Aikyam-Lab/Synoptic-Bench huggingface dataset:
The cold front that moved through early this morning stalls across the northern Gulf coast (already seeing notable frontolysis on front's tail-end and a rope cloud is now evident as it begins to lay E-W). A secondary cold front passes through this afternoon before also stalling (all being forced by a broad upstream positive-tilt mid- and upper trough). Nice, pleasant and well- deserved evening! highs tomorrow ranging from the lower 70s over Choctaw County AL to near 80 deg F along the coast. the cold front will stall to the south and clouds and moisture gradually return from the southeast tomorrow.
1134 AM MDT Mon Apr 13 2020 Anonymously deep/cold upper level trough will continue to bring unseasonably cold, unsettled, and breezy conds to the region the next few days. The best chance for snow showers will be over the higher terrain of NE WY and the Black Hills with isolated activity across other locations. Slightly warmer temps expected.
250 PM CDT Mon Apr 13 2020 Winds will diminish this evening as high pressure edges southeast toward the mid Mississippi Valley. As a very cool air mass remains place, temperatures are expected to fall below freezing the next few nights over a large part of central Illinois.
708 PM EDT Mon Apr 13 2020 A cold front will move through the area tonight and become stationary in the coastal plain Tuesday. Weak low pressure will develop along the front and track northeast.
610 PM CDT Mon Apr 13 2020 We remain in a cold Spring weather pattern under the influence of an upper trough encompassing the interior CONUS, while at the surface, high pressure was building south along the high plains. On Tuesday the upper trough will edge eastward allowing the airmass to moderate several degrees. While still well below normal for this time of year, high temps should be roughly 5-10 degrees warmer than today. Near critical fire weather conditions are possible for several hours Tuesday aftn for locations in north central KS and areas along and south of Highway 6 in Nebraska where low relative humidity values are forecast in the low 20th percentile.
/19/ Tonight & Tuesday: Tonight: As cold core low swings east-northeast into Canada, expect the strong low pressure system to swing northeast into eastern Canada. This will keep continued surface ridging & continued cold advection around into the overnight hours. Due to dry air, expect a much cooler night with some lingering northeasterly winds. Lows will predominately stay near 5-10 degrees below normal in the low 40s to the north to mid-upper 40s elsewhere. /DC/ The region remains under the influence of a high pressure ridge through midweek. The CONUS is dominated by a broad trough aloft, with weakly southwesterly flow in place at 500 mb over much of the south.
Dry warmer weather is expected to prevail through mid week. An upper trough may generate isolated showers over the mountains toward the end of the week. Interior valleys will warm into the 70s to lower 80s, while coastal areas stay much cooler in the mid 50s to mid 60s.
There is a secondary cold front associated with that jet feature, so when that crosses Lake Michigan we get enhanced lift, which then results in some light snow showers. -Wind decreasing this evening Peak wind gusts of 45 to 50 mph occurring this afternoon and expect a few more hours before mixing height lowers this evening and tight surface pressure gradient relaxes as the low pulls off to the northeast.
Strong upper ridge centered offshore with a weather system moving over the top into southern BC. Temperatures are few degrees warmer as compared to this time yesterday however dew points are lower. Based on this and the high level clouds overspreading the region expect temps will be few degrees warmer than last night. Partly cloudy for Tuesday with mid and high level clouds associated with the system moving over the ridge and into northern Idaho. The airmass is warmer and should see highs in the upper 50s and 60s.
This time yesterday temperatures in Jackson, Josephine, and Curry County were 1-2 degrees warmer than at the same time today. Areas of Coos County are making up for this as temperatures are a few degrees warmer than yesterday at this time. Tonight, like last night, many areas will see temperatures plummet into the mid-30's west of the Cascades and some places in the Illinois and Applegate valleys could experience prolonged freezing temperatures (see the freeze warning products for more info), as well as temperatures just above freezing in portions of the Umpqua basin. While temperatures may be conducive to frost and in some locations freezing, it is uncertain if there is enough ambient moisture for moisture to actually deposit onto plants, cars and what not.
