Aikyam-Lab/Synoptic-Bench huggingface dataset:
324 AM CDT Tue Jun 27 2017 Main vorticity axis stretching from the closed upper low in the eastern Great Lakes is in the process of working south of I-70 around 08z. Ridging develops in the wake of the passing upper level trough today and will persist through Wednesday afternoon. Zonal flow developing behind the ridge will place the WFO PAH forecast area just south of the faster flow to the north.
201 AM EDT Tue Jun 27 2017 A weak cold front will cross the today. High pressure will build over the area Wednesday.
555 AM EDT Tue Jun 27 2017 A strong cold front will push across the area today reinforcing the unseasonably cool air across the forecast area.
219 AM PDT Tue Jun 27 2017 Weak low pressure over the Pacific Northwest will bring dry conditions with moderate afternoon breezes today and Wednesday. A period of tranquil weather is expected for the next several days as a trough moving from the Pacific Northwest to the northern Plains keeps dry and stable west to northwest flow aloft over the Sierra and western NV. This pattern will bring a long-awaited easing of the recent period of very warm temperatures, especially with overnight lows also cooling to near seasonal averages in the 40s and 50s, and mid-upper 30s in typically cooler Sierra valleys.
High pressure will provide quiet weather across the area today. The high will slide off to the east tonight.
126 AM EDT Tue Jun 27 2017 A cold front will linger off the coast through Tuesday. A disturbance aloft will pass through Tuesday evening, followed by high pressure Wednesday.
/issued 340 PM CDT Mon Jun 26 2017/ Water vapor imagery continues to show a broad trough of low pressure over the eastern half of the US this afternoon, with a series of disturbances moving through this flow. The overall flow aloft will not change much over the next 24 hours, as this trough will remain over the region. Day time temperatures will be similar to or slightly warmer as well. The upper level flow will become more zonal on Wednesday, with a weak upper level low forming over the gulf coast.
125 AM EDT Tue Jun 27 2017 An upper disturbance will bring a few showers Tuesday followed by a reinforcement of cooler and drier air through mid week.
345 AM CDT Tue Jun 27 2017 (Today and Tonight) An upper level high over northwestern Mexico and the Desert Southwest will weaken to some extent but move little today and tonight. Temperatures will be a little warmer today, especially across our northern and central counties where greater insolation is expected. Overnight lows are expected to be in the upper 60s across most of our southern and central counties, to the lower 70s for much of the Big Country.
As of 20Z, the region is situated under northwest flow aloft with a high pressure at the surface. This high pressure will drift southeast of the region tonight allowing for southerly winds to develop. This CWA will continue seeing windy conditions on Tuesday as a low pressure system develops west of the region. Mid-level waa will have warmed temps up enough to cap off daytime convection, but as a cold front begins to push into the region from the west early Tuesday evening, expecting at least isolated to scattered coverage of thunderstorms (supercells most likely) to develop with large hail and damaging winds possible.
/Issued 316 PM EDT Mon Jun 26 2017/ Much drier and cooler air mass remains has settled over the area as high pressure dominates. Expect building cirrus overnight tonight into Tuesday as a series of upper level impulses traverse an approaching upper level trough. Even with the trough, little convective development is expected due to the abnormally dry high pressure at the surface. The ridge gradually moves east.
531 AM EDT Tue Jun 27 2017 Upper low pressure will maintain cool temperatures and the risk for showers or a storm today.
As the high pressure system continues to sag southward, increased westerly dry flow will allow for substantially drier air to become entrenched over much of the Desert Southwest through the rest of the week.
A surface and upper level trough will move through the area this afternoon and this evening, perhaps bringing a spotty shower or thunderstorm to portions of the area. Water vapor imagery clearly shows a compact upper level low over Lake Michigan this afternoon.
Sunny skies with dry weather will be the norm for the week along with cooler temperatures. Warmer temperatures will begin to creep back into Nevada by the weekend. With the departure of the short wave trough dry and cooler air is currently moving across Nevada. Big change in the outlook with the models starting off in decent agreement for a flattening ridge over the western CONUS. The ridge moves into the interior and then quickly is replaced by a series of short waves or small closed lows, depending on the model and time frame.
