Aikyam-Lab/Synoptic-Bench huggingface dataset:
While the synoptic situation brings to mind a chance for freezing drizzle to develop behind the weak boundary tonight, have decided to omit from the grids due to lack of confidence that enough ingredients will materialize. Another arctic cold front arrives in the north toward morning, with temperatures dropping behind the front. Behind the front, much colder and drier air arrives through the day as high pressure builds in from the west. For Friday night, the high centered near the Mississippi River provides clear and dry conditions. Though winds will be relatively light under the high, expecting wind chills to drop to the -5 to -10 degree range in the north, so have continued a mention of this in the HWO.
Looking for a dry cold front tmrw around the noon hour. /issued 1023 AM CST Thu Jan 27 2022/ Another cold start to the day with freezing temperatures reported across a large swath of southeast Texas and southern Louisiana this morning. Look for increasing clouds overnight ahead of an cold front that will make the coast around the noon hour tmrw.
Then, zonal flow aloft today will give way to an upper trough that will quickly move over the region on Friday. Meanwhile, a surface cold front will will sweep down over the southeastern CONUS through the day on Friday. Current temperatures across the local area are mostly in the lower to mid 50s. Another chilly night is on tap tonight, as temperatures dip into the mid to upper 30s north of I-10 and into the lower 40s south. A cold front will move through the region on Friday; however, this is not expected to bring much to the local area beyond increased cloud cover.
Fairly quiet weather is then expected through the weekend along with temperatures closer to normal, as the deep trough over the central CONUS moves eastwards and generates a powerful nor'easter for the eastern seaboard.
1248 PM EST Thu Jan 27 2022 Aviation - Light Snow Developing Today - A cold front will gradually move in from the NW this afternoon and bring light snow showers. Some travel impacts are possible later today particularly well to the NW of KGRR due to the combination of the snow and brisk SW winds ahead of the cold front.
1201 PM CST Thu Jan 27 2022 (Today and tonight) In the near term, the freezing fog advisory continues until 9 AM over southwestern Oklahoma where several inches of snow fell yesterday.
1026 AM MST Thu Jan 27 2022 Current radar imagery shows some areas of light snow tracking from north to south across areas East of the Divide in association with a weak cold front moving in from Montana.
1124 AM CST Thu Jan 27 2022 Primary issue in the near term is ongoing patchy freezing drizzle from the Hwy 14 corridor into SW MN. Forecast soundings suggest temperatures in the existing stratus is very near but perhaps just warmer than the ice growth zone thus resulting in the patchy drizzle/freezing drizzle. Upper level ridging further establishes itself across the western CONUS for Friday into the weekend placing our area in the all-to- familiar northwest flow regime.
The much cooler temperatures have been a bit slow in piercing west central Minnesota.
Warmer Today Through Friday. 00Z XMR sounding shows a fairly moist profile in the low levels with a substantial dry layer in the mid levels, with a PW value of 1. Due to current observations, the cloud cover was reduced for this morning, however, due to the low level moisture, the clouds are expected to become cloudy once again by the afternoon. The low to mid level clouds will continue this afternoon and through the overnight hours, with general MVFR to VFR CIGs expected (BKN025-035).
256 PM EST Thu Jan 27 2022 High pressure will move offshore tonight.
At the surface, high pressure is currently pushing into the area from Saskatchewan which will aid in temperatures remaining steady through the remainder of the afternoon, if not cooling. Wind chills across this are likely to briefly approach 30 below ahead of a warm front that will move west to east overnight. Upper level ridging will then build in through the day Friday with highs reaching the upper teens to lower 20s east to near 40 southwest.
1255 PM EST Thu Jan 27 2022 An upper low pressure system will support rain and snow showers as it passes through the region Friday afternoon into Friday night. Increasing mid to high clouds tonight along with weak warm advection will support overnight lows 5 to 10 degrees warmer than last night, approaching normal for this time of year. As of 320 AM Thursday: Guidance continues to show a phasing split stream flow with a deep East Coast trof developing by Friday night. Deep cyclogenesis takes place off the Southeast coast with the low moving up the coast. Forecast soundings and thermo profiles also become increasingly favorable for a transition from rain to snow as strong cold advection develops in the wake of the coastal cyclone.
