Aikyam-Lab/Synoptic-Bench huggingface dataset:
With the trough passage later this morning, SKC will prevail through the remainder of the TAF period. The affect will be minimal with such brevity as the balance of the night almost everywhere will be mostly clear with a below average range of 40s with high pressure on the scene with dew points down in that number.
1014 PM CDT Sat Apr 10 2021 Tonight: Winds should diminish around sunset with ridge axis moving through overnight. Odds favor cooler than expected temperatures (and guidance) as return flow is weak.
Otherwise rest of area will be ridge dominated and mostly clear skies.
145 AM PDT Sun Apr 11 2021 Well above average temperatures today and tomorrow as the ridge of high pressure aloft remains in place.
In advance of a strong cold front presently located over western SD, temperatures will rise into the lower to mid 60s for most of the CWA by this afternoon. By later in the afternoon things will begin to go downhill as the aforementioned cold front begins to sweep through the area.
CD Chattanooga Airport, TN 72 50 79 53 74 / 0 0 0 0 0 Knoxville McGhee Tyson Airport, TN 70 49 76 53 71 / 0 0 0 10 10 Oak Ridge, TN 71 49 77 51 71 / 0 0 0 10 10 Tri Cities Airport, TN 68 46 73 49 69 / 0 0 20 20 10.
250 AM MDT Sun Apr 11 2021 Last evenings cold front brought a band of rain/snow to the area which is just now exiting to the southeast of our CWA.
1122 PM CDT Sat Apr 10 2021 Strong gusty winds have developed under a dry slot associated with the low pressure system over the mid Mississippi Valley. Winds will be slow to subside this evening, since the low pressure center is deepening and low level lapse rates are forecast to remain steep well into the night. Highs will range from the mid 60s in parts of sw Indiana to the lower 70s in southeast Missouri, where sun will be prevalent.
345 AM CDT Sun Apr 11 2021 The center of low pressure over east central Illinois early this morning will progress northeast into Indiana and Ohio today, and eventually into the Great Lakes tonight. Light rain showers associated with moisture rotating around the low into southern Illinois and southwest Indiana will gradually come to an end from southwest to northeast today.
339 AM CDT Sun Apr 11 2021 Key Points: -Pleasant weather expected today with abundant sunshine and light winds as weak high pressure builds into the region.
323 AM EDT Sun Apr 11 2021 A cold front will pass across the region tonight into Sunday.
A much cooler and showery weather pattern persists through much of the coming week. Upper level trough with surface cold front continues to track south and southeast across the state early this morning. A moderate to locally heavy band of snow with gusty winds and blowing snow will begin to slowly diminish and fall apart through the morning hours as it begins to encounter the mountains of central and southwest Montana, with significant snow accumulations in localized areas between Great Falls to near Lewistown, especially north- to northwest-facing slopes in addition to the higher elevations immediately adjacent to the plains. Much cooler temperatures, especially daytime highs, persist through much of the coming week as an unusually strong and near- historic late-season cold snap over Alaska spills south into the CONUS.
The U/L disturbance will exit the region tonight with clearing skies late as high pressure builds over the southeast U.
413 AM EDT Sun Apr 11 2021 Showers will spread back across the area today with much cooler temperatures from 50 to 55.
359 AM EDT Sun Apr 11 2021 A low pressure system will move across the southern Great Lakes today through tonight, resulting in occasional rain showers. High pressure and a drier airmass will build into the region through mid week. Will generally range highs today from the low to mid 50s in the west to the upper 50s in the east.
1027 PM PDT Sat Apr 10 2021 Subfreezing temperatures are expected Sunday morning before the weekend closes out with light winds and dry and sunny conditions.
Main forecast change this evening was the removal of mentionable PoPs as convection failed to develop late this afternoon and evening just ahead of the cold front. However, dry air will continue to filter into the area in wake of the cold front, and expect cloud cover to gradually dissipate over the course of the night -- with a mostly clear sky expected by daybreak Sunday morning. As winds veer to the WNW/NW, cooler air will also filter into the area and expect temperatures to fall into the mid to upper 40s by early Sunday morning. Therefore, expect temperatures will warm quickly into the low to mid 70s on Sunday.
