Aikyam-Lab/Synoptic-Bench huggingface dataset:
This morning saw the low temperatures a little warmer than yesterday, with isolated pockets of frost west of the Cascades, mostly along the fringes of valleys where cold drainage flow fed down from still snow covered higher terrain. East of the Cascades, where the freezing temperatures are more seasonal for this time of year, results were similar with the coldest freezing temperatures draining down from the Cascades. An upper level trough is currently traversing easter Oregon and high pressure is starting to build in it's wake.
259 PM EDT Sun May 22 2022 A surface cold front is slowly trekking its way across the region and as of the 15Z surface analysis; the front has crossed into the forecast area.
For the end of the week, a trough of low pressure is expected to pass north of Southern California increasing onshore flow bringing cooler, breezier conditions.
A weak cold front will push down into southern Nevada and the Colorado River Valley tonight bringing north breezes and slight cooling. A warming trend will then resume under a building area of high pressure with temperatures climbing about 10 degrees above normal by the middle of the week. North winds with gusts likely between 25 and 35 mph will spread down over northeast Clark County and the Colorado River Valley after midnight tonight through early Monday morning behind a weak cold front. The upper level trough driving the front could be seen on satellite loops swinging over northeast Nevada and it will move across the northern half of Utah this evening and overnight.
349 PM EDT Sun May 22 2022 A cold front will cross the area tonight.
Large area of strong high pressure is centered over much of the Plains this afternoon. with ridging building eastward into the Western Great Lakes. Much of our CWA will see a hard freeze tonight as temps drop to around or below freezing.
Temperatures will actually be warmer farther north and east across the forecast area Monday, thanks to possible sunny breaks in the cloud cover and less coverage of precip. Clouds look to stick around Monday night and with the help of southerly flow, temperatures overnight should remain the low to mid 40s.
Low temps consequently will likely remain in the low 70's or upper 60's. Upper ridge centered to the east of Florida with southwest flow aloft continuing across the region. A mid level short wave trough will be approaching the region from north Ga in the afternoon and evening. Given the high precipitable water, training along frontal focus and upper level support this seems reasonable.
205 PM MDT Sun May 22 2022 19z surface analysis had high over eastern SD with low over the four corners area attached to inverted trough running into central WY. Water vapour matinee had upper low over southwest MT. Effect of this low the main concern. Tonight/Monday, upper low moves east across far northern NE by Monday. Inverted trough moves into the central/southern Plains. Wet bulb zero heights depict a bit of snow over the highest elevations of the Black Hills.
316 PM EDT Sun May 22 2022 High pressure will build east through the Great Lakes and northeast CONUS early this week.
(This afternoon through Monday night) Upper trough over ID today extends SW to Baja. This trough will swing east into WY tonight and SD/NE Monday as the back of it moves across UT/CO. the Lower Trans Pecos and Northeast Permian Basin.
200 PM MDT Sun May 22 2022 Weak upper low exists over central MT with a 90-100 knot jet across southern parts of ID/WY. Main trof will exit to the east tomorrow, but there is a secondary PV max dropping out of the NW tomorrow which will give southeast MT another round of scattered showers and isold TS in the afternoon. Next Pacific trof will bring a few showers to our far west Monday night.
655 PM EDT Sun May 22 2022 High pressure will expand across Lower Mi tonight and will remain centered over the Great Lakes through the day Monday. High pressure will build east through the Great Lakes and northeast CONUS early this week.
The tail end of a cold front that brought us more March like weather than late May weather has largely stalled across TX/LA. This wave will help induce warm advection atop the cooler air at the surface north of the front to bring some potential for showers and a storm or two by 12Z.
1035 PM EDT Sun May 22 2022 A cold front will cross the area tonight.
An upper ridge continues to build into the region as the upper low over Idaho opens into an upper trough and move east. The upper ridge will continue to build with the axis moving closer to the coast into the week.
A broad area of low pressure will stay positioned just to the north of the region over the couple of days, keeping temperatures near normal while skies remain generally clear.
