Aikyam-Lab/Synoptic-Bench huggingface dataset:
High pressure ridge centered over the eastern Great lake states will continue to build southward as its center moves east into the New England states tonight. The pressure gradient does tighten a bit over the region as this low center strengthens but we should only see some increased winds Sunday. Nearby developing low pressure will keep tight gradient and resulting gusty winds over the area.
A separate developing low pressure system will move off the Georgia coast/South Atlantic Bight, combining with the nose of high pressure down the Appalachians to produce a tight pressure gradient over the state. Have also kept slight chance pops near the developing low pressure area, over far east central Georgia/southeast CWA.
108 AM EDT Sun Aug 27 2017 High pressure over Ontario will move eastward to the New England States on Sunday.
PVA will provide upper support as the upper trough over nrn MN slowly digs sewd. The low levels show an inverted trough axis.
313 AM MDT Sun Aug 27 2017 High pressure is firmly in control over the Intermountain West and will continue to expand with heights rising over the next 24 to 36 hours. It will be difficult to budge this high without a major shift in the pattern.
334 AM MDT Sun Aug 27 2017 An upper level ridge will be centered over UT today and tonight. The NAM, HRRR and GFS show isold pcpn in the afternoon hours, over and near the higher terrain, with dry conditions over the southeast plains.
623 AM EDT Sun Aug 27 2017 Low pressure over Western Great Lakes will help sustain mid clouds (around 10 kft) through tonight over southeast Michigan. Chances for showers will gradually increase as the low levels begin to saturate, with showers likely on Monday.
300 AM PDT Sun Aug 27 2017 A very hot weather pattern is expected across the Mojave Desert Region much of the coming week as high pressure strengthens and holds over southern Nevada. Limited moisture trapped underneath the area of high pressure will lead to a slight chance of showers or thunderstorms over the mountains of southern Nevada and northwest Arizona each afternoon.
1240 AM CDT Sun Aug 27 2017 Upper low in western MN with lead short wave moving across MN/WI now with bulk of precip in eastern MN into WI. The low clouds and drizzle will certainly affect western Wisconsin this evening. A few more showers are in central MN associated with the upper low. While the short wave is moving along, the upper low is slower and looks to intensify a bit tomorrow as another jet streak arrives in northern stream. Mid/upper ridging over the western CONUS builds toward the central CONUS during the first half of the upcoming week, and then retreats back southwest during the last half as a strong trough dives across northern Manitoba/Ontario and our flow locally becomes more zonal.
102 AM EDT Sun Aug 27 2017 High pressure over southeastern Canada will bring fair weather and a chilly northerly flow through the remainder of the weekend. The high will shift to New England on Monday with continued fair weather and slightly warmer air. Very quiet short term period as high pressure is in control across the Northeast. High pressure will continue to build east the next few days. temperatures will start to moderate to near normal as we get into warmer air. Highs generally in the lower to mid 70s Sunday and Monday.
337 AM CDT Sun Aug 27 2017 Additional light rain showers today across the Northland as an area of low pressure exits the region, then high pressure builds in towards Monday. High pressure builds in towards Monday leading to decreasing clouds and warmer temperatures.
Multiple outflow boundaries are present across the Lower Rio Grande Valley this evening and have caused winds to become north to northeasterly.
A ridge of high pressure will hold strong over the western United States, with a northwest wind flow aloft east of the Rockies.
The latest 18Z surface analysis shows the cold front draped across central GA, southeast AL and southern MS. Widespread cloud cover will keep temperatures elevated overnight, with locals south and east of the front remaining in the low to mid 60s. Mid-level moisture is expected to increase along with forcing as the associated upper level low approaches the region from the west tonight.
Cold front still on track to bring the potential for some snow showers to the area later tonight into Thursday morning. Gusty northwest winds and cold advection kick in for Thursday in the wake of the cold front. Some MVFR cigs are possible later tonight into Thursday with the cold front and invasion of the low level thermal trough. Small craft advisory looks in good shape for later tonight into Thursday night as potent cold air advection regime sets up in the wake of departed cold front. Southwest winds increasing today and into Wednesday evening ahead of an approaching cold front. Clouds will increase tonight ahead and near the cold front, possibly becoming MVFR along with light snow north of Madison and Milwaukee.
