Aikyam-Lab/Synoptic-Bench huggingface dataset:
Arctic high pressure will slowly build toward the central Gulf Coast. Under the high, light and variable winds will be noted overnight. As the high departs, winds will become southwest at 6 to 12 mph Thursday, with a few gusts from 16 to 20 mph.
Warmer temperatures and low dew points/RH will help eat away at the snow and in many cases melt it all where the depth is shallow.
High pressure will move off to the east, allowing for return southerly flow, and "warmer" temps through the end of the work week.
Arctic high pressure centered over northern Louisiana early this morning. If we can deal with the cold for another 30 hours or so, we'll finally see temperatures remain above freezing.
427 AM EST Thu Jan 18 2018 A large are of high pressure centered over the Lower Mississippi Valley will ridge northeast across the Ohio River Valley and into the Mid Atlantic states today.
205 AM EST Thu Jan 18 2018 A weak ridge of high pressure will bring quiet and seasonable weather to the area today.
An upper level ridge will build into the region behind this system with much above normal temperatures expected. With limited snow cover, leaned toward warmer model guidance.
In addition, patchy freezing fog is possible per a few model visibility forecasts generally near the Republican river valley. Otherwise, broad upper level ridging will continue to move toward the area from the west ahead of a large upper trough. the main wx concern for the entire CWA continues to focus on the upper level trough that comes across the central Rockies.
Temps remain aoa freezing where the clouds are located. The cloud cover will likely retard heating and afternoon temps are trending a bit cooler. Should make the lower 40s and thats about it.
417 AM EST Thu Jan 18 2018 High pressure centered south of the region will extend up the western side of the Appalachians through the end of the week. Continued to forecast temperatures on the cooler side of guidance. Ridge of high pressure will extend from the Gulf Coast into the upper Ohio Valley through the period. However, still believe guidance is slightly too aggressive with warmer temperatures.
308 AM CST Thu Jan 18 2018 Another cold night across the Midsouth with skies clear under high pressure. bringing warmer air into northeast Arkansas this hour. Walnut Ridge is showing 8kts and a balmy 17F. The Midsouth being just to the north will see southwest winds of generally 5 to 15 mph and the start of warmer boundary layer air surging out of Texas. Temperatures will reach close to freezing today.
Arctic high pressure will settle over the Mid South tonight. High pressure was centered over the Ark-La-Tex region. The high will slide off to the east tonight keeping skies clear and temperatures will be quite cold again but not as cold as this morning with lows Wednesday morning from around 10 degrees to the mid teens. High pressure will remain south of the region Thursday keeping dry weather and below normal temperatures. Highs will be warmer than today with highs in the mid to upper 30s. The high will be moving east of the forecast area Thursday night allowing winds to become more southerly with milder air moving in.
340 AM EST Thu Jan 18 2018 Deep low pressure just off the coast today will lift quickly northeast. High pressure will build in from the west today through the weekend.
Overall, made only minor changes to the prev forecast, generally trending twd the cooler guidance. However, did trend warmer across srn portions of the CWA where forests have lower albedo. Tilly High pressure will be located over the Gulf Coast on Thursday night with a tight pressure gradient across Missouri and Illinois.
With the ridge in place and southwesterly winds we will see WAA increase through the night. Walsh High pressure will be located over the Gulf Coast on Thursday night with a tight pressure gradient across Missouri and Illinois.
In addition, patchy freezing fog is possible per a few model visibility forecasts generally near the Republican river valley. Otherwise, broad upper level ridging will continue to move toward the area from the west ahead of a large upper trough. An upper level trough expected to move ashore the CA coast Fri night is progged to amplify as it tracks toward the 4-Corners region on Sat. As the upper wave approaches from the west, a lee cyclone will deepen in eastern CO, and northwest KS may be bisected by an attendant west-east oriented stationary front during the day.
1147 PM CST Wed Jan 17 2018 Got reports that Manitoba had some freezing rain as that precip was dropping south, and that seems to fit radar returns across our northern counties although surface reports are still rather sparse. Tonights forecast challenge will be the chance for freezing rain/drizzle changing over to light snow between midnight and 6am along and north of highway 2. Roads may be slippery in spots tomorrow morning as a result of the freezing precipitation.
