Aikyam-Lab/Synoptic-Bench huggingface dataset:
Ceilings 2-4kft will continue through the early evening, with the lower values in the west and higher values in the east. This clearing is associated with the dry slot of the low pressure system that is currently over the Twin Cities area. Look for low clouds to spread back into southern WI by early afternoon as moisture wraps around the south side of the low. Expect gusty westerly winds across southern WI this afternoon as low pressure tracks through northern WI and into the U.
MVFR CIGS have pushed into southeast Wisconsin late this afternoon, but should lift quickly north this evening as some dry air advects into the area in the wake of departing low pressure. There is a chance of showers and a few storms with a low pressure system and frontal boundary drifting into the area from the west later Monday afternoon. Winds will be 15 to 25kts Monday afternoon ahead of the approaching low pressure and frontal boundary. A midlevel trough will swing through tonight. Behind it the low levels will start to dry out and clouds will start to break up. An upper low will shift across the upper Great Lakes with warm air advection at the low levels. The freezing level is pretty low around 8 kft so there is a hail threat for any thunderstorm that develop.
303 PM CDT Sun May 21 2017 Low clouds continue to scatter out across the TN Valley this afternoon ahead of an approaching cold front. Like yesterday, gusty/damaging winds will be the primary threat if something can get going, with a lesser threat for small hail due to a fairly high freezing level ~13kft. This system will move to the NE thanks to SW flow around the parent upper low, and this will translate to showers/storms moving back into the area by Monday afternoon.
While ceiling range in the VFR to MVFR this evening, they will likely fall to IFR later tonight as warm front moves through.
An upper level ridge will be over the region through Monday.
349 PM EDT Sun May 21 2017 Low pressure over the northern Great Lakes will drift across eastern Canada through Monday. The associated cold front will slide across the area this evening and tonight.
600 PM CDT Sun May 21 2017 (Tonight) Cooler and drier air continues to filter into the bi-state region late this afternoon. This should leave the CWFA clear to mostly clear overnight tonight with high pressure across southern Missouri in control. Should be quite a cool night with favorable conditions for raditional cooling in close proximity to sfc anticyclone. Louis in the low 50s. Temperatures on Monday should be quite a bit warmer than that of today for most of the area with south/southwest winds expected at the surface along with 850-hPa temperatures rising to around +10C.
tonight through Monday night: Local radars are lit up across central Mississippi late this afternoon as a line of strong to severe storms has formed along a weak cold front that will drift southeast through the remainder of the CWA this evening. This activity should end well before midnight but the cold front will stall just south of the CWA.
140 PM CDT Sun May 21 2017 Shrtwv trof moving across nrn MX along with steep LR/s and ample low level moisture have combined to result in pockets of heavy rain across the Big Bend/Lower Trans Pecos (2. These storms are tracking e and area of heaviest rain confined to the Lower Trans Pecos. By late afternoon Mon/Mon evening steep mid level LR/s within NW flow and surface Td in M50s in alignment with daytime heating along with an identifiable shrtwv trof will be a good set-up for tstms across PB. A cold front will quickly re-enforce outflow winds and brief post-frontal precip will be possible mainly in the morning across the PB and then Lower Trans Pecos/Big Bend region in the afternoon.
A warm front will move through overnight with low cloud cover persisting into the afternoon hours across much West Central Texas. Mainly isolated light showers are expected Monday the warm front moves through, but scattered thunderstorms are possible late afternoon, mainly north of I-10, as a upper disturbance moves southeast in northwest flow aloft. (Monday Night through Sunday) A little drier conditions on Monday and a little warmer temperatures will allow for better instability to develop and spread northward.
406 PM EDT Sun May 21 2017 Dry conditions are expected tonight and Monday as high pressure moves into the region.
230 PM CDT Sun May 21 2017 Large troughing in the eastern half of the CONUS with embedded short waves will dominate the weather for the next few days. Continued southeasterly low level flow will encourage isolated storm development to continue across this higher terrain region. This low level jet will advect in stronger low level moisture along with elevated instability thus increasing prospects for continue thunder chances through the night. The low stratus will also cast a doubt on available instability during the afternoon over the South Plains and Rolling Plains.
