Aikyam-Lab/Synoptic-Bench huggingface dataset:
(Today through Monday) High pressure aloft and at the surface will continue across the CWA through Monday.
426 AM MDT Sun Sep 3 2023 Water vapor shows upper low over northern CA with ridge axis across the Rockies, and west/southwest flow extending through the Northern Plains. At the surface, trof is shifting into the eastern Dakotas.
308 AM PDT Sun Sep 3 2023 A passing low pressure system will bring additional cooling to central California today, along with a few showers and thunderstorms, and areas of gusty winds. A low pressure system pushing onshore near northern California is providing cooling conditions across our area, with high temperatures yesterday topping out around 8-12 degrees below normal. The low pressure system is also helping to draw moisture across the region resulting in some shower and thunderstorm activity over our area. As the low moves further inland, we will experience additional cooling today, with afternoon highs as much as 15 to 20 degrees below normal. 39% Moisture and instability remain sufficient as the low passes for additional isolated to scattered showers and a few thunderstorms today, mainly north of Kern County.
911 AM EDT Sun Sep 3 2023 High pressure will remain in control of the weather through the Labor Day Weekend, leading to dry but warm conditions. Mid level ridging will shift slowly east across the mid and upper Ohio Valley tonight into Monday.
The low will eventually move further eastwards with high pressure building slightly into the early evening. There are still some upper level waves moving through the flow, although the best chances for showers seems to be along higher terrain based on some of the high resolution guidance. This is due to a cold front pushing down from the north and creating weak lift across the region.
337 AM MDT Sun Sep 3 2023 Overview: A pronounced upper level ridge persists over the central CONUS. downstream of a stalled/cut-off low along the Pacific Coast (centered over northern CA at 08Z this morning). Today-Tonight: The pronounced upper level ridge over the central CONUS will maintain control of, or influence over, sensible weather across the Tri-State area.
409 AM CDT Sun Sep 3 2023 A broad upper ridge across the central CONUS will continue to influence our weather conditions today. General model consensus wants to mix out the llm during the afternoon hours which would keep readings a bit cooler and not allowing heat indices to max out as high as they might. The feeling is we should see some mixing out of the higher dew points during the peak heating time of the afternoon and perhaps the nose of high pressure in our northeast could help in that regard. Parts of our western zones may catch a scattered shower or storm late tonight as the upper ridge breaks down and lead s/w energy rotates up closer into our region from the western CONUS upper trough.
The southwesterly flow aloft will increase this afternoon and evening as a mid level trough over northern CA today, lifts into the Northern Rockies by 12z Monday. This trough will nudge the plume of subtropical moisture over the Great Basin a little further east into CO. A cold front will move across the northern border in the afternoon, accompanied by some low level convergence which should be enough to kick off another round of storms across the northern mountains and northern border areas. Highs will depend on the frontal timing, but we accepted model trends of highs still getting into the lower 90s on the plains, with some cooling in post- front/outflow winds along the Front Range late in the afternoon.
Low pressure moving inland across the West will bring drier, and maintain cooler weather early this week. The drier air will allow for noticeably cooler nights, but daytime temperatures will be below average as well until late in the week, when fair and warmer weather returns.
624 AM CDT Sun Sep 3 2023 (Today and tonight) An upper low will meander over North Texas today. The proximity of this low will bring a possibility for a few showers and thunderstorms late this afternoon and evening to mainly Brown and San Saba Counties. With ample sunshine and the 850mb thermal ridge strengthening a bit today, expect highs this afternoon to be slightly hotter than yesterday. With a southeast to south breeze tonight, low-level moisture will increase, and temperatures will be warmer than the past few nights. Overnight lows will be in the lower to mid 70s.
730 AM EDT Sun Sep 3 2023 An expansive high pressure ridge will maintain control over our weather for much of the upcoming week.
636 AM EDT Sun Sep 3 2023 High pressure will remain in control of the weather through the Labor Day Weekend, leading to dry but warm conditions. Mid level ridging will shift slowly east across the mid and upper Ohio Valley tonight into Monday.
