Aikyam-Lab/Synoptic-Bench huggingface dataset:
1003 AM EDT Mon Jun 19 2023 Low pressure will exit across the Maritimes today. High pressure will build toward the region Tuesday and crest overhead into late week. Surface/upper level low pressure will exit across the Maritimes today, while upper level troffing in the wake of the system remains across the region. High temperatures will range from around 60 to the lower 60s north, to the lower to mid 60s Downeast. Temperatures will slip back into the low to mid 40s across the north with upper 40s to low 50s across southern zones. Otherwise, Tuesday will turn out partly cloudy and a bit warmer than recent days.
At the same time the main upper low will begin to slide into the area from north to south. With the low we will periodic showers and perhaps a storm. As we get into Tuesday, the upper low will be the dominate feature and we will once again see periodic showers and perhaps a few storms.
Look for another warm and humid night with overnight lows in the lower 70s along the Nature Coast and remaining in the upper 70s to lower 80s for coastal regions.
530 AM EDT Mon Jun 19 2023 Outside of high clouds, skies will remain ceiling free in the low- mid levels with light easterly flow. Over the next couple of days a mid level ridge axis will amplify/expand across the Upper Midwest and northern Great Lakes region in response to long wave troughing diving across the western US. A blocked pattern will emerge which will cause the upper low now centered over the Lower Ohio Valley to slowly sink southward across the Lower Tennessee Valley into the deep south by mid week. While high clouds will be rather extensive across Se Mi today, they will dissipate on Tuesday as the building mid level ridge exerts more influence across the region.
Upper low has settled across the OH Valley region, while a sfc remains positioned along the mid KY/TN state border. Breaks in this cloud cover should develop later today, although this still may have some effect on solar insolation this afternoon, with highs expected to be more in the lower/mid 80s for most spots.
728 AM EDT Mon Jun 19 2023 Aviation A developing rex block will mean dry weather through Tuesday as the upper high moves across the Great Lakes. No precip is expected through Tuesday although there will be a slight increase in moisture as the upper low begins to move north. A rex block high will be positively tilted up and over a large quasi stationary upper level low that will remain over Kentucky and Indiana through most of the week.
627 AM CDT Mon Jun 19 2023 (Today and tonight) The upper ridge builds over central Mexico today with westerly flow aloft.
500 AM MDT Mon Jun 19 2023 Key messages: - Hot and dry weather today and most of tomorrow with elevated fire weather conditions possible - Showers and thunderstorms develop tomorrow with marginal severe threat - A more active weather pattern through the end of the week will bring chances for heavy rain to the region Current upper air analysis and water vapor imagery depict broad trough over the Pacific Northwest. Amplifying upper level ridge over the central CONUS and strong WAA at the sfc will contribute to a hot and dry day across the CWA today. The low shear will prevent updrafts from being too persistent, however the steep lapse rates and high CAPE will lend to storms capable of damaging winds and scattered large hail.
A broad upper level trough over the West will keep cool and breezy conditions over the region through mid-week.
514 AM EDT Mon Jun 19 2023 Weak surface and upper level ridging will slide east across the region today, bringing fair, warm weather and a light southeasterly breeze. A few afternoon showers or thunderstorms will be possible across the southwest part of the state later this afternoon and evening, and along a weak surface cold front that will be across the Northern Mountains Tuesday afternoon.
625 AM CDT Mon Jun 19 2023 (Today through Tuesday afternoon) Upper ridge centered over Nrn Mexico extends north across TX and NM producing unseasonably hot wx for the region. An upper trough along the West Coast tries to lift NE but will have little effect on the area as the ridge remains entrenched and if anything actually strengthens over the region Tuesday.
758 AM EDT Mon Jun 19 2023 Moisture slowly increases across the area, especially as an upper low cuts off and spins to our west through midweek. with trough digging into the PAC NW and a cutoff developing over the SE and a sharp ridge in between. The cutoff will develop a surface reflection over TN/KY, a warm front extending to its southeast. Surface warm front approaches tonight but does stall just south of the area. At the surface a coastal trough will develop and be in place seemingly a feature for intervals of weak isentropic lift. seemingly taking a back seat to the moisture will see smaller diurnal variation with highs mainly in the lower 80s or so and lows within a degree or two of 70. The closed low lifts and more of a shallow trough remains to the west.
