Aikyam-Lab/Synoptic-Bench huggingface dataset:
820 PM CST Sun Jan 31 2021 Patchy freezing drizzle is being reported at some MNDOT RWIS sites as well as some UP at AWOS's from ELy to Cloquet. The freezing drizzle is lined up with a dry slot seen on water vapor imagery moving through the area ahead of an upper level trof moving through the western third of the forecast area at this moment. Have added freezing drizzle over northwest Wisconsin as well as the Arrowhead for the next few hours to align with the passage of the dry slot.
622 PM EST Sun Jan 31 2021 Light snow and some patchy freezing drizzle will taper off later tonight. Upper level ridging will start to slide in Tues into Thurs ahead of the next system we will be watching.
The west is already sunny and the temperatures are a little warmer than in the east. Temperatures warming to around or just above freezing have melted a little snow and there is plenty of low level moisture. The low clouds moving out will get out of the area this afternoon/evening, but are near enough that fog could form.
Tonight and Monday: As an upper level low pivots through the Midwest today, a front is currently moving through our region with a rush of colder and drier air behind it. The tight pressure gradient between the low over the Ohio River Valley and here is resulting in windy conditions throughout the area. As the low and upper trough continues to pivot through the region, conditions will remain windy overnight and through the day on Monday.
VFR conditions are expected to continue for the TAF sites over the next couple of hours as the cold front affecting the region continues pushing east. An upper level ridge over the eastern Conus shifts east in response. A cold front has begun to move over northwestern portions of the forecast area late this afternoon. Helping to modify the instability, and lessen the already small chance of any strong to severe storms, is drier air moving over the forecast area ahead of the approaching cold front. Have went on the high side of guidance for tonight's low temperatures.
324 PM CST Sun Jan 31 2021 Cool and dry gusty northwest flow today behind the departing cold front.
539 PM CST Sun Jan 31 2021 Moisture continues to rotate around a departing area of low pressure currently located over the southern Great lakes.
1157 PM EST Sun Jan 31 2021 Light snow and some patchy freezing drizzle will taper off later tonight. Upper level ridging will start to slide in Tues into Thurs ahead of the next system we will be watching.
Overall rates have been on the light side outside of some localized banding, but we're starting to see accumulations in areas where temperatures have dropped to or below the freezing mark. Quiet wx expected Tue-Wed under sfc and upper ridging.
1046 PM MST Sun Jan 31 2021 Sunny skies continue over all of eastern Utah and western Colorado this Sunday afternoon thanks to a ridge of high pressure moving through the Rocky Mountain states. This ridge will shift eastward this evening and overnight, allowing for height falls aloft and thus some cirrus cloud cover to spill eastward. Forecast guidance had been hinting at the potential for some very light snow in the highest elevations of the San Juans on Monday afternoon and evening as the column saturates in the mid and upper levels. Overnight lows will run around 5 to 8 degrees warmer on Monday night given early cloud cover.
1030 PM CST Sun Jan 31 2021 VFR and light northerly winds will continue through Monday as broad high pressure moves closer. This morning's cold front is well south of the area and is currently pushing towards the Central Gulf. Highs will be a bit cooler tomorrow as CAA continues with temps in the upper 60s to near 70 degrees.
High temperatures for the day are expected to reach into the lower to mid 50s for southeast Georgia and in the mid 50s and lower 60s for northeast Florida. Overnight low temperatures will drop into the lower 30s, however frost developments are not expected due to the high wind speeds.
1032 PM MST Sun Jan 31 2021 An upper level ridge will be over the area today and tonight.
This is occurring on the west side of the upper low circulation, which will be moving east today, as the major low pressure impacts the eastern seaboard. MVFR (under 3000 ft based) clouds are found all the way north into Canada in this current flow around the west side of the upper low, and that is bringing cloud skies all the way west over top of the ridge axis. The clouds will result in a narrow diurnal temperature forecast today, with highs in the upper 20s to lower 30s, which is only a degree or two warmer than current 2 AM readings.
The lowest cigs/vsbys will be in the 06Z to 12Z period at BNA, MQY and CKV. Cold gusty northwest winds tonight and Monday behind a cold front that moved through the midstate earlier today.
