Aikyam-Lab/Synoptic-Bench huggingface dataset:
201 AM EDT Sun Oct 29 2023 A series of low pressure systems will ride northeast along a cold front stalled out across the Ohio River Valley tonight through Sunday night, bringing periods of rain to the region. The cold front will move off to the southeast through the day on Monday with a much colder airmass settling into the area for much of the upcoming week. Embedded mid level energy will move back in from the southwest later Sunday and into Sunday night as the cold front sags southeast across our area. Temperatures will not recover all that much during the day on Sunday with highs ranging from the upper 40s northwest to the low 60s in the southeast. Cloud cover will decrease along with winds, allowing for temperatures to drop below freezing and for frost to develop.
After a cold start to the morning, temperatures will climb above freezing in most valleys.
121 AM EDT Sun Oct 29 2023 Following the passage of a cold front, much cooler temperatures have filtered into the area.
Dry weather with well above normal temperatures will occur today as 500 mb high pressure centered over Florida reigns but begins to cede control. Tonight, a cold front will work from north to south through the BRO CWFA, dropping low temperatures to well below normal levels and generating mainly scattered convection.
The center of cold high pressure originating from Canada has settled over the northern Rockies and spread eastward into the Great Lakes region. Clouds will decrease tonight through Monday as the western high pressure extends a bit farther east, again allowing lows tonight to drop into the 20s area-wide with potentially a few lows into the upper teens in central MN.
The exception was over our far northwest areas where a cold front had dropped temps into the 60s. The cold front will stay northwest of Nashville. Sunday will bring a good deal of clouds as the cold front continues to ooze slowly southeastward. As mentioned in the previous discussion, the big changes will come Sunday night through Monday night as colder air pushes deeper into the area, and rain expands along and after the cold frontal passage. (Rest of today through Sunday) Surface boundary has already entered northwest Middle Tennessee, as evidenced by a wind shift and cooler temperatures than the rest of the mid state.
208 AM MDT Sun Oct 29 2023 Key Messages: - Isolated light snow showers today - Breezy northwesterly winds today and Monday - Trending seasonable through the week Upper trough axis extends from Hudson Bay southward into the southwestern US; further upstream a highly amplified ridge is building immediately off the west coast. Snow will taper off this afternoon as large- scale subsidence overspreads the region behind the upper trough axis.
254 AM MDT Sun Oct 29 2023 The cold front is currently located just south of I-70 and it will continue to drift southward today. The trough axis driving the front will track over the area this morning and cross the Divide this afternoon. The potential for moderate to heavy snowfall will persist along the cold front. Highs will be cooler today thanks to the new airmass. Temps begin to moderate tomorrow as the trough moves over the central US and ridging takes places along the West Coast. Tomorrow night is expected to be chilly once again, but slightly warmer than tonight. Over the next few days the expansive ridge out west gradually pushes eastward.
The lingering flakes should taper off with more breaks in the clouds today as a cold front and high pressure system approaches out of Canada.
1100 PM MDT Sat Oct 28 2023 Key messages: - Cold continues tonight and Sunday - Trending warmer and mainly dry this week Bands of light snow/flurries continue to decrease in coverage and intensity this afternoon. An upper trough extending from Hudson Bay is crossing the forecast area this afternoon as indicated by subsidence behind the trough axis clearing clouds from northwest to southeast. Temperatures on Sunday will continue to be much cooler than average and a tightening of the surface pressure gradient will lead to breezy/windy conditions, especially on the plains to the east of the Black Hills.
Clouds and cold air advection will keep temperatures below normal and only reach into the low 30s this afternoon. Winds will shift to the northwest and become light due to high pressure moving over the area. Mostly clear skies continue tomorrow with winds shifting to the south by the afternoon as the area of high pressure moves southeast of the area. Very cold conditions are expected overnight with lows ranging from the lows teens across west central Kansas to low 20s across south central Kansas. Dry conditions are expected throughout the week as a long wave trough treks east of the area with ridging building across the western United States.
