Aikyam-Lab/Synoptic-Bench huggingface dataset:
a cold front will move through the area this morning bringing north winds gusting up to 35 mph. High temperatures are expected to reach the low to upper 70s. another cold front moves through with less wind.
CDG Chattanooga Airport, TN 75 53 73 47 66 / 0 0 0 0 0 Knoxville McGhee Tyson Airport, TN 71 54 71 47 63 / 0 0 0 0 0 Oak Ridge, TN 72 53 71 45 64 / 0 0 0 0 0 Tri Cities Airport, TN 67 51 68 43 61 / 0 0 10 0 0.
/issued 350 AM CDT Wed Sep 30 2020/ Beautiful weather will continue for the rest of the week as another reinforcing cold front is expected to move through the region tonight. Ahead of that front expect southwest winds that will allow temperatures to rise to around 80 degrees before we dip back into the low 70s on Thursday.
A cold front will swing through the region this morning turning our west wind to northwesterly and should result in most places being on average around 10 degrees cooler than yesterday. In addition, the wind will be more gusty as stronger winds mix down to the surface with strong mixing behind the cold front. We will be in a cool and dry pattern with northerly to northwesterly flow aloft reinforcing the cooler/dry air.
304 AM MDT Wed Sep 30 2020 Upper ridging will continue parked over the western U.
512 AM CDT Wed Sep 30 2020 A broad upper level trough will be over the eastern half of the country during the short term period, digging south to become centered from Hudson Bay to the Gulf of Mexico by Thursday evening. At the surface, the region will be situated between low pressure to the east and high pressure to the west today and tonight, with the high then sliding over the central part of the country on Thursday. The gradient slackens a bit tonight as the high approaches, but will see winds stay up in the 10 to 20 mph range tonight into the day Thursday. Though temperatures will be cooler today, the winds and dry conditions will still aid in creating high to very high fire danger this afternoon, mainly west of the Missouri River.
A cold front arrived overnight, resulting in cooler temperatures today. Strong surface pressure rises are noted this morning following a cold frontal passage across North-central Montana. Temperatures will trend cooler today, but then return near to just above seasonal averages for the rest of the period. The large scale pattern is under the control of a persistent large scale ridge over the Pacific coast, maintaining a dry northwesterly flow over Montana.
310 AM MDT Wed Sep 30 2020 A cold front arrived overnight, resulting in cooler temperatures today. Strong surface pressure rises are noted this morning following a cold frontal passage across North-central Montana. Temperatures will trend cooler today, but then return near to just above seasonal averages for the rest of the period. The large scale pattern is under the control of a persistent large scale ridge over the Pacific coast, maintaining a dry northwesterly flow over Montana.
Not a cloud in the sky early this morning as the well amplified and well advertised ridge of high pressure remains in control. More of the same expected for tonight and Thursday as the high remains stationary over the western states.
723 AM EDT Wed Sep 30 2020 Mainly dry weather and cooler than average temperatures will dominate the weather pattern across central Pennsylvania into the weekend.
Otherwise, Surface and upper-level ridging to maintain VFR conditions across area terminals through tonight. Winds to become light and northeast on Thursday as high pressure becomes reinforced behind a dry cold front across the region. Temperatures to range from highs in the low to mid 80s today to lows in the mid 50s overnight. High temperatures on Wednesday to climb into the mid 70s behind the front across the I-30 corridor to the lower 80s across deep east Texas and north Louisiana.
955 AM EDT Wed Sep 30 2020 Cold front is now to our south however cloud cover is still lingering in our southern counties. /issued 452 AM EDT Wed Sep 30 2020/ Amplified pattern aloft continues over CONUS with a strong ridge out west and a deep trough over the east extending down into our area. Surface cold front has pushed across much of the peninsula, currently located along a line roughly from just south of Melbourne to Fort Myers.
A broad upper level trough will be over the eastern half of the country during the short term period, digging south to become centered from Hudson Bay to the Gulf of Mexico by Thursday evening. At the surface, the region will be situated between low pressure to the east and high pressure to the west today and tonight, with the high then sliding over the central part of the country on Thursday. The gradient slackens a bit tonight as the high approaches, but will see winds stay up in the 10 to 20 mph range tonight into the day Thursday. Though temperatures will be cooler today, the winds and dry conditions will still aid in creating high to very high fire danger this afternoon, mainly west of the Missouri River.