619 AM CDT Mon Jun 19 2023 (Today through Tuesday Night) Dangerous heat should continue through the first half of this week as an Upper level ridge remains positioned over the Southern Plains/Mexico. 500mb heights within the midlevel ridge should remain around 594-596 dam through Tuesday night. 850mb temperatures are still expected to range between 22-28C during this time frame, with southwesterly flow present in the lower levels. Dewpoints are largely expected to remain in the mid 70s to lower 80s, though afternoon mixing could bring them into the lower 70s.
446 AM PDT Mon Jun 19 2023 A broad upper level trough over the West will keep cool and breezy conditions over the region through mid-week.
712 AM EDT Mon Jun 19 2023 Weak surface and upper level ridging will slide east across the region today, bringing fair, warm weather and a light southeasterly breeze. A few afternoon showers or thunderstorms will be possible across the southwest part of the state later this afternoon and evening, and along a weak surface cold front that will be across the Northern Mountains Tuesday afternoon.
Showers for the interior are possible again late in the week as an additional lobe of low pressure swings over the area. As an upper level trough moves into the area, light rain has accumulated in Humboldt and Del Norte. Instability is also accompanying the trough as it digs through, raising the NBM probability of lightning to 20% for N Trinity, Humboldt, and Del Norte.
517 AM EDT Mon Jun 19 2023 Weak surface and upper level ridging will slide east across the region today, bringing fair, warm weather and a light southeasterly breeze. A few afternoon showers or thunderstorms will be possible across the southwest part of the state later this afternoon and evening, and along a weak surface cold front that will be across the Northern Mountains Tuesday afternoon.
622 AM CDT Mon Jun 19 2023 (Today) Clear and quiet conditions are expected for most of the area tonight with low temperatures in the low to mid 60s.
709 AM EDT Mon Jun 19 2023 Weak surface and upper level ridging will slide east across the region today, bringing fair, warm weather and a light southeasterly breeze. A few afternoon showers or thunderstorms will be possible across the southwest part of the state later this afternoon and evening, and along a weak surface cold front that will be across the Northern Mountains Tuesday afternoon.
616 AM CDT Mon Jun 19 2023 An upper level low pressure system will move from the lower Ohio River Valley to Alabama and Georgia through midweek. High temperatures through midweek will range from the lower 80s near the Tennessee River to around 90 degrees over east central Arkansas and northwest Mississippi.
1244 PM EDT Mon Jun 19 2023 High pressure over eastern Canada will keep dry weather in place through tonight.
The precipitation is developing along the leading edge of a cold upper low just off the Oregon coast. The low had been moving more south than east early this morning which has slowed the expected advancement of rain/snow. More recent satellite pics show the low has recently starting tacking eastward so do expect precipitation development to shift further up the Snake Plain and into the Boise mountains through early afternoon before breaking apart.
(This evening through Tuesday) Upper level ridging will remain overhead tonight and Tuesday.
An upper low will slide southward over the SE United States. This will keep us cooler than normal and will be a source for diurnally driven showers and storms this week.
156 PM EDT Mon Jun 19 2023 High pressure over eastern Canada will keep dry weather in place through tonight.
A low pressure system is moving through the Ohio River Valley today, bringing isolated chances for showers for the far southeast CWA this afternoon and evening. On Tuesday, the aforementioned area of low pressure becomes cutoff and remains over the Ohio River Valley. An upper level ridge will begin to build across the Plains. We remain sandwiched between the upper level ridge in the central CONUS and the cutoff low in the Ohio River Valley for the remainder of the work week.
353 PM EDT Mon Jun 19 2023 High pressure will dominate our weather much of the week. Otherwise, fair weather tonight with weak ridging across the region.
However, strong winds will peak today as a deep area of low pressure settles over the Pacific Northwest. This low will keep temperatures below normal through the week. Outside of the winds, cooler temperatures return as the system moves through.
