Aikyam-Lab/Synoptic-Bench huggingface dataset:
251 PM CST Tue Feb 18 2020 Stratus has begun to dissipate across the area this afternoon, as dry and very cold Arctic high pressure slowly drops south across the Upper Midwest. Despite a few inches of fresh snow on the ground from yesterday, increasing mid to high clouds overnight will likely keep temperatures several degrees warmer across southwest and south- central Minnesota. Winds will be fairly light as the center of the high pressure moves overhead tomorrow morning, but believe winds will still remain around 5-7 mph through sunrise before becoming calm during the morning.
A ridge of high pressure will sharpen over North Florida this afternoon.
bringing cooler and drier weather to central Illinois. to the lower 40s south of I-70.
slightly cooler air moves into N GA Wed night behind the frontal boundary with lows expected in the 30 and 40s.
316 PM EST Tue Feb 18 2020 Dry weather will return Wednesday through the weekend under high pressure. Latest surface analysis shows a cold front just beginning to move across eastern OH zones with rain quickly coming to an end behind the front with building high pressure. Rates will remain relatively subdued with another two tenths or so possible south and east of PGH before the front makes it east of the ridges by mid-evening.
This high will continue to drop south tonight and will be centered over western and central ND Wednesday morning. Although the high will be settling over the area Wednesday morning, there should be enough of a gradient to produce dangerous wind chills.
119 PM EST Tue Feb 18 2020 Cold front exits this evening.
908 AM PST Tue Feb 18 2020 Very quiet weather pattern today and for the next few days with high pressure in control, so just made a few minor adjustments to cloud cover and temps.
There is potential for slightly warmer temperatures than forecast this afternoon. Two limiting factors for the warmer scenario will be a cooling airmass and decreasing offshore flow. Temperatures across the interior could be in the lower 70s and not the forecast upper 60s.
1202 PM CST Tue Feb 18 2020 Cold front should be moving into the CLL area in the next couple hours and continue a slow swd mvmt thru the late evening hours. A cold front will be sagging into the area this afternoon and expect a broken band of showers and possibly embedded tstms to develop along the feature, say from very roughly Brenham-Trinity as it slowly makes its way southward. Temps are starting out in the low 70s and it shouldn't take much to warm closer to 80 south of the front so nudged temps up accordingly.
Scattered showers with possible isolated thunderstorms are expected to build this afternoon, with the highest chances for development occuring in northeastern Florida along the sea breeze convergence, west of I-75.
1049 AM CST Tue Feb 18 2020 Breezy and cooler conditions will develop today behind a cold front that moved through overnight. Below normal temperatures and dry conditions can be expected the next few days as high pressure builds into the area. a cold front had pressed southeastward to around the I-70 corridor in southeast IL with dry and breezy conditions in cold advection behind the front.
235 PM CST Tue Feb 18 2020 The afternoon surface analysis indicates a cold front placed well to the south of the county warning area (CWA), accompanied by brisk northeasterly winds at around 10-20 knots per West Texas Mesonet data. Temperatures have increased into the middle and upper 40s across the CWA this afternoon since the low stratus deck has dissipated. A strengthening high pressure system was also analyzed across the central Great Plains and is responsible for the shallow layer of cold air advecting into the CWA. As this high moves to the east-southeast, surface winds will shift to the east tomorrow which will moderate the daytime highs.
Otherwise, skies expected to become mostly clear this evening behind cold front before scattered high clouds spread back into northeast Oklahoma late tonight. An elongated, positive tilted upper trough, will move out of the central Rockies Wednesday night in conjunction with upper wave approaching from the southwest.
The other side of this system is the much cooler temperatures with highs in the single digits far north to mid 20 south.
A cold front will be sagging into the area this afternoon and expect a broken band of showers and possibly embedded tstms to develop along the feature, say from very roughly Brenham-Trinity as it slowly makes its way southward. Temps are starting out in the low 70s and it shouldn't take much to warm closer to 80 south of the front so nudged temps up accordingly.
850 AM PST Tue Feb 18 2020 Very quiet weather pattern today and for the next few days with high pressure in control, so just made a few minor adjustments to cloud cover and temps.