Scattered clouds are expected today with high pressure keeping winds light under 10kts. Mid and high level clouds will increase tonight as the high slips off to the east.
High pressure will build in from the west Wednesday through late week and offshore for the weekend. Mid and high clouds continue to stream across eastern NC as cooler/drier airmass has settled over the region with most locations in the low/mid 60s early this morning. High temperatures should be in the low to mid 80s. Any leftover precipitation should impact the east and northeast portions of the CWA through about midnight or so followed by rapid drying as strong high pressure builds east from the western Virginias. High pressure will settle overhead Wednesday and provide fair and seasonably cool conditions.
Temperatures will continue to run well below normal today, with highs in the low to mid 70s anticipated. We should see a return to closer to normal temperatures on Wednesday, as a ridge of high pressure settles over the area. Highs on Wednesday should be able to climb into the lower 80s for most locations. With clear and calm conditions expected tonight, we may see some valleys fall into the upper 40s, while the surrounding ridges drop into the lower 50s. With mainly clear skies, this will promote ridge/valley low temperature differences for at least the first couple of nights.
115 AM EDT Tue Jun 27 2017 The cool air will continue through tomorrow as an upper low moves slowly through the Great Lakes. Drier and warmer weather will return on Wednesday. Trough axis will remain west of the area through Tuesday so increasingly cooler air will advecting in aloft. The upper-lvl trough will be push off to the east and anti-cyclonic flow will shift over the region.
Some of the high resolution data suggests it won't make it too far past a Palisades to INL line, BUT there are a few indications it could make it almost to Craters and Pocatello. It will be noticeably cooler, around 7-15 degrees. It will be a bit cooler than today and breezy.
306 AM CDT Tue Jun 27 2017 High pressure centered over Iowa will drift southeast into the Ohio Valley today and continue east over the central Appalachian Mountains tonight. Wind will turn to the southeast today and then the south tonight as the high moves east and a surface trof develops over the Great Plains. The aforementioned trof over the Great Plains will gather strength overnight and southerly flow will continue to increase over the region. These high clouds combined with the southerly flow will limit radiation tonight resulting in warmer lows in the 60s across the majority of the area.
419 AM CDT Tue Jun 27 2017 Northwest flow will transition to westerly flow this evening as an upper level trough suppresses the four corners high pressure system.
431 AM EDT Tue Jun 27 2017 Currently - The weak western flank of a surface Atlantic ridge extends across the Bahamas into South Florida. Meanwhile, the mid level ridge axis remains across South Florida and the Keys. Forecast - The weak ridge near Florida will be obliterated today as Florida warms. The ridge axis to our north will begin to be reinforced by another high moving off the Atlantic seaboard on Wednesday. This will help to hold overall ridging across the broader area.
602 AM EDT Tue Jun 27 2017 An upper disturbance will bring a few showers later today, followed by drier and slightly cooler air through mid week.
535 AM CDT Tue Jun 27 2017 Main vorticity axis stretching from the closed upper low in the eastern Great Lakes is in the process of working south of I-70 around 08z. Ridging develops in the wake of the passing upper level trough today and will persist through Wednesday afternoon. Zonal flow developing behind the ridge will place the WFO PAH forecast area just south of the faster flow to the north.
Temperatures will continue to run well below normal today, with highs in the low to mid 70s anticipated. We should see a return to closer to normal temperatures on Wednesday, as a ridge of high pressure settles over the area. Highs on Wednesday should be able to climb into the lower 80s for most locations. With clear and calm conditions expected tonight, we may see some valleys fall into the upper 40s, while the surrounding ridges drop into the lower 50s. The long wave trough over the eastern U. A couple of short wave troughs will move through the mean flow during latter part of the week, with the most significant short wave moving across the Great Lakes this weekend. At the surface, high pressure will be moving off to our east on Wednesday.
345 AM EDT Tue Jun 27 2017 High pressure will build across the area today resulting in fair weather. As the high pressure system moves east Wednesday, southerly winds will develop over our area leading to warmer and more humid conditions.
