Aikyam-Lab/Synoptic-Bench huggingface dataset:
321 AM EST Thu Dec 21 2023 Dry high pressure will linger over the region through the weekend and maintain above normal temperatures.
344 AM EST Thu Dec 21 2023 High pressure will prevail through the rest of the week. Southern stream cut-off low remains off the coast of CA with downstream ridging through the central and eastern CONUS. A little milder tonight with lows spanning the 30s, warmer along the coast.
1255 AM EST Thu Dec 21 2023 High pressure maintains dry conditions into Friday as temperatures moderate.
A cold front will bring chilly temperatures to the region tonight through Friday night.
- Chance of light rain, with a slight chance of freezing drizzle across the north, late Thursday night into Friday morning.
1114 PM CST Wed Dec 20 2023 (Tonight) With high pressure at the sfc anchored over the Appalachians this evening, light ESE flow continues across the CWFA. Current temps range from the lower 30s in sheltered valley locations in NE AL/Srn Middle TN, while elsewhere, temps have just dipped into the upper 30s in Srn portions of the CWFA.
Expect warmer temperatures today and quiet weather. Large scale ridging will continue to dominate through Friday giving us continued above average temperatures in the 30s and 40s.
High pressure remains anchored across the Appalachians promoting calm winds and mostly clear skies. Forecast soundings depict a strong inversion which will lead to sheltered valleys being colder than the higher ridgetops. Think this may affect lows again tonight with variable high clouds moving through the upper ridge. Have brought lows up a couple degrees above the MET/MAV guidance with most areas in the lower to mid 20s. slightly warmer at Chattanooga. Again tonight midslope temperatures will be warmer than the valleys with a low level inversion. Lows in the midslope areas are expected to be in the lower to mid 30s. Highs a little warmer in the lower to mid 50s.
234 AM EST Thu Dec 21 2023 Cool and dry conditions with lighter winds are expected through the remainder of the week as high pressure builds over the region.
1241 AM EST Thu Dec 21 2023 High pressure will be in place across the region today into Thursday, with mild temperatures expected through the weekend.
Highs tomorrow will be slightly warmer, in the mid 50s, with more cloud cover. Beyond Friday the pattern becomes more amplified as an upper level trof digs over the Four Corners region with a couple lobes of energy rounding through it.
(Today and tonight) A short wave trough axis was currently just west of the area bringing very light rainfall in eastern New Mexico. Overnight temperatures tonight will be cooler as skies clear out.
Latest water vapor imagery indicates an impressive fetch of subtropical moisture streaming over the region ahead of a large closed low off of the Southern California Coast, with little change in the overall pattern expected locally over the next 36 hours, even as the low begins to pivot over northern Baja through Friday. Highs today and Friday look to top out in the middle 60s to around 70 degrees for most, and lows tonight in the middle 30s northwest and in the mountains to the lower 50s east.
1256 AM EST Thu Dec 21 2023 High pressure will prevail through the rest of the week. High clouds are slowly thinning as high pressure holds firm. Lows will range from the upper 20s well inland (with a few mid 20s in select locations) to the lower 40s at the beaches and Downtown Charleston.
A dry cold front brings cooler temperatures and slight chances for snow to the area, with the best chances near the OR border. While the closed low off the coast makes its way south, a plentiful amount of moist air continues to hang around our region causing areas of dense fog, especially for Sierra valleys and eastern Sierra valleys.
Farther west, high clouds on the nose of a subtropical jet and overspilling an upper ridge are limiting radiational cooling. These clouds will continue to increase across our area through the day, but no rain is expected given much drier air in the low levels.
- Warmer Friday. Otherwise, the next minor concern is a UL trof moving across the state today. Will taper the pops from the west to the east as the day continues and as the UL trof clears southwest Kansas. Otherwise a tranquil night is expected tonight with lows in the upper 20s to lower 30s west and warmer across south central Kansas.
Large area of strong high pressure remains centered over Eastern Ontario and James Bay early this morning. High pressure center will push eastward thru Quebec today and tonight. Maintenance of weak over-lake instability and low level moisture will likely continue to produce a spotty light mix of flurries/freezing drizzle/drizzle throughout the day.
