Aikyam-Lab/Synoptic-Bench huggingface dataset:
312 PM EDT Sun Aug 6 2017 High pressure will slide off the Mid Atlantic coast late today. An area of low pressure over the Mid Mississippi Valley this afternoon will move east northeast to near Philadelphia by late Monday. This low pressure will bring a steady, chilly moderate rainfall to the region later tonight through much of Monday. High pressure will bring drier and more seasonably cool temperatures for mid week. Min temps will vary from the mid 50s NW to the low-mid 60s in the SE. Forecast storm total rainfall should stay well below even the lowest 6-hourly FFG values of 1.
Upper low centered over Interior NorCal this afternoon is triggering some storms over the Coastal range and mountains of Eastern Shasta/Western Plumas counties. Temperatures continue to run about to 2 to 7 degrees cooler most areas this afternoon under the influence of synoptic cooling.
342 PM EDT Sun Aug 6 2017 Atlantic high pressure will persist through Monday.
An upper level low off the northern California coast will wobble around for the next few days, teasing the Oregon Cascades with the chance of thunderstorms for most of the week.
However, the tail end of the MCS has virtually stalled along the attendant outflow bndry near/just S of the Red River in N TX over Grayson, Fannin, and Lamar Counties, with backbuilding ongoing ahead of the mid/upper level trough axis depicted on the GOES-R imagery over Cntrl OK/extreme N TX.
High pressure centered over the western Great Basin will slowly break down through Monday with increased thunderstorm activity expected across northern and central Utah.
313 PM EDT Sun Aug 6 2017 High pressure will build into the region through Monday.
300 PM CDT Sun Aug 6 2017 At H5 strong closed low over the Aleutians. sharp ridge all the way into the Yukon. Quasi blocking pattern developing over the west coast. Quasi blocking pattern to the south of Greenland. These features are allowing a broad trough across the Northern CONUS. The current upper air pattern will hold through the end of the work week till it begins to transition as the upper ridge to the west begins to shift east. As a storm moves across the southern Gulf through the week upper high over northern Mexico will build and move north into the Desert Southwest allowing waves to move out of the base of the trough along the west coast and move over the central Rockies into Western Kansas.
A cold front across northern Oklahoma will continue to move southward through the day as a mid level trough moves east of Oklahoma. A mean ridge will be positioned southwest of us and west-northwesterly flow aloft will continue with small perturbations moving through bringing daily chances of thunderstorms.
640 PM EDT Sun Aug 6 2017 High pressure will build into the region through Monday.
In general, a broad mid level trough will continue to influence the Gulf Coast states during the week, but upper level ridging will also increase across the northern Gulf of Mexico during the period.
314 PM CDT Sun Aug 6 2017 Another round of showers and thundershowers have kicked off this afternoon mainly north and south of the Highway 12 corridor. The remainder of this forecast period will feature more quiet weather as high pressure gradually takes hold of the pattern.
252 PM CDT Sun Aug 6 2017 Following along with the earlier update and mesoscale discussion, differential heating and sharpening ageostrophic flow of winds near the warm front, ahead of the approaching MCV in northeast AR, just west of the Missouri Bootheel, is leading to increased instability. Rain-cooled air along the elevated warm front over southern Illinois, southwest Indiana, and northwest Kentucky will continue to work east-northeast for the remainder of the afternoon.
247 PM EDT Sun Aug 6 2017 A mean layered ridge centered just southwest of Bermuda stretches west into the Gulf of Mexico.
135 PM EDT Sun Aug 6 2017 An area of low pressure will track northeast across the Ohio Valley Monday.
Lingering low level convergence along with the approach and passage of mid level trough axis, will keep at least a small chance of showers going, mainly for the morning hours. Northeast winds will bring a cooler airmass into the area.
Scattered showers and thunderstorms expected over the coming days which will also help bring slightly cooler temps.
18Z TAFs A warm front has lifted to the North of all TAF sites resulting in Southerly wind, generally 5-10kt.
The forecast for this afternoon looks on track, with the cold front backing across the Plains this morning building moisture along and east of the Eastern Mountains, into the I-25 corridor. Mozley Surface cold front dropping southward through the plains early this morning, with boundary forecast to reach the NM border by late afternoon. Clouds/cold front/precip will bring cooler maxes to the astern mountains and plains today, while interior valleys and western mountains see little change.
