Aikyam-Lab/Synoptic-Bench huggingface dataset:
503 PM MST Fri Jan 22 2021 The latest couple runs of the high resolution models are showing a decent potential for advisory snow amounts across Sweetwater County occurring especially during the day Saturday. H5 trough continues to drop southward along the northern California Coast, with energy break out ahead of it currently across the western mountains. The leading edge of the main trough moves into NV/UT tonight, drawing the precip southward into the Wyoming and Salt ranges, before spreading east across southern and central WY later tonight. A weak cold front pushes the activity back to the south Saturday night, with temperatures falling into the single digits for northern and central WY Saturday night.
The low stratus deck is expected to return later tonight with continued IFR/LIFR conditions on the Caprock. /issued 221 PM CST Fri Jan 22 2021/ Upper level flow will become increasingly southwesterly over the next 24 hours as an upper low digs into SRN California. There is a risk some of the drizzle could freeze on elevated surfaces across the southwestern panhandle where temperatures may drop to just below freezing. A positively tilted upper low will be located across southern California by late tomorrow evening.
Will see a wind shift with a weak cold front dropping through the area overnight. Chambers While one weather system sits over Manitoba and keeps a cooler northwest flow aloft over the region a second area of unsettled weather will move across Wyoming this weekend. Temperatures will be close to normal for this time of year but lows in the teens and highs around 30 will feel cold since recent weather has been much warmer.
But, warm front begins moving back inland after 20z or so, bring with it the typical -ra/dz/br/fg. Temperatures Saturday will be a little cooler (weak CAA ending/clouds) but then the front moves back north out of the waters going into late Saturday afternoon and evening. Rain threat increases with the increased upglide and warm front proximity as a weak s/w embedded in the subtropical jet slides into the area.
The region will be under the influence of cold, continental high pressure overnight, with clear to mostly-clear sky conditions. The center of high pressure will slide eastward, well to our north across the southern Great Lakes/OH Vally region. Thus, we will remain on its periphery along a tighter pressure gradient between the high and a trough of low pressure along the Gulf Coast. Temperatures will be chilly, as CAA is poised to enter the area in the low-levels tonight, with expected values mainly in the mid/upr 20s by daybreak Saturday. But, amidst the abundant sunshine, temperatures are expected to be in the low/mid 50s Saturday afternoon.
Rain and cooler temperatures will be briefly interrupted Saturday.
750 PM CST Fri Jan 22 2021 Tranquil weather across the Tennessee Valley this evening, with high pressure centered over the Upper-Midwest continuing to build south into the region. But, amidst the abundant sunshine, temperatures are expected to be in the low/mid 50s Saturday afternoon.
503 PM CST Fri Jan 22 2021 (This evening through Saturday) A cold front was stalled across the area this afternoon, roughly near a line from Sterling City to San Angelo to Brady, as of 1 PM. The cold front will continue to move south tonight through the rest of the area, with the low clouds and fog following behind. For Saturday, have trended temperatures cooler across the area with the potential for the low clouds to hang around most of the day, slowing warming.
851 PM EST Fri Jan 22 2021 Cooler temperatures expected today along with scattered snow showers through Saturday morning with the passing of a cold front. With no building inversion due to strong cold advection overnight, expect pre-dawn wind chills to remain in the single digits in the lower elevations/below zero in the ridges, with little recovery Saturday.
953 PM EST Fri Jan 22 2021 Building high pressure will bring a drying and cooling trend into the weekend.
604 PM CST Fri Jan 22 2021 High pressure over the upper Midwest will slide southeast tonight and become centered over Ohio by 18z Saturday. Could be a period of light freezing rain over southern IL into southwest IN.
But, warm front begins moving back inland after 20z or so, bringing with it the typical -ra/dz/br/fg/low cigs into Sat night.
1047 PM MST Fri Jan 22 2021 Water vapor shows upper low over northern Manitoba, with next embedded short wave diving southeast across southern SASK. Nearly cut-off low is along the CA coast. Inverted trof associated with CO surface will nose into our southern overnight into Saturday.
