Aikyam-Lab/Synoptic-Bench huggingface dataset:
/ISSUED 334 AM CST Sat Nov 25 2017/ At 2 AM, high pressure was located over northern Florida and a weak cold front extended from the southern Great Lakes into the Texas panhandle. A warmer start to the day coupled with weak warm air advection should yield warmer daytime high temperatures. Cooler air will lag a bit behind the front and Sunday morning low temps not looking all that cold. Stronger cold air advection develops later Sunday morning and afternoon high temps will be about 5 degrees cooler than today.
Chattanooga Airport, TN 63 38 58 34 / 10 0 0 0 Knoxville McGhee Tyson Airport, TN 61 35 54 32 / 10 0 0 0 Oak Ridge, TN 61 34 54 32 / 10 0 0 0 Tri Cities Airport, TN 60 32 51 30 / 10 10 0 0.
A cold front at 2 AM had crossed south of the Plateau and will continue to move through the remainder of the forecast area by sunrise. No rainfall is expected to reach the ground due to the dry air in the lower levels of the atmosphere. Temperatures will be noticeably cooler today as highs struggle to reach seasonably cool normals compared against yesterdays record high readings.
/issued 326 AM EST Sat Nov 25 2017/ A light northerly drainage flow over the region during the overnight hrs with the low level moisture in place will allow for areas of fog that develop over Central Florida to gradually filter into South FL tonight. Drier air will continue to move into South Florida as high pressure builds over the region. No significant change in temperatures is expected as cooler air remains further north. High temperatures will remain near normal with highs in the low 80s and lows from the upper 50s across the northwestern interior sections to upper 60s across the east coast metro areas. On Sunday, a reinforcing cold front moves through the region with very limited low level moisture.
A cold front will move through the area from 09Z to 14Z this morning.
Lowest ceilings expected in the vicinity of TRI where ceilings may lower to 4000-5000 feet later this afternoon and evening as the cold front moves through. Winds early today will be generally from the west and will shift to the northwest/north later today and tonight as the cold front moves eastward.
/issued 304 AM CST Sat Nov 25 2017/ A cold front will drop south through the region today in the wake of an upper trough traversing the Midwest U. Gusty, northerly winds behind the front will result in cooler temperatures areawide, but readings will still be around 5 degrees above normal for late November both Saturday and Sunday. Winds aloft over the region will be north/northwesterly this weekend due to the persistent presence of an upper ridge over the southwestern CONUS.
Sunday will mimic Saturday, with an upper level ridge keeping the jet stream, and any associated impactful winter weather, well north in Canada.
As the high moves southeast of the area tonight, a south/southwest return flow will set up overnight and continue into Sunday.
/issued 255 AM CST Sat Nov 25 2017/ A modest cold frontal push was underway early this morning with wind speeds around 15 to 20 mph expected to wane before daybreak, then ease upwards again with a bit of deeper mixing. Temperatures cooler today, yet will recover to about 6 degrees above normal for most areas by late afternoon.
Otherwise the main story for the weekend will be the highly amplified upper ridging which will bring record warmth to much of the area by Sunday. Don't see much to hinder these temps from being realized as cloud cover should be minimal and lee troughing should promote downslope westerly flow. It will be breezy west of I-25 both today and Sunday due to the troughing and modest W to NW flow aloft.
1006 AM EST Sat Nov 25 2017 High pressure just to the south will weaken today as offshore low pressure passes well to the southeast.
505 AM CST Sat Nov 25 2017 The cold front has moved through the CWA and stretched across southern IL and southeast MO early this morning, with high clouds skirting the area to the north. Given the dry air mass and good radiational cooling conditions, the lows tonight will likely be a tad lower than MOS and the previous forecast.
605 AM EST Sat Nov 25 2017 A cold front crosses today with limited moisture. Cooler Sunday. Quite a bit cooler in valley locations farther east where the atmosphere decoupled this evening. A cold front will push through today. Have a half inch or less snow accumulation along the higher ridges of the northern mountains. Upper trough exits towards Atlantic Canada, leaving the area under control of high pressure and dry conditions through mid week. Expect 500hPa heights to rebound, along with 850hPa temperatures, resulting an a warmer than normal period for the entire CWA.