1027 PM EST Sun Jan 31 2021 Low pressure will lift northward tonight as the upper level trough and additional showers cross the area Monday.
1011 PM CST Sun Jan 31 2021 High pressure will continue to settle over the region in the forecast period.
958 PM MST Sun Jan 31 2021 06Z TAF CYCLE Dirty ridge over NM. Surface lee trough developing by 12Z. Thin, high clouds will begin increasing overnight, resulting in slightly warmer low temperatures compared to last night. The high clouds will thicken during the day Monday, making it feel similar to today despite highs being several degrees warmer.
1249 AM EST Mon Feb 1 2021 Ahead of an approaching cold front, showers and thunderstorms remain an issue for area terminals.
This evening through Monday night Tranquil weather continues through the next 36 hours, as the H5 trough remains steady across the Rockies.
In addition, a spoke of vort energy rotates around the upper low to our north and moves across our area late tonight/early Monday. Diegan Chattanooga Airport, TN 39 29 42 27 50 / 20 10 0 0 0 Knoxville McGhee Tyson Airport, TN 35 29 38 24 42 / 50 50 20 0 0 Oak Ridge, TN 36 28 39 24 45 / 40 30 10 0 0 Tri Cities Airport, TN 35 26 34 20 39 / 60 60 20 0 0 TN.
1137 PM CST Sun Jan 31 2021 Stratus lingering across our area continues to inhibit radiational cooling for many locations, though a few "holes" in the low clouds have allowed temps to drop to the single digits (mainly in the northern RRV). However, where stratus persists overnight lows are more likely to remain in the teens or even the lower 20s (similar to last night). Winds will slowly shift, becoming southerly late in the day ahead of an approaching H5 ridge. The ridging to our west will be the source of warmer temperatures for Monday night, with lows falling into the teens. Impacts and concerns in the extended will stem from upper ridge to start the period with above normal temps then with the trough passage an arctic push of air and associated precip.
944 PM CST Sun Jan 31 2021 Stratus lingering across our area continues to inhibit radiational cooling for many locations, though a few "holes" in the low clouds have allowed temps to drop to the single digits (mainly in the northern RRV). However, where stratus persists overnight lows are more likely to remain in the teens or even the lower 20s (similar to last night). Winds will slowly shift, becoming southerly late in the day ahead of an approaching H5 ridge. The ridging to our west will be the source of warmer temperatures for Monday night, with lows falling into the teens. Impacts and concerns in the extended will stem from upper ridge to start the period with above normal temps then with the trough passage an arctic push of air and associated precip.
Temperatures will remain on the cool side however, with highs in the lower 60s. Tonight, lows are again expected in the lower to mid 30s.
924 PM CST Sun Jan 31 2021 Skies are clear areawide this evening in the wake of a departing cold front. The gradient between this front and an elongated high pressure over the plains will keep winds elevated overnight and through a majority of the day tomorrow before decreasing tomorrow evening. /issued 324 PM CST Sun Jan 31 2021/ Cool and dry gusty northwest flow today behind the departing cold front.
Temperatures ranged from the lower 20s to lower 30s. 00z models are in good agreement that an upper level ridge will build east across the area. As a result, the low level moisture will likely remain across the area. With the 925 and 850 mb ridge axis remaining to our west through tonight, kept the low clouds across the area. Due to these clouds, there was some concern that the NBM was too cold, so raised the low temperatures tonight.
Surface pressure does fall today, but there is still the influence of surface ridging indicated and satellite shows that there will periods of high clouds. By Wed mid-level flow will back to the w serving to allow for a farther ewd position of the low-level thermal ridge with a stronger downslope component. Clouds will increase Thur ahead of mid-level shrtwv trof with a cold front near or just into the nrn CWFA around 00Z/Fri. This will favor above normal temps followed by a cold front Sat in wake of aforementioned shrtwv trof.
100 AM EST Mon Feb 1 2021 Low pressure will lift northward tonight as the upper level trough and additional showers cross the area Monday.