A broken band of convection was along the 850 mb warm front over sw parts of IL/KY south of I-64 and lifting ne. Monday looks a bit warmer in the forecast without the showers and thunderstorms, but the guidance is slow to clear the clouds out and the winds have a north/northeasterly component. but ridging over the west coast of the country keeps weak northwesterly flow over the Plains and the Rockies. Latest forecast models take weak low pressure ENE along the central KY/TN border by midday Monday.
327 PM CDT Sun Aug 6 2017 The leading edge of the northerly winds and cooler air has come in a bit ahead of schedule, visiting all but the southern Rolling Plains as of 1940Z. Otherwise, we may see additional scattered elevated showers and storms attempt to develop over the cooler airmass tonight, though coverage will likely be less than what was anticipated earlier. Lastly, storms originating over the higher terrain of New Mexico this afternoon will propagate east- southeastward and will have a good chance of affecting spots out near the TX/NM line.
1115 AM PDT Sun Aug 6 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 much of the upcoming week. With the 500mb ridge axis along the coast, our prevailing low and mid-level wind direction will remain out of the north or northwest for the next couple of days. Isolated afternoon and evening showers and thunderstorms remain in the forecast today for the high terrain of the Cascades in far north central Washington. The NAM and GFS continue to forecast surface based instability north and west of Twisp over the high mountain ridges. Our prevailing low and mid-level wind will be out of the north or northwest under a broad high pressure ridge.
338 PM EDT Sun Aug 6 2017 Low pressure system crosses late tonight and Monday.
1113 AM MDT Sun Aug 6 2017 Current surface analysis shows low pressure over central KS, with frontal boundary south and west of the region.
335 PM EDT Sun Aug 6 2017 Low pressure system crosses late tonight and Monday.
250 PM MDT Sun Aug 6 2017 Weak high pressure will keep the region mostly clear into Monday, as temperatures warm closer to normal.
350 PM CDT Sun Aug 6 2017 Tonight: All will be quiet as weak high pressure that is centered over the U. Tue-Wed Night: Rain & thunderstorms will gradually increase for as the previously mentioned lower-deck high pressure continues its slow eastward trek, the moisture axis would likewise shift further east (albeit slowly). A prolonged wet period is anticipated as a weak warm front develops in an E/W manner through KS.
220 PM CDT Sun Aug 6 2017 The low pressure system that created flash flooding issues last night will move off to the SE leaving a light NE wind and widespread low cloud deck overhead today. This cloud cover will help to keep temperatures even more unseasonably cool today with highs in the low to mid 70s expected. Surface ridging will build in from the north with consistent NE winds keeping the area nice and cool for early August the next few days.
Broad upper level trough over the upper Midwest and Northeastern States with ridge well off the Carolina coast. Strong short wave trough over the Plains will move east toward the region tonight. Max temperatures this afternoon in the low 90s outside rain areas.
139 PM EDT Sun Aug 6 2017 Precipitation chances will increase through today into Monday as a low pressure system moves east across the region. This will also likely help keep temperatures down somewhat with highs ranging from the lower 70s across the northwest to the mid to upper 70s in the southeast. For tonight, the low will lift east/northeast through the mid Ohio valley with a warm frontal boundary lifting as far north as midway through the forecast area, and is expected to become the focus of ample rainfall. Potent low pressure carried by a westerly flow aloft will be moving across Ohio on Monday. Rain chances diminish by Monday afternoon as the low tracks rather quickly east toward the Atlantic Coast.
A strong and elongated cell of high pressure stretching from the Gulf to the western Atlantic will provide subsidence, and very warm conditions at the surface. Maximum temperatures will generally top out in the low to mid 90s, a few degrees higher than seasonal norms. Minimum temperatures will only dip into the low 80s, once again tying or potentially breaking high minimum temperatures records.
Weak s/w trough near KCOT may allow for an iso SHRA to occur vcnty KCOT.
Feel the fair amount of cloud cover across the area this morning will prevail into afternoon and keep temperatures slightly cooler than what was forecasted so nudged down forecast highs by a couple degrees. Northwest flow aloft dominates the period with one short wave trough and their associated surface cool front after another dropping out of Canada and across our region.
