Aikyam-Lab/Synoptic-Bench huggingface dataset:
At the surface, low pressure over northwest Ontario was dragging a weak trough into northwest MN while a cold front lagged over southern Manitoba. Brisek southwest flow prevailed across Upper Michigan betwen the low and high pressure over the Ohio Valley. Tonight, expect the trough to move through and cold front to move through Upper Michigan tonight with winds veering westerly. Temps should range from the low to mid 60s south to the mid 50s north, with some onshore cooling from Lake Superior.
133 PM EST Wed Nov 4 2020 Dry weather continues as high pressure settles in for the rest of the week and through the weekend, with a gradual warming trend. A little cooler than forecast currently warranted tweaking down numbers tonight, especially in the typical colder locales. High pressure will dominate for the short term period leading to dry weather for the area.
Surface ridging will continue to bring clear skies to the region with temperatures expected to warm into the mid to upper 60s by this afternoon. Aside for brief IFR visb/cigs at CHA, VFR conditions through the period as high pressure prevails. CDG Chattanooga Airport, TN 68 43 68 48 71 / 0 0 0 0 0 Knoxville McGhee Tyson Airport, TN 67 42 66 45 69 / 0 0 0 0 0 Oak Ridge, TN 66 42 66 45 69 / 0 0 0 0 0 Tri Cities Airport, TN 68 39 66 42 70 / 0 0 0 0 0.
Latest near term model guidance suggests that NW flow aloft will gradually become light/variable over the course of the afternoon, as a mid-level ridge axis expands northeastward into the region from a subtropical high centered across South TX and adjacent portions of northeastern Mexico. Based on recent trends in surface observations, we have increased the high temperature forecast by a degree or so, with maxes expected to range from the upper 60s in elevated terrain to the lower 70s in valley locations. As a result, we can expect even milder temperatures tonight and a slightly cooler day tomorrow.
Surface ridging will continue to bring clear skies to the region with temperatures expected to warm into the mid to upper 60s by this afternoon. Ridge of high pressure at the surface will continue to bring VFR conditions through the next 24 hours. Diegan Chattanooga Airport, TN 68 43 68 48 71 / 0 0 0 0 0 Knoxville McGhee Tyson Airport, TN 67 42 66 45 69 / 0 0 0 0 0 Oak Ridge, TN 66 42 66 45 69 / 0 0 0 0 0 Tri Cities Airport, TN 68 39 66 42 70 / 0 0 0 0 0.
1038 AM MST Wed Nov 4 2020 A weak upper-level low pressure center will continue to deamplify and shift east of the divide this Wednesday morning. High pressure will build over the southern Rockies overnight and into Thursday.
Upper level ridging extending from the western Gulf of Mexico through LA/MS/western AL should persist into tonight before gradually shifting eastward and weakening on Thursday as an upper level trough over the central and southern Plains shifts southeastward toward the ArkLaTex region and eastern portions of TX. A deeply dry airmass will remain in place across the north central Gulf Coast region under the influence of ridging aloft tonight, and we expect mostly clear skies and dry conditions to persist through the overnight hours. Another chilly night is anticipated tonight with lows in the mid to upper 40s inland and in the lower to mid 50s near the immediate coast.
As the radiative inversion mixes out, winds will gradually become breezy once again by the afternoon hours, veering to the northeast as a surface anticyclone builds into the region. Winds will diminish after dark upon the cessation of vertical mixing, with slightly cooler temperatures expected tomorrow night.
236 PM CST Wed Nov 4 2020 (Issued 235 PM CST Wed Nov 4 2020) Tonight through Thursday night: Tonight, a 500mb trough is expected to move eastward over the southern plains and into the Middle Mississippi River Valley. Then high pressure will allow us to clear out again during the late morning and into the afternoon. It'll still be warm, with highs in the upper 60s, but we could be a few degrees cooler tomorrow than today.
215 PM EST Wed Nov 4 2020 High pressure will remain over the southeastern United States through the end of the week, resulting in dry weather and mostly sunny skies. High pressure currently sits off the New England coast, with ridging extending southwest all the way back into Texas. The high will move little tonight, keeping clear skies and light winds in the forecast. Lows will be about 3-5 degrees warmer than last night. While there will be little change in the coverage of high pressure, a weak coastal trough will develop by Thursday morning.