555 PM EDT Mon Apr 13 2020 Dry weather is expected tonight under high pressure, with diminishing wind. An upper level disturbance may provide precipitation mainly southeast of Pittsburgh Tuesday and Tuesday night, with some accumulation possible on the ridges. Most locations now have gusts below advisory criteria, and will be canceling the vast majority of the wind headlines, maintaining the ridges for now. Although much of the lower cloud will dissipate this evening, mid-level vorticity may aid in the generation of mid cloud overnight, some of which can be seen upstream moving into the middle Mississippi Valley, calling frost into question.
Look for the potential for temperatures to drop near or just below freezing for the next several mornings this week.
Otherwise, temperatures farther south will range from the lower to mid 40s for overnight lows across the rest of the area. Another cool night will follow on Tuesday night as high pressure builds across the region. With better radiational cooling conditions, expect temperatures to be even cooler than tonight with lows ranging from the mid and upper 30s to lower 40s.
High temperatures Tuesday will be a few degrees below normal followed by warmer daytime temperatures later this week. The showers were ahead of a mid/upper level positively-tilted trough axis that extended from the Great Lakes southwestward into northwest Arizona. The showers will end later this evening as the mid/upper trough axis moves east of the area. The highest speeds have been measured east of Tucson. At any rate, the gusty winds will diminish this evening as the mid/upper trough axis moves east of the area, and with the loss of daytime heating. A broad upper trough will prevail over the central/eastern CONUS by daybreak Tuesday. Meanwhile, an upper ridge axis will be positioned near the West Coast.
421 PM CDT Mon Apr 13 2020 For the beginning of this week, a longwave trough will dominate the region. Some convection and rain will linger off our coastal area through the week as a result a stalled trough off the east coast of the US.
Winds are expected to increase around daybreak Tuesday as another surge of high pressure arrives with winds speeds increasing to SCEC levels for Tuesday over the Gulf waters. A secondary push of cooler air will move into the region before daybreak. Gusty north should occur with secondary surge of high pressure for the coastal plains Tuesday morning.
Low temperatures tonight will drop to the lower 70s and upper 60s.
613 PM EDT Mon Apr 13 2020 A cold front will stall offshore tonight.
With the upper short wave trough exiting the region and colder air persisting at the surface, a little light snow may continue through the overnight hours across far east central Colorado into extreme west central Kansas from late this afternoon into the overnight hours.
612 PM CDT Mon Apr 13 2020 Winds will diminish this evening as high pressure edges southeast toward the mid Mississippi Valley. As a very cool air mass remains place, temperatures are expected to fall below freezing the next few nights over a large part of central Illinois.
410 PM CDT Mon Apr 13 2020 Primary weather impact this work week remains the unseasonably cold temperatures, with readings below freezing in many areas once again tonight.
946 PM CDT Mon Apr 13 2020 High pressure continues to build into the Mid-South tonight. Went ahead and issued a Freeze Watch earlier for much of West Tennessee where temperatures may drop to freezing and a Frost Advisory for the rest of the CWA.
However, high based MVFR cigs over the Srn sections of Ncntrl LA/Deep E TX across the lower Toledo Bend Country may try to spread back W towards the LFK terminal later this evening, and could linger through much of Tuesday morning before return to VFR. Otherwise, temperatures farther south will range from the lower to mid 40s for overnight lows across the rest of the area. Another cool night will follow on Tuesday night as high pressure builds across the region. With better radiational cooling conditions, expect temperatures to be even cooler than tonight with lows ranging from the mid and upper 30s to lower 40s.
/issued 238 PM CDT Mon Apr 13 2020/ Upper pattern has a broad trough extending southward from a low in Canada down across the middle of the country. This low will wobble east but the trough will be reinforced by another lobe rotating down across CA Tuesday.
Under it's influence the low stratus deck over the CWA was shunted off to the east, leaving mostly clear skies for a majority of the day. Through the remainder of the day and into the evening the high will slide into our immediate area, loosening the pressure gradient and drastically decreasing the winds. Low temperatures tonight will once again be near or below freezing across the bi-state area, though the exact extent of cooling is contingent on the interaction of a couple of variables. Operational model guidance handles advection scenarios well and is trending cooler, indicating that central and northeast Missouri and west- central Illinois will be below freezing. MRM Tuesday night starts with a s/w rounding the base of the upper trof.