Warmer and drier beginning Labor Day with temperatures returning to near normal around mid-week. Satellite imagery shows the cold closed low beginning to drift inland over NorCal with radar showing an uptick in shower activity over the past couple of hours. Showers and a few thunderstorms are expected to increase across the region early this morning and continue through the afternoon as the low slowly drifts eastward across NorCal.
633 AM CDT Sun Sep 3 2023 (Sunday through Monday) The closed low situated over the region continues to slowly chug west, where it will remain the primary weather creator for the short-term.
515 AM CDT Sun Sep 3 2023 (Today through Monday Night ) A large ridge of high pressure over the middle of the country will shift toward the southeast United States during the near term. A weakness in the ridge in the form of a storm system aloft will be over northeast Texas initially, but will eventually wobble toward the mid-Mississippi Valley. The system will be moved along by a large trough approaching from the Rockies/Plains. The trough and its effects will mostly stay to the north of Arkansas. Before the arrival of the trough, and with the storm system sitting to our southwest, abundant moisture will be in place.
920 AM EDT Sun Sep 3 2023 Underneath strong upper level ridging, hot and mostly dry conditions are expected through mid to late week. Lows in the lower to middle 60s. Little if any changes other than hotter temperatures Monday as high pressure remains strong from the surface aloft. Highs in the lower to mid 90s are expected with lows in the upper 60s to lower 70s.
628 AM CDT Sun Sep 3 2023 (Today) Upper low currently centered over north central TX will remain near stationary through today with isolated showers or storms possibly spreading into far SE OK. Otherwise high temps are forecast a few degrees warmer today.
625 AM CDT Sun Sep 3 2023 Updated aviation section for 12z taf issuance So far this weekend, our region has been warm and dry under the influence of a 500 mb ridge extending from the central Plains to the Tennessee Valley. A cutoff low over northeast Texas has been blocked by this ridge. The mid-level ridge will retreat to the east, allowing the mid-level flow to become southerly by Monday. Though a few spot showers cannot be ruled out this afternoon in se Missouri and far west Kentucky, there will still be enough ridging aloft to suppress convection.
306 PM CDT Sun Sep 3 2023 Current surface analysis places trough through the upper midwest into the central plains, while another low lingers to the lee of the Northern Rockies. Upper level analysis places low amplitude ridge passing over our area and to the east, while low/trough now sliding over the Cascade Mountains/northern Sierra. Southwest flow is starting to nudge towards far western portions of our area with the gradual departure of the aforementioned ridge. For tonight, upper ridge continues its departure with active southwest flow developing over our area. On Monday, shower chances with a few storms linger mainly over northern areas through the morning as a cold front starts its progression into the area.
For Monday, the main upper trof now entering the Great Basin will weaken and lift rapidly across the Northern Rockies with trailing trof moving across Northern Colorado during Monday afternoon. There will also be drier and more subsident airmass moving into the mountains as the trof sweeps across the region.
1254 PM EDT Sun Sep 3 2023 An expansive high pressure ridge will maintain control over our weather through midweek. High pressure making for a sunny albeit warm early September Sunday afternoon. Building heights aloft relatively dry air mixing to the surface beneath a strong subsidence inversion will promote temperatures topping out in the low-mid 90s in the lower Susquehanna Valley with readings generally in the mid 80s elsewhere across central PA. A stout ridge axis, both surface and aloft, will be our controlling feature through at least the middle of the week.
1246 PM CDT Sun Sep 3 2023 (Today and tonight) An upper low will meander over North Texas today. The proximity of this low will bring a possibility for a few showers and thunderstorms late this afternoon and evening to mainly Brown and San Saba Counties. With ample sunshine and the 850mb thermal ridge strengthening a bit today, expect highs this afternoon to be slightly hotter than yesterday. With a southeast to south breeze tonight, low-level moisture will increase, and temperatures will be warmer than the past few nights. Overnight lows will be in the lower to mid 70s.
Showers and thunderstorm chances will continue to increase this week ahead of a trough from the Pacific Northwest. Temperatures will be on the rise this week reaching the low 90s by midweek. A slow moving cold front will bring more showers and cooler air before stalling out ahead of a stronger cold frontal passage late this week.