High pressure offshore will maintain low level onshore flow into the weekend with varying amounts of late night and morning clouds.
Surface ridging across the area will keep winds light and less than 10 kts through the forecast period.
612 AM EDT Tue Jun 27 2017 A trough of low pressure will remain to our west through mid week. Weather disturbances moving out of the trough will cross the area this afternoon and again on Wednesday.
Even so, expect a recovery in the mean southerly low level flow by Wednesday afternoon with much warmer temperatures across the area. The effective surface front/trough is expected to be situated across central Kansas near peak heating with a very unstable airmass and shear profiles supporting a few severe storms. Another area of convection and potential MCS may develop/organize a bit further west across the high Plains Wednesday evening before moving/propagating east-southeastward across central Kansas Wednesday night. This activity could also be severe with warmer temperatures aloft limiting chances across southern Kansas.
Cold front will continue its eastward push Wednesday morning taking the rain chances with it.
With N-NE steering flow, some of the high-res guidance (such as the HRRR) suggests that the activity in that area may loosely organize and propagate southward toward our nrn counties early Tuesday morning.
210 AM EDT Tue Jun 27 2017 A cold front crosses Tuesday morning. High pressure crosses Wednesday. Warmer, more humid and unsettled latter half of the week.
Temperatures are running around 3-8 degrees cooler across much of the region compared to 24 hours ago (except for the Delta and Sacramento/Stockton areas which are about the same) and generally range from the upper 30s and 40s in the mountain valleys to the 50s and 60s elsewhere. Warming returns Wed-Fri as ridging over the eastern Pacific moves onto the West Coast.
359 AM EDT Tue Jun 27 2017 A weak level trough will move track north of the region today.
This signals the switch in the overall pattern from a strong ridge and thermal trough which brought us record or near record temperatures over the weekend to a more typical end of June pattern. Beyond tomorrow, the forecast calls for drier weather and normal temperatures across the board as our next ridge builds into place. Although this could allow for the next thermal trough to build, models are showing relatively stable 850 millibar temperatures and have kept the forecast quite similar to the previous forecast with only slight changes with a slight favoring toward the GFS here and there.
641 AM EDT Tue Jun 27 2017 A weak cold front will cross the today. High pressure will build over the area Wednesday.
Active weather day expected with intensity the biggest question as a disturbance will move through the area with the ridge axis already moving out of Montana. Most of the forecast area has seen a cold front pass through overnight though front likely to be hung up over Carter and Fallon counties into the morning hours. Temperatures will be cooler today by 7-10 degrees with southeast Montana still seeing a few upper 80s. Airmass is slightly drier and the boundary layer is cooler so while instability will support thunderstorm development expect storms to be less numerous and not as wet. Flow becomes even more cyclonic Wednesday night as the wave begins to swing through southern Saskatchewan which pushes a cold front through the area.
127 AM EDT Tue Jun 27 2017 Weak high pressure builds farther offshore tonight as a cold front approaches from the Great Lakes. High pressure will then briefly follow for the middle of the week. Anomalously strong upper trough across the Great Lakes and Ohio Valley states pivots eastward the next couple of days with gradual height falls and increasing daytime instability. Airmass gradually destabilizes on Tuesday with height falls and approaching cold front over the Great Lakes. Cold front works across the area in Tuesday evening with high pressure to follow.
335 AM EDT Tue Jun 27 2017 Low pressure tracking into Georgian Bay will continue to drag an axis of moisture across Southeast Michigan early this morning. Low freezing level (6-7kft) will once again bring the risk for small hail with any thunderstorm that develops. The remainder of the night and most of Wednesday look dry as high pressure centered over the Ohio Valley extends northward into Lower Michigan. Active pattern then setting up from Wednesday night through the end of the week as upper energy now pushing through Oregon tracks through the Upper Midwest and Great Lakes, and is followed by the upper low now over British Columbia and Alberta. Strong low-level jet will usher warmer air and moisture into the area Wednesday night, spiking PW values up close to 1.
