Aikyam-Lab/Synoptic-Bench huggingface dataset:
1027 AM MDT Thu Apr 27 2017 Current surface analysis shows low pressure over western WY and southeast CO, with frontal boundary stretching between the two areas. At the surface, Canadian high pressure resides across the Dakotas, with low pressure centered across central Wyoming. With high pressure over the central Dakotas, most of the precip should be confined to the Black Hills area and west. However, across southern Campbell County where the heaviest pcpn is forecast, 6 to 8 inches of snow is possible, especially across the higher elevations. The weekend looks mainly dry, but remaining cool, as large trof lingers over the region. Active northwest flow on the back side of the trough will bring several disturbances across the area, with daily chances for showers in most areas.
1158 AM CDT Thu Apr 27 2017 A brief period of upper level short wave ridging will keep most of today dry across the region. However, another short wave trough will move east into the central Plains from later this afternoon into tonight. We went on the lower side of temperature guidance today with a quicker increase in clouds expected. Most areas should warm into the lower to middle 60s. Lows should be in the lower to middle 50s.
A band of rain showers and embedded thunderstorms continues to move northeast across the region ahead of a cold front to our west. With warmer surface temperatures ahead of this activity, enough instability may be available for a few strong thunderstorms capable of gusty winds across northeast Tennessee and parts of southwest Virginia this afternoon. Chattanooga Airport, TN 77 54 85 66 / 90 10 10 20 Knoxville McGhee Tyson Airport, TN 76 53 85 65 / 90 10 10 20 Oak Ridge, TN 77 52 85 65 / 80 10 10 20 Tri Cities Airport, TN 76 51 85 59 / 60 20 10 20.
852 AM EDT Thu Apr 27 2017 Weakening low pressure off the New Jersey coast will slowly drift east. A cold front will cross the region Friday afternoon.
borsum PREVIOUS SHORT TERM DISCUSSION: Broad upper trof over central CONUS expected to remain in place through the end of the week. Weak high pressure reaching into western North Dakota from central Canada will keep the eastern zones mostly dry.
With an upper level trof over the region today, expect scattered rain/snow showers. An upper level trof of low pressure will continue to reside over the region today. The highlights could be extended later today into tonight/Friday morning, as an additional 2 to 5 inches is possible at higher elevations.
Breezy southwest winds of 10-20 mph and gusts in the 20s along with sunny skies was warming temps into the low to mid 40s by 10 am. Late morning surface analysis shows 1029 mb high pressure sprawled across the southeast states (centered on the AL/GA line). Meanwhile 1009 mb low pressure was over ne Iowa with a cold front extending sw thru se NE and nw KS to deepening 1004 mb low pressure in se CO. Breezy and much warmer conditions will be the rule today. as southwesterly winds increase ahead of the next slowly approaching cold front. Low temperatures will be in the lower to middle 30s. The rain will come to an end by late Sunday afternoon as high temperatures top out in the lower to middle 40s.
1114 AM EST Sat Dec 16 2017 High pressure will build across the Southeast U.
215 PM EST Sat Dec 16 2017 High pressure will build across the Southeast U.
150 PM MST Sat Dec 16 2017 Cold high pressure over Montana with warmer low pressure over Colorado will continue to produce cold moist northeast low level flow over western and central Wyoming with areas of snow.
347 PM CST Sat Dec 16 2017 The rain is coming, and the higher clouds have already spread across much of the area. Amounts will be on the light side with the higher accumulations across western Arkansas, where just up to a half inch is possible. The upper storm system responsible for tonight's rain will move quickly east by Sunday, but low clouds and lingering early morning showers across Arkansas will likely hold temperatures down in the low to mid 50s.
An upper low tracking across the area will result in an increase in clouds this PM, but VFR.
428 PM EST Sat Dec 16 2017 High pressure is moving in for tonight and last into Sunday. A weakening wave of low pressure will move in from the midwest late Sunday. The low pressure over the mid-MS valley will fall apart as it goes into the OH valley and a loss of moisture will kill much of the precip as the feature fills over us and moves eastward Sun night. Many places should stay above freezing.
Weak upper trough passing through eastern Montana will slowly exit to our east as broad upper ridge builds east. However the ridge will not reach too far into Montana as a strong Pacific jet stream will have a greater influence.