304 AM CDT Sun Apr 11 2021 An upper trough translating southeast from the northern Rockies will close off across the Dakotas today and will send a cold frontal boundary south across the plains states.
1052 PM CDT Sat Apr 10 2021 (This evening through Sunday) Mid-level winds are weakening as a trough continues to move further east away from our area. Through Sunday, forcing with this next trough will remain well north, but it will send a cold front southward into the area by evening. Preceding the cold front, enhancement of downslope flow component will support temperatures nearly 10 degrees above mid- April climo across our area.
1249 AM CDT Sun Apr 11 2021 Summary: Cool and damp weather continues as a large area of low pressure moves north through Lake Michigan wrapping around bands of precipitation that will impact the Northland for several days. A large area of low pressure will slide up Lake Michigan into Sunday as it merges with an upper level low and elongates zonally across the Northland.
355 AM CDT Sun Apr 11 2021 Today and Tonight: A cold front continues to ooze its way southeast through the forecast area this morning. As a result, some stratus and patchy fog has developed along and ahead of the front, while mostly clear skies and cooler conditions exist in its wake this morning. This front will eventually clear the CWA today, with mostly sunny skies and slightly cooler drier conditions expected areawide this afternoon. High pressure at the surface will build directly over the region this evening.
317 AM CDT Sun Apr 11 2021 Recent IR imagery showing very little cloud near to upstream of eastern Kansas with one upper low over central Illinois and another over western Montana. The Montana wave pushes east-southeast today and ushers a cold front through the area. Northwest winds around 30 knots at 925 mb in the somewhat cooler post-frontal airmass under increasing high cloud from the west- southwest keeps lows in the 40s tonight. Low-level northwest flow rules the next few days with upper lows anchored to the northwest and northeast.
An unsettled and cooler weather pattern is expected early in the week.
A cold front will then enter from the northeast Sunday night with winds shifting direction, but remaining gusty during the passage of the frontal boundary.
919 PM MDT Sat Apr 10 2021 Cold front has moved through the area and precip intensity behind the front should persist a couple of hours so have upped precipitation and snow amounts. borsum A cold front associated with an upper trough moving along the Canadian border will move through the area late in the afternoon and evening.
259 AM CDT Sun Apr 11 2021 A slow moving cold front will be pushing through the CWA during the day today. As such, kept temps up some to compensate and could see afternoon highs a little warmer than currently forecast.
Regional radar loop this evening shows a band of showers approaching from the Ohio Valley associated with upper low over the midwest. The arrival of surface warm front should result in clearing skies later Sunday morning over the Allegheny Plateau. Focus for the afternoon will shift toward the potential of developing convection in narrow warm sector south of slow-moving warm front. Partly sunny skies in warm sector ahead of approaching cold front should jump into the low 70s over the south central counties Sunday afternoon, with 65-70F most likely elsewhere.
The next cold front moves into NE OK by late afternoon and clears the forecast Sunday night.
East-central and far northeast Wisconsin may actually see a break in the rainfall and possibly even a few peeks of sunshine as some drier air rotates around the low. Aloft, a broad trough is expected to remain in place.
Temperatures range from the low 30s across central Nebraska to the middle 40s in southwest Nebraska. Aloft, an upper low was evident over MT in GOES UL WV imagery. This will drag a cold front through the CWA during the late morning/early afternoon. Behind this front, expect good dry air advection, with dewpoints anticipated to fall into the low teens to even single digits across the Panhandle and southwest Nebraska. This could lead to slower decoupling of the boundary layer overnight, and as a consequence will keep lows overnight a little warmer east of HWY 183 where cold advection looks the strongest. Even though temps look to be a tad cooler tomorrow the very dry air will again lead to near critical fire weather conditions across southwest and central Nebraska.
/Today through Monday/ The morning sfc analysis indicates sfc ridging centered over E TX, and remains progged to slowly drift E over Cntrl LA later today.
STP Last evenings cold front brought a band of rain/snow to the area which is just now exiting to the southeast of our CWA. Northerly upslope flow in the lower to mid levels will continue to produce a few areas of light snow over the mountains and foothills tonight into Monday. Lobe of upper low over the Dakotas will swing through eastern Montana from the north on Monday as well, bringing a good chance of mainly light rain/snow to the eastern counties in our CWA. BT A large-scale blocking pattern with upper-level ridging over Canada will develop early this week and persist for much of the rest of the week. The blocking pattern will cause weather systems to move slowly over North America.