Low MVFR cloud deck will persist across the region in the wake of a cold front that passed earlier this morning.
These upper features should link up and move across the Lower Mississippi River Valley through Thursday morning. Deep moisture will overrun a cooler drier airmass now entrenched over portions of the Mid South tonight. High pressure will build in behind the departing storm system on Thursday. Dry and mild weather can be expected ahead of a reinforcing dry cold front Thursday night.
302 PM EST Wed Nov 8 2017 Currently - A narrow ridge extends across Florida, while a broad area of low pressure is located in the Caribbean. Forecast - Over the next few days, a high pressure system will march across the eastern United States. This high pressure system will linger over the eastern united states through the weekend and into the following, then get reinforced by another high diving southeastwards across the Plains. Over the next several days, high pressure will move eastwards into the eastern United States, resulting in freshening northeast to east breezes across Keys waters.
With the recent rainfall, residual moisture in the lower levels and winds becoming light, patchy fog development will be possible for several hours after clearing occurs. Low temperatures early Thursday morning are expected to be near or just below the freezing mark in our far northern and northwestern counties, where better radiational cooling occurs. Overnight lows are expected to be in the lower to mid 30s farther south across much of our area, to the upper 30s in our far southeastern counties.
222 PM CST Wed Nov 8 2017 First band of snow continues to sag southward through the FA, but so far has been along and north of the highway 2 corridor. With the colder air and clearing skies moving over the warmer large lakes in the FA, also expect more lake effect streamers to occur throughout the tonight and Thursday time frame.
This due to 1031 mb high pressure over ne KS and nw MO and ridging over nw IL that will settle into central IL by this evening. Cool temperatures in the low to mid 40s over central IL and upper 40s in southeast IL, will climb to upper 40s by mid afternoon over central IL and lower 50s in southeast IL. High pressure dominating the Midwest early this morning, with mostly clear skies and temperatures dropping into the low thirties. Tonight expected to be around freezing for much of the state. Winds become lighter under the ridge axis with a small amount of variability.
258 PM MST Wed Nov 8 2017 Temperatures will drop into the single digits and teens tonight across North-central Montana behind a stable cold front. Warmer air moves in from the southwest on Thursday, creating areas of mixed precipitation.
248 PM MST Wed Nov 8 2017 Current surface analysis shows cold front stretching east to west across far southern SD and northern WY. Upper level analysis shows weak ridging over the Rockies, with west-northwest flow across the Northern Plains. Cold front will push south of the forecast area by early evening, with colder conditions expected through Thursday. Lows tonight will mostly be in the teens, with highs on Thursday ranging from the low to mid 20s across far northwest SD to the upper 30s over parts of northeast WY.
It'll be "clear sailing" the rest of the week, as broad mid-upper deck ridge spreads east from the Northern & Central Rockies across the Northern Plains. Although temps will still be below normal, there will be somewhat warmer weather for all areas during these periods. /Canadian border will push the lower-deck trof axis east that should cross KS Sat afternoon & evening. The warming trend continues Sat & Sun before the next "cold front" arrives. Winds will then switch back around to the north as a cold front drops southward during the day on Thursday.
Water vapor imagery is showing an upper low near St. With the cold start tomorrow and cold front moving through, kept highs below normal on Thursday.
123 PM CST Wed Nov 8 2017 Clouds will continue to invade from the northwest, behind a cold front that is sinking across southern portions of SD. Cooler air is beginning to sink in from the northwest.
Depending on how fast skies clear, low temperatures tonight could be cooler if skies clear earlier, or hold a bit warmer if clouds stick around. Temperatures will remain on the cool side as northwest flow aloft keeps cooler temps over the region.
