Aikyam-Lab/Synoptic-Bench huggingface dataset:
Surface wise, a large western Atlantic ridge extends across the northern half of the Sunshine State and into the northeast Gulf of Mexico, with a trough in the western Gulf. Deep layered ridging resulting in limited moisture confined below 900 mb will pose a significant challenge for even low top light showers. Under partly to mostly sunny skies and east to southeast winds of 10 to 15 mph, temperatures will climb into the lower 80s in many island communities.
so while 850mb temps are slightly warmer today than they were yesterday, the net impact should be slightly cooler temps today than yesterday. However, with the WAA, the modestly saturated DGZ will be around 4km, with the low level cloud base in the lowest 1 km.
636 AM EST Mon Feb 12 2018 High pressure will build into the region from the Great Lakes today and Tuesday.
An upper level ridge over the area will result in a sunny day today and a clear night tonight. The ridge will shift south on Tuesday with a weak system moving down from the northwest reaching the area Tuesday night.
Not a whole lot changes as we get into Tuesday although moisture will start to decline a little bit as the aforementioned boundary begins to dissipate and high pressure starts to build back in over the area.
506 AM EST Mon Feb 12 2018 A cold front will cross the area early this morning.
350 AM PST Mon Feb 12 2018 Cooler temperatures this week.
940 AM EST Mon Feb 12 2018 A cold front will swing through the North Country through the overnight hours and lead to rapidly cooling temperatures just before sunrise today.
Radar returns filled in across our CWA after midnight as upper low out west dropped into Nevada creating some isentropic lift and divergence over our region. Best upper energy slides southeast of us by afternoon as upper low out west tracks slowly south into southern California. Upper trof axis then slides southeast of this evening allowing cold dry air to settle over the eastern plains. Tuesday, mid and upper pattern quickly transitions to a zonal flow ahead of another trof developing in the Pacific NW. This will induce lee-side surface troffing which will cause winds to pick up in our western gap areas Tuesday night.
Freezing fog is possible this morning and Tuesday morning mainly across northern Nevada.
With cloud cover and high pressure ridge settling into the coastal plains, do not expect that much warming. Temperatures are not expected to decrease very much tonight with abundant cloud cover in place and weakening north winds with high pressure still in place. A short wave trough, over northeast Mexico during the evening hours, is expected to move through the Brush Country overnight. A coastal trough will move into the offshore coastal waters on Tuesday. With cloud cover, scattered showers, and high pressure ridge anchored over the Brush Country with the coastal trough over the offshore waters, temperatures will struggle to warm up. A moderate to strong offshore flow early this morning will slowly diminish after sunrise as high pressure continues to build into the area.
932 AM CST Mon Feb 12 2018 Arctic high pressure is the dominate feature today with impacts confined to cold temperatures and wind chill values. High pressure over eastern MT resulting in NW sfc flow over valley and adjacent regions.
409 AM CST Mon Feb 12 2018 Cold front at 3 am CST extended from Mobile to the lower portion of Plaquemines Parish south of Boothville out into the Gulf of Mexico. Temperatures range from the lower 40s at McComb and New Roads, to near 60 at Pascagoula and Boothville. Southwesterly upper flow will remain over the area through mid- week, with a slight tendency to build a little bit of ridging across the northern Gulf of Mexico. Ridge never really gets established enough to completely dry out the forecast.
Even though temperatures will be warmer on Tuesday, increasing southwest winds will keep wind chills in the 5 to 10 above range.
High pressure at the surface, centered north of the region, will continue to build south into the forecast area today. Aloft, west southwest flow will gradually become more zonal overnight, as ridging aloft builds further west over the Gulf of Mexico. With ongoing cold advection across the area today at the surface, and under the aforementioned cloud cover, noticeably cooler conditions will prevail during the period. This is already being observed right out of the gate this morning as temperatures are generally ranging from the lower 30s to middle 40s. Clouds will once again steadily increase from the south overnight, with lows tonight ranging from the lower 30s to middle 40s.