400 AM MDT Sun Apr 11 2021 MORNING DISCUSSION: Synoptic Setup: A large trough runs south from the Northwest Territories down through Alberta into eastern Montana and terminating over northern Wyoming. To the west a large ridge jogs north up the coast of North America from California to British Columbia.
Today will be a sunny and breezy day with highs expected to reach the low to mid 70s. Satellite images showed a low pressure center spinning from Illinois into Indiana, and the low will roll toward the Motor City by evening. Here on the south side of the low, brisk west winds will bring in dry air. On Monday, a trough and weak front will approach. We continue to look forward to a cooler pattern (near normal temps) this week as a couple of fronts drop across the region.
(Today and tonight) Warmer temperatures will be the main story for today as most areas will be back in the upper 80s to lower 90s.
849 AM EDT Sun Apr 11 2021 Periodic shower chances will continue through mid week with crossing upper level lows. After a break this morning, clouds and isolated to scattered light showers should develop as an upper low tracks east toward the Upper Ohio Valley region and colder air moves in aloft. Daytime highs will be noticeably cooler, especially across western counties. The closed low is progged to drift east across te Lower Great Lakes/Upper Ohio Valley region tonight and Monday.
The surface cold front has pushed into central North Dakota. After the initial surge of strong winds with the passing of the cold front, wind speeds will likely diminish a bit, for the previous reasons, but an uptick in speeds is expected this afternoon with the passing of the second front. A complex synoptic pattern will begin to evolve Sunday night into Monday as the closed low swinging through the Dakotas starts interacting with another closed low downstream over the Great Lakes.
650 AM EDT Sun Apr 11 2021 A cold front will move east across the region during the afternoon and evening.
A much cooler airmass in the wake of a dry cold front will reside across the Great Basin today. High pressure will temporarily develop across the area Monday, before upper level low brings unsettled weather for the midweek period.
A weak cold front has been slowly pushing southeast overnight and should be exiting Central Alabama by sunrise today. Clouds developed ahead of the front, with many locations still in the lower 60s south of the front. A warm-up on Monday with highs in the lower to middle 80s.
942 AM EDT Sun Apr 11 2021 Latest surface analysis places the occluded low pressure center over northern IL/IN state boundary and the triple point over the thumb of MI with the cold front stretched N-S over eastern KY. Monday will be a warm and somewhat breezy day as a weak and moisture-starved cold front pushes through the Ohio Valley. However, heights aloft never really drop over the lower Ohio Valley, so our temps will actually run just slightly below normal for mid-April.
/19/ Today and Tonight: A cold front continues to ooze its way southeast through the forecast area this morning. As a result, some stratus and patchy fog has developed along and ahead of the front, while mostly clear skies and cooler conditions exist in its wake this morning. This front will eventually clear the CWA today, with mostly sunny skies and slightly cooler drier conditions expected areawide this afternoon. High pressure at the surface will build directly over the region this evening.
246 AM PDT Sun Apr 11 2021 Fair skies will prevail today, but gradual cooling will begin as low pressure develops over the Great Basin.
645 AM EDT Sun Apr 11 2021 A low pressure system will move across the southern Great Lakes today through tonight, resulting in occasional rain showers. High pressure and a drier airmass will build into the region through mid week. Will generally range highs today from the low to mid 50s in the west to the upper 50s in the east. Temperatures will begin to rebound by Monday with highs ranging from the lower 60s in the north to the upper 60s across the south.
Another upper system is expected to move across the NRN Plains and contribute to the development/SWD movement of a cold front which is predicted to enter CNTRL TX Monday afternoon. Despite approach of the upper system from the west, and the approach of the cold front, convection is not expected Monday.
Early morning sfc analysis shows the cold front about to exit lower Acadiana with high pressure building over the majority of the forecast area at this time. Water vapor imagery shows troffing over the ern CONUS with a nwrly flow now established over the wrn Gulf region. It looks to be another rather warm day across the forecast area as highs are progged to run in the lower to mid 80s. Weak ridging building in behind the disturbance will allow temps to further warm on Monday with highs into the upper 80s over interior sern TX.