This due to 1031 mb high pressure over ne KS and nw MO and ridging over nw IL that will settle into central IL by this evening. Cool temperatures in the low to mid 40s over central IL and upper 40s in southeast IL, will climb to upper 40s by mid afternoon over central IL and lower 50s in southeast IL. High pressure dominating the Midwest early this morning, with mostly clear skies and temperatures dropping into the lower 30s. Tonight expected to be around freezing for much of the state. Winds become lighter under the ridge axis with a small amount of variability.
High pressure over Indiana in the short term will be replaced by a cold front Thursday.
A slightly drier day as South Florida remains under the influence of deep layered high pressure.
With light winds and mostly clear skies, temperatures will fall into the low to mid 30s for many locations. A cold front will move into the region tomorrow evening, but the bulk of the cold air behind the front won't affect the area until late tomorrow night.
Eventually though, this does occur, and tonight will be a cooler night as a result, with temps dropping into the lower half of the 30s.
1123 AM MST Wed Nov 8 2017 18Z TAF CYCLE Low clouds and fog will continue to lift and dissipate through 20Z in the wake of an exiting upper level trough. Temperatures will be cool today over the eastern plains as highs only top out in the low 50s.
303 PM CST Wed Nov 8 2017 Tonight through Thursday: Latest Rap and Satellite imagery showed flat ridging through the atmosphere.
1045 AM MST Wed Nov 8 2017 Current upper air analysis shows a short wave trough over the Central Plains. West of the short wave trough a ridge was slowly building in. Radar imagery shows the light snow is gradually ending/moving southeast ahead of the short wave trough. Warm air advection will allow highs to be warmer than yesterday. Winds will be light due to a high pressure at 850 mb overhead, although the pressure gradient will be tight enough to cause winds to gust 15-20 MPH. After midnight a cold front will move in, turning the winds to the north.
1114 AM EST Wed Nov 8 2017 High pressure will build into the region through Thursday. A strong cold front will drop south across New England Thursday night.
Will see warm advection return to the area for tonight through most of the daytime hours on Thu, at least for the southern half of KS, with low temperatures a little warmer overnight. This will probably lead to slightly cooler temps for central KS on Thu, but some compressional heating south of the boundary will lead to max temps similar to today for most of southern KS. The warm advection will also increase the low/mid level moisture, which will increase cloud cover on Sat, which will temper the warmup somewhat. Winds will then switch back around to the north as a cold front drops southward during the day on Thursday.
Expect conditions to gradually diminish later this afternoon/this evening, as a cold front moves near the area. Cold front will slide through the area today. While good moisture will be present in the low and high levels, the mid levels will not be as such. The better forcing will remain north of the area today so rain chances today will be on the low side (20-30% mainly north of the FL panhandle). Cooler temperatures across SE AL and SW GA where more clouds and possible showers will be located.
1112 AM EST Wed Nov 8 2017 A wedge of high pressure will remain in place through Thursday bringing low clouds and cooler temperatures to the area.
Skies should be clear by later this evening just in time for surface ridging to settle over the region. This should allow for enough radiational cooling to take place to lower temps to freezing or below by sunrise.
213 PM EST Wed Nov 8 2017 Low pressure tracks across southern areas this morning. Strong cold front late Thursday/Thursday night.
An improvement in flight conditions is expected thru the period as high pressure builds into the region. The high PoPs down near the Red River still look on track, as a nice low- mid level frontogenetic band has set up over northern TX, and some of this precip will bleed up into far southern OK thru the day. with the highest rain chances remaining across the southern half of the forecast area. Broad surface ridging will build across the region in the wake of the exiting system. with warmer afternoon temps (although still remaining below average).
Rain along the coast this morning will spread inland this afternoon and evening as a slow moving cold front moves into the area.
1241 PM EST Wed Nov 8 2017 High pressure will provide dry weather and below normal temperatures through Thursday. High pressure will provide sunny skies and dry weather for most locations today. Stratus to the southeast of Pittsburgh will slowly break through the day as the low levels start to mix out. A strong cold front will quickly drive through the area Thursday evening, reaching my southern counties shortly after midnight. Additionally, any large scale ascension stays well north of the region in close proximity to the large Hudson Bay upper low.
