Aikyam-Lab/Synoptic-Bench huggingface dataset:
/issued 238 AM CST Sat Jan 20 2018/ Clouds have returned to the Midsouth as a weak trough and associated cutoff low track along the Northern Gulf Coast. Out West a much deeper longwave trough is deepening over the Desert Southwest. The Gulf Coast low will continue to track to the East gradually weakening while the Trough out West deepens resulting in strengthening Southwest flow across the Midsouth. Sunday will be even warmer but still cloudy with a chance of light rain, mainly West of the Mississippi River. Sunday night the deep trough out West will shift over the Plains and accelerate its movement to the East.
326 AM MST Sat Jan 20 2018 Water vapor currently shows upper trof moving across the western CONUS, with strong 125kt jet extending from Utah through the Northern Plains into the Great Lakes. As upper trof moves towards the Rockies today, strong jet lifts through the area, with right entrance region across western South Dakota this evening. As upper low closes off tonight and shifts into the central plains Sunday, snow will shift southeast.
A weak upper trough passing by to our north will be followed by at least some clearing of the middle and high clods today.
High pressure over the Great Basin and a low pressure trough in Alberta will combine for breezy to windy conditions over North Central Montana through the weekend.
Most parts of the Texas and Oklahoma Panhandles expected to rise well into the 70s today as west and southwest winds continue as surface trof traverses area. Pacific cold front passes Sunday morning as closed mid-level low crosses the western Oklahoma Panhandle. Polar cold front arrives during the afternoon in Oklahoma Panhandle and northern Texas Panhandle, shifting winds to northwest.
957 AM EST Sat Jan 20 2018 High pressure will prevail this weekend.
416 AM CST Sat Jan 20 2018 The midlevel trough of interest is currently located over CA and is forecasted to continue progressing eastward over the Four Corner region today. If the higher dew points can manage to reach this area then fog could develop especially along the northern edge of the stratus. Guidance is trending warmer with the temperatures tonight so the chance for freezing drizzle is now confined to far north central KS. Again the remaining snow pack could contribute to sub-freezing temperatures at these locations by Sunday morning. Temperatures are forecasted to rise above freezing and the isentropic ascent should migrate to NE. Most of the models suggest the initiation of showers and storms along the prefrontal trough or synoptic dry line as it quickly races eastward.
So far, no drizzle was being reported at stations across Missouri, though some of the high-res models hint at some development by mid afternoon over our area. 08z/2am temperatures are generally in the lower to middle 30s, with a few readings near 40 degrees across the far W/SW KILX CWA. 00z Jan 20 models are in good agreement concerning the track of the low from central Kansas 00z Mon.
Late tonight, moisture will increase in the lowest 2 km and with modest lift on the 280 to 290 K isentropic surfaces, some light drizzle/freezing drizzle is possible across portions of northeast IA into far southwest WI. Temperatures tonight will generally be in the mid 20s into the lower 30s. Freezing potential will diminish into the late morning and afternoon as temperatures warm, but some additional light icing is possible in the morning across northeast IA into southwest WI.
temperatures are ranging widely this morning from the mid 20s up to the lower 30s w/ mainly clear skies and light winds. one more nice above normal day for temps is set for the area with the remnants of the upper ridge slowly breaking down ahead of a storm system for the latter half of the weekend. Low pressure at the surface will aid in bringing in some WAA into the region allowing for daytime highs to reach mainly into the 50s. This will allow some light freezing rain to start over the area.
923 AM EST Sat Jan 20 2018 Low pressure will track north of Maine today drawing a cold front across the region tonight.
600 AM EST Sat Jan 20 2018 A warm front will pass later today, with some sprinkles or light rain possible.
High pressure will pass to the north of the region with light and variable winds through tonight.
Otherwise, 500 mb high pressure will transition from west to east across the Lone Star State as closed 500 mb low pressure follows closely on its heels over the Four Corners area.
This deck of clouds has done a good job reflecting returning long-wave radiation back to the surface and consequently warmer temperatures for the area.