(Today through Monday night) Light freezing rain showers are developing in the Texas Panhandle as of time of writing, as well as some freezing mist. Therefore, there is some concern about leftover precipitation re-freezing Sunday night. especially considering quite a bit of the western half of the Panhandles may not make it above freezing at all Sunday.
- Wind chills Monday morning will be cold, in the lower tens.
215 AM MDT Sun Oct 29 2023 - Storm winding down today with snow diminishing from north to south - Coldest night of the season tonight with clearing skies with single digit readings - Mid-week moderating temperature trends get us back to and above early November averages Water vapor imagery showing upper trof axis stretching across eastern Utah and Southwest Wyoming and slowly moving southeast. Ahead of the trof, the 120kt jet axis is aligned southwest to northeast across east central Colorado. The trof axis will move southeast across the state during the day with subsidence and drying spreading behind the trof this afternoon and evening.
A dry northerly flow aloft will continue through Sunday as a high-amplitude upper ridge resides off the west coast. Highs on Sunday are expected to be slightly warmer, although still 5 to 10 degrees below normal. Sunday will see little change in the air mass at lower elevations while a building upper ridge will bring some warming to the mountains. The high amplitude ridge builds onto the coast on Monday, bringing further warming at all elevations while keeping dry weather over the area.
1152 PM CDT Sat Oct 28 2023 A cold front currently draped along the I-40 corridor will remain nearly stationary through Sunday afternoon, allowing for showers to persist north of the boundary. By Sunday evening, an approaching upper level trough will provide enough energy to push the stalled front into Mississippi. ANS A strong cold front is making its way slowly across the Midsouth and will eventually usher in an early season Arctic airmass across the region.
(Today) Mostly clear conditions early this morning across the region have allowed temperatures to slip back into the upper 50s in northeast Alabama to the low/mid 60s elsewhere. Broken to overcast skies aren't too far away across portions of western and middle Tennessee along/ahead of a slow-moving cold front. Ample sunshine and breezy southwest flow will once again push high temperatures into the low to mid 80s (a few degrees below record highs for the date).
Notable aspect of the tonight forecast will be a strong cold front that moves through the area. Dewpoints are forecasted to drop to the lower 30s late tonight and then into the low 20s by Monday afternoon. Highs Monday in the lower 40s.
(Today through Monday) Surface cold front slowly moving into mid state region this morning and is expected to take its time pushing eastward remainder of today through evening hours tonight. Highs today will reflect expected slow movement of surface cold frontal system, ranging mid 60s northwest to around 80 south.
1220 AM EDT Sun Oct 29 2023 Another period of rain returns tonight and continues at times through Sunday night as a low pressure system passes by the area.
Another wave of rain comes in late in the afternoon and hangs on well into tonight as the broad cold front edges farther south.
224 AM EDT Sun Oct 29 2023 Strong high pressure will persist over the forecast area into this weekend, generating above normal temperatures and dry conditions. High pressure centered over Georgia and South Carolina will guarantee another quiet evening and overnight period. High pressure aloft over the Southeast U. Expect highs in the lower to mid 80s with a few upper 80s possible.
Only slight chance pops warranted on Sunday and Sunday night after that wave on the front goes by, but mostly cloudy skies lingering with highs Sunday stuck in the 40s and lows Sunday night dipping to near freezing. Snow showers will then continue late Tue and Tue night as the upper low is forecast to track just south of the area. Winds will end up from the NW a bit once the system moves by, and before high pressure ends the lake effect. Some locally higher amounts will be possible across the higher terrain of Central Lower, and any location that sees some locally heavy snow showers. Ground sfc temps around 50F and a lack of duration of below freezing temps will limit accumulation potential.
The upper ridge will hold more day before a strong cold front pushes through the area on Monday. Highs today will be in the lower to middle 80s under mostly sunny skies. The cold front will reach Marion and Winston counties before sunrise, and quickly track southeast during the day Monday.
