Aikyam-Lab/Synoptic-Bench huggingface dataset:
Due to prime downward mixing potential that follows behind cold fronts this time of year breezy, occasionally gusty conditions are expected today. The high pressure that is sitting off to our northwest will continue to build in over the next day or so, and is expected to settle over central Mississippi sometime tomorrow, which should curtail any breezier conditions. /OAJ/ Today through tonight: A dry cold front has just about pushed through the forecast area early this morning, and this is being followed by another round of cold and dry polar air. Temperatures will be significantly below climate normals with readings struggling to climb out of the 40s over much of the area, and lows tonight should dip below freezing.
/SEC (Today through Wednesday) 500mb analysis shows a broad longwave trough just off the east coast. The boundary should continue pushing southward as strong high pressure builds in from the NW.
1129 AM CST Tue Dec 3 2024 - Much warmer today, with highs in the upper 30s to lower 40s. - A cold front Wednesday morning will bring in 30-40 mph gusts area-wide, cooling temperatures, and the possibility of flurries or sprinkles in northeast Nebraska (10% chance).
253 PM CST Tue Dec 3 2024 - Near and southeast of the I-70 corridor, there is a 20% chance for patchy freezing drizzle late tonight, which could effect the Wednesday morning commute.
- Warmer temperatures Wednesday ahead of the next cold front.
Dry and cold tonight, still dry but warmer for Wednesday. Winds will be increasing Wednesday afternoon, with some wind gusts to near 40 mph possible over the higher E TN mountains late Wednesday. A low pressure system will be moving through the northern Great Lakes Region on Wednesday with a cold front diving southeast into the Ohio Valley by late Wednesday. It will be warmer than recent days, but highs will still be around 5 to 10 degrees below normal.
/10 (Now through Wednesday) We start the near term under a deep layer, dry northwesterly flow with broad upper trough axis positioned from the northeast CONUS, down into the southeast. At the surface, a strong 1038mb ridge of high pressure was centered over the mid MS River Valley and will ease eastward to across the Appalachians tonight. The high sinks southward across the Florida Peninsula Wednesday where it weakens and flattens as next upstream front approaches the lower MS River Valley. Daytime highs begin to moderate Wednesday mostly into the lower to mid 60s.
(Tonight) Another cold night is ahead with a good radiational cooling conditions available as high pressure drifts southeast into Georgia.
Winds will turn more northeast to east beginning mid- week and decrease to gentle to moderate speeds as high pressure settles into the southeast United States, and eventually southward over the Florida Peninsula.
(This afternoon through Wednesday) High pressure will build over the region today, with a weak pressure gradient and winds expected to be light today. High pressure will move east Wednesday with mid and low level winds transitioning to out of the southwest, bringing warm and moist air to the state. High temperatures on Wednesday will be several degrees warmer, closer to normal with lower 50s in the north and upper 50s in the south.
1221 PM EST Tue Dec 3 2024 High pressure shifts south of the Ohio Valley overnight before low pressure takes over for the end of the week. Wednesday will feature a brief warm up followed by a strong cold front Wednesday night with the chance for snow showers.
301 PM EST Tue Dec 3 2024 High pressure will prevail through mid week.
127 PM MST Tue Dec 3 2024 -Highly variable temperatures through the period as a frontal boundary wavers over the region -Mainly dry in the period with chances for light snow and flurries with any passing system, best chances over northwest SD Frontal boundary will continue to waver over the region through the period as a series of impulses ride SE along the frontside of the mean western NOAM ridge. Strong impulse is diving SE across eastern MT and will bring a cold front in the region tonight.
Another night of freezing temperatures for the northern counties, with everyone else in the upper 30s to low 40s.
Due to prime downward mixing potential that follows behind cold fronts this time of year breezy, occasionally gusty conditions are expected today. The high pressure that is sitting off to our northwest will continue to dominate over the next day or so which will curtail any chance for breezier winds tomorrow. /OAJ/ Today through tonight: A dry cold front has just about pushed through the forecast area early this morning, and this is being followed by another round of cold and dry polar air. Temperatures will be significantly below climate normals with readings struggling to climb out of the 40s over much of the area, and lows tonight should dip below freezing.
