Aikyam-Lab/Synoptic-Bench huggingface dataset:
458 AM CDT Mon Mar 12 2018 Drier and cooler air filtering into the region early this morning in the wake of the CDFNT that crossed the area SUN afternoon and evening. 13 Moderate to strong north winds will gradually subside this afternoon through tonight as high pressure settles into the region.
345 AM MDT Mon Mar 12 2018 A short wave trough will move across Wyoming today and into the Central Plains tonight. Highs should be near normal with readings in the lower to mid 50s across northeast Colorado. For the big picture, large mid/upper-level longwave trough continues to dip southward along the Pacific West Coast on Tuesday as a sharp upper ridge migrates eastward over the Great Basin/Desert Southwest.
1125 PM MDT Sun Mar 11 2018 Very limited mid level moisture moving over the upper level high pressure ridge will bring some very spotty light snow to the higher mountains tonight and Monday. Monday night and Tuesday will be dry and warmer.
630 AM EDT Mon Mar 12 2018 Although a high pressure system, will move further off the coast, it will still allow dry weather to continue, for most of the day.
120 AM EDT Mon Mar 12 2018 A large band of showers continues to move across the Southern Appalachian Region as a low pressure system tracks through the area tonight into Monday morning. as the low exits the area.
The upper level trof that was affecting the forecast area today was moving out of northwest Wisconsin as of 19Z/2pm. One more piece of vorticity was already beginning to affect northeast Minnesota as a longer wave trof in Ontario was nearby. At the surface, a couple of weak surface trofs were affecting the region. They were working in concert with the upper level trof to generate some flurries over the Arrowhead. Cannot rule out some very light snow amounts over the higher terrain over Iron county and have a mention.
High pressure will build over the region today bringing drier and warmer weather.
323 AM CDT Mon Mar 12 2018 High pressure will continue to build southward into Kansas today. Expect all areas to be sunny by afternoon hours with high temperatures topping out in the lower 50s. Lows tonight will range from the low 20s in north central Kansas to the mid 20s in east central Kansas.
Strong compact upper level low centered over the Lake of the Ozarks is moving southeast. Wet snow is occurring northeast of the low track with some decent accumulation in some areas form central into east central MO.
/issued 338 PM CDT Sun Mar 11 2018/ Cool surface ridging continued to wedge itself southward over the region this afternoon, with progressive drying aloft as noted by the loss of mid-level clouds across much of our northern zones. Before a progressive upper ridge arrives by midweek, a weak trough in cyclonic NW flow is progged to graze the eastern Panhandles Monday night and Tuesday.
To the north where clearing has taken place, readings actually remain above freezing. The freezing line is north of Bloomington in central IN.
Brisk northwest winds due to mixing and cold air advection will keep temperatures a little cooler than past days with highs in the upper 40s. Highs Tuesday will only be in the lower 30s with brisk northwest winds.
136 AM EDT Mon Mar 12 2018 Weak surface and upper level ridging over the North country tonight will shut down residual light snow showers and provide quiet weather tonight and Monday.
Winds will gradually subside with the pressure gradient relaxing as cool Canadian high pressure builds south toward our region.
235 AM CDT Mon Mar 12 2018 High pressure building south into the area this morning brought low clouds to the area. This high pressure will serve as the foci for today's weather. Overall cool to start the period then a warming trend as the flow turns southwest and brings warmer air into the area. Latest models still advertise a longwave trof across the western CONUS that shifts east through the weekend.
140 AM EDT Mon Mar 12 2018 Upper air pattern consists of a 500 mb trough over the central plains and another over northern Manitoba and Ontario. The trough over central Canada will move south and affect the upper Great Lakes tonight and the lower Great Lakes on Mon. An upper low will move just E of the CWA Mon night, with a vort max or two rotating around the W side of the low and across the area Mon night into Tue.
318 AM CDT Mon Mar 12 2018 Cooler temperatures the next couple of days as cool Canadian air continues to drop south through the Plains, but winds remain light. A weak disturbance drops south through the High Plains on Tuesday and gradually gets sheared out, but may have just enough moisture for a few showers across parts of western Oklahoma.