248 AM PDT Wed Sep 30 2020 High pressure aloft will bring hot and very dry conditions through Thursday with the the heat extending almost to the coast today.
The upper level ridge centered over northern Mexico will nudge eastward across west Texas today. The combination of the upper ridge, abundant sunshine, and southwesterly winds will allow temperatures to climb into the upper 80s and lower 90s this afternoon.
615 AM EDT Wed Sep 30 2020 A cold front will race through the area today bringing rain showers and a period of breezy conditions. Rain showers early this morning developed on the leading edge of an 850-mb baroclinic zone embedded within a 500-mb trough axis. Rain showers are looking to become more widespread within a couple hours of sunrise as a cold front races in from the Northern Plains. The RAP suggests that the 850-mb wind field increases, rounding the trough axis. In the wake of this cold front, lake effect rain showers begin to take shape. Lake effect ramps up on Thursday as another trough rotates through. Most of the CWA has a shot to see some rain from this trough initially.
Further up, an upper level trough will deepen and transport a cold air mass from Canada into the northern Great Lakes region late Thursday. This will cause our high temperatures to be in the mid 40s and low temperatures reaching below freezing as we move into the weekend. Thursday night, all precipitation should push off to the east as the deep trough relaxes.
732 AM EDT Wed Sep 30 2020 Mainly dry weather and cooler than average temperatures will dominate the weather pattern across central Pennsylvania into the weekend.
/EC/ Today through tonight: Northwest flow associated with a highly amplified longwave trough over eastern North America is maintaining a dry and seasonable airmass over the ArkLaMiss region. Sunny skies and increased warm advection/mixing ahead of the next approaching cold front will allow temperatures to rebound a bit today, especially over the Delta region, and temperatures tonight will not be quite as cool.
916 AM EDT Wed Sep 30 2020 Mainly dry weather and cooler than average temperatures will dominate the weather pattern across central Pennsylvania into the weekend. Rapid clearing has in fact taken place the last few hours over the Lower Susq. Large scale subsidence will help the low clouds dissipate over the Alleghenies by late morning, with a good amount of sunshine expected there.
1050 AM EDT Wed Sep 30 2020 On the heels of a cold frontal passage, intensifying low pressure moves north from northern New England into Quebec. A weak cold front will approach later tonight and stall nearby Thursday into Thursday night.
30 Previous Discussion: /Through Thursday/ Slightly higher dewpoints and southwesterly winds should keep overnight temperatures a little warmer than yesterday. Meanwhile, North and Central Texas remains on the eastern edge of a mid/upper level ridge centered over the Desert Southwest. Areas immediately along the I-20 corridor will likely experience about a 6 to 8 degree drop compared to Wednesday, with Thursday highs in the lower 80s.
538 AM EDT Wed Sep 30 2020 Mainly dry weather and cooler than average temperatures will dominate the weather pattern across central Pennsylvania into the weekend. It will be breezy and cooler with highs a few to several degrees below average for the last day of September.
Light southeast to south breezes are expected through early afternoon, gradually backing north and northeast as a cold front approaches the Florida Keys.
1029 AM EDT Wed Sep 30 2020 Cooler air along with dry conditions will settle into the region for the next several days. Only a few minor adjustments to temps, running a bit warmer than forecast. Cooler, drier regime, below average max-T today and min-T tonight, but very close to climatology Thursday day. Very quiet weather conditions through the short term period as mid level troughing will dictate conditions across the Eastern U. Highs will be in the lower 70s or so with low temperatures dipping into the lower 50s with some upper 40s not out of the question. Maintained the low chance pops with this feature although the GFS has essentially backed off any precip while the ECMWF continues to show some. Cold front has pushed well offshore with skies lifting and scattering shortly after TAF issuance time.
556 AM EDT Wed Sep 30 2020 Cooler air along with dry conditions will settle into the region for the next several days. Cooler, drier regime, below average max-T today and min-T tonight, but very close to climatology Thursday day. Very quiet weather conditions through the short term period as mid level troughing will dictate conditions across the Eastern U. Highs will be in the lower 70s or so with low temperatures dipping into the lower 50s with some upper 40s not out of the question. Maintained the low chance pops with this feature although the GFS has essentially backed off any precip while the ECMWF continues to show some. Cold front has pushed well offshore with skies lifting and scattering shortly after TAF issuance time.