We are in the middle of another beautiful day across the Florida Keys, and we can thank the combination of cooler temperatures and drier air for that. These conditions will continue as high pressure builds in and encompasses the southeastern U. The next cold front is expected to sweep down the peninsula some time near the end of the week, but there is still some uncertainty as to whether or not it will be able to keep itself together on its journey to the Keys. However, there is still a chance that the cold front makes it here in one piece. Winds will turn more northeast to east beginning midweek and slacken to gentle to moderate speeds as high pressure settles into the southeast United States, and eventually southward over the Florida Peninsula.
230 PM EST Tue Dec 3 2024 Arctic high pressure will build east into the Southeast US through tonight.
Overnight low temperatures will consequently range considerably, from the middle 40s south and west to near freezing again north and east, where temperatures will still have most of the night to plummet before cloud cover arrives. Guidance is split considerably on high temperatures Wednesday, ranging from the lower 50s to lower 60s.
A potent arctic cold front will sweep through the northern plains tonight and bring widespread blowing snow impacts to eastern North Dakota and northwest Minnesota.
248 PM CST Tue Dec 3 2024 Forecast discussion for routine afternoon forecast issuance - Periods of light snow/snow showers expected through Wednesday night with the highest risk of accumulations (50-90% chance of at least 2") across far northern Wisconsin.
227 PM EST Tue Dec 3 2024 Arctic high pressure will produce well below normal temperatures into midweek.
Temperatures trend warmer into the weekend. This return to near-normal temperatures will be brief however, as an Arctic cold front is set to invade the region overnight through tomorrow morning. Gusty northwest winds quickly develop behind the frontal passage, with the pressure gradient continuing to tighten through the day as the area becomes sandwiched between a deepening low pressure over the Great Lakes & an area of strong high pressure advancing out of the Canadian prairies. The winds remain gusty through sunset, with speeds beginning to diminish after midnight as the Canadian high pressure becomes more centered over the region.
Satellite image shows low clouds and areas of fog and freezing fog for most of the westside valleys this morning. Low clouds, fog and freezing fog are also in the Scott and Shasta Valley and should burn off early this afternoon.
1125 AM CST Tue Dec 3 2024 Sunny and cold weather is expected today as high pressure moves across the region. Temperatures will moderate some on Wednesday, but rain showers will develop mainly over north Mississippi ahead of another cold front for Wednesday afternoon and evening.
1157 AM MST Tue Dec 3 2024 - The ridge holds strong through this week, with continuing warm and dry conditions.
1202 PM CST Tue Dec 3 2024 Updated at 1138 AM CST Tue Dec 3 2024 - Cooler temperatures today behind a cold front.
Upper level ridging to the north and low pressure overhead in CA.
A low pressure system currently sits over much of central California that was previously off the coast of southern California. The cyclonic flow around the trough is pushing the upper level atmospheric flow to the south of the region, with an area of higher pressure to our north pushing flow through the Pacific Northwest. Conditions are conducive for Tule Fog each overnight and morning period in the San Joaquin Valley through much of this week due to this blocking upper level pattern.
803 PM CST Tue Dec 3 2024 Clear skies have returned to the whole area with high pressure sitting overhead. Temperatures will be much warmer compared to the near freezing highs today. as the next cold front approaches Middle Tennessee.
524 PM CST Tue Dec 3 2024 - Near and southeast of the I-70 corridor, there is a 20% chance for patchy freezing drizzle late tonight, which could effect the Wednesday morning commute.
- Warner temperatures are forecast on Wednesday before a strong cold front moves across the area.
Model guidance continues to struggle with temperatures in snow- covered valleys producing temperatures upwards of 30 degrees warmer than real-time observational data.
615 PM EST Tue Dec 3 2024 Arctic high pressure will build east into the Southeast US through tonight.
(Tonight) High pressure at the surface promoting clear and calm conditions tonight across the Tennessee Valley. A good night for radiational cooling in this cold/dry air mass will drop temperatures into the lower 20s in most locations by early Wednesday morning -- with a few locations dropping into the upper Teens in a few sheltered valley locations.