For Friday, the next upper-level trough digs south, with an associated cold front moving over the region, bringing more clouds and a chance for rain Friday and Friday night.
Northeasterly winds persist through the daytime hours today before becoming light and variable overnight ahead of an approaching cold front. The cold front will push through all the inland sites by 10Z-12Z with moderate northerly winds following in its wake. Associated cold front will be pushing across the area late tonight.
Winds mainly out of the N/NW this afternoon before shifting to N behind a cold front set to move through this evening. Current visible satellite shows clearing across our western counties, with just some lower clouds remaining along the lower Trans Pecos. Some light precipitation is expected to develop along and south of the lower Trans Pecos, mainly Terrell County and parts of the Big Bend. Any precipitation is expected to fall as rain given the warmer temperatures in the region, however, a flurry or two, especially in the higher terrain, cannot be ruled out. Highs Friday afternoon will be slightly cooler post-front, but clearing skies will still provide us a nice afternoon with upper 40s to low 50s.
242 PM CST Thu Jan 27 2022 A reinforcing cold front is currently located from across mid Missouri. A potent upper trough will swing through the Mid-South on Friday. Some of the CAMS are even showing some flurries occurring across West Tennessee and Northeast Mississippi Friday afternoon as the the trough moves through.
The trough is pushing a cold front through the area as well which is the focus for a broad band of snow showers. The snow showers have mainly been confined to the higher elevations with plenty of dry air in the lower valleys. As the trough exits this evening the snow showers should diminish quickly followed by clearing skies. There are indications that the inversions may lead to low stratus and or fog along the highway 40 corridor and around Gunnison tonight. Therefore went with some of the lowest temperature guidance for those problem areas for the next several days. The ridge of high pressure will build over the region tomorrow so temperatures begin to modify especially in the higher terrain.
Deep snowpack of more than a foot in some locales will result in cooler temperatures overnight. A ridge over the Western CONUS and northwest flow over the Central High Plains will aide in some warmer temperatures across the region. Areas from Burlington and Mount Sunflower to Russell Springs and Marienthal where the higher snowfall occurred, are expected to have highs in the 30s. Slightly stronger downslope winds and warmer daytime temperatures should help keep our temperatures several degrees warmer overnight with lows mainly in the teens and 20s.
This pattern will continue through the week as high pressure remains the dominant feature. Wind gusts are mainly up to 25-35 mph with some locally higher gusts of 45+ mph near wind prone gaps, canyons, and ridgetops, and they should decrease by early tomorrow morning. A closed low is slated to move through Southern California this weekend.
Troughing over the local coastal waters, along the east coast, has allowed for sprinkles/showers to push onshore across the Volusia/Brevard coasts this evening. Low pressure off of the ECFL coast will deepen and gradually move northeastward ahead of an approaching strong cold front. Fri night much cooler with M-U30s across the I-4 corridor and near 40 to L-M 40s southward through Okeechobee and Martin counties. ISOLD-WDLY SCT light rain showers continue near coastal TAF sites north of KMLB, but could progress southward across a portion of the Treasure Coast given the coastal trough over the local coastal waters. Winds become more NWRLY on Fri as the troughing slowly translates further seaward. ISOLD to SCT rain showers associated with coastal troughing and adequate moisture. A trough over the local waters gradually strengthens and gets a nudge seaward ahead of an approaching strong cold front.
Friday will be a quick turn-around from today's weather, as upper- level ridging begins to build in over the region. Upper ridging is expected at the start of the period, as dry weather with a warm up is anticipated this weekend.
Windy conditions develop tonight and continue into early Friday as a dry cold front crosses the region. Highest gusts are expected along and just southwest of the higher terrain.