329 PM EDT Sun May 21 2017 High pressure in Canada will crest over the area tonight and move east Monday.
1249 PM CDT Sun May 21 2017 Showers will be slow to end across our northern zones this morning as low pressure lifts slowly to the northeast due to trowaling. However eventually drier air in the low levels finally moves into the area by midday and afternoon. Coupled with unstable dry adiabatic soundings for the lapse rates in the low layers and a vort filament, a few instability showers could linger in these zones through the afternoon. 25 to 30 knots exists in the mixed layer and as mentioned, it is unstable in the lowest kilometer.
345 PM MDT Sun May 21 2017 A large upper low over the northern Great Plains and Great Lakes region and an upper ridge nosing into the Pacific Northwest through the period will keep northwesterly flow aloft. Low temperatures tonight will remain below normal, with readings likely slightly warmer over the southern half of the forecast area due to cloud cover hanging on. High temperatures will be similar to today before a cold front pushes south across the area late afternoon to early evening. Over the high country, snow levels are expected to dip down to near 9000 feet tonight then back up to 10000 feet Monday.
443 PM EDT Sun May 21 2017 High pressure moves east of the area today. A series of low pressure systems will impact the area through the week, resulting in periods of unsettled weather. As a high amplitude ridge moves east off the coast, mainly mid and high level clouds will advect east as warm air advection develops. The first chc of light rain will develop aft 06z from west to east with the approach of the upstream warm front. Light rain will gradually end as the low moves SE of Long Island.
Ridge of high pressure off the Atlantic coast continues a weak steering regime aloft with ample moisture in place over the Peninsula. Another day of efficient heating with highs in the low-mid 90s, coupled with PW values around 1. The westerly winds will also keep temperatures more subdued with highs topping out in the low- mid 80s at the beaches and around 90 degrees inland. The pattern aloft will start out with a large and broad trough extending across the central part of the country. As we head into the middle part of the week, this trough will amplify and extend into the southeast and toward the east coast.
Weak, large-scale ridging prevails across the area, with maritime tropical air at the surface, surmounted by weak conditional instability and significant low- level convective inhibtion.
805 PM EDT Thu Jun 22 2017 Bermuda high pressure will extend westward from the Atlantic across the Carolinas through Friday.
However, clearing skies over southwest Montana could cause temperatures to fall to near or slightly below freezing tonight, so delicate plants there should be covered or otherwise protected.
The cold front is expected to begin to move into NW parts of the fa early tomorrow morning with showers/storms remaining possible Friday. A cold front will move south across the area late tonight and through the day on Friday. The front will also bring noticeably cooler air into the northern/central part of the area. This front makes a good push to our south by late June standards taking the edge off of the high temperatures for a few days. We remain under northwesterly flow aloft and continue with some chances of precipitation with both the moisture return from the south and the possibility of convection moving off the High Plains toward the area.
On this date in Keys Weather History, 1901, the low temperature was 70 degrees and set the daily record for minimum temperature in Key West on June 22nd.
841 PM CDT Thu Jun 22 2017 Stratus clouds off to our northwest will be moving in tonight as cooler Canadian air advects in. Cooler temperatures will continue filtering into the area behind a low pressure crossing southern Canada. An upper low moving thru Ontario into the western Great Lakes region during the upcoming weekend will bring a relatively cool, northwesterly flow pattern to the Dakotas and Minnesota.
Otherwise, clearing skies are expected across Southwestern Montana, where overnight low temperatures may fall near or slightly below freezing. Should freezing temperatures be realized over these areas, delicate/sensitive vegetation would be at risk if not covered or protected. However, clearing skies over southwest Montana could cause temperatures to fall to near or slightly below freezing tonight, so delicate plants there should be covered or otherwise protected.