906 PM EDT Sun May 22 2022 A cold front will cross the area tonight.
747 PM EDT Sun May 22 2022 A cold front will push southeast across central PA late this afternoon and evening, accompanied by showers with brief downpours and a few strong to severe thunderstorms, mainly over the Susquehanna Valley and points east. Conditions will dry out tonight through early this coming week as an area of high pressure slides by to our north. This weather feature will bring noticeably cooler temperatures and lower/more comfortable humidity.
543 PM EDT Sun May 22 2022 A cold front will push southeast across central PA late this afternoon and evening, accompanied by showers with brief downpours and a few strong to severe thunderstorms, mainly over the Susquehanna Valley and points east. Conditions will dry out tonight through early this coming week as an area of high pressure slides by to our north. This weather feature will bring noticeably cooler temperatures and lower/more comfortable humidity.
749 PM MDT Sun May 22 2022 Temperatures are a bit warmer than this time yesterday afternoon, but also much breezier across the plains. Satellite and MRMS radar shows moisture increasing over the high country, and this trend will continue into the overnight hours.
920 PM EDT Sun May 22 2022 Little in the way of sensible weather tonight as expansive high pressure over the mid-upper MS Valley continues to make headway across the western Great Lakes. Large area of strong high pressure is centered over much of the Plains this afternoon. with ridging building eastward into the Western Great Lakes. Much of our CWA will see a hard freeze tonight as temps drop to around or below freezing.
526 PM MDT Sun May 22 2022 19z surface analysis had high over eastern SD with low over the four corners area attached to inverted trough running into central WY. Water vapour matinee had upper low over southwest MT. Effect of this low the main concern. Tonight/Monday, upper low moves east across far northern NE by Monday. Inverted trough moves into the central/southern Plains. Wet bulb zero heights depict a bit of snow over the highest elevations of the Black Hills.
436 PM MST Sun May 22 2022 A broad area of low pressure will stay positioned just to the north of the region over the couple of days, keeping temperatures near normal while skies remain generally clear.
H5 s/w trough (easily depictable on GOES water vapor imagery) is beginning to kick ESE out of our southern area of responsibility.
511 PM EDT Sun May 22 2022 A surface cold front is slowly trekking its way across the region and as of the 15Z surface analysis; the front has crossed into the forecast area.
Warming temperatures and quiet weather return for most of the week before our next system brings back cooler weather and breezy winds to NV. A weak upper level low located over the Northern Rockies will slowly drift east as a small jet streak rotates through the upper trough. However, given the dry low levels any precipitation that does fall will be limited to the higher terrain. Monday, as the trough digs southeast, an upper level ridge will begin to move onshore over the west coast. Winds will remain out of the northwest as ridge axis is still well to the west.
This is in advance of a Pacific upper level trough currently over eastern Idaho. Overnight temperatures near freezing are possible for Rawlins, Laramie, Saratoga and the adjacent high valleys, but it should still be 5 to 10 degrees above the recent record/near record lows the last 48 hours.
Warmer conditions expected through at least the middle of the week under developing high pressure.
A surface cold front is slowly trekking its way across the region and as of the 15Z surface analysis; the front has crossed into the forecast area.
750 PM EDT Sun May 22 2022 A cooler airmass will continue to settle into the region tonight into Monday.
644 PM CDT Sun May 22 2022 (This evening through Monday) This evening is expected to remain dry, however cloud cover will be on the increase as low level moisture begins to stream northward in advance of approaching trough. This low level waa will eventually lead to the development of a few showers and thunderstorms, mainly after midnight. Rain chances will continue to increase through the day Monday with the approach of a stronger jet streak rotating around the base of the trough out into the southern Plains.
Winds will begin to back out of the south as an upper low approaches from Wyoming. Low temperatures are forecast to be slightly warmer tonight, but generally still in the 30s; however, as the previous shift noted, the probability of dropping below freezing is low, with only a few areas maxing out around 15%, and most areas at 10% or lower. Scattered showers and storms will expand through much of the forecast area on Monday, as the trough continues to moves through the Northern Plains.
1010 PM EDT Sun May 22 2022 A cooler airmass will continue to settle into the region tonight into Monday.
A few scattered rain and snow showers are expected across the high country of western Colorado with potential for very isolated thunderstorm activity over the higher terrain. Only trace accumulations of snow are expected below the highest peaks. Cooler temperatures and marginal wind/relative humidity values point towards fire weather conditions taking a break Monday behind this front, but marginal conditions in southwest Colorado might require a second look after tonight's package.
