Aikyam-Lab/Synoptic-Bench huggingface dataset:
1225 PM MST Thu Jan 6 2022 Water vapor shows upper ridge building into the Northern Rockies with plenty of mid/high clouds spilling over the ridge. At the surface, arctic high has shifted into the eastern Dakotas with lee trof deepening over MT/WY. Most areas on the SD plains remain near or below zero, but slightly warmer across parts of northeast WY and the Black Hills. Warmer air overrunning the arctic surface air may lead to some very light snow/flurries spreading east across the area this afternoon and evening, but no real accumulations expected. Warm front lifts through much of the region on Friday with thermal ridge passing overhead.
Temperatures north of I-40 have now fallen to or below freezing in the past hour. Friday will still be bitterly cold with temperatures remaining below freezing north of I-40 and low to mid 30s to the south.
/This Afternoon/ The morning sfc analysis indicates a cold front bisecting the CWA, extending from near a CLL, to OCH, to S of a 3F3, to S of MLU/TVR line as of 1630Z, or roughly along the leading stratocu line across portions of extreme Ern TX and NCntrl LA. Should see some of the low stratocu gradually erode later this afternoon, but some cigs may linger over portions of N LA/SCntrl AR and possibly the Lower Toledo Bend Country of Deep E TX tonight.
WV imagery this afternoon was showing large scale flow consisting of a broad trough migrating toward the eastern CONUS with an upstream ridge situated over the west coast.
Amounts so far have been generally light, with around a half inch near the Jay/Grove areas and closer to an inch in Pea Ridge in northern Benton county.
Arctic high pressure centered over Nebraska at midday will move southeast into Kansas this afternoon, with subsidence decreasing cloud cover and diminishing north winds trending light and variable by sunset.
151 PM CST Thu Jan 6 2022 Broad high pressure stretched from the Dakotas into the Oklahoma and Texas panhandles early this afternoon, with some weak ridging extending east into the Ohio River Valley.
These clouds are in association with a moisture rounding the periphery of a mid and upper level ridge axis over the western Caribbean. This added moisture is interacting with some mid level convergence thanks to a long wave trough moving across the central U. The Keys remain under the influence of a weakly define area of high pressure. The aforementioned mid and upper level ridge that was over the region is retreating eastward in response to the large long wave trough centered roughly over the Mississippi River Valley. This will be short lived as the previously mentioned trough will drag a decaying cold front down the spine of Florida. Thereafter a ridge will quickly build in behind, shifting winds to the northeast and freshening.
206 PM CST Thu Jan 6 2022 High pressure will build across the area tonight and remains in control of the weather through Friday. As the high build across the region, the northwest and west winds drop to around 5 mph late tonight and Friday morning.
/issued 240 AM CST Thu Jan 6 2022/ Cold air was dumping south through the Texas Panhandle early this morning as a vigorous cold front was sweeping into the Texas South Plains and Rolling Plains. Temperatures will struggle to climb back to freezing from the northern South Plains and Rolling Plains into the Panhandle during the afternoon. This will boost temperatures on the Caprock into the 60's to near 70 degrees while locations farther east will remain on the cooler side in the 50's.
A cold front has moved through all terminals with gusty, northeasterly winds in its wake. (This afternoon through Friday night) A cold front has progressed through the area bringing in cold Arctic air into the region. High temperatures are forecast stay in the upper 30s this afternoon momentarily reaching the low 40s across the Permian Basin. Areas south and west of the I10/I20 split are going to see slightly warmer temperatures as the front has only just now progressed through the area. The Arctic airmass is very shallow, therefore 850mb temps in the mountains tomorrow are forecast to be warmer then the plains.
1224 PM MST Thu Jan 6 2022 High pressure entrenched over the southwestern United States will continue to influence our local weather conditions through Friday with mostly clear skies as well as moderating temperatures.
In wake of the front temps ranged from the low/mid 20s across the n to the 35-40 near the front. A cold front has moved through all terminals with gusty, northeasterly winds in its wake. (Today through Friday afternoon) It is a bit of deja-vu this morning with a cold front moving into West Texas and eastern New Mexico. The big difference from last night is the airmass behind the front is of Arctic origin and so temperatures are already dropping into the low teens in the Texas Panhandle.