704 AM EST Sat Jan 20 2018 High pressure will pass through the southeast states this weekend.
Showers and a few thunderstorms are expected to develop by late Sunday afternoon and Sunday evening along and ahead of the dryline and Pacific cold front which will overtake the dryline Sunday evening.
336 AM MST Sat Jan 20 2018 High pressure over the Great Basin and a low pressure trough in Alberta will combine for breezy to windy conditions over North Central Montana through the weekend.
Later tonight, flight conditions are expected to deteriorate rapidly as a warm front lifts into the area. This is within a region of warm air advection out ahead of low pressure organizing in the Plains. Surface temperatures will be increasing, but if we moisten up enough for drizzle early enough on Sunday morning, then temperatures will still be below freezing and we could see some freezing drizzle cause a light glaze. Temps will warm above freezing by mid Sunday morning and precip type will become all rain in southern WI.
The cold front will be just west of the Colorado/Utah border towards the evening hours so expect rain for the valleys through the day with snow above 8 to 8. Once the cold front moves through, temperatures will start dropping and snow levels will reach valley floors. Outside of the showers, expect a mostly cloudy day with cooler temperatures across the region.
754 AM EST Sat Jan 20 2018 High pressure will maintain dry and warmer weather through today. Otherwise high pressure will keep the region dry today. Intensifying warm advection under building upper high pressure in advance of a Cntrl Rockies-to-Plains low will drive Upper Ohio temperature well above the averages for the start of the new week.
341 AM PST Sat Jan 20 2018 Dry and cool conditions will prevail this weekend as weak high pressure moves over the region.
Elongated, east-west oriented high pressure across the Gulf Coast States, through north FL and out into the western Atlc, all just north of ECFL.
556 PM EDT Tue May 16 2017 High pressure through Wednesday with increasing temperatures. I did adjust Elkins low temperature down a few degrees based on current dew points and overall model guidance values cooler than current forecast. Upper level ridging in place providing mainly clear conditions and very warm air with the passage of a warm front earlier this morning. Do have concerns that slight might need to be added to the highest ridges in Randolph/Pocahontas for Wednesday, but will go dry for now.
Strong upper level ridge shifts east across the OH/TN river valleys and into the Appalachians by evening, keeping strong cap in place over CWA and keeping dry conditions through tonight with convection staying north and west of central IL. Mild lows in the mid to upper 60s which are not too much cooler than normal highs for mid May.
For Wednesday, ridge of high pressure will remain in control keeping. The upper-level ridge that has brought us this very warm and dry weather will gradually slide east of the area off the Carolina coast.
431 PM EDT Tue May 16 2017 Aviation section updated Dry weather under high pressure continues until Wednesday night. Lows should be in the low to middle 60s with southwesterly flow and used a MOS average which should do well given the relatively unchanging airmass. Wednesday should be dry with Indiana still sandwiched between high pressure to the southeast and low pressure to the west. Wednesday night still looks like upper ridging will control the weather over much of the area, but NAM/GFS/ECM are all in agreement with putting some qpf over the southwestern counties associated with a weak upper wave.
220 PM EDT Tue May 16 2017 High pressure will gradually shift offshore through tonight, allowing a strong warm up through Wednesday.
326 PM EDT Tue May 16 2017 High pressure through Wednesday with increasing temperatures. Upper level ridging in place providing mainly clear conditions and very warm air with the passage of a warm front earlier this morning. Do have concerns that slight might need to be added to the highest ridges in Randolph/Pocahontas for Wednesday, but will go dry for now.
158 PM CDT Tue May 16 2017 The upper level ridge continues to bring above average temperatures along with dry conditions to the mid state.
411 PM MDT Tue May 16 2017 An upper level low over NM is expected to move northeastward tonight acrs the far sern corner of CO and then into northwest KS by 12Z Wed. By late night, the mtns and high valleys should have little chance for pcpn, while wrap-around pcpn on the back side of the upper low, is expected to be found over the eastern plains. Wed afternoon that upper low will continue moving east and into wrn IA by evening. At the same time, a new upper level low is expected to move into southern ID. Ahead of the ID upper low, mstr and pcpn chance are expected to increase again along the Continental Divide.
