Aikyam-Lab/Synoptic-Bench huggingface dataset:
In the upper levels a trough is over the Central and Eastern U. A cold front will move through the region this evening. Some thunder is possible this afternoon as dew points climb into the lower 60s.
So instead of heavy rainfall, we will contend with areas of fog although not widespread dense, a few locations may observe dense fog especially close to cooler water bodies this morning. The main cold front will move through this evening with no moisture to work with.
A cold front is expected to back door through the terminals after 05/00Z which could increase wind speeds. /issued 231 PM CST Sat Feb 3 2018/ Upper pattern has a ridge centered along the CA coast with a weak trough over the center of the country. As this trough swings east zonal flow will set up behind it for the first of the week.
Additional snow showers will occur as a cold front moves through late this afternoon into the evening.
Temperatures will continue to fall or remain steady in the afternoon, while the southward moving high pressure center eventually stretches from the Missouri valley across western Oklahoma overnight The cold air in place will become quickly eroded by the southwesterly gradient winds early Monday. Official model blend forecast for the southwestern counties reach into the mid to upper 60s midday, in advance of a cold front that should turn winds north in the afternoon with strong cold advection Monday night.
1112 PM EST Sat Feb 3 2018 A storm system will move north of the region Sunday dragging a cold front through the area later in the day and overnight.
Still looks like folks along the Highland Rim and over the northeast could see some snowflakes mix in with the rain as atmosphere saturates late tonight. A broad area of rain is now working its way into Middle Tennessee this evening ahead of a cold front that is still west of St.
However, latest CAMS continue to indicate that snow will end from north to south over the region as high pressure builds in. One wave has departed with a 1 to 2 inch snowfall and freezing drizzle for the Sisseton hills, however the stratus remains in place. High pressure moves overhead for Sunday with little mixing, add in fresh snow cover and it will be a struggle to warm during the day.
1039 PM MST Sat Feb 3 2018 The trailing edge of a trough and surface cold front that is plunging south over the plains states will continue riding over eastern UT and western CO through tonight.
To the northwest of the low, light to occasionally moderate snow will continue across the U. Improvement to VFR with clearing is expected at KIWD and KSAW as winds back with an approaching ridge. Combined with below freezing temperatures, heavy freezing spray is possible across eastern parts of Lake Superior tonight and across much of the lake Sunday night into Monday. Heavy Freezing Spray Warning until 5 PM EST Monday for LSZ266- 267. Heavy Freezing Spray Warning until 7 AM EST this morning for LSZ263>265.
1133 PM CST Sat Feb 3 2018 Cold front had moved into northeast NE at 20z, and will quickly spread through the remainder of the forecast area this evening. The 1031 arctic high pressure quickly moves in Sunday afternoon, then moves east Sunday night.
320 AM CST Sun Feb 4 2018 An upper level trough is over the Upper Midwest and extends southward over Louisiana. As the upper trough moves eastward today, a cold front will push southward towards the area. This will result in cooler high temperatures today across the northeast CWA with warmer temperatures across southern and western sections of the area.
We could see a few sprinkles into early this evening across southeastern Kansas and west-central Missouri, however the low levels of the atmosphere will remain awfully dry. By later tonight, a cold front will begin plunging south across southeastern Kansas and central Missouri. Monday night will be a period to watch as models bring a cold front right back through the area beneath an increasing west- southwest flow aloft. Thus, we may be looking at some drizzle/freezing drizzle potential.
956 PM MST Sat Feb 3 2018 Area radars and observations are showing snow continuing in the high mountains. Forecast soundings don't show the best profile for any freezing precipitationout on the plains towards 12Z Sunday. A cold front is expected to push into the Urban Corridor from the east/northeast in the 12-15z window Sunday morning. There will be a chance of light snow over the far northeast plains with the passage of the trough axis and cold front, with a slight chance of freezing drizzle primarily in the 12-16z period. For the plains, a sharp cold front will drop southward in the afternoon, with falling temperatures likely.
1249 AM EST Fri Jan 19 2018 High pressure centered south of the region will extend up the western side of the Appalachians through the end of the week.
Abundant cirrus streaming over the region this evening allowing temperatures to stay in the lower 30s as of 9 pm. Clouds will break up in patches overnight making the low temperatures forecast rather challenging. Upper level ridging will continue to draw up warmer air into the region.
