Aikyam-Lab/Synoptic-Bench huggingface dataset:
233 PM EST Thu Feb 16 2017 High pressure centered along the Louisiana Gulf Coast is ridging across our region this hour, making for somewhat variable winds. This flow, combined with ridging building in aloft, will make for a nice mid February warmup. Cloud cover tonight, again in the Bluegrass, into the morning hours should help us start off warmer compared to this morning.
221 PM EST Thu Feb 16 2017 Skies will begin to clear Friday as low pressure moves northeastward.
Upper ridging will continue to sit across the central CONUS with a thermal ridge also centered across the region. HRRR is showing highs reaching the lower 70s especially across the northern/eastern foothills and surrounding plains. This will bring breezy NW winds to the area and cooler highs in the 50s. Upper ridging with mild and dry weather will continue through the weekend.
/Issued 225 AM CST Thu Feb 16 2017/ Upper level low over northwest Mexico early this morning is expected to lift northeast through West Texas early Friday morning and then into Oklahoma by Friday evening. It appears that this low will be moisture starved for our area with most of the precipitation falling near the Gulf Coast. Our eyes will then focus on the next upper level trough which will be very near the west coast of the U.
1125 AM CST Thu Feb 16 2017 High pressure continues over the area with clear skies. Moisture levels will increase more significantly for Fri as an upper level closed low lifts NE into the region. rain chances do return to the forecast for Fri night as the upper closed low moves over AR.
259 PM EST Thu Feb 16 2017 Low pressure departing eastward from the Canadian Maritimes will result in decreasing snow shower and flurry activity across northern New York and Vermont this afternoon and evening with partial clearing. Slow-moving, deep low pressure across Nova Scotia is gradually losing its influence on North Country weather conditions this afternoon. This may allow an additional 1-2" snowfall for the higher summits from Jay Peak to Mt. With the low-mid level drying from the north, and per visible imagery, should see some sunny breaks thru the next several hours, especially across nrn NY into wrn VT. Generally looking for overnight low temperatures in the low-mid teens. Will see a narrow ridge of high pressure building across the region from west to east Friday into Friday night, with generally dry weather conditions.
Today will signal the beginning of the advertised warming trend with temperatures soaring into the low to mid 40s across much of the area (possibly 50+ far southeastern North Dakota).
This trend is expected to continue until the cold front crosses tomorrow. Scattered mountain snow showers will diminish during the Friday morning hours under a weak ridge. A trough off the west coast will usher in periods of moist air to the Northern Rockies.
Little change with clear skies and light northwest flow as high pressure moves in. Upper ridging to move in late this week bringing more dry weather the next several days with warmer temps into the 50s and 60s for highs this weekend. Most locations should be within 3 degrees though NE sections of forecast area may tend 3+ degrees cooler if BL mixing is a bit delayed. mostly sunny to sunny with some passing high clouds and significantly warmer by 10 degrees NE to 20 degrees SW. Expecting highs in the mid/upper 40s far northeast into the lower 60s in the southwest 1/3 of the forecast area.
300 PM MST Thu Feb 16 2017 Afternoon water vapor loop depicted a high amplitude upper ridge over the northern Rockies and high plains. The high temperature thus far at Cheyenne has been 69, only two degrees shy of the month's all-time record high set in 1962. 12Z/18Z short range model guidance is in good agreement progging the upper ridge to shift east across the north/central Great Plains and Midwest through Friday. This trough will keep the pressure gradient fairly tight across portions of southeast WY tonight, especially between Cheyenne and Wheatland. Friday will be cooler as a weak Pacific cold front passes through. Models continue to bring advect some Pacific moisture into southern WY late Friday, with light orographic precipitation, mainly in the form of snow for the higher elevations of Carbon County.
348 PM CST Thu Feb 16 2017 Now through the day Friday: Highly confluent flow aloft is keeping clouds at bay across the region today, despite a cut-off upper low over Texas and Old Mexico (which is about to get kicked out to the east). Lows tonight will be at seasonably chilly values although none one in the region (even the typically-cooler eastern MS spots) is expected to dip down to freezing. /BB/ Showers will begin to spread into the region from the south on Friday night as southerly flow increases, moistening the lower and mid levels, in response to a deep closed low crossing the southern Plains.
