Aikyam-Lab/Synoptic-Bench huggingface dataset:
With the high still slipping in some cold air through the evening, the cloud cover will only help a bit with the cold highs and then light winds this evening. Min temps tonight will dip to the single digits north to the lower teens central to south. Tomorrow will see the high continue to slide east with H850 temperatures warming 12C from 18z today to 18z Friday; moderating to 2C from -10C today. Mixing winds tomorrow will likely bring highs back the lower 30s northeast to the upper 30s/lower 40s southwest - the 50th percentile temperatures.
High temperatures today will be warmer than the past few days, however still several degrees below normal with mid to upper 70s for most areas. Milder low temps are expected tonight with lows ranging from the lower 50s around the lake, to upper 50s and lower 60s across the east coast metro. A cold front associated with a potent system in upper New England will approach the area from the north on Friday, and should cross through South Florida by late Friday evening.
As the low-levels continue to dry from the northeast overnight, any precipitation chances will remain confined to locations right along the Rio Grande. Overnight lows will range from the mid 30s to the lower 40s. Some moistening of the lower levels is expected and with stronger warm air advection, precipitation amounts should trend upward with one-quarter inch or less for most areas.
Additional snow showers will continue across the region this afternoon as a cold front associated with low pressure centered over the Canadian Maritimes pushes through. Additional snow accumulations will generally be a few tenths of an inch across the broad valleys, with a few inches across the higher terrain as snowfall becomes more focused on the western slopes of the Adirondacks and Green Mountains. Snow shower chances will continue to decrease overnight through the day Friday, with limited moisture and forcing as the low continues to pull towards the east.
219 PM EST Thu Dec 5 2024 * Cold Thursday night and Friday morning with temperatures in the low to mid teens.
1226 PM EST Thu Dec 5 2024 High pressure will slowly build into the region later today into Friday. The high will pass south of the area over the weekend.
1141 AM CST Thu Dec 5 2024 Drier and colder air will move into the Mid-South today behind the cold front that moved through the region last night. Temperatures will be some 10 to 20 degrees colder today with highs in the lower 30s to mid 40s.
946 AM MST Thu Dec 5 2024 - A recent cold frontal passage will bring cooler temperatures to the region today. as 1035-1040 mb high pressure progresses southeastward from the Dakotas to the Central MS River Valley. when and where SSW-SW flow at ~1000 ft AGL will advect a -relatively- warmer airmass atop a shallow, colder surface/near-surface airmass. Further west/uphill (away from the 'shore') in eastern Colorado and far western Kansas, where low-level warm advection will commence later this morning, expect warmer highs. as 1030-1035 mb high pressure over the Central-Southern MS River Valley progresses east toward the Southern Appalachians. on the eastern periphery of a low-level trough (accompanying the aforementioned upper low) in the lee of the southern Rockies.
Wind chill readings may drop as low as the lower teens above zero tonight.
1032 AM MST Thu Dec 5 2024 - Cooler wx today with areas of some morning stratus over the plains.
1145 AM CST Thu Dec 5 2024 (Rest of Today) A cold front is currently pushing south through the Tennessee Valley and will continue to move through areas south of the TN River this morning. Temperatures will not rise much warmer than they currently sit (upper 30s/mid 40s), and will begin to fall during the afternoon hours.
252 PM CST Thu Dec 5 2024 - Flurries possible north central WI Friday/Warmer through the weekend.
However, looking at the KOAK sounding it's rather dry in the lower levels. (Today and tonight) Let's take a trip up to 500 millibars, shall we? This level shows us a Rex Block with high pressure over the Northern Great Basin and low pressure over the Desert Southwest. These clouds will limit the amount of solar radiation, thus temperatures are expected to be slightly cooler compared to yesterday and what they are expected to be tomorrow, albeit still above average.
Updated at 236 PM CST Thu Dec 5 2024 - Cold subfreezing temperatures tonight with warming trend starting Friday.
1201 PM CST Thu Dec 5 2024 (Today through Friday) A weak cold front will drop south through Deep South Texas today, before becoming stationary in the vicinity of the Rio Grande River. High temperatures this afternoon will likely range from the upper 60s to low 70s, with overnight lows tonight in the low 50s to low 60s. High temperatures Friday look to be slightly warmer over southeastern portions of the CWA as the frontal boundary slowly drifts northward. High temperatures look to range from the low 60s to the mid 70s.