1005 PM CST Fri Jan 22 2021 Cold high pressure has kept temperatures in the single digits and teens early this afternoon, with mostly sunny skies. A quiet evening and overnight are on tap thanks to high pressure meandering through. Given this setup, have maintained forecast lows on the cooler side of guidance.
Fog is a small possibility as the open Fort Peck Lake will add moisture to the cooler valleys overnight.
Winds will turn northwest tonight and increase to roughly 10 to 15 mph, preventing the formation of dense fog across the lower valleys. Moisture advected from the low pressure system over central California is beginning to move north across the Nevada border into the southern highlands of Idaho.
255 AM EST Sat Jan 23 2021 High pressure will continue its approach from the upper Mississippi Valley today, eventually passing overhead late tonight.
1109 PM CST Fri Jan 22 2021 High pressure over the upper Midwest will slide southeast tonight and become centered over Ohio by 18z Saturday. Could be a period of light freezing rain over southern IL into southwest IN.
1020 PM CST Fri Jan 22 2021 (This evening through Saturday) A cold front was stalled across the area this afternoon, roughly near a line from Sterling City to San Angelo to Brady, as of 1 PM. The cold front will continue to move south tonight through the rest of the area, with the low clouds and fog following behind. For Saturday, have trended temperatures cooler across the area with the potential for the low clouds to hang around most of the day, slowing warming.
Temperatures tonight are trending 5 to 10 degrees cooler than 24 hours ago as northerly wind continues to usher in drier air across the region. With clear skies and guidance still hinting at a shallow layer of moisture across portions of the southern Sound, could see some areas of freezing fog develop overnight.
1033 PM EST Fri Jan 22 2021 Currently - A narrow ridge extends across the Bahamas and the Florida Keys resulting in light breezes. Deep layered ridging remains in place with a healthy subsidence inversion based around 920 mb. Temperatures are currently in the 65 to 70 degree range with dew points in the lower to mid 60s. Short Term Update - The narrow ridging will remain near the island chain through the overnight period, resulting in light winds tending northeasterly for most island locations. This along with clear skies will allow for radiational cooling broadly down into the lower 60s with some interior protected locations seeing possibly upper 50s. A ridge across Keys waters will keep winds quite light and primarily out of the northern half of the compass.
Cold front has now moved well south of the forecast area. Dew points have already dropped into the lower 20s northern sections too. Will take several more hours for dew points in the south and east to lower into the lower to mid 20s. Garuckas Chattanooga Airport, TN 50 34 51 45 66 / 0 0 50 90 100 Knoxville McGhee Tyson Airport, TN 47 29 52 43 62 / 0 0 40 90 100 Oak Ridge, TN 46 29 51 43 62 / 0 0 40 90 100 Tri Cities Airport, TN 42 25 50 40 57 / 0 0 20 70 100.
937 PM MST Fri Jan 22 2021 The latest couple runs of the high resolution models are showing a decent potential for advisory snow amounts across Sweetwater County occurring especially during the day Saturday. H5 trough continues to drop southward along the northern California Coast, with energy break out ahead of it currently across the western mountains. The leading edge of the main trough moves into NV/UT tonight, drawing the precip southward into the Wyoming and Salt ranges, before spreading east across southern and central WY later tonight. A weak cold front pushes the activity back to the south Saturday night, with temperatures falling into the single digits for northern and central WY Saturday night.
Fairly quick zonal pattern aloft over much of the CONUS, with a closed low over CA/NV. Temperatures early this morning were in the low 20s to around 30 degrees with dewpoints in the single digits to teens. Highs today should reach the low to mid 40s in the eastern Ozarks and the upper 40s to around 50 out west. Lows tonight will be around freezing to the mid 30s in the eastern Ozarks to the upper 30s to around 40 in the west.
The highest chances of encountering any fog will be interior locations west of I-95. The highest chance for fog development continues to be KLEE, where a TEMPO group for IFR CIGs/VIS has been maintained after 10Z. A weak cold front progressing southward along the Florida peninsula will reach the northern east-central Florida Atlantic waters by sunrise.
903 PM CST Fri Jan 22 2021 Skies are mostly clear this evening with temperatures ranging from the low 30s to mid 40s. /issued 253 PM CST Fri Jan 22 2021/ High pressure is currently sitting over the area.