248 PM CST Tue Feb 18 2020 (Tonight through Wednesday Night) A recent cold frontal passage has brought cooler temperatures to the region.
1143 AM CST Tue Feb 18 2020 A cold front will slowly progress southward over the next 24 hours. A slow, southward advancing cold front will induce scattered to numerous showers across parts of central Louisiana and the piney woods region of southeast Texas beginning late this morning with the precipitation gradually working its way south through the evening and overnight hours as the front advances to near the coast before stalling.
The 12Z sounding from TBW showed a shallow veering wind profile in the low levels which infers warm air advection continues.
107 PM EST Tue Feb 18 2020 A cold front will move through the region today bringing cooler weather for the middle of the week. Late in the week high pressure will shift east of the region and there will be a warming trend into the weekend.
Mainly clear skies are expected tonight as an Arctic high pressure begins to build into the region.
Other instability showers are developing in the higher Black Hills, including around Custer and are expected to expand in coverage this afternoon.
High pressure in place over the Central Plains will build across the Ohio Valley through the work week. The next best chance for precipitation will be late in the weekend as low pressure in the southern plains pushes toward the Ohio Valley. Surface analysis this afternoon shows a cold front well east of Indiana. Lower clouds were still lingering across Central Indiana with some clearing of the lower clouds found across Illinois. Some of the lower clouds across Indiana should shift east tonight.
Otherwise quiet conditions are expected as high pressure moves in. Cold, high pressure conditions will continue across the region, with clear skies and quiet weather. Locations right along the lake shore may be a few degrees warmer. Wind chill headlines may be needed for some of the typically cooler counties in the western CWA.
320 PM EST Tue Feb 18 2020 Cool down beginning as high pressure builds in behind a cold front that now has cleared our Lake Cumberland region. Expect drier and cooler weather to prevail into the weekend as we remain under the influence of a large dome of Arctic high pressure slowly sinking southward across the central CONUS through the end of the week.
Fog has exited to the east around Midnight, with the cold front pushing into eastern Illinois. This regime will be reinforced by a much stronger high pressure in the next few days. With sun over snow free ground, temperatures will not be overly cool today, and highs in the lower to mid 30s should be widespread over snow free zones. Similarly tonight, the north is forecast to drop to the lower to mid single digits, while teens are widespread south.
Prevailing deep swly flow continues to promote moisture advection into the region this morning as a series of weak surface waves lift northeast along/ahead of a cold front across the Midsouth into middle TN. Pops will slowly decrease from the west tonight as drier high pressure advects in. CD Chattanooga Airport, TN 62 44 54 39 45 / 90 80 20 20 50 Knoxville McGhee Tyson Airport, TN 61 43 51 36 43 / 90 80 10 10 40 Oak Ridge, TN 59 40 52 36 43 / 90 70 10 10 30 Tri Cities Airport, TN 58 39 48 33 41 / 80 80 10 0 30.
1115 AM CST Tue Feb 18 2020 As of 09z this morning, surface analysis showed the cold front continuing to push through the St. Highs will range from the mid-30s over northeast Missouri and west-central Illinois to the low 40s across southeast Missouri and southwest Illinois.
/issued 555 AM CST Tue Feb 18 2020/ Ceilings and vsby cont to jump around a bit w/ ceilings varying from vv002 through ovc007 and vsby fm 1sm through P6SM this will continue through the mrng hours ahead of a cold front that is projected through early this eve. A slow, southward advancing cold front will induce scattered to numerous showers across parts of central Louisiana and the piney woods region of southeast Texas beginning late this morning with the precipitation gradually working its way south through the evening and overnight hours as the front advances to near the coast before stalling.
Most areas will experience slightly cooler temperatures and passing mid to high- level clouds this evening and overnight as a broad, shallow trough slowly slides eastward. However, the combination of increased, low-level moisture converging over the southeastern San Juans with mid-level lift brings the best chance for snow to areas east of the Highway 550 corridor. Dry air will quickly move in on this system's heels, as a ridge of high pressure builds in to our west. The end of the week will be quiet as a transitory ridge works across the Great Basin to the Great Plains.