354 PM MST Thu Jan 27 2022 Current KCYS radar loop shows the band of steady snowfall moving south across Colorado early this afternoon with convective snow showers on the backside of the upper level trough. Laramie, Saratoga, and Baggs/Dixon areas across the high valleys will likely see Friday morning lows below zero. Dry and milder temperatures expected for Friday as the strong upper level ridge axis starts to nudge eastward just in time for the weekend. Valley inversions will struggle to erode west of Interstate 25, so kept highs in the mid 20s to mid 30s for the lower elevations of Carbon and Albany counties.
Arctic high pressure will continue to settle in across the east this evening. The warm air advection will result in a strong thermal gradient from east to west across the cwa on Friday with highs ranging from the upper teens in west central MN to the lower 40s in central SD.
Therefore, made some adjustments to the lows for the night along with the sky cover. Arctic high pressure will continue to settle in across the east this evening. The warm air advection will result in a strong thermal gradient from east to west across the cwa on Friday with highs ranging from the upper teens in west central MN to the lower 40s in central SD.
242 PM PST Thu Jan 27 2022 Blocking high pressure will maintain dry and generally quiet weather through the end of January. Low pressure and a cold front will bring increased winds and cooler temperatures for the start of February, but the storm track looks less favorable for bringing meaningful precipitation to the Sierra or western Nevada. A transitory ridge will set up across the region Friday with lighter winds and valley inversions prevailing.
/issued 242 PM CST Thu Jan 27 2022/ A reinforcing cold front is currently located from across mid Missouri. A potent upper trough will swing through the Mid-South on Friday. Some of the CAMS are even showing some flurries occurring across West Tennessee and Northeast Mississippi Friday afternoon as the the trough moves through.
Within the low clouds, scattered light snow showers are ongoing (again models are clueless) so basically populated low POPs tonight where there are the lower clouds. Additional snow showers have moved into the Williston area under the low level cloud cover present on satellite. At the surface, high pressure is currently pushing into the area from Saskatchewan which will aid in temperatures remaining steady through the remainder of the afternoon, if not cooling. Wind chills across this are likely to briefly approach 30 below ahead of a warm front that will move west to east overnight. Upper level ridging will then build in through the day Friday with highs reaching the upper teens to lower 20s east to near 40 southwest.
Satellite loops are showing sunny skies prevailing over the central California interior this afternoon as an amplified ridge of high pressure dominates the region. The downsloping flow should result in some warmer temperatures in the south end of the SJ Valley with a few locations possibly topping 70 degrees on Friday afternoon.
North Bend at the coast reached 31 degrees last night, but we expect temperatures to be a few degrees warmer tonight, so we haven't issued a Freeze Warning for coastal areas.
201 PM MST Thu Jan 27 2022 Current KCYS radar loop shows the band of steady snowfall moving south across Colorado early this afternoon with convective snow showers on the backside of the upper level trough. Laramie, Saratoga, and Baggs/Dixon areas across the high valleys will likely see Friday morning lows below zero. Dry and milder temperatures expected for Friday as the strong upper level ridge axis starts to nudge eastward just in time for the weekend. Valley inversions will struggle to erode west of Interstate 25, so kept highs in the mid 20s to mid 30s for the lower elevations of Carbon and Albany counties.
The remnant short wave's cloudiness has been persistent in the low levels with more moisture mid and upper level clouds pouring in from the west with a swath extending back across the Rio Grande. Our current dew points are poised for another chilly night regardless of sky with teens and low 20 for most, slightly warmer on our western most fringe from Tyler to Lufkin in the low 30s.
616 PM CST Thu Jan 27 2022 A cold front will move through overnight, resulting in scattered snow flurries and possibly a light dusting of snow, mainly north of I-70, as well as one more bitter cold day on Friday.
North and Northwest flow aloft is expected as an upper level trof departs the area to the southeast with strong ridging over the western CONUS.
531 PM CST Thu Jan 27 2022 Forecast concerns in the short term will will be exiting light wintry mix/light snow and flurries through early this evening then much colder temperatures and Water vapor satellite imagery and heights show a broad trough encompasses a large part of the central and eastern U.
A departing trough and associated cold front will move southeast out of the forecast area this evening. High pressure will settle in for the weekend with slightly warmer temperatures and clear skies.
