Aikyam-Lab/Synoptic-Bench huggingface dataset:
Some smoke could move into the lower levels but should not pose an issue to flight rules. /issued 315 AM CDT Fri Sep 18 2020/ The upper ridge currently stretching from the Four Corners region northward will get kicked eastward by the upper low currently off the Pacific Northwest coast. Despite the upper ridge moving over the FA high temps will not be all that different from yesterday as thicknesses stay quasi-steady. Winds will also stay relatively light and mostly out of the east to northeast as surface ridging stretches from the Great Lakes southwestward. Overnight will remain quiet as well as the upper high sits overhead with continued surface ridging. The lack of any significant weather will be due to steady ridging overhead.
843 AM CDT Fri Sep 18 2020 A cold front has slipped south of the TN valley this morning. There is an inverted low- level trough that will be present across the area tonight. Temperatures will drop due to this low-level cool air advection. However, the inverted low-level trough across the area will lead to increased moisture in this layer. High temperatures are on the cool side on Saturday ranging from the low to mid 70s.
/issued 537 AM CDT Fri Sep 18 2020/ SHORT TERM (Now through Saturday): Numerous showers/thunderstorms are anticipated for today as deep tropical moisture once again interacts with a positively-tilted 500 mb trough over the Lone Star State. Fortunately, and finally, the eastward shift of this mid-level feature, and 500 mb high pressure building in its wake, will lead to drier conditions tonight and especially on Saturday.
Issued by National Weather Service Jacksonville FL 1027 AM EDT Fri Sep 18 2020 Sfc analysis shows high pressure over far srn FL with light southerly flow over the forecast region. Water vapor and IR imagery show mainly scattered low cumulus clouds streaming northward while thin high clouds continue to come in out of the east due to mid level high pressure centered just off the southeast FL coast.
324 AM MDT Fri Sep 18 2020 H5 ridge continues to get pushed over by the large trough off the Pacific Coast during the next 36 hours. The western trough will quickly eject across the northern Rockies tonight into Saturday morning. An associated cold front will progress west to east across the state. The models continue to show good agreement for the placement of the trough over western Wyoming Saturday night.
523 AM EDT Fri Sep 18 2020 Under mostly clear skies and light winds, temperatures range from the mid to upper 70s in a few interior large islands, to the lower 80s elsewhere, Meanwhile, local radars are only detecting a few showers in our region. A developing tropical disturbance in the western Gulf of Mexico associated with a trough reaching across the northern coast of the Gulf of Mexico, northeastward to the remnants of tropical system Sally offshore of the mid Atlantic coast, will drop southward into the northern portion of the Florida Peninsula by late Saturday.
By this evening, showers from a Pacific trough will develop across central Idaho and eventual move north and east. On Saturday, as the trough moves through our area, all locations are expected to receive rain.
This afternoon/evening should be similar to yesterday with an upper level trough remaining in the area and PWATs above 2 inches. Drier air will move in later tonight as the trough drifts away from the area giving us a brief respite from the rain.
A cold front has slipped south of the TN valley this morning. There is an inverted low- level trough that will be present across the area tonight. Temperatures will drop due to this low-level cool air advection. However, the inverted low-level trough across the area will lead to increased moisture in this layer. High temperatures are on the cool side on Saturday ranging from the low to mid 70s.
The sheared trough axis at 5h will remain in central GA through southern MS, while a couple of northwest flow waves drop southeast from the upper Midwest into the Ohio Valley regions late tonight. An inverted trough at 8h and the surface over GA and southeast AL will shift northwest across AL into southern middle TN. On Saturday, the inverted trough will shift west into MS during the afternoon hours, allowing moister east-southeast flow to produce additional clouds through the day.
Looking at the broader scale, we are seeing an upper trough move into the Pacific NW, and the ridge that had been impacting that area will translate eastward over the central Plains.
140 PM EDT Fri Sep 18 2020 Overnight, with high pressure building in from the northwest and a dry airmass throughout the column, we've observed clear skies and temperatures across the region drop into the 20s inland and the 30s by the lakeshores. Some of the warmer spots have been Copper Harbor, Big Bay and Marquette, which so far have only fallen into the lower 40s. With 850mb temps hovering around -2C today, expecting highs to top out in the low-mid 50s.