Temperatures a tad cooler today as 700mb temperatures have fallen into +6C over the +8/+9C temperatures we experienced yesterday. later shifts may want to go a little higher as we get those warmer 700mb temperatures.
317 PM EST Wed Nov 4 2020 High pressure will wobble from the Mid-Atlantic to the Ohio Valley region into the weekend. High pressure over the Mid Atlantic region and Low pressure over southern Manitoba will keep a tighter pressure gradient across the region into tonight. The extra cloud cover tonight and winds remaining in the 5 to 12 mph range will keep the region slightly warmer overnight. Lows should range from the lower/mid 40's to around 50. High pressure is expected to wobble from the Mid-Atlantic to the Ohio River Valley region into the weekend. Since low pressure is moving into Quebec and the high moves slightly closer it will allow the pressure gradient to decrease.
316 PM EST Wed Nov 4 2020 High pressure will stretch from the Northeast U. Look for a chilly start to the day with temperatures ranging from the upper 20s throughout parts of the Susq Valley to the low 40s on the higher terrain of western PA (where a light southerly breeze occurred through the overnight). Low dewpoints mainly in the 20s has inhibited the formation of river valley fog, but the calmer and cooler portions of the Lower Susq are most likely to see patchy valley fog for an hour or two either side of daybreak. Min temps will be 5-10F warmer early Thursday throughout the Central and Eastern Valleys, while similar low temps to this Wed morning will be found across the NW Mtns and Laurel Highlands. Perhaps a few deg F warmer in some spots though.
Unseasonably amplified upper ridging progressing east over the central and eastern CONUS will support continued above normal temperatures through the period.
245 PM CST Wed Nov 4 2020 Zonal flow and upper level ridging dominate the weather pattern through the end of the week. This perturbation in the jet stream forms a small blocking pattern over the Mississippi Valley which slows the progression of the larger pattern change. A substantial trough deepens across the Pacific NW during the weekend. This upper level trough is expected to slowly migrate toward the Rocky Mountains. The high puts up a strong defense against the advancing trough enhancing the gradient between the two air masses.
356 PM EST Wed Nov 4 2020 High pressure building up the east coast will provide dry weather through the weekend. High pressure ridging from the deep south up the east coast will continue to dominate local conditions through the evening and into the overnight. The high clouds will hold high temperatures a few degrees below todays values.
1230 PM EST Wed Nov 4 2020 Dry weather continues as high pressure settles in for the rest of the week and through the weekend, with a gradual warming trend. A little cooler than forecast currently warranted tweaking down numbers tonight, especially in the typical colder locales. A high pressure system will bring dry weather and moderating temperatures through the weekend.
Tonight should remain fairly quiet with only some very weak cold air advection on the backside of the departing trough. The slightly cooler airmass will keep highs in the 50s in northwestern MN with 60s from the RRV westward, only a few degrees cooler than today.
1256 PM EST Wed Nov 4 2020 High pressure, both at the surface and aloft, will remain anchored across the Mid-Atlantic for the next several days. Big bubble, no trouble: high pressure remains situated over the region today and lasts through the weekend. Tonight, increasing dewpoints and the persistent high should work together to bring slightly warmer conditions, taking any risk of frost out of the east. An upper level ridge is expected to develop over our region, all while a trough deepens across the Four Corners region.
Winds will be light, except for gusty winds this afternoon in the higher elevations.
1239 PM EST Wed Nov 4 2020 High pressure will provide dry weather and above-normal temperatures into the weekend.
This feature has helped to kept skies clear, but some higher level cirrus is expected to move into the CWA this evening ahead of a 500h trough. Tomorrow, the trough will advance east from the Plains towards the Ohio Valley. This keeps the cirrus over the Lower Ohio Valley during the day until the trough passes, and clear skies return early tomorrow night. Aloft, upper level low over Texas will retrograde to the west and a large positive height anomaly will develop over the eastern US.
(This evening through Thursday) A minor short wave trough will skirt across the area overnight, followed by rising heights tomorrow, as short wave ridging builds in from the west.