This wind shift and warmer air aloft will effectively end any lake effect potential for all areas of the U. ridging builds back into the area. In the extended, GFS and ECMWF show a 500 mb ridge over the central U. This ridge amplifies as it moves into the upper Great Lakes 12z Mon. The warm air associated with the ridge gets pushed further south with time as colder air makes a return to the area on Thu. We are on the southern edge of the colder airmass as a cold front moves through on Wed. Late Tue night and early Wed morning, looks like there could be a little freezing rain possibility with temperatures slightly below freezing. But later tngt, an upslope sse wind off Lk MI wl probably bring some lo clds to SAW as the aprchg warm frontal invrn lowers.
Currently, an upper level ridge axis was moving eastward into the western Dakotas with warm air well established off the surface. This very mild air is forecast to remain over our area today as the apex of the upper level ridge moves over the state this afternoon.
221 PM EST Thu Feb 16 2017 Upper heights will build steadily through Friday as mean upper trough over the northeast CONUS shifts east as deep low pressure system lifts into the Canadian maritime. The progression of the upper trough will allow upper ridging to translate eastward over the area during the next 24-36 hours. Southeast flow will then veer to south on Friday as a warm front lifts north into the area coincident with the building upper ridge.
246 PM MST Thu Feb 16 2017 High pressure drifting eastward over the Desert Southwest will bring dry conditions and above-normal temperatures through Friday.
Winds have turned out of the southwest in the wake of the ridge, and the RAP and NAM show that this trend will continue through tonight. Skies will be mostly clear through tonight as a upper ridge builds into Missouri and Illinois from the west. RAP forecast soundings are showing mixing into the 900-850mb range which favors highs this afternoon at or above the warmer NAM MOS temperatures.
1158 AM CST Thu Feb 16 2017 High pressure over southern Mississippi is keeping our skies clear today. (ISSUED 1125 AM CST Thu Feb 16 2017 ) High pressure continues over the area with clear skies. Moisture levels will increase more significantly for Fri as an upper level closed low lifts NE into the region. rain chances do return to the forecast for Fri night as the upper closed low moves over AR.
349 PM CST Thu Feb 16 2017 (Tonight and Friday) An upper level low that is currently located over northern Mexico will swing across West Central Texas overnight. Overnight low temperatures will be in the low to mid 40s. Above normal temperatures are forecast on Friday, with highs in the low to mid 70s, along with gusty winds of 10 to 20 mph.
However, a second vort max/short wave trough is expected to provide additional ascent tonight--primarily across southeast Oklahoma.
Otherwise, a weak 500 mb ridge overhead will allow drier weather to prevail across the region today. High temperatures today will be in the low to mid 80s with a mix of sun and clouds. Low temperatures tonight will range from the mid 60s across the ranchlands to the lower 70s near the coast. A pre-frontal trough will move across Deep South Texas and the Rio Grande Valley Monday afternoon.
The 7 am regional surface analysis showed a 1027 mb high pressure system centered over NC.
Localized restrictions to visibility are expected, as well as some slick spots on bridges where the fog is dense, but current forecast products seem to have a decent handle on the extent of it. Primary impact with air temps dipping into the 20s, but ground temps remaining much warmer, will be the potential for slick spots on bridges in fog areas. More sunshine and the departure of the low- level thermal trof will allow highs to climb a few degrees above seasonal normals. Upper trof over the Plains will continue to deepen, with a closed low aloft developing over the Dakotas tonight.
This system will be coming from the northwest out of the Gulf of Alaska, and will a bit cooler than the most recent system. This low will tighten pressure gradients across central and north-central Oregon, and the Blue Mountain Foothills tonight into Monday morning.
1018 AM EST Sun Nov 27 2016 Fair weather will accompany the arrival of high pressure later today and last through Monday.