Latest hi-res model runs still indicate the best chances for any sprinkles/light showers will be across the far north as the lower levels moisten up a bit. Model soundings indicate that Friday will be breezy as well, but a bit less than today with winds beginning to weaken aloft and a bit more moisture in the lower levels. Additionally, isolated to scattered showers will develop tonight in the northern valley and Friday in parts of northwest Minnesota as the main trough axis swings through and the upper low moves from eastern Manitoba toward the Minnesota Arrowhead. With northwest flow, increasing cloud cover into Friday, and positioning upstream of the trough, expect cooler conditions Friday with highs generally remaining in the 60s.
With the main synoptic cold front still well to the northwest, and a capped environment over the forecast area, these features will remain weak through early evening and tonight's anticipated thunderstorms have yet to develop. Temperatures ranged from the upper 70s along the Highway 20 corridor to the mid 80s in southeast Iowa and northeast Missouri. Models depict a cold front sliding southeastward across the region from basically 06 utc to about 09 UTC Friday. This is expected to be a progressive system with the front moving through and high pressure building into the region for the end of the work week.
The low will eject NE overnight and the rain with, but IFR/MVFr cigs and vsby remain. An approaching cold front will arrive tomorrow late into Sat a. However, believe this will change overnight as Cindy continues to open up into an elongated upper trough as she continues to lift NE into Scntrl AR, with the trailing H850 trough expected to linger across Scntrl AR into extre. S of this bndry, a 40-50kt Swrly LLJ will continue S of the ejecting low center, resulting in a period of continued convergence along the H850 trough and thus renewed development. Did have to make some changes to pops Friday as well, as the highest pops will remain concentrated during the morning over N L.
Diurnal cooling combined with an influx of cooler air behind the weak cold front moving toward the southern border has caused temperatures to moderate. A weak trough aloft, most readily seen as a diffuse gradient in 700mb temperatures, remains to the north along the CO/UT border today. Overnight temperatures are expected to be notably cooler than in past nights throughout much of eastern Utah and western Colorado as the 700mb thermal gradient passes through. Wind flow will generally be northwesterly behind the departing trough, with only a few afternoon cumulus clouds expected in the higher terrain along the Continental Divide. The weekend forecast remains on track with dry west to northwesterly flow in place and temperatures about 5 degrees above normal as the southwestern ridge strengthens.
Generally PCloudy skies but will have to watch a few hours around sunrise for some low stratus clouds, especially over the interior with added moisture in the low-levels from yesterday's rainfall. However, with limited moisture and ridge/warmer than normal temperatures persisting aloft, it looks to remain dry over much of the region.
Cold front expected to pass terminals between 06z and 11z Friday, with north northeast surface winds gusting into the 30 to 40 kt range through at least most of the morning. High pressure will continue to amplify over the west as the upper level trough digs down the central and eastern CONUS. A cold front will work its way south tonight across the Panhandles, bringing a relief in temperatures over the next few days.
745 PM MDT Thu Jun 22 2017 It's a brisk almost fall-like evening with gusty north winds associated with a Canadian cold front.
Fcst soundings for Friday show 850 temps near 22 C over Houston so max temps look warmer. Low level moisture will make it feel even warmer with HI values between 103 and 110 degrees.
During the overnight, the low level pressure center will lift into northeast AR, with stronger convection focusing ahead of this low. In addition, a cold front will begin to push into the Mid-South Friday afternoon.
1145 PM CDT Thu Jun 22 2017 This is the last day of rather warm temperatures as a strong cold front will move in tonight. The most noticeable result will be a cooler and less humid airmass.
Anticipate little change in temperatures Friday as high pressure remains situated across northern Mexico. Storm chances return to the higher terrain as well.
Attention now shifts to the north at approaching cold front located from sern Nebraska into the nwrn Texas Panhandle at 02z.
After Cindy passes on Friday, focus will then shift to convection associated with a cold front moving in from the plains.
However, believe this will change overnight as Cindy continues to open up into an elongated upper trough as she continues to lift NE into Scntrl AR, with the trailing H850 trough expected to linger across Scntrl AR into extreme Nrn LA near the I-20 corridor. S of this bndry, a 40-50kt Swrly LLJ will continue S of the ejecting low center, resulting in a period of continued convergence along the H850 trough and thus renewed development. Did have to make some changes to pops Friday as well, as the highest pops will remain concentrated during the morning over N LA. The low will eject NE overnight and the rain with, but IFR/MVFr cigs and vsby remain. An approaching cold front will arrive tomorrow late into Sat a.
