Aikyam-Lab/Synoptic-Bench huggingface dataset:
In doing so, a southwesterly low level flow of 30-40kt will develop in coincidence with a good 8h thermal ridge across the southern Plains into the lower OH Valley. The pressure gradient will tighten up from the southern Plains into the lower TN and OH valleys as a result.
The stubborn sfc trof just hung around too long keeping the pres grad weak. Winds at MCK and a mesonet since in Cambridge suggest it's still a good idea to hang onto Furnas county until expiration at 23Z. With the clds it will be decidedly cooler than today. The lowest confidence element is VSBY.
Considering the unstable atmosphere developing this afternoon, there is good chance of strong bursts of snow/rain to develop and move off the high terrain, temporarily reducing visibility.
This lift and associated pcpn will progress due east tonight, but on the southwest flank of this forcing lies a cold front supplying another avenue of lift and pcpn.
The large scale pattern features an anomalous ridge that will move slowly east and amplify further through the short term period. On its northwest periphery, and downstream of a fairly significant trough, strengthening downslope west-southwesterly flow will result in the warmest temperatures of the season so far tomorrow.
123 PM EDT Wed Mar 25 2020 Weak low pressure crossing the region will drag a cold front through the forecast area this morning. Dry and mild weather will return this afternoon as a high pressure begins to ridge in from the west.
As mentioned for the last few days this system is proceeded by a broad/well defined upper ridge of high pressure which stretches from east TX to the FL peninsula and western Atlantic by 12z Thu. Thu will be mostly sunny with daytime temps near record levels or a few degrees warmer compared to today and yesterday. High temps today will top out in the lower to middle 80s for most inland locations and the mid to upper 70s along the immediate coast.
1128 AM EDT Wed Mar 25 2020 Weak low pressure crossing the region will drag a cold front through the forecast area this morning. Dry and mild weather will return this afternoon as a high pressure begins to ridge in from the west.
A trough of low pressure is moving through the region over the next couple of days.
An unsettled spring time weather pattern will persist through the rest of the week with occasional rain and snow showers, breezy conditions and cooler than normal temperatures. Bands of snow and rain were rotating around an elongated low pressure trough between Spokane and Pullman. /GKoch 18Z TAFS: Bands of snow and rain continue to circulate around low pressure over southeast Washington. The band around Spokane and Coeur d'Alene appears to be breaking up as the low drifts south.
As for temperatures, lows tonight are progged to range from the low 40s along the I-70 corridor to low 50s along the KS/OK border.
High pressure is positioned to our north and will continue to drift eastward later this evening with northwest flow aloft. Upstream ridging will continue to build and move east across the southern CONUS with time as well. With ample sunshine, southerly low-level flow, and a strengthening deep- layer ridge across the Deep South tomorrow, highs will make a run for the mid to upper 80s.
A more robust line was centered over the Lower Keys. Otherwise, winds have remained from the southwest and temperatures have risen a few degrees into the lower to middle 80s.
A warm front lifts across Illinois Thursday, bringing warmer temperatures to the Midwest. As High pressure sits of the se coast of the US, southerly winds will lift through the Mississippi River Valley to the Midwest, as a warm front Thursday afternoon. The warm frontal boundary will slide south once again, stalling across southern Illinois.
An unsettled spring time weather pattern will persist through the rest of the week with occasional rain and snow showers, breezy conditions and cooler than normal temperatures. With the cold trough overhead (500mb temps about -34C), precipitation bands have been convective leading to localized accumulations of 2 to 4 inches or more. /GKoch 12Z TAFS: An upper level closed low centered near KPDX at 12Z will weaken and track southeastward into the Great basin by 12Z Thursday. Ahead of this low pressure moisture is advecting into Eastern Washington and promoting a deformation band of snow showers across the rising terrain of the eastern Columbia Basin while drier air funnels down the Okanogan Valley into the western Columbia Basin.
High pressure will build in behind the system and bring dry weather for Thursday. With temperatures generally in the upper 30s and low 40s, it is looking unlikely for any snow to mix in apart from the higher elevations of the Catskills, where temperatures struggle to climb out of the low and mid 30s this afternoon. Light rain comes to an end tonight with this wave moving out of the area and high pressure builds in. A diffuse area of low pressure moving through the Great Lakes will keep our weather unsettled.