Drier conditions will also continue and allow overnight lows to drop into the low to middle 60s tonight and tomorrow night.
This is due to the closed upper low that is anchored over central TN. A stronger vort lobe will rotate around the low sliding southwestward over southern Illinois.
Deep mid to upper level troughing remains dominant across the eastern CONUS. A deep upper level trough is pushing away from the Northeast states while an additional upper low is deepening and pushing towards the Southeast this afternoon. High temperatures will be in the lower 90s today and tomorrow with heat indices pushing into the lower 100s.
The main upper level pattern of ridging across the plains and western Great Lakes coupled with a cutoff upper low over the Ohio Valley will remain largely stagnant into Tuesday. The ridge will strengthen and expand eastward through Tuesday night, which will keep the influence of the upper low largely removed from our area.
1228 PM CDT Mon Jun 19 2023 (Today and tonight) The upper ridge builds over central Mexico today with westerly flow aloft.
1219 PM CDT Mon Jun 19 2023 (Today and tonight) Building ridge begins to assert its dominance across the southern Plains today as heights rise rather quickly today as 595 dam ridge builds northward.
329 PM CDT Mon Jun 19 2023 The short term forecast period will be dominated by a stalled out low pressure system meandering through the Kentucky-Tennessee area. With northerly winds, highs will primarily be in the lower half of the 80s.
257 PM CDT Mon Jun 19 2023 (Issued 257 PM CDT Mon Jun 19 2023) Tonight through Tuesday night: High pressure to the east northeast of the area will continue to bring dry conditions. Highs in the middle to upper 80s are expected for Tuesday, with cooler 70s near the lake.
Tonight, this ridge is expected to lift northward making breezes light and variable before turning to be out of the southeast. This southeasterly pattern will remain as the ridge sits across mainland south Florida throughout this week. The next day or so will be generally drier with the ridge dominating the sensible weather pattern. Around the middle of this week, an upper level trough will sink south from the southeast US. It is worth noting that guidance seems to be keeping this trough somewhat more north than runs on previous days that could hinder increasing rain chances if the trend continues. From synopsis, as ridging shifts north, breezes will become light and variable tonight before settling out of the east to southeast.
1150 AM EDT Mon Jun 19 2023 Low pressure will exit across the Maritimes today. High pressure will build toward the region Tuesday and crest overhead into late week. Surface/upper level low pressure will exit across the Maritimes today, while upper level troffing in the wake of the system remains across the region. High temperatures will range from around 60 to the lower 60s north, to the lower to mid 60s Downeast. Temperatures will slip back into the low to mid 40s across the north with upper 40s to low 50s across southern zones. Otherwise, Tuesday will turn out partly cloudy and a bit warmer than recent days.
1154 AM PDT Mon Jun 19 2023 Well below normal temperatures are expected across the forecast area for the next few days due to low pressure aloft bringing in marine cooled air to the region.
/16 (Now through Tuesday) Looking at the big picture, an upper low organizes over Kentucky today, then pushes south. Along and south of the coast is another story, with the cold front stalling along or just south of the coast. Tonight as the cooler and drier air moves south across the area, upper 60s along and north of highway 84 are expected.
248 PM MDT Mon Jun 19 2023 Northeast Colorado will remain between troughing over the Pacific Northwest and ridging over Mexico and the southern US, with increasing southwesterly flow aloft. Tonight, mostly clear and dry with near normal overnight low temperatures, in the 50s across the plains and mostly 30s and 40s across the high country. Tomorrow, mostly clear to partly cloudy and dry with near normal high temperatures, in the 80s across the plains and mostly 50s and 70s across the high country.
The morning sounding had the freezing level at 5100 feet which will put the snow level between 4100 and 4500 feet. Overnight lows in even the colder spots were in the upper 20s with most other locations in the low to mid 30s. Tonight, the upper trough will remain overhead with the trough axis moving over our area late tonight.