An inch or less is forecast to the northwest of a line running roughly from Dubois to the SW corner of PA, and 1-2" (increasing from NW to SE) where light snow will be more prolonged and orographic lift contributes in the ridges. A more vigorous trough lifts northeast into the Lower Middle Atlantic. Once again, the bulk of the PVA will be further to the south with most of the production assisted by the ridges of WV and into PA.
720 PM MST Thu Jan 27 2022 Satellite imagery shows strong ridge over the PacNW and anticyclonic NW flow in our region. This will likely continue to be the case until the flow aloft becomes more westerly with the eastward shifting ridge. JKL Ridging is already starting to build into the area. As lee-side troughing continues to strengthen through the evening, these winds will continue to strengthen. Winds should help to keep temperatures across the western part of the area warmer overnight tonight and again tomorrow night.
GOES-West Water Vapor imagery reveals a high amplitude ridge is centered over the Pacific Northwest this afternoon, placing the Northern Rockies on the eastern periphery of the ridge.
After this system passes, an upper ridge builds over the Rockies, with dry weather for several days.
Radar depicts a few isolated showers just north of the border in Wyoming, but with dry surface conditions back in place across northern portions of the state, expect any rogue activity to mostly be virga over the Cheyenne Ridge. Tonight will be another chilly night under clear skies and with continued snow cover, with lows dropping into the teens and single digits in the plains, and the high valleys of North and Middle Parks lowering well into the negatives once again. For the weekend and into early week a broad area of high pressure will cover much of the Western U.
/22/ Tonight will be quiet with increasing clouds ahead of a cold front. Dew points continue to be low so precipitation isn't expected with this front, just cold temperatures!/JNE/ A very chilly airmass will continue to surge into the forecast area Friday night with temperatures dropping well into the 20s in association with a cold thermal trough forecast to swing across the area.
334 PM CST Thu Jan 27 2022 A cold front will move through overnight, resulting in scattered snow flurries and possibly a light dusting of snow, mainly north of I-70, as well as one more bitter cold day on Friday.
But a transition to more milder temperatures will pick up on Friday as high pressure begins to build over the Panhandles from the west. While the overnight lows will certainly not be on the warm side, they will be transitioning warmer in general.
It's been another day with plenty of static and chapped lips with relative humidity values in the lower 20 percent range. We will gain some moisture tonight ahead of the cold front which is currently diving out of the northern plains. Behind the front, the 500 mb trough will move through Friday afternoon through the evening.
Will maintain low POPs central and east where the lower ceilings are still expected through the overnight. Within the low clouds, scattered light snow showers are ongoing (again models are clueless) so basically populated low POPs tonight where there are the lower clouds. Additional snow showers have moved into the Williston area under the low level cloud cover present on satellite. At the surface, high pressure is currently pushing into the area from Saskatchewan which will aid in temperatures remaining steady through the remainder of the afternoon, if not cooling. Wind chills across this are likely to briefly approach 30 below ahead of a warm front that will move west to east overnight. Upper level ridging will then build in through the day Friday with highs reaching the upper teens to lower 20s east to near 40 southwest.
Current satellite imagery shows clear skies under high pressure except the Eastern Magic valley and adjacent valleys to the south of Eastern Magic valley. Currently, we are in northerly flow aloft under overall high pressure with the high pressure center over northern California. We just had a very cold air drop down into our area from a cold front yesterday.
An upper low will also be spinning off the coast of California during this time.
Expect light and variable winds at around six knots or less during the overnight periods, becoming NW at around 10-12 knots with higher gusts during the daytime hours Friday as a cold front moves across the state.
Models show a cold front moving through the middle Mississippi and lower Ohio valleys this evening into the early overnight hours, and the upper trof moving over our region on Friday. Lows tonight behind the cold front will drop from around 20 degrees north to the middle 20s southeast.
500 mb height field already shows this low pressure trough moving east of our region. Upstream from us, coming from the west, is a strong ridge of warm, high pressure.
