Aikyam-Lab/Synoptic-Bench huggingface dataset:
1148 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.
(This evening through Saturday Night) As upper level ridging shifts eastward, flow aloft becomes increasingly southwesterly over the ArkLaTex, helping to fuel the return of showers and setting up the beginnings of a soggy weekend. Guidance suggested frost development for our northeast but unless clouds ern zones, Have following guidance trends indicating our warmest lows in the upper 30s and lower 40s in deep east Texas, ranging to near or just below freezing in southwestern Arkansas and north central Louisiana, which will have the longest window of opportunity to cool before clouds arrive.
1251 PM EST Fri Dec 6 2024 Remaining cold and gusty in the mountains; a bit warmer in the lowlands.
Plenty of sun again on Saturday with high pressure still in place.
Also received a spotter report of freezing drizzle between RHI-TKV, and seeing UP on the RHI observation. Have added some freezing drizzle to the forecast for a couple hours and issued a Special Weather Statement for locally hazardous travel conditions in NC WI. After any snow ends, Saturday should have the mildest weather in the last ten days, as gusty southwest winds bring up warmer air.
And the low for the day for everybody will occur just before midnight tonight. Why? Well, a cold front cleared the region last night and colder air is rushing in from the north. Ample sunshine helps "warm" us into the lower to middle 50s for mid-afternoon highs today.
1022 AM EST Fri Dec 6 2024 Low pressure will lift north across Labrador today. High pressure will build in from the west tonight and crest over area Saturday.
High temperatures will struggle to warm out of the lower teens - Chance for isolated snow showers to start the week. This cloud layer will limit our temperatures, allowing us to stay on the cooler side today with highs in the upper 20s and lower 30s.
We're already seeing several locations across the Valley rise above freezing, but they'll quickly drop back below the freezing line after sunset. with overnight lows only a few degrees warmer than this mornings temps.
(Rest of Today) High pressure will remain dominant today, centering over the Tennessee Valley.
1245 PM EST Fri Dec 6 2024 Low pressure will lift north across Labrador today. High pressure will build in from the west tonight and crest over area Saturday.
The lighter caa tonight will allow for decent radiational cooling sending all but our southwest back below freezing.
Surface analysis places a frontal boundary draped across central Florida, with decaying high pressure centered just to the east of South Florida. From synopsis, high pressure continuing to slide eastward in the North Atlantic, as well as a frontal boundary approaching the Florida Peninsula, will promote light to gentle northeast to east breezes this afternoon. The weak front will push through the Keys coastal waters tonight, with high pressure building across the Southeast in its wake.
1242 PM EST Fri Dec 6 2024 Cold weather will last through Saturday as Canadian high pressure moves across the region.
(Tonight) High pressure will continue to dominate the forecast locally overnight, keeping the cold and dry airmass in place.
1043 AM CST Fri Dec 6 2024 (Rest of Today) High pressure will remain dominant today, centering over the Tennessee Valley.
956 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.
1008 AM EST Fri Dec 6 2024 Cold weather will last through Saturday as Canadian high pressure moves across the region.
But, toward Saturday morning, a warm frontal passage would likely lift and at least partially mix these lower ceilings with some improvement in conditions to mainly MVFR.
Owing to the compounded effects of yesterday's cold frontal passage and an airmass that originated across northern Manitoba, today's highs will be quite cold -- in just the lower 30s to near 50 -- as much as 10 to 19 degrees below average. Highs tomorrow will thus be in the 50s, some 8-12 degrees warmer than today, but still on the cool side for early December. Despite the pocket of driest air at the mid-levels moving offshore, subsequent Fire Danger Statement issuance for tomorrow afternoon is possible, primarily along the AL/GA border and across our far southern tier, with forecast relative humidity values in the low-to- mid 20 percent range.
335 PM CST Fri Dec 6 2024 - Freezing Drizzle is possible in NE ND and NW MN this afternoon and evening. - Freezing rain and snow are expected to impact the Northwestern Angle and parts of Lake of the Woods tonight into Saturday morning.
