Aikyam-Lab/Synoptic-Bench huggingface dataset:
1127 AM MDT Wed Aug 30 2017 Strong high pressure will remain centered over the Great Basin today and continue to be the dominant weather feature over the western U. Small amounts of moisture will rotate around the high and flow over the area from north to south. Tonight and Thursday two weak troughs will travel through the northern Rockies and flatten the ridge. As the two troughs exit the northern rockies mid-range models show them consolidating and initiating frontogenesis which will drop down the front range of the mountains. This will also bring a few to 5 degrees of cooler Thursday. Thursday night the weak front mentioned above will focus showers over the San Juan mountains and the lower elevations of the four corners.
The 2 pm surface analysis showed a weakening warm front near the FL- AL and FL-GA borders, with scattered thunderstorms developing across our forecast area.
A line of thunderstorms is ongoing along the leading edge of a cold front over central Wisconsin this afternoon.
Overall trend should be a gradual eroding of the wedge as a warm front lifts northward.
1131 AM PDT Wed Aug 30 2017 The arrival of a cold front today will produce locally breezy conditions in central Washington this afternoon and this evening.
315 PM CDT Wed Aug 30 2017 As of 19z Wednesday afternoon, upper level ridge axis is centered over the four corners region. At the surface, the ridge axis is positioned from central Kansas into Wisconsin. Upper level ridge axis will slowly progress eastward into the northern Plains tomorrow afternoon, ahead of the next northern stream trough. Low level ridging becomes centered over the area with perhaps some cirrus late in the night and SREF probabilities are higher than tonight.
210 PM EDT Wed Aug 30 2017 Weak high pressure today.
245 PM EDT Wed Aug 30 2017 Weak high pressure over the region will shift off the coast tonight and Thursday.
Passage of the cold front will become the primary aviation concern tonight through Thursday morning. Dense fog gradually dissipating/mixing out during the morning hours, and with enough sunshine anticipated this afternoon, still expecting maxes near 80 degrees ahead of a cold front which will be dropping south through northern Lower Michigan. Seasonably strong high pressure (1026-1028 MB) becoming firmly established over the northern great Lakes Thursday night, and temps should be able to drop into the 40s even with winds failing to fully decouple.
1249 PM CDT Wed Aug 30 2017 Early morning satellite imagery together with GFS 500 mb heights and winds showed an upper level wave across central Canada, with clouds and precip along a cold front which extended into northern Minnesota.
303 PM CDT Wed Aug 30 2017 Ridging aloft begins breaking down tonight, leading to weak upper level troughing and an associated surface front moving across the Northern Plains through Thursday.
232 PM MDT Wed Aug 30 2017 Latest satellite imagery and upper air analysis show the ridge of high pressure centered over the Four Corners Region. Rotating south around the ridge was a short wave trough over Northwestern Nebraska. This short wave trough has lead to some rain activity. For the rest of the afternoon and into the evening this short wave trough will continue to move south toward the Tri-State Area, but will fill before moving into the forecast area. During the day another upper level short wave trough will flatten the ridge to the west some as the trough moves southeast. Isolated storms may accompany this trough as it nears the forecast area by early evening.
335 PM EDT Wed Aug 30 2017 Weak high pressure will extend across the area into tonight. A cold front will drop south across the region on Thursday and then stall just south of the Ohio River.
Similar conditions are anticipated through the remainder of the week and into the holiday weekend as high pressure remains centered over the region. We are still watching the potential for Tropical Cyclone development to affect the Baja peninsula over the weekend which could initiate a moisture surge into Arizona. At this point, moisture looks to increase across southwestern Arizona and perhaps as far north as Yavapai County, but any changes will depend on the potential cyclone track.
1220 PM CDT Wed Aug 30 2017 For today and tonight, slightly warmer conditions are expected than yesterday, but we will still remain below normal for this time of year. Highs are expected in the low 80s with lows back into the low to mid 60s.
157 PM EDT Wed Aug 30 2017 A weak cold front will move across the area early Thursday, but little if any rain is expected.
317 PM EDT Wed Aug 30 2017 A ridge of high pressure will slide east across Pennsylvania today. A strong cold front will push south through the region Thursday.