522 PM MDT Mon Apr 13 2020 With the upper short wave trough exiting the region and colder air persisting at the surface, a little light snow may continue through the overnight hours across far east central Colorado into extreme west central Kansas from late this afternoon into the overnight hours.
1022 PM EDT Mon Apr 13 2020 A much cooler airmass will remain in place through much of the week, leading to below normal temperatures. With lighter winds, areas of frost/freezing conditions will be possible.
735 PM EDT Mon Apr 13 2020 A much cooler airmass will remain in place through much of the week, leading to below normal temperatures. The clouds will also make temps a little tricky tonight but in continued low level CAA, think they will at least make it down into the low to mid 30s. Will go ahead and issue a freeze warning across about the northern half of the area, where temperatures should have the best shot at dropping to or a little below freezing overnight. With lighter winds, areas of frost/freezing conditions will be possible.
745 PM EDT Mon Apr 13 2020 Dry high pressure will keep our area dry into Tuesday.
Lows tonight will range from the upper 30s far north to the low 50s far southeast. coastline appears to be more suppressed, based on recent guidance, even with a low pressure center tracking along its axis.
A mean layer ridge centered over the Western Caribbean has been displaced to the southeast. Broad high pressure centered over the northern Atlantic reaches well to the southwest to West Cuba. Temperatures are in the lower 80s with dewpoints in the upper 70s. The low level thermodynamic environment is less than stellar according to forecast soundings, so we will hold at 10%.
As a very cool air mass remains place, temperatures are expected to fall below freezing tonight and the next few nights over a large part of central Illinois.
624 PM CDT Mon Apr 13 2020 Primary weather impact this work week remains the unseasonably cold temperatures, with readings below freezing in many areas once again tonight.
So while temps are expected to remain largely above freezing where the precip occurs, frozen hydrometeors will stand a good chance making it to the ground given the dry sub-cloud conditions. Temps remain above freezing and thus travel impacts are not expected.
Tonight through Tuesday morning snow showers will become much more isolated, if any at all and winds will decrease to light and variable as a more relaxed pressure gradient takes over, and slightly warmer temperatures and slightly higher pressures approach from the west.
839 PM EDT Mon Apr 13 2020 Dry weather is expected tonight under high pressure, with diminishing wind. An upper level disturbance may provide precipitation mainly southeast of Pittsburgh Tuesday and Tuesday night, with some accumulation possible on the ridges.
910 PM EDT Mon Apr 13 2020 High pressure will briefly build overhead late tonight into Tuesday as the boundary stalls to the south.
/issued 356 PM CDT Mon Apr 13 2020/ A much different day was in store for southeast Texas and southern Louisiana behind the cold fronts that moved across the region late yesterday and this morning. Tonight temperatures are going to be running about 20 degrees cooler with lows in the 40s for cntrl La and near 50s down along the I-10 corridor.
An upper trough, centered over the Plains, covers the CONUS. At the surface, the CWA sits behind two cold front with the closest located over eastern Kentucky. To the west, high pressure is centered on the Kansas/Oklahoma state line. Tight pressure gradients between this high and a low over eastern Canada were the force behind the gusty winds this morning. Skies will continue to scatter as the high moves east building over the Ohio Valley.
735 PM EDT Mon Apr 13 2020 A cold front will move through today.
Cooler with a chance of mountain showers by the weekend. The pattern looks to be that the EPAC ridge will hold, allowing for mainly dry and warm weather through much of the week.
An active and much cooler than normal weather pattern is in store through the rest of the week with multiple chance for mainly light precipitation.
155 AM MDT Tue Apr 14 2020 Anonymously deep/cold upper level trough will continue to bring cold, unsettled, and breezy conds to the region the next few days. Main upper trough and associated cold pool is beginning to shift east with some WAA ongoing. The best chance for snow showers will again be over the higher terrain of NE WY and the Black Hills with isolated activity across other locations. Current indications are for up to an inch or so on the NE WY plains tonight into Wed morning, while a few inches will be possible in the higher elevations of the Black Hills today through Wednesday.
