Aikyam-Lab/Synoptic-Bench huggingface dataset:
401 PM CDT Thu Jun 17 2021 Today will be our hottest day of this hot stretch and then a cool front that is sagging south this afternoon/evening will bring cooler, if you can call it that, weather for Friday into the Weekend. Highs on Friday in the Tri-Cities will be around 10 degrees cooler than today with generally lower 90s expected. The cold front will stall out across north central Kansas on Friday. However, can not completely rule out an isolated thunderstorm or two along or north of the cold front tonight through Friday. Although cooler than today we will still see highs in the 90s.
453 PM PDT Thu Jun 17 2021 Updated Air Quality Issues section Dangerously hot conditions will continue across the area through the weekend as a large area of high pressure remains over the region. Mid-level moisture moving around the ridge will bring isolated showers and thunderstorms mainly over the high Sierra through Friday.
Temperatures were slightly adjusted to be lower, due to observations trending cooler.
830 PM EDT Thu Jun 17 2021 High pressure will dominate the region through Friday. Hotter and more humid air will return as the high pressure shifts offshore through the weekend.
The additional drying combined with the considerable mid and high level clouds limiting the instability, kept convective coverage on the low side today. Skies will remain mostly cloudy overnight with low temperatures in the low- mid 70s. Winds will then gradually become E/SE tomorrow as ridge axis lifts northward and the east coast sea breeze pushes inland.
649 PM CDT Thu Jun 17 2021 Today will be our hottest day of this hot stretch and then a cool front that is sagging south this afternoon/evening will bring cooler, if you can call it that, weather for Friday into the Weekend. Highs on Friday in the Tri-Cities will be around 10 degrees cooler than today with generally lower 90s expected. The cold front will stall out across north central Kansas on Friday. However, can not completely rule out an isolated thunderstorm or two along or north of the cold front tonight through Friday. Although cooler than today we will still see highs in the 90s.
959 PM EDT Thu Jun 17 2021 High pressure will be centered over the region tonight before drifting east and off the Middle Atlantic Coast on Friday.
526 PM MDT Thu Jun 17 2021 High pressure continues to build off towards the eastern seaboard as a nearly stationary frontal boundary draped across the Laramie Range. Models have continued to trend towards some relief from the record breaking heat as the blocking pattern degrades towards zonal to northwest flow.
Tomorrow's weather will be a slightly warmer and more humid version of today.
Routine afternoon cumulus development is expected, and ceilings may begin to fall in our southeastern zones by 19/00Z as the leading edge of Potential Tropical Cyclone 3 begins to approach our area. Until the disturbance's closest approach, ridging will have the predominant influence over conditions across the Ark-La-Tex, suppressing chances of precipitation outside of our southernmost zones. With that said, this moisture will stay south of the I-20 corridor for the night, keeping lows in the low 70s.
A weak area of high pressure in place over much of the SE region should maintain quiet/mild wx conditions thru the evening/overnight periods. With light/var winds and ideal radiational cooling conditions, temps should continue to fall into the lower/mid 60s heading into the early morning hrs Fri. High temperatures should rise into the lower 90s with winds becoming southerly in the 5 mph range.
/issued 224 PM CDT Thu Jun 17 2021/ Clear skies abound again this afternoon as the upper high remains centered in essentially the same position as it has been all week. Further flattening of the ridge will be a slow process, however, with guidance in agreement that anticyclonic upper flow will continue over the western CONUS throughout the short term period. The increased zonal extent of the ridge axis will keep upper level flow mainly easterly over the CWA through Friday morning, although at a magnitude below 20kt and with minimal practical effect on surface weather. However, this will have little impact on sensible weather locally as the low to midlevels will continue to warm and and will remain largely dry. A stagnant upper level ridge near the four corners will slide to the southwest this weekend.
329 AM EDT Fri Jun 18 2021 Summer heat returns today as strong SW flow develops ahead of a cold front that won't make it. Modest return flow already setting up, so even with clear skies and dewpoints in the lower 60s, some of our more mixy locations are still in the lower/mid 70s. With moisture advection pushing dewpoints into the lower 70s, that will result in heat indices just over 100 degrees this afternoon in southern Indiana. By late afternoon/early evening, the approaching cold front will light up with convection across central Indiana.