150 PM EDT Fri Sep 18 2020 The remnants of Sally has pulled a bit of cooler drier air into Georgia and extreme north Florida. What is more important to our weather is that Sally will also bring cooler Canadian air southward to dam up east of the Appalachians.
257 PM CDT Fri Sep 18 2020 High pressure is building into the region as the 500 mb pattern shifts to more northwesterly flow in the eastern half of the CONUS. Overnight lows will drop into the lower 60s and upper 50s with the drier air in place over the southeast. in the lower 80s and upper 70s.
1230 PM CDT Fri Sep 18 2020 Expect cool and dry weather in central Illinois the next few days as high pressure dominates the weather pattern over the region.
/issued 315 AM CDT Fri Sep 18 2020/ The upper ridge currently stretching from the Four Corners region northward will get kicked eastward by the upper low currently off the Pacific Northwest coast. Despite the upper ridge moving over the FA high temps will not be all that different from yesterday as thicknesses stay quasi-steady. Winds will also stay relatively light and mostly out of the east to northeast as surface ridging stretches from the Great Lakes southwestward. Overnight will remain quiet as well as the upper high sits overhead with continued surface ridging. The lack of any significant weather will be due to steady ridging overhead.
240 PM CDT Fri Sep 18 2020 Quiet, dry and rather pleasant weather will continue tonight and Saturday as we remain under the influence of ridging aloft and at the surface. Smoke from the western wildfires, making the long track around the upper ridge, will linger over the region and create hazy conditions. Lows tonight will dip down into the 40s and 50s, with highs on Saturday in the lower to middle 80s.
High pressure will be on its way out starting Friday night through Saturday as the upper level ridge traverses over the Great Lakes region.
Slow cooling will begin to spread inland as a trough dances inland to our north this weekend.
Gusty NE winds will continue until early evening as a result of a tight pressure gradient between the aforementioned high and low pressure off the East Coast. Expect clear skies overnight with lows dropping into the mid 40s for most, which is quite a departure from seasonal norms but several degrees warmer than record lows at our climate sites.
1239 PM CDT Fri Sep 18 2020 (Today and tonight) Light winds and seasonal temperatures are expected today and tonight, as a ridge aloft and weak surface features dominate Oklahoma/north Texas weather.
High pressure is building into the region this morning. Forecast is on track to bring the temperatures in the low to mid 80s later this afternoon. Prior discussion below: Today and Tonight: Continued dry with cooler temperatures through the period. Early morning surface analysis had a weak cold front just south of our CWA while a second dry reinforcing cold front was noted nearing our northwest most zones. This reinforcing cold front will move through our CWA today and bring a surge of cooler and even drier air that will help keep afternoon highs in the 80s. Under mostly clear skies and a light wind tonight, strong radiational cooling will allow morning lows to drop into the upper 50s along the Highway 82 corridor and in the low to mid 60s elsewhere.
1221 PM CDT Fri Sep 18 2020 With cooler dry air filtering into the behind the cold front that has pushed through. The front is currently over southern Arkansas and will continue to sink southward and dissipate as upper ridging anchored over the southwest conus contracts a bit, and troughing digs down into the mid south. High pressure will build in at the surface.
310 PM CDT Fri Sep 18 2020 Expect cool and dry weather in central Illinois over the weekend as high pressure dominates the weather pattern over the region.
Light winds from the east today, but they will become more southerly overnight as an area of high pressure moves off to the east into the Great Lakes region. With mostly clear skies anticipated, the typically cooler locations across northern Wisconsin and parts of west central Wisconsin will see temperatures dip into the lower 30s. Slightly windier conditions are expected by the afternoon, with the highest gusts around 20 knots being more likely west of the Mississippi River. The forecast area begins the timeframe between high pressure centered over New England and low pressure moving through Canada.
307 PM CDT Fri Sep 18 2020 In the overall pattern, a trough is making its way onshore along the West Coast while a ridge sits over the Rockies and another trough stretches from Hudson Bay through the East Coast.
1210 PM CDT Fri Sep 18 2020 Mild, dry, and sunny conditions are expected throughout the region Friday, thanks to an expansive area of high pressure across the Great Lakes and upper Mississippi Valley. This area of high pressure will maintain very stable atmospheric conditions that will eliminate the possibility for precipitation, and even most cloud cover. Meanwhile, a combination of persistent northeasterly winds and anomalously low temperatures in the lower levels of the atmosphere, generally 850 mb and lower, will result in a very mild afternoon and downright cool overnight lows.