A weak cold front will be moving south across the area tomorrow bringing widespread showers across the KABI, KSJT and KBBD terminals. A weak cold front will push into West Central Texas, from the north, this evening. As a weak cold front approaches our northern counties today, showers and thunderstorms may develop across mainly our northern Big Country counties.
This activity is associated with a band of weak isentropic ascent along and north of a pseudo-warm front stretched across northern sections of Middle Tennessee. The remainder of the mid-state is void of rain, but that will change by early this afternoon as a true warm front lifts northward out of northern Mississippi and Alabama and settles across far southern Kentucky. As this warm front lifts northward, expect it to feel more like summer again with temperatures climbing into the mid to upper 80s and dew points surging into the upper 60s to lower 70s. Although not reflected in this set of TAFs, winds will begin to veer to the W/NW with a cold frontal passage after 15Z at CKV, BNA, and MQY.
Then, low pressure passes by to the south of the region overnight tonight allowing today's rain to come to an end.
224 PM EDT Sun Aug 6 2017 A quasi-stationary cold front across southern NC will return north was a warm front this afternoon.
642 PM EDT Sun Aug 6 2017 Crossing low pressure will return rain to the region tonight and Monday.
410 PM CDT Sun Aug 6 2017 Post cold front across the Panhandles today is overcast skies with an isolated chance of a shower or storm in the far western Panhandles as convection develops in the high terrain to the west in NM. Perturbations circulating the 594 dam high pressure system centered near the NM/AZ stateline as indicated by the 06/12Z global model data, will bring chances of showers and storms to the region everyday throughout the week.
244 PM EDT Sun Aug 6 2017 Crossing low pressure will return rain to the region tonight and Monday.
334 PM EDT Sun Aug 6 2017 High pressure slowly shifts to our south and east tonight into Monday.
130 PM PDT Sun Aug 6 2017 A weak trough off the California Coast will give way to building high pressure over northwest Mexico this week.
314 PM MDT Sun Aug 6 2017 Upper level analysis has broad trof across the northern CONUS with weak cyclonic flow across the northern Plains. At the surface, weak high pressure was located across the area, with temperatures in the upper 60s to mid 70s.
559 PM EDT Sun Aug 6 2017 High pressure will slide off the Mid Atlantic coast late today. An area of low pressure over the Mid Mississippi Valley this afternoon will move east northeast to near Philadelphia by late Monday. This low pressure will bring a steady, chilly moderate rainfall to the region later tonight through much of Monday. High pressure will bring drier and more seasonably cool temperatures for mid week. Min temps will vary from the mid 50s NW to the low-mid 60s in the SE. Forecast storm total rainfall should stay well below even the lowest 6-hourly FFG values of 1.
334 PM EDT Sun Aug 6 2017 High pressure building into the region will provide mainly dry but breezy conditions to the area today, along with temperatures well below early August standards.
A weak mid level s/w trough is currently shifting east across the northern CWA this afternoon.
1235 PM CDT Sun Aug 6 2017 Immediate issue is low clouds that continue to push southward behind a southward-moving cold front. Afternoon chances should be along the cold front which will be south of the terminals. The overall trend of troughing across the NERN CONUS and a dome of high pressure over NWRN MX/SWRN CONUS will continue.
Conditions are prime for freezing rain if that occurs and it's possible this afternoon and maybe this evening. TFJ Upper trof beginning to move over the west coast this morning, with this system expected to bring colder temperatures and snow to the region as it re-digs the trof over the eastern states. Push of warmer air ahead of the system also keeping temperatures from falling too much.
139 PM PST Tue Jan 9 2018 Low pressure over southern California is tracking east. This low may produce light rain or snow for areas south of Highway 50 tonight. Another weak area of low pressure moves into the Great basin from the northwest tonight and brings showers.
1258 PM EST Tue Jan 9 2018 High pressure will build over the region Today, shifting off the East Coast on Wednesday.
With the assistance radar imagery, it looks like the light freezing rain/sleet/snow ended over our northeastern counties around 08Z. Dry weather should now remain through tonight as zonal flow at 500mb turns southwesterly by mid afternoon in response to the 500mb low shifting across southern CA, allowing the weak ridge axis to move across MN and WI.