703 PM EST Tue Feb 18 2020 A cold front will push southeast across the region this evening.
SW winds early will veer through the day and become NE across the nrn waters in the afternoon behind a prefrontal trough.
Most model guidance keeps the highest axis of snowfall just to the north of the forecast area, with portions of central Nebraska in the southern edge of the precip band. The highest totals are expected along and northwest of a line from Lexington to Columbus, Nebraska. Wednesday will be cold, but think there could be quite a gradient, with some guidance indicating that some of the north central Kansas counties reaching above freezing briefly.
The latest 24 hour trend reveals many locations running several decrease cooler than yesterday.
Cool down beginning as high pressure builds in behind a cold front that now has cleared our Lake Cumberland region. Expect drier and cooler weather to prevail into the weekend as we remain under the influence of a large dome of Arctic high pressure slowly sinking southward across the central CONUS through the end of the week.
528 PM CST Tue Feb 18 2020 Stratus has begun to dissipate across the area this afternoon, as dry and very cold Arctic high pressure slowly drops south across the Upper Midwest. Despite a few inches of fresh snow on the ground from yesterday, increasing mid to high clouds overnight will likely keep temperatures several degrees warmer across southwest and south- central Minnesota. Winds will be fairly light as the center of the high pressure moves overhead tomorrow morning, but believe winds will still remain around 5-7 mph through sunrise before becoming calm during the morning.
308 PM MST Tue Feb 18 2020 Tranquil conditions expected across the area during the next 36 hours as stronger ridging aloft builds across the western US.
451 PM CST Tue Feb 18 2020 Mostly sunny skies with streaks of high clouds are left in the wake of a cold front that passed through the region overnight. Attention turns to potential low-impact winter weather late Wednesday as an upper trough approaches the Central Plains, frontogenetical forcing will allow bands of snow to develop over Colorado, Nebraska, and Kansas Wed/Wed night.
336 PM CST Tue Feb 18 2020 Mostly sunny skies with streaks of high clouds are left in the wake of a cold front that passed through the region overnight. Attention turns to potential low-impact winter weather late Wednesday as an upper trough approaches the Central Plains, frontogenetical forcing will allow bands of snow to develop over Colorado, Nebraska, and Kansas Wed/Wed night.
320 PM CST Tue Feb 18 2020 A surface cold front passed through the I-40 corridor this morning and through Tupelo around 1 pm. Relief from the persistent rainfall will arrive with midlevel height falls this evening, which will drive the cold front and associated rain focus to the south.
700 PM CST Tue Feb 18 2020 A cold front has pushed through all of the TAF sites.
Cold front sagging south out of Montana and South Dakota this afternoon.
Despite this, north winds have kept highs in the low to mid 40s in northeast KS. Dry conditions persist tonight with temperatures falling into the low to mid 20s.
843 PM CST Tue Feb 18 2020 Lingering rainfall continues to gradually taper off to the east this Tue evening, as a cold front makes its way E/SE thru the cntrl TN Valley. Light rainfall will continue into the overnight period as the front exits and slightly cooler/drier air begins to spread into the region from the NNE. Current temps range from the mid 50s east to the upper 40s west, and should continue to fall into the lower 40s for most spots late tonight with the influx of cooler air. As an arctic high builds into the region, drier and cooler air will filter into the region. Daytime highs will be about 10 degrees cooler than Tuesday reaching the lower 50s.
Area radars showing the cold front across the far southeast portion of South Central Texas with light rain along and behind the boundary as overrunning is taking place above the shallow frontal passage.
At 750 PM CST, a cold front had moved through Middle Tn. NNW winds with gusts up to 20mph were bringing cooler air.
This feature, along with a northern stream trof digging into the ERN CONUS, will drive a stronger front through the area WED into into THU, with widespread showers followed by stronger CAA. High pressure prevails FRI and SAT as temperatures moderate and yes. A pacific upper low is progged to move quickly across the southern U.
/issued 248 PM CST Tue Feb 18 2020/ (Tonight through Wednesday Night) A recent cold frontal passage has brought cooler temperatures to the region.