258 PM EDT Wed Mar 25 2020 High pressure builds over the area tonight.
157 PM EDT Wed Mar 25 2020 Low pressure passes well south of New England tonight and Thursday.
1139 AM MDT Wed Mar 25 2020 Positively tilted trough is laying across the Canadian Rockies back to the PacNW Coast this morning. There is cold air trapped in this trough which is creating a strong thermal gradient across the Intermountain West to the Central High Plains and why there is a 170+kt jet overhead. This trough will make slow progress to the East during the short term leaving us in a Southwest flow pattern aloft. This feature weakens through the morning but the surface cold frontal boundary will be the focus for precipitation and a temperature gradient over the next 24 to 36 hours before the main trough swings through. For this reason the highest chances for precipitation will be near the Wyoming border and colder temperatures forecast in this same region.
Temperatures as of 2 PM this afternoon range from the low 90s along the Rio Grande to the upper 70s in locations in which the fog and stratus have only recently cleared.
South winds will increase to 15-20 mph tomorrow helping to usher a warmer airmass into the Midsouth.
High pressure will build into the area for the weekend. This trend will be temporary however, as the upper trough currently along the Pacific Coast begins to slowly translate inland and across the Great Basin through Thursday. As this occurs precipitation should increase once again along the stalled boundary as convergence becomes enhanced this evening, with the band slowly shifting south overnight into Thursday as the positively tilted upper trough makes its way through the region.
Upper ridge centered in the wcntl Gulf should suppress rain chances.
Tonight and Thursday The approach of a strong jet in diffluent upper flow and a couple waves moving along a slow moving cold front will produce a moderate rainfall across most of the area this afternoon and evening. It should change to wet snow before ending across the far north, but accumulations look to be less than earlier anticipated due to warmer boundary layer temperatures. High temperatures should be close to normal for this time of the year, including the cooler temperatures near the bay and lake.
Warmer and dry in the short term. Clouds will diminish from west to east today, allowing temperatures to rise to highs ranging from the mid 60s east to the low 70s west.
Lows tonight will be warmer as south winds will keep low level moisture in the area, so lows will only drop into the upper 50s to lower 60s.
Ridging continues to build in from the west overnight and tomorrow. The extended fcst period kicks off on Thursday night amidst H5 ridging across the southeast CONUS while troughing prevails over the Rockies. At the surface, a large region of high pressure will be sliding east atop the Great Lakes while another ridge sets up over the Western Atl, both combining with weak cyclogenesis over the plains to support sly flow across the Deep South.
106 PM CDT Wed Mar 25 2020 (Today and tonight) As ridging builds in and 850mb flow turns westerly, today will see above normal temperatures and breezy winds.
Did add a slight chance of snow to far northwest and far north central North Dakota tonight as a trough moves along the Canadian border. Currently, high pressure is centered over southern Manitoba. This activity has diminished as it moves into stronger high pressure over ND, but an isolated snow shower is possible this afternoon and evening over northwest ND. On Thursday a weak cold front moves into central North Dakota and stalls. It will be warmer on Thursday with highs mainly in the 40s.
810 PM EDT Wed Mar 25 2020 Latest RAP model has mid/upper level ridging on the northeast Mexican coast this evening that tracks out over the Gulf of Mexico during Thu. High pressure along the eastern sea board begins to build across FL and over the Gulf of Mexico Thu. The low clouds and fog lift and burn off around 9 am with partly cloudy skies during the rest of the day. High pressure provides northwesterly winds at 15 knots or less through Thu although waters north of Tarpon Springs will see 15 to 20 knots tonight.
520 PM MDT Wed Mar 25 2020 The longwave trough along the west coast will sweep inland during the next 24 hours, helping to push what's left of last night's front away from the region.
740 PM EDT Wed Mar 25 2020 High pressure builds over the area tonight.
Afternoon satellite depicts well the center of a low pressure system currently located near Pullman, WA. Organized bands of showers have been observed near the center of the low in Eastern WA and around the Columbia River while rain and snow showers extend from the Bend, OR region east and north through the Ochoco, Blue, and Wallowa Mtns. This afternoon and evening, convective activity will continue, particularly in rough elevated terrain of the southern and eastern mountains and in areas near the center of the low.