217 PM CST Thu Jan 6 2022 Subfreezing temperatures remain widespread across the region early this afternoon in the wake of the morning frontal passage, and most locations are expected to remain below freezing for the rest of the day as a dome of cold air lingers over the central plains. Upper level flow will become more zonal late tonight into tomorrow as the deep troughing responsible for our cold surge shifts eastward. A modest ripple in the 500mb flow will enhance lee- side troughing over northeastern NM tomorrow afternoon, with a corresponding increase in downslope southwesterly surface-850mb winds progged to boost temperatures into the 60s across the southwestern TX Panhandle and the far western South Plains.
Behind this feature, weak high pressure is building in across FL with 10 AM surface observations showing winds going in a clockwise direction (more southerly over the east GOMEX and more northerly toward the FL east coast). Have also added a slight chance of showers north of Orlando well after midnight and into the pre-dawn hours on Friday as there will be a slight increase in moisture and lift ahead of a weak cold front. A few showers are possible toward VRB-SUA this evening and then also north of MCO and TIX late tonight into early Friday ahead of a weak cold front, so VCSH may eventually have to be added at a site or two. Winds back from NW to W-SW today, with speeds increasing to 15 to 20 knots tonight ahead of an approaching cold front.
1138 AM CST Thu Jan 6 2022 (Today and tonight) The much advertised strong cold front will advance south across our area this morning, entering the Big Country during the predawn hours and exiting our southern counties shortly before 10 AM.
/This Afternoon/ The morning sfc analysis indicates a cold front bisecting the CWA, extending from near a CLL, to OCH, to S of a 3F3, to S of MLU/TVR line as of 1630Z, or roughly along the leading stratocu line across portions of extreme Ern TX and NCntrl LA. Should see some of the low stratocu gradually erode later this afternoon, but some cigs may linger over portions of N LA/SCntrl AR and possibly the Lower Toledo Bend Country of Deep E TX tonight. Northerly winds will be gusty at times today behind the passing cold front with gusts up to 20 kts possible and sustained winds around 10-15 kts.
As the energetic mid level wave continues east and away from the region, the last of the snow over west KY will depart late this afternoon, with decreasing clouds tonight as high pressure builds into the area. With snow, the high building in and less cloud cover, will go a bit below guidance for lows. Dry and cold weather Friday through Friday night as the high continues to move east. Ridging builds into the Midwest for the start of the weekend, lifting high temperatures closer to average.
Temperatures will continue to drop overnight, quickly freezing any moisture left on roadways. Diegan Chattanooga Airport, TN 19 34 22 49 37 / 10 0 0 0 20 Knoxville McGhee Tyson Airport, TN 16 29 17 46 31 / 60 0 0 0 20 Oak Ridge, TN 14 29 16 44 32 / 50 0 0 0 30 Tri Cities Airport, TN 14 26 12 45 27 / 80 0 0 0 10 TN.
203 PM MST Thu Jan 6 2022 Jet axis will continue to shift east of the forecast area this evening as broad ridging develops over the Western CONUS. Remnants of an AR event (currently impacting WA) rolling along the ridgetop will continue to feed these showers with ample amounts of moisture. The eastward progression of the ridge will eventually push the jet axis, as well as the moisture plume, away from the region by Friday morning. The broad ridge axis is expected to traverse across the Divide by noon, leaving the Western Slope under southwesterly flow by mid afternoon. By Friday night, the next Pacific Northwest trough will have moved inland and its upstream jet will slide over the CWA. Intensified southwest flow will return the moisture pump along an approaching cold front.
The strongest winds will be confined to the higher mountain passes.
824 PM EST Thu Jan 6 2022 Widespread snow is forecast tonight into Friday morning with passing low pressure, with heaviest snow southeast of Pittsburgh in the WV ridges. Accumulation is likely to be near or exceed 6 inches in the WV and PA Ridges, with gradually lesser amounts to the West.
