperatures through the day. Models show a dying cold front moving in from the northwest today, and a stronger cold front approaching from the northwest on Monday. An upper level trough will begin taking shape across the upper Midwest to start the period.
Today Through Monday Night Some ridging will be noted over the southeast United States today into Monday. A large trough will begin digging across much of the country east of the Rockies. A northwest wind flow aloft will drive a cold front toward the region.
Moisture recycling around the high will result in isolated to scattered showers and thunderstorms each afternoon and evening as convection initially develops over the Mogollon Rim/White Mountains and then pushes to the southwest.
A broad area of high pressure continues to build into the Four Corners region keeping the stronger wind fields offset well north of the Panhandles per water vapor imagery.
Hourly temps were running cooler than forecast due to fog so made adjustments there but our high temps for the day won't be affected. Chattanooga Airport, TN 85 64 87 68 / 0 0 0 10 Knoxville McGhee Tyson Airport, TN 80 61 85 65 / 0 0 0 10 Oak Ridge, TN 82 62 85 65 / 0 0 10 10 Tri Cities Airport, TN 79 56 82 62 / 10 0 10 10.
/issued 407 AM CDT Sun Sep 3 2017/ Tranquil weather continued overnight with temperatures cooling into the upper 60s north to the low to mid 70s south. a northerly flow continues as high pressure continues over the area. perhaps just a tad cooler along the coastal interface of land and water.
812 AM EDT Sun Sep 3 2017 High pressure will build across the southeastern states today and Monday bringing dry air and near normal temperatures.
Clouds will increase tonight as an upper trough and weak surface cold front approach from the northwest. Any leftover showers in eastern Wisconsin early Monday will end quickly, with partly sunny and slightly cooler air arriving on northwest winds.
Moisture will begin to trend downward Monday but daily chances of terrain driven storms can be expected as low grade monsoon moisture remains trapped under a building ridge of high pressure.
1135 AM EDT Sun Sep 3 2017 Low pressure and associated frontal boundaries will move well northeast of the region today.
It does look as if we will pull in some slightly higher boundary layer moisture across our east with the passage of the weak cold front, and temps may be just a bit cooler than previously thought, but we will still see critical fire weather conditions. As we head into the evening, winds will begin to turn more northerly as a second and stronger front drops in from the north overnight bringing cooler temperatures for Monday (70s for most places), but gusty northerly winds as well.
629 AM CDT Sun Sep 3 2017 Hot temperatures will be in store for today and especially on Monday as southwest winds bring warmer low-level air into the region. Temperatures could approach triple digits for some locations on Monday as compressional warming/down slope effects occur ahead of approaching cold front.
919 AM MDT Sun Sep 3 2017 Upper ridge well entrenched over the region with dry northwest flow aloft over Colorado. Upper level ridge will remain parked over the western half of the country. Airmass will be about 4-8 degrees Fahrenheit warmer today with highs climbing into the mid to upper 90s today over northeast Colorado. By Monday the upper ridge will stretch from the Pacific NW into the four corners region with a strong upper trough over the Great Lakes. The trough will dive south into Colorado by late Monday bringing slightly increased RH values and a nice respite from the warm temperatures. Prior to that moisture will steadily increase allowing for some isolated convection over the higher terrain by the afternoon. Temperatures will continue to be warmer than average with highs reaching into the lower 90s across the region.
Once the fog lifts/burns off later this morning, expect sunny skies for the remainder of the day as broad high pressure at the surface drifts from the Central Plains into the Ohio River Valley. Being on the northern periphery of the high, a strengthening pressure gradient will result in increasing southwest wind through the day. In addition, 925 hPa temperatures increase to around +23 Celsius by 00Z tonight, allowing afternoon highs to rise into the lower to mid 80s for most areas. For tonight, a strong yet rather moisture starved cold front will sweep across the forecast area. Broad troughing associated with a large 500 hPa closed low over southern Hudson Bay will move over the Upper Midwest on Monday. Temperatures in the post frontal air mass will also be cooler, topping out in the lower to mid 70s.
Models show a dying cold front moving in from the northwest today, and a stronger cold front approaching from the northwest on Monday. An upper level trough will begin taking shape across the upper Midwest to start the period.
An area of low pressure, currently over southern Alberta, will slide southeastward across the region today. Winds will increase from the west, northwest during the mid afternoon behind the passage of a cold front.
100 PM EDT Sun Sep 3 2017 High pressure will build across the Carolinas through tonight, then drift offshore Monday. L/W trough exiting central NC this morning will veer the wind flow to a more west-nw direction. Afternoon highs should be in the low-mid 80s. The drier air arrival will be made evident as afternoon dewpoints should drop into the 50s across the Piedmont and the lower 60s over the coastal plain. Tonight, high pressure will settle overhead, maintaining a tranquil weather pattern. Warmer, with high temperatures in the middle to upper 80s, and lows, with light sswly stirring return flow, in the lower to middle 60s.