Best chance for any rainfall should stay over the north and west, though any rainfall amounts will be on the low end if anything at all. Currently another cold front had entered northern North Dakota with a reinforcement of cold advection behind it. The high wind warning winds in the far north are thought to be more isolated in nature. However, should the higher 3-hour pressure rises forecast for this evening become realized at the surface over a wider area, we may need to consider issuing a high wind warning. Still, went on the high side of guidance for winds giving us 20 to 30 mph sustained winds Friday with gusts to 35 mph at times.
As of this hour the Bay Area is trending cooler, along with the Delta and Sacramento area. While it's taking a while to cool off due to the high heat today the flow through the delta will make a difference by morning. Have lowered overnight forecast lows for the Delta and Sacramento region cooler but potential for a little bit more cooling is there and for slightly lower highs for those areas on Friday. The high heat, low relative humidity and increased winds will continue high fire danger as the Red Flag Warning continues. Hot weather continues across the northern half of the Sacramento Valley and in the mountains late this week while cooler weather gradually returns to the Delta and southern Sacramento Valley as the Delta Breeze returns.
1048 PM CDT Thu Jun 22 2017 A cold front will continue to move southeastward into northwest Iowa this afternoon and evening bringing more stable conditions behind it. As the main low moves out of the area tonight, northwesterly winds will become more dominant, keeping the area mostly dry, but cooler and breezier than previous days. An upper-level trough will be moving southward into the Great Lakes, increasing cloud coverage over the region in the overnight hours through Friday afternoon. Overall, it will be breezy, with low humidity, and cooler temperatures.
620 PM CDT Thu Jun 22 2017 This is the last day of rather warm temperatures as a strong cold front will move in tonight. The most noticeable result will be a cooler and less humid airmass.
This should allow temperatures to climb into the lower and middle 90s like today.
VFR to MVFR conditions are expected to prevail through the valid period with scattered showers and thunderstorms affecting the TAF sites on Friday as a cold front moves through the region. As has been stated previously, since our area will be on the western side of the cyclone there will be no impact from this system, aside from the increased cloud cover today.
High pressure over the area will continue to bring warm and dry conditions through much of the weekend. This building high pressure will relax the pressure gradient across the area which will bring lighter wind across the area.
Forecast was updated late this afternoon to cancel the High wind Warning. A low pressure trough will push through NE Montana this evening producing strong NW winds with gusts well into the 40 to 60 mph range. The main upper low over central Canada is forecast to send another weather disturbance and trough across southern Saskatchewan Friday with NW winds increasing again and becoming strong 15 to 30 mph with gusts from 35 to 50 mph by Friday afternoon. With the upper trof over south central Canada, expect high temperatures to remain well below average for the next several days.
905 PM EDT Thu Jun 22 2017 Convection near and west of Trail Ridge will diminish by 11 p.
1044 PM EDT Thu Jun 22 2017 Considerable moisture continues to stream into the area in the southerly flow between high pressure off the Southeast Coast and the remnants of Cindy to the west.
637 PM CDT Thu Jun 22 2017 A cold front will continue to move southeastward into northwest Iowa this afternoon and evening bringing more stable conditions behind it. As the main low moves out of the area tonight, northwesterly winds will become more dominant, keeping the area mostly dry, but cooler and breezier than previous days. An upper-level trough will be moving southward into the Great Lakes, increasing cloud coverage over the region in the overnight hours through Friday afternoon. Overall, it will be breezy, with low humidity, and cooler temperatures.
822 PM EDT Thu Jun 22 2017 Considerable moisture continues to stream into the area in the southerly flow between high pressure off the Southeast Coast and the remnants of Cindy to the west.
A ridge of high pressure will continue to build off the west coast and begin to expands its reach into the Pacific Northwest on Friday. This will lead to warmer temperatures of 5 to 10 degrees across the forecast area Friday.