855 PM CST Thu Jan 6 2022 An area of low pressure that formed over the eastern Tennessee Valley and southern Appalachians has moved further eastward, now over the west/central VA/NC border. The lower altitude clouds were heading southward from north of the Ohio River Valley to the Gulf coast. Temperatures across the area were all below freezing, ranging from 25 in Winchester to 30 at Albertville, Scottsboro and Ft Payne.
136 PM PST Thu Jan 6 2022 High pressure aloft and very weak offshore flow will bring further warming today.
653 PM EST Thu Jan 6 2022 A wide range of aviation conditions is in place this evening as a cold front settles slowly southward through the region. VFR transitions to MVFR this evening as a cold front moves slowly through the terminal region. A cold front positioned near the I-69 corridor will sag south through the remainder of the area late today into this evening. Convergence along this boundary is enhanced by the lake aggregate trough present over the Great Lakes and this should allow for a temporary flare up of lake effect snow showers during the late afternoon and early evening as this front releases south.
Sunshine can be expected as the high moves east over KY during the day Friday. Even with sunshine, the combination of snow on the ground and a cold air mass will hold highs to the low to mid 20s. While ridges will fall off in the evening, the return of warm air advection should temper the fall on ridges later in the night and allow for ridge/valley differences. The extended starts on a quiet note as ridging aloft sits situated over the region and high pressure dominates at the surface.
Friday will remain very cold as we will struggle to get above freezing in west Tennessee, eastern Arkansas and the bootheel.
A small ridge of high pressure will build and push east over southern Colorado throughout the day Friday. The Pueblo forecast area will be within the northern periphery of the ridge. Along the northern edge of the ridge, pockets of enhanced vorticity will be drifting within the overall flow. Given all of this, the overall subsidence associated with the high pressure will help to dissipate precipitation and most low to mid level clouds throughout the day for most of the area.
427 PM MST Thu Jan 6 2022 Water vapor shows upper ridge building into the Northern Rockies with plenty of mid/high clouds spilling over the ridge. At the surface, arctic high has shifted into the eastern Dakotas with lee trof deepening over MT/WY. Most areas on the SD plains remain near or below zero, but slightly warmer across parts of northeast WY and the Black Hills. Warmer air overrunning the arctic surface air may lead to some very light snow/flurries spreading east across the area this afternoon and evening, but no real accumulations expected. Warm front lifts through much of the region on Friday with thermal ridge passing overhead.
High pressure entrenched over the southwestern United States will continue to influence our local weather conditions through Friday with mostly clear skies as well as moderating temperatures.
557 PM CST Thu Jan 6 2022 (This evening through Friday) The cold front has moved through the entire area this afternoon, bringing gusty north winds, and much colder temperatures.
/28/ Tonight through Friday: Strong cold advection will be the primary concern in the near term forecast with the freezing line currently approaching the Highway 82 corridor, and the drizzle is ending just in time in that area. Sunny skies Friday and diminishing wind should help make things a little more comfortable, but it will remain quite chilly with temperatures struggling to reach the lower to mid 40s north and the lower 50s far south. This will allow warmer southerlies to begin transporting in moisture from the Gulf of Mexico. Further south and west, temperatures will be near freezing along I- 20 and mid and upper 30s further south.
548 PM CST Thu Jan 6 2022 High pressure will build across the area tonight and remains in control of the weather through Friday. As the high build across the region, the northwest and west winds drop to around 5 mph late tonight and Friday morning.
Warmer temperatures are expected tonight in the east and areawide Friday.
351 PM MST Thu Jan 6 2022 High pressure will build into the area later today and tonight, bringing a gradual end to precipitation across northern Utah.
Sunshine can be expected as the high moves east over KY during the day Friday. Even with sunshine, the combination of snow on the ground and a cold air mass will hold highs to the low to mid 20s. While ridges will fall off in the evening, the return of warm air advection should temper the fall on ridges later in the night and allow for ridge/valley differences.
A broad ridge will bring warmer afternoons to end the week. This will buckle into a zonal flow and then gain some weak trough inflection as a system passes north of us over the weekend. That, combined with a weakness in the flow at the base of the ridge will bring variable cloudiness, and several degrees of cooling to start the new week.