Cooler temperatures are expected tonight with lows in the upper 40s to mid 50s. Saturday will be slightly warmer than today, with highs in the 70s to mid 80s. As the surface pressure gradient tightens due to high pressure sliding to the east and an approaching surface boundary, winds will remain strong through the day on Saturday.
326 PM CDT Fri Sep 18 2020 (Issued 330 PM CDT Fri Sep 18 2020) Tonight through Saturday night: A fairly quiet period expected with tonight expected to be cool with a chance for some patchy to scattered frost across primarily the northern and central portions of the CWA as high pressure overhead starts to push east. The low lying areas will be more prone to frost but for the most part models suggest southern Wisconsin should remain warm enough to avoid Frost Advisory conditions. Into tomorrow the high will strengthen keeping higher pressure in the region keeping High pressure in the region through Saturday night. Otherwise, tomorrow will be a slightly warmer day with highs in the low to mid 60s with the high to the west bringing south to southeast winds back to the region.
133 PM MDT Fri Sep 18 2020 Upper ridge axis is moving over the Rockies, while a low pressure system pushes into the Pacific NW. Surface map shows southeasterly winds 5-15 mph between high pressure to the east and an approaching trough. As the Pac NW trough approaches the northern plains tonight into Saturday, there may be some improvement in upper-level smoke/haze.
221 PM CDT Fri Sep 18 2020 Quiet, dry and rather pleasant weather will continue tonight and Saturday as we remain under the influence of ridging aloft and at the surface. Smoke from the western wildfires, making the long track around the upper ridge, will linger over the region and create hazy conditions. Lows tonight will dip down into the 40s and 50s, with highs on Saturday in the lower to middle 80s.
357 PM EDT Fri Sep 18 2020 A quiet afternoon across the Florida Keys with light southwesterly breezes, mostly sunny skies, and highs in the lower 90s. The Cuban shadow has squelched any precipitation chances, with complementary help from the anticylonic flow in the lower levels.
939 AM MDT Fri Sep 18 2020 Satellite imagery shows strong ridge axis over central MT with a deep low along the Pacific coast. As the ridge axis moves slowly east, we will begin to see an increase in high clouds from the west today and tonight.
335 PM CDT Fri Sep 18 2020 We had a quiet day today as cool high pressure continued to drift east through the Great Lakes region leaving us with southerly winds. Northwest flow aloft will give way to an upper ridge tomorrow.
SE winds should become more widespread by noon as a warm front moves north. TFJ Upper ridge will remain in place across Montana today with warm and dry weather. As the ridge axis moves east tonight and Saturday into the Dakotas will see some increasing smoke from western wildfires into the forecast areas. A Pacific trough will move inland across the Pacific NW today and into Montana on Saturday. This will bring a cold front across the region Saturday evening and night with showers and thunderstorms.
/Today/ Nely winds continue across the region in the wake of a late summer cold front.
Expect lows to fall into the low to mid 50s areawide, with a few low lying areas briefly touching the 40s by tomorrow morning.
Weak mid level ridging over the SW U. Subsidence associated with this ridge will keep precipitation chances negligible for the next several days. More or less, models show an upper trough developing over the Southern Plains which would eject the tropical cyclone from the Gulf and into the SE U. The strength of this trough will directly affect whether we see cooler temperatures and some rain or more dry conditions.
301 PM EDT Fri Sep 18 2020 A period of cooler temperatures is expected tonight and Saturday with the possibility of frost forming by early Saturday.
230 PM MDT Fri Sep 18 2020 Satellite imagery shows upper ridge axis over central MT with an upstream deep low along the Pacific coast. E/SE surface winds and the persistent smoke cover aloft are helping to keep temps suppressed, but current values are a bit warmer than yesterday. Ridging aloft will keep conditions dry along with the increase in cloud cover tonight. This will be followed by a late day cold front and shift to W-NW winds. Showers will taper off late Saturday as the low lifts north and is replaced by large scale subsidence.
