Aikyam-Lab/Synoptic-Bench huggingface dataset:
545 PM CST Thu Feb 9 2017 The synoptic pattern early this afternoon features fairly amplified flow, with a deep trough digging into the Northeast and an upstream ridge located across the west-central CONUS. This ridge will build into the Midwest through the period, allowing for a marked increase in temperatures over the next 24 hours. However, as skies clear, surface ridging currently parked over eastern MO will push off to the east which will allow for return flow to commence.
1045 PM EST Thu Feb 9 2017 A weak shear line/cold front moved southward through the Florida Keys a few hours ago. This should happen overnight, as a sprawling high pressure cell containing a continental polar air mass moves quickly southeastward. Strong north to northeast breezes will develop across the Florida Keys and adjacent coastal waters overnight, in the wake of a weak cold front.
943 PM EST Thu Feb 9 2017 With the light winds and mostly clear skies under the high pressure building in, temperatures have fallen quickly tonight with a few spots already in the teens. In addition, southerly winds will pick up just before dawn tomorrow, beginning to bring back in warmer air. Steady southerly flow picks up on the back side of high pressure tomorrow and helps temps climb above normal into the low and mid 50s.
Small craft advisory remains in place for this evening for northerly winds behind the cold front.
and brief freezing rain or snow. A weak front may also bring a brief period of rain and freezing rain to the Helena Valley this evening.
Conditions have warmed over most of the forecast area as a ridge axis moves over the region. With the precipitation diminishing, and temperatures warming, we canceled the freezing rian advisory. Even with the cancellation, left a slight mention of freezing rain in the forecast as ground temperatures are still near or below freezing, and lower valleys in eastern Montana could certainty see some light freezing rain if any precipitation redevelops tonight. Strong mid-level winds around 50 to 60 kts and continued pressure falls over the lower elevations have strengthened the pressure gradient over our western zones and thus we have seen an increase in winds today. As conditions warm further east towards Big Timber and north towards Harlowton, mixing has allowed the higher winds above the surface to mix down and increase the winds there.
/issued 323 PM CST Thu Feb 9 2017/ SHORT TERM (Tonight through Friday Night): High pressure to the north is moving swiftly east ahead of a mid level ridge moving east across the Western United States. As well, high pressure is spreading over the local area and the Gulf. Already seeing increasing cloudiness near the coast as moist gulf air rides up over the lower level cooler air. A tongue of higher dew point air will push back over the Lower Valley overnight. With the light winds and higher dew points near the coast, patchy fog will be possible, but the low clouds will afflict coastal areas and thicken inland overnight as well. High temperatures will be back into the lower to mid 80s for inland areas.
Although wind speeds should generally be less than 10kts thru 10/18Z, sfc ridging influences are expected to shift rather quickly eastward thru 10/24Z, and thus highlighted specific times to illustrate this veering wind direction scenario in forecasts for area terminals.
322 PM MST Thu Feb 9 2017 Strong high pressure will keep unusually warm weather with well above normal temperatures continuing through Friday.
Strong high pressure will lead to unseasonably warm weather through Friday, with increasing southwest winds forecast for Friday ahead of an approaching weather system. A period of active weather is forecast for this weekend as a low pressure system brings cooler temperatures, rain and some high elevation snow to northern Arizona.
308 PM MST Thu Feb 9 2017 Warm temperatures have prevailed across the plains this afternoon as upper ridging built over the state and a lee trough emerged at the surface. Model cross sections show very strong winds over ridgetops by tomorrow afternoon, but the west-southwest wind direction will not favor a widespread wind event. Temperatures are expected to be 5 to 10 degrees warmer than this afternoon, into the mid 70s across the plains. However, freezing levels are going to be starting out quite high, and mountain areas may see a little bit of rain before changing over to snow. A trough of low pressure just off the west coast of CA will increase SW flow over the Great Basin for the weekend.
241 PM MST Sun Feb 26 2017 Cooler than average temperatures will persist the next several days as two fast moving weather disturbances move into the region.
Will maintain some pops across the south but overall confidence on the low side. The next mid level trough will approach the region Monday.
An upper trough off the Washington coast will move south into northwestern Oregon this evening.