Issued an anticipated small craft advisory for the Gulf waters from this evening through Monday day as south winds increase due to the tighter gradient arising from Gulf high pressure interacting with a deepening plains storm system. Winds will decrease Monday afternoon with the approach of a weak cold front, but elevated seas will continue into Monday evening. Otherwise, a weak 500 mb ridge overhead will allow drier weather to prevail across the region today. High temperatures today will be in the low to mid 80s with a mix of sun and clouds. Low temperatures tonight will range from the mid 60s across the ranchlands to the lower 70s near the coast. A pre-frontal trough will move across Deep South Texas and the Rio Grande Valley Monday afternoon.
Low level thicknesses and 850 temps change very little today but the boundary layer winds will swing from a northerly component to a southeast wind as the high pressure drifts east. Expect temperatures this afternoon very close to yesterday if not a degree or so warmer.
As a splitting trough begins to work in, much of the area will have a quiet day with temperatures getting to near 50 this afternoon. As the southern branch of the trough begins to wrap up into a cut off low over South Dakota, winds will begin to shift to the west and northwest this afternoon and evening.
Water vapor loop indicated upper level trough was located over northern AZ with an upper jet digging a secondary trough off the CA coast.
Cooler temperatures today, then a fast moving storm system will bring a good chance of valley rain and mountain snow mainly tonight, followed by colder temperatures Monday.
Once fog dissipates later this morning, attention turns to the strong Eastern Pacific trough now moving into the intermountain west. A lee surface cyclone will develop across northeast CO by 18Z today in response to this wave and then lift to near the Dakotas/MN border region by 12Z Monday. Then expect a band of rain showers to move quickly northward late this afternoon into the evening along the mid-level warm front. Then, re-development of showers/isolated thunderstorms are possible Monday afternoon, especially east of the MS River, as the cold front swings across the region. Prior to the cold frontal passage, expect a very warm day with 925 hPa temperatures peaking between +7 and +10 Celsius, resulting in afternoon highs well into the 50s for most areas.
333 AM MST Sun Nov 27 2016 The lead wave in the upper trough rotating through the Rockies today lifts across the northern plains while another wave in the series phases into the south end of the trough and sweeps east of the Rockies tonight and across the southern plains on Monday. Additional energy diving into the back side of the trough on Monday creates a large low pressure area that stalls over the north central U.
Some patchy freezing fog was also occurring in some of these areas. Ahead of the trough axis. areas across the SRN/SERN portion of AR in close proximity to the higher moisture axis. will also be the region where the low level SRH values are forecast to be highest. if any storm were to become SFC based in this region of overlap between the higher moisture and high 0-1 km SRH (forecast values of several hundred m2/s2).
Primary impact with air temps dipping into the 20s, but ground temps remaining much warmer, will be the potential for slick spots on bridges in fog areas. More sunshine and the departure of the low- level thermal trof will allow highs to climb a few degrees above seasonal normals. Upper trof over the Plains will continue to deepen, with a closed low aloft developing over the Dakotas tonight.
00Z sounding data sampled 145kts of 300 mb wind over Las Vegas as the trough approached. Southerly winds will increase today in eastern Oklahoma and northwest Arkansas in advance of the deepening low and attendant cold front. The showers and storms will shift quickly east with the cold front on Monday morning and be exiting our forecast area just afternoon.
1042 AM EST Sun Nov 27 2016 A departing area of high pressure will bring sunny skies to the region today. An intensifying low pressure area will bring advancing rain showers, with the chance of rain increasing from west to east through the day on Monday, and especially Monday night.
428 AM MST Sun Nov 27 2016 Current surface map places elongated area of low pressure from southern Montana into eastern Colorado. Upper level trof is moving into the central Rockies. Upper trof moves into the central/northern plains this afternoon with 700-500mb low closing off over central/eastern South Dakota this evening. Monday/Monday night Trowal develops on back side of upper low, with snow wrapping back into northeast Wyoming/western South Dakota.
A strong low pressure system will bring widespread rain to the area beginning early Monday morning and continuing through Monday night.