High pressure aloft will continue to strengthen across the Intermountain West through the first half of the week. This high pressure will generate very warm temperatures and dry conditions across most of the state. Strong high pressure remains over the forecast area this morning, resulting in mostly clear skies and unseasonably warm conditions. These near record temperatures will continue into Labor Day with high pressure firmly in place. This moisture will drift into far southwest Utah today, which will allow for some high-based showers and thunderstorms over the higher terrain of southern Utah and perhaps the adjacent southwest valleys as well.
The upper ridge bringing very hot conditions to central California is weakening and shifting eastward under the influence of weak low pressure spinning off the California coast while tropical system Lidia treks northwestward from northern Baja. The weakening ridge along with effects of increasing moisture will produce slightly lower temperatures today, though still hot enough to cause health risks to persons sensitive to heat. Temperatures will continue to trend downward on Labor Day as high pressure continues to weaken.
the marine layer and weak onshore flow will keep areas near the coastal cooler with higher humidities.
Expect the warming to continue to around forecasted highs, with many areas reaching into the lower 90s today. /issued 348 AM EDT Sun Sep 3 2017/ A weak boundary has continued to linger across the area, but is forecast to diminish today as high pressure builds to the east.
Otherwise temps are starting out warmer this morning and this will lead to a warmer day with highs around average in the middle 80s. Low temps tonight will also be warmer with readings in the upper 60s. A deep upper level trough will drop south out of the northern plains Monday into Monday night. This will send a cold front toward the area. Models have sped up the arrival of the cold front a little bit, generally during mid to late evening Monday night.
After fog burns off, the main story today will be the warmer temperatures. During this time, a deep Hudson Bay upper low will swing a trough into the northern U. This system's surface cold front will approach forecast area Monday night. Highs for Labor Day will be in the low to mid 80s.
mostly clear to partly cloudy skies and southerly winds should remain common as the ridge of high pressure over the Western CONUS expands eastward into the Plains. which will allow for warmer afternoon temperatures. The ridge of high pressure out west is forecast to amplify northward into Monday which will allow for low pressure to drop southeast into Eastern Ontario with a trailing longwave trof axis pushing southeast through the Central U.
The mid to upper level low over the Concho Valley will drift to the southwest into the Edwards Plateau today. The mid to upper level low will move southwest into Coahuila for Monday.
Mostly clear skies across the area except for mid to high clouds over the southeast zones ahead of mid to upper level trough. Trough was located based on water vapor imagery from Carolinas to the FL Big Bend and into the ern Gulf of Mexico. Weak frontal trough was diffuse near the FL/GA state line oriented roughly southwest to northeast.
1052 AM CDT Sun Sep 3 2017 Wx map shows weak high pressure over the SE US through TX, giving light and variable winds. /issued 407 AM CDT Sun Sep 3 2017/ Tranquil weather continued overnight with temperatures cooling into the upper 60s north to the low to mid 70s south. a northerly flow continues as high pressure continues over the area. perhaps just a tad cooler along the coastal interface of land and water.
522 AM MDT Sun Sep 3 2017 Current surface analysis shows low pressure over southwest SK, with cold front stretching westward across far southwest Canada. Upper level analysis shows high pressure still centered over the Great Basin region, with large scale trough over the Great Lakes region. Hot and dry weather can be expected today, ahead of the approaching cold front. Highs will be well above average, 90s to around 100 degrees, with upper 80s across the higher Black Hills. The dry cold front will begin to move into northwest SD by late afternoon and then move southeast across the rest of the forecast area tonight. Much cooler air will be in place for the first half of the week, with highs below average.
/Today through Tonight/ High pressure will slide southeast across the region today. Temps tonight will be much warmer than the last couple of nights since the front will pass through late and the coolest air will lag the front.
/Issued 319 AM CDT Sun Sep 3 2017/ A weak upper level low pressure system will remain over North Texas today. Otherwise, today will be partly to mostly sunny and hot with afternoon highs in the lower and middle 90s. Upper level high pressure will build southward out of the Central Rockies and the Great Basin tonight through Monday which will push the upper low into South Texas.
1016 AM EDT Sun Sep 3 2017 High pressure and drier today through Labor Day. Strong cold front midweek. Expect dry conditions with cooler temperatures through tonight. Weak high pressure builds from the south through tonight. Labor Day is looking like a great day with mostly sunny skies with weak high pressure overhead.
Otherwise high pressure aloft to remain over the Great basin for much of this week, and bring above normal max temperatures.