Low pressure was located over northeastern Manitoba this afternoon with a cold front trailing across northwestern Ontario to western Lake Superior, northwest Wisconsin and into southwestern Minnesota. A few showers were developing from the Brainerd Lakes area into northwest Wisconsin late this afternoon and this trend is expected to continue into early evening until the cold front clears the area. Weak high pressure will move through the region on Saturday bringing lighter winds and slightly higher RH values.
Clear skies and dry weather with high pressure continue early this morning. SPC has outlooked far western portions of the area with an Enhanced Risk, while a Slight Risk covers the remainder outside of the ridges. Showers and thunderstorms are likely again Saturday as the slow- moving sfc cold front crossed the Upper Ohio Valley region.
Friday sees another cold front push across the region, associated with a clipper type system. A broad trough pattern with a weak warm front/cold front type pattern looks to set up this weekend. As a cold front moves through Saturday evening through the night, showers and thunderstorms are possible.
408 AM EDT Fri Jun 18 2021 High pressure will move offshore today.
228 AM MDT Fri Jun 18 2021 A weak cold front, which moved just south of the Canadian border around midnight, will slip south and back door across our CWA today. An upper trough from British Columbia will track south/southeast into our region late Saturday and Saturday night. This will push an associated cold front into our northern zones late Saturday afternoon. The cold front will move through the forecast area through Saturday night.
1218 AM CDT Fri Jun 18 2021 (This evening through Friday) Hot and dry conditions will persist across the area through Friday, with high pressure aloft dominating.
On Saturday, a short wave trough moving southeast from Colorado may help to bring thunderstorms a little further into the Panhandles by evening.
While afternoon highs look to remain in the upper 80s to low 90s, expect dewpoints to be notably cooler, with values in the 40s and 50s. Look for unsettled weather to return to the forecast Saturday afternoon as a pronounced upper level trough glides over the Northern Great Plains and International Border.
Furthermore, wet bulb globe temperature should be in the low to locally moderate category (generally less than 88).
A very disorganized system in the Gulf of Mexico is expected to gradually form into a tropical cyclone as it nears the south central Louisiana coast on Friday night/early Saturday. Therefore, main impacts will be on the right side of the track of the low center, mainly northeast and east. Thus, with the official track of the potential tropical cyclone, main impacts will be in south central Louisiana, with the strongest winds confined likely to along the coast and offshore. The heavy rain threat will also be to the east of the track, so a majority of the heavy rain should be east into southeast Louisiana, although a stray rain band could bring the potential of heavy rainfall for the lower Atchafalaya Basin.
327 AM EDT Fri Jun 18 2021 Summer heat returns today as strong SW flow develops ahead of a cold front that won't make it. Modest return flow already setting up, so even with clear skies and dewpoints in the lower 60s, some of our more mixy locations are still in the lower/mid 70s. With moisture advection pushing dewpoints into the lower 70s, that will result in heat indices just over 100 degrees this afternoon in southern Indiana. By late afternoon/early evening, the approaching cold front will light up with convection across central Indiana. Friday night a cold front will be slowly dropping south across the Midwest and Great Lakes.
Weak high pressure will remain across the Carolinas and Georgia tonight and then gradually move off the coast on Friday. By late tonight, the high shifts to the coast with weak moisture return over the CSRA and far southern Midlands toward daybreak. Overnight lows will again be below normal with readings in the low to mid 60s. The trough will be well to our east by Friday morning with a wide pressure gradient across the southeast.
1115 PM MDT Thu Jun 17 2021 High pressure continues to build off towards the eastern seaboard as a nearly stationary frontal boundary draped across the Laramie Range. Models have continued to trend towards some relief from the record breaking heat as the blocking pattern degrades towards zonal to northwest flow.
Cannot rule out a stray shower or storm this aftn in this area, mainly in the higher terrain, but wl keep the fcst dry as any activity wl be isolated at best.