338 AM CDT Mon Mar 12 2018 A large ridge of high pressure over the northern Plains was building southeastward into MO.
404 AM EDT Mon Mar 12 2018 Although a high pressure system, will move further off the coast, it will still allow dry weather to continue, for most of the day.
545 AM CDT Mon Mar 12 2018 A large ridge of high pressure over the northern Plains was building southeastward into MO.
328 AM MDT Mon Mar 12 2018 08z surface analysis had ridge across the northern Plains, just east of the CWA.
431 PM MST Tue Jan 16 2018 20z surface analysis had low pressure over central AB with warm front into western NE. 12z KUNR sounding showed warm air ready to invade and it is clearly doing so, most pronounced over the higher elevations. Warm front will rush through the CWA with sustained warm air advection leading to widespread readings crossing the 40F threshold Wednesday afternoon.
A flat ridge of high pressure is building over the region tonight ahead of an upper level trough in the eastern Pacific. This trough has a closed upper level low that will approach the coast of Western Canada on Wednesday. Ahead of it there will be a warm front clipping the Pacific Northwest late tonight and Wednesday. This will impact the northwest portion of the forecast area, mainly the East Slopes of the Washington Cascades, with some snow initially above 3000 feet before snow levels rise in the afternoon behind the warm front. There will also be some increasing southerly winds mainly across eastern Oregon associated with the warm front passage.
Proton An upper ridge over Montana today will be flattened tonight by a Pacific disturbance. A strong temperature inversion over the area will weaken as a result and allow temperatures to rise in valley locations tonight with readings to top out close to the freezing/thawing point in some of the coldest locations Wednesday.
610 PM EST Tue Jan 16 2018 Low pressure will produce widespread accumulating snow across New York and Pennsylvania through late tonight then begin diminishing toward morning. An elongated upper level trough from the central Great Lakes to the Gulf states will keep a deep southwest flow of moist air over the area through much of tonight. A weak area of low pressure over central New York and another low lifting northeast along the coast will produce an inverted trough over the area through late tonight. Not much change to the snow totals generally 5 to 7 inches with locally up to 8 inches in the higher terrain of the southern Catskills and Poconos.
High pressure will remain over the Great Basin into tomorrow. A weak system will move through the high late today through tonight bringing some clouds.
550 PM CST Tue Jan 16 2018 Cold front has now pushed off shore over southeast TX with a very cold airmass situated over the Plains. In the upper levels, a positive tilted trough extends from the eastern Great Lakes into the Ozark region. Upper trough is expected to continue tracking east and will move across the Eastern Seaboard on Wed. Lows tonight will likely be colder than temps early this morning, but winds will be much lighter resulting in warmer wind chills. Weak upper ridging is forecast to track over the Rockies and into the northern Plains by Thu. They both track it across the desert southwest Sat, into the high Plains Sat night and across central KS on Sun.
635 PM EST Tue Jan 16 2018 A trough of low pressure will move east across the area tonight.
Still expect temperatures to drop into single digits later tonight with wind chills dipping below zero and possibly close to -12 to -15 across the higher elevations. Winds begin to dwindle through the day as high pressure begins to build into the area. With the high over the area Wed night/Thurs morning, light winds and clear skies would support a good radiational cooling night.
Temperatures have been falling slowly this evening with south winds staying up along with bringing in slightly warmer air. May see a bit of a downslope wind event over the Coteau tonight into tomorrow morning as well, but with very little snow on the ground, expect the main effect to just be the potential for some patchy blowing snow along the higher elevation areas. Will see temperatures fall into the single digits above and below zero tonight, then the warmer air begins to take over, with highs in the upper 20s east to the lower 40s west on Wednesday afternoon.
433 PM MST Tue Jan 16 2018 Dry and warm weather continues as high pressure remains overhead. Some high clouds are streaming over western and central Utah at this our thanks to a very weak upper level trough. This trough will move into our area after midnight and bring some high clouds for the morning drive to work.
846 PM MST Tue Jan 16 2018 Under clear skies, the higher mountain valleys and parts of the eastern plains are radiating quicker than forecast. Lighter and slightly warmer flow will once again produce strong surface based inversions producing pockets of especially cold air such as along river bottoms. A weak ripple in this flow marking the leading edge of significantly warmer aloft is fcst to pass over the fcst area with a narrow band of mid and high-level moisture late in the day. Highs tomorrow anywhere from 12 to 18 deg F warmer on the plains and 6 to 12 deg F warmer in the high country.