The upper level trough moves little, positioned from the Ohio Valley into the western Gulf through the near term. Ahead of the trough, a southwesterly flow aloft transports mid and upper-level moisture over our area from Tropical Depression Twenty-Two over the southwestern Gulf, with low-level moisture increasing after midnight through Saturday. With low-level moisture on the increase and enhanced lifting along the upper trough late tonight through Saturday, precipitation forming in the mid-levels will eventually make it to the surface.
(This evening through Saturday) Tranquil weather will continue across West Central Texas through Saturday, with high pressure dominating. Lows tonight will be in the upper 50s and lower 60s, with highs tomorrow in the low to mid 80s.
222 PM CDT Fri Sep 18 2020 Upper level and surface ridging are strengthening across the area today which will ensure a dry and pleasant early Fall like weekend across eastern Oklahoma and western Arkansas.
High pressure across the intermountain west will continue its slow progression eastward over the next couple of days.
Considerable mid and high clouds are streaming over the region, helping to inhibit heating some, but still expect temperatures will reach the lower to mid 80s acrs the area during the aftn.
/issued 959 AM CDT Fri Sep 18 2020/ Dry air continues to filter into the Mid-South behind a weak cold front this morning. /issued 340 AM CDT Fri Sep 18 2020/ Cooler and drier air is filtering into the region behind a weakening cold front. A few upper 40s are possible in the cooler spots tonight and Saturday night. The GFS and Canadian keep the system in the Gulf while the ECMWF moves it into the Lower MS Valley which would bring some rainfall to at least parts of the area.
An upper-level trough will influence one more day of near to below average temperatures across the area today, with highs in the mid 60s to low 70s. Smoke aloft should persist Saturday, as a high-amplitude upper-level ridge shifts east across the Northern Plains. Southeasterly breezes will again be on the increase, perhaps gusting to around 30 mph (above most guidance) as incoming low pressure tightens the pressure gradient. High temperatures Saturday will be a good 10 degrees warmer than Friday across the board.
Tonight will feature dry conditions as high pressure moves across the Great Lakes with increasing pressure. If clouds can scatter out further, then cooler lows are possible.
Changes are on the way this weekend with high forecast confidence in cooler temperatures, far less wildfire smoke in the air, and widespread rainfall.
Water vapor imagery shows an amplified upper trough moving through the Pacific Northwest and a warm upper ridge over the southwestern US. Farther east, a broad trough of low pressure is noted over the Northeast, and a tropical system (expected to strengthen into a hurricane in coming days) is sitting over the western Gulf of Mexico. Temperatures should cool into the low 50s across eastern Kansas and into the mid 50s west where south winds will maintain a slight breeze. The surface pressure gradient will tighten across the area tomorrow as the Pacific Northwest trough pushes east into the Intermountain West. That will result in an increase in southerly winds to between 10 and 15 kts, and slightly warmer temperatures - about 5 degrees warmer than today.
1031 AM CDT Fri Sep 18 2020 Expect cool and dry weather in central Illinois the next few days as high pressure dominates the weather pattern over the region.
222 PM CDT Fri Sep 18 2020 Sunny and dry weather has persisted across extreme southeast Kansas and the Missouri Ozarks so far today, with temperatures currently sitting in the low to mid 70s area-wide early this afternoon. High pressure centered over Wisconsin will keep a dry airmass in place over the Ozarks region for the remainder of today and tomorrow as it moves slowly east over the Great Lakes.
/Tonight through Saturday Night/ Our region remains under weak nly flow aloft, as the upper ridge remains anchored over the Desert Southwest and an upper trof axis lingers over the ern CONUS. High pressure continues to build in at the sfc in the wake of a cold front. Dense CI associated with TD 22 in the western Gulf of Mexico may act to keep temps a bit cooler Saturday, so we may see these trend downward over the next couple of fcst packages.
Upper level trough off the Oregon coast is interacting with moisture over central CA and NV as it moves inland today. Expect the highest precipitation amounts to fall over the central Idaho mountains into Saturday. A cold front will move from west to east through the area this evening.
211 PM CDT Fri Sep 18 2020 An upper-level ridge will build into the area this weekend. The weekend will see our driest air in months as dew points drop to the low to mid 40s. Low temperatures tonight and tomorrow night will be down into the 40s with highs tomorrow mainly in the lower 70s.