438 PM EST Fri Dec 6 2024 High pressure will build across the region later tonight through Saturday.
300 PM MST Fri Dec 6 2024 - Dry and warmer than normal conditions will persist through Saturday afternoon.
402 PM CST Fri Dec 6 2024 (Tonight) High pressure will continue to dominate the forecast locally overnight, keeping the cold and dry airmass in place.
(Tonight) High pressure was situated along the lower MS River valley.
401 PM MST Fri Dec 6 2024 - Dry and warmer than normal conditions will persist through Saturday afternoon.
The fog and low clouds are stubborn to burn off in these areas, which could be a result of the high clouds moving in from the west to northwest. The higher passes should be okay with no snow accumulation during the day Saturday, but could not rule out up to an inch around Diamond Lake Saturday night. Meanwhile winds will increase Saturday afternoon east of the Cascades with wind gusts over the higher ridges pushing 40-45 kts. The upper trough will move in behind the front Saturday evening and night with precipitation becoming showery and gradually diminishing in intensity and coverage.
632 PM EST Fri Dec 6 2024 Remaining cold and gusty in the mountains; a bit warmer in the lowlands.
337 PM CST Fri Dec 6 2024 Forecast discussion for routine afternoon forecast issuance - A mix of light snow, sleet and freezing rain may result in locally hazardous travel conditions across far northern and northeast WI late tonight into Saturday morning.
513 PM CST Fri Dec 6 2024 Updated aviation portion for 00Z TAF issuance - A mix of light snow, sleet and freezing rain may result in locally hazardous travel conditions across far northern and northeast WI late tonight into Saturday morning.
High pressure remains in place with afternoon satellite showing relatively clear skies as we remain under the influence of high pressure. This changes during the day tomorrow however as an upper level trough moving into the PacNW will push the ridge to the south, ending our streak of dry weather and above normal temps, replacing it with clouds, precip and cooler temps once again. Before that happens though, we'll have one more night with high pressure in place and the stagnant airmass will lead to another night of fog around Bear Lake and much more localized fog around Pocatello airport and into Arbon Valley. Clouds will be on the increase by late Sat AM as we start to feel the influence of the aforementioned trough and by late evening, the area should be seeing widespread cloud cover.
The 850mb ridge will center over the Gulf of Mexico tomorrow, reorienting low to mid level flow from the west-southwest vs north to northwest as they are currently.
532 PM CST Fri Dec 6 2024 (This evening through Saturday Night) As upper level ridging shifts eastward, flow aloft becomes increasingly southwesterly over the ArkLaTex, helping to fuel the return of showers and setting up the beginnings of a soggy weekend. Guidance suggested frost development for our northeast but unless clouds ern zones, Have following guidance trends indicating our warmest lows in the upper 30s and lower 40s in deep east Texas, ranging to near or just below freezing in southwestern Arkansas and north central Louisiana, which will have the longest window of opportunity to cool before clouds arrive.
Expect lows to be several degrees warmer than last night. Plenty of sun again on Saturday with high pressure still in place.
A cold front continues advancing southward across the peninsula this evening, with a diminishing band of associated clouds continuing to progress south across SWFL and interior central and southern areas. Cooler and drier air along with mostly clear skies have already pushed into the Nature Coast and parts of WCFL, where temps are already 5-15 degrees cooler compared to 24 hours ago. A Freeze Warning remains in effect tonight for inland Levy County where temps are expected to dip to freezing or just below. Spotty areas of coastal Levy and northern Citrus counties may also flirt with freezing temps. 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.
Expect lows to bottom out in the mid 20s generally north of the Highway 84 corridor with upper 20s to low 30s across the rest of our inland communities and mid to upper 30s along the immediate coastline. Communities north of I-10 should brace for approximately 9-13 hours of temperatures at or below freezing tonight. Tomorrow will features slightly (emphasis on slightly) warmer temperatures than today as highs top out in the 50s inland with low 60s at the beaches. Despite the calm conditions on Saturday night, overnight lows will be a solid 8-10Â° warmer than tonight given the increasing cloud cover and increasing moisture levels.