1102 AM MDT Wed Aug 30 2017 Upper ridging continues across the western to central CONUS with northwest flow across the northern Plains into the upper Midwest. Weak waves will continue to ride the top of the ridge today bringing some chances for afternoon and evening showers and storms mainly to the western half of the CWA. Upper ridge axis will cross the area Thursday with a strong wave crossing WY toward the CWA. Upper ridging will again set up across the western CONUS through the Labor Day weekend bringing dry weather to the region.
Weak surface ridging bridging into the area will keep surface winds light and generally from a north to east fetch.
Temps in the low to mid 70s across the area at noon which is right on track. Light northeast winds as SFC flow out of high pressure across Ontario persists throughout the day. Upper level trough over Ontario will move east and amplify. Upper level ridge over the northern Rockies will move over the area Thu. Upper level trough over the northeast Pacific will move across MAN/Northern Plains on Fri.
305 PM EDT Wed Aug 30 2017 The subtropical ridge centered north of the Antilles stretches west across the Bahamas and the Florida Peninsula. Temperatures reached the lower 90s in most locations and skies are sunny. Forecast soundings indicate wind speeds increase to around 10 to 15 knots in the lower troposphere as this feature passes, so it seems appropriate to retain 40 percent rain chances tonight and Thursday.
336 PM EDT Wed Aug 30 2017 A cold front will approach from the northwest tonight and will drop south through the region on Thursday.
This morning, with high pressure just off to the east, and light winds some patchy fog is again possible early this morning across the eastern portions of the area. The upper level pattern remains unchanged with a large ridge over the west and a trough over the east. Have already been watching this feature as its energy is strong enough to break down the ridge over the west on its way eastward.
A reprieve from excessive heat will occur today and Thursday as a weak upper level disturbance brings more clouds and a scattering of showers and thunderstorms to mostly the higher terrain.
630 PM EDT Wed Aug 30 2017 A cold front will approach from the northwest tonight and will drop south through the region on Thursday.
142 PM MDT Wed Aug 30 2017 The upper ridge covers the western half of the country, and an upper trough is pushing into the Pacific Northwest.
Early afternoon satellite imagery was showing a broad area of cloud cover lifting NE across the area with some embedded light showers trailing across the SE highlands and cooler surface temps. The clouds and cooler temps appear to be suppressing convective development even though an embedded vort feature was noted lifting NE through the Malta area. An approaching upstream trough off the NW coast should also provide increasing dynamical support for convection in the CNTRL mountains late this afternoon and through the night. Drier and locally breezy conditions should spread from west to east across the region Thursday with the passing upper trough. The best chance for convection is expected over the ERN highlands although there is some differences showing up in the timing of the upper trough passage on the models and thus we could see convection further west as a result.
An upper ridge over Florida extending northward into the forecast area overnight. Tropical Storm Harvey will slowly lift northeastward from southern Louisiana into the lower Mississippi Valley. Temperatures will be cooler in the CSRA due clouds and showers. Should see afternoon highs in the mid 70s across the CSRA with highs in the low/mid 80s farther north and east. A warm front over southern Georgia will move into the central Midlands by midday Thursday and provide a focus for showers and thunderstorms. moderate instability and warm advection/isentropic lift/mid level short wave moving over ridge should result in scattered to numerous showers and thunderstorms near the front through the afternoon.
255 PM CDT Wed Aug 30 2017 The remnants of Harvey continue to track towards the mid state, and models have not only sped up the low, but tracked it just a little further east. Forecasted amounts were adjusted up slightly since the higher precip edged its way more into our area, so expecting the highest amounts to be around 7 inches north of I-40 and west of I-65. As the upper low gets closer to the region, chances for showers and storms will again increase Thursday afternoon in the west.
THURSDAY: No significant changes in the weather pattern into tomorrow as the western Atlantic ridge remains in control of the local weather.
Deep ridge extending across the area into tomorrow, will keep rain chances lower than normal. With plenty of daytime heating and low rain chances tomorrow, it will be another hot afternoon with highs in the low 90s along the coast and mid 90s interior.