/issued 452 AM EDT Wed Sep 30 2020/ Amplified pattern aloft continues over CONUS with a strong ridge out west and a deep trough over the east extending down into our area. Surface cold front has pushed across much of the peninsula, currently located along a line roughly from just south of Melbourne to Fort Myers.
/issued 345 AM CDT Wed Sep 30 2020/ An anomalously strong 594 dam high is parked over the Desert Southwest whilst a deep and persistent upper trough continues to deliver precipitation and cool temps to the northeast CONUS. High temperatures will be 5-10 degrees warmer today with many locations in the Permian Basin hitting 90F due to the return of southerly sfc flow and 850 hpa temps around 23-24C. A weak cold front will slide into the region early Thursday which will help knock temps down a few degrees.
Forecast Summary: Gusty north to northwest winds today will usher in much cooler air which will remain in the area through the weekend.
/Issued 337 AM CDT Wed Sep 30 2020/ Temperatures will warm considerably today as a low level thermal ridge expands eastward into the region ahead of an approaching cold front. A cold front will move through the area later this afternoon and march southward into the evening. A large upper level ridge will remain planted over the western US while a deep trough will remain in place over the eastern US for the next several days.
High pressure will maintain a warm and dry airmass across the region through the upcoming weekend.
As expected we have sunny skies, light winds, and cooler drier conditions for today. After seeing morning lows mostly in the lower to mid 50s, highs will be in the mid to upper 70s.
806 AM EDT Wed Sep 30 2020 A cold front will pass east this morning while intensifying low pressure moves north from northern New England into Quebec. A weak cold front will approach later tonight and stall nearby Thursday into Thursday night.
High pressure aloft persists across the west coast with little change in the broad scale pattern expected. There will be some increase in winds at 850 and 925 MB in Mendocino and Lake counties which will bring some gusts to the higher ridges in the mornings.
Winds will decrease slowly through the day on Thursday as Canadian high pressure builds into the western High Plains.
A new cold front will drop SE into the state this evening. some SW winds were increasing in the higher elevations of the Ozarks. allowing for much warmer conditions across the state. A new cold front will drop SE into the CWA by late this afternoon across the far NWRN counties. Expect temps to be 10 to 15 deg cooler for Thu afternoon behind this front as NRLY winds usher in cooler. Expect lows to drop down into the low 40s to around 50 by Fri morning.
Quiet weather across the Tennessee Valley region early this morning as high pressure has built into the area. The end result will be a clear, sunny and pleasant day to close out the month of September, with highs in the low to mid 70s. An amplifying upper trough over the Great Lakes will force a secondary dry cold front into the Ohio and Tennessee Valleys on Thursday.
VFR conditions will continue for the next 24 hours with high pressure in control. /issued 340 AM CDT Wed Sep 30 2020/ SHORT TERM (Now through Thursday): Mostly clear skies and light winds prevail across deep south Texas early this morning with high pressure in control. Tranquil conditions will persist through the forecast period as mid level ridging overhead provides subsidence across the region. Low temperatures tonight will range from the upper 50s across the northern ranchlands to the low to mid 60s near the coast as the air mass begins to modify.
With the addition of high pressure at the surface and aloft, conditions will be dry with clear skies.
Northwest flow continues across the Plains this morning, situated between a large ridge over the western CONUS and a deep longwave trough over the eastern CONUS. Within the broad longwave trough, a strong and compact vorticity max is diving southeast through the Upper Midwest, with an associated surface front moving southward through Nebraska and Iowa. The cold front will move through the forecast area over the morning hours, with winds behind the front gradually veering to the north at 15-20 mph. This should allow highs to reach the low to mid 70s area- wide, despite the increasing afternoon CAA. The pattern will continue through tonight, with additional CAA ahead of the surface anticyclone as it continues to push into the Plains. Winds won't quite calm, but the clear skies should enable lows to drop into the low 40s for most.