107 PM EDT Sun Sep 3 2023 High pressure will remain in control of the weather through the Labor Day Weekend, leading to dry but warm conditions. Mid level ridging will shift slowly east across the mid and upper Ohio Valley tonight into Monday.
343 PM EDT Sun Sep 3 2023 High pressure will remain over the area through the first half of this week with dry weather.
Temperatures are already approaching the mid 80s as a result, with southerly surface flow expected to intensify (to 5-10 mph) as the closed low over north Texas continues to drift to our west. /16/ (Sunday through Monday) The closed low situated over the region continues to slowly chug west, where it will remain the primary weather creator for the short-term.
Sheppard (Issued 334 AM CDT Sun Sep 3 2023) Today through Monday: Southwest flow on the northwest edge of high pressure will continue to bring in a hot, dry airmass over the area.
(This afternoon through Monday Night) The upper low continues to spin over the Red River Valley with Middle Tennessee under the influence of light southerly flow today.
201 PM MDT Sun Sep 3 2023 19z surface analysis had trough from central MT into eastern NE. Water vapour matinee had upper low over northern CA, upper ridge over the plains, and lead impulse over UT/CO.
1249 PM CDT Sun Sep 3 2023 Increasing chances for showers and storms through the early part of the week as a weakening upper-low pressure system lifts across the area.
Either side of trough features gusty south-southeast winds and gusty south- southwest winds. For the overnight hours, a strong cold front moves through with 3 hour pressure rises generally 5 to 10mb (GFS model).
(Tonight through Monday night) Key Message: - Heat increases on Labor Day with a medium chance for heat index values above 110 across the southern Coastal Bend The thinking behind the short term forecast remains unchanged with temperatures a few degrees warmer on Labor Day as the 500 hPa cutoff low begins to lift northeast.
1014 AM PDT Sun Sep 3 2023 Cooler and breezy weather arrives today into Monday with an increase of showers with embedded thunderstorms. As an upper low over northern California shifts east, it's replaced by a northwest flow over the region.
1040 AM MDT Sun Sep 3 2023 Overview: A pronounced upper level ridge persists over the central CONUS. downstream of a stalled/cut-off low along the Pacific Coast (centered over northern CA at 08Z this morning). Today-Tonight: The pronounced upper level ridge over the central CONUS will maintain control of, or influence over, sensible weather across the Tri-State area.
231 PM EDT Sun Sep 3 2023 Sfc and upper ridge axis oriented roughly along the I-75 corridor will maintain very warm and dry conditions through the Labor Day holiday, leaving us with essentially a temperature forecast. Low- level thickness progs suggest Monday highs will run 2-3 degrees warmer than today, with most of the greener locations topping out around 90 while lower 90s will be predominant in the more urbanized areas.
Because of the juxtaposition of this disturbance beneath a 593 dam ridge, weak mid-level subsidence and radiational cooling have allowed for moisture to pool in the overnight hours. Our trough will be picked up by a more amplified low ejecting into the upper Midwest and move back east.
The remainder of the holiday weekend looks uneventful as high pressure settles off the southeast U. Daytime highs will be near normal in the lower 90s, but with the drier air, dew points dipping into the 60s, it won't feel nearly as bad as it did a few days ago.
A large upper low pressure system extending down to the southern Great Basin and California is grabbing a heck of a lot of atmospheric or tropical moisture and ushering it into the Northern Rockies, especially across central Idaho across to southwest Montana. Low pressure at the mid levels will intensify tonight through Monday and move through the Northern Rockies, primarily south of the I-90 corridor and bring widespread rains.
1041 AM PDT Sun Sep 3 2023 An upper low will bring cooler temperatures, more cloud cover, and a few light showers to the region this weekend. Various cloud layers and areas of light measurable drizzle to light rain due to cooler air accompanying the low pressure system over northern California continue this morning. (Today and tonight) A closed upper low initially over northwest CA will devolve to an open-wave trough while progressing into the Great Basin.
Discussion: High pressure will be centered over the Appalachians through the period, keeping a dry pattern across the region.
These showers will grown in number today as a low pressure system (indicated by the counter- clockwise circulation as seen in Radar) continues to move northward today.