542 PM EDT Wed Aug 30 2017 A ridge of high pressure will slide east across Pennsylvania today. A strong cold front will push south through the region Thursday.
This will be short lived as a strong cold front over the U. After, large area of high pressure in Canada will move southward behind the front bringing unseasonably cooler and drier air through the end of the week.
342 PM CDT Wed Aug 30 2017 High pressure will shift from Ontario into the Lake Superior region tonight into Thursday. Overnight lows will likely be in the lower to upper 40s for most areas.
High pressure surface and aloft along with drier air will keep convective development and coverage limited across the forecast area the remainder of the afternoon with only a few isolated showers or storms possible along the sea breeze over far interior locations. On Thursday high pressure surface and aloft will remain in control. Temperatures on Thursday will remain above normal with highs in the lower 90s along the coast, and mid to upper 90s inland with heat indices in the 100 to 105 degree range.
239 PM EDT Wed Aug 30 2017 A ridge of high pressure will slide east across Pennsylvania today. A strong cold front will push south through the region Thursday.
318 PM CDT Wed Aug 30 2017 Weak high pressure over the Missouri River Basin this afternoon extends its reach into Central Illinois as Tropical Storm Harvey makes its way across the Gulf Coast. This afternoon, fair weather cumulus clouds dot the sky with moderate temperatures and light winds under the ridge. with light and somewhat variable winds under the ridge.
North to northeast winds 15knots and gusty to become northwest as the cyclone moves across Louisiana later tonight.
The cold front will cross Thursday morning, but winds will gust into the 20s and 30s again through the day, especially near ridgetops (thus impacting wildfire behavior once again).
1158 AM MDT Wed Aug 30 2017 Upper level ridge will be located near the Four Corners region today with northwesterly flow aloft across the CWA.
1237 PM CDT Wed Aug 30 2017 Quiet weather will continue across the area as high pressure over the Midwest prevails through the end of the week. Surface analysis shows the center of the high over IA and fog is developing or has developed under the high. The high pressure over IA will move east through the day and into the overnight hours. But it will still greatly influence the nocturnal weather into the lower Missouri valley.
212 PM EDT Wed Aug 30 2017 Weak high pressure will extend across the area into tonight. A cold front will drop south across the region on Thursday and then stall just south of the Ohio River.
217 PM MDT Wed Aug 30 2017 A trough is moving onshore the Pacific NW today originating from a closed low over Alaska. This weak upper level trough will rotate around the high pressure in place and shift the high pressure southward over the next couple of days. As this occurs, energy fron the trough will rotate through the northern part of UT and CO, bringing clouds and some showers and thunderstorms.
High pressure aloft will shift further south into the southern Rockies on Thursday.
Another pleasant late summer day compliments of 1028 mb high pressure over eastern lower MI and ridging back into IL today. Moisture channel imagery shows major upper trof over eastern Canada that will serve to block the eastward progression of the Dakota wave. Upper low really digs/closes Sun ngt and Mon, pushing into northern IL.
An upper level ridge will build north into the Pacific Northwest from the Great Basin today and tonight. As such will see warmer air shift into the region.
High pressure and dry air remain in place leading to lower humidity and a pleasant afternoon for most areas once again. Only expect a slight chance of a few diurnal rain showers across the highest peaks of the TN/NC mountains this afternoon. Chattanooga Airport, TN 87 67 86 67 / 0 0 20 10 Knoxville McGhee Tyson Airport, TN 83 64 84 64 / 0 10 10 10 Oak Ridge, TN 84 64 85 64 / 0 0 10 10 Tri Cities Airport, TN 83 60 81 59 / 10 10 10 0.
511 AM MDT Sat Aug 26 2017 Area will be under northwest flow aloft today with subtle height rises as western ridge nudges across the Rockies. At the surface, lee trough will sharpen up in northeast Colorado, which is where convective allowing models initiate thunderstorms by 21z. Sunday will see the ridge continue to build aloft. At the surface, a cold front will sag into the are during the afternoon.
The broad upper trough will remain over much of the eastern CONUS tonight, while an upper low develops over the western Great Lakes region. Temperatures may be a degree or two cooler on Sunday, than those observed today, given the increased cloud cover.