Chattanooga Airport, TN 46 53 43 61 / 40 30 20 20 Knoxville McGhee Tyson Airport, TN 41 49 40 57 / 50 30 30 20 Oak Ridge, TN 42 50 40 57 / 50 20 20 20 Tri Cities Airport, TN 43 49 38 54 / 60 40 30 30.
High pressure was centered over northeast Montana at 08Z with ridging into southern Minnesota, with fast northwest flow aloft. The center of the high moves over Minnesota by 00Z Tuesday. The high center drifts off to the eastern Great Lakes tonight as the warm air advection continues. Moisture will be slowly on the increase tonight ahead of an upper level trof that moves into the Dakotas late.
Taking a look at the 500mb pattern today, much of North America (minus eastern AK and western Canada) is under the influence of a large trough extending from the main low over northern Canada. The result has been a subtle ridge developing over WY/SD. The slight ridging will remain overhead through today, and become surpressed tonight as the northmen extend of the western trough moves in. Closer to the sfc, we're still under the influence of a ridge of high pressure, extending from northeastern MT/western ND. Warmer air on the back side of the exiting high, on south-southwest winds and still plenty of clouds, will keep temperatures from falling too far tonight.
Still expecting a rapid warm-up by mid week as downslope flow develops ahead of an opening closed low over the SW CONUS. The next cold front will arrive late Thu into Fri AM.
An area of light snow in the Lower Treasure Valley has shifted slowly east during the night. Meanwhile, light snow will increase from the south in Owyhee and Twin Falls Counties as an upper low gradually forms over northern Nevada. The low will move SSW- ward today toward southern California. Mostly sunny Tuesday under a short wave upper ridge from the north.
632 AM EST Mon Feb 12 2018 High pressure will provide fair weather today into Tuesday.
Clear skies and light winds will produce cold temps tonight in the low single digits. Favored cold areas such as Polebridge, the Seeley/Swan Valley and southwest Montana vicinity of Butte will have overnight lows 10 to 15 degrees below zero.
Combined with vertical mixing after sunrise, the low clouds should erode from north to south by late afternoon. Therefore, daytime highs today were trended a few degrees cooler. Southwesterly flow will increase tonight as an upper trough over the Great Basin becomes cutoff.
/issued 324 AM EST Mon Feb 12 2018/ TODAY AND TONIGHT: Ridge over the western Atlantic is rebuilding back to the west across the region this morning, allowing a drier airmass to move into the region.
919 AM EST Mon Feb 12 2018 A cold front will cross the area early this morning.
At the surface today, our ridge center currently over the Dakotas will shift east toward New York through tonight. Across Alabama, we will see a continued influx of cooler and drier air into mainly the northwest half of the area for the lowest readings, but the southeast will benefit some as well. With the ridge becoming somewhat flat across the Great Lakes into New York, our influx of cooler drier air will come to an end during tonight. This will set up a cold air damming pattern resulting in a backdoor cold front moving into Central AL. In all likelihood, the only noticeable impact from this backdoor front is moderation of the high temperatures in the eastern portions of the state on Tuesday afternoon.
Stratus deck looks to be mainly off the ground, so not expecting much in the way of thick fog and freezing drizzle/flurries, but there could be some spots. Again, the cold layer will probably be a bit more persistent then what the models are showing, but the low level gradient should also be going a bit more southerly again by morning. This should at least start the exodus of the low clouds and cold air. A moderate southwesterly flow aloft will be over Colorado with an elongated trough axis associated with a splitting systems stretching from the Upper Midwest to the central CA coast. Over the northeast CO, dry and warmer with a surface lee side trough developing over the eastern plains.
442 AM PST Mon Feb 12 2018 A low pressure system moving through California and off the coast of Southern California will bring cooler weather through Tuesday along with occasional periods of mostly light showers.
The precipitation is primarily a light rain and light freezing rain mixture with the freezing rain occuring across central and western areas. Partial clearing on Tuesday will combine with weak ul ridging and produce highs in the 50s to near 60.
631 AM EST Mon Feb 12 2018 A cold front will sink southward and into the forecast area this afternoon. The approaching cold front is forecast to move into the forecast area this afternoon and shift just south of the area tonight. The temperature guidance was close with highs in the lower and middle 70s today.