1100 PM CST Wed Jan 17 2018 At 2 PM, a tight southwest surface pressure gradient was bringing slightly warmer air into the region from the Central Plains. For tonight, a short wave ridge will build across the region. With 925 mb temperatures around 3C warmer than this afternoon, the high temperatures should easily climb into the lower and mid-30s on Thursday afternoon. This should allow the low water snow content to compress even more.
High pressure will weaken over the weekend as a disturbance brushes northern Arizona.
1202 AM EST Sat Jan 6 2018 Low pressure will track across Labrador tonight through Saturday.
353 AM CST Sat Jan 6 2018 The deep upper trough that brought over a week of unseasonably cold weather to the region is finally deamplifying and lifting northeast. This will allow for temperatures to moderate this afternoon with highs rising into the low to mid 50s.
Going through today, a weak back door cold front will move from NE to WSW before stalling out in the far western areas. High temps on Saturday will be cooler behind the front in the east and warmer in the western Panhandles ahead of front with highs ranging from low 50s to near 60.
/issued 801 PM EST Fri Jan 5 2018/ Evening MFL RAOB sounding indicated dry air from the surface up to the mid levels with light north/northeast flow in the lower levels. /issued 426 PM EST Fri Jan 5 2018/ Deep troughing remains draped along the mid-Atlantic, transitioning to more of a zonal flow pattern over the Florida peninsula. The 12Z MFL sounding showed light northerly winds from the surface to 850 mb with very dry air in the lower and middle levels of the atmosphere. This has allowed for chilly weather this afternoon, with maximum temperatures only reaching the lower 60s. Heading into the weekend, models push a dry mid-level trough across the Gulf of Mexico and towards the Florida peninsula.
By this afternoon, however, a lee trough will quickly develop as mid level flow becomes increasingly zonal across the Rockies ahead of a mid to upper trough. Strong WAA and moisture advection will then commence late tonight through early Sun morning with the trough axis entering CO and NM. Above average temps and breezy conditions are expected Tue and Wed ahead of a closed upper low traversing the SW CONUS.
Rain, snow and freezing rain are possible mainly tonight with improving conditions on Saturday.
1110 PM CST Fri Jan 5 2018 Temps tonight will drop into the teens and perhaps a few single digits across the eastern Ozarks as a strong area of high pressure moves to our northeast and winds switch east- northeasterly. High temps tomorrow will be somewhat similar to today with a range from the low 40s west to the upper 20s east.
/issued 241 PM CST Fri Jan 5 2018/ Conditions are much warmer today than what we saw yesterday with abundant sunshine across the region. Dry northwest flow in place will persist through tomorrow with upper ridging to the west and a broad upper trough across the eastern ConUS.
307 AM CST Sat Jan 6 2018 1040 mb high pressure system will sink southeast across the Midwest and into the upper Ohio Valley today and tonight, reinforcing the arctic cold conditions across the region.
250 AM EST Sat Jan 6 2018 TODAY AND TONIGHT: High pressure building to our north will allow the low level wind flow to veer to a more zonal pattern across the region today. Tonight temperatures will also be warmer then the past few nights. Lows will be in the low to mid 40s interior and west coast. With temps in the low to mid 50s in the east coast metro and upper 50s near 60 for the Atlantic coastal areas.
1030 PM MST Fri Jan 5 2018 Breakdown of the western ridge will be completed tonight as a fast moving Pacific system tracks east-southwest across the Great Basin.
/Issued 412 PM CST Fri Jan 5 2018/ Upper ridge over the Intermountain West region will build east through late Saturday and then deamplify across the Panhandles.
The region is currently situated between an upper level trough over the eastern part of the country, and a ridge over the west. By Saturday morning, the ridge begins to break down, but northwest flow will remain over the Northern Plains. At the surface, strong high pressure will remain over the eastern Dakotas and Minnesota tonight, then begins to get pushed to the southeast on Saturday ahead of an elongated low pressure trough sliding from the Rockies to the western high plains. Southerly winds will begin to usher warmer air in on Saturday, with highs in the upper teens east to the lower to mid 30s west of the Missouri River.