Light northerly winds will pick up a bit overnight and then relax through the daytime Monday as a result of high pressure settling in over the area. Moderate northerly winds will continue overnight and slowly weaken on Monday as high pressure builds into the area and weakens the pressure gradient. /issued 213 PM CST Sun Jan 31 2021/ SHORT TERM (Now through Monday Night): A cold front passed through Deep South Texas earlier this morning, leaving moderate to gusty northerly winds in its wake. With a cooler and drier airmass gradually sliding in behind this front as high pressure settles over the region today, temperatures will still reach the upper 70s to low 80s this afternoon, but tonight, temperatures will drop into the 40s across most of the area and the 50s along the coast.
High pressure will reside across the area through the early portion of the week. Another low pressure system is expected to cross the region during the midweek period. High pressure remains in place over the Intermountain Region, with the axis of the ridge currently near the UT/CO border. These clouds will help hold overnight min temperatures warmer than they were last night, otherwise expect fairly quiet weather tonight.
Temperatures currently range from the lower to mid 30s.
1058 PM CST Sun Jan 31 2021 Moisture continues to rotate around a departing area of low pressure currently located over the southern Great lakes.
251 AM CST Mon Feb 1 2021 A quiet start to the work week as upper ridging builds in from the west. Surface winds will return to a southerly component today as the ridge axis shifts to the east and a trough develops in the lee of the Rockies.
718 AM EST Mon Feb 1 2021 Slow-moving low pressure will continue to generate snow into Tuesday morning.
344 AM CST Mon Feb 1 2021 Wrap-around flurries will continue into the morning for the Evansville Tri-State and Kentucky Pennyrile as the departing low pressure system moves into the Mid-Atlantic. Early morning lows near freezing accompanied by very low QPF will keep the snow from being impactful. Upper-level flow through the Quad State is northwesterly as a deep trough is positioned on the East Coast and a ridge covers the western two thirds of the country. Dry weather continues Tuesday as high pressure moves eastward through the Quad State, bringing clearing skies and calm winds.
This snow was in response to a wave rotating the mean trough currently centered over OH. A broad ridge has built over the Intermountain West, extending poleward through Alberta and Saskatchewan. At the surface, yesterday's frontal system has moved well to the east with a large area of high pressure over the central CONUS.
Patchy freezing fog is possible on its western periphery and across the residual snow cover in a small part of central Kansas. Otherwise, milder air will return to the area over the next few days as the upper ridge over the Rockies slides gradually eastward across the Plains.
Otherwise, high pressure building into the region today will keep winds light. High pressure will remain over the area tonight, providing light winds. High pressure will finally shift east on Tuesday bringing a return to southeasterly flow at the surface. Upper level ridging will also build into the region in response to a upper level trough digging into the west coast.
characterized by an amplifying ridge over the Central US and troughing aloft along the Pacific/Atlantic coasts. Dry conditions, benign weather, and a warming trend are expected through Tuesday -- as an upper level ridge amplifies over the Rockies and expands eastward atop the High Plains. mainly north and east of Goodland where (1) snow accumulations were greater, (2) pervasive cloud cover /fog/ persisted for several days thereafter, and (3) temperatures have remained at or below freezing.
530 AM CST Mon Feb 1 2021 VFR conditions continue throughout this forecast period as high pressure builds over the region. Ridging builds over the region from the surface through the mid and upper levels over the next 24-36 hours. Breezy conditions persist this morning near the coast, but they will subside as the ridge builds and low pressure moves off to the east.
335 AM MST Mon Feb 1 2021 Upper ridge over the west will bring warm and dry conditions to the region for today and Tuesday.
Upper level ridging brings northwesterly flow aloft with southwest surface winds. A lee side trough today will bring some gusty winds of 10 to 20 mph mainly in the west and northwest Panhandles. All in all, a warming trend is expected with temperatures expected to be even warmer tomorrow than they are today.
A large upper low off the Pacific Northwest Coast will continue to provide a warm southerly wind across the Northern Rockies. Valley temperatures are expected to be in the 40s with the central and southern Bitterroot valley possibly reaching the lower 50s. Clouds and perhaps a few showers from this low will stream south to north across eastern Oregon, Washington and into the Idaho Panhandle. This low pressure system will begin to move inland this evening increasing the chances of precipitation.