304 PM MST Tue Dec 3 2024 - The ridge holds strong through this week, with continuing warm and dry conditions.
527 PM CST Tue Dec 3 2024 (Tonight) Warmer temperatures are on tap for tonight across eastern Oklahoma and western Arkansas with a southerly breeze across much of the area overnight. (Wednesday through Tuesday) Warmer temperatures are expected to continue on Wednesday even with a cold front moving into the northern portions of the area as we move into Wednesday afternoon.
Tomorrow, daytime highs will be somewhat warmer as surface winds clock to east-southeast throughout the day. As a result, daytime highs will reach the low to mid 60s for our FL counties with mid to upper 50s across SE AL and SW GA.
546 PM CST Tue Dec 3 2024 Updated aviation portion for 00Z TAF issuance - Periods of light snow/snow showers expected through Wednesday night with the highest risk of accumulations (50-90% chance of at least 2") across far northern Wisconsin.
539 PM CST Tue Dec 3 2024 (Tonight) Another cold night is ahead with a good radiational cooling conditions available as high pressure drifts southeast into Georgia.
627 PM EST Tue Dec 3 2024 High pressure will prevail through mid week.
The low clouds are slowly burning off, but those areas should break out late in the day before becoming socked in again early this evening. We'll have a rinse and repeat scenario with respect to the development of low clouds, fog and freezing fog later this evening through at least tomorrow morning impacting the same areas as this morning. Areas that experience freezing fog (Illinois Valley, Grants Pass area, Rogue, Shasta, and Scott Valley) will result in low visibility along with slick driving conditions for the early morning commute, especially on bridges and any other elevated roads because of not warming from the ground below.
A weak area of low pressure will usher inland today. The primary impact from this low has been partly-to-mostly cloudy skies, but they've resulted in stunning sunrises and sunsets over the last few days. As the low meanders inland this evening, these clouds will clear out of our area, resulting in sunny skies through the rest of the week into the weekend. Additionally, the increased north-south surface pressure gradient over the Colorado River Valley due to this low progression has resulted in elevated north winds and wave heights between 1 and 2 feet at Lake Mohave. These winds and waves will continue each afternoon through the week as the low remains situated overhead thanks to a Rex Blocking pattern (longwave ridge of high pressure across the western CONUS effectively locking the weak low in place to its south).
Another rather cold night on tap as high pressure continues to dominate. However, the high will be moving toward the southeast U. coast overnight and this will shift the low level winds to northeasterly which could limit the radiational cooling some as modified Atlantic air begins to move in. The overall forecast for freezing temperatures and frost still looks ok for the Nature Coast tonight.
550 PM CST Tue Dec 3 2024 - Strong winds gusting 35-45 mph are expected tomorrow afternoon and evening behind a cold front that will dive south across our area.
321 PM CST Tue Dec 3 2024 - Potent cold front moves through Wednesday morning, bringing strong northwest winds with gusts 40 to 55 mph, potential snow showers, and falling temperatures through the day. Warmer temperatures have briefly returned this afternoon with readings ranging from the upper 20s along the Coteau to the lower 50s along and west of the Missouri River.
524 PM CST Tue Dec 3 2024 - Warmer temperatures Wednesday ahead of the next cold front.
25 miles tomorrow AM from around Chico south into Modesto, with the higher chances in the northern San Joaquin Valley. Latest ensemble guidance continues to portray a rather stagnant upper level pattern, with ridging dominating the synoptic regime. A weak upper level low will develop near Baja California tomorrow and translate into the Four Corners region later in the week, while an EPAC high will develop and keep NorCal dry and clear, except for any morning fog that develops.
