Aikyam-Lab/Synoptic-Bench huggingface dataset:
248 AM PDT TUE SEP 13 2016 Much cooler temperatures along with showers and isolated thunderstorms in store for today. Upper level low pressure has settled in over CA/NV with the cold front now completely through the region. Low pressure will start to move out of the area tonight, with cold temperatures expected into early Wednesday morning. Lows will bottom out below freezing for many Sierra valleys tonight, with western NV valleys dropping into the low 40s to mid 30s. Some colder valleys in western NV could see temperatures dropping to near freezing with potential for frost early Wednesday morning. A warming and drying trend will start Wednesday and through the end of the week as low pressure departs the area and high pressure begins to nose back into CA/NV.
1136 PM MDT MON SEP 12 2016 Cold front has cleared the forecast area with northerly winds gradually diminishing and showers/thunderstorms exiting to the east. Temperatures on Tuesday will probably be held in check due to the clouds/showers so will continue with the cooler side of guidance. This is due to southwesterly flow into the region caused by a deep closed low over the western CONUS.
419 AM CDT TUE SEP 13 2016 Focus of the forecast in the near term is on the cold front moving southward across the Panhandles early this morning.
318 AM CDT TUE SEP 13 2016 Latest water vapor satellite imagery showing upper level closed low over California and southwest flow aloft from the four corners area to the Great Lakes Region. surface/upper level ridge remains in control of the forecast area.
649 AM EDT TUE SEP 13 2016 Broad area of high pressure through Wednesday. A weak cold front crosses Wednesday night.
Actually some of the coldest areas this morning are down into the lower to mid 20s in the Seeley/Swan Valley, the Ovando region and up into the vicinity of Polebridge. A closed low in the great basin will usher in some clouds and a potential for a few showers and possibly a thunderstorm late in this afternoon and once again Wednesday afternoon. Tonight another round of some cold temperatures around freezing is likely to occur in the valleys across the Northern Rockies, especially in the typical colder valleys such as Butte, the Seeley Swan and the Highway 200 corridor. High pressure will increase over the region Wednesday and bring excellent weather through much of this weekend.
335 AM EDT TUE SEP 13 2016 High pressure will drift east while a cold front moves into the region late tonight and Wednesday. Highs today will reach the lower 80s and lows tonight will remain in the 60s.
600 AM EDT TUE SEP 13 2016 High pressure centered over the region will slowly move offshore today. A cold front will move across the area on Wednesday.
556 AM EDT TUE SEP 13 2016 Update A cold front will track slowly southeast through the Great Lakes region today and tonight.
457 AM MDT TUE SEP 13 2016 Low clouds have spread across northeastern Colorado this morning as the low level easterly flow continues. However there will be some drying aloft which should bring some midday clearing to the mountains and help to eat away the edges of the low clouds along the foothills. the upper level low pressure system will be centered over the Great Basin with an upper level trough extending south across Arizona and southern California. An upper level ridge of high pressure will be over the Central Plains States. Colorado will lie along the leading edge of the trough under the influence of a moderate southwest flow aloft. with a few showers over the high country.
These storms have developed along a cold front that is slowly working its way southward. The higher terrain across southeast Oklahoma and western Arkansas could also see some scattered showers and thunderstorms develop this afternoon as higher dewpoints nudge there way in and a slight wave lifts north out of Texas.
As opposed to late night readings in the mid 50s to around 60, temperatures this morning are running more in the lower to middle 60s.
145 AM EDT TUE SEP 13 2016 High pressure will extend south into the area through Wednesday night.
324 AM CDT TUE SEP 13 2016 The upper level ridge over the region will start to weaken as a an upper level low digs into northern California.
Cold front has now cleared the entire CWA, with breezy northerly winds across the entire area. The high pushes off to the east by Wednesday evening, with the next system possibly bringing precipitation back to the area late Wednesday night. Lows tonight will drop into the 40s as skies begin to clear ahead of the approaching low, but Tuesday night will be the coldest as the high settles in overhead. Generally looking at lows in the mid 30s to the lower 40s, with the coldest temperatures in the James River valley. With warmer air beginning to return on Wednesday, lows that night will stay in the 50s. The period begins with an upper level trough of low pressure over the Northern Rockies with southerly flow into this CWA.