Meanwhile, low pressure will cross the Great Lakes into Quebec, dragging a weak cold front across the area by Thursday evening. Initial rainfall with this front should remain north of the area, closer to the low where better forcing for ascent is progged.
604 PM EDT Wed Mar 25 2020 A cold front moving through will bring drier weather later through Thursday. Much warmer temperatures are on tap for the weekend as high pressure becomes established offshore.
537 PM MDT Wed Mar 25 2020 Easterly upslope flow has resulted in widespread fog and areas of drizzle/freezing drizzle in the eastern BH foothills and adjacent plains. Main upper low/trof located over the Pac NW building into the northern Rockies.
631 PM CDT Wed Mar 25 2020 A cold front has just exited southwest Nebraska with northwest winds 10 to 20 mph with gusts up to 30 mph. Highs Thursday should range from the mid 40s northeast half to the low to mid 50s southwest. Thursday night, the upper trough will move across the Great Basin with the upper flow become more southwesterly overnight.
637 PM CDT Wed Mar 25 2020 High pressure will continue over the area through the period.
951 PM EDT Wed Mar 25 2020 A cold front moving through will bring drier weather later through Thursday. Much warmer temperatures are on tap for the weekend as high pressure becomes established offshore.
946 PM CDT Wed Mar 25 2020 The low level clouds have continued to scour out, even more than expected. A cold front will move out of Canada and stall over the southern zones Fri night.
Greatest shower coverage will be between now and mid evening, but should see isolated snow showers linger thru the night, again per the trof and instability in place. Upper trof will begin to fill but remain overhead on Thursday. Thursday night will be dry underneath flat ridging.
/issued 218 PM CDT Wed Mar 25 2020/ An upper trough extended from WA to CA this morning with a ridge over Mexico and the Western Gulf.
548 PM MDT Wed Mar 25 2020 The pattern, which features a positive tilt mid-level trough over the West and a stationary front across northern Utah and southwest Wyoming, will be quasi-stationary over the next three periods. Meanwhile, a strong jet on the leading edge of trough aligned just south of front will bring periodic disturbances which when combined with lingering moisture will bring periodic showers to the northern most zones of the forecast area tonight through Thursday night.
554 PM EDT Wed Mar 25 2020 Dry and mild weather will continue tonight as high pressure begins to ridge in from the west.
Temperatures will once again reach the 60s across the plains, although the far northeast corner will be cooler with areas of morning fog, light drizzle, and stratus deck behind a weak frontal surge tonight.
The positively-tilted upper level trough continues to make its way slowly south east with the axis making its way into far northern California early this afternoon. Showers will linger tomorrow as ensembles show the trough axis finally making its way through interior NorCal. Expect Valley low temperatures in the 30s, some near freezing, and mountain low temperatures in the single digits to 20s.
658 PM EDT Wed Mar 25 2020 A cold front moving through will bring drier weather later through Thursday. Much warmer temperatures are on tap for the weekend as high pressure becomes established offshore.
High pressure will be centered just to the north and east of the forecast area overnight. Clear skies and light winds will lead to radiational cooling conditions with most locations dropping down into the low to mid 40s for most locations. This high will shift to the east throughout the TAF cycle with southerly winds expected after 16-18z. Ridging continues to build in from the west overnight and tomorrow. The extended fcst period kicks off on Thursday night amidst H5 ridging across the southeast CONUS while troughing prevails over the Rockies. At the surface, a large region of high pressure will be sliding east atop the Great Lakes while another ridge sets up over the Western Atl, both combining with weak cyclogenesis over the plains to support sly flow across the Deep South.
1019 PM EDT Wed Mar 25 2020 Low pressure passes well south of New England tonight and Thursday.
a cold front will back into the area this evening and continue through Thursday morning before stalling as a warm front somewhere extending from Yuma to Goodland and Gove. On the cooler side of the front high temperatures will be in the mid 50s to mid 60s.
A cold front will move out of Canada and stall over the southern zones Fri night.
727 PM EDT Wed Mar 25 2020 Low pressure passes well south of New England tonight and Thursday.
The positively-tilted upper level trough continues to make its way slowly south east with the axis making its way into far northern California early this afternoon. Showers will linger tomorrow as ensembles show the trough axis finally making its way through interior NorCal.