A weak cold front will push into central Texas later today, however, allowing wind speeds to decrease into tonight as the gradient weakens. A weak front will advance into central and south central Texas today under a weak mid level trough moving south along the eastern side and outer periphery of a large mid level ridge extending meridionally over the western United States. Tonight, the weak cold front will enter the northern portion of the forecast area with little more than a wind shift and the development of isolated coastal showers late. High pressure over the southern Plains will shift east toward the southeast United States now, as the northern portion of the upstream ridge topples into the midwest, with the southern anchor remains generally over north central Mexico.
Weak high pressure over the area today and some drier air off the surface to burn off/mix out fog mid morning. Secondary dry front to quickly sweep over the area tonight with drier high pressure reinforced Sunday.
Currently, northwest flow aloft as upper level ridging slowly builds west of the Rockies. While still expect low stratus northeast, I did scale back on the aerial coverage a bit based on the last few hours of satellite imagery, and still expect an eastward push this morning/afternoon 15-20Z as a weak warm front moves east across central ND. Upper level ridge off to our west continues to amplify today and tonight. Embedded S/WV impulse moves through the ridge and into the Dakotas early Sunday morning. Lack of a decent mixing wind will keep daytime highs below their potential maxes, but still very mild with highs forecast in the lower 60s southwest. Quite a baroclinic zone/temperature difference from southwest to northeast Sunday with highs in the Turtle Mountain area only in the lower 30s.
Otherwise high clouds will increase this afternoon as a cold front begins to approach the area. afternoon temps still expected to rebound rapidly from near 70 to the lower 70s.
These clouds are a result of some elevated moisture along and ahead of a cold front shifting southeast today, eventually pushing into our area this afternoon. In the meantime, south winds ahead of the front will aid in a quick warm-up today with temperatures warming from the 40s this morning into the lower to mid 70s by this afternoon. The new work week will usher in a warming trend as south winds return and upper ridging builds farther east into the area from the SW.
405 AM CST Sat Nov 25 2017 Mild temps prevailed early this morning, with most of the Midsouth in the 50s, ahead of a Pacific cold front over the southern MO. By afternoon, light winds will accompany the mild temps, with a 1024mb pressure ridge axis centered along the I-40 corridor. Sunshine will continue early the week, as low level southerly winds return in advance of an approaching upper low over the southern plains.
A cold front has moved through the CWA and now resides near the MO/AR border. High pressure will remain over the area tonight before shifting southward Sunday morning.
upper ridge which will rebuild over the desert southwest then translate eastward over the next 24 hours. Temperatures will run 15 to 20 degrees cooler than yesterday across the plains, and around 3 to 6 degrees cooler across the mountains. Winds across the higher mountains will remain breezy as northwest winds mix down during the afternoon. lee trof redevelops which should help enhance westerly surface flow again, resulting in warmer overnight lows along/west of I-25.
Today and Tonight: Early morning surface observations depict an advancing NE/SW oriented cold front stretching from Southern Quebec to the Southern Plains. High temperatures will range from the the mid 60's in the north to the low 70's in the western and southern portions of the area, where cloud cover will be less. A cooler, drier airmass will begin to filter in behind the front.
A cold front was moving through the forecast area at 07Z/1am, and was located from Grand Marais to Staples. These sprinkles or flurries are very short lived as dry air is moving into the region behind the cold front and leading to a gradually clearing sky. Elsewhere, high pressure will be arriving. The high pressure will remain over the region through tonight.
607 AM CST Sat Nov 25 2017 A cold front will continue to move south through the state this Sat. Today Through Sunday Night A weak cold front is dropping south into the CWA early this Sat morning. This will result in temps a few deg cooler than seen on Fri for highs. with maybe a deg or two cooler.
506 AM EST Sat Nov 25 2017 MVFR ceilings are filtering in with the cold front along with northwesterly winds around 10-15 knots. A mid level short wave impulse will exit Lower Mi to the east just prior to daybreak, taking an associated cold front with it. A secondary mid level short wave impulse now rotating into northern Minnesota will track across Lower Mi this afternoon and will help drive a secondary cold front into area late this afternoon and evening. Low level cold air advection through the first half of the day will be offset to some degree by a deepening mixed layer, which will hold temps well into the 40s until late afternoon/evening with the passage of the secondary cold front.