625 AM CDT Sun Apr 11 2021 (Today and tonight) A rapid warmup is expected this afternoon with southwest surface flow returning ahead of a cold front. The cold front will enter northern OK late this afternoon and evening and make it through most our zones a few hours before sunrise Monday.
Periodic shower chances will return later today, and continue through mid week, with crossing upper level lows. A partial clearing trend is expected after the rain ends, though clouds and scattered showers should move back across portions of the region mainly W of I 79 this afternoon as the low tracks east toward the Upper Ohio Valley region. Wind gusts from 25 to 30 mph are expected by afternoon with mixing, and a sufficient pressure gradient ahead of the low. The closed low is progged to drift east across te Lower Great Lakes/Upper Ohio Valley region tonight and Monday.
If the showers and storms arrive later however, then temps will be a few degrees warmer.
/issued 301 AM CDT Sun Apr 11 2021/ The occluded upper low over the Midwest will continue to slowly fill as it inches eastward over the next 48 hours. The pattern will remain somewhat stable for a few days given the large, blocking over eastern Canada, but this ridge will eventually break down by midweek as the pattern shifts. A ridge will build over the west with an associated trough in the east, representative of a the positive phase of the Pacific/North American teleconnection pattern. We'll see a lot of sun and temperatures in the low to mid 70s. We also won't be quite as cool overnight with low temperatures primarily in the lower 50s. A weak cold front will dip into the Mid-South on Monday, providing an eventual wind shift.
624 AM CDT Sun Apr 11 2021 Key Points: -Pleasant weather expected today with abundant sunshine and light winds as weak high pressure builds into the region.
Overall, high pressure over the region will maintain dry sunny days and somewhat cool nights for the coming week. The combination of high pressure over the inland Pac NW and weak thermal trough along the coast will result in light to moderate offshore flow from time to time.
Not much change in the weather expected today with continued warmer than normal temperatures and breezy afternoon winds.
407 AM MDT Sun Apr 11 2021 Current surface analysis shows strong cold front moving east into central SD. Will downgrade the high wind warning to an advisory when this happens.
High pressure will build over the eastern Gulf of Mexico later tonight into Monday with winds and seas gradually diminishing and subsiding.
Winds are decreasing over our forecast area but will not completely go calm this morning due to a continued pressure gradient from a Canadian Cold Front dropping south into Eastern Montana currently. This afternoon the upper level trough will keep showers going over Continental Divide.
1045 AM EDT Sun Apr 11 2021 High pressure builds in through Monday, leading to drier conditions.
A frosty start to the morning for many areas across Western Washington today, with morning lows near to below freezing in many spots across the region. Upper level ridging offshore will start to build into the region today for a drier start to the week.
647 AM EDT Sun Apr 11 2021 High pressure builds in through Monday, leading to drier conditions.
Main weather feature today will be a cold front that will move through western Kansas through the late morning hours and the cold air will probably lag by a couple hours behind the passage of the front. Winds should begin to relax as high pressure moves in and with cold air advection continuing through the night we should see lows fall back mainly into the 30s.
The trailing trough axis will cross the TN Valley between 12-18Z and veer deep-layer flow to the northwest by late afternoon. At the surface, light west- southwesterly winds have been observed throughout the night, in the gradient between a ridge centered over east TX and a low over the southwestern Great Lakes.
The closed upper low rotating atop northern OH continues to advect mid/upr level moisture across the OH valley this morning, eventually into portions of the TN valley this afternoon, all while the low levels remain somewhat dry post fropa. CD Chattanooga Airport, TN 74 50 81 53 74 / 0 0 0 0 10 Knoxville McGhee Tyson Airport, TN 71 49 77 51 71 / 0 0 0 0 10 Oak Ridge, TN 73 47 78 50 71 / 0 0 0 0 10 Tri Cities Airport, TN 69 45 73 48 68 / 0 0 0 10 10.