Road surface temperatures across the Arco Desert (Highways 20/26) from Tom Cat Summit to Arco to Blackfoot and Idaho Falls are below freezing, so any Rain falling on these surfaces may create a few slick spots overnight. Expect a strong cold front to arrive tonight.
Aloft the ridge is a little farther south, so the return flow will be going during the day today and overnight.
Very quiet weather throughout the Tennessee Valley tonight as high pressure has established itself at the surface and aloft. This added moisture will help keep lows anywhere from 5-10 degrees warmer than last night, despite the good radiational cooling that has taken place this evening. Given the higher RH values around daybreak, we'll need to watch for the possibility of some patchy freezing fog, mainly around area lakes and river in the usual fog prone areas.
1002 PM MST Thu Jan 18 2018 Water vapor shows large trof just off the west coast with upper ridge axis extending through the Central Rockies through the Northern Plains. Broad surface trof over our region resulting in W/SW downslope flow with early afternoon temps in the 40s and 50s. Temps may be a couple degrees cooler on Friday with thermal ridge shifting to our east. Large upper trof currently off the west coast will make its way through the Rockies on Saturday while splitting. Northern stream will be quite weak with the southern stream developing a strong closed low near the Four Corners.
328 AM CST Fri Jan 19 2018 Today through Saturday will be quiet with warmer than normal temperatures, with a weak upper level ridge over the area. Lows in the 20s tonight put us well above normal, with our overnight low at DLH warmer than the normal low temperature.
109 AM EST Fri Jan 19 2018 High pressure will build in from the west tonight through the weekend.
1223 AM EST Fri Jan 19 2018 High pressure will maintain dry and warmer weather through Saturday. Intensifying warm advection and rising heights in advance of Cntrl Rockies-to-Plains low pressure will drive Upper Ohio temperature well above the averages for the start of the new week.
401 AM EST Fri Jan 19 2018 High pressure centered over the Gulf Coast states will extend up into the region into the weekend.
A slow moving cold front continues to move across portions of eastern Oregon which will slowly move off to the southeast overnight. The upper level trough behind the front will remain over the region on Friday leading to some showers through the days. A slow moving front is exiting the area with a broad upper level trough remaining over the region through Friday leading to mostly cloudy conditions.
A light northerly flow in the lowest levels with a moderate to strong westerly flow aloft.
High pressure will dominated the low levels this weekend, with a cut off upper level low traversing the northern Gulf coastline. This low will increase upper level cloudiness Friday night through Saturday night, but will otherwise have little to no impact on the forecast. Minimum temperatures will still drop into the low 30s Friday night, but will only dip to upper 30s to low 40s on Saturday night.
241 AM CST Fri Jan 19 2018 High pressure at the surface will remain ridged across the lower Mississippi and Tennessee river valley through the period. Coincident with that, Low pressure aloft will be developing/drifting into/across the lower Mississippi valley. Anticipate Highs nearing 40 today to increase another 5 to 7 degrees tomorrow, with Lows following a similar pattern (or tad better) nightly, from their bottom out levels near the freezing mark tonight.
254 AM EST Fri Jan 19 2018 Arctic high pressure over the Gulf Coast region today will move slowly southeast toward our area Tonight. High pressure will remain centered over the area on Saturday.
1252 AM EST Fri Jan 19 2018 High pressure settles across the deep south through the weekend.
139 AM EST Fri Jan 19 2018 A large are of high pressure centered over the Lower Mississippi Valley will maintain fair skies for the next few days.
1215 AM EST Fri Jan 19 2018 Arctic high pressure will continue to build overhead through this morning. The high pressure will shift to our south this afternoon through the weekend, allowing for a much milder southwest flow. The 00z GSO sounding is quite dry, with dry air upstream at all levels, and highly stable in the lowest 3 km. Another day of full sun combined with these warmer temps will go a long way in helping to thaw/melt snow off the roads and sidewalks. However, good radiational cooling conditions Friday night and antecedent dry air/low dew points in the teens and lower 20s will result in overnights once again down into the 20s, which will cause black ice conditions again on sidewalks, bridges and overpasses.