With the broad upper-level ridge continuing to sit over much of CONUS, expect another mild and quiet day.
A Freeze Warning remains in effect for inland SE GA which has the best chance to cool to freezing temperatures. Dry and cool conditions persist as onshore flow continues with high pressure to the north. Coastal troughing will develop isolated showers across the NE FL waters today into tonight.
A strong cold front will approach Idaho from the west as an upper level system moves through Idaho.
High pressure will remain across the region through Friday.
A pause in the rain, or at least diminished coverage, is expected late Friday night as sufficient mid-level moisture departs and a ridge axis builds into the central U.
621 AM EST Thu Dec 21 2023 High pressure maintains dry conditions into Friday as temperatures moderate.
929 AM EST Thu Dec 21 2023 Dry high pressure will linger over the region through the weekend and maintain above normal temperatures.
At 09Z, temperatures were mainly in the low 50s across the area with dew points in the mid 40s, making for a very warm night/early morning.
A ridge of high pressure will continue to move east of the FA today allowing for an increase in cloud cover. MaxTs will be a bit warmer in the mid-50s while minTs will fall into the 30s for one final night.
608 AM EST Thu Dec 21 2023 (Today through Friday) With the settling ridge of high pressure, primarily dry conditions are anticipated to continue for most of South Florida through the remainder of the week. Temperatures will warm to near seasonal by the end of the week as the expansive ridging continues to support the gradual warming trend. Afternoon highs today and Friday will reach the low to mid 70s across South Florida, with overnight lows in the mid to upper 50s (interior) and low 60s (east coast).
433 AM MST Thu Dec 21 2023 High pressure creating inversions over the region will result in low stratus and valley fog today and tonight.
Dry weather and clearing skies are expected today as high pressure continues to build aloft. An associated weakening cold front will spread east and south across Northern California, bringing light rain for areas mostly north of Mendocino County.
Cloud coverage will increase today over C AL some as cirrus over MS should propagate this way around the upper ridge over E Conus.
917 AM EST Thu Dec 21 2023 Only minor tweaks this morning to the inherited forecast as mixed drizzle/freezing drizzle/light snow continues to percolate off of Lake Huron at times. most notable across northeast lower and the higher terrain of north-central lower. Large area of strong high pressure remains centered over Eastern Ontario and James Bay early this morning. High pressure center will push eastward thru Quebec today and tonight. Maintenance of weak over-lake instability and low level moisture will likely continue to produce a spotty light mix of flurries/freezing drizzle/drizzle throughout the day.
702 AM EST Thu Dec 21 2023 Easterly low level flow continues across SE Mi between northern Ontario high pressure and a front stalled across northern IN/OH. Low pressure organizing in the central Plains takes over tonight by increasing VFR clouds along and north of the front which progress SW to NE across Lower Mi.
A dry cold front will sweep through the region on Friday bringing strengthening northwest winds and cooler conditions for the upcoming weekend. To the north, over the greater Bay Area, expecting temperatures to warm into the low-to-upper 60s. Cooler conditions will prevail to the south in response to cloud cover and lingering precipitation.
500 AM EST Thu Dec 21 2023 Key Message: * High pressure will keep our weather dry and fair through Friday. A light southerly gradient wind will tend to keep ridge tops (thermal belt) warmer with lows in the mid 30s, possibly higher. These southerly winds may be strong enough to mix out some of our western valleys area tonight, which should favor slightly warmer temps around 30 degrees in those areas. Cloud cover tonight will generally be high, at or above 15 kft, but may be thick enough to limit the ridge valley split.
516 AM CST Thu Dec 21 2023 (Today and tonight) A short wave trough axis was currently just west of the area bringing very light rainfall in eastern New Mexico. Overnight temperatures tonight will be cooler as skies clear out.
Expect this low level moisture to gradually increase over the area for the morning hours, with increasing depth of the moisture leading to increasing rain chances for the late afternoon into the nighttime hours.
The mild December weather pattern continues for the remainder of the workweek before slightly cooler conditions move in this weekend.