Still expecting temperatures to increase a few more degrees, into the 30s to low 40s with the highest readings southwest. A cold front is still on track to drop south into the northern CWA later this afternoon.
1028 mb high pressure over central KS, northern MO and nw IL was providing the fair weather with lighter winds today. High pressure ridge to settle over CWA during this evening with ridge axis reaching near the Ohio river by sunrise Thu. Meanwhile a cold front over central parts of MN/SD/WY will sweep se toward NW IL by sunrise Thu. Light winds and fair skies this evening will allow temps to drop fairly quickly and sided toward the cooler subfreezing lows tonight of 28-32F. Cold front to sweep se across central IL during Thu morning and through southeast IL Thu afternoon and will pass through dry as moisture and lift is limited. Gusty nw winds develop behind the cold front and to start to bring in colder air.
In the wake of the cold front isentropic lift was providing some fast moving light showers tracking east across the region. Highs will be from the lower 50s northwest to the lower to middle 60s southeast. Prior discussion below: Today and tonight: The slow moving cold front that passed south through most of the region yesterday and through the evening is now just starting to clear through the Pine Belt and will be heading toward the coast through the day.
Potential for Light Freezing Rain on Thursday. A weak disturbance moving through the ridge has been interacted with an easterly push of colder air today which is causing light steady snow across northwest Montana. A warm front is still expected to move into the Northern Rockies late tonight through Thursday. One of the biggest concerns is the threat of freezing rain developing in a few of the valleys of Northern Rockies. The highest confidence of valleys experiencing freezing rain are across extreme northwest Montana. The remainder of the valleys could receive a brief period of freezing rain but confidence is low on how much and on the timing. Snow levels will be steadily increasing throughout the day, but the higher terrain will remain snow.
Changes will come this evening and overnight as a cold front, currently roughly oriented SW to NE from Pierre, SD to Duluth, MN, moves into and across the state. Soundings and top-down approach to P-type suggest light freezing rain could be possible if enough saturation depth is achieved, but with only around 1-1.
330 PM CST Wed Nov 8 2017 A strong cold front will move through the region tonight and bring the coldest air of the season to Minnesota and Wisconsin. Early afternoon satellite imagery showed a broad upper level trough over central Canada with subsidence and northwest flow over the high Canadian prairies.
and will be replaced by a ridge of high pressure. Roads could be slick early in the morning over elevated surfaces where the temps will be near freezing. Zonal flow will develop over the southern tier of states with a ridge centered over Baja California. The ridge will move slowly east through the rest of the week and into the weekend.
Milder, moist west to southwest flow will continue to override a cooler resident airmass trapped in the Great Valley on down valley surface flow. The rain would be produced by the arrival of another upper trough. The trough will gradually slip east across the Appalachian rise later in the day Thursday allowing for improvement in flight condition to mvfr category.
This ridge is forecasted to drift southward as a front approaches from the northwest. Given the combination of temperatures and wind speeds the wind chills around sunrise could drop into the the lower teens and upper single digits.
Falling temperatures under overcast skies will continue this afternoon into tonight in the wake of the cold front that passed early this morning. Drying will then occur from the northwest towards the coast early Thursday as upper level ridging builds overhead, with only a lingering slight chance for showers over the water Thursday night. A low, thick cloud deck will remain over the region tonight, and temperatures should drop a bit further into the lower 50s across most of the region overnight. Thursday temperatures will remain cool under mostly cloudy skies, with highs in the low to mid 60s. Temperatures overnight tomorrow night will be only a few degrees warmer, with lows still in the low to mid 50s.
A jet streak on the southwestern corner of the low was moving southeast across North Dakota this afternoon, enhancing an area of light snow that expanded out of south central Canada and continued to expand southward across North Dakota. Meanwhile at the surface, Arctic high pressure was centered over southern Alberta/Saskatchewan, and pushing into the Dakotas with northerly surface winds. The high should move east into the Red River Valley by Thursday evening. to the lower 20s in southwestern ND.