Jet axis will continue to shift east of the forecast area this evening as broad ridging develops over the Western CONUS. Remnants of an AR event (currently impacting WA) rolling along the ridgetop will continue to feed these showers with ample amounts of moisture. The eastward progression of the ridge will eventually push the jet axis, as well as the moisture plume, away from the region by Friday morning. The broad ridge axis is expected to traverse across the Divide by noon, leaving the Western Slope under southwesterly flow by mid afternoon. By Friday night, the next Pacific Northwest trough will have moved inland and its upstream jet will slide over the CWA. Intensified southwest flow will return the moisture pump along an approaching cold front.
Light rain and drizzle this evening will transition to heavier precipitation tonight into Friday morning as a cold front moves east across the region.
/issued 217 PM CST Thu Jan 6 2022/ Subfreezing temperatures remain widespread across the region early this afternoon in the wake of the morning frontal passage, and most locations are expected to remain below freezing for the rest of the day as a dome of cold air lingers over the central plains. Upper level flow will become more zonal late tonight into tomorrow as the deep troughing responsible for our cold surge shifts eastward. A modest ripple in the 500mb flow will enhance lee- side troughing over northeastern NM tomorrow afternoon, with a corresponding increase in downslope southwesterly surface-850mb winds progged to boost temperatures into the 60s across the southwestern TX Panhandle and the far western South Plains.
458 PM MST Thu Jan 6 2022 Jet axis will continue to shift east of the forecast area this evening as broad ridging develops over the Western CONUS. Remnants of an AR event (currently impacting WA) rolling along the ridgetop will continue to feed these showers with ample amounts of moisture. The eastward progression of the ridge will eventually push the jet axis, as well as the moisture plume, away from the region by Friday morning. The broad ridge axis is expected to traverse across the Divide by noon, leaving the Western Slope under southwesterly flow by mid afternoon. By Friday night, the next Pacific Northwest trough will have moved inland and its upstream jet will slide over the CWA. Intensified southwest flow will return the moisture pump along an approaching cold front.
(This afternoon through Friday night) A cold front has progressed through the area bringing in cold Arctic air into the region. High temperatures are forecast stay in the upper 30s this afternoon momentarily reaching the low 40s across the Permian Basin. Areas south and west of the I10/I20 split are going to see slightly warmer temperatures as the front has only just now progressed through the area. The Arctic airmass is very shallow, therefore 850mb temps in the mountains tomorrow are forecast to be warmer then the plains.
Broad high pressure stretched from the Dakotas into the Oklahoma and Texas panhandles early this afternoon, with some weak ridging extending east into the Ohio River Valley.
537 PM CST Thu Jan 6 2022 We've hit rock bottom and the rest of the week will be warmer with the warm air advection beginning tonight.
Had originally expected a Wind Chill Advisory to be needed overnight tonight into Friday morning, but most recent guidance has trended warmer with less wind over the next 24 hours. Temperatures will warm on Friday as the upper ridge over the western U.
The mid level flow will transition to moderate ridging across the region through Friday night. This is due to the strong southwesterly winds ahead of the approaching cold front that will move through the area by mid day.
Zooming out to the southeast regional view, a weak cold front is soon to approach the FL Panhandle and should reach northern portions of the forecast area by daybreak. Due to increasing moisture from the upper disturbance moving across the state from the west as well as this cold front, extensive low stratus is anticipated prior to sunrise, starting as early as midnight for interior locations. A weak cold front will shift closer to the local area tonight, and as moisture increases ahead of the boundary, so will the potential for low stratus development. Additional showers are likely as the cold front moves southeast down the peninsula, but coverage looks too low to include at this time. Winds will veer to the southwest and eventually west as a cold front approaches the waters from the north.
343 PM CST Thu Jan 6 2022 We've hit rock bottom and the rest of the week will be warmer with the warm air advection beginning tonight.
As cold front moves towards region, LLWS affects BDN/RDM/PDT/PSC. Cold front brings stronger winds tomorrow, with S-SW'ly wind gusts exceeding 25-35kts all sites.
Low precip chances creep into Mohave county later in the period as a cut-off low tries to draw moisture northward.