219 PM CST Thu Dec 5 2024 - Chilly temperatures today with warmer temperatures returning by the weekend.
After a small warm up today another cold front is heading our way tomorrow morning. High pressure, sunny skies and cooler weather will welcome us during the weekend with near freezing temperatures again across the Nature Coast with 40's to low 50's south of I-4.
Cold high pressure over the region today drew wind chills into the single digits above and below zero this morning. By 2 PM, temperatures had "warmed" into the low to mid 20s, with light and variable winds.
(This evening through Friday Night) A potent cold front is completing its passage from north to south across the ArkLaTex, and behind this surface boundary, a very dry and very cold airmass will spill southward into the region. That being said, guidance consensus is in agreement that temperatures will plunge to sub- freezing values by daybreak for all but our southwesternmost sites in east Texas, ranging from near freezing in Lufkin to the upper 20s along the I-49 corridor and middle 20s into southwestern and south central Arkansas.
1129 AM CST Thu Dec 5 2024 - Cold start to the day with wind chills -5 to -15F, perhaps a few degrees cooler in areas west of the Mississippi River.
1103 AM CST Thu Dec 5 2024 - A cold front's passage will bring a blast of arctic cold today through tomorrow.
High pressure remains the dominant feature with the center of the high tracking southeast and over NE/IA/MO border by this evening, with the CWA on the northwest quadrant of this high. 850mb winds will be zonal this evening with the coldest temps (-7 to -9C) east of the James River by 00Z Friday, closer to this high. These winds will then switch to the northwest and usher in warmer air from under the ridge with temps ranging from -1 to +5C by 12Z.
Mild and quiet conditions persist through the weekend with breezy north winds in the Lower Colorado River Valley.
Satellite image shows mid and some low level clouds moving in from the west in response to a weak upper trough moving into the area. The upper trough provided just enough instability to break up the areas of fog that impacted the interior westside valleys last night.
The lower conditions should improve to VFR, for at least brief time, by this afternoon. This interruption in the pattern will be brief with high pressure returning tonight through Friday. Satellite image shows mid and some low level clouds moving in from the west in response to a weak upper trough moving into the area. The upper trough provided just enough instability to break up the areas of fog that impacted the interior westside valleys last night.
For tonight with the cold air settling to the southeast as high pressure center shifts south toward the lower Mississippi Valley temperatures are expected to bottom out in the teens with isolated higher elevation spots in the single digits in some wind sheltered areas.
As of 9:30am, satellite continues to indicate partly to mostly cloudy skies over the area, per mid level moisture, with light winds as a high pressure system will be the dominant feature for today. As the center of the high moves southeast of the region later this afternoon, we do start to get some warm air advection enough to where central SD should be able to rise into the 20s.
1121 AM CST Thu Dec 5 2024 (Today through Friday) The cold front has not yet made it to middle TN. Temperatures will take a big drop from the mid 40s to back near freezing today. Drip those faucets! Friday will still be quite cold with highs barely above freezing.
327 PM EST Thu Dec 5 2024 - Gusty winds behind an arctic cold front will diminish today. Precip with the cold front itself has also diminished and moved southeast out of the area. A strong cold front is in southeast KY early this morning and will exit into VA shortly. The center of the high will settle near western KY by Friday morning. This may allow many of the valleys to decouple from the low level flow.
Mostly mid-high cloud, associated with a somewhat weak cold front, has moved over the coastal region this morning. Temperatures will remain unseasonably warm through the week as high pressure ridging stays in place and amplifies.
1146 AM CST Thu Dec 5 2024 (Today through Friday Night) To begin the period, a cold front will continue to push across the state bringing in cooler and drier air behind it. Patchy dense fog currently being observed across central and southern locations will improve over the next few hours as the cold front continues to push south and east. High pressure is expected behind the front with calm and dry conditions likely through much of the period.
1135 AM CST Thu Dec 5 2024 - Cool, Arctic air behind a passing cold front brings cooler than average temperatures today across most of north central Nebraska and the Sandhills.