635 AM EST Sat Nov 25 2017 A cold front over Indiana will move across the local area by midday.
1046 AM EST Sat Nov 25 2017 Currently - A weak area of high pressure over Florida and the eastern Gulf of Mexico is generating light north to northeast breezes across the Florida Keys. The north flow has brought in dew points in the lower to mid 60s. A weak high pressure system in the eastern Gulf of Mexico and Florida will maintain light north to northeast breezes across Keys waters.
1012 AM EST Sat Nov 25 2017 A cold front crosses today with limited moisture. Cooler Sunday. Quite a bit cooler in valley locations farther east where the atmosphere decoupled this evening. A cold front will push through today. Have a half inch or less snow accumulation along the higher ridges of the northern mountains. Upper trough exits towards Atlantic Canada, leaving the area under control of high pressure and dry conditions through mid week. Expect 500hPa heights to rebound, along with 850hPa temperatures, resulting an a warmer than normal period for the entire CWA.
446 AM CST Sat Nov 25 2017 /12Z TAFS/ At 1100Z a cold front extended just north of KABI to just south of Sweetwater to Big Spring. /issued 415 AM CST Sat Nov 25 2017/ (Today and Tonight) At 0945Z the cold front extended from Stamford to Roby to Colorado City. May see areas of frost and temperatures dropping into the lower to mid 30s in river valleys and low lying areas.
704 AM EST Sat Nov 25 2017 Shower chances return today with the passage of a cold front. Rain and snow showers are possible tonight with a trough of low pressure before high pressure returns dry weather on Sunday. Behind the front, scattered showers are expected this afternoon as an upper trough approaches the Great Lakes and Ohio Valley region. The upper trough will cross the region this evening, with continued rain and eventual snow showers in cold advection.
Low temperatures will be near to slightly below normal in the low to mid 50s. Weak high pressure in control of the weather pattern these next 24 hours.
Mostly responsible for this good fortune is a strong ridge of high pressure anchored over the desert SW US.
415 AM CST Sat Nov 25 2017 (Today and Tonight) At 0945Z the cold front extended from Stamford to Roby to Colorado City. May see areas of frost and temperatures dropping into the lower to mid 30s in river valleys and low lying areas.
/Issued 344 AM CST Sat Nov 25 2017/ The overall upper level pattern currently is slight troughing to the east and similar ridging to the west with an area of high pressure over the Baja Peninsula.
632 AM EST Sat Nov 25 2017 A cold front will pass through the area today with scattered showers, followed by colder air and lake effect snow showers into Sunday. Cold front will drop into western NY this morning and race east today. Second wave and trof drops through early Sunday which will briefly enhance the lake effect, and may drop an inch or so over the hills just southeast of Syracuse. Strong low-level cold air advection through the boundary layer will likely continue into Sunday behind the cold front. Given the orientation of the low-level wind fields/instability, some lake- effect snow will likely be ongoing Sunday morning as an upper-level trough swings across the region.
520 AM EST Sat Nov 25 2017 Shower chances return today with the passage of a cold front. Rain and snow showers are possible tonight with a trough of low pressure before high pressure returns dry weather on Sunday. Clouds should overspread the area this morning ahead of an approaching cold front. Scattered showers are expected this afternoon as an upper trough approaches the Great Lakes and Ohio Valley region. The upper trough will cross the region this evening, with continued rain and eventual snow showers in cold advection.
625 AM EST Sat Nov 25 2017 A cold front approaches from the Ohio Valley today, then crosses the area tonight.
A cold front has brought a wind shift to the north at all sites except the southern sites of KMLC and KFSM. /Issued 345 AM CST Sat Nov 25 2017/ Weak cold front settling into the region early this morning with a few light echoes showing up on radar near the Kansas/Oklahoma border. Cooler air will filter in behind the front, but high temperatures will still remain above normal with afternoon highs topping out in the 60s for much of the forecast area this afternoon. Overall, the weekend will be quite pleasant for November as high pressure dominates the central conus.