239 PM MST Thu Jan 27 2022 Ridging is already starting to build into the area. As lee-side troughing continues to strengthen through the evening, these winds will continue to strengthen. Winds should help to keep temperatures across the western part of the area warmer overnight tonight and again tomorrow night.
Additional snow showers have moved into the Williston area under the low level cloud cover present on satellite. At the surface, high pressure is currently pushing into the area from Saskatchewan which will aid in temperatures remaining steady through the remainder of the afternoon, if not cooling. Wind chills across this are likely to briefly approach 30 below ahead of a warm front that will move west to east overnight. Upper level ridging will then build in through the day Friday with highs reaching the upper teens to lower 20s east to near 40 southwest.
319 PM CST Thu Jan 27 2022 Tonight will be quiet with increasing clouds ahead of a cold front. Dew points continue to be low so precipitation isn't expected with this front, just cold temperatures!/JNE/ A very chilly airmass will continue to surge into the forecast area Friday night with temperatures dropping well into the 20s in association with a cold thermal trough forecast to swing across the area.
The block will get nudged into NV on Fri as the cut-off low gets nudged Ewd by the upstream longer wave Pac trof. High clouds will also be rotating around the cut-off low and into Norcal Fri into Sat, but no rain is forecast. With the weaker katabatic winds and shifting of the ridge axis on Fri, max temps should trend slightly cooler over most locales. This pattern will continue through the week as high pressure remains the dominant feature. Wind gusts are mainly up to 25-35 mph with some locally higher gusts of 45+ mph near wind prone gaps, canyons, and ridgetops, and they should decrease by early tomorrow morning. A closed low is slated to move through Southern California this weekend.
1035 PM EST Thu Jan 27 2022 Currently - A weak low pressure system located northeast of the Bahamas extends a ragged trough southwestward across the Bahamas and into the Keys region. Short Term Update - The tail end of the trough will continue to weaken through the overnight period as high pressure expands southeastwards across the Gulf of Mexico. High pressure will continue spreading southeastward into the Keys area overnight as the trough near the Keys weakens further.
(Today and tonight) Patchy freezing fog will remain possible early this morning in parts of southwest Oklahoma due to lingering snow cover.
Temperatures have reached the lower to mid 40s across the region as of 28/03z and will continue to drop through the overnight hours. The remnant short wave's cloudiness has been persistent in the low levels with more moisture mid and upper level clouds pouring in from the west with a swath extending back across the Rio Grande. Our current dew points are poised for another chilly night regardless of sky with teens and low 20 for most, slightly warmer on our western most fringe from Tyler to Lufkin in the low 30s.
The exception is in the Coquille and Umpqua basins where freezing fog is beginning to form. Will need to continue to monitor to determine if freezing fog advisories will be needed, but right now cameras are not showing much in the way of reduced visibilities. We remain under the influence of high pressure, and more details about the forecast are available in the previous discussion below. North Bend at the coast reached 31 degrees last night, but we expect temperatures to be a few degrees warmer tonight, so we haven't issued a Freeze Warning for coastal areas.
The upper trough will swing through tonight/tomorrow. As this trough swings through left the flurries across the north and small chance for snow on the Plateau.
A clear sky and lighter winds will allow for rapid cooling after sunset with lows falling below freezing for nearly all locations except a few urban areas. An upper low will also be spinning off the coast of California during this time.
Freezing fog that has been affecting the Childress area seems to have dissipated as lower dew points have been advected into the region.
Overnight temperatures will take a significant dive late in the forecast as an arctic cold front crosses the region by morning. Lows will fall to the lower 20s south of I-70 ahead of the arctic front. Behind the front, much colder and drier air arrives through the day as high pressure builds in from the west. For Friday night, the high centered near the Mississippi River provides clear and dry conditions. Though winds will be relatively light under the high, expecting wind chills to drop to the -5 to -10 degree range in the north, so have continued a mention of this in the HWO.
857 PM MST Thu Jan 27 2022 A warm front is attempting to move through the area tonight. 500 mb height already shows this low pressure trough moving east of our region. Upstream from us, coming from the west, is a strong ridge of warm, high pressure.