457 AM MDT Wed Sep 30 2020 07z surface analysis showed cold front about to exit the CWA via NE/east central WY. Water vapour loop had upper ridge over the western CONUS, upper low north of the Great Lakes and fast northwest flow over the northern plains.
A strong and highly amplified 2+ height anomaly ridge with a 5 to 10 year return interval will remain stationary over the W coastal states into Old Mexico through the short-term forecast period. The "Omega Block" is locked in place over Wrn NOAM by 2 long wave trofs, one over the Ern third of NOAM, and the other near 150W. In addition, humidity recovery will remain poor to moderate over the higher terrain due to a strong subsidence inversion until the weekend. Weakening of the ridge on Sat will allow for onshore flow and cooler temps for interior Norcal.
852 AM MDT Wed Sep 30 2020 A cold front arrived overnight, resulting in cooler temperatures today. - Fogleman Strong surface pressure rises are noted this morning following a cold frontal passage across North-central Montana. Temperatures will trend cooler today, but then return near to just above seasonal averages for the rest of the period. The large scale pattern is under the control of a persistent large scale ridge over the Pacific coast, maintaining a dry northwesterly flow over Montana.
1024 AM EDT Wed Sep 30 2020 Very cool and dry conditions will be the rule through most of this week as an upper level trough digs into the northeast U.
428 AM MDT Wed Sep 30 2020 Not a cloud in the sky early this morning as the well amplified and well advertised ridge of high pressure remains in control. More of the same expected for tonight and Thursday as the high remains stationary over the western states.
428 AM CDT Wed Sep 30 2020 A cold front will swing through the region this morning turning our west wind to northwesterly and should result in most places being on average around 10 degrees cooler than yesterday. In addition, the wind will be more gusty as stronger winds mix down to the surface with strong mixing behind the cold front. We will be in a cool and dry pattern with northerly to northwesterly flow aloft reinforcing the cooler/dry air.
640 AM CDT Wed Sep 30 2020 (Today and tonight) A downslope-warmed air mass across the High Plains will advect in from the northwest today.
635 AM EDT Wed Sep 30 2020 Cooler air along with dry conditions will settle into the region for the next several days. Cooler, drier regime, below average max-T today and min-T tonight, but very close to climatology Thursday day. Very quiet weather conditions through the short term period as mid level troughing will dictate conditions across the Eastern U. Highs will be in the lower 70s or so with low temperatures dipping into the lower 50s with some upper 40s not out of the question. Maintained the low chance pops with this feature although the GFS has essentially backed off any precip while the ECMWF continues to show some. Cold front has pushed well offshore with skies lifting and scattering shortly after TAF issuance time.
A weak surface cold front will continue to slide slowly south past south-central and into south FL through the day. The cold front will linger across the southern peninsula, with a few showers possible for St Lucie and Martin counties and their adjacent coastal waters. Some normally cooler rural areas north/west of I-4 may realize U50s.
Aloft, a tight northwest flow pressure gradient was analyzed with cyclonic flow rotating around a low centered over the Hudson Bay region.
Dry conditions persist across the region as high pressure continues to build in this afternoon and evening. Light northerly/northwesterly surface winds will persist throughout the period before the approach of a dry cold front late Thursday from the northwest. Temperatures should top out in the upper 70's today before dipping down into the lower to middle 50's inland and middle to upper 50's nearer the coast tonight. Temps will rebound into the lower to possibly middle 80's by Thursday afternoon ahead of a reinforcing shot of cool air from the aforementioned cold front.
A back door cold front will produce a gusty east wind below canyons opening into Albuquerque and Santa Fe tonight through much of Thursday morning.
Deep mixing in this post cold frontal air mass is amplifying the drier and windier conditions we're seeing today. As the main upper level trof to the east deepens, another shot of cold air will be pulled down through the Central Plains tonight and into tomorrow. While lows will be cooler tonight, the potential for frost is weak since winds will likely stay above 5 mph. Predominantly NW flow aloft and the high pressure at the sfc will help to reinforce this surge of colder air and bring temps down by around 8-10 degrees tomorrow.
Cloud cover will continue to advance southeast out of Minnesota overnight, and a few lingering sprinkles could be possible along the Buffalo Ridge. Have raised temperatures slightly given the persistent mixing, but temperatures in most areas will fall into the lower 40s.