An upper level low pressure area was located over southern Arizona early this afternoon with a weather disturbance ahead of it initiating some thunderstorms across the far west and east-southeast parts of the forecast area. Around and shortly before sunrise wraparound moisture/precipitation increases behind the departing wound up low pressure center. The first of two upper lows continues northeast of the region Wednesday night reaching the Great Lakes. Dry conditions return to much of the area with upper ridging building in behind the low.
Today will likely mark the first day of 2017 with widespread temperature readings in the lower 90s. Increasing southerly boundary layer winds tonight will result in warmer temperatures than this mornings readings.
Main feature this period is an upper low that drops southeast out of the Pacific NW tonight and into the central Rockies Wednesday.
There will be this initial batch of storms, with more widespread development later tonight associated with upper low now moving into southern AZ/NM. The higher chance for storms will be after midnight as a squall line organizes west and affects eastern Oklahoma overnight.
309 PM CDT Tue May 16 2017 High pressure settled over the southeastern U.
236 PM CDT Tue May 16 2017 Deep southerly flow is in place across the central US today, helping to again boost temperatures in the low to mid 80s. A dryline is currently aligned from the Texas and Oklahoma Panhandles into western Kansas, where it merges with a cold front that extends north into the eastern Dakotas. An upper level low will then lift northeast across Kansas and Nebraska tomorrow, nudging a weak frontal zone southeast into the forecast area.
The low levels of the sounding right now are not favorable for tornadoes. Putting this all together, the highest tornado threat is expected to be south of Highway 50 and near the Oklahoma border.
The upper flow pattern will briefly become more west to east, as the upper trough moves east of our area. Temperatures will remain on the cooler side, with highs and lows closer to seasonal normals.
The dryline is then forecast to retreat slightly to the west this evening, as a Pacific cold front approaches from the west. Slightly cooler temperatures along with gusty west winds are forecast on Wednesday behind the Pacific front. However, the next upper level low will be moving into the four corners region. Moisture return will quickly take place Wednesday night ahead of this trough.
Afternoon temperatures had warmed into the lower-middle 80s.
Upper level ridge axis was beginning to shift east of the area with southerly low level warm advection. For today, upper level ridge axis will continue to exit to the east as a trough swings eastward over the Rockies and an upper level jet begins to round the base of the trough into the high plains.
Forecast soundings show a fairly well capped atmosphere as the ridge holds firm across the southeastern U. As a low pressure system swings across the Plains tomorrow, tightening pressure and height gradients will lead to stronger southerly winds in the ArkLaMiss. Convection associated with the trailing cold front is still expected to remain west of our CWA as ridging surface and aloft centered just off the southeast coast remain dominant over our CWA.
337 PM EDT Tue May 16 2017 As a result of strong low pressure moving northeast out of the central plains. upper ridge over the forecast area will gradually slide toward the Atlantic coast during the short term. Models have been slowing the trailing cold front and it looks like it will begin to affect our area just beyond the short term period. 17 Forecast looks on track with mid-level ridging across the area through the end of the work-week.
Later on this evening as the dryline begins to retreat west, it will converge and combine with an advancing cold front as the powerful and compact upper level low ejects out of eastern New Mexico across the Texas Panhandle overnight and into the Central Plains by Wednesday morning.
Upper low currently centered over AZ, NM, will continue to slowly move east tonight bringing the upper jet/increasing diffluence closer to the CWA as well as an embedded short wave.
255 PM MDT Tue May 16 2017 An upper level low pressure area was located over southern Arizona early this afternoon with a weather disturbance ahead of it initiating some thunderstorms across the far west and east-southeast parts of the forecast area. Around and shortly before sunrise wraparound moisture/precipitation increases behind the departing wound up low pressure center. The first of two upper lows continues northeast of the region Wednesday night reaching the Great Lakes. Dry conditions return to much of the area with upper ridging building in behind the low.