Hobby airport tied the record at 88 for the high temperature.
The upper trough that supported the showers today will shift east on Thursday and allow for mostly dry conditions with just a slight chance of afternoon showers in the Boise Mountains and Owyhees.
739 PM CDT Wed Mar 25 2020 Warmer weather will prevail over the next few days, though rain and scattered thunderstorms will become more numerous with time.
Southerly winds of 5 to 10 miles per hour tonight should allow for enough mixing to keep temps a tad warmer than initially forecast.
Earlier this afternoon, there was a well-defined reverse cloud line over the Lower Keys thanks to increasing solar insolation and light southwest winds blowing favorably parallel to the island chain.
Cold front near the Fl-Ga line will stall out tonight before moving through as a backdoor front Thursday morning.
The cold upper level trough to the west of Utah will slowly advance east into the state by late Thursday.
Per surface map, minor pressure falls in southern Canada and into north central North Dakota is indicative of a weak surface cold front.
241 AM EDT Thu Mar 26 2020 High pressure will bring a quiet, partly sunny day to NY and PA through early afternoon, before a frontal system settling over the region sets off scattered rain showers. Temperatures will drop into the upper 30s along the NY/PA border, but cooler readings to the north and east will allow wet snow to mix with the rain showers.
1137 PM CDT Wed Mar 25 2020 Warmer weather will prevail over the next few days, though rain and scattered thunderstorms will become more numerous with time.
1033 PM MDT Wed Mar 25 2020 Easterly upslope flow has resulted in widespread fog and areas of drizzle/freezing drizzle in the eastern BH foothills and adjacent plains. Main upper low/trof located over the Pac NW building into the northern Rockies.
Latest GOES-East imagery shows clear sky across the CWA save for lingering cloud cover over the MD/WV ridges. Meanwhile, low pressure will cross the Great Lakes into Quebec, dragging a weak cold front across the area by Thursday evening. Initial rainfall with this front should remain north of the area, closer to the low where better forcing for ascent is progged.
1150 PM CDT Wed Mar 25 2020 Latest fog/stratus imagery loop, surface observations, and radar indicates clouds and flurries scooting along the northern border associated with a weak cold frontal passage. Did add a slight chance of snow to far northwest and far north central North Dakota tonight as a trough moves along the Canadian border. Currently, high pressure is centered over southern Manitoba. This activity has diminished as it moves into stronger high pressure over ND, but an isolated snow shower is possible this afternoon and evening over northwest ND. On Thursday a weak cold front moves into central North Dakota and stalls. It will be warmer on Thursday with highs mainly in the 40s.
259 AM MDT Thu Mar 26 2020 WV imagery tonight clearly depicts a positively tilted upper trof with an axis extending from srn AB/SK to near the CA coast. Broad area of ascent associated with an upper jet and low-to-midlevel baroclinic zone is evident downstream of the trof base. Generally, Q-vector conv should increase across wrn SD through the day as low-level WAA overspreads the area, we remain roughly in the left exit region of the midlevel jet to our south, and the midlevel trof axis approaches.
The upper trough is expected to be over/near the Four Corners region by tomorrow afternoon.
Isolated to scattered light rain/snow showers will continue today, gradually decreasing from northwest to southeast as upper trough axis passes over us.
This front will continue to sink south towards the southern CWA stalling near the Highway 50 corridor.
High pressure will be centered just to the north and east of the forecast area overnight. Clear skies and light winds will lead to radiational cooling conditions with most locations dropping down into the low to mid 40s for most locations. CD Chattanooga Airport, TN 73 60 83 63 78 / 0 0 10 10 30 Knoxville McGhee Tyson Airport, TN 73 59 80 63 79 / 0 0 10 10 20 Oak Ridge, TN 73 59 80 62 77 / 0 0 10 10 20 Tri Cities Airport, TN 71 52 76 58 79 / 0 0 20 10 10.
Coupled with a light downslope wind south of an approaching frontal boundary and a reasonable amount of sun, temps should be several degrees warmer this afternoon, with upper 80s and lower 90s likely in a corridor just south of the eventual front location this afternoon, which may drop about as far south as I-44.