1047 AM MST Sun Feb 26 2017 Overnight water vapor loop showed a broad trough across much of the Lower 48. Short wave troughs were located off the British Columbia coast, north-central CA, and north-central plains. Flow aloft backs from west-northwest to west-southwest during the next 24 hours as the next Pacific trough digs south across the northwest CONUS and eventually east through the Intermountain West.
/issued 520 AM CST Sun Feb 26 2017/ For the 26/12z TAFs, VFR conditions should prevail at all sites through at least 27/00z, but clouds will be increasing through the period as an upper trough approaches the region.
153 PM EST Sun Feb 26 2017 High pressure will bring clearing skies this evening.
As a result, relative humidity values have already dropped into the lower 30s along and east of the Mississippi River. /issued 357 AM CST Sun Feb 26 2017/ The surface anticyclone has settled over the Mid-South early this morning, resulting in light and variable winds. Moisture will increase with time as southerly flow persists, resulting in warmer overnight lows and fueling the upcoming rain chances. Temperatures will be warmer across the region this afternoon, with highs generally in the mid 50s to near 60 degrees.
Gusty southwest winds and sunshine will allow temps to rise into the lower to mid 40s this afternoon. Strong southwest winds are expected today as low pressure tracks across Lake Superior while high pressure moves through the Ohio River Valley. High Partly cloudy skies are expected Monday under departing high pressure.
216 PM MST Sun Feb 26 2017 Weak upper ridging is shifting over the Rockies and into the northern plains, while an upper low spins off the Pacific Northwest. Upper flow will become zonal tonight as upper low moves inland.
Ridging at the surface will prevail overnight, with zonal flow aloft.
1046 AM CST Sun Feb 26 2017 Breezy and cool conditions expected today as the high pressure ridge that passed overnight moves into the Ohio River Valley. A ridge of high pressure will shift east of the forecast area early today, with southerly low-level winds pushing today's highs to around 50 degrees. Transition of the southern stream into more of a southwest-northeast configuration is starting this morning, as one upper low drops southeast from San Francisco and a second settles southward toward northwest Washington state. This will bring a couple days of very mild air once again, but no chance of it lingering as long as last week, as a broadening trough tracks east across the Plains during midweek.
1200 PM MST Sun Feb 26 2017 Weak upper wave dropping south through CO early this morning, but very little weather of note with it except for a few flurries over the higher peaks of the Sangres and eastern San Juan mountains. For today, wave moves south of the state by afternoon, leaving only a few flurries lingering over the higher peaks along the Continental Divide. Tonight, mid and upper level flow gradually turn more swly in response to upper trough moving into the Great Basin. It looks like an active start to the work week with warmer and quiet conditions as the week progresses.
/issued 929 AM EST Sun Feb 26 2017/ A nearly zonal flow remains in place aloft this morning while at the surface, high pressure is building over the southeast behind a cold front exiting the southern part of the forecast area. High pressure building in to the north will turn winds more easterly tonight, which will favor a wind surge back into exercise caution range. High pressure will then remain over the region through the next several days, with no other headlines expected after tonight.
Cold start to the morning with lows in the valley in the lower to mid 30s with warm up into the lower to mid 50s for this afternoon. A weak but cold low pressure system will move into the region this afternoon and evening. Expect generally light totals across the Valley overall, and potentially 4 to 8 inches of snow over the higher elevations of the Sierra.
1227 PM EST Sun Feb 26 2017 High pressure will move in from the west today, then move offshore later tonight and Monday.
408 PM EST Sun Feb 26 2017 High pressure over the region will move to the coast overnight.
1228 PM EST Sun Feb 26 2017 VFR conditions will continue through the period at all sites with light and variable winds expected this afternoon as high pressure settles over our area.
Also decided to issue winter weather advisories for the Bridgers and far-southern portions of Beaverhead, Madison, and Gallatin counties, including Monida Pass and West Yellowstone. In fact, spotters in the Bridgers have reported snowfall rates reaching several inches per hour for a time earlier this morning. The Bridgers may experience some additional bursts of heavy snow.
Westerly winds will diminish this evening as weak high pressure moves overhead. Clear skies will allow temps to fall into the lower 20s tonight.