946 PM MST Fri Dec 6 2024 - Dry and warmer than normal conditions will persist through Saturday afternoon.
Breezy conditions expected tonight in the higher terrain of our Virginia counties. Highs will remain below seasonal norms today, but should be some 5-10 degrees warmer than yesterday across the board.
A look at early morning water vapor imagery depicts northwest flow aloft across the Upper Midwest and a cut-off low over northern Mexico and southern AZ/NM, leaving our area in between these two features. Another closed low is noted off the coast of northern British Columbia. At the surface, high pressure has moved southeast and is now centered over the Deep South, while low pressure sits in Manitoba, again leaving Kansas in between the two. Low-level southwesterly flow will keep warmer air in place through the weekend with forecast highs in the upper 50s to low 60s both today and tomorrow.
This is reasonable, as a weak east-west surface pressure gradient should develop ahead of the approaching cold front, due Saturday night. A light wintry mix of snow and freezing rain possible Saturday night.
359 AM EST Sat Dec 7 2024 High pressure south of the region will keep the area dry with a warming trend through the weekend.
943 PM CST Fri Dec 6 2024 Updated aviation portion for 06Z TAF issuance - A mix of light snow, sleet and freezing rain may result in locally hazardous travel conditions across far northern and northeast WI late tonight into Saturday morning.
Temperatures should begin to moderate some in the early hours of the morning as a trough near the Four Corners region will push the high southeast of the area and southerly flow returns.
Water vapor imagery highlights a nearly closed low near the AZ/MX border. A broad band of westerlies covers the Gulf of Mexico and is nearly parallel to a cold front limping through south-central Florida. A weak front will push through the Florida Keys coastal waters tonight, with high pressure building across the Southeast in its wake.
1114 PM CST Fri Dec 6 2024 (Tonight) High pressure was situated along the lower MS River valley.
223 AM EST Sat Dec 7 2024 Upper trough continues to move into the W Atlantic today as weak upper ridging develops in the W Gulf. Large high pressure area at the surface to keep the cold and dry airmass in place today through tonight with frost possible over the N Nature Coast tonight.
This was partially in response to another upper low forecast to form across Alberta/Saskatchewan this weekend, and joining with an upper low moving from the Desert SW to the Mid Mississippi Valley. At the surface, high pressure situated over this region was continuing to produce a cold snap across the greater Tennessee Valley. With clear skies, light winds, and excellent radiational cooling, 2 AM temperatures have chilled into the low/mid 20s, after highs Friday only in the upper 30s and lower 40s. With generally sunny skies expected and cold air advection ceasing, high temperatures later today should rise into the lower 40s, with SW winds around 5 mph.
Main hazards include freezing rain accumulations and snow creating slick conditions to cause travel conditions to be hazardous. Late tonight, our low pressure system starts to push its way into North Dakota and start to develop our next winter event for the Northern Plains. Simultaneously, another low pressure system is passing through the south that will disrupt our inflow of moisture from the gulf but will still likely tap into some pacific moisture to keep us saturated as it moves through.
Winds have already begun to increase as high pressure situated across the Southeast builds in across the region in the wake of the frontal boundary. Temperatures are in the lower to mid 60s and dew points are in the lower 60s, making for another cool and comfortable early December morning. This high will quickly slide southwards, and eventually eject off of the SE coast into the western North Atlantic during the day on Sunday.
Highs will again be well above normal, reaching the low to mid 50s for most spots, and maybe a few degrees cooler along the Highway 20 corridor.
Temperatures will warm back to seasonal norms Sunday with highs in the low 60s. Meanwhile, a building upper ridge over the Pacific NW will force Baja energy to eject across the southern plains later Sunday.