623 AM EST Sat Nov 25 2017 An approaching dry cold front will move through the forecast area this evening.
537 AM CST Sat Nov 25 2017 Scattered stratocumulus possible this morning mainly north of a Madison to Kenosha line before drier air moves into the lower levels. May have a few clouds around 3 thsd ft may affect mainly areas north of a madison to Kenosha line this morning before drier air moves into the low levels. An upper level trough will exit eastern Wisconsin this morning with a strong 250 mb northwest jet setting up across the Upper Great Lakes tonight. By afternoon even the low levels dry.
323 AM MST Sat Nov 25 2017 A ridge of high pressure will build over the region today and linger over the area into Sunday. As a result, expect dry weather and much warmer than normal daytime temperatures this weekend. Skies will be partly sunny/partly cloudy as cirrus continues to move through the ridge over the next 36 hours. Prominent ridging over the area now will translate eastward as southwest flow aloft takes over to start the period.
At 09Z a cold front is rapidly approaching the forecast area.
Cold front has cleared all TAF sites and expect a north/northeast wind to continue through the day today.
Little impactful weather as weak high pressure skirts across the region today.
/issued 326 AM EST Sat Nov 25 2017/ Drier air will continue to move into South Florida as high pressure builds over the region. No significant change in temperatures is expected as cooler air remains further north. High temperatures will remain near normal with highs in the low 80s and lows from the upper 50s across the northwestern interior sections to upper 60s across the east coast metro areas. On Sunday, a reinforcing cold front moves through the region with very limited low level moisture.
More development is possible next hour or so before thermal trof slides off to the east and drier air spreads in from the north. Scattered stratocumulus possible this morning mainly north of a Madison to Kenosha line before drier air moves into the lower levels. May have a few clouds around 3 thsd ft may affect mainly areas north of a madison to Kenosha line this morning before drier air moves into the low levels. An upper level trough will exit eastern Wisconsin this morning with a strong 250 mb northwest jet setting up across the Upper Great Lakes tonight. By afternoon even the low levels dry.
814 AM EST Sat Nov 25 2017 A cold front will approach from the west today and will cross the region tonight. A shallow ridge of high pressure will build in from the west on Sunday.
Dry conditions are still expected despite a weak cold front approaching our area later today.
531 AM CST Sat Nov 25 2017 Little impactful weather as weak high pressure skirts across the region today.
425 AM MST Sat Nov 25 2017 An upper ridge building to the west and a weak surface pressure gradient will lead to mostly sunny skies today with warmer than average temperatures, mainly in the 50s, and westerly winds at 5 to 15 mph. On Sunday the upper ridge will shift eastward across the region while a warm front lifts northeastward across the forecast area. Sunday high temperatures will be in the 60s across most of the area which is 20-25F degrees warmer than the average for this time of year.
The cold front that moved into the forecast area yesterday has exited to the southeast, with northerly winds in place behind the front as surface ridging builds into the area. The region will remain under northwesterly flow aloft as the mid-level trough advances into the eastern U. with a mid-level ridge building in across the western U. These light northerly winds combined with mostly sunny skies will result in "cooler" conditions today (compared to yesterday's record- breaking temperatures) with highs in the low 60s, which is still 10F- 15F degrees above the seasonal normals. With decent radiational cooling expected tonight with the mostly clear skies, low temperatures will plunge into the low/mid 30s by sunrise Sunday morning.
940 AM EST Sat Nov 25 2017 A cold front approaches from the Ohio Valley today, then crosses the area tonight.
High clouds over the area with upper ridge in western Oregon. Warm front will move through Oregon from sw to ne bringing light rain to Baker County and the west central Idaho Mountains today and tonight. Rain will develop again in the Boise Mountains and west central Idaho Mountains Sunday and also in the higher mountains of Baker County. Tonight will be milder than the current night, and Sunday will be warmer, but not as warm as MAV guidance.
Strong high pressure aloft will maintain unseasonably warm temperatures across the region this weekend.
High pressure will continue to provide dry weather with well above normal temperatures today. The ridge will weaken Sunday allowing a trough of low pressure to move into Central California.
558 AM EST Sat Nov 25 2017 High pressure just to the south will weaken today as offshore low pressure passes well to the southeast.