931 AM EST Mon Feb 12 2018 Broad high pressure centered over the Dakotas will build across the Ohio valley and lower Great Lakes today and Tuesday before reaching the east coast Tuesday night.
502 AM CST Mon Feb 12 2018 High pressure building into the area early this morning. Main concern will be impact of weakening mid-level trough ejecting out of the Rockies into the Upper Mississippi River Valley region tonight into Tuesday. Otherwise, plan on another cold day today with high pressure overhead.
951 AM EST Mon Feb 12 2018 High pressure and a drier airmass will build across the area Monday into Tuesday.
High pressure, to the east remains in control of the weather pattern. /issued 324 AM EST Mon Feb 12 2018/ TODAY AND TONIGHT: Ridge over the western Atlantic is rebuilding back to the west across the region this morning, allowing a drier airmass to move into the region.
534 AM CST Mon Feb 12 2018 High pressure will provide sunny but cold conditions across central Illinois today. Meanwhile, ridging will develop downstream across the Plains/Midwest. As a result, have kept high temperatures around freezing along/north of a Macomb to Minonk line on Tuesday.
With low level warm advection above the cooler surface layer may get a few rumbles of thunder. High pressure at the surface, centered north of the region, will continue to build south into the forecast area today. Aloft, west southwest flow will gradually become more zonal overnight, as ridging aloft builds further west over the Gulf of Mexico. With ongoing cold advection across the area today at the surface, and under the aforementioned cloud cover, noticeably cooler conditions will prevail during the period. This is already being observed right out of the gate this morning as temperatures are generally ranging from the lower 30s to middle 40s. Clouds will once again steadily increase from the south overnight, with lows tonight ranging from the lower 30s to middle 40s.
The coastal trough is expected to persist off the lower Texas coast through Tuesday. High temperatures today will generally be in the low to mid 50s area- wide. Lows temperatures tonight are expected to range from the upper 40s to the lower 50s. High temperatures Tuesday will slowly recover into the 50s with some locations reaching the lower 60s by late afternoon.
Winds will become more southerly on Tuesday with the high to our east. With the high well to the east on Tuesday the 850/925 millibar waa will persist on Tuesday.
Seasonably cool temperatures through Tuesday with an upper low off the Central Coast that will bring a slight chance of showers, mainly for the hills of the Central Coast.
Today through Tuesday high pressure aloft returns with dry sunny conditions although temperatures will cool.
For today, temperatures will continue to be chilly as high pressure passes to our north and keeps easterly surface flow through the day. Highs are expected to range from the middle 20s along the IA border, to the lower 40s in the southern portions of the forecast areas. But temperatures may only make into the upper 30s along the IA border and some areas in our south may climb into the lower 50s.
557 AM CST Mon Feb 12 2018 A reinforcing arctic cold front is settling south through the far southern CWA early this morning and will eventually stall just south of the CWA for today, leaving us with a cold low-level air mass as another upper level jet streak helps induce flurries/light snow north or the front over the bulk of our CWA for late this afternoon into the evening.
503 AM EST Mon Feb 12 2018 WV imagery and RAP analysis indicated a trough from ne Canada and Hudson Bay into the nrn Great Lakes resulting wrly mid/upper level flow through the region. At the surface, a ridge of arctic high pressure extended from Saskatchewan and Manitoba into the nrn plains and Mississippi valley. Tonight, favorable radiational cooling conditions this evening will allow temps to drop to around -10 inland, toward the lower end of guidance, before increasing clouds and weak WAA result in rising temps late.
The center of high pressure was across the northern Midwest this morning.
643 AM EST Mon Feb 12 2018 A cold front will swing through the North Country through the overnight hours and lead to rapidly cooling temperatures just before sunrise today.
A 1044 mb high pressure system was centered in ND and was providing clear skies and rather light winds to the dvn cwa. Today: High pressure centered across the Upper Mississippi Valley will supply sunny and cold weather to the area. Tonight: The center of the highs slips into lower MI so we start out clear early in the evening. Light east to southeast winds and thickening cloud cover (as seen on time height sections) will keep temperatures warmer than early this morning.