Rain chances will range from 20-50% Today with the higher probables across our northern counties. A warm front will lift north through the forecast area early Sunday, with warmer and drier conditions in its wake. Can't rule out some reduced visibilities overnight tonight due to drizzle and low ceilings as the warm front approaches.
507 AM CST Sat Dec 7 2024 (Today through Sunday Night) Cool temperatures are in place across much of the state this morning as sfc ridging remains over the area. No rain is expected today but clouds and moisture will continue increase from the S/SW as the SW H500 cyclone finally lifts northeast toward the area.
Mid to late morning a weak cold front is expected to bring some light rain mainly to Humboldt and Del Norte counties with counties farther south and east mainly just seeing clouds and few sprinkles on Saturday.
Breezy conditions expected tonight in the higher terrain of our Virginia counties. Highs will remain below seasonal norms today, but should be some 5-10 degrees warmer than yesterday across the board. Lastly, although not impactful, the only other item of interest will be potential for windy conditions in the higher terrain of our Virginia counties tonight. However it definitely looks breezy along the ridgetops this evening and tonight, especially for those areas in Russell and Washington counties in Virginia, so will need to see how model trends progress and monitor whether we may need some headlines there.
These disturbances in the main jet flow will be well ahead of the actual cold front.
Warm and mild conditions will continue through the weekend with a brief break in the winds for the lower Colorado River Valley Sunday.
636 AM EST Sat Dec 7 2024 High pressure south of the region will keep the area dry with a warming trend through the weekend.
A look at early morning water vapor imagery depicts northwest flow aloft across the Upper Midwest and a cut-off low over northern Mexico and southern AZ/NM, leaving our area in between these two features. Another closed low is noted off the coast of northern British Columbia. At the surface, high pressure has moved southeast and is now centered over the Deep South, while low pressure sits in Manitoba, again leaving Kansas in between the two. Low-level southwesterly flow will keep warmer air in place through the weekend with forecast highs in the upper 50s to low 60s both today and tomorrow. As we go through the day Sunday, the upper low currently to our southwest will make its way across southeast KS and through the Ozarks, which keeps rain chances south and east of the area.
This was partially in response to another upper low forecast to form across Alberta/Saskatchewan this weekend, and joining with an upper low moving from the Desert SW to the Mid Mississippi Valley. At the surface, high pressure situated over this region was continuing to produce a cold snap across the greater Tennessee Valley.
949 AM EST Sat Dec 7 2024 High pressure remains in control through Sunday night.
High pressure will continue today, and has once again created widespread dense fog in the Bear Lake basin and localized dense fog in the eastern Magic Valley and Snake River plain. That upper level ridge will begin its break down, caused by an incoming upper level trough that will push a surface cold front through the forecast area starting early this evening and continuing into Sunday night. The same is true for the Snake River plain, especially the lower end. The upper level ridging appears to be possibly short-lived as there is a 60-plus percent chance of another trough on Thu/Thu night. By Fri the flow is more zonal and the trough is gone from all clusters. Expect near normal lows and afternoon highs 5 to 10 deg F above normal for Tue and Wed, then a leveling off with the approaching trough.
600 AM EST Sat Dec 7 2024 (Today through Sunday) A weak cold front emanating from an area of low pressure over eastern Canada is moving across South Florida this morning. Drier, cooler air in the wake of the front will provide for a rain-free weekend. Maximum temperatures on Saturday will be a few degrees cooler ranging from the mid to upper 70s. Temperatures on Sunday will be a few degrees warmer than Saturday with a maximum in the upper 70s across most of the area.
Quiet and dry weather is expected for the weekend, with a cold front moving across the forecast area.
High temperatures will struggle to warm out of the lower teens. With the upper trough from earlier in the week continuing to move out, a milder Pacific airmass is advancing in. This should translate to highs in the low to mid 40s and upper 40s to lower 50s, respectively, given the high clouds and weak sun angle. Records today are in the low to mid 50s.