106 PM EST Sun Feb 26 2017 Cool high pressure with critical RH will build into the region today, then shift offshore tonight and early this week, as a warm and moist air mass gradually builds from the Atlantic and Gulf of Mexico.
1157 AM EST Sun Feb 26 2017 High pressure will bring clearing skies this evening.
251 PM EST Sun Feb 26 2017 Local waterways continue to recede as cooler temperatures prevail and light snow shower activity decreases.
252 PM EST Sun Feb 26 2017 High pressure over the area will move offshore late tonight and into the day on Monday.
A southwest moving, "back door" Canadian cold front continues to move across Western Montana resulting in snow and gusty winds to the Continental Divide. However farther to the south the situation continues to evolve as the cold front further interacts with deepening moist flow aloft.
230 PM MST Sun Feb 26 2017 The upper level flow in the atmosphere shifts to southwesterly tonight ahead of a developing trough of low pressure near the west coast of the country. On Monday the trough slowly moves east but remains well west of the rockies. Looking at readings in the low teens west to low 20s east. The better performing bias corrected grids along with met/mav and 2m guidance are a bit cooler averaging around 50 in northwest Yuma county where some snow cover exists to the mid/upper 50s elsewhere.
A weak, elongated surface pressure trough extended southward through the Central Plains. Another weaker impulse ejects northeastward across Kansas/Oklahoma Monday ahead of the upper trough in the west.
126 PM EST Sun Feb 26 2017 High pressure over the region will move to the coast overnight.
High resolution models are supportive of some light convection developing on maritime return around 3 am but well out ahead of the more organized trough-induced convection. SPC currently is indicating a marginal risk for severe storms with some limitations noted on what should be a capped layer in the lower levels that may need to be overcome. Mardi Gras Day still appears to be between systems, but with temperatures reaching the lower 80s in some locations, an isolated shower or two can not be ruled out, but most should remain dry.
1229 PM EST Sun Feb 26 2017 Aviation There will be a chance of light snow across central and northern Lower Michigan today as low pressure tracks across the northern Great Lakes.
1221 PM EST Sun Feb 26 2017 Local waterways continue to recede as cooler temperatures prevail and light snow shower activity decreases.
227 PM CST Sun Feb 26 2017 It's been a quiet day across Middle Tennessee with high pressure centered over the eastern part of the state.
Surface wise, An expansive region of high pressure is centered along the Southeast United states with a ridge extending down the Florida peninsula and the adjacent Gulf and Atlantic ocean.
242 PM EST Sun Feb 26 2017 High pressure will return to the area tonight and Monday.
The low-level convergence zone near I-35 is aiding light to moderate showers as of 3pm but some stronger updraft growth could occur through the late afternoon and evening as stability decreases farther north in conjuction with the deeper ascent shifting across the region. Once the low clouds/fog mix out, the southwest flow will allow for well-above normal temperatures as many areas reach into the 80s.
353 PM CST Sun Feb 26 2017 For tonight, scattered showers/storms will be possible across southeast Oklahoma as isentropic ascent increases and a warm front lifts northward.
1224 PM EST Sun Feb 26 2017 Local waterways continue to recede as cooler temperatures prevail and light snow shower activity decreases.
343 PM EST Sun Feb 26 2017 A ridge of high pressure will build east across Pennsylvania today, then off the east coast Monday.
This will cut off radiational cooling after midnight and will keep temperatures above freezing for a large portion of the area tonight. This is in slight contrast to the latest GFS and NAM MOS guidance that continue to suggest subfreezing temperatures throughout the area, exception being CHA and points south and west. An upper level trough will make it's way slowly east from the Western U. As it does so, warm and moist air will override a cooler air mass in place across the Southern Appalachians. Scattered showers and even a few thunderstorms will occur in this warm frontal push into the Southern Appalachian region.
322 PM EST Sun Feb 26 2017 High pressure will push off the East Coast through Monday. The high will remain over the Atlantic through the middle of the week with the forecast area under its western periphery.