631 AM EST Sun Nov 27 2016 Cool high pressure builds into the region through today. Winds are slow to become S on Mon as hi pres sfc/upper ridge aloft are slow to move off the coast. The associated sfc cold front slides east across the MS Valley Mon and Mon night. Cooler temps as well for Fri/Sat with highs only in the low/mid 50s. Complex lo pres and its associated cold front approaches the region from the W Mon and Mon night. The high moves offshore Mon, with southerly flow developing over the local waters as a strong low pressure system approaches from the west. Sca conditions forecasted for Tue over at least the Bay/coastal waters ahead of the next cold front as southerly flow strengthens and seas reach 7 ft over northern coastal wtrs.
1026 AM EST Sun Nov 27 2016 A pressure ridge will extend through the forecast area through tonight. The ridge will be off the coast Monday. Moisture will increase in the southerly flow on the backside of the offshore high and ahead of an approaching weakening cold front.
A storm system will bring a cold front and snow to the state today with the heaviest snowfall of 2 to 6 inches possible across northwestern Nye and southern Lander and Eureka counties.
717 AM EST Sun Nov 27 2016 A cold front moving south across the area is generating showers and a few thunderstorms over the nearshore Atlantic coastal waters and along some coastal locations. As this front pushes south today, the overall flow pattern will begin to shift to the northeast, ushering in slightly drier and cooler air. On Monday, as high pressure builds to the north of region, winds will continue to shift to the east/southeast and become breezy at times.
955 AM EST Sun Nov 27 2016 Hi pres ridge over the Deep South/Mid Atlc has pushed a cold front into south FL.
This low will continue to deepen and move northeastward across Nebraska today, which will tighten pressure gradient and as a result increase surface winds. Still, trends will be watched, especially the low level moisture quality. The highest rainfall amounts will likely occur across south central Missouri.
This afternoon an upper level low over the western U.
High pressure and warmer air will move over the region.
A cold front will move through the area late this evening into Monday morning. Isolated to scattered showers and thunderstorms will be possible today as an upper level trough begins to approach from the west. A Pacific cold front will move across the area late tonight and into Monday morning.
Onshore flow will steadily increase today in response to the deepening low pressure system over the central plains as the upper trough over the Great Basin this morning moves through the Rockies today. Secondary short wave trough moves across New Mexico tonight and across North Texas on Monday.
Temperatures across northern Iowa have fallen to the mid 20s, leading to freezing fog. With no apparati to lead to notable temp increases before sunrise, expect freezing fog to remain a hazard through sunrise as temperatures to remain below freezing. With the low well to our west, we are able to tap into sufficient gulf moisture for precip via a 45kt LLJ. Soundings are very well-saturated in the low levels, suggesting a very cloudy day at the very least.
939 AM EST Sun Nov 27 2016 A decaying and weak cold front is drifting south over the Florida Straits this morning. A large area of high pressure is moving eastward toward the mid Atlantic Coast today, and dry air is pushing southward over the Florida Keys this morning.
Deep layer ridging will move eastward across the southeast through the day, keeping our local area dry.
Low cigs will return again from W to E beginning after sunset, with VCSH possible during the overnight hours at E TX terminals ahead of an approaching cold front.
402 AM CST Sun Nov 27 2016 Water vapor loop indicated upper level trough was located over northern AZ with an upper jet digging a secondary trough off the CA coast.
952 AM EST Sun Nov 27 2016 Marine A ridge of high pressure pushes east of Michigan today. A warm front will lift northward through the region later tonight into Monday.
This feature will translate eastward across Colorado and kick an upper level trough across northern Colorado by 18z today. Across the northeast plains there will be enough moisture, lift and instability around with the passage of the trough to warrant at a slight chance of showers mainly in the morning. Late this afternoon and evening, weakening QG ascent in the high country will be replaced by better cold air advection and an improved orographic component as the ridgetop winds will be west/northwesterly.
Issued by National Weather Service La Crosse WI 547 AM CST Sun Nov 27 2016 06Z surface data has high pressure over the Ohio Valley with a developing storm system in southeast Colorado.