630 AM EDT TUE SEP 13 2016 High pressure will extend south into the area through Wednesday night.
Much cooler and cloudier tomorrow. mainly over the higher terrain. It will likely be 15-20F cooler tomorrow afternoon as compared to this afternoon. Expect highs to only reach into 60s to lower 70s across the lower elevations. The upper low over NV will eject to the northeast across the Intermountain West through Wed.
A broad Great Basin trough will produce unsettled, breezy to windy conditions through Wednesday night. A small and weaker trough was lifting through the Four Corners this afternoon producing scattered thunderstorms for the southeast half of the forecast. Wednesday, the upper low lifts into NW Wyoming with strong SW gradient winds especially in NE Utah and NW Colorado. The associated cold front passes Wednesday evening.
Dry weather along with a warming trend is expected late in the week as high pressure builds in over the Eastern Pacific.
Under partly cloudy skies, temperatures are averaging in the lower 80s along the island chain. Surface wise, a trough of low pressure extends from the southern Gulf of Mexico to across the southern portion of the Florida peninsula, to a weak area of low pressure just south of West Palm Beach.
As winds continue to blow onshore, warm moist air will ride over the cooler shelf waters and lead to another night of areas of fog across the Middle Texas Coast.
A cold front is expected to move off to the southeast by the early evening hours.
Upper flow remains on the quick side with a deep upper low moving northeast into Ontario and another making slow progress toward southern California. Dry conditions and unseasonably warmer temperatures can be expected for this upcoming week.
with a few locales currently in the lower 40s. expect sunny skies to remain thru sunset as high pressure continues to build over the region. that area dropped into the low single numbers above zero. tempered slightly by any loss of snow under full sun today and daytime highs reaching into the low/mid 30 range. Rest of the CWA will see lows drop into the lower to mid teens.
Light to moderate southeast winds will decrease tonight as high pressure spreads out and the gradient weakens.
Chattanooga Airport, TN 57 65 40 59 / 60 80 20 20 Knoxville McGhee Tyson Airport, TN 54 62 35 56 / 60 80 10 20 Oak Ridge, TN 53 61 36 55 / 60 80 10 20 Tri Cities Airport, TN 49 62 32 54 / 40 80 10 10.
515 PM EST Mon Dec 26 2016 Rain shower coverage will increase tonight as a cold front crosses the region. Wind gusts over the higher terrain may be problematical later tonight as inversion levels resulting from todays warm advection erode with rain and passage of the front.
445 PM MST Mon Dec 26 2016 updated aviation discussion A transitory short wave ridge will be zipping by over the next 24 hours and bring a temporary lull to the shower activity. The ridge sweeps eastward tomorrow afternoon and we begin to advect high level moisture back into the northern mountains.
The cold front over the midwest will move into the Tennessee Valley by 12Z Tuesday and into north Georgia Tuesday afternoon. A cold front will move southeast through the CWA with rain ending after the frontal passage.
East Central Florida Forecast Discussion 856 PM EST Mon Dec 26 2016 A shallow wedge of cooler moist air has made its way south to coastal Volusia Co. The highest chances are indicated at the farther interior locations.
Light to moderate southeast winds will decrease tonight as high pressure spreads out and the gradient weakens. /issued 313 PM CST Mon Dec 26 2016/ SHORT TERM (Tonight through Tuesday Night): Mid/upper level ridge over the south-central Gulf will retrograde to the west-northwest through the period bringing somewhat greater subsidence to deep south Texas.
450 PM MST Mon Dec 26 2016 Water vapor loop showed the intense upper low that produced the cornucopia of winter weather on Christmas was located just north of MN. The pressure gradient between the front and a ridge over the intermountain west was sufficient to generate strong and gusty west to southwest winds for the wind prone areas of southeast WY.
841 PM CST Mon Dec 26 2016 The wind will continue to diminish through the night along with the low clouds moving out. A strong low pressure system will continue to exit the region this evening. Warmer air will also begin to push into the northern plains with highs popping back into the 20s and 30s.