525 AM CST Sat Dec 7 2024 (Today through Sunday Night) All is calm early this morning with high pressure centered over the area. With this warmer air and plenty of sunshine, temperatures will warm into the upper-40s to low-50s by this afternoon.
Southerly winds will start to bring some warmer temps to the region with highs in the 40s expected for most of the Valley. Breezy conditions expected tonight in the higher terrain of our Virginia counties. Highs will remain below seasonal norms today, but should be some 5-10 degrees warmer than yesterday across the board. Lastly, although not impactful, the only other item of interest will be potential for windy conditions in the higher terrain of our Virginia counties tonight. However it definitely looks breezy along the ridgetops this evening and tonight, especially for those areas in Russell and Washington counties in Virginia, so will need to see how model trends progress and monitor whether we may need some headlines there.
1005 AM EST Sat Dec 7 2024 High pressure south of the region will keep the area dry with a warming trend through the weekend.
1144 AM CST Sat Dec 7 2024 (Today through Sunday Night) Cool temperatures are in place across much of the state this morning as sfc ridging remains over the area. No rain is expected today but clouds and moisture will continue increase from the S/SW as the SW H500 cyclone finally lifts northeast toward the area.
We are seeing southerly flow and that is bringing a big change in our temperatures, they are running 13-17 degrees warmer than yesterday this time. A short wave trough will be lifting out of the Four Corners region on Sunday.
High pressure will remain in place through the afternoon supporting clear skies and calm winds allowing temps to heat up into the upper 40s and lower 50s across the TN Valley. This evening, clouds will begin to build in from the SW ahead of our next system amounting to a warmer night than the last several.
(This evening through Sunday Night) This evening will see renewed rounds of rainfall tracking into the ArkLaTex out of central and southeast Texas, driven by westerly and southwesterly flow aloft, on the western periphery of an upper level ridge whose axis is pushing east over the lower Mississippi Valley. Meanwhile, a deep upper level trough and associated closed low over eastern New Mexico and west Texas will eject northeastward from the eastern Rockies over the Great Plains tonight and through the day Sunday. The low looks to weaken while the trough loses its definition, and while these features will be deteriorating, they will serve to maintain our southwesterly flow regime aloft, resulting in areawide rainfall chances continuing overnight and through the day tomorrow, before starting to come to an end from northwest to southeast for our Oklahoma and Texas zones tomorrow night.
While the low and associated front will not pass through the area until later in the work week, cloud cover associated with the cut off low will begin to infiltrate the area this evening.
Breezy conditions expected tonight in the higher terrain of our Virginia counties. Much warmer tomorrow with highs in the 50s. Discussion: Dry weather expected this period with a weak ridge over the Southeast and high pressure at the surface. Gusty winds will be possible on the highest ridgetops in Southwest Virgina late tonight as 850 mb westerly winds increase to 40 to 45 knots. The higher terrain in Southwest Virginia may see gusts of 35 mph late tonight through early tomorrow morning. Otherwise, a quiet night with clear skies allowing temps to drop into the lower 30s and upper 20s in the Tennessee Valley. Tomorrow will be warmer as southerly flow continues to bring warm, moist air into the region.
Most of the aforementioned clouds line up nicely with where the warmer water of the Gulf Stream is present. With the warmer water of the Gulf Stream and cooler air moving across it, this is helping to generate the showers which is expected to be ongoing through the afternoon. From synopsis, high pressure across the Southeastern U. The high is expected to move off the Southeast U.
1201 PM MST Sat Dec 7 2024 KEY MESSAGES: - Freezing rain remains a threat in northwest Montana through this evening. Given radar returns, precip reports, and temperature profiles, freezing rain remains a concern for that area, and a winter storm warning remains in effect there until 5 PM today. This evening a cold front will pass through the region and wipe out the layer of warm air aloft, causing a transition to all snow. There isn't a lot of moisture to work with behind the cold front, so precipitation amounts are pretty light, though there is concern about showers organizing into bands.
1238 PM EST Sat Dec 7 2024 High pressure hangs across the southeast U.