Aikyam-Lab/Synoptic-Bench huggingface dataset:
Some clouds streaming across portions of NorCal from a low pressure system offshore. The parial cloud cover has kept our 2 pm temperatures cooler than yesterday afternoon. Valley highs right now are ranging from the mid 80s to mid 90s which is about 2-6 degrees cooler than 24 hours ago. however, high pressure over the western US will begin strengthening on Friday. By this weekend, the high will dominate NorCal and the low pressure offshore will get pushed northward away from our region.
222 PM EDT Thu Aug 24 2017 A cold front in the forecast area this afternoon will stall just off the coast tonight.
313 PM EDT Thu Aug 24 2017 High pressure and a seasonably cool airmass will be in place across the region through Friday, before it works off to the east over the weekend. With the airmass modification and the lingering cloud cover, went with lows in the lower to mid 50s tonight. Lows Friday night will be a few degrees warmer, in the upper 50s to lower 60s. The center of high pressure over the Great Lakes will move off to the east over the weekend, but it will continue to extend/influence our weather with dry conditions.
517 PM EDT Thu Aug 24 2017 A weak cold front is expected to generate spotty showers today with below normal temperatures. The weekend weather will feature cool and dry conditions under the control of high pressure. High pressure building south from the Great Lakes will keep the fall like weather going.
Additional storms have been intermittent in the waters south of the Lower Keys and the Dry Tortugas. There have been locations along the island chain rain-cooled into the lower 80s, but in general, temperatures have been able to approach the upper 80s. A relatively weak but persistent trough will remain discernable across the Florida peninsula, and stretched most likely along and to the west of the Keys island chain through the next couple of days. This trough will lift north/northeastward through late in the weekend and is expected to elongate off the southeast coast while intensifying through the first few days of next work week. By then, ridging will slowly but steadily reach westward across the Keys and then slightly northward across the Florida peninsula. A weak trough will linger near South Florida through at least this weekend.
A dry cold front will be passing through the forecast area today but then stall from western Montana back towards south central Oregon. Behind the front temperatures will be 5 to 10 degrees cooler and some locally breezy conditions. Elsewhere, a smoke layer aloft continues to shift east due to a cold front gradually moving east and southeast across the region.
High pressure remains in control leading to clear conditions and light winds tonight. High pressure remains centered to our north with light winds out of the NE. Therefore, expect max temperature to be very similar to Thursday with highs across southern portions of the area being about a degree warmer on Friday with slightly higher 850mb temperatures expected to return in these areas.
For Friday through the weekend, building high pressure will provide mainly dry and cool weather. Canadian high pressure at the surface will settle over the area this weekend.
Sunshine most areas with highs in the low to mid 70s.
240 PM CDT Thu Aug 24 2017 Sunny skies and tranquil wx conditions prevail across the cntrl TN Valley this Thu afternoon, as afternoon temps again trend slightly below normal with readings mainly in the lower/mid 80s. Strong area of high pressure continues to build ewd into the Midwest/OH Valley states, thereby helping with the nice wx across the local area today. Temp trends should again quickly fall off into the 70s this evening and then into the lower 60s by early Fri morning under predom clr skies. After another seasonably cool morning Sat in the lower/mid 60s, moisture/cloud cover will begin to gradually increase over the mid TN Valley, as the high pressure shifts ewd towards the mid Atlantic Basin and the sfc flow veers to the E/SE during the day Sat.
329 PM CDT Thu Aug 24 2017 High pressure building southward across the midwest this afternoon. Current temps are in the upper 70s Plateau to the lower 80s elsewhere. Dry weather to prevail over the next few days as the aforementioned high pressure area moves slowly eastward. Thermal troughing will remain anchored along the mid Atlantic states into the weekend as well.
1222 PM CDT Thu Aug 24 2017 The longwave trof will persist across eastern NOAM through tonight, with some deepening into the Great Lakes and OH Valley today as a well-defined short wave trof digs from the western Great southeastward within the northwest flow aloft. Temperatures today will be a tad warmer than yesterday, but along with the dew points, will still be below average for late August. High pressure centered to the east will still dominate the surface/lower trop tonight resulting in light winds, low dew points, and below average temps.