Issued by National Weather Service St Louis MO 311 PM CST Tue Feb 18 2020 Quiet weather is expected tonight through Wednesday in the wake of a cold front which moved through the region last night. Given that SLRs are on the high side, even paltry amounts of QPF can produce accumulating snowfall. The resulting low pressure system produces a moderately strong H85 LLJ which then continuously transports moisture into SW MO over the weekend.
At 4 PM, an upper level trough was diving south through Montana, and a surface cold front stretched from northeast Colorado, through northern Nebraska and into southern Minnesota. The initial signs of this snow should materialize tonight as the aforementioned trough over Montana advances south, leading to an band of intense mid level lift near the NE/SD border. Ohh almost forgot, Wednesday will be the coldest day of the week (highs in the upper teens and mid 20s), enjoy! A warming trend will develop during the second half of the week as upper level ridging shifts eastward from the Rockies and southerly surface winds return.
A dry cold front will pass this evening with another burst of cold advection on nwly winds. Mainly clear skies are expected tonight as an Arctic high pressure begins to build into the region.
Ensemble 500mb heights show broadly dry northwest flow aloft to ridging unfolding for the balance of the week into the upcoming weekend.
1034 mb high is analyzed over eastern Montana this evening with ridging extending southeast across the mid Mississippi Valley. bringing cooler and drier weather to central Illinois. to the lower 40s south of I-70.
614 PM EST Tue Feb 18 2020 Showers will end this evening as a cold front exits. Dry weather will later tonight through the weekend under high pressure. Showers should continue along and ahead of a crossing cold front this evening. The rain could end as a brief period of snow as the front clears the higher terrain SE of PIT.
This disturbance will also bring a cold front across the area which will bring in colder air for the overnight into Wednesday.
Showers will move east through the area tonight as a weak disturbance rides eastward out ahead of a weak cold front tonight.
With this layer in mind move the higher pops and measurable snow a little farther north and increased chances and amounts.
Upper level ridge over the area with low level offshore flow tonight through Wednesday.
The big story these next few days will be strengthening valley inversions as high pressure builds over the region. The advent of recent snowfall will only serve to further enhance the typical impacts associated of high pressure over the Northern Rockies during this time of year. These include: * Freezing fog with periods of dramatically reduced visibility * Air quality issues * Cold morning temperatures The most obvious of these will likely be the cold temperatures, of which these next two days could be some of the coldest this winter (particularly since overall this has been a warmer than normal winter).
Other instability showers are developing in the higher Black Hills, including around Custer and are expected to expand in coverage this afternoon. Cold front will stall over the FA tonight with low clouds and flurries possible into Wednesday morning.
and will likely continue through the remainder of the work week as a trough located offshore evolves into a closed low and moves south toward SRN CA.
848 PM EST Tue Feb 18 2020 Showers will end this evening as a cold front exits. Dry weather will later tonight through the weekend under high pressure. The rain could end as a brief period of snow as the front clears the higher terrain SE of PIT.
/issued 320 PM CST Tue Feb 18 2020/ A surface cold front passed through the I-40 corridor this morning and through Tupelo around 1 pm. Relief from the persistent rainfall will arrive with midlevel height falls this evening, which will drive the cold front and associated rain focus to the south.
442 PM EST Tue Feb 18 2020 Low pressure will pass well to the north of the state today. The cold front associated with this storm will push across Central PA late today.
High pressure in place over the Central Plains will build across the Ohio Valley through the work week. The next best chance for precipitation will be late in the weekend as low pressure in the southern plains pushes toward the Ohio Valley. Just before 10 pm, temperatures across central Indiana were in the lower 30s, with dewpoints in the middle 20s to around 30 and light northwesterly winds. Satellite loop showed just a few stray clouds left across the area and those were moving out as high pressure built in. Some of the lower clouds across Indiana should shift east tonight.
/issued 235 PM CST Tue Feb 18 2020/ The afternoon surface analysis indicates a cold front placed well to the south of the county warning area (CWA), accompanied by brisk northeasterly winds at around 10-20 knots per West Texas Mesonet data. Temperatures have increased into the middle and upper 40s across the CWA this afternoon since the low stratus deck has dissipated. A strengthening high pressure system was also analyzed across the central Great Plains and is responsible for the shallow layer of cold air advecting into the CWA. As this high moves to the east-southeast, surface winds will shift to the east tomorrow which will moderate the daytime highs.