/issued 307 PM CDT Sun May 22 2022/ There is quite a temperature gradient across the Midsouth and especially in north Mississippi where a cold front has moved through Tupelo, but has still not exited the Midsouth.
724 PM EDT Sun May 22 2022 A surface cold front is slowly trekking its way across the region and as of the 15Z surface analysis; the front has crossed into the forecast area.
640 PM EDT Sun May 22 2022 A strong cold front will move through the region tonight, and the front will settle offshore on Monday.
Temperatures will be cooler thanks to the frontal passage. Highs will range from the upper 70s/lower 80s in the Delta to the lower to mid 80s in the Pine Belt.
852 PM EDT Sun May 22 2022 Heat and humidity linger through this evening away from the coast before a cold front brings cooler and drier conditions tonight. This cold front will bring the threat for severe thunderstorms this afternoon and evening with the main threats being large hail, damaging winds, and torrential downpours.
To the west a trough remains aloft over the northern Gulf of Mexico. Temperatures remain on the warm side with current temperatures in the lower 80s. Short Term Update - The robust surface through lower level ridge will remain steadfast across Florida through the overnight period. This will ensure that warmer than normal temperatures will persist through the overnight. Moderate to fresh east to southeast breezes will persist through the overnight as a robust ridge sits across the western Atlantic. Continuing from synopsis, high pressure centered just to the southwest of Bermuda will maintain fresh east to southeast breezes across the coastal waters of the Florida Keys through at least mid week.
549 PM EDT Sun May 22 2022 A cold front will cross the area tonight.
854 PM EDT Sun May 22 2022 Lingering showers and thunderstorms will exit the area with a crossing cold front this evening.
729 PM EDT Sun May 22 2022 Lingering showers and thunderstorms will exit the area with a crossing cold front this evening.
Warmer temperatures and less marine layer are expected through the middle of the week under developing high pressure.
406 PM CDT Sun May 22 2022 (Issued 405 PM CDT Sun May 22 2022) Tonight through Monday night: A dry air mass with high pressure overhead will allow for light winds, clear skies, and efficient radiational cooling tonight. There is highest confidence in the lowest temperatures toward central WI, including Marquette, Green Lake, Sauk and Columbia counties where there is a Frost Advisory in effect. There could be patchy frost for other inland locations, especially the low- lying areas. Highs should be in the lower 60s for inland areas but only upper 50s for the lakeshore. Steadier east winds and plenty of mid level clouds will keep us warmer Monday night, so no frost concerns with lows in the mid 40s.
Morning low temperatures in the lower 70s, with upper 60s possible in rural areas. The western Atlantic high pressure will shift slightly to the west along the 30N line through the day.
925 PM EDT Sun May 22 2022 A strong cold front was moving through our region this evening, and it will settle offshore on Monday.
/issued 243 PM CDT Sun May 22 2022/ Increasing low level advection of warm, moist air on low level flow that will veer to southeast and south combined with a pair of upper level short wave troughs will set the stage for a couple of windows of precipitation beginning late tonight. As the second upper trough approaches from northern New Mexico, some organization of initially scattered thunderstorms is expected, taking precip chances into the evening hours.
455 PM MDT Sun May 22 2022 Upper trough axis approaching the northern Rockies this afternoon will dig into the central Rockies tonight and enter the central and northern plains on Monday.
Discussion: Showers and even a few thunderstorms have been able to initiate this afternoon as temperatures warm into the lower 80s. A cold front will continue to advance eastward this afternoon and evening with moisture pooling along it. Temperatures should be much cooler on Monday given a northerly wind, and expected cloud cover/precipitation. Highs are expected to top out in the lower to mid 70s.
1053 PM MDT Sun May 22 2022 Upper trough axis approaching the northern Rockies this afternoon will dig into the central Rockies tonight and enter the central and northern plains on Monday.