Strong cold frontal passage looks to occur in the morning, exiting SE by early afternoon. Saturation in soundings is limited outside of the low level forcing, thus thinking is this may be mostly ACCAS with some sprinkles possible. N/NW cwa will be cooler and mainly in the mid to upper 70s due to longer residence of NW winds and cold advection. Dry and much cooler conditions are on tap for Monday night in post-frontal northerly flow.
1040 AM EDT Sun Sep 3 2017 High pressure will build across the Carolinas through tonight, then drift offshore Monday. L/W trough exiting central NC this morning will veer the wind flow to a more west-nw direction. Afternoon highs should be in the low-mid 80s. The drier air arrival will be made evident as afternoon dewpoints should drop into the 50s across the Piedmont and the lower 60s over the coastal plain. Tonight, high pressure will settle overhead, maintaining a tranquil weather pattern. Warmer, with high temperatures in the middle to upper 80s, and lows, with light sswly stirring return flow, in the lower to middle 60s.
Highs are expected to reach the low ot mid 80s, except upper 70s Plateau. It will be a little warmer than today, and increasing southwest winds will start to bring humidity levels up slightly as well.
Still thinking low to mid 90s in the warm sector just ahead of the cold front at peak heating. Main feature for the first part of the week will be strong winds and cooler temps in the wake of fropa Monday. Clouds will limit mixing some but still very strong NW winds, sustained 20 to 30 mph, with much cooler air pushing into the area with tightening pressure gradient from approaching Canadian high pressure and low pressure system near Hudson Bay. 925mb will be 10C cooler than Sunday with highs in the 60s east with thicker cloud cover to low 70s valley and west.
/issued 203 AM CDT Sun Sep 3 2017/ An upper level low pressure system across central Texas will weaken and head south-southwest toward the Rio Grande River through tonight. This upper low will interact with a surface boundary to produce diurnal isolated to widely scattered thunderstorms from the southeast Permian Basin south and southwest toward the Lower Trans Pecos and Big Bend regions this afternoon and this evening.
A broad upper trough remains stationary over the eastern Conus through the first two periods of the forecast.
Some of these storms are still moving west over the waters south of Dry Tortugas and stratiform rain to the northwest of the Lower Keys. Satellite imagery trends indicate that as a trough to our north lifts northeast, its related moisture will move northeast with it. The forecast was kept with isolated coverage of showers and thunderstorms for the island chain through the rest of the afternoon and scattered to the waters north, south, and west of the Lower Keys as earlier activity continues to diminish.
Water vapor imagery early this morning shows our section of the country under the influence of a northwest flow thanks to the western ridge and eastern trough currently in place. The expanding ridge will allow winds to kick around to the south today, and southwest by Monday, resulting gusty southwest winds ahead of a cold front forecast to sweep south Monday night.
Eastern periphery of strong expansive upper ridge over the Great Basin will control Sunday's weather, supplying strong subsidence and a sunny, hot and dry afternoon. Still expecting prefrontal thermal ridge to send temperatures soaring into the upper 90s to near 102 Monday afternoon, with the hottest readings SE of Dodge City. The initial prefrontal trough/wind shift arrives during Monday afternoon, but with no cold air advection until evening, still expecting lower 90s along I-70.
Near record high temperatures today and Labor Day under strong high pressure aloft. High pressure continues, with warm and dry conditions. Smoke and haze from fires across the Pacific Northwest and California will continue to impact the area under the influence of this strong ridge.
/issued 348 AM EDT Sun Sep 3 2017/ A weak boundary has continued to linger across the area, but is forecast to diminish today as high pressure builds to the east.
A ridging west and troughing east pattern continued across the greater North American domain and CONUS. This area was under a NW flow, as the upper troughing over the east weakens somewhat. Weak high pressure otherwise controlled the general weather situation across the Tennessee Valley. Highs should warm a category higher than yesterday's, rising into the low/mid 80s. For tonight, not as cool with lows in the lower 60s. Labor Day Monday will feature mostly sunny skies with highs warming a little more, into the mid 80s with a few upper 80s in those warmer spots. A series of upper level systems moving across the Alaska panhandle will continue eastward, and help re-amplify the eastern trough during Mon/Tue. This will help drive a moderately strong cold front southward towards the Tennessee Valley, returning chances of showers and thunderstorms.
1053 AM EDT Sun Sep 3 2017 High pressure will build in today bringing dry weather and warmer temperatures.
/issued 412 AM EDT Sun Sep 3 2017/ A strong mid level trough continues to move through the Carolinas with drier air working into the area in its wake. Light WNW flow at the surface is also allowing cooler temps to filter into the area with mid 50s across the northern tier and lower 60s across the metro. On the back side of aforementioned trough, we are looking at very tranquil conditions through the short term period.