Warm and dry conditions will prevail through Wednesday with high pressure over central Indiana. The pattern will become more active though starting Wednesday night as an upper low tracks from the Central Plains to Upper Midwest.
The higher elevations of the Sierra will see a few inches of accumulating snow.
Deep layer ridge will continue to build over the region today, keeping the weather dry and warm. No significant changes needed to the forecast with temperatures expected to reach the lower to mid 90s this afternoon.
327 PM CDT Tue May 16 2017 An active weather pattern is expected much of the week with severe weather, strong winds, fire weather, and even a strong cold front (for mid May) likely to affect the area. An upper trough currently to our west will lift northeast into the Plains overnight. Even stronger winds are expected this evening behind a Pacific cold front so have issued a Wind Advisory for western portions of the area. Height falls associated with the upper trough will act to pull the dryline back west early this evening to about the central Permian Basin. At the same time a Pacific cold front will quickly move east across the area and collide with the dryline. These storms will shift east into the Big Country overnight with cooler, drier conditions behind the cold front.
High pressure will continue to exert itself over the southeastern CONUS today helping temperatures to climb into the low 90s in several spots and mid to upper 80s for most.
A strong upper trough swings through the 4-corners region late this afternoon and across the forecast area by early Wednesday morning. The moisture and precipitation associated with the low are expected to wrap around the low tonight and into early Wednesday with precipitation lifting out of the forecast area by Wednesday afternoon as the low moves into eastern Nebraska and western Iowa. High temperatures on Wednesday will be nearly 10 degrees cooler than Tuesday.
/Issued 354 AM EDT Tue May 16 2017/ With a strong upper ridge across the region and the summer-like Bermuda high to the east, expect increased southerly low level fetch and abnormally warm conditions to persist thru the short term. The 500mb ridge will have drifted e and s of the area and a weak short wave will move across the nw portion of the forecast area Wednesday night but looks to have little available moisture to work with so no significant pops will be associated.
Overnight, an upper level trough across the Four Corners Region will quickly eject eastward into the Plains which should produce an active convective outbreak of strong to severe thunderstorms across the OK/TX Pndl region of the country. With all the energy to this upper level trough remaining well to our north on Wed, any convection across our region will be very scattered in nature and tied to any kind of remnant outflow and/or differential heating boundaries as they develop with cloud breaks Wed Aftn. Southwest flow aloft will continue to deepen across the Southern Plains Wed Night into Thu as another trough of low pressure digs into the Four Corners Region.
Meanwhile, an upper level ridge is noted across the western Gulf of Mexico into the forecast area. Daytime acting on the low level moisture for scattered fair weather cu to develop, with upper level ridging keeping any cu from forming into significant shower activity. The tail end of the short wave will bump into and slightly weaken the upper level ridge over the forecast area.
Dry weather under high pressure continues until Wednesday night. Lows should be in the low to middle 60s with southwesterly flow and used a MOS average which should do well given the relatively unchanging airmass. Wednesday should be dry with Indiana still sandwiched between high pressure to the southeast and low pressure to the west. Wednesday night still looks like upper ridging will control the weather over much of the area, but NAM/GFS/ECM are all in agreement with putting some qpf over the southwestern counties associated with a weak upper wave.
The higher LCLs of 1250 to 1500m help limit the tornado threat. The main concern is heavy rain as an inverted trough of low pressure remains stationary over the region. A stationary front as seen in the H925 winds and isotherms will stall out across the region as the low level jet strengthens overnight. By 00Z, the low looks to be near far northwest Iowa with the warm front extending to the northeast.
Much colder air from Canada will move in and we'll likely see frost two or three nights this week as overnight lows dip in the low 30s.
415 PM MDT Tue May 16 2017 An upper level low over NM is expected to move northeastward tonight acrs the far sern corner of CO and then into northwest KS by 12Z Wed. By late night, the mtns and high valleys should have little chance for pcpn, while wrap-around pcpn on the back side of the upper low, is expected to be found over the eastern plains. Wed afternoon that upper low will continue moving east and into wrn IA by evening. At the same time, a new upper level low is expected to move into southern ID. Ahead of the ID upper low, mstr and pcpn chance are expected to increase again along the Continental Divide.