Latest sfc analysis reveals a very slow moving cold front draped across NE Georgia and extending SW through SE AL and the NW FL Peninsula. Kovacik Strong high pressure will hold over the Gulf of Mexico keeping a west to southwest flow across the southeast U.
After a cold start in the lower 20s this morning, most areas will see highs of 50 to 55. Increasing moisture and winds should keep most areas from falling in the 20s, with lows mainly in the lower to mid 30s.
607 AM EST Mon Feb 12 2018 A cold front will cross the area early this morning.
Temperatures will be pretty cold for one more night with freezing conditions possible across portions of the Coos and Douglas coasts.
Minor short wave troughs embedded within the mean flow will maintain a parade of cold frontal passages over west Texas and southeastern New Mexico.
Winds have taken a more N-NE-ly flow in wake of a dry cold front.
246 PM CST Tue Dec 12 2017 (Tonight and Wednesday) Temperatures at mid-afternoon are 8-15 degrees cooler than yesterday at this time, across most of our area.
1011 AM MST Tue Dec 12 2017 Upper ridge centered over the Great Basin will retrograde just a bit over the next couple of days, then rebuild towards the end of the week.
This will offer more of a warmer flow combined with sunshine. Temperatures will warm up nicely on Wednesday afternoon ahead of another cold front. The positive Pacific North American pattern will persist through much of the week, offering a cold front about every two days. The Arctic Oscillation tightens up, and the Pacific ridge breaks down. Surface winds will shift to the southwest tonight ahead of the next cold front.
/issued 1031 AM CST Tue Dec 12 2017/ A much slower warmup today compared to 24 hours ago and this is due in part to cold air advection in place across the Four State Region in the wake of a cold front which passed through the area late last night.
1041 AM MST Tue Dec 12 2017 Northwest flow continues over the northern plains, with a persistent upper ridge to the west and trough to the east. A band of low clouds and a warm front stretch from north to south across the central/eastern Dakotas.
1031 AM CST Tue Dec 12 2017 A much slower warmup today compared to 24 hours ago and this is due in part to cold air advection in place across the Four State Region in the wake of a cold front which passed through the area late last night. /issued 453 AM CST Tue Dec 12 2017/ Cold front has just moved south of I-20, with nw winds gusting near 20 kts in its wake.
Temperatures will drop into the low 20s early in the night, steadying through early morning with the increase in southerly winds. By noon Wednesday, the cold front associated with this fast moving system should already be approaching the Illinois River, with temperatures peaking for the day early just before frontal passage, and winds shifting to NW behind the front.
There may be a few clouds today during the late afternoon and early evening around 4K ft ahead of a dry cold front. Temperature forecast for today appears to be on track, with highs expected to rise into the low 70s for most locations this afternoon. Cold front over northern Florida expected to track through South Florida overnight. I expect low temperatures tonight/Wednesday morning to be a few degrees warmer than last night/this morning due to a more moist lower troposphere and stronger low-level winds. For the remainder of today, a broad trough draped over the southeast CONUS will maintain westerly flow in the low levels.
Some token low end PoPs linger over the weekend with the passage of a longer wave trough, but the primary low level baroclinicity will stay well removed to our south. The GFS and ECMWF do hint at a pattern shift beyond the valid period with western CONUS trough development and a transition to SW flow aloft, but does not look to mature enough for much precip through the end of the next work week. Low pressure will then near the MN/IA border by 12z which will bring increasing winds, especially beyond the valid period.
/Issued 342 AM EST Tue Dec 12 2017/ A dry cold front moving across TN this morning will push into NW GA around sunrise and continue move SE through the day. A colder airmass will move in across the state behind this cold front with low temps Wed morning running mainly in the teen and 20s across the CWA.
Rainfall is still not anticipated though as overall moisture is shallow for both the front and post front with the passage of the upper trough. We are looking at cooler temperatures returning behind the front for today and tonight with breezy northwest winds in store for today with tight surface pressure gradients ushering in cooler air.
334 PM CST Tue Dec 12 2017 A deep trough continues to affect the eastern CONUS with an upstream Rex Block in place across the west. This pattern will persist for a few more days but the ridge will gradually shift west over the Pacific, signaling a synoptic pattern change.