(Now through Monday) Our "cooler" and slightly soggier pattern will be coming to an end on Monday. The upper level low that has been slowly progressing westward across the northern Gulf will make its final move into Texas. High pressure will begin to build into the area leading to a reduction in rain chances across most of the area. BB/03 (Monday night through Sunday) Temperatures will continue to trend warmer through this week as an upper level ridge continues to build over the area. High temps will warm back into the mid and upper 90s by the middle of the week with heat index values in the low 100s.
Temperatures will continue to reach the upper 80s to lower 90s each afternoon during the short term, but with the lower dew points, heat indices will remain in the low to mid 90s as the long holiday weekend comes to a close.
1132 AM PDT Sun Sep 3 2023 A passing low pressure system will bring additional cooling to central California today, along with a few showers and thunderstorms, and areas of gusty winds this evening. The primary effects from this will be cooler temperatures and chances for showers in the mountains, along with gusty winds over the Sierra Nevada crest and below the passes in eastern Kern County. As the low moves inland, we will remain in a cool northwest flow pattern aloft for at least the next couple of days.
The plains will cool into the low to mid 60s, the valleys sinking into the mid 40s to low 50s, and the mountains falling into the upper 30s to 40s.
Temperatures will be much cooler today with highs generally in the mid 60s to low 70s for the area. Cooler temperatures and increased rain chances into tonight as a frontal moves across the area.
Westward moving shower activity with a few embedded isolated thunderstorms is ongoing along an arc from the northern Oregon coastal waters to the Hwy 26 corridor between Astoria and Hillsboro as of 3 AM Sunday as a weakening upper level low remains parked over northern California. The departure of the CA low will allow onshore flow to become re-established across the area this afternoon, helping to keep temperatures 10-15 degrees cooler than yesterday across many locations as inland highs only reach the mid 70s and coastal temperatures moderate back into the low to mid 60s.
1200 PM CDT Sun Sep 3 2023 Updated aviation section for 18z taf issuance So far this weekend, our region has been warm and dry under the influence of a 500 mb ridge extending from the central Plains to the Tennessee Valley. A cutoff low over northeast Texas has been blocked by this ridge. The mid-level ridge will retreat to the east, allowing the mid-level flow to become southerly by Monday. Though a few spot showers cannot be ruled out this afternoon in se Missouri and far west Kentucky, there will still be enough ridging aloft to suppress convection.
The influence of the high pressure will keep weather conditions benign through the short term period. As the high settles in over north Georgia tonight, winds will be light and variable across the majority of the forecast area. On Monday afternoon, highs will run 0-4 degrees above normal in central Georgia and 4-8 degrees above normal in north Georgia, reaching into the low 90s across the area.
- A cold front crosses the area on Monday night, with gusty northwest winds up to 35 mph during the evening.
For the Labor Day holiday, we'll see much of the same, with development again expected to be focused moreso west of the I-55 corridor, nearer the influence of the pesky mid/upper low and away from surface ridging situated to our east. But with the highest rain chances largely coinciding with these areas and duration expected to be fairly short, we will continue to leave heat stress concerns out of the HWO as of now.
(This afternoon through Monday night) Tonight will have an upper low along the Red River separating the ridge over W TX from the ridge over the SE States. While this is occurring a trough will move over ID/NV. This trough will swing over WY/MT Monday while the TX low opens up and moves into AR/MO Warmer lows tonight with 70s across the Permian Basin and generally 60s elsewhere. Lows Monday night a couple degrees warmer than tonight.
303 PM EDT Sun Sep 3 2023 High pressure will remain over the area through the first half of this week with dry weather.
High pressure will sink over the area through tonight with a few quick showers ending near and south of St Augustine. Ridging aloft and subsidence will allow lows to cool below normal into the mid 60s away from the coast along and north of I-10 and down to the upper 60s south of I-10 and for inland north central FL areas overnight while staying near normal in the low to mid 70s from the St Johns river eastward to the coast of NE FL and also coastal SE GA.