648 AM EST Mon Feb 1 2021 Slow-moving low pressure will continue to generate snow into Tuesday morning.
Dry conditions with above normal temperatures will persist through tonight as high pressure remains over the region.
204 AM MST Mon Feb 1 2021 A strong 500mb ridge will dominate the weather pattern over our region today through Tuesday. The upper ridge will induce lee-side pressure falls leading to a decent pressure gradient across the Beartooth foothills through the period. By Tuesday night the mid level winds will have backed to the southwest as the ridge axis shifts east.
Temperatures will drop into the 30s across the majority of the region from late Monday night into early Tuesday morning with the colder low-lying areas dropping down to or below freezing.
Our weather pattern early this morning features upper ridging over the Rockies which will build eastward onto the plains the next couple of days. allowing a warmer airmass to advect onto our region. For temperatures, readings this aftn will be again be dependent on the degree of insolation and have a fairly decent range in highs today with our western zones reaching the low/mid 40s (with more sun). with cooler low/mid 30s expected in the east.
Aloft a 500mb ridge building north from Mexico into West Texas extends well north through the Rockies providing a dry and somewhat cool northwest flow over the State. The mid-level ridge remains in place through tomorrow providing fair and benign conditions for our region.
As anticipated, slick road conditions have developed on untreated and/or elevated surfaces this morning where snow is falling and temperatures have fallen below the freezing mark. In any case, with current temperatures in the low 30s to upper 20s, don't expect much improvement on road surfaces in the near term. Overall rates have been on the light side outside of some localized banding, but we're starting to see accumulations in areas where temperatures have dropped to or below the freezing mark. Quiet wx expected Tue-Wed under sfc and upper ridging. N-NW flow on Tuesday will keep temps below normal, but we'll recover to near normal or even a bit on the higher side by Wed night.
The current northerly 925 mb flow is keeping the clouds there, though by afternoon the low level flow becomes southerly over at least half of our CWA, so may be able to achieve some breaks in the clouds by then. If stratus is not as extensive as presently thought, then temperatures could be a little warmer.
The low responsible for all the cloud cover will shift away from the Ohio Valley today as the longwave pattern amplifies considerably. This will bring high pressure into the area through the remainder of the period.
While this upper ridging will build into the region today through Tuesday, a compact vort lobe moving southeast out of eastern MB will dip into the MN Arrowhead. Upper ridging aloft will continue to advect warmer low level temps out of the south and west through early this week. Slightly warmer temps are expected Tuesday with most in the upper 20s to low 30s.
A trough of low pressure was observed extending southward from an area of low pressure over northwestern Ontario into the Minnesota Arrowhead, western Lake Superior and central Wisconsin early this morning. Some light snow showers were being reported across the Arrowhead with high pressure pushing in from the west.
/issued 319 AM CST Mon Feb 1 2021/ High pressure over the central US will be the dominating weather pattern for us to start this week. As the axis of the high is to our west, winds will continue to be out of the north today. Tonight expect to see low temperatures around freezing in central Louisiana. The high pressure will slowly shift east this week, so a return to southerly winds is anticipated by Tuesday.
454 AM MST Mon Feb 1 2021 The mid-level ridge over the region has become 'dirtied' by high clouds pushing over the area from the southwest. Over the next 36 hours the ridge axis will be driven slowly east of the Continental Divide by a trough approaching the west coast. Ensemble and deterministic models were honing in on the northern stream trough/southern stream cutoff low solution mentioned in previous discussions.
500 AM CST Mon Feb 1 2021 Benign weather is expected today & Tuesday, as a ridge of high pressure sets up over the Upper Midwest. Winds will be light under this ridge which means little in the way of mixing, so stratus will likely continue to persist through the day today and potentially into Tuesday. NBM guidance is optimistic in clearing and drops lows Tuesday morning well into single digits and low teens, while persistent cloud cover would likely keep temperatures around 10 degrees warmer.
There is some high level moisture streaming around the ridge which will result in some passing high clouds today and tomorrow. Lows will bottom out in the low/mid 30s.