1057 AM EDT Sat Aug 26 2017 High pressure will allow for continued dry conditions through the weekend.
1050 AM EDT Sat Aug 26 2017 The area of low pressure remains in place across the Tampa Bay area with numerous showers and a few embedded thunderstorms across the southern half of the area. This low is expected to lift to the NE across the state and into the Atlantic over the next day or so, before finally lifting out of the region and allowing high pressure to build in. An area of low pressure remains in place across the Tampa Bay area this morning.
Look for highs today mainly in the lower and mid 80s, with some upper 80s in parts of southeast NE. As low pressure tracks east across MN and WI through Sunday, a cold front will sag southeast through the region. Will have to keep at least some 20-40 percent thunderstorm chances in the area, but severe potential looks on the low side. The pattern should turn mainly dry by Sunday night, and continue through mid week as high pressure at the surface builds in and takes control. The 500 mb pattern at the start of this period suggest that the remnants of Harvey will linger near the TX coast, a ridge will be centered over UT and we will be in modest northwest flow. Fog potential tonight behind the cold front after 06z.
Temperatures will increasingly warm today and Sunday as high pressure builds in over the region. The forecast remains on track with an upper level ridge of high pressure that is currently centered over the state of Utah, expected to expand westward across California resulting in a significant warm up especially over inland areas.
759 AM EDT Sat Aug 26 2017 High pressure under northwest flow aloft will maintain cool temperatures for the weekend.
1235 PM EDT Sat Aug 26 2017 The forecast area will be between a frontal boundary off the Southeast Coast and high pressure ridging southward along the Appalachians over the weekend. An area of low pressure will develop along the front and lift northeastward.
530 AM MDT Sat Aug 26 2017 Broad upper ridging is strengthening across the SW quadrant of the CONUS with northwest flow aloft across the northern Great Plains. Surface analysis shows weak low pressure over central WY which will be the focus for storms development today. Surface obs also showing fog across the Pine Ridge reservation through central SD. also drawing in cooler air from MT. Good theta e advection ahead of the low over the SD plains along with a weak upper wave crossing the area will trigger storm development mostly across western SD.
High pressure remains in control through the remainder of the weekend, keeping us dry with temps running below normal for this time of year.
920 AM EDT Sat Aug 26 2017 High pressure from central Canada will build over the area this weekend and remain across the region through early this coming week. A large and slow moving high pressure system will continue to build in from central Canada today bringing dry weather across the area. Some moisture and cool air will still be pooled aloft in an upper level trough slowly exiting the northern part of the region. The upper trof is forecast to hang across the CWA on Sunday w/a disturbance dropping sse during the day. Clouds will dissipate Sunday w/the trof pushing e.
/BB/ Prior discussion below: Today and Tonight: Looking at the synoptic setup across the country early this morning, Hurricane Harvey continues to slowly edge inland across coastal Texas, with a strong ridge of high pressure across the Great Basin and a weaker ridge over the northeastern Gulf of Mexico.
Upper level ridge will expand across the Western US today. Mid-level monsoon moisture will rotate through the ridge on Sunday with increasing clouds during the afternoon especially along the NV/OR/ID border.
1121 AM EDT Sat Aug 26 2017 High pressure under northwest flow aloft will maintain cool temperatures for the weekend.
High pressure building back into the area will produce warmer and drier conditons across the region through the weekend. Sunday will be warmer with highs mainly in the 80s and low 90s.
Highs in the lower to middle 70s may be a bit too high, if the clouds and rain showers linger through the afternoon.
No impacts here from Harvey in the short term though as ridging aloft keeps moisture east of the area.
High pressure building back into the area will produce warmer and drier conditons across the region through the weekend. Sunday will be warmer with highs mainly in the 80s and low 90s. Anglin A large ridge of high pressure will bring dry air and warming temperatures this weekend.