210 AM EDT Tue Apr 14 2020 A drier and cooler air mass will move into the North Country today on continued westerly winds.
Temperatures at this time are hovering close to freezing in the current warning area. It's likely that some sub freezing temperatures are occurring in the normally colder areas and will just let the warning ride at this time. High pressure over the central plains will keep winds from the northeast for the majority of the day.
Strong upper ridge centered offshore with a weather system moving over the top into southern BC. Temperatures are few degrees warmer as compared to this time yesterday however dew points are lower. Based on this and the high level clouds overspreading the region expect temps will be few degrees warmer than last night. Partly cloudy for Tuesday with mid and high level clouds associated with the system moving over the ridge and into northern Idaho. The airmass is warmer and should see highs in the upper 50s and 60s. Precipitation will mainly be rain, due to snow levels between 4500 to 5000 feet and possibly even a few hundred feet higher, but the highest elevations of Wallowas and Blues could see a light accumulation.
Warmer and drier weather returns at the end of the week. Tonight through Tuesday: The Inland Northwest remains under dry northerly flow aloft, sandwiched between a deep longwave trough over the Great Plains and an upper ridge off the coast. At this stage, it appears precipitation that falls across the lowlands should remain as rain, with an inch of snow or less falling at Lookout Pass.
256 AM EDT Tue Apr 14 2020 A cold front will slide well offshore this morning.
227 AM EDT Tue Apr 14 2020 A weak front will remain nearly stationary over our region through early Wednesday as a weak upper trough approaches, providing a chance of showers, with an isolated thunderstorm possible late today into early tonight. Expect fair and cooler conditions Wednesday afternoon.
This was occurring in west-southwesterly flow aloft ahead of a trough over the central CONUS. Under it's influence the low stratus deck over the CWA was shunted off to the east, leaving mostly clear skies for a majority of the day. Through the remainder of the day and into the evening the high will slide into our immediate area, loosening the pressure gradient and drastically decreasing the winds. Low temperatures tonight will once again be near or below freezing across the bi-state area, though the exact extent of cooling is contingent on the interaction of a couple of variables. Operational model guidance handles advection scenarios well and is trending cooler, indicating that central and northeast Missouri and west- central Illinois will be below freezing. MRM Tuesday night starts with a s/w rounding the base of the upper trof.
For the balance of this week, light to gentle winds are expected as a ridge of high pressure sags near our marine district.
With persistent northerly winds and reinforcing shots of cold air advection temperatures today will remain cool with readings in the low 30s. Tonight, yet another cold front will swing through, though upper- level ascent will be removed west and east of the area, so it should simply keep cold temperatures in place but bringing little to no precipitation.
The cold front is now well to the south and east but still seeing some post-frontal stratus lingering across extreme east Tennessee.
1139 PM CDT Mon Apr 13 2020 Primary weather impact this work week remains the unseasonably cold temperatures, with readings below freezing in many areas once again tonight.
By the late afternoon and evening, rain chances start to increase across the northern Plateau and SW VA as midlevel QG forcing with the trough and jet being to take effect. Warm ground temps should limit any accumulation to only the highest elevations, although the northern Valley could see a brief period of rain/snow mix. The trough axis and associated moisture/lift moves to our east by 12Z, ending any precip chances.
323 AM CDT Tue Apr 14 2020 The main concerns in the short term will be the continued chances for freezing temperatures as well as the chances for frozen precipitation. Wednesday night a warm front will begin to lift across the CWA.
For tonight, the main forecasting concern will be the possibility of multiple hours of sub-freezing temperatures across southcentral Missouri and the eastern Ozarks. Mid-level heights will begin to increase over the Ozarks beneath strong warm-air advection associated with a lifting warm front.
West side of the Pecos will be the dividing line with warmer temps creeping up into the 60s and 70s under more sunshine. Temperatures will begin to moderate after today with warmer, more seasonal airmass in place behind the vacating high pressure to the east.