An upper level ridge and continued warm advection will bring further warming, and winds will remain relatively light given weak mid level flow and pressure gradients. The area will remain warm and dry Tuesday under the upper ridge. Mostly clear skies and some downslope warming will allow for very warm afternoon highs in the low to mid 60s on the plains and low 40s in the mountains.
The high clouds will decrease some tonight. The ridge will shift to the east out of Wyoming Tuesday night with the push of a strong trough from the west.
A xsct from west to east across the region also showed this high low level rh remaining through Tuesday. The trend in temperatures will continue to be the same with not much variation from the highs and lows.
In the western areas where more sun will be seen today, maximums in the low to mid 50s can be expected, whereas in eastern areas, only mid 40s will be seen.
440 AM EST Mon Feb 1 2021 Slow-moving low pressure will continue to generate snow into Tuesday morning.
/issued 251 AM CST Mon Feb 1 2021/ A quiet start to the work week as upper ridging builds in from the west. Surface winds will return to a southerly component today as the ridge axis shifts to the east and a trough develops in the lee of the Rockies.
353 AM MST Mon Feb 1 2021 Current surface analysis shows high pressure centered to the east-southeast of the area, with a trough to the east of the Rockies from central MT to eastern WY. Upper level analysis shows trough over the eastern US, with ridging centered over the Rockies and a trough off the west coast.
459 AM EST Mon Feb 1 2021 A strong upper level trough will cross the region through the evening.
339 AM CST Mon Feb 1 2021 Benign weather is expected today & Tuesday, as a ridge of high pressure sets up over the Upper Midwest. Winds will be light under this ridge which means little in the way of mixing, so stratus will likely continue to persist through the day today and potentially into Tuesday. NBM guidance is optimistic in clearing and drops lows Tuesday morning well into single digits and low teens, while persistent cloud cover would likely keep temperatures around 10 degrees warmer.
An upper ridge of high pressure remains over the desert southwest, with the ridge axis located over the Four Corners. The upper ridge remains in place for another day, so another dry and warm day is expected across southeast and south central Colorado. As mentioned earlier, there will be a good amount of mid and high level cloudiness today, but afternoon high temps are forecast to be warmer with readings in the mid 30s to mid 40s for the high valleys, and in the 50s to near 60F for the plains.
Radar returns show lighter showers over land, including over the higher elevations of Trinity county where a Winter Storm Warning remains in place. A cold front will advance eastward through the day, guiding along with it the area of heaviest rainfall. By the late afternoon or early evening, the PWAT anomalies will taper off south as the cold front breaches the coast.
532 AM CST Mon Feb 1 2021 Wrap-around flurries will continue into the morning for the Evansville Tri-State and Kentucky Pennyrile as the departing low pressure system moves into the Mid-Atlantic. Early morning lows near freezing accompanied by very low QPF will keep the snow from being impactful. Upper-level flow through the Quad State is northwesterly as a deep trough is positioned on the East Coast and a ridge covers the western two thirds of the country. Dry weather continues Tuesday as high pressure moves eastward through the Quad State, bringing clearing skies and calm winds.
WV imagery indicates a northwest flow aloft prevailing across the Western High Plains downstream of an upper level ridge edging eastward through the Intermountain West. Near the surface, a weak lee side trough of low pressure is anchored in extreme eastern Colorado. Winds will shift to the south today as lee troughing develops across eastern Colorado.
410 AM EST Mon Feb 1 2021 A strong upper level trough will cross the region through the evening.
Another day of mild highs is on tap, with most locations seeing values in the low 60s. With another clear and dry night this evening, lows will once again drop into the mid 30s to low 40s, with the northernmost portions of the area nearing the freezing mark. A longwave ridge will dominate aloft over the central U.
Ridging builds over the region from the surface through the mid and upper levels over the next 24-36 hours. Breezy conditions persist this morning near the coast, but they will subside as the ridge builds and low pressure moves off to the east.
An expansive upper trough resides over the eastern half of the US while a large ridge exists over the western US. Pressure increases are expected today as the upper ridge nudges eastward. At the surface, high pressure will be in place, keeping conditions calm.