Skies will remain clear this evening, but with stable conditions low clouds, fog and freezing fog will once again develop late this evening and lasting into most, if not the entire morning hours Friday in the Umpqua Basin, Illinois, Applegate, Grants Pass area, and the Rogue Valley. Could not rule out patchy freezing fog in the Scott Valley, but confidence is high enough to include it in the forecast. Once the low clouds and fog burn off in the above mentioned valleys, skies will be clear with scattered high clouds moving in from the west in the afternoon.
Mid afternoon surface analysis had a strong cold front across southern Alabama with a >1032mb high centered over the central Plains. This strong low-level cold advection has knocked temperatures down into the 30s across the northern half of the CWA and temperatures will fall below freezing over most of the CWA early this evening.
High pressure remains in place over the region, resulting in air stagnation concerns for inland valleys away from the mouth of the Columbia River Gorge.
550 PM CST Thu Dec 5 2024 - Flurries possible north central WI Friday - Warmer through the weekend.
The only fly in the ointment has been, and continues to be, the low level inversions over the Gunnison River Valley and portions of the northern valleys.
and so if skies remain on the clearer side, locations in the Piney Woods could fall to at/near freezing overnight. Otherwise (and elsewhere), look for lows tonight in the lower to mid 40s.
Tomorrow will feel slightly warmer with highs in the 30s, plenty of sunshine and light winds. Friday will be sunny but still quite cold with highs barely above freezing. The high pressure center will remain in place Friday night allowing good radiational cooling with widespread lows in the teens.
613 PM CST Thu Dec 5 2024 An arctic cold front has traversed the area, and while temperatures have not necessarily dropped as quickly as one might expect behind such a named front, temperatures are expected to rapidly tumble after sunset as robust cold air advection continues. Tomorrow night overnight lows are expected to "rebound" back into the high 20s in the northeast, and low to mid 30s elsewhere, as the high associated with the above stated arctic air mass shifts eastward.
High pressure and attendant quiet, low-impact weather continue, with freezing fog continuing to be our only concern. The airmass really hasn't changed at all compared to last night/this morning, winds will be VERY light, and both the NBM and HRRR are supporting another round of localized dense freezing fog in areas similar to what we saw this morning (like Bear Lake, just west of Pocatello along I-86, perhaps the Arco Desert, etc. Thus, will carry freezing fog in the forecast once again in many valley and plain locales.
326 PM CST Thu Dec 5 2024 An arctic cold front has traversed the area, and while temperatures have not necessarily dropped as quickly as one might expect behind such a named front, temperatures are expected to rapidly tumble after sunset as robust cold air advection continues. Tomorrow night overnight lows are expected to "rebound" back into the high 20s in the northeast, and low to mid 30s elsewhere, as the high associated with the above stated arctic air mass shifts eastward.
241 PM PST Thu Dec 5 2024 Low clouds with areas of freezing fog and drizzle will persist over the region into Friday and may lead to more slick conditions in the morning.
A weak low pressure system will bring a 15 to 40 percent chance of light rain showers or high elevation snow today through tomorrow, mostly focused east of Tucson and along the White Mountains and other eastern areas of southeastern Arizona.
633 PM CST Thu Dec 5 2024 Updated at 236 PM CST Thu Dec 5 2024 - Cold subfreezing temperatures tonight with warming trend starting Friday.
236 PM MST Thu Dec 5 2024 KEY MESSAGES: - Ridge of high pressure remains in place through the end of the week resulting in stable conditions with valley fog, stratus, and very light snow at times.
Freezing Fog Advisory has been issued for the Missoula/Bitterroot Valleys until 11 AM MST Friday. Dense freezing fog has been observed across portions of the Missoula and Bitterroot Valleys early this evening. Confidence is high for fog to expand overnight and become widespread across the Missoula/Bitterroot Valleys, therefore, a dense freezing fog advisory has been issued through 11 AM MST Friday. Dense freezing fog has developed for KMSO and KHRF. /ISSUED 236 PM MST Thu Dec 5 2024/ KEY MESSAGES: - Ridge of high pressure remains in place through the end of the week resulting in stable conditions with valley fog, stratus, and very light snow at times.