There is a risk of strong storms near surface trof axis later this afternoon, but with pressure rises building from the northwest, believe this will be east of our cwa. Boundary layer winds will be maximized in a NW-SE axis between Billings and Miles City, specifically over the higher terrain around Lame Deer/ Ashland, an area with a few recent fire starts. A weak disturbance dropping into southeast Montana today combined with low level convergence along an inverted trof over that area will provide the focus for isolated to scattered showers and thunderstorms, mainly east of a Miles City to Broadus line today. Amplified ridging dominates the forecast starting Sunday with dry and unseasonably warm conditions to end the weekend.
920 AM EDT Sat Aug 26 2017 Large area of high pressure over the Central Great Lakes will slide east and move into New England Sunday.
100 PM EDT Sat Aug 26 2017 Large area of high pressure over the Central Great Lakes will slide east and move into New England Sunday.
603 AM CDT Sat Aug 26 2017 Upper level ridge of high pressure is currently building over the western CONUS early this morning. Highs should again top out in the lower to upper 80s this afternoon. Lows tonight will fall into the lower to middle 60s. The upper level ridge of high pressure will remain over the western U.
719 AM EDT Sat Aug 26 2017 Aviation A weak area of low pressure will gradually track into the Great Lakes region over the next few days.
Weak upper ridging was trying to build northward across the southeastern CONUS this morning, but is not expected to make much progress into the TN Valley. This is due to a broad upper level trough, expanding across much of the eastern CONUS, that will dig southward today. As of 4 am, a mild night continues, as high clouds help keep temperatures in the low to mid 60s. The broad upper trough will remain over much of the eastern CONUS tonight, while an upper low develops over the western Great Lakes region. Temperatures may be a degree or two cooler on Sunday, than those observed today, given the increased cloud cover.
1036 AM EDT Sat Aug 26 2017 Canadian high pressure will remain in charge through the weekend providing dry weather with below normal temperatures.
A weak low pressure system will lift northeast across Minnesota into central Wisconsin this weekend resulting in rain showers and a few thunderstorms across the Northland through the weekend. Temperatures cooler than normal with highs in the 50s to 60s today, upper 50s to near 70 on Sunday.
The local Doppler radar indicated an area of mostly stratiform rain affecting the gulf waters north of the Lower Keys, with the heaviest precipitation over southwest Florida, leaving the island chain free of rain. An area of low pressure in the lower levels this morning was located over central Florida and its expected to linger this afternoon and tonight.
1050 AM MDT Sat Aug 26 2017 Area will be under northwest flow aloft today with subtle height rises as western ridge nudges across the Rockies. At the surface, lee trough will sharpen up in northeast Colorado, which is where convective allowing models initiate thunderstorms by 21z. Sunday will see the ridge continue to build aloft. At the surface, a cold front will sag into the are during the afternoon.
1240 PM EDT Sat Aug 26 2017 High pressure from central Canada will build over the area this weekend and remain across the region through early this coming week. A large and slow moving high pressure system will continue to build in from central Canada today bringing dry weather across the area. Some moisture and cool air will still be pooled aloft in an upper level trough slowly exiting the northern part of the region. The upper trof is forecast to hang across the CWA on Sunday w/a disturbance dropping sse during the day. Clouds will dissipate Sunday w/the trof pushing e.
There was a mid/upper level anticyclone centered in the central Gulf of Mexico and a couple divergent areas on the eastern flank existed. This should occur earliest in the south, then later in the north as the low clouds slowly break up.
Think the low clouds and fog should stay away tomorrow morning. Models have held on to idea of a weak cold front arriving Sunday afternoon and Sunday night.
/NF/ Today and Tonight: Looking at the synoptic setup across the country early this morning, Hurricane Harvey continues to slowly edge inland across coastal Texas, with a strong ridge of high pressure across the Great Basin and a weaker ridge over the northeastern Gulf of Mexico.
This has helped keep temps several degrees cooler than at the same time yesterday. A sprawling high pressure system over the eastern United States is expected to keep VFR conditions in place across the Mi-State through the forecast period.
Early this Saturday morning, sprawling high pressure was centered over the Hudson Bay to the Great Lakes, and extended down into the Volunteer State with nice wx. For today, the high pressure system with northwest flow aloft will keep our wx dry and slightly cooler than normal. Highs will reach the low to mid 80s. On Sunday, the high pressure will begin to pull east, allowing slightly warmer and more humid air to develop.