149 PM EST Tue Jan 9 2018 The region will be between high pressure to the North/Northeast and a weakening area of low pressure over the Gulf. In addition an upper trough will pivot East across the region, which coupled with the moist onshore flow will help provide support for showers. Temperatures will struggle near the coast on Wednesday though, as the onshore flow passes over the cooler coastal waters.
243 PM CST Tue Jan 9 2018 (Tonight and Wednesday) An upper level trough across the Desert Southwest will slowly track east toward West Central Texas tonight into Wednesday. Low temperatures will generally be in the low to mid 40s.
331 PM CST Tue Jan 9 2018 High pressure ridge sliding to the east today, and mostly zonal flow aloft with warmer temperatures advecting into the region continues the influence of a strong temperature inversion trapping a moisture rich airmass in place. Pattern shift as the low over the desert SW deepens and the flow across the CONUS amplifies.
405 PM EST Tue Jan 9 2018 A warm front may bring light precipitation Wednesday morning.
The low clouds and high boundary layer moisture should keep minimum temperatures about 10 to 15 degrees above normal. Southeast winds increase late tonight and tomorrow as high pressure moves to the east and the pressure gradient increases ahead of a trough to our west.
A chilly morning with this lingering cloud deck but expecting a quick warm up into the lower 60s once clouds clear early this afternoon. Overcast and return flow has Wednesday's minT forecast on the cooler albeit milder side.
Sub-freezing temps further complicated things with some black ice accretion in the dense fog. Fortunately, it appears surface temps will be above freezing with the steady SE wind. Also, with temperatures near freezing this morning, there could be some slick spots on area roads. Expect lows to stay above freezing tonight, and there may be some patchy drizzle with the increase in low level moisture.
A strong low pressure system near southern California this morning will move east across northern Arizona by Wednesday afternoon. Expect much cooler temperatures Wednesday.
1015 AM PST Tue Jan 9 2018 Widespread precipitation will taper off to showers today as the low pressure system moves into SoCal. Accumulating snow will be limited to the just the highest elevations.
Rain will increase this afternoon as a cold front comes in from the west.
316 PM CST Tue Jan 9 2018 18Z surface data has high pressure over the Ohio Valley with a developing storm system in the Rockies. Tonight, the low will likely occur between 7 and 9 PM. There may or may not be some patchy freezing drizzle north of highway 30. The first, the above freezing temps with rain the second post cold front environment with cold temperatures and chances for clippers through the period.
Areas of dense fog and freezing fog will impact much of the Missouri Ozarks through early this morning before gradually lifting by late morning. With temperatures hovering near freezing the potential for black ice will persist through sunrise. Could also see patchy drizzle develop tonight but temperatures will remain above freezing. Southerly winds will continue to increase into Wednesday in advance of a pronounced upper level trough coming across the Rockies.
1153 AM CST Tue Jan 9 2018 High pressure ridge is sliding to the east this morning, and weak southerly flow is expected to continue through the afternoon. Adjusted the highs to account for cloudy skies. Forecast soundings show the moisture concentrated in about the lowest 4,000 feet of the atmosphere, so this should largely be in the form of drizzle. Temperatures are expected to remain above freezing tonight, so icing is not anticipated at this time. Prominent upper low west of California this morning will be located in Kansas by Wednesday evening.
A weak warm front will reach the area Wednesday afternoon.
Issued by National Weather Service GREENVILLE-SPARTANBURG SC 1239 PM EST Tue Jan 9 2018 There will be increased moisture and a moderation in temperature associated with an onshore flow between the ridge shifting off the East Coast and low pressure moving from the Lower Mississippi River Valley into the northeast Gulf of Mexico today.
Over the next 48 hours, the cyclonic circulation over the Gulf appears to decouple as the supporting upper trough slides eastward, leaving any remnant low in the lower troposphere to sink southward and fill. During that time, the approach of the upper trough axis and cyclonic flow beneath will allow for some rain to work back from the Straits over the Keys, but QPF is expected to remain rather light.
1139 AM CST Tue Jan 9 2018 Main concern out of the gate this morning continues to involve fog and freezing fog for areas primarily east of Route 65.
336 PM CST Tue Jan 9 2018 A strong upper low will track east across the Four Corners region and the southern Rockies Wednesday.