A weak cold front from KMLC to KDUC to KFDR--and on southwest into Texas--will continue to advance southeast tonight. High pressure will fill in behind the front, leading to a decrease in north winds that are already relatively light. Light/variable winds are expected most of the night and early Tuesday morning, before the high moves away and brings back light southerly winds by midday. /issued 249 PM CST Mon Dec 26 2016/ A cold front has made it to around I-40 early this afternoon.
SFC ridging builds into the region tonight into Tuesday and no impacts are expected. Upper level pattern becomes more NW flow near the end of the week as an Arctic upper low sinks into southern Nunavut. Long wave trough deepens into the PAC NW from this upper low through the weekend, setting up SW flow pattern by Sun night. This will result in the next best chance for more widespread snowfall Sun night into Monday as a low pressure system moves across the Central plains.
As temperatures cool to the low to mid 60s tonight and winds calm, fog is expected to develop across the area. A highly amplified upper level ridge that has brought record warmth to our area will gradually flatten out through tonight, to be replaced with zonal flow at upper levels. Overnight lows should remain in the lower 60s across our area.
618 PM EST Mon Dec 26 2016 Rain shower coverage will increase tonight as a cold front crosses the region. Wind gusts over the higher terrain may be problematical later tonight as inversion levels resulting from todays warm advection erode with rain and passage of the front.
629 PM CST Mon Dec 26 2016 A slow movg cold front generally along the I-30 corridor attm. Therefore, stg convection may not affect other terminals later this eve as the cold front moves thru. the secondary line is associated with the weak cold front. This cold front will slowly sag south this evening and during the overnight hours. Temperatures will finally be cooler.
A weak cold front was located just northwest of a Lampasas to Llano to Fredericksburg line, and has now sagged into the northwest and west CWA, having cleared Rocksprings, and Eagle Pass. The cold front should move south of the CWA during the morning on Tuesday. Cooler Tuesday with highs in the upper 60s to low 70s.
922 PM EST Mon Dec 26 2016 High pressure stretches from the New England Coast and Canadian Maritimes southward through the Florida Peninsula. On the southern edge of this high pressure easterly flow is ushering showers quickly acorss the Florida Straits. Key West and the Lower Keys have felt the brunt of these showers this evening with Key West receiving 1. For the Lower Keys and surrounding waters including the Dry Tortugas, will keep high end chance of showers, 50 percent, in overnight, with a low end chance, 30 percent, through sunrise. High pressure extending from the Canadian Maritimes to the southeastern Gulf of Mexico will gradually move over the North Atlantic Tuesday.
927 PM EST Mon Dec 26 2016 A cold front will move east across the area this evening and early tonight. High pressure will move east across the Ohio Valley Tuesday night.
1043 PM EST Mon Dec 26 2016 High pressure will ridge into the forecast area from the north through tonight.
Water vapor loop showed the intense upper low that produced the cornucopia of winter weather on Christmas was located just north of MN. The pressure gradient between the front and a ridge over the intermountain west was sufficient to generate strong and gusty west to southwest winds for the wind prone areas of southeast WY.
With dew points in the low to mid-60s and temperatures as warm as they are, we are fairly unstable for this time of the year.
819 PM CST Mon Dec 26 2016 Low pressure has moved off to the northeast and was over eastern Ontario. However, KDLH gusted to 41 mph in the 02Z observation but the frequency of the higher gusts will continue to diminish as the low pulls further away from the region. Nudged temps cooler for Tuesday, as well. High pressure ridging will build across the Upper Midwest tonight and loiter for Tuesday bringing a brief reprieve from light snow.
With south winds arnd 10 mph and cloud cover, raised temps a few degrees to the lower 60s for mrng lows. The cold front should be across or just east of the I-65 corridor at daybreak, and be east of the area before noon. With the frontal passage and cooler air behind the front, no more record warmth. The front will become stationary south of us Monday night, then return northward as a warm front on Tuesday.
There is limited cloudiness over the high mountains right now and little to no snow falling anywhere up there. There may be a bit in the high mountains Tuesday afternoon, but nothing significant. For temperatures, Models have Tuesday's highs some 5-6 C warmer than this afternoon's readings. Moderate to strong northwest flow aloft will prevail across the state through the week as an upper ridge builds and remains over the west coast. The low amplitude of the ridge will allow some moisture to move off of the Pacific and across the northern Rocky Mountains during the middle part of the week.