This afternoon, southerly winds have helped warm temperatures to above freezing across all of the CWA except the area between Caruthersville, Missouri and Paris, Tennessee. By tomorrow, all locations will see highs above freezing. One more chilly night is expected across the Mid-South as lows are expected to drop from the mid teens near Paris to the lower 20s across Eastern Arkansas. Even warmer conditions are expected for the weekend as southerly winds will increase ahead of a developing low pressure system in the Plains. In addition, light showers or drizzle may begin to develop by early Saturday morning across portions of East Arkansas, Northwest Mississippi, West Tennessee, and the Missouri Bootheel due to a weak upper level low that will be moving through the area.
318 AM EST Fri Jan 19 2018 High pressure will prevail through the weekend.
Low temperatures tonight in the low to mid 20s with highs Friday in the 60s, possibly a few low 70s. For Friday night lows in the low 20s to around 30. Cooler air moves in from the north Saturday with high temperatures ranging from the mid 40s north to mid 60s south. This feature is progged to amplify into an upper level low as it progresses east to the 4-Corners region on Saturday, with further amplification expected as it emerges east of the Rockies onto the Central Plains.
With the subsident side of the weak upper low reaching I-35 Friday evening, a quick drop to lifr or worse conditions are agreed upon by guidances as the surface dewpoints remain moist in a light southerly sfc wind. For tonight, a coastal trough across the southern Texas coast will deepen. The cyclonic flow associated with this trough will bring an increase in moisture to the coastal plains tonight. Given the increase in moisture along with lift from an upper low to our northwest, we will continue to mention a low chance for rain near the coastal plains tonight. On Friday, the coastal trough should move a little farther inland as the upper level low moves across southern Texas.
301 AM CST Fri Jan 19 2018 Temperatures are in the low to middle 20s across most of the Midsouth, likely cooling another 2-4 degrees by sunrise. Temperatures will warm quickly, with moist of the region above freezing before midday. Temperatures will remain above freezing for several days. still a little below normal at most locations, but much warmer than we have endured for most of 2018. Clouds will return to the Midsouth tonight as a low latitude trough tracks along the Gulf Coast.
328 AM EST Fri Jan 19 2018 High pressure will maintain dry and warmer weather through Saturday. Intensifying warm advection under building upper high pressure in advance of a Cntrl Rockies-to-Plains low will drive Upper Ohio temperature well above the averages for the start of the new week.
231 AM CST Fri Jan 19 2018 Southwesterly winds will continue to bring warmer temperatures in to the region through today. The combination of cold ground or remaining snow cover, warm moist air and a flat upper level ridge moving across the plains will combine to produce low stratus and the potential for widespread fog across the region tonight. Southerly surface flow will continue through the day Saturday allowing temperatures to climb into the lower to middle 50s as a storm system develops and begins to move across the plains.
The lows for Saturday morning are slightly warmer in the 20s and lower 30s, although still just slightly below average.
1123 PM CST Thu Jan 18 2018 Temperatures have finally climbed above the freezing mark after being in the deep freeze the past few days. With full sunshine and temperatures above freezing, should begin to melt some of the snowcover remaining across the area. The Arctic high pressure system has shifted to the deep south allowing for a south to southwest surface wind.
329 AM CST Fri Jan 19 2018 Broad southwest flow leading to ample warm air advection this morning as high pressure continues sliding into the Deep South and pressure falls occur well off to our west. Despite what appears to be a strong subsidence inversion, gusty southwest winds may be able to mix some of this warmer air aloft down to the surface. Warm air advection expected to continue overnight with lows only expected to fall the lower to middle 30s, which should feel warm considering temperatures of recent weeks. , broad southerly flow will prevail across the lower and mid- Mississippi Vly with increasing moisture advection thanks to a wide open Gulf of Mexico.
102 AM EST Fri Jan 19 2018 High pressure is forecast to build to the north of the area. While can't rule out a few of the coldest spots over the NW interior touching freezing, a widespread or prolonged freeze looks unlikely. /issued 338 PM EST Thu Jan 18 2018/ Temperatures warmed up into the low 60s this afternoon for most of the east coast metro area. Tonight, good radiational cooling and lighter winds will allow for significant cooling, although the lows tonight won't be quite as cold as last night. On Saturday, a weak transient ridge should help maximum and minimum temperatures rise to near seasonal averages. Both the GFS and ECMWF agree in drifting a weak upper-level low pressure disturbance eastward across the northeastern Gulf or southeast U.