1058 AM CST Tue Jan 9 2018 High pressure ridge is sliding to the east this morning, and weak southerly flow is expected to continue through the afternoon. Adjusted the highs to account for cloudy skies. Forecast soundings show the moisture concentrated in about the lowest 4,000 feet of the atmosphere, so this should largely be in the form of drizzle. Temperatures are expected to remain above freezing tonight, so icing is not anticipated at this time. Prominent upper low west of California this morning will be located in Kansas by Wednesday evening.
327 PM EST Tue Jan 9 2018 A warm front may bring light precipitation Wednesday morning.
443 PM EST Tue Jan 9 2018 Latest water vapor loop depicts a closed low spinning counter clockwise in the easter Gulf of Mexico with a plume of moisture thrust northeastward, ahead of the feature. By Wednesday morning, models push the aforementioned low pressure system southeastward, towards the Florida Keys. Out ahead of the low, winds will remain light and easterly, continuing to advect low level moisture into South Florida. Maximum temperatures on Wednesday are forecast in the upper 70s, a few degrees warmer than seasonal norms.
240 PM CST Tue Jan 9 2018 The pleasantly, mild temperatures over the region today under a transient upper ridge will be switch to windy, but still mild, conditions Wednesday as a compact upper low coming ashore over SoCal this afternoon opens tonight, then ejects east, northeastward over the Texas Panhandle. It will still be windy tomorrow, but the uncertainty created by these above mentioned differences will prompt the continuation of the High Wind Watches, and Fire Weather Watches over southeastern New Mexico and West Texas for Wednesday and Wednesday night. Light rain could also occur, but it appears Southeast New Mexico will see the best chance of measurable rain due to their proximity to the ua trough.
1017 AM MST Tue Jan 9 2018 As the low pressure area moving through the southwest U.
229 PM CST Tue Jan 9 2018 Despite upper ridge ovhd, relatively warm and moist air continues to overrun cold air at the sfc, resulting in thick cloud layer across much of the Lower MS River Valley today. Swly flow aloft fcst to increase, as upper low over srn CA continues to push ewd. Timing of the approaching upper low/cold front slightly slower than previous runs. Main line of convection should exit the region by late Thu night, but several model solutions indicate some lingering moisture wrapping around the n and nw side of the now closed upper low. The GFS continues to be the outlier on this facet, as it does not close off the trof. There does seem to be some evidence that some snow flurries will be possible, especially in the vc of the upper low.
Medium The ridge of high pressure will continue to retreat from the western Great Lakes this period.
/Issued 513 AM CST Tue Jan 9 2018/ Near-record and record high temperatures expected today as southwest winds associated with lee trof boosts maxima some 25 to 30 degrees Fahrenheit above normal. This will drive a Pacific cold front across the area Wednesday, followed by a strong Polar cold front Wednesday night.
323 PM EST Tue Jan 9 2018 WV imagery and RAP analysis indicated a mid/upper level low moving into CA and a broad downstream ridge over the cntrl CONUS. At the surface, a ridge extended from ne MN and WI resulting in nw flow through the ern Lake Superior. The clouds and WAA/mixing will keep min temps in the low to mid 20s. Upper air pattern consists of a 500 mb trough over the central U. This trough moves slowly east and affects the area Thu into Thu night. In the extended, GFS and ECMWF show a 500 mb trough with cold air over the central and eastern U.
As of 2PM this afternoon, GOES-E visible imagery showed some high cirrus moving in from the west, winds were beginning to increase into the 10-15 mph range on the Plateau and Rio Grande Plains due to a enhanced surface pressure gradient from troughing in the Texas Panhandle, and highs were ranging from the mid 60s to low 70s. At the H5 level, a ridge axis was situated over the region which will slowly shift eastward over the next 36 hours.
1208 PM EST Tue Jan 9 2018 A fast zonal flow aloft and high pressure building into the region this afternoon and tonight will lead to only a brief period of quiet weather into the first part of Wednesday. Moist southerly flow will ride up and over the retreating colder air on Wednesday bringing a chance of some light rain or freezing rain across mainly the Northern Mountains of the state.
245 PM EST Tue Jan 9 2018 High pressure moving over the area will bring seasonably cool conditions tonight through Wednesday.