High pressure will remain centered over Mexico, while a series of progressive low pressure systems is situated well to the north.
This low level moisture will continue to shift slowly sewd as sfc/upper level ridging influences build across mid state with all low level moisture pushing sewd of mid state by 09/15Z.
1130 AM MST Wed Nov 8 2017 Updated fcst mainly to account for clouds and cooler temps in the greater COS/PUB areas. This area has been slow to clear out and will likely remain cooler than previously forecasted. Upper trough swinging southeastward through Colorado early this morning, with back edge of snowfall dropping south of the Arkansas River as of 1030z. Fairly substantial warming aloft then develops this afternoon and overnight as flat upper ridge builds over the srn Rockies, leading to max temps well above freezing across most of the region by late day.
A cold front continues to push southward across our region this afternoon, and was located roughly along a line from just south of Gulf Shores, to near Pensacola Bay to between Crestview and Destin as of 3 PM CST. Rain will quickly come to an end by Thursday afternoon as a much drier airmass spreads in behind the departing trough. Highs Thursday are only expected to reach into the lower to mid 60s inland and the upper 60s along the coast.
425 PM EST Wed Nov 8 2017 Issued 425 PM EST Wed Nov 8 2017 Clouds will increase late tonight into Thursday as a strong cold front approaches.
234 PM EST Wed Nov 8 2017 A ridge of high pressure will keep us dry through Thursday.
Temperatures ranged from the low 80s to the mid 90s. At the surface, a low pressure is located over eastern New Mexico and eastern Colorado. A cold front is located along the Colorado/Wyoming border and a prefrontal trough is located just north of Interstate 70. For this afternoon and evening, a cold front will move through from the northwest. This highlights that any storms that do develop could be strong/severe with damaging winds as the primary threat. Once the cold front passes this evening, gusty winds should be initially anticipated. However, as high pressure builds in over the High Plains, winds will dramatically weaken. In fact, due to the high pressure, citizens across the High Plains can expect a beautiful day tomorrow with sunny skies, light winds, and afternoon high temperatures in the upper 70s to low 80s.
This is as a strong cold front continues to dive south and should be along the I-90 corridor by mid evening. Further aloft, a jet streak will round the base of an overall trough. This is before a high pressure ridge and subsidence should erode this. High temperatures will be stuck in the 20s for most of the area with locations closer to Sioux City struggling to reach the freezing mark. Thursday night low temperatures are tricky as there is still some question on how much the high level cloud cover could slow down cooling.
Morning satellite pics showing a broad cloud shield over the Pac NW, well in advance of a deep upper level low off the WA coast. Will see isolated showers develop this afternoon across southeast Oregon as the low edges closer to the coast. A weak upper level ridge over our area this morning will shift east this afternoon and tonight, to be replaced by warmer and increasingly moist southwest flow aloft associated with an upper level trough centered off the Washington/Oregon coast.
This is due to an anchored area of high pressure as the southern axis extend south along the lee side of the Appalachian Range. However, some clearing may creep into the Bluegrass with low temps tonight plummeting into the low 30s. High pressure will then begin to settle into the area with the colder part of the incoming air mass beginning to settle into the area. For eastern Kentucky, high pressure will remain in control through the first half of the weekend.
we started out with mostly sunny skies and temps in the low to mid 70s. cruising twrds the low to mid 80s. A cold front has move through all the terminals with northerly surface winds now being reported at all sites. This morning's surface analysis indicate a surface cold front extending from SW Mississippi through Acadiana and out over the northern Gulf of Mexico. This will in temperatures being much cooler than they have been in the past week.
It is even possible to see freezing fog at KMAF and KHOB late tonight. It will be a cold rain thanks to a cold front which has passed south and west of the Rio Grande with most areas seeing high temperatures this afternoon 15-30 degrees cooler than yesterday. Therefore, a few locations could see low temperatures near freezing Thursday morning. The amount of rain received in any given location may work against temperatures dropping readily though since surface dewpoints will be above freezing.