/issued 407 PM CST Tue Jan 16 2018/ An upper level trough extending from the Great Lakes to SWRN TX continues to move eastward followed by an upper level high amplitude ridge reaching into NRN AK. A center of low pressure at 500mb is observed in the Gulf of AK. This disturbance should remain to our south as the upper level ridge moves eastward by the end of the work week.
551 PM CST Tue Jan 16 2018 Winds will become light by Wed morning as high pressure moves into the state.
Glass Upper level trough continues to move east out of the forecast area this afternoon.
The low clouds which were over the San Luis valley (SLV) earlier have cleared. Temps were cold across the region with nearly all temps at or below freezing. The warmest temps were actually in the 8-10 thousand foot range were readings were in the lower to mid 30s. Higher up on the divides, temps will be a bit warmer, with readings around 10F. In matter of fact, the low temps on top of Pikes Peak is fcst to be warmer than Colorado Springs. A weak boundary will come down the plains tomorrow shifting the winds to a more upslope component towards sunset over the lower elevations.
350 PM MST Tue Jan 16 2018 Dry and warm weather continues as high pressure remains overhead. Some high clouds are streaming over western and central Utah at this our thanks to a very weak upper level trough. This trough will move into our area after midnight and bring some high clouds for the morning drive to work.
Freeze Watch in Effect Wednesday Night for Portions of East The next strong cold front is waiting in the wings, currently situated over the western panhandle down into the central Gulf. Weak ridging over the peninsula will diminish overnight ahead of the front, allowing winds to collapse. Overnight lows generally in the mid 40s to around 50, with warmer temps along the barrier islands south of the Cape. N/NW winds 10-15 knots overnight will rapidly increase up to 15-20 knots by late Wednesday afternoon behind passing cold front, with a Small Craft Advisory going back into effect for the adjacent Atlantic.
939 PM CST Tue Jan 16 2018 Arctic high pressure centered over eastern Oklahoma this evening setting the stage for near optimal radiational cooling conditions tonight. Arctic high pressure resides over the Plains today, the center of which was over Kansas this afternoon. The high center will drift southeast over our area tonight. The persistent La Nina ridge in the west, trough in the east pattern this winter will be flipped.
High pressure will rebuild over the area tonight and will keep mild temperatures and dry conditions across the region through Wednesday night aside from persistent low clouds and fog in the San Joaquin Valley.
922 PM EST Tue Jan 16 2018 A trough of low pressure will move east across the area tonight.
Lighter and slightly warmer flow will once again produce strong surface based inversions producing pockets of especially cold air such as along river bottoms. A weak ripple in this flow marking the leading edge of significantly warmer aloft is fcst to pass over the fcst area with a narrow band of mid and high-level moisture late in the day. Highs tomorrow anywhere from 12 to 18 deg F warmer on the plains and 6 to 12 deg F warmer in the high country.
/issued 225 PM CST Tue Jan 16 2018/ Have deep trough extending from the Great Lakes to the Southern Plains while a ridge extends from the Desert SW to the Northern Rockies. The ridge will build across the west as the trough moves east providing mild wx for the region.
With the cold temperatures and wind, wind chill values along the higher elevations of the plateau may get as low as 5 below to 15 below zero, so a Wind Chill Advisory has been continued for these areas. During the day Wednesday, the upper trough axis will pivot through the area with: 1) steep low- level lapse rates; 2) 850mb NNW winds from 5-15 kt; and 3) sufficient low- level moisture. Chattanooga Airport, TN 11 25 14 39 / 70 10 0 0 Knoxville McGhee Tyson Airport, TN 10 22 10 36 / 80 10 0 0 Oak Ridge, TN 9 25 9 36 / 70 10 0 0 Tri Cities Airport, TN 13 21 9 34 / 80 10 0 0 NC.
537 PM CST Tue Jan 16 2018 Upper level trough continues to move east out of the forecast area this afternoon.
Cold and dry winter weather is expected to slowly transition to warmer temperatures later this week.