1241 AM EST Sun Dec 3 2017 High pressure will keep the region unseasonably warm and dry through the weekend.
428 AM EST Sun Dec 3 2017 High pressure will lead to continued dry and mild conditions today into Monday.
1122 PM CST Sat Dec 2 2017 Weak low level flow due to high pressure will continue through tonight. This low level flow will push temperatures back into the upper 60s to perhaps low 70s. A long wave trough will deepen as it moves across the Rockies, while at the surface a strong cold front approaches the area. A much colder airmass will follow this frontal passage for the middle and later part of the week as an upper level trough carves out across the eastern U.
342 AM CST Sun Dec 3 2017 A strong pacific cold front will move through wrn Nebraska 09z-12z Monday morning. Isolated showers are possible across Ncntl Neb associated with the pacific cold front. An upper level trough of low pressure is forecast to cross the Northern Rockies and dig into the high plains early Monday. A closed low will form to the lee of the Wyoming Rockies and move east across the SDAK/NEB border through the day reaching far sw MN by late afternoon. The track of the low pressure will provide for increasing chances of precipitation across northern portions of the forecast area. The cold front is strong, the latest models have pushed up wind speeds once again, with the latest guidance indicating gusts at or above 45 mph.
Temperatures this afternoon to climb into the lower to middle 70s.
but first, very warm temperatures are expected this afternoon, despite our continued canopy of high cirrus streaming ahead of a weakening upper low moving quickly across northwest MX and Srn NM. An upper-trough moving through the Rockies will elongate late Sunday into Monday as some energy swings out across the central and northern plains while some dives south through the Great Basin. The trough will dislodge cold air in Canada, sending it rushing south through the high plains, with the front reaching our northern counties probably early to mid-afternoon per the latest guidance. South of the front, we'll see a pre-frontal trough sliding east across the forecast area, which should allow for a little cooling across our northern/northwestern Counties before the actual front arrives.
230 AM CST Sun Dec 3 2017 Targets of short term forecast opportunity remain in the high temp forecast Today and Tmrw, as we continue to spot up a degree or two from the blend.
More high clouds will stream east over the Dakotas associated with some higher level Pacific moisture as the upper level trough moves ashore over the northwest. As the upper trough lifts northeast, colder air will drop in behind the low beginning Monday afternoon across the western cwa.
Freezing temps appear likely for most of the area by then. Another cold front will arrive sometime late Fri-early Sat.
319 AM EST Sun Dec 3 2017 High pressure provides dry weather through Monday, with a slow warming trend.
1131 PM EST Sat Dec 2 2017 High pressure provides dry weather through Monday, with a slow warming trend.
A big trough will develop and dig across the central U. A strong cold front will move into the region Monday afternoon. A broken line of storms will quickly develop right along the cold front by mid to late afternoon Monday.
Have not raised highs quite as much as some of the guidance suggests, due to under- represented cloud cover in many of the models, but have still kept highs in the lower to mid 60s -- a full 20 degrees above average. Boundary layer mixing ahead of an approaching cold front will temporarily decrease the drizzle potential after sunrise, but cloud cover is likely to linger. That cold front will push through Monday afternoon, which will bring rapidly decreasing dewpoints and breezy northwest winds, but slightly offset diminishing temperatures.
344 AM CST Sun Dec 3 2017 A strong pacific cold front will move through wrn Nebraska 09z-12z Monday morning. Isolated showers are possible across Ncntl Neb associated with the pacific cold front. An upper level trough of low pressure is forecast to cross the Northern Rockies and dig into the high plains early Monday. A closed low will form to the lee of the Wyoming Rockies and move east across the SDAK/NEB border through the day reaching far sw MN by late afternoon. The track of the low pressure will provide for increasing chances of precipitation across northern portions of the forecast area. The cold front is strong, the latest models have pushed up wind speeds once again, with the latest guidance indicating gusts at or above 45 mph.
With clearing skies, temperatures will be cooler tonight than last night ranging from the lower 40s north to the upper 40s south.