This was all due to a vigorous mid-level trough pushing through and interacting with very muggy airmass in place (precipitable water values in the 1. Otherwise, another very warm but drier airmass filters into the area today as high pressure moves in from the Northern Plains. Models showing northwest flow aloft ushering in a trough of low pressure and decent packet of 500-300mb pv-advection Friday night. High pressure rebuilds into the area Saturday for what looks to be a very pleasant day with highs in the mid-70s to mid-80s. Will see showers and thunderstorm chances move into the area after midnight Saturday night in warm air/moisture advection ahead of low pressure heading east across the Plains.
439 AM EDT Fri Jun 18 2021 Early this morning a strong upper level high was centered over the four courners region, with ridging extending eastward over the Tennessee Valley. Troughing was just north of the U. At the surface, a cold front was laid out from CO to the upper Great Lakes.
Temperatures along the island chain are in the lower to mid 80s with dewpoints in the mid to upper 70s. Although there are tropical concerns over the Gulf of Mexico, with a potential tropical cyclone and expectations for a sloppy and wet system moving into the northern Gulf Coast over the next few days, weather across the Florida Keys will remain rather quiet. The developing low pressure system will retain enhanced breezes today through at least Saturday, with breezes peaking tonight back in the high end of 15 to 20 knots.
331 AM CDT Fri Jun 18 2021 Early this morning, the upper level ridge remained across the southwest CONUS stretching into the central and southern Plains. At the surface, a pair of low pressure centers were present: the first over central Iowa and the second over eastern Colorado. Decreased winds and slightly cooler low level temps will keep temperatures a few degrees cooler Saturday; highs will top out in the mid to upper 90s.
251 AM CDT Fri Jun 18 2021 It will be another hot day today across the region as upper level ridging continues to dominate. Ridge will begin to break down and slide back westward some beginning today and into the weekend thanks in part to a landfalling tropical system along the Gulf Coast. Saturday should see temperatures come down a couple more degrees as the ridge slides further west.
On Saturday, the weak front will stall out somewhere across southwest Kansas, so the highest temperatures on Saturday will most likely be confined to areas closer to the Oklahoma border (101-103F) or so, while most of the rest of the western Kansas region will see afternoon highs top out around 98 to 100F or so.
Clear skies and dry weather with high pressure continue early this morning. Showers and thunderstorms are likely again Saturday as a sfc cold front moves south across the Upper Ohio Valley region.
456 AM EDT Fri Jun 18 2021 Early this morning a strong upper level high was centered over the four corners region, with ridging extending eastward over the Tennessee Valley. Troughing was just north of the U. At the surface, a cold front was laid out from CO to the upper Great Lakes. A couple of cold fronts and a strong upper level trough will be the weather makers in the extended. The extent of precipitation associated with the first cold front is in question due to uncertainty in the model data.
A broad area of low pressure called Potential Tropical Cyclone Three by the NHC was across the southwestern Gulf of Mexico early this morning, and this feature is still forecast to become a Tropical or Subtropical Storm before it moves into Louisiana tonight or Saturday morning. Upper level heights over the area will remain relatively constant at 589-590 dm as upper level high pressure remains in control, and this will keep mid/upper level dry air across the region. Highs today will be near 90 to the lower 90s, with overnight lows in the low to mid 70s.
An upper level ridge will be centered near the Four Corners region.
A return to southerly flow will bring dewpoint temperatures back into the mid to upper 60s and afternoon highs in the low 90s.
1215 AM EDT Fri Jun 18 2021 High pressure will dominate the region today. Hotter and more humid air will return as the high pressure shifts offshore through the weekend.
200 AM CDT Fri Jun 18 2021 Overall things will remain quiet today into tomorrow morning as we continue to be dominated by upper ridging. Temps will be a degree or two warmer today as thicknesses increase slightly with overnight lows responding in the same manner. Surface lee troughing will keep surface winds mostly out of the south to southeast through much of the day. The summer doldrums will continue into the weekend even as the Four Corner's upper high retreats southwestward.
High pressure located over the Four Corners region will continue to influence weather across North and Central Texas through the short term period, resulting in rain-free, hot, and sunny weather.