Expanded the wind advisory across the north late this morning, and this is where we have seen some of the highest wind gusts today.
A few snow showers remain over eastern ND and some blowing snow on the higher terrain is bringing some minor reductions to visibilities, but the activity should taper off and winds will come down overnight. SFC ridging builds into the region tonight into Tuesday and no impacts are expected. Upper level pattern becomes more NW flow near the end of the week as an Arctic upper low sinks into southern Nunavut. Long wave trough deepens into the PAC NW from this upper low through the weekend, setting up SW flow pattern by Sun night. This will result in the next best chance for more widespread snowfall Sun night into Monday as a low pressure system moves across the Central plains.
With the freezing rain yesterday, the only snow that can move is what fell today.
Temperatures are not expected to fall much overnight as upper ridge builds east will spread warm air aloft and hinder the development of a deep inversion.
522 PM CST Mon Dec 26 2016 Winds will gradually relax into tonight as high pressure builds into the Central Plains tonight. High pressure will shift east, resulting increasing return flow and temperatures warming back above normal. Despite the warming, expect little in the way of melting with wet bulb temperatures well below freezing, especially north of I-90 where much of the ice remains. Long range models develop trough over the northern plains states keeping a westerly flow over the forecast area.
/issued 629 PM CST Mon Dec 26 2016/ A slow movg cold front generally along the I-30 corridor attm. Therefore, stg convection may not affect other terminals later this eve as the cold front moves thru. the secondary line is associated with the weak cold front. This cold front will slowly sag south this evening and during the overnight hours. Temperatures will finally be cooler.
A weak weather disturbance will graze northern Utah Tuesday before high pressure returns midweek.
Cold front southeast Missouri will move through Middle Tennessee in the late night into early Tuesday. Made some minor tweaks here and there to timing from the 26/18Z TAF issuance, but all in all, other than adding erosion of all ceilings and VFR/SKC conditions after 27/21Z as high pressure influences sfc/aloft build across the entire mid state, no significant changes made to terminal forecasts from 27/18Z issuance, as timing of impacts from a line of shwrs with some embedded sct tstms will be at CKV around 27/02Z, BNA 27/05Z, and 27/11Z CSV respectively.
With weak downslope flow on Tuesday and limited mixing, thinking temperatures should be at or above today's values, which is a bit warmer than going forecast.
We will be well within a low level thermal trough so would expect to see more cloud cover around as is seen upstream in the Plains.
Tuesday will see a weak ridge of high pressure moving across the Central Plains with warm air advection aloft during the afternoon hours. /Tuesday night through Monday/ Not much change to the going forecast with an upper ridge progressing across the country putting Iowa in zonal to weakly Southwest flow.
The area with the greatest cloud cover will be over the southern portion of the CWA where lows in the lower 50s are expected along the I-10 corridor.
With the strong gulf ridging in place, it will be hard to push further south through the day tomorrow, and as the upper support exits to the northeast, the lift will be meager at best. High pressure and cooler conditions were located over north central Georgia. Isentropic lift over the cooler air has produced some IFR ceilings. But this lifting/cooling process breaks down as a cold front approaches the area from the northwest. A weak cold front will sink southward into northwest Alabama overnight and slowly slide southward through the area Tuesday.
The much cooler and drier air is behind the second boundary and will also sink to the southeast overnight. (ISSUED 605 PM CST Mon Dec 26 2016 ) Broken line of convection in advance of a cold front continues to decrease in both intensity and coverage. Actual cold front itself is now just working its way across central Arkansas.
Also lowered min temps tonight across northeast and east-central NV as the high clouds expected to help keep temps warmer have been delayed in their arrival.
605 PM CST Mon Dec 26 2016 Broken line of convection in advance of a cold front continues to decrease in both intensity and coverage. Actual cold front itself is now just working its way across central Arkansas.
A cold front will approach from the west Tuesday preceded by warmer temperatures.