141 PM PST Tue Dec 3 2024 Cooler conditions are expected through Wednesday with a deeper marine layer.
213 PM PST Tue Dec 3 2024 * Strong valley inversions persist at least into the start of the weekend with areas of freezing fog redeveloping each night. Strong valley inversions with areas of freezing fog are expected to persist at least into the start of the weekend as light winds and high pressure remain stagnant across the region. Areas most impacted by freezing fog continue to be from the Honey Lake basin into Pyramid Lake and adjacent desert basins. Valley areas outside of the freezing fog can still expect strong inversions with hazy conditions and reductions to air quality. The inversions will set up cold overnight lows in the valleys in the teens and low 20s while warmer thermal belt areas along the mid-slopes and ridgelines only drop to near the freezing mark.
921 PM EST Tue Dec 3 2024 High pressure will prevail through mid week.
302 PM CST Tue Dec 3 2024 - Warner temperatures are forecast on Wednesday before a strong cold front moves across the area.
707 PM EST Tue Dec 3 2024 Arctic high pressure will bring the coldest temperatures tonight since last winter.
431 PM MST Tue Dec 3 2024 -Highly variable temperatures through the period as a frontal boundary wavers over the region -Mainly dry in the period with chances for light snow and flurries with any passing system, best chances over northwest SD Frontal boundary will continue to waver over the region through the period as a series of impulses ride SE along the frontside of the mean western NOAM ridge. Strong impulse is diving SE across eastern MT and will bring a cold front in the region tonight.
Probably 20 degrees warmer than yesterday, but it won't exactly feel like it with the gusty winds.
214 AM CST Wed Dec 4 2024 - Warmer today with milder highs in the upper 50s. The temperature rollercoaster continues for early December with an upside day behind a pre-frontal surface trof with highs generally in the upper half of the 50s. This will be followed by a strong cold front late tonight in response to a vigorous upper trof diving southward across the Great Lakes. The eastern conus upper trof will slide eastward off the Atlantic coast as we head into the start of the weekend with subtle ridging over the Plains downstream of the southern branch upper low over southeast Arizona/northern Mexico.
921 PM MST Tue Dec 3 2024 - The ridge holds strong through this week, with continuing warm and dry conditions.
- Warmer temperatures briefly return for Wednesday before colder air moves in on Thursday.
High pressure continues through this period. There has been reasonable consistency on this upper level ridge finally breaking down Sat night/Sun. After this feature finally breaks down the ridge, upper level troughing continues on Mon, but all the clusters show the upper level ridge moving closer to the Gem State by next Tue. All the solutions indicate a high amplitude ridge that will bring a cold northerly flow, so there should be a return to cold temperatures by Tue, with a return to a dry pattern.
The still damp air and mostly cloudy skies should make for mild morning lows, even over the northern counties that eventually see the higher dew points return. Daytime temperatures will be mostly flat for Thursday, since another cold front will slip into the area gradually.
- Warner temperatures are forecast on Wednesday before a strong cold front moves across the area. - Thursday is forecast to be noticeably colder with high temperatures in the lower 20s.
- Warmer on Wednesday, cooler on Thursday, then a warming trend through the weekend. At the surface, high pressure is situated over the Lower Mississippi River Valley. This feature will aide in the return of southerly winds today, thereby resulting in slightly warmer temperatures (low 40s to near 50) across the forecast area. The associated surface temperature drop likely won't be fully realized until Thursday morning as lows dip into the low to mid 20s, with afternoon highs reaching the middle 30s.
Temperatures are a few degrees cooler this morning as expected. This will also flatten the high and it will become elongated across the eastern Gulf of Mexico, across the Florida Peninsula and north of the Bahamas. As the next high pressure dips out of Canada, it will shove this remnant boundary southward across the Keys by the weekend. Winds will turn more northeast to east and slacken to gentle to moderate speeds as high pressure settles into the southeast United States, and eventually southward over the Florida Peninsula.
1125 PM CST Tue Dec 3 2024 Updated aviation portion for 06Z TAF issuance - Periods of light snow/snow showers expected through Wednesday night with the highest risk of accumulations (50-90% chance of at least 2") across far northern Wisconsin. On Wednesday, a strong mid-level trough will drive southeast across the Great Lakes with a surge of strong low-level cold advection. With steepening low-level lapse rates beneath the trough, expect scattered snow showers to develop.