Chose to leave freezing fog in the forecast overnight, although it is not anticipated to be as dense as it was last night, and some areas may only see low stratus cloudiness as opposed to fog. Hickford Tricky forecast today, especially with the patchy and dense freezing fog at times. For the immediate short term forecast this evening, current thoughts are that the advancing area of clouds from the west will generally prevent another round of dense freezing fog from forming tonight, but patchy freezing fog still looks possible. Tomorrow, some lingering diminishing areas of freezing fog look possible, but as time goes on, we expect some partial clearing for Saturday afternoon.
208 AM MST Sat Jan 6 2018 Water vapor shows upper ridge over the Northern Rockies nudging into the Northern Plains, with trof working through the Pac NW. As upper ridge continues to build into the Northern Plains today, arctic boundary will shift east and allow all fog to dissipate by the afternoon hours, with temps climbing into the 40s/50s in all but our far eastern zones. Short wave trof crosses the region tonight bringing some light rain/snow showers, but nothing significant expected.
300 AM CST Sat Jan 6 2018 Another quiet and cold weather day with high pressure across the mid Mississippi River valley.
1056 PM CST Fri Jan 5 2018 Deep Polar low remains situated over southern Quebec/northeast CONUS with weak upper ridging approaching the Rockies. At the surface, high pressure extends from western Ontario down through the upper Mississippi Valley.
The low level warm advection has been supporting steady flurries across much of central North Dakota this morning. The Superblend guidance trended the highs down 1 to 2 degrees over previous forcast implying the inversion will be late to break, or at least not see as robust mixing. Tonight the warmer air/subsidence moves across the region at h850 and in general this will continue eroding the clouds while holding temperatures up a bit.
few/scattered low/mid clouds could become possible ahead of an approaching cold front.
Hoenisch Weak ridging over the region will continue to bring warm temperatures and gusty westerly winds to the Plains while the valleys of southwest Montana struggle to climb out of the teens. The next cold front sweeps through the region during the day on Saturday with mainly mountain snow expected.
At 2 PM CST, arctic high pressure is moving into eastern Iowa with fair skies and very cold temperatures in the 5 to 15 degree range.
This will create another very cold night as clear skies and light winds combine to allow temps to drop into the low to mid 20s inland and low 30s along the coast. As the ridge shifts east, a gradual moderation trend will begin with highs on Saturday warming into the upper 40s and low 50s under clear skies.
Negative double digit temperatures are plentiful early this morning underneath a strong 1040 mb high pressure from Minnesota through outlying northern and central Illinois. Winds are becoming more often calm in these areas with the high moving in, but sporadic 4-7 mph winds have provided wind chills in the advisory criteria, so will continue headline as is through 10 a. The combination of the ridge axis moving overhead by midday and the residual snow cover, especially south and west, means that mixing should be quite limited. This results in upper single digits over the high albedo snow cover, to lower to mid teens in the Chicago metro area.
1042 PM CST Fri Jan 5 2018 The forecast area has largely been dominated by two halves today with a persistent stratus deck with relatively warmer temperatures west and clear skies with relatively colder temperatures east. High pressure responsible for our recent brutally cold temperatures finally slowly nudges east Saturday with an approaching warm front from the west.
359 AM CST Sat Jan 6 2018 The leading edge of a much anticipated warmer air mass was beginning to move across North and South Dakota early this morning. However, over Minnesota, and western Wisconsin, arctic high pressure is still in control for one more day. As the warmer air mass spreads eastward tonight, temperatures may actually begin to rise and by morning a few 20s and teens will be common across southern and central Minnesota. The onset of warmer temperatures could also develop a band of light snow, especially in central and east central Minnesota later tonight. The frigid eastern trough lifting out of the country will allow mild Pacific air to flow eastward.
328 AM CST Sat Jan 6 2018 With high pressure shifting east across the region, winds to become southeast at around 5 to 10 knots. Southerly flow to also maintain a warming trend with temperatures today expected to climb into the 50s while overnight lows fall to around freezing across southern Arkansas and southeast Oklahoma and the mid to upper 30s elsewhere.
Otherwise, dry northwest flow and surface ridging will produce mostly clear sky.