Breezy and warmer weather will occur this afternoon with increasing mid and high level cloud cover. Based on model guidance, mainly the HRRR/HRRRX, think that some light rain/sprinkles may get into locations south of a Vernon, Texas to Pauls Valley to Atoka line as early as 3 pm this afternoon, but appears most rain will not occur until after 6 pm this evening with the approach of a mid/upper level trough. With the lack of any significant westerly component to lower level flow due to meridional trajectory of mid-level wave and surface cyclone west/northwest of CWA, amount of warming/drying is in question. We did lower dewpoints below the lowest guidance numbers and increased the winds a bit.
At the surface, a cold front will advance into the Lower Mississippi Valley with rain preceding it. Look for increasing clouds through the period with lows in the lower to mid 40s.
/issued 352 AM CST Sat Dec 16 2017/ (Today and Tonight) The potential for rain, mainly this afternoon and evening, continues to be the high-light of the short-term forecast. The upper low, which water vapor imagery indicates is currently over northwest Mexico - just east of south Baja California - will continue to move toward the Big Bend region this morning.
321 PM CST Sat Dec 16 2017 (Tonight and Sunday) Patchy rain is occurring this afternoon across our area along with widespread cloud cover, in association with an upper low and trough moving across the Big Bend region. The upper trough will lift out to the northeast across our area early tonight, as an upstream low and trough dive southeast into the northern Baja region. Rain chances will shut off as the aforementioned trough axis swings through. Not that much of a temperature dropoff is anticipated tonight, with overnight lows expected to range from the upper 30s across our western and southern counties, to the lower 40s in the eastern Big Country and Heartland areas. A weak cold frontal boundary should sag south into our far northern counties by late afternoon or early evening.
244 PM CST Sat Dec 16 2017 An upper trough is over West Texas and southeast New Mexico with another upper trough over the western CONUS. The upper trough to the west deepens and approaches the area on Sunday.
1231 PM EST Sat Dec 16 2017 High pressure tonight.
Once the elevated precip begins, the lower levels of the atmosphere should quickly saturate, and the rain should reach the surface. /issued 354 AM CST Sat Dec 16 2017/ Upper low over AZ/Mex border closing off, providing a temporary reduction of clouds streaming into area.
254 PM CST Sat Dec 16 2017 An upper level low is currently over western Texas and moving northeastward tonight. Clouds will hang around most of the day on Sunday with temperatures about 10 degrees cooler than today. The area will remain in a pseudo split to zonal flow with a cut off upper level low over the southwestern U.
Some vis reductions are possible with this low ceiling/fog. Another coastal trough may develop by late Sunday to providing another low chance for showers. Min temps tonight drop mainly into the 40s, but expect warmer temps Sunday night with a general onshore flow. Highs will warm only into the lower 60s on Sunday.
A weak warm front will clip the region today. Rain will increase on Sunday as a cold front sags southward into Western Washington.
127 PM PST Sat Dec 16 2017 High pressure will build in over the Great Basin over the next several days with offshore flow and dry conditions over Central California.
High pressure will build in this evening, keeping our weather quiet tonight into Sunday. High pressure will bring dry conditions to our region tonight and Sunday. Initially a mid level wave moving through Pennsylvania will result in the highest pops across the southern half of the forecast area.
An upper level high pressure ridge will move from west to east across TN this afternoon and tonight. Rain chances will increase quickly early Sunday morning as a weakening trough moves out of TX and toward the MS/OH Valley region.
It's all downhill ceiling/visibility-wise from here as the low temperatures and still some dewpoint separation first closes up (100 percent RH) and as the "cold dome" gradually erodes and winds lighten further especially overnight through nearly all of Sunday morning, temperatures and dewpoints will remain steady then rise stubbornly and slowly together through midday.
Last night's cold front brought 1-2 inches of snow to se Oregon, and 1 inch or less to western Idaho.
1255 PM EST Sat Dec 16 2017 High pressure will be over the area through tonight and then shift off the Southeast Coast Sunday.