221 AM MDT Mon May 23 2022 A low pressure system moving to the south of the forecast area today will bring a chance of showers and thunderstorms at times to Wibaux County. Temperatures will be 5 to 10 degrees warmer as the cold air that brought freezing temperatures for lows over the weekend moves to the east.
358 AM CDT Mon May 23 2022 Key Messages: - Rain showers likely midweek - Weekend warmup Midweek rain showers: Cool, dry, and calm conditions today with high pressure overhead will be replaced by a much more dynamic weather system as we approach midweek. The upper level short wave trough currently located over northern Utah will weaken as it approaches the region tomorrow, but still provide a push of positive vorticity advection across the forecast area (23.
353 AM EDT Mon May 23 2022 Surface analysis places a robust area of high pressure centered in the western Atlantic off the Southeast coast. Temperatures have remained in the lower 80s, and dewpoints have dropped a few degrees since yesterday and are in the lower 70s.
High pressure keep winds light (10kts or less) out of the northeast through the period. High pressure will build east through the Great Lakes and northeast CONUS early this week.
The initial cloud depth will be relatively shallow and beneath warmer temperatures aloft.
302 AM CDT Mon May 23 2022 Low clouds will be moving into the region this morning as a low pressure system moves across the area. Temperatures this morning are much warmer than the past couple nights, ranging from around 40 to 45. Some showers are already starting to form a band from Mobridge to Watertown. Winds today will be out of the south to southeast as the low passes to our north. Areas of north central and central SD could see gusts around 30 kts this afternoon as the low moves out of the region.
Axis of western Atlantic ridge axis will extend into NOFL, maintaining light-moderate SE winds, which will push the ECSB well inland during the afternoon.
1123 PM EDT Sun May 22 2022 A cold front will push southeast across central PA late this afternoon and evening, accompanied by showers with brief downpours and a few strong to severe thunderstorms, mainly over the Susquehanna Valley and points east. Conditions will dry out tonight through early this coming week as an area of high pressure slides by to our north. This weather feature will bring noticeably cooler temperatures and lower/more comfortable humidity.
A low-amplitude ridge aloft will build across the region on Monday evening in the wake of the mid-level wave, and this should result in a brief period of dry weather.
Water vapor imagery shows the axis of the upper trough over the Four Corners as of 2 AM. This upper trough will continue to slowly progress eastward through the day and into the overnight hours. This should change, however, as the upper trough moves closer to the FA and lapse rates begin to steepen.
144 AM EDT Mon May 23 2022 A cold front from New York to Virginia to Mississippi will push east tonight, then stall across the southern Appalachians and Carolinas. This will result in abundant cloud cover the next several days, introduce cooler temperatures, and increase the opportunity for widepspread rain. Wetting rain likely Monday with higher humidity and cooler temperatures. Surface cold front extends from western NY/PA to western VA to Mississippi. Passage of the surface cold front will put us on the cool side of the boundary with models indicating temperatures struggling to get out of the 60s. A mid- and upper-level ridge will continue to spin off the southeast coast through the period.
1042 PM MDT Sun May 22 2022 19z surface analysis had high over eastern SD with low over the four corners area attached to inverted trough running into central WY. Water vapour matinee had upper low over southwest MT. Effect of this low the main concern. Tonight/Monday, upper low moves east across far northern NE by Monday. Inverted trough moves into the central/southern Plains. Wet bulb zero heights depict a bit of snow over the highest elevations of the Black Hills.
258 AM EDT Mon May 23 2022 Current surface analysis shows broad area of high pressure centered over the Upper Midwest building into the OH Valley, while across the Deep South a wave of low pressure rides northeast along a stalled out frontal boundary.
259 AM MDT Mon May 23 2022 Increased winds near sunrise to near 50 mph as the low level wind field increases in strength in part due to the low level jet. Upper trough axis approaching the northern Rockies this afternoon will dig into the central Rockies tonight and enter the central and northern plains on Monday.
1102 PM EDT Sun May 22 2022 A cold front brings cooler and drier conditions overnight.
214 AM MDT Mon May 23 2022 A gradual warming trend will continue today, as a trough axis holding cold air aloft, slides into the Dakotas. Small scale ridging should keep the rest of the area dry.