455 AM MDT Tue Jun 27 2017 The axis of the upper ridge is over the Rockies, and a trough over the Pacific Northwest is beginning to break down the ridge. Thermal ridge will shift over western SD, and temperatures will rise to the mid 80s to lower 90s. CAMs are showing a line of storms developing across western SD and moving into central SD this evening ahead of the cold front. Temps will be about 10 degrees cooler on Wednesday behind the cold front. Another weak wave associated with the upper trough will produce some showers/storms across northeastern WY and the Black Hills.
windy and warmer. It will be a windy day on the plains, with low pressure near 989mb in western Nebraska inducing strong south winds across Kansas. Instability will increase significantly this afternoon, in response to moisture advection holding dewpoints in the lower 60s.
1233 AM CDT Tue Jun 27 2017 Aloft: The Westerlies were moderately amplified with a ridge over the Wrn USA. a trof over the E and cyclonic NW flow between over the Plns. This low will weaken and cont E as a trof tonight into tomorrow and arrive into MT/WY after midday. This will force the Wrn ridge to deamplify and move over the CWA tomorrow. The tail end of this trof will cross the CWA Tue night.
408 AM EDT Tue Jun 27 2017 Upper low pressure will maintain cool temperatures and the risk for showers or a storm today.
124 AM EDT Tue Jun 27 2017 Upper low pressure will maintain cool temperatures and the risk for showers or a storm today.
204 AM EDT Tue Jun 27 2017 A weak cold front will cross the today. High pressure will build over the area Wednesday.
603 AM EDT Tue Jun 27 2017 High pressure will build across the area today resulting in fair weather. As the high pressure system moves east Wednesday, southerly winds will develop over our area leading to warmer and more humid conditions.
1006 AM EDT Sun Jun 25 2017 A tropical airmass will linger into Monday as a cold front approaches from the northeast.
/Issued 347 AM EDT Sun Jun 25 2017/ A cold front, currently moving through north GA will continue to slowly slip south of the CWA through the morning hours. This front will usher in much drier and cooler air. all thanks to the dry cool high pressure building in from the north.
This cold front will slowly shift southward toward the Altamaha River Basin toward the later afternoon hours, giving plenty of heating time over most of the region today. Latest HRRR indicates numerous showers and storms will develop along the pre-frontal trough this very late morning or early afternoon across SE GA and slowly shift southward toward the GA/FL border region during the mid to late afternoon before shifting into Northeast Florida this evening. Scattered showers and storms again expected to again linger into the later evening or even early morning hours late tonight with the pre-frontal trough being the main focus.
925 AM EDT Sun Jun 25 2017 High pressure nudging east into the OH valley from the mid MS valley will bring sunshine and mild temperatures to the area today.
/NF/ Today through Tonight: Latest satellite imagery showed a broad upper trough axis over the Central CONUS. The drier air will bring in some cooler lows with readings in the lower to middle 60s.
CIRA Simulated WRF satellite showed this nicely, with it keeping the low stratus through about noon before breaking up. May need to adjust the high forecast temperatures for today - depending on how long the clouds hang around. The lower airmass will remain on the moist side while the northwest flow aloft will bring dry air at the mid and upper levels. Temperatures slightly warmer and a slight increase in moisture will improve instability today. Upper level high pressure building over the Rocky Mountain Region will bring mostly dry and warmer weather to north central and northeastern Colorado on Monday.
821 AM CDT Sun Jun 25 2017 Northwest flow aloft prevails over the region today, on the southwestern fringe of a broad upper trough centered over the Great Lakes. Mid-level isentropic lift to our west is bringing clouds and some showers and storms to the high Plains. A lot of the mid cloudiness over our area has dissipated since sunrise, likely due to increasing isentropic descent on the lower Plains. With more insolation expected, highs should climb to the warmer numbers the guidance has suggested.
424 AM PDT Sun Jun 25 2017 Hot weather will continue for inland areas today under high pressure aloft.
1026 AM EDT Sun Jun 25 2017 A longwave trough extends across the eastern 2/3rds of the CONUS with westerly flow aloft across the Southern Appalachians. Chattanooga Airport, TN 83 60 83 59 / 10 0 0 10 Knoxville McGhee Tyson Airport, TN 81 58 80 57 / 10 0 0 10 Oak Ridge, TN 81 57 80 56 / 10 0 0 10 Tri Cities Airport, TN 78 53 77 53 / 0 0 10 10.