A combination of a flattened low level ridge and an incoming undulation in the easterly flow is keeping the Florida Keys under a northeast to east wind regime. One pocket is passing through the Straits of Florida just offshore of the Lower Keys with KBYX showing a broken band of showers in association. From synopsis, a potent high pressure system centered over the eastern United States will maintain fresh northeast to east breezes across the coastal waters of the Florida Keys today.
Drier and much colder weather arrives overnight bringing sub-freezing temperatures to a good chunk of central Illinois.
614 AM CDT Sun Oct 29 2023 (Today and tonight) As of 4 AM, the cold front was moving south through the Concho Valley and Heartland.
Temperatures gradually warm throughout the week as the upper level ridge slowly builds in.
A cold front will move through the Mid-South today and tonight.
Area wide snow continues early this morning from the I-25 corridor and to the west, as the main upper trough is just to the west and broad southwesterly flow is in place. Road conditions are already hazardous and will worsen with time with much of the I-25 corridor and portions of the Highway 50 corridor into the Mid Ark Valley impacted through midday. While freezing rain and/or sleet hasn't been observed, do think isolated areas of light freezing rain or freezing drizzle along with a light glaze of ice could be possible through mid morning. Main upper trough will continue to shift east of the area at the start of the period. This trend will continue through mid week, as some weak ridging aloft is noted across the region.
Broad high pressure remains over the southeast U. High pressure over the southeast U.
With the shallow surface frontal boundary now over most of northeast Texas as of this Sunday morning, parallel mid- to-upper level southwesterly flow will continue to focus overrunning precipitation over this area until enough surface ridging spills across the Great Plains to push the boundary across the rest of the area by tonight. /16/ (Monday Night through Sunday) Elevated precipitation lingering behind a cold front will be mainly confined to areas along and south of I-20 at the start of the long- term period on Monday night.
Unseasonably cold temperatures near freezing or colder will continue all day Sunday, with elevated north winds keeping wind chills very uncomfortable, in the teens to near 20 degrees. Clouds and cold air advection will keep temperatures below normal and only reach into the low 30s this afternoon. Winds will shift to the northwest and become light due to high pressure moving over the area. Mostly clear skies continue tomorrow with winds shifting to the south by the afternoon as the area of high pressure moves southeast of the area. Very cold conditions are expected overnight with lows ranging from the lows teens across west central Kansas to low 20s across south central Kansas. Dry conditions are expected throughout the week as a long wave trough treks east of the area with ridging building across the western United States.
Dry weather with mild overnight temperatures -which I'll define as the mid-30s to low-40s west of the Cascades and from mid-20s to low-30s east of the Cascades- and warmer afternoons is expected through mid-week.
Showers and thunderstorms are currently (as of 4am) on a line from Brownfield to Dickens to Childress moving northeastward along a strong cold front. Temperatures will continue to fall through the morning and rain will gradually changeover to freezing rain as surface temperatures drop below freezing with temperatures aloft remaining above freezing. Freezing rain will gradually taper to freezing drizzle and end from northwest to southeast this afternoon/evening as high pressure developing over eastern Colorado will allow for more cold, dry air to push out the moisture.
(Now through Monday) An upper ridge across the southern states will weaken and shift southward today into Monday as a large upper trough moves east across the plains. Ahead of this trough, a cold front will move into the southeast states later today and through the area early on Monday. Highs today will again climb into the low to mid 80s. Highs Monday will range from the low/mid 70s northwest of I-65 to low to mid 80s southeast of I-65.
The cooler readings are currently forecast across Yuma county where higher lingering snow depth is expected. Low temperatures generally in the lower to upper teens with wind chill readings in the single digits above zero.
Trough over the Great Basin Region will push eastward over the eastern Rockies today, as high pressure ridge from the eastern Pacific begins to build over NorCal.
738 AM EDT Sun Oct 29 2023 Aviation - Rain early today with a break during daytime Cold front continues to move eastward today. Light showers continue to stream from the southwest to the northeast across the lower peninsula. So while there is copious amounts of mid level moisture, which is a good indication of clouds, there will be enough dry air in the low levels to not allow for rain this afternoon and through the early evening. A deepening trough extending from across southern Canada through the intermountain west will swing through the midwest and the Great Lakes tonight into tomorrow.