/issued 946 PM CDT Mon Apr 13 2020/ High pressure continues to build into the Mid-South tonight. Went ahead and issued a Freeze Watch earlier for much of West Tennessee where temperatures may drop to freezing and a Frost Advisory for the rest of the CWA.
Clouds should hang around longer today resulting in cooler high temperatures though some sun may make an appearance later this afternoon. Temperatures will begin to rebound on Wednesday, with highs climbing back into the middle 60s across the forecast area as a 1024 mb high pressure system moves east across the southern Great Plains.
Highs will be in the low 50s and may not even leave the 40s for places that stay under cloud cover for most of the day. Places along I-65 and west could easily see temperatures dip below 32 degrees, but to the east of I-65 temps may hover right around the freezing mark. This should encourage dry and sunny skies and slightly warmer temperatures. A few clouds will build into the northern half of Middle Tennessee Weds night as the upper trough lifts to the northeast.
With the upper short wave trough exiting the region and colder air persisting at the surface, a little light snow may continue through the overnight hours across far east central Colorado into extreme west central Kansas from late this afternoon into the overnight hours. Even though the upper pattern keeps a large scale trough over much of the U. This will produce a period of less cloud cover and more sunshine along with warmer air moving into the region. Lows will be in the 20s with highs rising into the 40-50 range across the area on Tuesday and the lower 50s to lower 60s on Wednesday.
200 AM EDT Tue Apr 14 2020 A much cooler airmass will remain in place through much of the week, leading to below normal temperatures. With lighter winds, areas of frost/freezing conditions will be possible.
222 AM MDT Tue Apr 14 2020 High pressure will bring mainly dry weather to NE Montana this morning. Temperatures will be warmer today as the coldest air moves to the east. The high will move to the east this afternoon and the next storm system will move into Montana tonight. The precipitation will become widespread this evening across the SW part of the forecast area and change to snow as temperatures fall below freezing. At this point, the highest forecast snow total is around 2 inches for tonight and Wednesday which is not enough for a Winter Weather Advisory at this point.
Winds will again increase late in the period with a secondary surge of high pressure. Winds are expected to increase around daybreak Tuesday as another surge of high pressure arrives with winds speeds increasing to SCEC levels for Tuesday over the Gulf waters. A secondary push of cooler air will move into the region before daybreak. Gusty north should occur with secondary surge of high pressure for the coastal plains Tuesday morning.
So while temps are expected to remain largely above freezing where the precip occurs, frozen hydrometers will stand a good chance making it to the ground given the dry sub-cloud conditions. Temps remain above freezing and thus travel impacts are not expected.
249 AM CDT Tue Apr 14 2020 A broad longwave trough remains situated over the Great Lakes over the next 36 hours, with our region remaining in a northwesterly flow regime.
The pressure gradient continues to produce northeast flow and will continue to increase again in response to building surface pressures in the Ozarks into the lower OH and TN valleys. As the sheared wave/clouds depart to the east tonight, the pressure gradient slowly relaxes as a ridge shifts into KY/TN and northwest AL into northern MS. After another cool but sunny day Wednesday, the ridge shifts east over TN and AL and flow decreases more substantially.
While the low level wind fields will be substantially weaker, the depth of the mixed layer will still result in westerly wind gusts topping 20 knots at times. Lows tonight dipping just below freezing. Highs arriving in the low to mid 40s most locations - or a solid 10 to 15 degrees below average.
As a very cool air mass remains place, temperatures are expected to fall below freezing tonight and the next few nights over a large part of central Illinois. Winds have decreased sharply across central IL this evening as the strong low pressure system responsible for today's strong winds pulls farther away to the northeast and nocturnal cooling eliminates earlier gustiness. A disturbance embedded in the long wave trough over the region may produce a few snow showers over the northern portions of the state, but this looks to stay north of central IL. While locations north of there will be solidly below freezing tonight, the growing season has not advanced as far.
110 AM EDT Tue Apr 14 2020 A cold front will stall offshore tonight. Weak low pressure will develop along the front and move northeast Tuesday night into Wednesday, bringing clouds and patchy rain.