345 AM EST Sat Jan 6 2018 Cold temperatures should continue as building high pressure ends any remaining snow showers today.
KPDT Doppler radar showed a batch of showers moving northeast through eastern sections of the Lower Columbia Basin and the Foothills of the northern Blue Mountains of Oregon and the Blue mountain Foothills of southeast Washington at 815 PM PST. Surfaces temperatures early this evening were 32-35 degrees so most of the showers were reaching the ground as rain and not freezing upon surfaces.
High pressure will persist across the region through tonight.
An upper trough will shift inland tonight and showers will taper. Saturday will be mainly dry with weak high pressure aloft.
High pressure will keep the area mostly sunny today, but still cold through the afternoon.
However, the prominent upper trough over the eastern U. As high pressure moves through the Midwest, our highs today will remain quite cold, close to 10 over the deeper snow pack.
1133 PM MST Fri Jan 5 2018 The upper level ridge will remain over the area tonight, but will be flattened by an incoming disturbance on Sat.
452 AM EST Sat Jan 6 2018 The deep upper trough over eastern Canada and the northeastern U.
Biggest thing going on at update time is a band of clouds running northwest to southeast over the center of the mid-state that is keeping hourly temperatures a little warmer than we had.
334 AM CST Sat Jan 6 2018 As upper ridge builds in from the west will have mild wx.
Westerly downsloping winds develop later tonight and will promote warmer temperatures tomorrow across the local forecast area compared to today. Large scale pattern will feature northwest flow overhead and an upper-level trough extending from the Northern High Plains to Central Great Basin into CA early Saturday night.
These high clouds, in addition to light east/southeast winds, will help keep overnight lows warmer than the past few mornings in the mid 30s to lower 40s inland and near 50 along the coast.
/issued 407 PM CST Fri Jan 5 2018/ The cold front has moved south to near Interstate 40, and continued pressure falls in southern Oklahoma suggest that it will likely continue to drift south this evening. But there are no significant impacts with this front as temperatures are only slightly cooler north of the boundary.
, with the center of the high over Minnesota. With a broad mid-level trough still stretched across the eastern U.
/issued 231 PM CST Fri Jan 5 2018/ Upper level ridging that has been in place will begin to break down this weekend.
325 AM CST Sat Jan 6 2018 The mean trough remains anchored over the east early this morning, resulting in well below normal temperatures for most of the eastern CONUS. This wave has driven a weak, reinforcing cold front across the Mid-South which will temporarily stall the warming trend. Northeast winds today will keep afternoon temperatures in the 30s across most of the Mid-South, although some areas south of I-40 are expected to reach the lower 40s.
1251 AM EST Sat Jan 6 2018 The deep upper trough over eastern Canada and the northeastern U.
Winds are light and southerly to near calm tonight and will trend more E/SE through Saturday as a weak cold front eases south into the region before becoming stationary. While WWA is not expected to be strong, a southerly component to the wind should at the very least allow for slightly warmer temperatures than what was experienced on Saturday with more sun than clouds expected on Saturday.
First, is the PoP's for the lower elevations later today as short wave rounds the ridge aloft this afternoon. That said, there is a slight chance of some brief freezing precipitation.
This is responsible for the increasing opaque high cloud cover, but the air mass in the lowest 15kft remains very dry. Tonight-Saturday: Ridge eventually breaks down in response to a fast moving positively tilted trough swinging from the Pacific Northwest and across the Central Rockies. Low pressure should also shift eastward finally pushing the coldest air mass east of our CWA allowing for warmer temps in our east. Current indicating is the with low pressure beginning to shift east southerly flow would limit the potential and latest guidance keeps fog potential north and east.
Expect wind speeds to vary from calm to 3 knots in the western CWA, closer to ridge axis over MN, extending into central/eastern IA to 3 to 8 knots over most of the eastern CWA. Gusty northwest winds will continue over the near shore waters through the night, gradually weakening on Saturday as a high pressure ridge axis moves closer to Lake Michigan. The winds will back to the south Saturday night and likely increase to Small Craft Advisory levels as warmer air surges northward into the Great Lakes ahead of a weak low pressure trough. Other than the continued cold, not much else will be going on through tomorrow with high pressure remaining in place.