129 PM EDT Thu Aug 24 2017 A cold front in the forecast area this afternoon will stall just off the coast tonight.
255 PM MDT Thu Aug 24 2017 Current surface analysis shows weak frontal boundary/trough stretching south across the Black Hills area. Upper level analysis shows weakening ridge centered over the northern high plains. Highs will be in the 80s across the plains, with 70s over the higher Black Hills. Winds will switch to the north-northwest from west to east as the trough moves across the area.
Today will be a bit warmer as slightly warmer 850mb air works in concert with abundant sunshine and a drier air mass.
Clear skies and tranquil wx conditions prevail across the cntrl TN Valley this Thu morning, as temp trends rebound into the lower 70s from their earlier lows ranging mainly from the upper 50s/lower 60s. Strong area of high pressure is currently making its way ewd into the Midwest/OH Valley states, and should continue to result in fair wx conditions later today. Mostly clear skies will help temps fall into the lower 60s and even the upper 50s in southern middle TN tonight. Winds will become northeasterly and temps just a tad warmer.
342 PM CDT Thu Aug 24 2017 High pressure to our east with southeasterly winds over the fcst area 5 to 15 kts. But 12z data shows bulk of lift and main warm front farther south with higher chances for precipiation late tonight into Friday east central SD into the Twin Cities region.
Hot and dry weather conditions are continuing this afternoon across northeast Montana ahead of an approaching cold front. Highs are topping out into the low to middle 90s across the area with gusty south to southeast winds. The forecast is picked up Friday night with an upper trough well to the north and upper high pressure well to the south. There is an embedded disturbance in the flow, associated with the Canadian trough, that will ride through just north of our area causing a weak boundary to fluctuate.
Latest runs of the HRRR as well as UA WRFs and other convective allowing models suggest it should be a quiet night across the lower elevations.
428 PM CDT Thu Aug 24 2017 Another cool night on tap with high pressure, clear skies, and light winds forecast. Warmer temperatures will be found in central Minnesota where lows will be in the low 50s. Clouds start to build in from the south Friday morning due to isentropic ascent along a warm front over western through southeast Minnesota. Temperatures will trend cooler for areas under clouds and rain, with slightly warmer conditions where mainly sunny to partly cloudy skies persist through afternoon. Highs in central Minnesota will be in the middle 60s to the low 70s in north- central Minnesota and around 70 degrees in north-central Wisconsin.
310 PM CDT Thu Aug 24 2017 1024 mb high pressure over western Ontario and ridging southward over western IL and mid MS river valley, will drift over the Great Lakes region during tonight and Friday and continue dry and less humid conditions (dewpoints in the 50s) over central/se IL rest of this week. An upper level trof will remain over the Great Lakes and ohio river valley into Friday with upper level ridging into the high plains putting IL in a nw upper level flow. Lows overnight in the low to mid 50s, coolest from I-74 ne where less mid level cloud cover expected. Nearby high pressure will keep winds fairly light generally less than 10 mph.
A few storms are expected to form along this trough this afternoon and slide eastward this evening. As for temperatures, lows tonight look to dip into the low to mid 60s with highs tomorrow reaching into the mid to upper 80s. An upper level ridge of high pressure will intensify above Southwest United States with a long wave trough over the eastern United States.
356 PM EDT Thu Aug 24 2017 The trough of low pressure near the west coast of the Florida peninsula continues to produce a disorganized area of showers and thunderstorms over South and Central FL. The model guidance continues to show a very aggressive solution with the GFS and ECMWF having the low level flow veering to the south to southwest through Friday as the low pressure shifts northeast across Central Florida into the Atlantic by this weekend.
Temps to top out a bit cooler than earlier in the work week.
A weak wave will graze the UT/ID border Friday prior to High pressure strengthening across the Great Basin over the next several days thereafter.
Temperatures were in the upper 70s and lower 80s this afternoon, with dewpoint temperatures in the low to mid 50s. Lows tonight will drop into the mid/upper 50s, although low lying areas will likely dip into the lower 50s in a few spots. Highs on Friday will remain cooler than normal, generally in the 76-82 degree range. as a narrow, high-amplitude upper ridge slides east across the Great Lakes.