High cirrus continues to stream in aloft, downwind of a deep-layer stalled low pressure system over Kentucky/Tennessee. This maintains a veil of VFR cloud aloft through the evening and most of tonight before the low drifts southeast and skies clear out Tuesday morning. Over the next couple of days a mid level ridge axis will amplify/expand across the Upper Midwest and northern Great Lakes region in response to long wave troughing diving across the western US. A blocked pattern will emerge which will cause the upper low now centered over the Lower Ohio Valley to slowly sink southward across the Lower Tennessee Valley into the deep south by mid week. While high clouds will be rather extensive across Se Mi today, they will dissipate on Tuesday as the building mid level ridge exerts more influence across the region.
With this in mind, surface front pushing through Cumberland Plateau Region as these mid morning hours have progressed, and upper level low across south central KY becoming major weather player in our forecast as rest of day progresses as it slowly shift eastward, believe current suite of forecast products and previous forecast reasoning continue to be in line and thus not many changes made to current forecast package other than gridded hourly refresh mentioned above. In the upper levels, a cutoff low resulting from an incoming trough out of the west will stick around the southeast through the first half of the week. Models are in better agreement with this low stalling out across the eastern half of Tennessee and northern Georgia.
This dry air is already spreading west through all of the CWA, as the lower 60s dewpoints are now confined to the western-most counties, and lower 50s dewpoints are spreading into the eastern counties. The combination of warm afternoon temperatures in the 80s, to near 90 are combining with the lowing dewpoints to drop relative humidity to the 25 to 35 percent range.
A broad upper level trough over the West will keep cool and breezy conditions over the region through mid-week. (This afternoon through Tuesday) Low pressure aloft will extend from the Canadian Prairies through the Pacific Northwest and NorCal. In addition to the winds temperatures will remain on the cool side for today, with highs only reaching the upper 50s and 60s (coast and bays) to lower 70s (warmer inland spots). Less windy for Tuesday with high temperatures a bit warmer (low-mid 70s) for inland areas.
Otherwise, a strong upper level ridge will result in very hot temperatures and humid conditions through Tuesday and an Excessive Heat Warning is in effect for all of west central Texas through Tuesday as NBM highs are in the 105 to 110 range.
1024 AM CDT Mon Jun 19 2023 (Issued 1024 AM CDT Mon Jun 19 2023) High pressure to the east northeast of the area will continue to bring dry conditions today into Tuesday. Highs in the middle 80s well inland are expected each day, with cooler 70s near the lake.
The morning sounding had the freezing level at 5100 feet which will put the snow level between 4100 and 4500 feet. Overnight lows in even the colder spots were in the upper 20s with most other locations in the low to mid 30s. Tonight, the upper trough will remain overhead with the trough axis moving over our area late tonight. Showers could result in brief periods of MVFR ceilings with the higher terrain partly obscured, otherwise VFR ceilings are expected through the TAF period.
1216 PM CDT Mon Jun 19 2023 (Today through Tuesday afternoon) Upper ridge centered over Nrn Mexico extends north across TX and NM producing unseasonably hot wx for the region. An upper trough along the West Coast tries to lift NE but will have little effect on the area as the ridge remains entrenched and if anything actually strengthens over the region Tuesday.
235 PM CDT Mon Jun 19 2023 Looking at the CONUS as a whole, there's a fairly stout mid/upper ridge building in across the southern and central plains with upper troughing across the western CONUS and a cutoff upper low over the Ohio Valley. The primary feature influencing our weather will be the upper ridge as it temporarily dampens rain chances while promoting warmer temperatures across the forecast area.
A windy start to the work week is in store as an anomalous trough remains positioned to our northwest. Latest model guidance has 500mb height anomalies with this trough at -3 sigma, showcasing the unusualness of the pattern for mid-June. Large-scale ascent downstream of the trough axis will induce pressure falls across central Nevada and Utah, driving gusty southwest winds across the region today. Forecast highs in Las Vegas are in the low 90s, with the entire CWA 6-10 degrees below normal. Skies should be mostly clear, with just some passing high clouds and a few lenticular clouds tied to the high terrain.