1158 AM CST Sun Feb 26 2017 /18Z TAFS/ VFR conditions will resume early this afternoon at our southern TAF sites as the low cloud cover breaks up. Afternoon highs today will be in the low to mid 70s under mostly cloudy skies. Given the expected cloud cover encompassing the entire CWA by tonight, morning lows tomorrow will be warmer, in the the upper 40s to around 50 degrees.
335 PM CST Sun Feb 26 2017 A warm front is developing south of the Red River with increasing warm air advection. Upper flow becomes increasingly southwest on Monday ahead of a positive tilt upper trough now moving south along the West Coast. a warm front will lift north across eastern Oklahoma and western Arkansas by Monday night with low end chances for showers or isolated thunder.
With some high cloud cover also overspreading the area, temperatures will be mild tonight with lows expected to range from the mid to upper 40s across the northwestern part of our area, to the lower 50s across our southeastern counties. On Monday, a stronger upper trough will move east across the Intermountain West and Great Basin, into the central Rockies by late afternoon.
241 PM CST Sun Feb 26 2017 An area of low pressure currently over southwest ND will slide eastward some tonight. This system will leave behind a trailing cold front which should be draped east, west across the region. With a developing low pressure system over western South Dakota on Monday, the cold front should lift northward as a warm front with temps climbing into the 40s for most of this CWA. The GFS shows the warm front along the ND/SD border with sharp temperature contrast. If the front stalls over this CWA then temperatures could be as much as 10 degrees cooler.
1153 AM EST Sun Feb 26 2017 Partly to mostly sunny skies with moderating temps into the low to mid 40s this afternoon. and have afforded a bit warmer than blend/prior forecast as well as a slight upward nudge to lows tonight in absence of fully decoupled boundary layer.
A weak but cold low pressure system is moving into the region this afternoon and evening.
255 PM EST Sun Feb 26 2017 High pressure centered over southern Ohio will move off the Virginia Coast on Monday.
244 PM EST Sun Feb 26 2017 A ridge of high pressure will build east across Pennsylvania today, then off the east coast Monday.
344 PM EST Sun Feb 26 2017 High pressure will move over the area tonight then off the Virginia and North Carolina coast Monday morning.
1149 AM CST Sun Feb 26 2017 Breezy and cool conditions expected today as the high pressure ridge that passed overnight moves into the Ohio River Valley. A ridge of high pressure will shift east of the forecast area early today, with southerly low-level winds pushing today's highs to around 50 degrees. Transition of the southern stream into more of a southwest-northeast configuration is starting this morning, as one upper low drops southeast from San Francisco and a second settles southward toward northwest Washington state. This will bring a couple days of very mild air once again, but no chance of it lingering as long as last week, as a broadening trough tracks east across the Plains during midweek.
1210 PM EST Sun Feb 26 2017 Local waterways continue to recede as cooler temperatures prevail and light snow shower activity decreases.
156 PM CST Sun Feb 26 2017 Leeward troughing will induce a wind shift to the south later tonight, then increasing to around 5 to 15 mph on Monday. Otherwise warmer air will advect into the area, with H850MB temperatures rising several degrees.
106 AM EDT WED JUN 8 2016 Trough axis aloft tonight affects northern zones. Center of high pressure crosses Wednesday night.
153 AM EDT WED JUN 8 2016 An upper level trough will rotate across the area tonight with high pressure building across the region on Wednesday and Thursday.
/ISSUED / An upper ridge building over the center of the country will result in very warm and increasingly humid weather over the next few days.
A weak mid level low over the great basin situated south of the ridge axis will migrate into the region Wednesday. Extended starts off with the hot upper ridge in place over the region. Eventual placement of this boundary may be the difference of 5 degrees or so on the cooler side.
There are a few clouds developing along and just ahead of approaching dry cold front now moving into N GA. This cold front is not expected to bring any more precipitation to the area just usher in a drier cooler airmass from the Northern Plains. This cooler airmass will take low temps tonight down into the 50s across N GA and into the 60s across Central. An east coast mid level trough will be the dominant feature through Thursday before flattening out and lifting northward.
A cold front moving southeastward across northern New York and Vermont tonight will usher in much cooler air and result in a few lingering showers during the overnight hours. An upper level trough in place will bring considerable cloud cover with chances for showers both days.