/issued 336 PM EST Tue Jan 16 2018/ High pressure along the mid-Atlantic coast has been responsible for breezy northeast winds. On Wednesday, a deep trough of low pressure will begin to push eastward over the Appalachians. This will drive a cold front through South Florida on Wednesday. Maximum temperatures Wednesday afternoon are forecast to be in the low to mid 70s, except near 70 in the northwest portion of the area, as the front will reach that location sooner.
Although snow has ended, very little if any melting occurred this afternoon so expect most secondary roads to remain troublesome overnight along with any refreezing of lingering moisture on bridges and overpasses where black ice may develop. These travel concerns will carry over into Wednesday as well with temperatures still struggling to get above freezing.
534 PM CST Tue Jan 16 2018 Sharp upper trough extending from Lower Michigan to Missouri is currently creating enough synoptic lift to trigger scattered snow showers across central Illinois. Satellite trends show partial clearing behind the trough axis across Iowa and northern Illinois, so am expecting clouds to hang on for a few more hours before skies clear from northwest to southeast after sunset. Sunshine will return to the picture on Wednesday, allowing temperatures to slowly moderate into the lower 20s.
Some of the more urban areas, such as the bigger cities along the I-20 corridor, may experience slightly warmer temperatures compared to outlying locations. Although snow has ended, very little if any melting occurred this afternoon so expect most secondary roads to remain troublesome overnight along with any refreezing of lingering moisture on bridges and overpasses where black ice may develop. These travel concerns will carry over into Wednesday as well with temperatures still struggling to get above freezing.
Sharp upper trough extending from Lower Michigan to Missouri is currently creating enough synoptic lift to trigger scattered snow showers across central Illinois. Satellite trends show partial clearing behind the trough axis across Iowa and northern Illinois, so am expecting clouds to hang on for a few more hours before skies clear from northwest to southeast after sunset. Sunshine will return to the picture on Wednesday, allowing temperatures to slowly moderate into the lower 20s.
533 PM CST Tue Jan 16 2018 WV imagery this afternoon showing a well amplified upstream ridge over the Rockies gradually approaching the central CONUS. large area of high pressure was in control over the Plains.
515 PM CST Tue Jan 16 2018 Early afternoon surface analysis indicated broad high pressure stretching from the upper midwest through the southern plains. This trend should continue through the rest of the afternoon with the approach of the ridge axis. It will also be noticeably warmer than today with 925 hPa temperatures rising about 10 degrees Celsius. Expect afternoon highs in the lower to mid 20s.
The next front however will approach the coast a warm front. This front could provide enough lift for occasional light rain at the Curry County coast and the higher terrain of western Siskiyou County.
Highlights in the short term period include gusty westerly winds and warmer temperatures.
554 PM CST Tue Jan 16 2018 A bitterly cold Arctic airmass will remain entrenched across the Missouri Ozarks and southeastern Kansas tonight as Arctic high pressure transitions southeastward into the area. Southerly winds will increase with high pressure becomes centered across the southeastern U. while low pressure develops across the Plains.
Temps have been holding fairly steady in the low single digits, with a heat wave at Walhalla at 10 above. Wednesday will be sunny and significantly warmer, with high temperatures in the upper 20s across northwest Minnesota and lower 30s into North Dakota.
The area of light freezing drizzle has been confined to Deep South Texas and expected to stay there this evening. There has been intermittent freezing drizzle reported over the Coastal Bend. A band of freezing rain and sleet will continue to move across the Victoria Crossroads in region of better isentropic lift for the next 2-3 hours. Freezing drizzle will be possible early this evening with MVFR vsbys expected.
407 PM CST Tue Jan 16 2018 An upper level trough extending from the Great Lakes to SWRN TX continues to move eastward followed by an upper level high amplitude ridge reaching into NRN AK. A center of low pressure at 500mb is observed in the Gulf of AK. This disturbance should remain to our south as the upper level ridge moves eastward by the end of the work week.