Lee side low pressure over SW CO and high pressure over the Southeast has tightened the pressure gradient over the region, especially across northeast Oklahoma and far northwest Arkansas, where gusts in the 20 to 30 mph range are occurring as of 10 am. The initial high cloudiness ahead of the now ejecting northern Mexico upper low is spreading over the region. Any lingering rain will be ending early Sunday, but clouds may remain rather stubborn, which will keep temperatures a bit cooler than today, but still above normal for mid December.
Expect this to move north and dissipate through the rest of the afternoon as high pressure builds to the south. Building ridge will lend to a quiet night tonight. For now, with consideration to the differences in the model profiles, will continue to mention a rain/snow mix though there may be a brief window for freezing rain.
319 PM CST Sat Dec 16 2017 A sunny and pleasant day across central and southeast IL with breezy sw winds 10-20 mph and gusts of 20-25 mph giving milder temps in the low to mid 50s, even upper 50s from Springfield and Jacksonville sw. 1025 mb high pressure over GA and sprawled across the southeast states while a cold front extended from central IA thru nw KS to deepening 1000 mb low pressure over se CO. Low pressure is forecast to weaken as it ejects into the central plains by dawn Sunday and eject ne over nw IL by Sunday afternoon. Highs in the low to mid 40s Sunday with ssw winds 5-10 mph, temperature rise held back by overcast skies and light rain.
1117 AM CST Sat Dec 16 2017 A fairly nice start to the weekend is expected across the local area today as a cold front approaches from the north. with a shift and slight increase in winds to a more northeasterly direction around midday as the cold front begins sag across the local area. expect most areas to not experience the cooler air associated with this front until Sunday as the coolest air will still lag the initial frontal passage. where afternoon temperatures will likely begin to feel the effects of this cooler airmass before the time of peak heating comes around. In addition to the cooler air. While cooler air will also be filtering in across the region overnight. A cool start to the extended periods is expected behind this afternoons cold front.
303 PM EST Sat Dec 16 2017 High pressure is moving in for tonight and last into Sunday. A weakening wave of low pressure will move in from the midwest late Sunday. The low pressure over the mid-MS valley will fall apart as it goes into the OH valley and a loss of moisture will kill much of the precip as the feature fills over us and moves eastward Sun night. Many places should stay above freezing. This coming week will see the long-wave upper level trough that has been dominating out weather shift east as a deep trough digs over the Western U.
Offshore high pressure and a coastal thermal trough will support gusty north winds south of Gold Beach into early Sunday morning.
This short wave will quickly move east of the area tonight followed by a weak surface cold front during the day on Sunday.
Clouds will gradually think through the day bu the big benefit of this high pressure will be light winds, so that highs in the mid 30s to lower 40s will feel fairly comfortable.
Focus turns to overnight lows and clearing tonight as much of central and wrn ND clear in the low/mid levels. Sfc boundary associated w/ warm front remains near stationary over valley tonight and which should keep NE zones in the mid teens as well as they barely broke the 20 mark this afternoon. More sunshine still expected on Sunday with areas west of the valley around or just above freezing in all but far northeastern ND, which will remain in the mid to upper 20.
Upper level low over southeastern New Mexico this afternoon is lifting northeast across west Texas bringing with it high clouds across the eastern Texas Panhandle. Associated pressure falls along with lee side troughing has increased pressure gradients across the area, bringing with it downsloping southwesterly winds. Winds in association with this cold front will be northwesterly around 10 to 20 MPH, with high temperatures being near to slightly cooler tomorrow. The long awaited pattern shift has started to show signs of occurring as a longwave trough is currently moving across the Great Basin of the western United States, which is causing the prevalent ridge to break down and push west. Model guidance has indicated that a vort max will pinch off the bottom of this trough, and become a closed low over the desert southwest.
Light southerly flow will develop late in the TAF cycle as the high shifts to the east.
Fog developed after sunrise over portions of the Yakima valley and the Lower Basin of Oregon. Low clouds will persist over the Lower Basin of Washington through today.
Expect this to lift north and dissipate through the rest of the afternoon as high pressure builds to the south. Building ridge will lend to a quiet night tonight. Despite brief ridging aloft locally, a wave ejecting out of the southern Plains will ride over the ridge Sunday afternoon bringing light precipitation back to the area.
Active pattern looks to take hold of the area tomorrow as a cold front moves into the area and stalls for a few days.