Meanwhile, the subtropical ridge remains over the forecast area today which will continue to result in very hot temperatures.
Cold front is currently draped from Panama City northeastward to Albany and a slow progression southward is in order today.
Winds will be light and generally out of the north to northeast as high pressure builds in. Otherwise, high pressure building in from the north will keep temperatures down below normal again today and on Monday as well.
This is based on an amplified ridge over the western states. This ridge is anchored by hot desert air spread over the entire Southwest, and extending north through western Canada into the Arctic Ocean. Off to the east is a broad, long- wave trough with much cooler air. The boundary between these two air masses runs through Montana, with the local region on the cooler side of the boundary.
950 AM EDT Sun Jun 25 2017 Low level ridge axis across the central FL peninsula this morning. Some cooling in the mid levels as well, with 700 mb temps at the Cape 2C cooler at 7. Latest HRRR runs suggest a few cells forming along the east coast seabreeze by midday into early afternoon and could be a few cells along differential heating boundary from persistent cloud deck, but the highest storm coverage not expected to occur until the late afternoon and early evening over the interior as the east and west coast boundaries collide. Areas near and to the NW of I-4 corridor expected to have the highest coverage. PoPs will gradually taper down heading south and east, with position of ridge axis allowing the earliest and farthest westward push of the east coast boundary.
These showers are generally co-located with the axis of an upper level trough. The high temperature and hourly temperature grids for today were also adjusted to reflect these trends.
/CME/ Prior discussion below: Today through Tonight: Latest satellite imagery showed a broad upper trough axis over the Central CONUS. The drier air will bring in some cooler lows with readings in the lower to middle 60s.
1114 AM EDT Sun Jun 25 2017 A cold front stalls over the Carolinas today into Monday. High pressure builds into the area through midweek. Incrementally cooler and becoming a bit drier area-wide by evening. Broad trough aloft from the Midwest through the OH Valley into the eastern CONUS will control the wx today. Upper trough will drop across the Great Lakes through Mon. This feature will push the secondary cold front toward the local area Mon ,prmomg. Even cooler behind the secondary front. Cold front will remain slow to settle SE through SE VA-NE NC today. A cold front stalls just south of the waters late this morning into this afternoon. Another cold front crosses the region Mon night, but again CAA is weak following the front so expect sub-SCA conditions to continue.
A steady east-southeast breezes prevails with slightly higher wind speeds (and wave heights) across the lower Straits of Florida relative the the rest of the service area. A deep, weakly sheared easterly current was present, south of a deep layer mean anticyclone centered over the western North Atlantic.
1034 AM MDT Sun Jun 25 2017 An approaching area of low pressure off the California coast will cause the ridge axis to become more oriented from north to south as opposed to northwest to southeast. By Monday, the low pressure will become a low amplitude trough and will continue shifting the ridge axis east eventually causing our windflow to become more zonal in nature. A bit more convective build up is possible over the higher terrain on Monday but any precipitation looks to be very minimal in nature with the San Juans again favored.
1000 AM EDT Tue Oct 17 2017 High pressure will build in from the west this morning then hold south of New England through Wednesday.
1006 AM EDT Tue Oct 17 2017 High pressure will result in gradually warming weather and dry conditions through the week. No other changes needed this morning as high pressure will maintain nearly clear skies and light wind today. High pressure will remain firmly entrenched over the area through the rest of the week, ensuring a dry forecast.
1018 AM EDT Tue Oct 17 2017 Aviation section updated Quiet weather can be expected through the week and into the weekend across central Indiana with high pressure slowly traversing the area. High pressure building over the area will bring mostly sunny skies and highs in the mid to upper 60s with weak warm advection. While lows tonight will still be in the low 40s under clear skies, some warm advection will cause temperatures to warm to above normal from Wednesday on.
1056 AM EDT Tue Oct 17 2017 Temp/dewpt trends on track with ridge-dominated fall-like regime finally in place.