/issued 357 AM CST Wed Nov 4 2020/ Current wv imagery shows a subtle shrtwv trof passing thru N AZ. As it does so, a sfc trof will set up across the TX/NM line causing sfc winds to shift out of the WSW. The shrtwv trof will then track into E TX early Thursday morning and drag a weak front into the area. The front will do little to cool temperatures however, as high pressure aloft quickly builds over the region. In fact, highs tomorrow will be very similar to today's in the low to mid 80s.
The flow will become more zonal with some weak ridging trying to build into the area toward the end of the week. Upper level ridging will continue building through the weekend as moisture begins returning to the region. High pressure is still ridging into the region, and with plentiful dry air, sunshine is dominating. Surface winds are beginning to shift out of the east and northeast, but don't look to offer much in the way of temperature advections in the lower levels of the atmosphere. I have lows tonight lower than most guidance had it, in the low and mid 40s. High pressure aloft builds over The Midlands and CSRA for the rest of this week for a warming trend which leads to above normal temperatures.
We will see temperatures retreat back a few degrees on Thursday, however, as the tail of a weak trough passes and results in less favorable wind flow/mixing for as significant warming. While no precipitation is expected, passing high clouds are expected to accompany the trough passage. The trend for well-above normal high temperatures continues through the weekend as upper-level ridging overspreads the eastern half of the CONUS.
144 PM MST Wed Nov 4 2020 Current surface map places trof through the eastern Dakotas, with breezy northwest winds across the western South Dakota plains.
Temperatures this afternoon are nearing record territory once again with numerous sites into the low to mid 70s.
This will result in mostly light wind speeds (by Panhandle standards) today, but areas ahead and behind the trough axis could produce slightly strong winds around 10-15 mph with gusts around 20 mph today.
152 PM EST Wed Nov 4 2020 Dry weather continues as high pressure settles in for the rest of the week and through the weekend, with a gradual warming trend. Very quiet weather continues with high pressure in control. Dry airmass and clear skies tonight will promote good radiational cooling conditions with temperatures in the valleys falling fast and hard and ending up deep into the 30s, with upper 20s in the coldest mountain valleys, while ridgetop locations remain near 40. High pressure will dominate for the short term period leading to dry weather for the area.
1127 AM CST Wed Nov 4 2020 An upper trough will move through British Columbia and Alberta Canada and into the Pacific Northwest through Thursday.
344 PM EST Wed Nov 4 2020 High pressure over the northeast will bring mostly clear skies and mild temperatures to the region through the weekend. High pressure will bring fair weather to NY and PA over the next few days, while southwesterly flow will tap abnormally mild air building through the continental U. Temperatures will fall into the lower 40s. Ridging is expected to strengthen over the region for the end of the workweek.
A weak trough of low pressure will continue to move through the CWA this evening shifting winds from a southerly direction ahead and a northerly direction behind this feature. As for temperatures, lows tonight are progged to dip into the low to mid 40s with highs tomorrow reaching into the mid to upper 70s.
/Tonight through Thursday Night/ Favorable weather remains across the Four-States for this short- term forecast, as a weak low-pressure spins off the southeast Texas coast. This low-pressure has turned transport winds to a more south direction, allowing for a warmer airmass to work its way back into the area. While temperatures for this short-term will be warmer, due to us being cooler the last several days, expect temperature to actually be seasonally normal for this time of the year.
Zonal flow across the state today starts to buckle as large-scale trough drop down the West Coast, and ridging builds along the Mississippi Valley.
High pressure will wobble from the Mid-Atlantic to the Ohio Valley region into the weekend. High pressure over the Mid Atlantic region and Low pressure over southern Manitoba will keep a tighter pressure gradient across the region into tonight. The extra cloud cover tonight and winds remaining in the 5 to 12 mph range will keep the region slightly warmer overnight. Lows should range from the lower/mid 40's to around 50. High pressure is expected to wobble from the Mid-Atlantic to the Ohio River Valley region into the weekend. Since low pressure is moving into Quebec and the high moves slightly closer it will allow the pressure gradient to decrease.