06Z surface data has the cold front from northwest Ohio across southern Iowa. The front then becomes a warm front across the eastern Dakotas into northeast Nebraska. then there may be a potential for some flurries or very light snow in the highway 20 corridor from Dubuque on east. a fast moving but intensifying low pressure system will bring areas of light snow and snow showers northeast 1/2 with local forcing tools suggesting some areas may pick up an inch or so that will likely not be better known for at least 24 more hours.
Considerable cloudiness brought on by an area of low pressure over the Gulf of California will gradually decrease tonight into Wednesday.
/issued 357 AM CST Tue Dec 12 2017/ A highly amplified pattern remains in place this morning per latest water vapor imagery, with a persistent ridge across the west coast, and trough across the east, and northwesterly flow aloft over Southeast New Mexico and West Texas. A weak cold front is currently moving through the area with little fanfare aside from a northerly wind shift and lower dewpoints filtering into the region. Temperatures today will be about 5 to 10 degrees cooler than yesterday, with highs in the middle to upper 50s for most, and 60s through the Rio Grande Valley.
With decreased radiational cooling assoc/w increasing wind, expect warmer lows than in previous nights, ranging from the upper 20s to mid 30s. With CAA in the morning, expect cooler highs in the mid/upper 50s.
The cold front has pushed through South Texas with north-northeast winds this afternoon.
Sfc winds will continue to veer after 18z in response to an upper trough moving southeast into the midwest and another dry boundary approaching from the north.
dry a cold front has moved through most of the state as of early this Tue morning. Cooler temps expected this afternoon.
A dry cold front will rapidly move through the local area from northwest to southeast this morning and early afternoon.
125 PM EST Tue Dec 12 2017 An alberta clipper will track over northwestern PA early today with a trailing arctic cold front sweeping through the area during the mid to late morning afternoon.
A strong ridge of high pressure will remain in place over the region. Otherwise forecast remains the same with low level inversion trapping low clouds, fog and cold air in the low elevations while mild and warmer above the inversion.
High pressure through mid week with a dry and warmer period. Updated the forecast to put areas of freezing fog completely through the next 24 hours for eastern Elko County and northern Elko County especially near the Utah and Idaho borders. Also included patchy freezing fog overnight in other areas of Elko County. High pressure through mid week with a dry and warmer period.
For tonight and Wednesday morning, a strong short wave trough, currently located over British Columbia, will move through the region.
1139 AM CST Tue Dec 12 2017 Cold and breezy conditions will take place today behind yesterday's cold front. Mostly sunny conditions can be expected due to the high pressure, however a few cloud bands can be expected at times due to lingering cyclonic flow aloft. Cold advection will cause temperatures to rise only a few degrees from current temperatures, only reaching the mid to upper 20s along I-74 to the low 30s from Springfield to Lawrenceville southward. Cooler air moving into the region right now going to keep much of the area below freezing today.
The attendant cold front will move south across the region by tomorrow afternoon bringing an reinforcing shot of cold air to the region. Highs tomorrow will be warmer than today as 850mb temperatures climb to around 0C, and surface winds will turn out of the southwest ahead of the front. These days are still expected to be dry, however these models are still advertising that there will be a pattern change by the weekend as the eastern longwave trough moves east which allows the northwesterly upper flow to transition to southwesterly.
Considerable cloudiness will continue across southeast Arizona into this evening due to an area of low pressure centered over the Gulf of California. This low will remain to our south through Wednesday with variable amounts of clouds and potentially even a few sprinkles. The low will also result in breezy east to southeast winds today.
The next system is over the ern Pacific and is poised to ridge through the ridge and drop southeast across us Wednesday afternoon and evening with some light snow in the mountains and probably a few flurries or areas of very light snow around the lower elevations of central Wyoming late Wed aftn or evening.
134 PM PST Tue Dec 12 2017 High pressure will continue to bring dry conditions along with valley inversions, cold nights, and light winds for the next several days. Inversions should ease by the end of the week as a weak cold front brushes the Oregon border, but no precipitation is expected. Mild days and cool nights will continue as a ridge of high pressure remains in place.