Mid- to upper-level ridging will build over the Northland today, bringing abundant sunshine and dry conditions. Temperatures will once again be on the cooler side of climatology, with highs in the lower 60s over the Minnesota Arrowhead region, to the upper 60s further inland. Chances of showers should remain on the low side during the day, but will persist as the WAA builds into the region.
143 PM EDT Thu Aug 24 2017 A weak cold front is expected to generate spotty showers today with below normal temperatures. The weekend weather will feature cool and dry conditions under the control of high pressure. High pressure building south from the Great Lakes will keep the fall like weather going.
1118 AM MDT Thu Aug 24 2017 An upper level ridge covers the western 2/3 of the CONUS, with the next wave to affect the region pushing into western WY. At the surface, a trough continues to stretch across eastern MT/WY. Winds are generally southeasterly around 10 kts, and temperatures are in the lower 60s. The upper ridge axis will shift over the central states today as the Canadian trough moves through the Pacific Northwest.
322 PM CDT Thu Aug 24 2017 A high pressure center over the Great Lakes and rising heights aloft will ensure quiet weather conditions for tonight and tomorrow. Condensation pressure deficit plots show increasing mid/high clouds streaming in from the west late tonight, which should keep overnight lows slightly warmer compared to last night. Winds will become easterly to southeasterly overnight around the southern edge of the Great Lakes high pressure center. The ECMWF suggests the upper low over the Great Lakes associated with precip earlier in the week, remaining in place due to stronger ridging over the ern U. Tilly VFR through the period due to the influence of a high pressure center over the Great Lakes.
330 PM CDT Thu Aug 24 2017 A very large area of high pressure will be situated east of the area tonight, sprawling from the Great Lakes Region southward to the Ohio Valley. 850mb temperatures are actually quite warm Friday afternoon, therefore trended toward the warmer bias corrected readings for highs.
Clouds should rapidly clear inland late Friday morning and along the coast early Friday afternoon with inland temperatures warming into the low 80s.
There remains a small stratus area along and north of a warm frontal boundary lying across northwest North Dakota. Potential for early morning low clouds/patchy fog in portions of western and central ND, and increasing chances for showers and thunderstorms late tonight are the highlights in the near/short term periods. Otherwise for the rest of the short term period, a mid/upper level transitory ridge will slide into western and central ND, resulting in plenty of sunshine, dry and warm weather.
346 PM EDT Thu Aug 24 2017 A cold front will move through tonight. High pressure will continue to build from the northwest through the weekend while the front lingers offshore.
259 PM CDT Thu Aug 24 2017 Pleasant weather for late August across the Midsouth with high pressure to our north keeping conditions dry and clear in the short term with temperatures in the low to mid 80's. A nearly identical day is expected tomorrow with high temperatures ranging from the low 80's in northern areas to the upper 80's in north MS.
1244 PM CDT Thu Aug 24 2017 At 2 AM, a short wave trough was moving southeast across Wisconsin and Lower Michigan. For tonight, a 700 mb trough will move slowly east into the area. In addition, the combination of mostly clear to partly cloudy skies, light winds, and dry dew points will allow temperatures to fall into the lower to mid 40s in central and north-central Wisconsin.
650 PM EDT Thu Aug 24 2017 A cold front will move through tonight. High pressure will continue to build from the northwest through the weekend while the front lingers offshore.
336 PM CDT Thu Aug 24 2017 Region of modest lower level theta-e advection, beneath slow moving low amplitude trof expected to yield scattered shower, and isolated storm, development overnight across western Oklahoma and adjacent parts of northern Texas.
355 PM EDT Thu Aug 24 2017 19z sfc analysis shows high pressure over the region. They all agree that the core of the eastern trough through the Great Lakes will shift east and away from the area tonight with heights rebounding and the mid level northwest flow relaxing.