/issued 221 PM CST Fri Jan 22 2021/ Upper level flow will become increasingly southwesterly over the next 24 hours as an upper low digs into SRN California. There is a risk some of the drizzle could freeze on elevated surfaces across the southwestern panhandle where temperatures may drop to just below freezing. A positively tilted upper low will be located across southern California by late tomorrow evening.
Tranquil weather across the Tennessee Valley this evening, with high pressure centered over the Upper-Midwest continuing to build south into the region. But, amidst the abundant sunshine, temperatures are expected to be in the low/mid 50s Saturday afternoon.
344 AM EST Sat Jan 23 2021 Cold front continues to push south of the area as high pressure bridges across the Ohio valley but a wide expanse to affect the local area. Low level moisture has been slow to scour out across far southeastern sections and consequently, the arrival of the cooler air has resulted in dense fog conditions. Although overall it will be a slightly cooler airmass, full sun today will allow for temperatures to rise into the upper 50s to lower 60s. Went with the lower MAV/MET blend for the dewpoints and we therefore get close to Fire Danger for the northern tier.
1058 PM EST Fri Jan 22 2021 A low amplitude upper level trough will swing through the region tonight and Saturday, then high pressure will build into the state during the second half of the weekend.
Satellite imagery shows a dynamic low over the Great Basin, strong ridge off the Pacific coast, and a cold upper low over northern Saskatchewan.
1230 AM EST Sat Jan 23 2021 Building high pressure will bring a drying and cooling trend this weekend.
1055 PM EST Fri Jan 22 2021 A low amplitude upper level trough will swing through the region tonight and Saturday, then high pressure will build into the state during the second half of the weekend.
400 AM EST Sat Jan 23 2021 The upper level pattern features a seasonably deep upper level low across the California/Nevada border, as well as central Canada. A somewhat weaker upper level low is also churning near southeast Quebec. Broader ridging is found from the Northern Rockies down through the Southern Plains, with mainly zonal flow seen across the majority of the Mississippi Valley and points east. At the surface, high pressure is centered near central Illinois, with broad low pressure situated across the Central Great Basin/Rockies.
As the mid level ridging exits east of the region after midnight tonight, both upper lows and associated lower sfc pressure will be pushing eastward, resulting in increasing DPVA across the mid/upper Mississippi valley and Great Lakes.
Opted to keep most sites on the low end of MVFR at the end of the period with the PROB30 with KMLC standing the best chance to see IFR conditions within rain activity.
/issued 903 PM CST Fri Jan 22 2021/ Skies are mostly clear this evening with temperatures ranging from the low 30s to mid 40s. /issued 253 PM CST Fri Jan 22 2021/ High pressure is currently sitting over the area.
The story for the next few days is a building deep layer ridge bringing unseasonably warm temperatures inland with seasonable temperatures near the coast because of the seabreeze.
Included a mention of sprinkles early this mrng as drier air in the low lvls conts to advect Swd. On Sun, the upper flow pattern rmns progged to transition to the SW as an upr trof wl be lifting out of the Swrn states towards Wrn TX.
Cold front has moved across our area with weak isentropic lift developing a stratus layer within a few hours of its passage. Then, isentropic lift increases this weekend along with a deepening of moisture plus the front moves back north as a warm front as an upper level trough moves from California to along the Arizona/New Mexico region on Sunday. A strong capping inversion, anti-cyclonic flow aloft, and extensive cloudiness will inhibit thunderstorms until late Sunday afternoon at the earliest due to warmer surface temperatures near peak heating and some thinning of the stratus. The overcast skies keep high temperatures cooler than the blended guidance, although within a degree or two of normal today. Temperatures remain near steady or slowly rise tonight as the warm front moves north leading to well above normal temperatures on Sunday.
334 AM CST Sat Jan 23 2021 Will have an active upper pattern this week as a series of upper troughs move across the area. The first upper trough moving down through CA this morning will develop into a cut off low that swings along the US/Mex border Sunday before weakening and tracking into the area later that night.
A weak surface front currently extends over the outer coastal waters this morning where it is expected to meander through most of the day before lifting north as a warm front this evening into Sunday.