230 AM MST Thu Dec 21 2023 Today through Friday night: A benign weather pattern continues with much warmer than normal temperatures as high pressure stays over the region under a strong upper level ridge. With similar conditions to yesterday, went toward the warmer end of guidance which translates to widespread 50s this afternoon. As winds decouple under mostly clear skies, there is medium confidence (50%) for freezing fog mainly north and east of Wolf Point to Sidney Friday morning.
257 AM MST Thu Dec 21 2023 The mild December weather pattern continues for the remainder of the workweek before slightly cooler conditions move in this weekend.
931 AM EST Thu Dec 21 2023 High pressure will prevail through the rest of the week. A little milder tonight with lows spanning the 30s, warmer along the coast.
Above normal temperatures will continue Thursday and Friday with highs in the low to to upper 70s and overnight lows in the mid to upper 60s.
504 AM CST Thu Dec 21 2023 (Today) High pressure has moved over the Southeast resulting in light winds and mostly clear skies this morning. With a very dry airmass in place, indicated by dewpoints in the upper teens to lower 20s, no fog/freezing fog is expected this morning.
624 AM EST Thu Dec 21 2023 Dry high pressure will linger over the region through the weekend and maintain above normal temperatures.
940 AM EST Thu Dec 21 2023 High pressure maintains dry conditions into Friday as temperatures moderate.
Highs today will be in the upper 50s to lower 60s, then highs on Friday will be in the lower to mid 60s.
(Today through Friday) High pressure and dry conditions will continue through the short term period.
629 AM EST Thu Dec 21 2023 High pressure will prevail through the rest of the week. Southern stream cut-off low remains off the coast of CA with downstream ridging through the central and eastern CONUS. A little milder tonight with lows spanning the 30s, warmer along the coast.
Upper level low that brought rain to NorCal the past several days is tracking south towards SoCal this morning.
A dry cold front will sweep through the region on Friday bringing strengthening northwest winds and cooler conditions for the upcoming weekend. Will continue to monitor these areas for the slight potential for heavier convective showers this afternoon, as it isn't necessarily the overall rain amounts, but rather the higher rainfall rates that would potentially cause issues over areas where soil moistures remain high from yesterday's rain. To the north, over the greater Bay Area, expecting temperatures to warm into the low-to-upper 60s. Cooler conditions will prevail to the south in response to cloud cover and lingering precipitation.
1050 AM MST Thu Dec 21 2023 The mild December weather pattern continues for the remainder of the workweek before slightly cooler conditions move in this weekend.
1115 AM CST Thu Dec 21 2023 (Today and tonight) A short wave trough axis was currently just west of the area bringing very light rainfall in eastern New Mexico. Overnight temperatures tonight will be cooler as skies clear out.
1216 PM EST Thu Dec 21 2023 Dry high pressure will linger over the region through the weekend and maintain above normal temperatures.
(Tonight through Friday night) Southwesterly flow aloft ahead of a low pressure system off the coast of California will continue to push a few disturbances across the area through the period along with Pacific moisture. At the lower levels, a persistent weak to moderate onshore flow will increase moisture transport into the region, which combined with the passing of the upper level weaknesses and some isentropic upglide will result in low to medium rainfall chances (20-50%) for South Texas through Friday night. Overnight lows will range in the low to mid 60s both tonight and Friday night, with highs on Friday reaching into the low to mid 70s.
Increasing cloud cover will result for areas of central Nevada, as moisture continues to wrap around the eastward side of the low up into the state. Lows will be cooler, dropping into the teens to low 20s. Colder air is on the way behind the trough.
249 PM CST Thu Dec 21 2023 Forecast discussion for routine afternoon forecast issuance - Chance of light freezing drizzle northwest of a line from Wautoma to Waupaca to Niagara late tonight into Friday morning.
356 PM EST Thu Dec 21 2023 A front will remain stalled across the region for tonight before lifting north as a warm front on Friday.
152 PM EST Thu Dec 21 2023 Expansive high pressure centered over northern Quebec will extend southwards across our region through Friday.
Warmer conditions are still expected this afternoon, but clouds could keep them a little lower than forecasted. However, no plans to adjust temps down at this point given the warm front is close to I-74 and will continue to move north early this afternoon. A pause in the rain, or at least diminished coverage, is expected late Friday night as sufficient mid-level moisture departs and a ridge axis builds into the central U.