302 AM CDT WED JUN 8 2016 High pressure will dominate the weather across central Illinois today, providing mostly sunny skies and much lighter winds than have been noted in recent days. Despite cool early morning lows in the lower to middle 50s, dry airmass will heat efficiently today. Adjusting forecast soundings to an approximate mixing height of 800mb this afternoon yields high temperatures in the middle to upper 70s, which is a couple of degrees warmer than numeric guidance. As the high shifts east of the region, WAA will begin tonight.
610 AM EDT WED JUN 8 2016 Cool high pressure builds in today.
This is fairly close to the warmer met guidance. yet another batch if mid level moisture moves through the area associated with an upper trough passage.
Today Through Thursday Night A large area of high pressure is over the western two thirds of the country with an upper trough over the eastern third. The upper ridge will spread eastward through the period and will encompass much of the country by Thursday night. With high pressure in control. Temperatures will continue in the mid 80s to lower 90s for highs and in the lower to mid 60s for lows.
123 AM EDT WED JUN 8 2016 Low pressure will remain stalled to our northwest overnight then slowly move to our northeast on Wednesday.
Southwest flow strengthens over the area today as an upper trough advances toward the Pac NW. Ahead of the trough, the airmass dries out and warms up over much of southeast Oregon and southwest Idaho. By late afternoon a cold front accompanying the upper trough will advance into east-central Oregon, bringing a sharp wind shift, cooler temperatures and a slight chance showers and thunderstorms to Baker county and northern Harney and Malheur counties. Conditions remain dry into Thursday as the center of the trough stays along the WA/OR coast. The most notable change on Thursday will be the temperatures, which will be 10-15 cooler than today (though still above normal).
335 AM PDT WED JUN 8 2016 A ridge of high pressure will keep the weather hot and dry for the next few days. Cooling will occur however as a trough of low pressure moves into the Pacific Northwest beginning Thursday. An upper ridge will continue to dominate the weather pattern today across the central CA interior. Some local gusty winds occurring below the kern county mountain passes overnight due to strong onshore gradients from the coast to the high desert. An upper trough and associated cold from will move into N Ca. The upper trough to our north is progged to slowly move through the PAC NW and N CA.
The ridge of high pressure will shift east through the Northland Wednesday, bringing light southwest or southerly flow to most areas by the afternoon, and ushering in warmer air into the region. Leaned on the warmer models because the humidity will still be fairly low, such as the GFS. While most areas should reach the upper 60s and lower 70s, it will be cooler in the upper 50s and lower 60s along the immediate North Shore because of the light onshore flow. Wednesday night finds upper level ridging building toward the forecast area from the West. The upper ridging covers the region on Thursday and have removed the rain mention.
421 AM MDT WED JUN 8 2016 Weak wave will be pushing across the forecast area today ushering in cooler air aloft and driving precipitable water values up to around three quarters of an inch by this afternoon. This system exits the area tonight with the ridge building back in on Thursday.
313 AM CDT WED JUN 8 2016 Warmer temperatures and increasing south winds will return to Kansas for today.
228 AM CDT WED JUN 8 2016 07z satellite and water vapor images are showing plenty of dry air and no clouds over the area with temps in the lower to middle 60s in the wake of a cold front. A deep upper ridge currently over much of the western U. Even with light winds out of the northwest, the slow rise in 850 temps in response to the ridge and the sunny skies will create a warming trend.
331 AM CDT WED JUN 8 2016 (Today and Tonight) The overall upper level ridging from the southern California coast into Texas will continue to dominate the weather for our region. There is a weak upper low trapped within the ridging along the Gulf Coast which has sparked a few showers and storms in the Brownsville to Corpus Christi area. Tonight, have gone a few degrees cooler than models suggested in some of our low lying areas as temperatures in those locations have been just a bit colder than guidance the last couple nights. However, think that the coverage and possibility of any low clouds, which would hamper cooling, are low enough to keep the cooler than guidance temperatures.
424 AM EDT WED JUN 8 2016 A cold front will cross the state early this morning.
324 AM CDT WED JUN 8 2016 An upper ridge building over the center of the country will result in very warm and increasingly humid weather over the next few days.