Winds will decrease around sunset and remain light until a cold front switches them out of the north overnight tonight. /Issued 239 AM CST Sat Dec 16 2017/ Upper level low over northern Mexico will weaken as it lifts northeast across West Texas today and tonight and then it will move into Kansas by Sunday morning. As this upper low approaches the Panhandles and heights fall today it will help to tighten the pressure gradient and this will allow for south to southwest winds around 25 mph with higher gusts. Another upper level low will drop south into far northwest Mexico by Sunday afternoon. This upper low is now slower than earlier expected, so have taken the pops out for Sunday night for the southern Texas Panhandle.
low level winds will slowly veer and thicknesses will be slowly rising as ridging builds aloft. though cooler conditions at the coast from onshore flow.
318 PM EST Sat Dec 16 2017 High pressure will build into the region tonight and Sunday. Cooler weather returns again late in the week as Canadian high pressure builds southeast into the region. A weak wave in the westerly 500 MB flow aloft pushes into the ridge late Sunday night, and will bring clouds across the CWA overnight.
127 PM EST Sat Dec 16 2017 A weak upper level disturbance will move east of Vermont this evening, allowing for clearing skies as high pressure builds in from northern Ontario.
5 C/km as the upper trough crosses Texas, will mean the atmosphere is supportive of numerous to widespread showers and thunderstorms as the coastal low skirts the Upper Texas coast tonight.
1211 PM EST Sat Dec 16 2017 High pressure builds into the region today through Sunday. It cools down again late in the week as Canadian high pressure builds southeast into the region. Also adjusted winds a bit to put the timing of the highest winds to mid-late afternoon. Previous Discussion: The early morning area of light snow along the midcoast associated with a weak trof will exit by morning. Today will not be as cold ahead of an approaching cold front. Plenty of clouds are expected elsewhere as a cold front moves through the region later in the day. Tonight - High pressure builds across the region behind the cold front allowing clearing skies to take place. Sunday will be a mostly sunny day as high pressure crests over the area.
The rain ends by sunrise, but the low cigs should continue thru midday Sunday. Lee side low pressure over SW CO and high pressure over the Southeast has tightened the pressure gradient over the region, especially across northeast Oklahoma and far northwest Arkansas, where gusts in the 20 to 30 mph range are occurring as of 10 am. The initial high cloudiness ahead of the now ejecting northern Mexico upper low is spreading over the region. Any lingering rain will be ending early Sunday, but clouds may remain rather stubborn, which will keep temperatures a bit cooler than today, but still above normal for mid December.
1001 AM MST Sat Dec 16 2017 High clouds were increasing over the area early this morning ahead of an approaching Pacific trough. Mid and high clouds will continue to spread over the region today as the trough pushes southeastward across the Great Basin. With little low level moisture in the airmass ahead of the front, shower chances over the higher terrain of northeast Utah will hold off until the late morning with chances improving during the afternoon. Though there were timing differences with the latest model runs, they remained consistent in stalling the front over northeast Utah while they trough splits and the lion's share of the energy moves to old Mexico. Clouds thin over the area on Sunday as the southern extension of the trough closes off over northern Mexico and the open trough to the north pushes eastward.
242 PM EST Sat Dec 16 2017 High pressure will build across the Southeast U.
329 PM CDT Sat Apr 7 2018 Skies continue to clear from north to south this evening as unseasonably cold high pressure builds into the southern plains. There may be some very light freezing/frozen precip across parts of far northeast Oklahoma late tonight through mid morning, however no accumulations are expected at this time.
145 PM EDT Sat Apr 7 2018 Aviation An area of high pressure located in the Upper Plains will build gradually east today and into the Great Lakes Region on Sunday.
A cold front moving through north-central Idaho, into west-central and southwest Montana this afternoon and evening will bring gusty winds of 40-50 mph and brief heavy rain, from the Camas Prairie in Idaho east, to the I-90 Corridor in western Montana. The moderate to heavy rain, and gusty winds will quickly shift southeast with the cold front through central Montana this evening after dark, leaving mostly light showers for western Montana.