534 AM CST Sat Jan 23 2021 Light snow and freezing rain will spread across central and southeast Illinois overnight, before diminishing to drizzle on Sunday.
/issued 334 AM CST Sat Jan 23 2021/ Will have an active upper pattern this week as a series of upper troughs move across the area. The first upper trough moving down through CA this morning will develop into a cut off low that swings along the US/Mex border Sunday before weakening and tracking into the area later that night.
/Issued 623 AM EST Sat Jan 23 2021/ Cold front continues to push south of the area as high pressure bridges across the Ohio valley but a wide expanse to affect the local area. Low level moisture has been slow to scour out across far southeastern sections and consequently, the arrival of the cooler air has resulted in dense fog conditions. Although overall it will be a slightly cooler airmass, full sun today will allow for temperatures to rise into the upper 50s to lower 60s. Went with the lower MAV/MET blend for the dewpoints and we therefore get close to Fire Danger for the northern tier. Deese A warm front will be lifting northward across the forecast area at the start of the forecast period Sunday night as the parent low tracks northeastward across the Southern Plains.
Return flow on the back side of cool high pressure will continue today. A cold front will sag south tonight through southwestern Kansas, with a wind shift to the north at 10-13 kts. Some drizzle may occur in central Kansas tonight, changing to freezing drizzle.
An elongated area of low pressure with centers north of the International Border and well south will aid in producing lift along with the warm air advection and an upper trough. Forecast soundings have warmed slightly with less of the lower to mid moist layer in the max dendritic growth zone compared to 24 hours ago. This gives lower confidence in the higher snow totals. High pressure will build into the region Sunday night and temperatures are expected to drop well below zero over northern Minnesota.
High res models like the NAM, HRRR, and RUC show the low clouds holding on all day and tonight, as low level moisture above the boundary begins to spread north across the area. Will stay on the cooler side of guidance and keep highs in the 50s.
Ridging aloft will also favor above normal temperatures during this time. Strong high pressure centered over the upper Midwest will build into the forecast today.
This will lead to breezy southwesterly winds which will lead to drier air moving into the region and hence an erosion of the low clouds from west to east through the day. /WCI An energetic upper level low pressure trough currently along the central California coast will open Sunday, but remain a fairly sharp trough, before it kicks across the southern high plains Sunday night.
/19/ Zonal flow aloft continues across the Lower Mississippi River Valley as we begin the weekend. In the wake of this front, high pressure centered well to our north, is wedged in place across the CWA. This is resulting in a slightly cooler drier airmass over us. While most of the CWA will remain dry today, isentropic upglide increasing in the lower levels of the atmosphere & over the stalled boundary, will maintain a good bit of cloud cover across the forecast area today. As far as temperatures are concerned, highs today will range from the lower 50s to lower 60s. A warm front just south of the state Sunday will lift back north shifting winds more out of the south which will not only increase moisture in the atmosphere but also temperatures will warm feeding any CAPE(energy) in the atmosphere.
The 'bad' news is that it looks like the GFS won out as the largest mass of clouds and coldest cloud tops did end up forming around the low pressure to our west. Having said that, hi-res guidance and deterministic short range models are still sticking to their guns with heavier precip continuing through midafternoon for the higher elevations of Utah and Colorado. Temps are the tricky bit as they'll be right around freezing through the day. If this trend continues, and it should as the low tracks into our CWA providing more lift, there's no reason for the precip to stop. By 00Z, the low/trough that caused the initial push of snow sort of washes out over Wyoming and the High Plains.
Fairly quick zonal pattern aloft over much of the CONUS, with a closed low over CA/NV. Temperatures early this morning were in the low 20s to around 30 degrees with dewpoints in the single digits to teens. Highs today should reach the low to mid 40s in the eastern Ozarks and the upper 40s to around 50 out west. Lows tonight will be around freezing to the mid 30s in the eastern Ozarks to the upper 30s to around 40 in the west. The upper trough will track eastward across the central and southern Rockies on Sunday with a frontal boundary extending northeast into the area. Most of the area should be in the warmer air and lows Sunday night should be from the upper 30s to mid 40s.