Given the negative tilt to the trough, a few storms could produce gusts approaching severe limits, but widespread severe storms are not expected at this time.
123 PM PDT Fri Sep 18 2020 After yet another warm day today, slow cooling will begin to spread into the region as a trough dances inland to our north this weekend.
242 PM CDT Fri Sep 18 2020 Quiet, dry and rather pleasant weather will continue tonight and Saturday as we remain under the influence of ridging aloft and at the surface. Smoke from the western wildfires, making the long track around the upper ridge, will linger over the region and create hazy conditions. Lows tonight will dip down into the 40s and 50s, with highs on Saturday in the lower to middle 80s.
GA will remain in a general northwest flow through the short term with ridging west of the MS and a trough over the northeast. With cooler temperatures in store.
1223 PM CDT Fri Sep 18 2020 Near- and sub-freezing temperatures across the Northland this morning will quickly climb above freezing by 14Z. Sunny skies are expected across the area for today with high temperatures in the low 50s to low 60s. Strengthening southerly flow on Saturday will usher in warmer and near-normal temperatures.
The lone exception might be down across Stanley, Jones and Lyman counties in the afternoon where RAP model low level RH progs along and south of an establishing Lee-of-the- Black-Hills surface trof could tank to around 20 percent, especially if any amount of westerly component can be introduced into the boundary layer mixing wind Saturday afternoon/evening.
Temperatures will likely cool into the low to mid 30s in those areas bringing the potential for early season frost. A quiet day is expected for tomorrow with highs well below normal in the low to mid 60s across the area.
600 PM CDT Fri Sep 18 2020 Expect cool and dry weather in central Illinois over the weekend as high pressure dominates the weather pattern over the region.
An upper-level ridge will build into the area this weekend. The weekend will see our driest air in months as dew points drop to the low to mid 40s. Low temperatures tonight and tomorrow night will be down into the 40s with highs tomorrow mainly in the lower 70s.
554 PM CDT Fri Sep 18 2020 In the overall pattern, a trough is making its way onshore along the West Coast while a ridge sits over the Rockies and another trough stretches from Hudson Bay through the East Coast.
738 PM CDT Fri Sep 18 2020 Expect cool and dry weather in central Illinois over the weekend as high pressure dominates the weather pattern over the region.
625 PM EDT Fri Sep 18 2020 A period of cooler temperatures is expected tonight and Saturday with the possibility of frost forming by early Saturday.
a fairly strong low pressure system is moving onshore northwestern Oregon. This low will be the feature to bring strong winds and critical fire weather conditions to the area tomorrow.
Drier air will continue to back door its way into the region behind a cold front as broad surface ridging exists over the Northeast and Upper Midwest. Overnight lows in many places should be a few degrees cooler than last night, under clear skies. /Issued 222 PM CDT Fri Sep 18 2020/ Upper level and surface ridging are strengthening across the area today which will ensure a dry and pleasant early Fall like weekend across eastern Oklahoma and western Arkansas.
As a result, overnight low temperatures in the low to mid 40s are expected. We had a quiet day today as cool high pressure continued to drift east through the Great Lakes region leaving us with southerly winds. Northwest flow aloft will give way to an upper ridge tomorrow.
633 PM CDT Fri Sep 18 2020 (This evening through Saturday) Tranquil weather will continue across West Central Texas through Saturday, with high pressure dominating. Lows tonight will be in the upper 50s and lower 60s, with highs tomorrow in the low to mid 80s.
Satellite indicates upper level low just beginning to push into Cascades. This activity will focus on where instability is marginal to decent and lift from upper low is expected to track, mostly in Oregon and possibly into southern Cascades of Washington.
1041 PM EDT Fri Sep 18 2020 Currently - A weak pressure pattern is in place across the area with a trough off the Atlantic coast and a dying ridge axis to our south. While ridging remains in place in the mid and upper levels, the lower level ridge is almost gone. Winds are now westerly through the lowest levels.
629 PM CDT Fri Sep 18 2020 High pressure continues over the area with dry air filtering in from the northeast.
/Issued 222 PM CDT Fri Sep 18 2020/ Upper level and surface ridging are strengthening across the area today which will ensure a dry and pleasant early Fall like weekend across eastern Oklahoma and western Arkansas.