An unseasonably strong trough along the California coast will advance inland through Monday, continuing the deep marine layer and cooler conditions for the next few days. As westerly flow prevails, the mid and upper levels will dry out, but the low levels will continue to remain moist, so a deep marine layer will be supported for the next couple of nights. This trough will also bring gusty west winds through the passes, on the desert mtn slopes and into the deserts, with gusts up to 60 mph.
1127 AM MDT Sun Sep 3 2023 Water vapor shows upper low over northern CA with ridge axis across the Rockies, and west/southwest flow extending through the Northern Plains. At the surface, trof is shifting into the eastern Dakotas.
Finally, a few isolated showers and storms will be possible tomorrow across our far southeastern counties (Atoka and Bryan) as an upper low meanders across eastern Oklahoma.
An upper low will bring cooler temperatures, more cloud cover, and a few light showers to the region this weekend. Various cloud layers and areas of light measurable drizzle to light rain due to cooler air accompanying the low pressure system over northern California continue this morning. (Today and tonight) A closed upper low initially over northwest CA will devolve to an open-wave trough while progressing into the Great Basin.
Upper ridge remains overhead, with high pressure to our east. Temperatures will be in the low-mid 90s for most, with nighttime temps around 70. Fortunately, the lower humidity today will help keep heat indices down.
An upper low will bring cooler temperatures, more cloud cover, and a few light showers to the region this weekend. Areas of light measurable drizzle to light rain due to cooler air accompanying a low pressure system over northern California continue exiting to the east this afternoon. The low pressure system will continue to move eastward exiting northern California tonight and early Monday. A shallow layer of cooler air will arrive along the California coast tonight and Monday morning, resulting in low clouds and at least patchy fog. High temperatures Monday will be warmer than today, however still 5 to 8 degrees below early September normals.
This coupled with some upper level support (most notably the negatively tilted H5 trough over the ArkLaTex and midsouth region).
1244 PM MDT Sun Sep 3 2023 Overview: A pronounced upper level ridge persists over the central CONUS. downstream of a stalled/cut-off low along the Pacific Coast (centered over northern CA at 08Z this morning). Today-Tonight: The pronounced upper level ridge over the central CONUS will maintain control of, or influence over, sensible weather across the Tri-State area.
The dome of high pressure is forecast to shift off to the southeast toward the Mid-Atlantic through the day Monday.
Warmer and drier beginning Labor Day with temperatures returning to near normal around mid-week. By late tonight, the aforementioned upper low will be mostly east of us, leaving us under northwest flow, and allowing the door to remain open for additional waves to move across northern CA.
120 PM EDT Sun Sep 3 2023 High pressure will remain over the area through the first half of this week with dry weather.
(Tonight) To our west, an upper level low continues to spin across northeast TX/southern OK this afternoon. To our east, high pressure is centered over NC/SC.
236 PM CDT Sun Sep 3 2023 The persistent mid level ridge over the Northern Plains will start to breakdown this period. An upper trof currently near the west coast of California will get ejected into the Northern Plains over the next couple days. However, for Monday night/Tues that thermal ridge will subside as the heart of the upper trof pushes across the forecast area.
This is due to a closed low over north Texas that will gradually be pulled away to the northeast by a longwave trough exiting the Intermountain West. Until then, temperature minimums tonight will fall into the mid-70s under mostly clear skies after lingering evening thunderstorms diminish, however, dew points will remain in the lower 70s for all zones, returning us to our typical muggy summer nights this week.
(Through Tonight) All eyes are on the currently largely stationary upper low highly evident in satellite and radar imagery centered over southeastern Denton County, Texas. The upper level low remains forecast to move very slowly northward tonight, centered along the Red River daybreak tomorrow. Expect overnight lows to be warmer in most spots than observed this morning, with increased low level moisture areawide. Increased cloud cover areawide should lead to afternoon temperatures a touch cooler than expected today.
202 PM EDT Sun Sep 3 2023 Underneath strong upper level ridging, hot and mostly dry conditions are expected through mid to late week. Given the moderating airmass, lows in the lower to middle 60s. Little if any changes other than hotter temperatures Monday as high pressure remains strong from the surface aloft. Highs in the lower to mid 90s are expected with lows in the upper 60s to lower 70s.