1156 PM MDT Wed Mar 25 2020 The pattern, which features a positive tilt mid-level trough over the West and a stationary front across northern Utah and southwest Wyoming, will be quasi-stationary over the next three periods. Meanwhile, a strong jet on the leading edge of trough aligned just south of front will bring periodic disturbances which when combined with lingering moisture will bring periodic showers to the northern most zones of the forecast area tonight through Thursday night.
219 AM EDT Thu Mar 26 2020 A weak cold front will move southeast from the Great Lakes region today, then lay out west to east and become stationary across Pennsylvania late this week. This front will be the focus for several waves of low pressure to ride along and provide multiple opportunities for rain this weekend. The cold front approaching from the NW should arrive late in the day over Warren Co and slow as it continues to move S.
353 AM CDT Thu Mar 26 2020 Today and Tonight: Anomalous mid/upper level ridge over the southeastern CONUS and Gulf of Mexico will provide for abnormally warm temperatures today. With the clearest skies, weakest winds and driest air remaining in the east tonight, minimums will fall into the lower 60s.
1253 AM CDT Thu Mar 26 2020 A cold front has just exited southwest Nebraska with northwest winds 10 to 20 mph with gusts up to 30 mph. Highs Thursday should range from the mid 40s northeast half to the low to mid 50s southwest. Thursday night, the upper trough will move across the Great Basin with the upper flow become more southwesterly overnight.
334 AM EDT Thu Mar 26 2020 Low pressure will track southeast of the region today.
Stationary boundary across SE AL and SW GA will lift northward today and out of our CWA by early this afternoon in response to an area of low pressure moving across the midwest. Mid level ridging will take hold from the central Gulf of Mexico causing thickness values to increase which indicates an overall warming trend.
A weak cold front will bring a slight chance for showers Thursday evening.
(Today and tonight) Temperatures are expected to soar to near record levels today under the influence of upper level ridging and downslope flow.
To the south, an upper level trough off the CA coast will move into the Desert Southwest on Fri. Upper level ridge building will occur downstream over the Northern Plains.
352 AM CDT Thu Mar 26 2020 High clouds continue to stream across the Mid State this morning as an upper ridge builds overhead.
1024 PM MDT Wed Mar 25 2020 The longwave trough along the west coast will sweep inland during the next 24 hours, helping to push what's left of last night's front away from the region.
244 AM EDT Thu Mar 26 2020 High pressure brings a pleasant day today. A cold front drops in from the northwest tonight with any showers limited to northern areas.
413 AM EDT Thu Mar 26 2020 High pressure with dry conditions today will give way to rounds of showers and isolated thunderstorms through the weekend. Transient high pressure will provide dry weather through much of today.
320 AM EDT Thu Mar 26 2020 Current GOES-16 Nighttime Microphysics imagery shows a good amount of cirrus spilling over the mid CONUS ridge with some river valley fog already evident in eastern KY. In doing so, pressure gradient will tighten between this low and the East Coast high resulting in gusty SSW winds this afternoon (25-30mph possible at times).
1202 AM CDT Thu Mar 26 2020 Latest fog/stratus imagery loop, surface observations, and radar indicates clouds and flurries scooting along the northern border associated with a weak cold frontal passage. Did add a slight chance of snow to far northwest and far north central North Dakota tonight as a trough moves along the Canadian border. Currently, high pressure is centered over southern Manitoba. This activity has diminished as it moves into stronger high pressure over ND, but an isolated snow shower is possible this afternoon and evening over northwest ND. On Thursday a weak cold front moves into central North Dakota and stalls. It will be warmer on Thursday with highs mainly in the 40s.
142 AM EDT Thu Mar 26 2020 A weak cold front will move southeast from the Great Lakes region today, then lay out west to east and become stationary across Pennsylvania late this week. This front will be the focus for several waves of low pressure to ride along and provide multiple opportunities for rain this weekend. The cold front approaching from the NW should arrive late in the day over Warren Co and slow as it continues to move S.
The Keys are on the outer edge of a pressure trough and washed out cold front associated with a mature mid-latitude cyclone off the New England coast. By tomorrow the western North Atlantic ridge axis begins to work its way back into the Florida Peninsula, bringing east to southeasterly breezes back into the Keys region.