442 PM CST Thu Dec 5 2024 - Chilly temperatures today with warmer temperatures returning by the weekend.
527 PM CST Thu Dec 5 2024 (This evening through Friday Night) A potent cold front is completing its passage from north to south across the ArkLaTex, and behind this surface boundary, a very dry and very cold airmass will spill southward into the region. That being said, guidance consensus is in agreement that temperatures will plunge to sub- freezing values by daybreak for all but our southwesternmost sites in east Texas, ranging from near freezing in Lufkin to the upper 20s along the I-49 corridor and middle 20s into southwestern and south central Arkansas.
The Florida peninsula has been under the influence of high pressure ridging through the day, which has kept the area rain-free and warmer than the previous few days. A change is on the horizon though as a cold front currently draped across northern Florida slips southward through the day on Friday. A cooler day is expected for tomorrow north of Tampa Bay topping out only in the upper 50's to mid 60's, while central and southwest Florida will likely reach the low to mid 70's. A cold front will push through the area on Friday with cloudy skies expected. High pressure ridging across south Florida and into the Gulf of Mexico will keep rain-free conditions and light winds around 5-10 knots overnight. A cold front moves through the eastern gulf waters on Friday, bringing a chance for showers over the northeast gulf.
The low stratus and fog has expanded eastward across the Upper Snake Plain past Mountain Home and nearly to Gooding. Areas of LIFR fog and low stratus in the lower valleys will persist in most of the Upper Treasure Valley, Upper Weiser Basin and mountain valleys tonight with surface visibility 1/4 mile or less at times.
924 PM PST Thu Dec 5 2024 Low clouds with areas of freezing fog and drizzle will persist over the region into Friday and may lead to more slick conditions in the morning.
1052 PM CST Thu Dec 5 2024 Updated at 236 PM CST Thu Dec 5 2024 - Cold subfreezing temperatures tonight with warming trend starting Friday.
08z GOES water vapor imagery shows a large upper low over Hudson Bay and broad cyclonic flow encompassing the eastern two-thirds of the conus.
103 AM CST Fri Dec 6 2024 - One more day of frigid Arctic cold will be realized today with start day temperatures in the lower half teens and highs projected only into the 30s even with full sunshine.
Short Term Update - Weak ridging will remain just off to our north through the overnight period. Expect stable, coolish, rain free, but damp conditions overnight lows ranging broadly in the lower 60s with dew points remaining near 60. This along with cooler gulf and bay side waters will keep winds light out of the north to northeast on our nearshore waters.
1013 PM CST Thu Dec 5 2024 - Chilly temperatures today with warmer temperatures returning by the weekend.
In the "warm" sector, a weak southerly flow (nearly calm at the surface) has kept conditions warmer and slightly more humid overnight.
As such, expect mostly clear/sunny skies today as arctic high pressure continues to build in from the west-northwest. Temperatures will run some 15-20 degrees cooler than normal today as a result.
At the upper levels, broad cyclonic flow can be seen through the Great Lakes and northeastern US while a weak Rex blocking pattern is noted over the western CONUS.
Calm to light winds will allow wind chill temperatures to be only 1-2 degrees cooler in most locations.
There is a chance for precipitation into weekend as a trough moves down the Canadian coast. A cold front will bring rain and light snow to the area through the day Saturday.
508 AM CST Fri Dec 6 2024 (Tonight through Saturday night) Key Messages: - Rain chances continue today through Saturday night - Cooler temperatures today Temperatures will be cooler today with highs in the mid-50s to low-60s. Though it will still be cloudy, drier air moving in at the lower levels will result in a higher cloud deck, so it should feel a little less gloomy outside--even with the rain chances continuing.
406 AM EST Fri Dec 6 2024 Cold weather will last through Saturday as Canadian high pressure moves across the region.
After any snow ends, Saturday should have the mildest weather in the last ten days, as gusty southwest winds bring up warmer air.
The cold rains and light north breezes may make the air feel like freezing, which is about where our minimum Apparent T values bottom out at.