Dense cloud cover will keep our highs slightly cooler today, compared yesterday, but still above normal for this time of the year.
207 PM EST Thu Dec 21 2023 High pressure into Friday night as temperatures moderate.
Through Friday the forecast remains simple, mostly dry, warm, and quiet thanks to dirty ridging. The pattern starts to get interesting this weekend as a cut-off low gets pulled up from the southwest near the US/Mexico border toward the central rockies. This is a result of a trough/upper-low diving down from the PACNW. This is a tricky forecast, because much will be determined by the strength and location of the cut-off low. It no longer looks like two upper-lows combining into a strong upper-low, instead it looks more like the southern cut-off low gets absorbed into the upper-level flow and weakens. The result is a skinny trough, with forcing spread out over a long distance.
Tomorrow will be quiet and slightly warmer as upper ridging moves overhead.
At the upper levels, very weak ridging will remain over the local area. High temps today and tomorrow will generally be in the low to middle 70s.
Despite the cloud cover, high temperatures will likely warm into the 60s areawide, with locations south of I-20 possibly reaching the lower 70s.
(This afternoon through Friday) High pressure centered to the northeast of AL will slowly meander to the east through the short term. Friday, winds will increase into the afternoon as a trough to the west approaches the MS River Valley, and the pressure gradient begins to strengthen. Warmer air will begin to advect with moisture and PW values increasing.
1107 AM CST Thu Dec 21 2023 (Rest of Today) High pressure remains stationed just to east keeping winds light and conditions dry.
This activity should weaken through the rest of the morning as the low level jet subsides, with just some lingering sprinkles into the early afternoon.
Subsidence behind this trough is quickly eroding any lingering clouds and fog from this morning.
There's plenty of high cloud cover this afternoon with temperatures in the low to mid 50s. The short term forecast remains benign with lows in the low to mid 30s tonight and temperatures on Friday another 5 degrees warmer than today.
1211 PM EST Thu Dec 21 2023 High pressure will prevail through the rest of the week. A little milder tonight with lows spanning the 30s, warmer along the coast.
This should be rain or drizzle, but surface temps and dew points are marginal enough across the northeast interior zones to have mention a period of freezing rain or drizzle there Friday morning. No travel impacts are expected as skin temps should be above freezing shortly after the onset of steady precip. The current forecast calls for three days in a row of highs in the low to mid 50s beginning Christmas Eve. Across the Central Plains, a deepening trough on Christmas Day may end up pinching off a closed upper low across the Midwest by late Christmas or on the 26th. A prolonged period of rain showers may occur starting Christmas night and lasting for a few days as this upper level low meanders eastward.
904 AM MST Thu Dec 21 2023 The mild December weather pattern continues for the remainder of the workweek before slightly cooler conditions move in this weekend.
Light, southerly winds have allowed for temperatures to warm into the low 50s, however the cloud coverage has barred the region from reaching the mid 50s.
(The rest of this afternoon ) Mild and breezy conditions continue this afternoon with temperatures climbing into the lower 60s across portions of the area despite the extensive cloud cover. The unseasonable mild weather will continue through the holiday weekend ahead of stronger upper level low, currently located off the southern CA coast.
High cloud cover will continue to filter in and will help temperatures be a tad warmer but still chilly in the seasonable low/mid 30s.
1237 PM EST Thu Dec 21 2023 Only minor tweaks this morning to the inherited forecast as mixed drizzle/freezing drizzle/light snow continues to percolate off of Lake Huron at times. most notable across northeast lower and the higher terrain of north-central lower. Large area of strong high pressure remains centered over Eastern Ontario and James Bay early this morning. High pressure center will push eastward thru Quebec today and tonight. Maintenance of weak over-lake instability and low level moisture will likely continue to produce a spotty light mix of flurries/freezing drizzle/drizzle throughout the day.
1221 PM EST Thu Dec 21 2023 Cool and dry conditions with lighter winds are expected through the remainder of the week as high pressure builds over the region.
The extent of these winds are dependent on how quickly the high across the eastern U. As this high moves eastward this weekend, the gradient will start to relax somewhat, but it will continue to possibly be breezy at times throughout the weekend.