617 AM EST Sat Nov 25 2017 A cold front will approach from the west today and will cross the region tonight. A shallow ridge of high pressure will build in from the west on Sunday.
146 AM EDT Mon May 15 2017 Deepening low pressure tracks slowly northeast off the New England coast through Monday.
251 AM CDT Mon May 15 2017 An approaching short wave trough to the West will bring brisk Southerly winds to the region today. The trough will not be progressive tonight which will keep the thunderstorm activity restricted to the West for the most part and should not allow the activity to move into Central Kansas. Tuesday, the upper level trough will slowly come into phase with the surface through and will begin to push the dry line to the East.
318 AM CDT Mon May 15 2017 An upper level RIDGE dominated the central CONUS early this morning. Temps in most areas were in the lower 60s and upper 50s. The axis of the upper level RIDGE will slowly translate east thru tonight, and will result in the beginnings of SW flow aloft by late tonight, with the absence of any disturbances affecting our region continuing. The surface stationary front just to our northeast is anticipated to continue in its current position thru about midday before beginning to advance away as a warm front in response to flow aloft becoming more southwesterly. Elevated convection may spread into northeast and central MO late Tuesday night ahead of a negatively tilted upper level trough moving through the central Plains. Upper level divergence will be increasing over this area ahead of the upper level trough.
/issued 743 PM EDT Sun May 14 2017/ HIGH PRESSURE SURFACE AND ALOFT WILL HOLD OVER WEST CENTRAL AND SOUTHWEST FLORIDA TONIGHT AND MONDAY. MOSTLY SUNNY SKIES MONDAY WITH SLIGHTLY WARMER TEMPERATURES. HIGHS IN THE MID TO UPPER 80S AT THE COAST TO THE LOWER 90S OVER THE INTERIOR AND SOUTHWEST FLORIDA.
Some cirrus debris from west TX storms could head our way but will likely thin somewhat as it heads into the upper ridge axis. High clouds should make more eastward progress tomorrow as ridge axis shifts ewd and upper flow flattens somewhat. Today through Tuesday morning upper level ridging will be in place over Texas. All this means is that in addition to high temperatures in the mid/upper 80s, it will be humid with heat index values in the low 90s. Tuesday the ridge breaks down with a pretty strong short wave trough and vorticity max digging through the southern Plains. With the upper level ridge over SEC country, the short wave trough lifts NE over the Plains into the Midwest.
/BB/ Ridging is in place across the CWA with clear skies and calm wind across the area. /TW/ Prior discussion below: ridge of high pressure aloft, warm and dry weather has returned to the ArkLaMiss region today. Warmer temperatures are expected across the area tomorrow afternoon as the ridge strengthens. Humidity will be low enough during the afternoon hours that heat index values will not be much warmer than the air temperature.
The low risk across is western and north central Nebraska based on isolated storm coverage. Another cold front will drop into or through the area Tuesday.
541 AM EDT Mon May 15 2017 Dry and warmer weather is expected for the first half of the week under high pressure. Building high pressure should result in mainly clear skies and dry weather today, with highs near the seasonal average. Dry weather should continue Wed/Wed night under ridging and capping warmth aloft. Upper ridging is progged to break down and shift S/E by late in the week as a wrn CONUS trough begins it's track E.
This included the high res. Additionally took into consideration the ongoing ridge to valley temperature split on the order of 10 degrees. High pressure continues to dominate the weather and only some passing cirrus are expected as cumulus have mixed out and dissipated. Overnight low should average 5 to 8 degrees warmer tonight compared to lows from this morning. A strong upper level ridge will provide a continuation of dry weather through Monday night. Lows tonight will be a few degree above this mornings lows, but still into the low to mid 50s. Ridging will continue across the eastern half of the CONUS, with troughing out west.
Tuesday will be another unseasonably warm day, although slightly cooler 850 hpa temps and a bit more cloud cover should keep temperatures about 3 to 5 degrees cooler than on Monday.
400 AM EDT Mon May 15 2017 High pressure from eastern Canada will build south across the eastern Great Lakes today. A warm front over the Ohio Valley will move north across the area on Tuesday bringing summer type temperatures for mid week.