219 AM MST Fri Dec 6 2024 KEY MESSAGES: - Warmer temperatures are expected across the region today and Saturday. - A cold front Saturday night will bring chances for precipitation, cooler temperatures, and gusty west winds. The large Pacific Northwest ridge will continue to move east to bring warmer conditions to northeast Montana today and Saturday.
Valley inversions continue to be the main story across northern and central Utah as high pressure remains entrenched across the region.
- Significantly cooler today, with afternoon highs running 10 to 15 degrees cooler than yesterday.
A weak low pressure system will bring a 15 to 40 percent chance of light rain showers and high elevation snow today through tomorrow, mostly focused east of Tucson.
508 AM CST Fri Dec 6 2024 (Today through Saturday Night) It's a very cold/dry morning across the state as sfc ridging continues to settle in over the area beneath H500 NW flow across the middle of the country. Sfc ridging will slowly sink south and east, away from the state over the next day or so. A split flow pattern aloft will be in place through Saturday as H500 NW flow remains across the northern/eastern US while a cutoff mid-level cyclone south of the Four Corners is providing SW flow across the S/SW US. Dry conditions will persist through Saturday but clouds and moisture will slowly increase from the S/SW as the SW H500 cyclone finally begins to lift northeast toward the area.
Issued a freezing fog advisory for the Camas Prairie in Idaho due to low visibility and ice formation possible on roadways.
Clear skies and radiational cooling have supported truly frigid conditions to develop areawide overnight, with even our furthest southern tier only rising above freezing in the past hour or so. - Significantly cooler today, with afternoon highs running 10 to 15 degrees cooler than yesterday.
623 AM EST Fri Dec 6 2024 Cold weather will last through Saturday as Canadian high pressure moves across the region.
Temperatures have dropped into the lower to mid 60s in all island communities, with dew points in the lower 60s. Weak ridging to our north is still holding steady. Stronger winds are being measured along the Reef due to the warmer waters allowing for more mixing. Meanwhile, light to gentle breezes are being observed north of the island chain where the shallow, cooler waters are. A reinforcing cold front currently draped over northern Florida will slowly slide down the Peninsula over the next 24 hours. High pressure will build in behind the front and winds will increase in response.
Warm and mild conditions will continue through the weekend with breezy winds in the lower Colorado River Valley.
08z GOES water vapor imagery shows a large upper low over Hudson Bay and broad cyclonic flow encompassing the eastern two-thirds of the conus. NBM continues to trend warmer for Saturday.
A weak closed low was located over the AZ/Mexico border this morning as ridging pushes from the Pacific into California.
343 AM CST Fri Dec 6 2024 - A little warmer today then a strong warming trend through the weekend.
(Today through Saturday) Cold front has cleared the area with cold dry air filtering in. Some breezy conditions this morning along with quite cool temps will make the temp feel a bit cooler than what it will be, even some upper teens north this morning. This low will slowly begin to work its way northward Sat through Sat night.
- A little warmer today then a strong warming trend through the weekend.
High pressure, sunny skies and cooler weather will welcome us during the weekend. The big difference this time around with the cooler air is temperatures will bounce back a littler quicker.
1037 AM CST Fri Dec 6 2024 - One more day of frigid Arctic cold will be realized today with start day temperatures in the lower half teens and highs projected only into the 30s even with full sunshine.
1251 PM EST Fri Dec 6 2024 High pressure will build into the region through the weekend. This might be slightly offset by very subtle warm advection in the lower atmosphere. Temperatures will be below freezing in many places by 8 or 9 PM, and staying below 32F for up to 12 hours into Saturday morning. Saturday will feature high pressure at the surface with ridging aloft just to the west of the local forecast area.
1143 AM CST Fri Dec 6 2024 (Tonight through Saturday night) Key Messages: - Rain chances continue today through Saturday night - Cooler temperatures today Temperatures will be cooler today with highs in the mid-50s to low-60s. Though it will still be cloudy, drier air moving in at the lower levels will result in a higher cloud deck, so it should feel a little less gloomy outside--even with the rain chances continuing.
1233 PM EST Fri Dec 6 2024 Cold weather will last through Saturday as Canadian high pressure moves across the region.
1247 PM EST Fri Dec 6 2024 Remaining cold and gusty in the mountains; a bit warmer in the lowlands. High pressure Friday/Saturday.