Temps will dip back down to freezing or below for most areas across north and central GA tonight. With high pressure building in across the region expecting dry conditions Today and Saturday.
Overnight, an upper level ridge moves over the central CONUS which turns winds out of the south encouraging slightly warmer temperatures as the weekend approaches. Friday highs remain below freezing; however, an upper level trough off the northern Rockies accelerates a low level jet which advects substantial amounts of warm air and moisture pushing highs on Saturday into the mid-40s. A cold front moves through Saturday evening which brings a chance for rain across central and eastern MO.
By Saturday morning, slightly cooler airmass will be in place with most of only dropping a few degrees. A broad area of high pressure will be building during this time bringing afternoon highs to the low to mid 80s through the weekend.
The Arctic airmass will mostly exit the area today as a 250mb ridge axis moves over the Rocky Mountains. Tomorrow will see the arrival of another much weaker cold front as the upper ridge breaks down. Temperatures should fall into the low 20s (perhaps a few teens) going into tomorrow night as a secondary surge of cold air arrives. An upper level trough does advance through the area tomorrow night bringing with it some Pacific moisture which will enhance mid and upper level clouds.
318 AM EST Fri Jan 7 2022 Cold air remains in place today with light snow showers downwind of Lake Erie and the ridges of West Virginia. The same goes for the ridges with upslope flow. Subsidence and crossing high pressure will return dry weather to the region Friday night into Saturday.
An area of low pressure that formed over the eastern Tennessee Valley and southern Appalachians has moved further eastward, now over the west/central VA/NC border. The lower altitude clouds were heading southward from north of the Ohio River Valley to the Gulf coast. Temperatures across the area were all below freezing, ranging from 25 in Winchester to 30 at Albertville, Scottsboro and Ft Payne. A high pressure cell will drop into IL and KY Friday afternoon and then east into the mid Atlantic states by Saturday morning. Highs will only reach the lower to middle 30s Friday afternoon (upper 20s atop the Cumberland Plateau areas). Southerly flow will develop Friday night, so Saturday morning lows will be in the upper teens to around 20 in southern TN to the lower 20S in north AL.
Cold air with 850 hPa temperatures in the lower single digits to the east versus downslope warmed air with temperatures in the upper singles to around 10C in the west. In addition, westerly flow aloft perpendicular to the the Rockies will allow for the deepening of the High Plains lee trough through the day. On Saturday, a trof axis will move across the state.
As the energetic mid level wave continues east and away from the region, the last of the snow over west KY will depart late this afternoon, with decreasing clouds tonight as high pressure builds into the area. With snow, the high building in and less cloud cover, will go a bit below guidance for lows. Dry and cold weather Friday through Friday night as the high continues to move east. Ridging builds into the Midwest for the start of the weekend, lifting high temperatures closer to average. Rain could arrive for the afternoon hours on Saturday west of the Ohio/Wabash, then rain becomes widespread overnight as low pressure moving across the Central Plains becomes invigorated by the moisture.
1045 PM CST Thu Jan 6 2022 (This evening through Friday) The cold front has moved through the entire area this afternoon, bringing gusty north winds, and much colder temperatures.
The winds will stay up and will aid in keeping overnight temperatures Friday night warmer than the past few nights and many locations may see temperatures rise toward morning.
1042 PM CST Thu Jan 6 2022 Northerly winds remain elevated this evening behind an earlier cold front, with gusts up around 20 kts continuing a bit later than usual as a result althoug this should be ending shortly. The cold front has cleared all but the southwest CWA mid afternoon. Low temperatures Friday morning are forecast to be in the low to mid 20s through the Hill Country and upper 20s to low 30s elsewhere. The low level warm air advection pattern is forecast to strengthen Friday night. Some deeper convection in the form of isolated to scattered showers is possible across central and eastern areas of the CWA overnight, rooted just above the very shallow, cool boundary layer to the north a warm front.
The pressure gradient will be increased between the exiting high and elongated area of low pressure nearing from MT, with winds becoming breezy out of the southeast this afternoon. Looks like the longwave pattern will be dominated by an amplifying upstream ridge through the extended.