Some rain chances exist across southeast portions of the state as the potential tropical cyclone progresses northeast and inland from the Gulf of Mexico.
416 AM EDT Fri Jun 18 2021 Warmer and more humid today with showers and thunderstorms moving into the area late in the day and persisting overnight.
A cold front will stretch southwestward from Michigan to Arkansas. The Atlantic coast will have upper-level ridging while the middle half of the country has an upper-level trough. The GFS has a deeper and faster moving trough which also places the cold front just northwest of the CWA in the early morning and near the Ohio River midday.
The upper trough over the eastern third of the country that brought pleasant temperatures and low humidity the last few days is now shifting to the east coast with ridging from central states upper level high edging towards the Tennessee Valley. A frontal boundary to the northwest over the central plains will slide southeast into the Ohio Valley may move a some clouds into southwest Virginia and northern Tennessee but overall high pressure should stay in control with mostly clear skies overnight. Lows tonight will be much warmer as moisture increases and be in the 60s.
The heat really cranks up this afternoon, with upper 80s on the Plateau to the low 90s everywhere else.
- Thunderstorms are possible late this afternoon into the overnight hours across northern MO along a cold front that is slowly moving southward. 1000-850 mb thickness values and 850 mb temperatures will be similar to yesterday and possibly shifted slightly southward as the ridge continues to flatten out.
1248 AM EDT Fri Jun 18 2021 High pressure will prevail through Saturday.
Today will be our hottest day of this hot stretch and then a cool front that is sagging south this afternoon/evening will bring cooler, if you can call it that, weather for Friday into the Weekend. Highs on Friday in the Tri-Cities will be around 10 degrees cooler than today with generally lower 90s expected. The cold front will stall out across north central Kansas on Friday. However, can not completely rule out an isolated thunderstorm or two along or north of the cold front tonight through Friday. Although cooler than today we will still see highs in the 90s.
Tonight, lows fall into mid 50s to lower 60s as the passing upper trough swings some CAA and cooler temps into the area. Models continue to vary slightly on the timing of both the leading wave/WAA and the trailing upper trough, and so have maintained a blend of pops through the weekend.
210 AM CDT Fri Jun 18 2021 Subtropical ridge across the 4-Corners area today is broad enough to keep the mid-level wlys pushed well to the n and as such the MSLP pattern is fairly diffuse across W TX/SE NM. As the aforementioned ridge builds swwd Sun the mid-level wlys will drop farther s opening the door for the possibility of a summer front Mon. A warm-up will follow Wed-Fri with possibility of remnant mid-level theta-e ridge trapped within or on the periphery of the upper anticyclone favoring precip across the w.
307 AM CDT Fri Jun 18 2021 The period starts out with the region in northwesterly flow aloft as upper level high pressure sits over most of the southern half of the CONUS while an upper level Canadian low churns over Ontario. This low will gradually dig down to the southeast through the period. Overall, mostly dry conditions are expected before thunderstorm and shower chances enter towards the tail end of the period ahead of a warm frontal boundary. As surface pressure pushes off to the east during the day Saturday, low pressure over Wyoming will work towards the area. An associated warm frontal boundary (as previously mentioned) during the afternoon may lead to some precipitation chances ahead of the front.
221 AM PDT Fri Jun 18 2021 Widespread triple digit heat expected for the lower elevations into this weekend. Strong high pressure continues to be centered around the four corners area that will lead to another very hot day for the interior. Temperatures are expected to peak today with temperatures near or slightly warmer than Friday's highs. A strong thermal belt will continue tonight keeping some of the warmer foothill locations very warm tonight only cooling off into the mid 70s to lower 80s. The rest of the lower elevations will cool off into the mid 60s to mid 70s with the Delta cooling into the lower 60s.
335 AM MDT Fri Jun 18 2021 Upper ridging continues across the SW CONUS, with WNW flow aloft over the northern High Plains.
Summer heat returns today as strong SW flow develops ahead of a cold front that won't make it. Modest return flow already setting up, so even with clear skies and dewpoints in the lower 60s, some of our more mixy locations are still in the lower/mid 70s. With moisture advection pushing dewpoints into the lower 70s, that will result in heat indices just over 100 degrees this afternoon in southern Indiana. By late afternoon/early evening, the approaching cold front will light up with convection across central Indiana.