114 PM EDT Tue May 16 2017 High pressure will result in dry and very warm conditions through mid-week.
As the surface and upper level low track across the heart of the local area tomorrow. Expect multiple chances for showers and thunderstorms across the local area through the extended periods as an upper level low meanders across the intermountain west sending multiple impulses across the local area from time to time. With relatively cooler air in place across the region.
Broad southwest flow aloft will increase over the next few days a slow-moving trough moves east across the Southern Rockies.
453 PM EDT Tue May 16 2017 This afternoon through tonight: Latest water vapor imagery shows a large dome of high pressure ridge dominating the eastern CONUS. Wednesday through this weekend: As high pressure establishes itself near Bermuda by mid to late week, easterly winds will become breezy, especially along the immediate Atlantic coast.
250 PM EDT Tue May 16 2017 High pressure will gradually shift offshore through tonight, allowing a strong warm up through Wednesday.
The latest water vapor satellite loop shows an upper level low pressure system over the desert southwest. In advance of this low, southerly flow in the low-levels continues with afternoon surface dewpoint temperatures currently in the mid 60s to lower 70s F.
High pressure then builds in through the remainder of the week with temperatures rebounding back to above normal values late in the week and into the upcoming weekend.
High pressure then builds in through the remainder of the week with temperatures rebounding back to above normal values late in the week and into the upcoming weekend. Highs will continue to be cooler than normal with only upper 50s to upper 60s forecast. Main story for the week will be much warmer weather going into the weekend.
320 PM CDT Tue May 16 2017 The low pressure system that brought showers and thunderstorms to the region earlier today continues to push northeast and away from the area, while another is currently intensifying over Colorado.
with the highest values seeming placed well to our west.
Next issue will be strong west or southwest winds following passage of Pacific cold front this evening. /Issued 315 AM CDT Tue May 16 2017/ Closed off upper level low near Las Vegas, NV will open up as it moves this way today and tonight. As this upper level feature approaches the panhandles today, upper level diffluence will increase, low level moisture will increase and the lower and mid level shear will increase. A Pacific cold front will sweep across the panhandles by late this evening and this should touch off another round of thunderstorms when it catches up to the dryline, but these are expected to be east of our area.
Winds could remain strong tonight as the upper low moves into the Southern Plains and a low-level jet develops. All eyes will be on the Texas Panhandle/W OK for the severe weather threat as the upper low over the southern Rockies begins to push east and northeast today/tomorrow.
/issued 327 PM CDT Tue May 16 2017/ An active weather pattern is expected much of the week with severe weather, strong winds, fire weather, and even a strong cold front (for mid May) likely to affect the area. An upper trough currently to our west will lift northeast into the Plains overnight. Even stronger winds are expected this evening behind a Pacific cold front so have issued a Wind Advisory for western portions of the area. Height falls associated with the upper trough will act to pull the dryline back west early this evening to about the central Permian Basin. At the same time a Pacific cold front will quickly move east across the area and collide with the dryline. These storms will shift east into the Big Country overnight with cooler, drier conditions behind the cold front.
Forecast soundings suggest at least some weak capping for much of the day, and most of the high-resolution models suggest little in the way of rainfall.
309 PM EDT Tue May 16 2017 High pressure will result in dry and very warm conditions through mid-week.
Dewpoints remain the low/mid 60s with some mixing and with a nice breeze, it doesn't feel too terrible outside. With winds remaining gusty tonight, minimum temperature only drop down into the low 70s. The problem will be the lack of lift since the upper level low now over New Mexico moves into the northern Plains tomorrow.
317 PM CDT Tue May 16 2017 WV imagery this afternoon showing a deep longwave trof cutting through the western CONUS with potent southern tier vort max currently over southern CA/western AZ. relatively weak low pressure was centered in eastern CO with a stagnant thermal boundary extending into eastern Neb then northern IA. A second boundary/cold front was situated from central MN to southwest SD.