The Pacific Northwest remains under a strong upper level ridge this morning. The axis of the ridge is still offshore. As such, the region remains largely under the subsident side of the ridge. The upper level flow is mainly northwesterly, while the lower level flow is light northwest to north. A weak upper low is off the northern California coast and has pulled some higher level moisture into southwest Oregon, but that moisture should remain mainly south of our area through tonight. Meanwhile the subsidence aloft associated with the upper ridge will cap the atmosphere between 10,000 and 13,000 feet.
113 PM EDT Sat Aug 5 2017 Cooler and less humid today under high pressure.
Models have varied on the track of the closed upper low, as is usual for this type of pattern, but is still fairly close to what they were showing yesterday. The upper level low now is shown to move inland farther north that was indicated yesterday, but will still have the same effect of pulling moist and unstable air into the region for as long as it keeps that general position. Sunday will see the usual Siskiyou county and up the Cascades pattern for thunderstorms, but with the flow from the northeast wrapping around the upper low thunderstorms should remain in southern portions of the east side.
The northwest flow from the persistent trough across Hudson Bay will begin to shift east Wed, with another boundary trying to slide south late Tue ngt/Wed and could bring a small chance for showers.
Showers and thunderstorms associated with the trough over Canada and the Upper mid West will remain east of the Divide this evening. Sunday, the low pressure disturbance near the California Coast begins to move inland and the moist and unstable air across Nevada and Utah begins to move north to Idaho.
in the upper 80s/low 90s apart from cooler temps in the higher terrain. Lows a bit cooler tonight, but as the southerly flow increases, expect warmer low temps by Sunday night. Regional radar shows scattered showers and isolated thunderstorms developing in the vicinity of the trough, well within the tropical-like airmass. The weak trough is expected to slowly sag south today.
After some morning low clouds and fog along with any residual showers from the above-mentioned complex, expect another round of showers and thunderstorms to develop over the higher terrain and track eastward through the afternoon and evening.
As we move into Sunday the activity will increase in coverage as the southerly flow increases behind the front that will act like more of a warm front as we push through the day.
Upper ridging remains to the west, but still captures west TX, into central TX, will help maintain frontal position.
As KDRT will be closest to the incoming trough the terminal could see more coverage of overnight showers so have carried VCSH for the first half of the night. A zonal flow aloft brings an upper level trough from the Big Bend today to over Central Texas on Sunday.
Convection over southern MO this afternoon is associated with a low- level warm front, located on the nose of a 30-35 kt LLJ. A weaker LLJ, around 20-25 kts, is forecast to nose into central KY/southern IN Sunday afternoon and evening as the sfc warm front lifts into the area. Some hi-res models continue to hint at isolated to widely scattered precip arriving in our counties west of I-65 as early as mid to late morning, but any lingering activity will be battling a substantial amount of dry air in the lowest 10 kft.
An ongoing thunderstorm complex along and just south of I-44 will continue to slowly move east southeast this afternoon as the low level jet continues to remain and veer slightly.
356 PM EDT Sat Aug 5 2017 Cooler and drier air is on store tonight and Sunday in the wake of a cold front that moved through the region.
302 PM EDT Sat Aug 5 2017 High pressure builds over the area through Sunday morning.
1233 PM CDT Sat Aug 5 2017 Southerly surface flow on the backside of the high pressure is beginning to surge northward into the area, increasing moisture and cloud cover across the region, as depicted in the IR satellite imagery at 07Z. Isolated showers and thunderstorms are quickly developing across south central South Dakota on the nose of the low- level jet, and WAA, along with the passage of the upper level jet north of the FA. Today will be a dreary and cooler day, with mostly cloudy skies.
253 PM CDT Sat Aug 5 2017 Currently, upper air analysis shows a broad, long wave trough over the eastern two thirds of North America. At the surface, low pressure exits over the southern plains, while high pressure sprawls across southern Canada. 850mb temperatures suggest another much below normal day on Sunday with highs in the lower to mid 70s. Models have almost uniformly trended south with the strongest forcing associated with a longwave trough progged to swing across the north central United States.
Weak upper low off northern California has spread clouds across southwestern Oregon which should reach southern Harney County late this afternoon.
Dry weather will remain across Central Indiana tonight as high pressure exits the area. Low Pressure over the Central Plains will push a warm front the Ohio valley On Sunday and Sunday Night.