Early this morning, the upper level ridge remained across the southwest CONUS stretching into the central and southern Plains. At the surface, a pair of low pressure centers were present: the first over central Iowa and the second over eastern Colorado. Decreased winds and slightly cooler low level temps will keep temperatures a few degrees cooler Saturday; highs will top out in the mid to upper 90s.
1052 AM EDT Fri Jun 18 2021 Shower and thunderstorm chance returns this afternoon through Saturday with crossing low pressure. SPC has outlooked far western portions of the area with an Enhanced Risk, while a Slight Risk covers the remainder outside of the ridges. Showers and thunderstorms are likely again Saturday as the slow- moving sfc cold front crossed the Upper Ohio Valley region.
Early this morning a strong upper level high was centered over the four corners region, with ridging extending eastward over the Tennessee Valley. Troughing was just north of the U. At the surface, a cold front was laid out from CO to the upper Great Lakes. A couple of cold fronts and a strong upper level trough will be the weather makers in the extended. The extent of precipitation associated with the first cold front is in question due to uncertainty in the model data.
VFR conditions early this morning with mostly clr skies in advance of Potential Tropical Cyclone 3 moving north acrs the cntl Gulf.
A broad low amplitude ridge is currently centered over the northwestern CONUS, with North Dakota on it's eastern slope. With the cold front moving through today, expect cooler temperatures north (upper 60s to mid 70s) with the warmer temperatures (80s) south.
Eyes still on the development of Potential Tropical Cyclone Three as is moves northward toward the north-central Gulf coast, well east of the CWA.
518 AM MDT Fri Jun 18 2021 Upper ridging continues across the SW CONUS, with WNW flow aloft over the northern High Plains.
508 AM MDT Fri Jun 18 2021 Currently a weak surface front is making its way across southeast Wyoming and western Nebraska bringing cooler temperatures into the forecast for today with high temperatures in the 70s and lower 80s with lows tonight in the 50s and 60s.
441 AM CDT Fri Jun 18 2021 Potential Tropical Cyclone 3 (PTC3) is still forecast to become a tropical or subtropical storm later today as it approaches the southeast Louisiana coast before crossing the area overnight tonight and Saturday. Main threat continues to be heavy rainfall, mainly to the east of the track of the low.
608 AM CDT Fri Jun 18 2021 The period starts out with the region in northwesterly flow aloft as upper level high pressure sits over most of the southern half of the CONUS while an upper level Canadian low churns over Ontario. This low will gradually dig down to the southeast through the period. Overall, mostly dry conditions are expected before thunderstorm and shower chances enter towards the tail end of the period ahead of a warm frontal boundary. As surface pressure pushes off to the east during the day Saturday, low pressure over Wyoming will work towards the area. An associated warm frontal boundary (as previously mentioned) during the afternoon may lead to some precipitation chances ahead of the front.
Right now, the 500mb ridge remains centered over the four corners region. Through friday night, the ridge will slowly lose some of its influence over the area as a trough digs into it from the north. Near the surface, a frontal boundary and broad area of low pressure is currently in Southern Nebraska and will slowly move south into the area through the period. While dewpoints are dropping, heat index values are already in the low 100's. The lows for tonight are expected to be in the 60's with 70's east of highway 83. High pressure remains aloft over the far southwest U.
226 AM PDT Fri Jun 18 2021 Widespread triple digit heat expected for the lower elevations into this weekend. Strong high pressure continues to be centered around the four corners area that will lead to another very hot day for the interior. Temperatures are expected to peak today with temperatures near or slightly warmer than Friday's highs. A strong thermal belt will continue tonight keeping some of the warmer foothill locations very warm tonight only cooling off into the mid 70s to lower 80s. The rest of the lower elevations will cool off into the mid 60s to mid 70s with the Delta cooling into the lower 60s.
High temperatures should easily reach the lower 90s in valley area based on current temps in the upper 70s to around 80 at 14Z.