350 PM EDT Wed Sep 30 2020 Very cool and dry conditions will be the rule through most of this week as an upper level trough digs into the northeast U.
1043 AM MDT Wed Sep 30 2020 Forecast area lies under cyclonic NW flow between larger upper trof over eastern Canada/US amd sharp trof over western US. Cold air advection and cloud cover is keeping temperatures cooler, so have lowered max temperatures for today. 07z surface analysis showed cold front about to exit the CWA via NE/east central WY. Water vapour loop had upper ridge over the western CONUS, upper low north of the Great Lakes and fast northwest flow over the northern plains.
A cold front arrived overnight, resulting in cooler temperatures today. - Fogleman Strong surface pressure rises are noted this morning following a cold frontal passage across North-central Montana. Temperatures will trend cooler today, but then return near to just above seasonal averages for the rest of the period. The large scale pattern is under the control of a persistent large scale ridge over the Pacific coast, maintaining a dry northwesterly flow over Montana.
232 PM EDT Wed Sep 30 2020 A cold front enters the area late tonight into Thursday.
1126 AM MDT Wed Sep 30 2020 Forecast area lies under cyclonic NW flow between larger upper trof over eastern Canada/US and sharp trof over western US. Cold air advection and cloud cover is keeping temperatures cooler, so have lowered max temperatures for today. 07z surface analysis showed cold front about to exit the CWA via NE/east central WY. Water vapour loop had upper ridge over the western CONUS, upper low north of the Great Lakes and fast northwest flow over the northern plains.
SR Chattanooga Airport, TN 53 73 47 66 46 / 0 0 0 0 0 Knoxville McGhee Tyson Airport, TN 54 71 47 63 44 / 0 0 0 0 0 Oak Ridge, TN 53 71 45 64 44 / 0 0 0 0 0 Tri Cities Airport, TN 51 68 43 61 41 / 0 10 10 0 0.
Warm and dry conditions continue under the influence of the ridge across the Pacific Northwest. The axis of the ridge briefly moves east into the forecast area today, and is expected to wobble back westward on Thursday.
348 PM EDT Wed Sep 30 2020 Water vapor imagery depicts an upper-level trough encroaching on our Gulf waters.
A significantly cooler, drier air mass is in place today in the wake of a cold front, with highs this afternoon in the mid-upper 70s.
1128 AM MDT Wed Sep 30 2020 Not a cloud in the sky early this morning as the well amplified and well advertised ridge of high pressure remains in control. More of the same expected for tonight and Thursday as the high remains stationary over the western states.
/Issued 1016 AM CDT Wed Sep 30 2020/ Dry cold front expected to move through the forecast area this afternoon, however cooler air will lag some behind the boundary. Cooler conditions to ensue tomorrow and continue into the weekend.
314 PM CDT Wed Sep 30 2020 A cold front has moved through most of the area today, with drier and cooler air gradually moving in from the north. Tonight and Thursday will be cooler with lows in the 40s and highs in the 60s to around 70 (warmest south).
A much cooler and drier air mass moves in for tomorrow for much less shower activity, but there may be enough juice left in the atmosphere to spark a very isolated thunderstorm. Building high pressure to the west and low pressure to the east of Lake Superior is causing a pressure gradient that will stir up small craft advisory level winds across the waters today and tonight.
1240 PM CDT Wed Sep 30 2020 High pressure continues over the area with southwest winds over Arkansas. A cold front is just to the northwest of the state and will move through tonight without precipitation and only a slight increase in clouds. A new cold front will drop SE into the state this evening. some SW winds were increasing in the higher elevations of the Ozarks. allowing for much warmer conditions across the state. A new cold front will drop SE into the CWA by late this afternoon across the far NWRN counties. Expect temps to be 10 to 15 deg cooler for Thu afternoon behind this front as NRLY winds usher in cooler. Expect lows to drop down into the low 40s to around 50 by Fri morning.
/Tonight through Thursday Night/ An upper-level ridge to our south will continue to bring SE winds across E Texas into our area. This slightly moist SE flow will moderate low temperatures to the mid-50s, preceding the next cold front.
240 PM CDT Wed Sep 30 2020 A dry cold frontal passage will take place later this afternoon and early tonight.