Temperatures range from the lower to mid 60s in exposed/coastal locations to near 60 at the Key West office and Marathon. These cooler spots are likely seeing a good amount of ground condensation (like the office in Key West is) with ground fog probably occurring across portions of Big Pine Key and other significantly cooled locations (as the dew points are in the lower to mid 60s in most places, driven down to the mid 50s at Big Pine and forced to condensate).
Mostly driven by an inverted trough off a Colorado low, the snow will get some additional lift across east central SD from a mid level trough dripping down out of North Dakota. However, as Canadian high pressure builds in from the north-northwest today, there will be a sharp dry air intrusion that will help keep places northwest of a line from Aberdeen to Pierre with little to no snow. So, snow amounts across the forecast area will range from 0 to 4 inches with highest amounts falling under the mid level trough in the east.
/issued 356 AM CST Sat Jan 23 2021/ SHORT TERM (Now through Sunday): Mid-level ridging will move eastward over the Plains this evening as a longwave trough and developing closed low dig in over the western United States. The eastward progression of this high will allow for a stationary front currently located near the Gulf Coast to lift northward, acting as a warm front. Low pressure will then develop over northeastern Mexico on Sunday and move northeastward along with the aforementioned warm front.
A trough of low pressure will deepen over California Sunday night.
247 AM MST Sat Jan 23 2021 Current surface map places low across Colorado, with weak inverted trof into western South Dakota.
426 AM MST Sat Jan 23 2021 High pressure continues to push east towards the Great Lakes with a slow moving weather system crossing the Intermountain region through Saturday. Temperatures will be much cooler Sunday with highs in the low to mid 30s east of Laramie, and in the 20s to the west.
SHORT TERM (Now through Sunday): Mid-level ridging will move eastward over the Plains this evening as a longwave trough and developing closed low dig in over the western United States. The eastward progression of this high will allow for a stationary front currently located near the Gulf Coast to lift northward, acting as a warm front. Low pressure will then develop over northeastern Mexico on Sunday and move northeastward along with the aforementioned warm front.
The low level wind and pressure fields show a cold front and upslope flow to move into the plains late this afternoon. For temperatures, today's highs look to be a tad warmer than yesterday's readings. The cold front that moves in late in the day, does not look to bring in significantly colder air for tonight. Southwest flow aloft will prevail Sunday ahead of an ejecting trough near the Grand Canyon. Could see some fog and patchy freezing drizzle along/near the base of the foothills. Chances for freezing drizzle will be low, but not zero. The threat for the freezing drizzle should end by mid morning. Snow showers will be possible in the afternoon and evening across the central mountains ahead of the upper level trough.
Deep upper level low resides over central Canada, with several waves rotating around this feature. This feature will drive a cold front through the Northern Plains today, and will bring a chance of snow within an area of low/mid clouds to northern areas of the state. Coldest temperatures of the season so far tonight, with lows ranging from 10-15 below north to the lower single digits south.
Conditions will begin to improve later this morning, but a weak cold front drifting south into the region will lead to abundant clouds and chance of showers from around the Interstate 4 corridor northward. The story for the next few days is a building deep layer ridge bringing unseasonably warm temperatures inland with seasonable temperatures near the coast because of the seabreeze.
417 AM MST Sat Jan 23 2021 Current surface map places low across Colorado, with weak inverted trof into western South Dakota.
Near the surface, an area of low pressure is strengthening in eastern Colorado. Return flow on the back side of cool high pressure will continue today. A cold front will sag south tonight through southwestern Kansas, with a wind shift to the north at 10-13 kts. Some drizzle may occur in central Kansas tonight, changing to freezing drizzle.
700 AM EST Sat Jan 23 2021 High pressure will continue its approach from the upper Mississippi Valley today, eventually passing overhead late tonight.
After a review of area sounding profiles, have trimmed back the threat of freezing drizzle. Deep troughing becomes established across the western CONUS.
Otherwise, high clouds will be on the increase today ahead of the next weather system over eastern Colorado, as an associated warm front develops along I-70 corridor and lifts northward tonight. It will start out as a mixture of light rain, freezing rain, sleet, and snow but then transition to mostly rain before tapering off and exiting forecast area by midday Sunday.