Ceilings lower to MVFR with this system with a low chance for IFR cigs/vis late tonight as winds back to northwest with the passage of a cold front. Notable aspect of the tonight forecast will be a strong cold front that moves through the area. Dewpoints are forecasted to drop to the lower 30s late tonight and then into the low 20s by Monday afternoon. Highs Monday in the lower 40s.
A gradual warming trend will take hold over the region this week as high pressure builds back into the western US. It feels downright frigid out there behind the dry cold front that passed through our region yesterday, with low temperatures bottoming out in the low 20s for even the warmest valleys across western Nevada and the single digits to teens in Sierra valleys. This afternoon won't bring too much relief from the cold, with temperatures similar to those observed yesterday, though perhaps a few degrees warmer. High pressure building into the region on Monday, however, will allow us to thaw out for the remainder of the week. Light winds and more limited mixing also prevail under high pressure the first half of the week with stronger valley inversions and subsequent hazy conditions.
An upper level ridge begins to make its way into the western U. Today through Monday The low pressure trough moves east out of the state being replaced by an upper level ridge making its way over the western U.
523 AM MDT Sun Oct 29 2023 Key Messages: - Isolated light snow showers today - Breezy northwesterly winds today and Monday - Trending seasonable through the week Upper trough axis extends from Hudson Bay southward into the southwestern US; further upstream a highly amplified ridge is building immediately off the west coast. Snow will taper off this afternoon as large- scale subsidence overspreads the region behind the upper trough axis.
445 AM CDT Sun Oct 29 2023 (Today through Monday afternoon) Upper trough extends from Canada down across the Northern Plains to the 4 Corners Region. This trough will swing east today and Monday as a ridge grows across the west.
442 AM CDT Sun Oct 29 2023 Current surface analysis places high over the northern Rockies with ridge extending over the Black Hills into the upper Midwest. To the north, a weak trough is noted just north of the international border. Upper level analysis shows a broad trough dropping through the northern plains, over the central Rockies, and into the desert southwest. For today, a little light snow may linger over western areas this morning as the aforementioned upper trough continues to drop through. Cooler air then tries to push back into the area to close out the week.
Anomalously cold temperatures remain in place through the early week period behind a reinforcing cold front. A building ridge of high pressure will result in gradually warming temperatures by midweek.
615 AM CDT Sun Oct 29 2023 (Today through Monday night) Light freezing rain showers are developing in the Texas Panhandle as of time of writing, as well as some freezing mist. Therefore, there is some concern about leftover precipitation re-freezing Sunday night. especially considering quite a bit of the western half of the Panhandles may not make it above freezing at all Sunday.
500 AM MDT Sun Oct 29 2023 The cold front is currently located just south of I-70 and it will continue to drift southward today. The trough axis driving the front will track over the area this morning and cross the Divide this afternoon. The potential for moderate to heavy snowfall will persist along the cold front. Highs will be cooler today thanks to the new airmass. Temps begin to moderate tomorrow as the trough moves over the central US and ridging takes places along the West Coast. Tomorrow night is expected to be chilly once again, but slightly warmer than tonight. Over the next few days the expansive ridge out west gradually pushes eastward.
(Today and tonight) As of 4 AM, the cold front was moving south through the Concho Valley and Heartland.
710 AM CDT Sun Oct 29 2023 A cold front will move through the Mid-South today and tonight.
The upper ridge will hold one more day before a strong cold front pushes through the area on Monday. Highs today will be in the lower to middle 80s under mostly sunny skies. The cold front will reach Marion and Winston counties before sunrise, and quickly track southeast during the day Monday.
632 AM CDT Sun Oct 29 2023 (Today through Monday) Surface cold front slowly moving into mid state region this morning and is expected to take its time pushing eastward remainder of today through evening hours tonight. Highs today will reflect expected slow movement of surface cold frontal system, ranging mid 60s northwest to around 80 south.