Weak cold front drops through the area Friday night knocking temperatures back a few degrees.
355 AM EST Fri Jan 19 2018 A large area of high pressure will build east across the southern United States today and eventually move off the east coast.
MAV guidance not as aggressive with the low clouds, but the GFS-LAMP data is showing the potential for lower clouds. With temps in the 30s this afternoon, any melted snow will add to the low level moisture.
210 AM EST Fri Jan 19 2018 With high pressure passing south of the area, a southwest flow will bring milder air through the weekend, with a warm front passing Saturday.
350 AM CST Fri Jan 19 2018 January thaw that started from I-57 west yesterday, will occur over eastern IL too today as temperatures warm into the lower to mid 40s this afternoon. 1030 mb high pressure across the Gulf Coast States will stay across the southeast states today, keeping central IL with breezy ssw winds of 10-18 mph and gusts of 20-25 mph. 992 mb low pressure over southern Manitoba will track east to the southern tip of James Bay Canada by midnight tonight and bring a cold front down into far northern IL overnight. Lows tonight just below freezing, 28-32F. Highs Saturday in the low to mid 40s, held back some from increasing low level clouds.
1125 PM CST Thu Jan 18 2018 Quiet weather continues in the short term as a ridge across the Rockies flattens into a zonal pattern tomorrow. A fairly dense cirrus shield has topped the ridge overspread the forecast area this afternoon so skies will be mostly to partly cloudy tonight with lows in the lower to mid 20s. The boundary stalls in the area on Saturday, with a little cooler highs in the lower to mid 40s.
1115 PM CST Thu Jan 18 2018 No changes this evening, with temperatures still on track for lows in the low to mid 20s.
135 AM EST Fri Jan 19 2018 High pressure will build across the region through Friday night. Low pressure moving across southern Canada during the day on Saturday will bring some precipitation to the northern parts of the forecast area.
253 AM EST Fri Jan 19 2018 Quiet weather for the region early this morning, save for some light south to southwest winds that are keeping us warmer than the past few nights.
336 AM CST Fri Jan 19 2018 Main forecast issue in the short term is the current advisory for freezing rain. However, road temperatures are below freezing, thus certainly a potential for freezing rain on untreated roads, sidewalks, parking lots, etc. There have been a few reports of light freezing rain over far northeast Montana during the past hour and think this should move into northwest ND in the next hour or so. Metro Model shows that by 15-16Z road surface temperatures will be warming above freezing. Again by late morning, will see road temperatures rise enough that freezing precip will no longer be a concern. East of the highway 83 corridor will probably limit any precip to a mention of sprinkles or flurries. Cooler and drier air seeps southward over the forecast area tonight and Saturday with mainly dry conditions expected.
432 AM EST Fri Jan 19 2018 A large area of high pressure centered over the Lower Mississippi Valley will maintain fair skies for the next few days.
1120 PM CST Thu Jan 18 2018 Updated aviation section for 06z taf issuance The warming trend is underway with high pressure off to our south and east. This out ahead of a vigorous H5 trof out west, with s/wv ridging ahead of it across our area.
311 AM CST Fri Jan 19 2018 Persistent low to mid level troughing today and Saturday will lead to some breezy conditions developing both afternoons while continue low level warm advection will see temperatures climb into the 60s and 70s today and 70s Saturday.
This weekend, high temperatures will be mostly in the lower to middle 40s. In the rest some wind helping to mix the low levels so 15 to 25 degrees. High temperatures in the low and mid 30s with warm air advection in the low levels. Saturday under a flat upper level ridge. A weak short wave moves through upstate NY with the low level shifting to be off Lake Ontario into the Tug Hill Plateau again. Temperatures still warmer with highs in the low and mid 40s. Weekend will be quiet and mild as high pressure at the surface and aloft builds in. With a rather flat ridge aloft, a rather zonal flow will keep the temperature advection neutral, but increasing sun will help the surface temps above normal with 850 mb temps around 0C, and thickness values around 548dm.