300 AM CDT Mon May 23 2022 A weak upper level ridge will move east through the area today as low pressure moves from Colorado onto the Plains, but appears to be weakening as it does. With this somewhat stubborn ridge the low levels will remain with a southeast component to the wind. CAPE values of about 100 J/kg may allow for a couple rumbles of thunder and with freezing levels at about 5000 ft AGL maybe a little pea sized hail. Otherwise south winds of 10 to 20 mph and increasing clouds will see highs top out mainly in the lower 60s, possibly some 50s in south central SD where clouds arrive sooner.
1129 PM EDT Sun May 22 2022 A cold front will cross the area tonight.
H5 s/w trough (easily detectable on GOES water vapor imagery) is beginning to kick ESE out of our southern area of responsibility.
Latest surface analysis shows high pressure settled over the western Great Lakes. Temperatures will be a little warmer today with highs in the mid 60s.
For the end of the week, a trough of low pressure is expected to the north increasing onshore flow bringing cooler, breezier conditions. A ridge of high pressure will shift eastward from the Pacific, replacing the trough of low pressure that has been bringing us cool, cloudy, and breezy conditions.
244 AM EDT Mon May 23 2022 Upper air pattern consists of a broad 500 mb trough over most of the U. As ridging moves out of the area tonight, expect anomalously low temps across the area. As skies clear out tonight, widespread frost is expected throughout Upper MI, particularly inland from the Great Lakes as low temps drop into the low 30s to upper 20s. As we move into Monday, expect some WAA over us as a high pressure scoots eastwards over Lower MI. Highs Monday could get into the low 60s in the inland areas, whereas shorelines are probably only going to reach the upper 50s before a lake breeze moves inland and moderates temps. However, given the light winds and cooler temps, fire wx shouldn't be that big of a concern.
This has kept temps warmer overnight. MU CAPES in the 700-1000 j/kg range anticipated, with NAM guidance on the higher end and GFS and model blends more in the 750 j/kg range.
Dry air at h750-700mb will move into wrn Nebraska as the upper low across WY this morning, moves through Nebraska today, and into SD tonight.
115 AM EDT Mon May 23 2022 A cooler airmass will continue to settle into the region tonight into Monday.
The high cloud is expected to persist in some fashion today, but will remain transparent especially with time of year/sun angle.
Isolated showers in central Idaho will continue to weaken and end this evening as an upper trough moves eastward and away from the area. The next upper trough will move into the area Monday afternoon and support showers and a slight chance of thunderstorms across the north, from Baker County to the West Central Mountains. Temperatures will be a few degrees warmer with highs slightly below normal.
1101 PM CDT Sun May 22 2022 (This evening through Monday) This evening is expected to remain dry, however cloud cover will be on the increase as low level moisture begins to stream northward in advance of approaching trough. This low level waa will eventually lead to the development of a few showers and thunderstorms, mainly after midnight. Rain chances will continue to increase through the day Monday with the approach of a stronger jet streak rotating around the base of the trough out into the southern Plains.
1152 PM EDT Sun May 22 2022 Little in the way of sensible weather tonight as expansive high pressure over the mid-upper MS Valley continues to make headway across the western Great Lakes. Large area of strong high pressure is centered over much of the Plains this afternoon. with ridging building eastward into the Western Great Lakes. Much of our CWA will see a hard freeze tonight as temps drop to around or below freezing.
Cooler and drier air will be reinforced on the western side of the system/northern side of the front today. The temperature forecast today is somewhat uncertain with the possibility for low clouds to hang on later in the day, but I trended temps a little cooler while still allowing for some breaks in the clouds.
232 AM EDT Mon May 23 2022 As high pressure settles into the Great Lakes, cooler conditions are expected in the Ohio Valley today, with just a chance of some showers in southern Ohio and northeast Kentucky.
An area of low pressure has moved north from the central Gulf of Mexico into the Florida Panhandle. Helping to funnel this low pressure area into Alabama this morning is an area of high pressure to the east off the Florida coast and a broad mid /upper-level trough over the southern Plains. Present indications are that this low pressure feature will continue to move northward and eventually northeast across Alabama and into the southern Appalachians -- roughly paralleling the I-59 corridor.