603 PM CST Wed Nov 4 2020 Zonal flow and upper level ridging dominate the weather pattern through the end of the week. This perturbation in the jet stream forms a small blocking pattern over the Mississippi Valley which slows the progression of the larger pattern change. A substantial trough deepens across the Pacific NW during the weekend. This upper level trough is expected to slowly migrate toward the Rocky Mountains. The high puts up a strong defense against the advancing trough enhancing the gradient between the two air masses.
Temps trend a little warmer along the foothills/urban corridor. As ridge sharpens ridge top flow turns more northerly, but enough of a downslope component to keep that area a few degrees higher. On Thursday the ridge sharpens with its axis over CO/NM in response to digging northwest coastal trough. 700 mb temperatures warm a degree or two above today's as heights rise, however model soundings show we will not mix to that level as it caps off a weak subsidence inversion under the ridge. Upper level ridge will slowly be moving east Thursday night into the early portions of the weekend.
High pressure will remain to the northeast this period, continuing the onshore flow. An inverted trough is expected to develop in the coastal waters this afternoon, which will provide convergence for a few showers over eastern zones this afternoon through Thursday.
Flat ridging/zonal flow will maintain dry weather and seasonably warm temperature tonight.
406 PM MST Wed Nov 4 2020 Current surface map places trof through the eastern Dakotas, with breezy northwest winds across the western South Dakota plains.
Forecast H85 temps on Thursday afternoon are running 1 to 2 degrees cooler in comparison to this afternoon. Winds will remain light overnight and lows will reach the lower 40s with some mid 30s in the Platte River Valley.
416 PM MST Wed Nov 4 2020 Mild temperatures and mostly sunny skies will continue rest of today with a few cumulus over the high terrain in northwest flow. These clouds should dissipate overnight as the ridge of high pressure slides overhead by Thursday. This equates to near 70 for Grand Junction and low 70s for the lower desert valleys of southeast Utah. The ridge of high pressure is fairly progressive as a strong low pressure trough dives into the Pacific Northwest, allowing some high level moisture to get pulled northward over the Baja and Desert Southwest Thursday evening.
Zonal flow aloft will be followed by a building upper level ridge for Thursday and Thursday night over the region. The warmer than normal conditions will continue into Thursday night with mostly clear skies with lows in the 40s with south winds of 10 to 20 mph.
333 PM MST Wed Nov 4 2020 Mild temperatures and mostly sunny skies will continue rest of today with a few cumulus over the high terrain in northwest flow. These clouds should dissipate overnight as the ridge of high pressure slides overhead by Thursday. This equates to near 70 for Grand Junction and low 70s for the lower desert valleys of southeast Utah. The ridge of high pressure is fairly progressive as a strong low pressure trough dives into the Pacific Northwest, allowing some high level moisture to get pulled northward over the Baja and Desert Southwest Thursday evening.
550 PM EST Wed Nov 4 2020 Dry weather continues as high pressure settles in for the rest of the week and through the weekend, with a gradual warming trend. Very quiet weather continues with high pressure in control. Dry airmass and clear skies tonight will promote good radiational cooling conditions with temperatures in the valleys falling fast and hard and ending up deep into the 30s, with upper 20s in the coldest mountain valleys, while ridgetop locations remain near 40. High pressure will dominate for the short term period leading to dry weather for the area.
The flow will become more zonal with some weak ridging trying to build into the area toward the end of the week. Upper level ridging will continue building through the weekend as moisture begins returning to the region. Overnight the clear skies and light winds will allow for optimal radiational cooling however with moisture continuing to slowly increase expect overnight lows a few degrees warmer. High pressure aloft builds over The Midlands and CSRA for the rest of this week for a warming trend which leads to above normal temperatures.
821 PM EST Wed Nov 4 2020 Another quiet night is expected as we remain under the influence of high pressure. These clouds are associated with an approaching upper level trough to our west. This feature has helped to kept skies clear, but some higher level cirrus is expected to move into the CWA this evening ahead of a 500h trough. Tomorrow, the trough will advance east from the Plains towards the Ohio Valley. This keeps the cirrus over the Lower Ohio Valley during the day until the trough passes, and clear skies return early tomorrow night. Aloft, upper level low over Texas will retrograde to the west and a large positive height anomaly will develop over the eastern US.