Current surface analysis places high over the northern Rockies with ridge extending over the Black Hills into the upper Midwest. To the north, a weak trough is noted just north of the international border. Upper level analysis shows a broad trough dropping through the northern plains, over the central Rockies, and into the desert southwest. For today, a little light snow may linger over western areas this morning as the aforementioned upper trough continues to drop through. Cooler air then tries to push back into the area to close out the week.
531 AM CDT Sun Oct 29 2023 (Today) Mostly clear conditions early this morning across the region have allowed temperatures to slip back into the upper 50s in northeast Alabama to the low/mid 60s elsewhere. Broken to overcast skies aren't too far away across portions of western and middle Tennessee along/ahead of a slow-moving cold front. Ample sunshine and breezy southwest flow will once again push high temperatures into the low to mid 80s (a few degrees below record highs for the date).
Water vapor imagery showing upper trof axis stretching across eastern Utah and Southwest Wyoming and slowly moving southeast. Ahead of the trof, the 120kt jet axis is aligned southwest to northeast across east central Colorado. The trof axis will move southeast across the state during the day with subsidence and drying spreading behind the trof this afternoon and evening.
A dry cold front will bring gusty northeast winds, clear skies, and colder temperatures to northern Arizona for today and Monday. Temperatures warm with conditions remaining dry for the rest of the week as high pressure builds towards the west. Sunny skies prevail across the region this morning, behind a cold front that swept through overnight.
205 PM EDT Sun Oct 29 2023 A mix of predominately MVFR/VFR skies exists this afternoon under mostly dry conditions with MVFR ceilings holding on across the southern Metro terminals with the lower inversion heights. Winds will also be backing towards the northwest with the passage of a cold front tonight. Notable aspect of the tonight forecast will be a strong cold front that moves through the area. Dewpoints are forecasted to drop to the lower 30s late tonight and then into the low 20s by Monday afternoon. Highs Monday in the lower 40s.
Upper level ridge remains to west of Idaho with strong northerly flow aloft keeping very cold air in place with clear skies.
Gusty winds across central Nevada will subside tonight as a low pressure trough moves away from the region. A building high pressure ridge will bring quiet weather and warming temperatures through midweek. A weakening ridge and increasing Pacific moisture is expected bring more clouds and some rain and high mountain snow to northern Nevada for the latter part of the week with mild temperatures remaining. Tonight through Monday night Long wave pattern evolution will support a building broad ridge of high pressure over the region through midweek. Lows tonight will be quite cold however, falling into the lower teens and some single digits in valleys across eastern Nevada.
156 PM MDT Sun Oct 29 2023 An upper level ridge slowly building into the area will promote dry conditions early this week, along with gradually moderating temperatures.
1226 PM CDT Sun Oct 29 2023 (Today through Monday afternoon) Upper trough extends from Canada down across the Northern Plains to the 4 Corners Region. This trough will swing east today and Monday as a ridge grows across the west.
1239 PM CDT Sun Oct 29 2023 (Today through Monday night) Light freezing rain showers are developing in the Texas Panhandle as of time of writing, as well as some freezing mist. Therefore, there is some concern about leftover precipitation re-freezing Sunday night. especially considering quite a bit of the western half of the Panhandles may not make it above freezing at all Sunday.
1003 AM MDT Sun Oct 29 2023 Temperatures have begun to warm above freezing across Colorado Zone 007, including the cities of DeBeque, Silt, and Rifle. The cold front is currently located just south of I-70 and it will continue to drift southward today. The trough axis driving the front will track over the area this morning and cross the Divide this afternoon. The potential for moderate to heavy snowfall will persist along the cold front. Highs will be cooler today thanks to the new airmass. Temps begin to moderate tomorrow as the trough moves over the central US and ridging takes places along the West Coast. Tomorrow night is expected to be chilly once again, but slightly warmer than tonight. Over the next few days the expansive ridge out west gradually pushes eastward.
Temperatures will remain above freezing and no travel impacts expected.