A few rumbles of thunder are perhaps possible this afternoon when slightly cooler air filters in aloft and steepens midlevel lapse rates just a shade, but even the isolated T mention in the grids was a bit of a stretch. Light rain chances do linger across our far eastern CWA on Monday where precipitation could redevelop just ahead of the surface cold front, but it is more likely that this will occur east of the CWA, especially with widespread stratus preventing any instability from developing ahead of the front. During the midweek period, a secondary wave will dig down the back side of the longwave trough sitting over the western U. , which will act to broaden and slow the eastward progress of the upper trough.
Local observations are also showing wind gusts of 50 mph at the highest elevations across the CWA. This snow will lighten shortly after midnight though showers will continue for the highest terrain.
Cooler temperatures today, then a fast moving storm system will bring a good chance of valley rain and mountain snow mainly tonight, with continued cool temperatures Monday.
Upper trough and cold front will move through SE Oregon and SW Idaho today. Therefore, the forecast will be adjusted accordingly with only scattered showers expected in the higher terrain and isolated showers expected in the valleys. The showers will decrease in the afternoon as the upper trough and front move rapidly to our east. A second and more potent upper trough and front will move through the region late tonight through Monday.
447 AM MST Sun Nov 27 2016 The lead wave in the upper trough rotating through the Rockies today lifts across the northern plains while another wave in the series phases into the south end of the trough and sweeps east of the Rockies tonight and across the southern plains on Monday. Additional energy diving into the back side of the trough on Monday creates a large low pressure area that stalls over the north central U.
Warm advection in the low levels should produce high temperatures around 10 degrees above normal.
650 AM EST Sun Nov 27 2016 High pressure will bring sunny skies to the region today. A low pressure area will draw moisture to the Ohio Valley Monday, producing widespread rain showers Monday night.
926 AM EST Sun Nov 27 2016 Latest water vapor imagery and upper air analysis shows a northwest flow aloft over the state as the area resides between troughing to our east and a building ridge over the central part of the country. At the surface, high pressure is over the southeast, with a northeast wind flow across forecast area. For the rest of today, the upper ridge will continue to build eastward in response to a deepening trough to its west. With stacked ridging in place, no rain is in the forecast and the rest of the day will feature mostly sunny skies with highs topping out a couple of degrees above normal. High pressure over the southeast will shift eastward over the next couple of days as a cold front approaches the southeast.
611 AM EST Sun Nov 27 2016 High pressure will allow for clearing through today. Periods of rain with several waves of low pressure early and mid week. High pressure is nudging into the region this morning. Skies will completely clear by this afternoon, but this will be short lived as mid and upper level clouds will increase with warm air advection out ahead of an approaching warm front. One last day on Monday of dry and warm weather under high pressure before a series of amplified upper troughs and frontal systems bring a very wet and quite mild pattern, with well above normal temperatures.
Colder air on the back side of the low may cause rain to mix with some snow in whatever precip is left by dawn on Monday morning.
Winds will also increase after 00Z as the surface pressure gradient strengthens considerably ahead of an approaching cold front.
752 AM EST Sun Nov 27 2016 Sunshine returns today as high pressure and warmer air moves over the region.
Went ahead and upgraded the High Wind Watch for the Laramie Valley, Cheyenne, and eastern Platte county zones. Office blowing snow model is showing the highest probs in the Arlington area due to the very strong winds and higher snowfall amounts (2-4 inches).
The large upper level trough across the western U. 35-45 kt low level jet and theta-e ridge will develop up the I-35 corridor late this evening and shift east into the eastern counties by early Monday morning.
619 AM EST Sun Nov 27 2016 A pressure ridge will extend through the forecast area through tonight. The ridge will be off the coast Monday. Moisture will increase in the southerly flow on the backside of the offshore high and ahead of an approaching weakening cold front.
1059 AM EST Sun Nov 27 2016 High pressure will allow for clearing this morning. Periods of rain with several waves of low pressure early and mid week. High pressure is nudging into the region this morning. Skies will completely clear by this afternoon, but this will be short lived as mid and upper level clouds will increase with warm air advection out ahead of an approaching warm front. One last day on Monday of dry and warm weather under high pressure before a series of amplified upper troughs and frontal systems bring a very wet and quite mild pattern, with well above normal temperatures.