Dew points are still around 60 degrees, which when combined with the lower temperatures and elevated winds, has kept conditions on the cooler side for the Florida Keys. High pressure over the eastern U. The high will be planted across the Eastern Seaboard and no increase in moisture is expected for this afternoon, so the forecast is on track, with 10% PoPs and breezy conditions continuing. From synopsis, high pressure will remains parked over the Eastern Seaboard this afternoon, promoting fresh to occasionally strong northeast to east breezes across the Florida Keys. As the area of high pressure weakens slightly and slides northeastward late in the week through the weekend, breezes will modestly slacken.
Warmer temperatures Friday. Expecting lows to be a few degrees warmer than this morning but still below NBM guidance which has been running to warm the last few days. The dry air mass in place will cool quickly but more cloudiness overnight and the warmer temperatures today will keep lows from being as cold as this morning. The upper ridge flattens out with zonal flow tonight and Friday. Temperatures Friday slightly warmer than today. Went close to NBM guidance rather then as warm as MET/MAV guidance with expected cooler lows and some cloud cover Friday morning.
218 PM EST Thu Dec 21 2023 (This afternoon through Friday) High pressure remains centered over the CWA through the short term outlook. Have kept dewpoints low at the higher elevations today and tomorrow due to the dry layer present in this morning's sounding. Also went for the lower end of dewpoints across Central GA this afternoon in line with yesterday's performance. Lows tonight and tomorrow night may not drop below freezing for much of the area, however low-lying areas may see freezing temperatures and cold-air funneling with the light winds. Have elected to not included frost in the forecast, however low lying open areas may see lows at or just below freezing.
106 PM EST Thu Dec 21 2023 A stalled frontal boundary will remain draped across northern IN/OH this afternoon as the center of a high pressure moves into Quebec. A low pressure system will develop along this frontal boundary and lift out of the central plains tonight bringing increasing VFR clouds to southeast Michigan. Ceilings are expected to be above 5000 feet today with the lower clouds holding to the north.
There is still some timing issues with when we will see the rain showers coming but what we do know is a cold front will be heading our way on Christmas. Right now just splitting the difference and having the highest PoPs in the afternoon hours. For our post Christmas work week it look like the cold front will not be rushing to get out of the area.
1226 PM EST Thu Dec 21 2023 High pressure maintains dry conditions into Friday night as temperatures moderate.
Only light QPF accumulations are expected thanks to drier air in the lower levels.
221 PM CST Thu Dec 21 2023 Tonight and Friday: Dry weather will continue through the period and temperatures will be warmer than normal. The mid level ridging over our region this afternoon will continue shifting east through Friday as well. The increase in mid and high level clouds tonight will help hold temperatures warmer than normal and despite the increased cloud cover Friday temperatures will top out warmer than normal.
Winds are still light and variable as high pressure still over the Southern Appalchians. High pressure will remain over the southern Appalachians through the period. We'll be warmer today than yesterday and there will be some high clouds around.
Ridge of high pressure remains in place through early Friday.
(Rest of Today) High pressure remains stationed just to east keeping winds light and conditions dry.
159 PM EST Thu Dec 21 2023 Expansive high pressure centered over northern Quebec will extend southwards across our region through Friday.
407 PM EST Thu Dec 21 2023 Expansive high pressure centered over northern Quebec will extend southwards across our region through Friday.
Issued by National Weather Service Billings MT 314 PM MST Thu Dec 21 2023 Afternoon Discussion: Today through Friday night: A quiescent weather pattern will continue under an upper level ridge pattern, with high temperatures running fifteen to twenty- five degrees above normal for this time of year. There is medium (40 percent) confidence Sheridan, Daniels, Roosevelt, and Richland counties will see patchy freezing fog between 08Z and 172 Friday based on some CAM agreement around northeast MT and northwest ND.
704 PM EST Thu Dec 21 2023 Expansive high pressure centered over northern Quebec will extend southwards across our region through Friday.
The parent upper level low is across central KS, and will slowly move east tonight. The unseasonable mild weather will continue through the holiday weekend ahead of stronger upper level low, currently located off the southern CA coast.