414 AM EDT Sun Aug 6 2017 Precipitation chances will increase through today into Monday as a low pressure system moves east across the region. However, with very different solutions among the CAMS in the development and progression of the low and associated warm front, its appearing that the recent runs of the HRRR have the best representation, so leaning toward this solution through today. For tonight, the low will lift east/northeast through the mid Ohio valley with a warm frontal boundary lifting as far north as midway through the forecast area, and is expected to become the focus of ample rainfall. Potent low pressure carried by a westerly flow aloft will be moving across Ohio on Monday. Rain chances diminish by Monday afternoon as the low tracks rather quickly east toward the Atlantic Coast.
115 AM EDT Sun Aug 6 2017 Crossing low pressure will return rain to the region tonight and Monday. For Sunday, sub-average temperature will be maintained under upper troughing and a continued cloud increase.
350 AM EDT Sun Aug 6 2017 Crossing low pressure will return rain to the region tonight and Monday.
With high pressure located on the north side of the boundary. With the area of high pressure remaining over the Plains region at least thru tonight. low pressure sets up over the eastern Rockies.
Temperatures will likely fall into the low to mid 50s, with some upper 40s possible in central MN and northwest WI.
138 AM EDT Sun Aug 6 2017 A weak inland trough will linger over the region through Monday. Monday: Enough upper ridging will persist to keep diurnal shower and tstm activity in the isolated to locally scattered range. Partly cloudy skies will prevail with highs in the lower 90s inland to the mid 80s on the beaches.
1038 PM PDT Sat Aug 5 2017 Wildfire smoke from fires in British Columbia and Montana trapped under an area of high pressure will persist over Eastern Washington and North Idaho, otherwise dry conditions will linger through the weekend and through much of the upcoming workweek. High pressure will remain in control for the next several days for a continuation of the warm, dry conditions.
Winds today look to be from the east to northeast as ta dome of high pressure remains north of the area. As for temperatures, highs today look to reach to around 80 degrees with lows tonight in the lower 60s.
A broad, low amplitude trough will continue to cover much of the CONUS today, with a flat east/west deep layer ridge prevailing locally. Typical summertime wet microburst forecast parameters appear on the low end of what would be expected for severe thunderstorms.
A slight chance for afternoon thunderstorms will lie in along the ridges in the Central Mountains and Southern Highland Mountains otherwise, do not see any chances for rain or lightning anywhere else today. High pressure is settled over our region tomorrow with more diurnally based winds in the forecast and better chances for showers and thunderstorms across mountainous terrain.
Broad upper trough will remain west of the region today with west-southwesterly flow aloft across the area. The frontal boundary stalled in the western portion of the forecast area will retreat northward today as a warm front. High resolution models show isolated to scattered convection developing during the afternoon with the highest coverage southeast. High temperatures in the lower 90s this afternoon. Tonight, the weak frontal boundary that had stalled out over the area will be moving northward ahead of another approaching cold front. The cold front will push towards the region through the day on Monday. The cold front will slow Monday night, but will still be moving southward through the night. The frontal boundary remains stalled west of the TAF sites this morning and is expected to retreat to the north as a warm front later today.
A mesoscale vorticity center associated with 850/700mb low pressure was located near Grove, Oklahoma and was moving nearly due east. This will be most likely along and south of the inverted trough of low pressure that models lay out nearly along the I-44 corridor into this afternoon. The boundary/inverted trough will slide south into northern Arkansas this evening and slowly bring an end to the rainfall tonight.
246 AM PDT Sun Aug 6 2017 For today through midweek, low pressure stalling over northern California will produce thunderstorms with heavy rainfall possible.
512 AM EDT Sun Aug 6 2017 Crossing low pressure will return rain to the region tonight and Monday.
The clouds and lighter south to southeast flow wl keep temperatures a few degrees cooler than yesterday. The weak upper trough will be slow to clear southern WI, so the slight chance of showers will continue through Monday afternoon in a few locations. Temperatures will be cooler near Lake Michigan due to northeast winds.
Late tonight-Sunday morning: A backdoor cold front is shown to move over our CWA from central Nebraska late tonight, with increasing low level moisture. If stratus holds on in the west highs may not warm out of the lower 70s and afternoon shower/thunderstorm chances could be greatly diminished.
A weak upper trough will move out of the Big Bend region into South Central and South Texas today. Low chances for showers and thunderstorms will continue Sunday night into Monday as weak trough moves to the east across the area.