More seasonable, but still cool, temperatures today with increasing high clouds this afternoon and tonight ahead of a cold front. High winds possible tonight across the higher elevations, so we've issued a Wind Advisory for these areas. A strong low pressure system across the Great Lakes will bring a cold front southeastward tonight and Thursday with very strong 850mb gradient westerly winds around 50 kt. This will result in high winds between 50 and 60 mph across the higher elevations, and a Wind Advisory has been issued for these areas tonight through Thursday morning. However, orographic lift in the wake of the cold front will produce some light snow or flurries across the mountains on Thursday morning with limited accumulation of around a dusting to one-half inch currently expected.
This afternoon a mid level trough was located over the Western states and another trough over the east with a northwest flow aloft in between. Lows tonight will mainly be in the lower 30s. This will push another cold front south across the Plains during the day and moving into northern Kansas by late afternoon. Prior to the cold front temperatures will warm into the 50s as cold advection will hold off until the evening hours. Temperatures will fall into the teens Thursday morning as arctic high pressure builds south into the Plains.
1022 PM MST Tue Dec 3 2024 -Highly variable temperatures through the period as a frontal boundary wavers over the region -Mainly dry in the period with chances for light snow and flurries with any passing system, best chances over northwest SD Frontal boundary will continue to waver over the region through the period as a series of impulses ride SE along the frontside of the mean western NOAM ridge. Strong impulse is diving SE across eastern MT and will bring a cold front in the region tonight.
1027 PM CST Tue Dec 3 2024 - Warmer temperatures Wednesday ahead of the next cold front.
These conditions will help to keep temperatures warmer tonight with lows in the 30s/40s.
1039 PM CST Tue Dec 3 2024 Clear skies have returned to the whole area with high pressure sitting overhead. Temperatures will be much warmer compared to the near freezing highs today. as the next cold front approaches Middle Tennessee.
Nearly stationary, strong long wave ridging along the West Coast and a Rex Block (closed 500 mb high north in latitude of a closed 500 mb low) is resulting in above early December normal temperatures and dry weather. Long wave ridging along the West Coast essentially remains unmovable through the remainder of the week. Upper level ridging to the north and low pressure overhead in CA.
1258 AM EST Wed Dec 4 2024 High pressure will prevail through mid week. A cold front will push across the area Thursday, with the return of high pressure into the weekend. In general, 21-26F will prevail inland from US-17, where freezing temperatures will persist through about 9 AM. Closer to the coast, upper 30s and lower 30s will be common, with the freezing line down close to the Intra-Coastal Waterway. Modified arctic high pressure will propagate across the Southeast U. The high will meander offshore Wednesday night into Thursday as another cold front approaches. The low-level flow veers westerly pretty quickly ahead of the front, thus limiting deep moisture return as the boundary meanders through.
Chances are increasing that the ridge of high pressure will weaken by the weekend with a return of light wintry precipitation.
(Today through Thursday) The high pressure system currently centered just to our east will slide away from the area through the afternoon and becomes centered off the East Coast. Meanwhile, a strong low pressure will swing through the Great Lakes and drag a cold front to the ArkLaTex area by the afternoon.
Temperatures are expected to be in the lower 50s to lower 60s across the state for your Wednesday before dropping back into the mid 30s to lower 50s by Thursday afternoon.
Scattered mid and high-level clouds will continue to stream across the region through the evening as a weak area of low pressure moves into Arizona.
Southerly winds will work to recover temperatures slightly today with areas across the south just reaching above freezing. Tonight, a descending trough to the northeast will drag with it a front. Have lowered highs, keeping northern Iowa right at freezing which it should reach in the morning hours just before the fropa. In the extended, an upper level trough will stall over the southwest CONUS and bring in a WAA regime for the weekend.
(Tonight through Thursday night) The synoptic pattern for the next few days will feature a low to the northeast and another one west with the southern Plains under a low amplitude ridge. A weak lower level disturbance and a warm front that's in the vicininty will keep rain chances in the forecast for now. Afternoon temperatures today will top out in the mid 70s across the region and around the low 70s for tomorrow under mostly cloudy skies.