/86/ Prior discussion below: Today and Tonight: A cold front continues to ooze its way southeast through the forecast area this morning. As a result, some stratus and patchy fog has developed along and ahead of the front, while mostly clear skies and cooler conditions exist in its wake this morning. This front will eventually clear the CWA today, with mostly sunny skies and slightly cooler drier conditions expected areawide this afternoon. High pressure at the surface will build directly over the region this evening.
Dry cold front looks to lay along a line from Alliance to Scottsbluff to just north of Cheyenne. west to a low pressure system just west of Rawlins. Looks like the low passes just north of our CWA with limited QPF for mainly the western mountains.
Water vapor satellite imagery shows the closed low over central Illinois. Meanwhile, the trough from Saskatchewan to Montana will swing southeast toward the Northern Plains today, becoming elongated as trailing low pressure dumbbells on the backside, gradually consolidating over Minnesota Monday. may hold in the 40s and warmer 60s may reach Floyd Co. The HRRR/RAP show some 30 to 40kt winds over western Minnesota spreading east with steep lapse rates in the low levels and mixing.
735 AM EDT Sun Apr 11 2021 Light showers are possible this morning, then periodic shower chances will return later today and continue through mid week with crossing upper level lows. A partial clearing trend is expected after the rain ends, though clouds and scattered showers should move back across portions of the region mainly W of I 79 this afternoon as the low tracks east toward the Upper Ohio Valley region. Wind gusts from 25 to 30 mph are expected by afternoon with mixing, and a sufficient pressure gradient ahead of the low. The closed low is progged to drift east across te Lower Great Lakes/Upper Ohio Valley region tonight and Monday.
722 AM EDT Sun Apr 11 2021 A weak cold front will pass across the lower mid-Atlantic today into this evening as high pressure builds east along the Gulf coast region.
Monday will be a warm and somewhat breezy day as a weak and moisture-starved cold front pushes through the Ohio Valley. However, heights aloft never really drop over the lower Ohio Valley, so our temps will actually run just slightly below normal for mid-April.
506 AM CDT Sun Apr 11 2021 A slow moving cold front will be pushing through the CWA during the day today. As such, kept temps up some to compensate and could see afternoon highs a little warmer than currently forecast.
320 AM MDT Sun Apr 11 2021 Current surface analysis shows strong cold front moving east into central SD. Will downgrade the high wind warning to an advisory when this happens.
Flow aloft has turned northwesterly as an offshore long wave ridge builds into the area. A thermal trough has developed near the coast. After this cold morning, temperatures will trend warmer and humidities will trend drier into Monday evening. Winds will be gusty over the ridges, especially during the nighttime hours, and this will lead to worsening RH recoveries in those areas.
In advance of a strong cold front presently located over western SD, temperatures will rise into the lower to mid 60s for most of the CWA by this afternoon. By later in the afternoon things will begin to go downhill as the aforementioned cold front begins to sweep through the area. Monday will be a cooler day with highs in the upper 40s to mid 50s. An elongated upper level low remains just to our north and cannot completely rule out a light shower or sprinkle through the Highway 14 corridor during the day.
An upper trough translating southeast from the northern Rockies will close off across the Dakotas today and will send a cold frontal boundary south across the plains states. Monday will see cooler and breezy conditions in the post frontal airmass with daytime temps in the 55-60F range and northwest wind gusts of 20 to 30 mph. The airmass remains very dry and low relative humidity values are forecast to drop into the 20th percentile across our entire cwa with the lowest values focused mainly west of Highway 281.
610 AM MDT Sun Apr 11 2021 Have downgraded the high wind warning to an advisory through the afternoon for the Rapid City area and Pennington/southern Meade county plains as winds have now decreased below warning levels. There will be lulls in the stronger winds as main surge shifts east of the area early this morning, but a secondary cold front will likely produce some stronger winds again during the midday and afternoon hours. Current surface analysis shows strong cold front moving east into central SD. Will downgrade the high wind warning to an advisory when this happens.
(Today and tonight) A rapid warmup is expected this afternoon with southwest surface flow returning ahead of a cold front. The cold front will enter northern OK late this afternoon and evening and make it through most our zones a few hours before sunrise Monday.
Otherwise rest of area will be ridge dominated and mostly clear skies. Monday will continue to be dry under broad ridging and some NW flow aloft.