320 PM EDT Sat Apr 7 2018 High pressure will keep the weather cold and dry through Sunday.
344 PM MDT Sat Apr 7 2018 Current surface analysis shows high pressure over the eastern Dakotas, with low pressure across northern ID. Upper level analysis shows a weakening ridge over the Northern Rockies, with a large upper low off the Pacific NW coast. However, warmer air aloft will be advecting into the area tonight ahead of the low and could bring some light freezing rain from portions of western to south central SD late tonight/early Sunday. Behind the low, gusty northwesterly winds will develop in many areas for the late morning and afternoon.
1214 PM CDT Sat Apr 7 2018 Strong cold front has now pushed all the way down to south TX with Arctic air spilling across the Plains. We will finally see a warm-up commence on Tue as we get into some lee troughing and return flow. Confidence is high that by Wed we will see above normal temps with even warmer readings expected for Thu.
318 PM CDT Sat Apr 7 2018 The cold front cleared the coast late this morning. With the strong north winds in place, area temperatures continue to steadily fall this afternoon with 3 PM readings ranging from the low to mid 40s well inland to the mid to upper 50s at the coast.
356 PM CDT Sat Apr 7 2018 As of 20Z Saturday afternoon northwest mid-level flow remains across the central Plains with troughing in the east and ridging in the west. A mid-level low was encroaching the Pacific northwest coast, west of the ridge. At a surface, a broad ridge stretched from southern Canada to the US/Mexico border. The trough will exit the region Sunday evening, ending all precipitation from west to east late Sunday afternoon and evening. Snowfall amounts look to remain at a trace to maybe as much as a 1/2 inch, with the highest amounts along the KS/NE border.
423 PM CDT Sat Apr 7 2018 Mid levels indicate strong ridging today in the west with a strong closed low coming onshore in the Pacific NW. This will bring a cold front through the area between late morning and early afternoon from north to south. By the beginning of the work week the mid level ridge re-strengthens, but another wave pushes through the main flow in the wake of the low's breakdown.
1243 PM CDT Sat Apr 7 2018 Satl imagery this morning showing a tight circulation situated just off the Pacific NW coastline with an amplified ridge axis up through OR/WA/British Columbia. Meanwhile, a broad broad trof was in place over the cntrl/ern CONUS. strong Canadian high pressure was continuing to build southward into the central Plains. The column will still be cold enough to support all snow through the morning hours before a gradual shift to a mix of snow/freezing rain/rain takes place Sunday afternoon. The GFS and ECM advertise no active weather on the horizon to contend with as an upper level ridge is progged to build in from the west. Conditions then deteriorate after 12Z as the low moves east along the northern Nebraska border with MVFR cigs and vsbys in snow developing.
1128 AM MDT Sat Apr 7 2018 The latest upper-air and water vapor observations had a strong low off the West Coast with ridging onshore and a fairly broad long-wave trough dominating the eastern 2/3 of the CONUS.
Our freeze warning is unchanged with guidance steady on the freezing line. Other low lying areas well North of I-20 in Bowie, Caddo, Bossier and Webster will breifly drop into the lower 30s right at daybreak. The next couple of cold fronts this week look quite dry for anything other than increasing clouds and shifting winds.
503 PM EDT Sat Apr 7 2018 Low pressure will track south of the Gulf of Maine late tonight through Sunday.
1238 PM CDT Sat Apr 7 2018 Light rain, freezing rain, sleet and snow continue across central and south Arkansas. MVFR conditions will become VFR this afternoon and evening as strong high pressure moves into the area. but as high pressure approaches this afternoon and tonight. with the cold front now across SWRN sections of the state. High pressure will settle over the area tonight. This will result in widespread near or below freezing temps for most of the CWA. This will bring warmer temps for Sun afternoon.
149 PM EDT Sat Apr 7 2018 A frontal boundary south of Long Island and into to Mid Atlantic region will become stationary this afternoon as low pressure develops along the front and passes well south and east of the area late tonight into Sunday.
244 PM CDT Sat Apr 7 2018 (Tonight and Sunday) Strong cold air advection continues behind the cold front as a shallow arctic airmass has invaded much of Texas. As of 1 PM, Abilene and Sweetwater both had a temperatures only around freezing, with 40s further south across the southern 2/3 of the area. For Sunday, expect much warmer temperatures due to low level west- southwest flow and 850 MB temperatures of 19 to 23 DEG C.
156 PM EDT Sat Apr 7 2018 Low pressure pressure along a stationary front across the area will move northeast of the area this evening.