317 AM EST Sun Dec 10 2017 A strong upper level trough and accompanying surface cold front will cross the Carolinas early this morning. High pressure will build into the area and extend across the region through Monday.
1255 AM EST Sun Dec 10 2017 A strong upper level trough and accompanying surface cold front will cross the Carolinas early this morning. High pressure will build into the area and extend across the region through Monday.
1107 PM EST Sat Dec 9 2017 A low pressure system rotates into the area tonight with windy conditions and mountain snow showers.
An upper level trough remains over the eastern 2/3 of the country this morning. Canadian high pressure stretches from the Rockies into the Gulf of Mexico. Through the week the upper trough will remain in place which will keep a general northwest flow in place, however a couple of short waves will round the base of the larger trough.
323 AM CST Sun Dec 10 2017 Warmer weather will spread into the region today and Monday as highs top out in the 50s both afternoons. An upper level trough will dive south through the region Monday sending a front south through the area.
A 524 dm 500 mb low over northeast IN was within a strong upper level trof over the central Ohio river valley. As upper level low/trof pulls further away from IL by early evening, expect clouds and brisk NW winds of 15-25 mph and gusts 25-35 mph to diminish. Lows Sunday night in the low to mid 20s as winds diminish light and clouds increase from the NNW overnight Sunday night. Highs Wed in the lower 30s ne CWA and upper 30s sw CWA.
Synoptic pattern remains similar to yesterday with a deep trough over the Northeast U.
Upper level trough axis has shifted east of the area with a dry northwesterly flow now its wake.
905 PM MST Sat Dec 9 2017 Fairly quiet and dry weather is expected the next several days as high pressure remains parked across the western United States. Large, high amplitude ridge remains anchored over the western CONUS, centered over central NV as seen in the 00z plot data. A weak closed upper low has formed to the south of the main high center, off the southern Baja coast, and this feature has been spreading high clouds north and into Arizona. Across the Southwest, an upper level low is beginning to undercut the West Coast ridge. Ensemble means are suggesting a short wave trough will flow down the front/east side of the ridge in the Thu-Sat time frame.
The high risk of rip currents will continue through Tonight across the Gulf Coast beaches and there will be a moderate to high risk for Sunday across the Gulf Coast beaches. Cold air advection will continue for the rest of tonight as winds will remain northerly behind the cold front.
A few snow showers will linger through this evening as an associated upper low passes through the region, but additional accumulations will be minimal. After dry conditions tomorrow, another quick upper low will bring rain and snow showers to the northern counties early in the week. Further out, additional upper waves will continue to rotate through the area in the wake of the main upper trough.
Clear and dry weather is expected tonight with lows in the low to mid 20s. Another fast moving clipper system will dive into the lower Ohio Valley Monday afternoon and evening. Ahead of it, strong southwest winds will usher in warmer air with highs reaching the mid 40s to lower 50s. By Monday late evening into Monday night, post-frontal moisture gets trapped in the lower levels under a strengthening inversion.
along with lower RH values due to warmer temps in the 60s to low 70s.
314 AM CST Sun Dec 10 2017 Today and Monday will be much warmer than the last several with afternoon temperatures ranging 12 to 20 degrees above mid-December normals.
The axis of a potent upper level trough is currently moving across our area this afternoon. As skies become clear overnight and winds become light, temperatures are expected to drop below freezing across the majority of our area. Exceptions could be along the Gulf Coast and possibly the city of Tallahassee due to the urban heat island effect, where temperatures could remain near to slightly above freezing through the early morning on Sunday. High pressure will dominate through the short term.
However, full saturation of the low level is not expected, which will result in only very light precipitation amounts. A north-south oriented warm front extended from western Manitoba across the eastern Dakotas this afternoon. This warm front will continue moving east as a west coast upper level ridge continues to expand eastward across the Rockies and western Plains. This warm airmass remains in place through Sunday, with even warmer H850 temperatures advecting into the state. Kept the higher side of forecast temperature guidance with highs in the lower 50s for much of southwest and south central ND, with 40s elsewhere except in the Turtle Mountains and along the James River Valley, where highs should reach into the 30s.