Mid-level ridging continues to strengthen and become better centered over our area. Much of the lower elevations can expect temperatures to top out between 105 to 110 degrees later this afternoon. Even portions of the higher terrain will be near or above 100 later this afternoon.
Tonight: An area of high pressure will continue to build across the Great Lakes region allowing for fairly quiet conditions to return tonight, with low temperatures in the 50s to low 60s, clearing skies, and light SE winds. This pattern will feature deep troughing over the northwestern U. and an upper level low over the southeastern U. , with upper level ridge building in between from the southern Plains into the Great Lakes region. This looks to once again bring in warmer and drier conditions to the local region. Overall, current guidance shows the ridge breaking down over the Great Lakes, with flow over the region becoming more zonal.
Southerly winds increase tomorrow with warmer temperatures permeating throughout the Northland.
The current cold trough extending from the Pacific Northwest to the Northern Rockies is bringing cold temperatures in the 30s above 6000 feet, and snow has been reported at Lost Trail Pass, situated at 7000 feet. As the cold core of the trough moves eastward towards the region, thicknesses will decrease tonight, resulting in even colder conditions expected tonight and Tuesday morning. If you are planning outdoor activities in the high terrain or visiting Glacier National Park, please ensure you are appropriately dressed, as the main weather-related concerns arise from individuals who are unprepared for the prevailing conditions. Ensemble model guidance is in agreement that another trough will approach the region from the southwest towards the end of the week.
(This evening through Tuesday) A low pressure system currently over the Ohio Valley will slowly drift to the south through the short term. Flow around this low will be westerly to northwesterly over the state. High temperatures will be in the mid to upper 80s, but thanks to the high moisture content across the state, heat indices will be in the low 90s. By sunrise, isolated to scattered showers could begin developing, mainly in the northeast, closer to this low pressure system. With all this said, scattered activity could spread from the northeastern corner of the area, to basically the eastern half of the state where the greater low level convergence will be from the low pressure system.
It's beginning to sound like a broken record, but the high pressure remains in place to our south and a stubborn trough continues to sit across the Southeastern U. Additionally, afternoon highs will be near normal (reaching into the lower 90s each day). However, the overnight lows will remain muggy throughout the upcoming week, only falling into the lower 70s across the northern and interior counties and into the upper 70s to lower 80s for coastal regions. High pressure remains to the south with repeated stalled outflow/frontal boundary to the north leading to an unsettled weather pattern during the upcoming week. With high pressure to the south and slow-moving frontal boundaries to the north, the Florida Peninsula remains in southwest flow.
Wind should begin to die off some late this evening and overnight as the surface decouples from the boundary layer, however gusty winds will likely still remain above the inversion and downwind of the high terrain.
Temperatures have dropped from the 90s into the lower to mid 70s over southeast Georgia and near 80 degrees in northeast Florida.
(Tonight) Both a cutoff upper low and area of low pressure at the sfc remain in place over the OH Valley this Mon afternoon. Current temps have managed to climb into the lower 80s for many spots, and these temps may climb a couple of more degrees before sensible heating wanes.
(Tonight through Tuesday night) Expect the convection north of the CWA to remain there given the proximity of the upper ridge and recent CIN values on the order of 100 J/lg per the LAPS. The CWA will remain under the influence of the upper ridge during the period. Nevertheless, will continue the Excessive Heat Warning for the Rio Grande Plains Tuesday since the greater diurnal heating may overcome the lower dew points resulting in continued maximum Heat Index values around 115.
Uneventful weather is expected to continue across northern Michigan over the next several days as high pressure at the surface and aloft remains in control. Pattern Forecast: Upper-level ridging continues to prevail through the forecast period across the Great Lakes region.
This will continue to be the case for roughly 24 hours before an upper level Rex Block increasingly takes shape and organizes the lowered height anomaly immediately south of the state over the Ohio River Valley. A nice summer evening with temperatures dropping quickly into the lower 70s upper 60s post sunset. Upper level forecast charts showing just a sliver of an upper level speed max/jetlet but is expected to result in enough geopotential height falls to carve out a weakness in the ridging aloft.