905 PM EST Wed Nov 4 2020 High pressure will wobble from the Mid-Atlantic to the Ohio Valley region into the weekend. High pressure over the Mid Atlantic region and Low pressure over southern Manitoba will keep a tighter pressure gradient across the region into tonight. The extra cloud cover tonight and winds remaining in the 5 to 12 mph range will keep the region slightly warmer overnight. Lows should range from the lower/mid 40's to around 50. High pressure is expected to wobble from the Mid-Atlantic to the Ohio River Valley region into the weekend. Since low pressure is moving into Quebec and the high moves slightly closer it will allow the pressure gradient to decrease.
613 PM EST Wed Nov 4 2020 High pressure over the northeast will bring mostly clear skies and mild temperatures to the region through the weekend. High pressure will bring fair weather to NY and PA over the next few days, while southwesterly flow will tap abnormally mild air building through the continental U. Temperatures will fall into the lower 40s. Ridging is expected to strengthen over the region for the end of the workweek.
This dry weather pattern is thanks to a ridge of high pressure over the southeastern United States.
629 PM EST Wed Nov 4 2020 High pressure building up the east coast will provide dry weather through the weekend. High pressure ridging from the deep south up the east coast will continue to dominate local conditions through the evening and into the overnight. The high clouds will hold high temperatures a few degrees below todays values.
641 PM EST Wed Nov 4 2020 Dry weather continues as high pressure settles in for the rest of the week and through the weekend, with a gradual warming trend. Very quiet weather continues with high pressure in control. Dry airmass and clear skies tonight will promote good radiational cooling conditions with temperatures in the valleys falling fast and hard and ending up deep into the 30s, with upper 20s in the coldest mountain valleys, while ridgetop locations remain near 40. High pressure will dominate for the short term period leading to dry weather for the area.
638 PM EST Wed Nov 4 2020 High pressure will stretch from the Northeast U. Clear skies and a building high pressure area have brought lowering dewpoints and highs racing into the 60s today across central PA.
A lee trough remains through portions of the northern Plains into the TX panhandle region and some downslope flow over into western portions of KS and NE. Weak southerly flow ahead of the lee trough along with shallow mixing is helping to result in temperatures into the 70s across the area - kept in check overall with cloud cover - with mid to upper 70s over north central area where less overall cloud coverage is in place. A quiet pattern continues into the weekend with a sharp narrow mid level ridge building over the area and quickly flattening as as it gets pushed east with a broad trough digging into the western CONUS.
645 PM EST Wed Nov 4 2020 High pressure, both at the surface and aloft, will remain anchored across the Mid-Atlantic for the next several days. This has introduced the possibility of some patchy frost east of the Blue Ridge, but do not expect it will be widespread so a frost advisory does not appear warranted. Big bubble, no trouble: high pressure remains situated over the region today and lasts through the weekend.
938 PM EST Wed Nov 4 2020 High pressure building up the east coast will provide dry weather through the weekend. Could see temps stay in the lower 50s in west-central Ohio where there will be slightly thicker cloud cover and a bit more wind (but still light) through the overnight period. The high clouds will hold high temperatures a few degrees below todays values.
529 PM CST Wed Nov 4 2020 (This evening through Thursday) A minor short wave trough will skirt across the area overnight, followed by rising heights tomorrow, as short wave ridging builds in from the west.
429 PM EST Wed Nov 4 2020 High pressure will stretch from the Northeast U. Clear skies and a building high pressure area have brought lowering dewpoints and highs racing into the 60s today across central PA.
702 PM EST Wed Nov 4 2020 High pressure will stretch from the Northeast U. Clear skies and light winds will prevail overnight under influence of strong high pressure.
846 PM CST Wed Nov 4 2020 (Issued 845 PM CST Wed Nov 4 2020) Increasing area of high clouds associated with weak mid-level low pressure trof and high level warm air advection will continue to spread northeast across southern WI overnight into Thursday morning. Kavinsky (Issued 235 PM CST Wed Nov 4 2020) Tonight through Thursday night: Tonight, a 500mb trough is expected to move eastward over the southern plains and into the Middle Mississippi River Valley. Then high pressure will allow us to clear out again during the late morning and into the afternoon. It'll still be warm, with highs in the upper 60s, but we could be a few degrees cooler tomorrow than today.