Upper air analysis this morning showed the subtropical ridge pushing up into Texas from the southwest with west-northwesterly flow over us. With the ridge building up convection was being kept to our east. A weakness in the ridge will develop tomorrow and we expect an increase in rain chances for Sunday and Sunday night.
By late Sunday night expect convection to increase from the southwest and across coastal areas as a weak mid/upper level trough approaches.
This will result in cooler temperatures today, as well as very poor air quality due to wildfire smoke.
In the morning, high pressure is in control and after the fog burns off by about 14Z, should be a mostly sunny to partly cloudy sky. In the afternoon, a short wave trof is dropping south through Ontario, while another is moving through eastern South Dakota and southern Minnesota.
253 PM PDT Sat Aug 5 2017 Wildfire smoke from fires in British Columbia and Montana trapped under an area of high pressure will persist over Eastern Washington and North Idaho, otherwise dry conditions will linger through the weekend and through much of the upcoming workweek.
Weak cold front has moved into the Midlands at 17z. Overnight lows in the low to mid 70s. The weak front will return to the N/NE as a warm front ahead of another front approaching from the NW.
357 PM CDT Sat Aug 5 2017 Hudson Bay Low and associated trough into the central plains of Canada and the Great Lakes has a broad trough from the intermountain west into the eastern CONUS. There is some push back to this trough with the upper high centered over Florida. Sharp ridge continues along the west coast. With the upper trough overhead and numerous waves moving across western Nebraska thunderstorms have been initiating over and over today. Temperatures much cooler with the thick cloud cover on Sunday.
Can't rule out that as the low over southwestern KS undergoes further frontogenesis and southern moisture advection transport picks up into the evening, the warm boundary at the surface could make an advance into southern portions of the CWA.
Further west, cooler easterly winds and a good amount of stratocu has resulted in a capped airmass, and very little is going on to this point.
257 PM EDT Sat Aug 5 2017 A cold front will move across the region later this evening. Following the front will be high pressure building in from the west later tonight through Sunday night allowing drier weather and pleasant temperatures.
408 PM EDT Sat Aug 5 2017 High pressure will provide dry but cool weather through Sunday.
At this time, it appears that the highest potential for more widespread storms capable of producing heavy precipitation(including flash flooding potential at times) as well as more intense storms should occur from Sunday evening into at least mid-week.
A strong U/L ridge over the central Atlantic will extend across the Florida peninsula and Gulf of Mexico. At the surface, high pressure will persist east of the Bahamas with the ridge axis extending across the central Florida peninsula. The U/L ridge will produce large scale subsidence over the forecast area. while convection will also be suppressed in the vicinity of the ridge axis due to limited boundary interactions and overall weak L/L convergence.
303 PM EDT Sat Aug 5 2017 A weak cold front will slowly dissipate along the coast this weekend.
129 PM EDT Sat Aug 5 2017 Cooler and less humid today under high pressure.
/issued 306 AM CDT Sat Aug 5 2017/ High pressure remains entrenched across the Mid South this morning and will keep dry and seasonably cool temperatures in place today. A surface warm front will lift north in response to this upper system with much higher humidity levels building over the region. A few strong storms will be possible Sunday afternoon and evening across the region as deep layer shear along the southern periphery of the trough combines with increased surface instability.
336 PM EDT Sat Aug 5 2017 A cold front will move through the area tonight with shower and thunderstorms expected this evening.
Currently, a warm front extends from central Kansas through northwest Arkansas and into central Mississippi. Ahead of the warm front, a large area of thunderstorms is moving across southern Missouri this afternoon. The warm front is expected to lift north into the forecast area tonight. Temperatures will be remain a little cooler than normal with lows Sunday morning from the mid 60s to around 70 degrees. The warm front will lift north of the region on Sunday while a cold front starts to move south out of the central plains.
320 PM EDT Sat Aug 5 2017 High pressure will build east across the region through the weekend.
329 PM CDT Sat Aug 5 2017 (Tonight) A developing lee cyclone over the Oklahoma panhandle has pulled a warm front to the north, allowing for strong south westerly flow across the entire area.