Quiet weather is expected tonight through Wednesday in the wake of a cold front which moved through the region last night. Given that SLRs are on the high side, even paltry amounts of QPF can produce accumulating snowfall. The resulting low pressure system produces a moderately strong H85 LLJ which then continuously transports moisture into SW MO over the weekend.
1046 PM MST Tue Feb 18 2020 Tranquil conditions expected across the area during the next 36 hours as stronger ridging aloft builds across the western US.
1218 AM EST Wed Feb 19 2020 High pressure will maintain dry weather, but with moderating temperature through the weekend.
1038 PM CST Tue Feb 18 2020 Stratus has begun to dissipate across the area this afternoon, as dry and very cold Arctic high pressure slowly drops south across the Upper Midwest. Despite a few inches of fresh snow on the ground from yesterday, increasing mid to high clouds overnight will likely keep temperatures several degrees warmer across southwest and south- central Minnesota. Winds will be fairly light as the center of the high pressure moves overhead tomorrow morning, but believe winds will still remain around 5-7 mph through sunrise before becoming calm during the morning.
Upper level ridge moves over the region tomorrow for dry conditions with temperatures remaining below normal.
1029 PM EST Tue Feb 18 2020 A cold front will push southeast across the region this evening.
Upper level ridging centered between western Cuba and the Yucatan Peninsula will remain stationary through the day. The ridge will then flatten out tonight and begin to retrograde to the west overnight. At the surface, an area of low pressure was moving to the northeast to the north of Maine, with a surface cold front across north central Georgia. Strong high pressure diving southeast across the northern Plains will help nudge the weak frontal boundary southward into the area today. Isolated to widely scattered light showers are possible across northeast Florida tonight in the low level northeasterly flow. Highs today will be in the low to mid 70s across southeast Georgia and the upper 70s to mid 80s across northeast Florida.
1053 PM CST Tue Feb 18 2020 Mostly sunny skies with streaks of high clouds are left in the wake of a cold front that passed through the region overnight. Attention turns to potential low-impact winter weather late Wednesday as an upper trough approaches the Central Plains, frontogenetical forcing will allow bands of snow to develop over Colorado, Nebraska, and Kansas Wed/Wed night.
159 AM EST Wed Feb 19 2020 Cold air is filtering into the state as high pressure slowly expands from the Rockies and northern Plains states. The high pressure will eventually cover all of the contiguous states.
Post frontal precipitation building in behind the Great Valley positioned cold front. CD Chattanooga Airport, TN 52 40 43 27 47 / 10 30 70 10 0 Knoxville McGhee Tyson Airport, TN 50 36 39 23 43 / 20 10 60 20 0 Oak Ridge, TN 50 35 41 24 45 / 10 10 50 20 0 Tri Cities Airport, TN 47 32 39 20 42 / 10 10 40 20 0.
1257 AM EST Wed Feb 19 2020 A cold front will push southeast across the region this evening.
Fresh to briefly strong east-southeast breezes prevail in the Straits and the lower half of Hawk Channel right now, supporting the SCEC headline in the Coastal Waters Forecast there.
/GG/ A large area of light to moderate rain continues this evening as a cold front sags southward through the ArkLaMiss region.
The low and mid clouds are expected to clear out to the southeast this morning, while scattered cirrus continue streaming over central KY. Sounding profiles do show a saturated DGZ with surface temperatures hovering near the freezing mark, so wouldn't be surprised to see a few snow flakes at first before turning to all rain by late morning/early afternoon.
Forecast largely on track this evening with only a minor update to include the mention of patchy fog/freezing fog across south Sound and SW interior toward daybreak Tuesday.
Light showers expected across the remainder of the area as isentropic ascent pattern dominates under a shallow and cooler airmass in the wake of the cold front. Overnight lows to reach the lower 40s across the Hill Country to lower 50s rest of the area. Area radars showing the cold front across the far southeast portion of South Central Texas with light rain along and behind the boundary as overrunning is taking place above the shallow frontal passage.
These clouds will thin on Wednesday as a weak ridge moves inland.