359 AM CST Fri Jan 19 2018 The midlevel trough that will impact our weather this weekend is currently located just off the west coast of CA and is forecasted to cut off from the main flow as it deepens over the Four Corners region. Ahead of the approaching trough westerly flow aloft is supporting the lee-side trough, which has resulted in an increase in the lower tropospheric pressure gradient. Lee-side cyclogenesis occurs in southeast CO as the deepening midlevel low pressure ejects out of the Rockies.
Dry weather with plenty of sunshine will then prevail for Saturday as building mid-level high pressure replaces the closed 500 mb low.
350 AM EST Fri Jan 19 2018 High pressure over the Lower Mississippi Valley will move east across the Gulf Coast states today and tonight.
Tomorrow the trough will be slowly digging along the Left Coast as another core of stronger winds aloft drops in upstream. This presents another a prolonged opportunity for moisture to be transported into the trough. Plenty of cloud cover will be in place and even a few light snow showers may develop on the some of the higher peaks in the pre-dawn hours in this gusty warm advective flow.
1237 AM EST Fri Jan 19 2018 With high pressure passing south of the area, a southwest flow will bring milder air through the weekend, with a warm front passing Saturday.
255 AM EST Fri Jan 19 2018 Arctic high pressure over the southeastern United States will slowly move south through Saturday. Clear skies were noted under the expansive, arctic high pressure centered over MS/AL this morning. The high extended northeast to cover all the mid-Atlantic states.
The ridge will be sliding to the east, so a very weak return flow will begin late today.
254 AM EST Fri Jan 19 2018 High pressure will move east through the southeast states this weekend.
1139 PM CST Thu Jan 18 2018 The latest water vapor images showed a ridge over the central CONUS with an upper low off the BC Coast. This ridge will flatten and translate east through Friday as a trough approaches the West Coast. The result is that mild and dry conditions are expected to continue tonight through Friday as 850-mb temperatures run well above average under the influence of the upper ridge. The western trough will move over the southwestern CONUS Friday night and Saturday, and deepen. As this occurs, a cold front will drop south into northern NE Friday night, and across the rest of the area on Saturday. Low-level moisture with dry air aloft may also result in areas of freezing drizzle developing over the northern NE Panhandle during Saturday afternoon.
/issued 921 PM CST Thu Jan 18 2018/ Updated for stratus and slightly warmer overnight lows, along and east of a San Angelo to Sonora line. Otherwise south winds may gust over 20 KTS at KABI and KSJT by noon Friday as lee trough develops.
Current air temperatures in northwest ND are in the mid 30s, and road surface temperatures are at or just below freezing. Will continue the advisory for now with road temperatures at or below freezing, it won't take much liquid to make streets and sidewalks icy. A few of the latest high-res models are starting to suggest that freezing precipitation could stick around a little later in the morning.
Broad trough at 500 mb dominates the CONUS aloft. with a ridge axis all the way over on the Pacific Coast. Northwesterly winds as high pressure continues to spread over the Plains to the west. The northwesterly flow breaks down as the 850mb thermal ridge shifts to the east.
230 PM CDT Sun Jun 25 2017 Tonight and Monday: The next 24hrs will be rather quiet and on the cooler side for late June standards. This will work in tandem with the cooler/drier air filtering through the forecast area behind the cool front.
145 PM EDT Sun Jun 25 2017 A tropical airmass will linger into Monday as a cold front approaches from the northeast.
1110 AM MDT Sun Jun 25 2017 A 90 kt jet is moving through northwest flow over the northern plains, as the upper ridge builds over the western CONUS.
A mid level weakness will remain over the West Gulf, splitting a ridge centered over Northwest Mexico/Arizona, and the Bermuda ridge extending across Florida into the Gulf. High pressure behind the front has pushed out into the Northwest Gulf and is supporting light to moderate east winds. Temperatures will be in the mid 70s at night and held to the lower 90s during the day.
/issued 236 AM CDT Sun Jun 25 2017/ Convection finally on the increase across northeast New Mexico and the Panhandle as a short wave trough and associated modest jet streak begin to act on the low to mid level moisture in place across the southern High Plains.
145 PM EDT Sun Jun 25 2017 A cold front will push southeastward through central North Carolina, weakening as it pushes to the coast later today.