Clouds will also be slowly decreasing as high pressure subsidence moved in from the west. Mid level ridging means slightly warmer overnight lows Tuesday night.
757 PM EST Mon Dec 26 2016 Rain shower coverage will increase tonight as a cold front crosses the region. This is overdone a bit, but believe that advisory winds are likely, especially on the ridge tops. Wind gusts over the higher terrain may be problematical later tonight as inversion levels resulting from todays warm advection erode with rain and passage of the front.
Nudged temps cooler for Tuesday, as well. High pressure ridging will build across the Upper Midwest tonight and loiter for Tuesday bringing a brief reprieve from light snow.
605 PM EST Mon Dec 26 2016 Rain will diminish this evening across the southeast as cooler and drier air filters in behind the cold front crossing the area.
936 PM EST Mon Dec 26 2016 High pressure is moving into the Gulf of Maine. A cold front over Indiana will cross the region Tuesday.
Near the coast where cooler water temperatures have kept air temperatures in the 60s, sea fog is persisting with visibilities ranging from 3/4 of a mile to 2 miles. Next northern stream short wave looks to carve out more of a trough over the Eastern U.
Otherwise, the clearing trend should spread over the entire forecast area as the evening progresses, with mostly clear skies continuing into Tuesday as high pressure building east out of the central Plains. With the general upper flow more zonal, temperatures on Tuesday will be cooler but still above normal, mainly upper 30s to lower 40s.
associated with the Pacific cold front that moved through last night.
Satellite imagery shows a thin layer of high cirrus streaming northeast from northwest Mexico while surface observation show a weak cold front located from southeast Colorado into north-central Okla. Lighter winds and lingering effects of surface ridging off the Caprock may keep temperatures a little bit cooler to the east.
The most numerous showers were along/near the cold front, that currently extended from SW Arkansas and north of Shreveport, to extreme SE Missouri. A southerly flow preceding an approaching cold front will continue to feed more lower level moisture across the region. The cold front should be across or just east of the I-65 corridor at daybreak, and be east of the area before noon. With the frontal passage and cooler air behind the front, no more record warmth. The front will become stationary south of us Monday night, then return northward as a warm front on Tuesday.
Temperatures are in the upper 40s to mid 50s across the Valley as of this writing, generally a few degrees warmer than yesterday.
759 PM EST Mon Dec 26 2016 An area of high pressure to our north will gradually slip southward tonight, bringing light east to northeast winds. This will especially be true along the Nature Coast and interior northern Florida, nearer the high pressure center and weaker winds. High pressure will make its way south over the next couple of days ahead of a cold front.
Water vapor imagery shows the strong upper level low pressure system that moved across the Central Plains yesterday is now exiting the Upper Midwest into Canada. Dry and quiet weather is expected across western Kansas today and tonight with the ridge of high pressure in place. Winds will slowly shift from the north to the south across the state as the high pressure slides southeast.
Winds are westerly and with high pressure to the southwest, they will continue overnight and into tomorrow. Otherwise, the clearing trend should spread over the entire forecast area as the evening progresses, with mostly clear skies continuing into Tuesday as high pressure building east out of the central Plains. With the general upper flow more zonal, temperatures on Tuesday will be cooler but still above normal, mainly upper 30s to lower 40s.
550 PM EST Mon Dec 26 2016 High pressure will ridge into the forecast area from the north through tonight.
Another quiet day for Tuesday as high pressure remains across the region. The models are in very good agreement showing a series of 3 high pressure systems moving into Wrn and Ncntl Neb during the next 7 days. All of these high pressure system have their orgins in either the Pacific or a mix of Arctic/Pacific versus Siberia.
A strong low pressure system will continue to exit the region this evening. Warmer air will also begin to push into the northern plains with highs popping back into the 20s and 30s.
High pressure continues to drift south today, with return flow developing across the CWA. The rest of the forecast appears dry with a low amplitude ridge building in from the northwest.
Lows Sunday morning, however, will actually be several degrees warmer than today's as southerly flow advects moisture warmer air back into the area tonight.
Just freshened the high temperature and wind grids per latest observations and short-term model guidance. Canadian surface cold front arrives late Saturday night or earl Sunday morning for increasing low clouds and areas of light snow.