Aikyam-Lab/Synoptic-Bench huggingface dataset:
624 PM CDT Mon Apr 3 2017 Upper level TROF is swinging thru our forecast area currently and is helping to kick off scattered to numerous showers and thunderstorms, mainly in areas where the moisture convergence is most focused: for areas near and south of I-70. Models have been fairly consistent, however, at advertising a moderately strong RIDGE-runner disturbance that will bring the chance for showers to areas northwest and west of STL metro for Tuesday afternoon but at the time it should have limited moisture to work with and so kept PoPs below likely category. The higher PoPs and more persistent pcpn looks set to hold off until Tuesday night with lift from the main system entering our region.
A large mid level cyclone continues to lift northeast and away from the Mid South this evening. /issued 324 PM CDT Mon Apr 3 2017/ Mid-afternoon GOES visible imagery showed an upper low centered near St. Banded showers and thunderstorms were moving through the Midsouth ahead of a weak midlevel trof extending south of the upper low. Thereafter, low level instability will wane and the upper low will lift into the upper Midwest. Low amplitude upper level ridging will lead to fair weather and mild temps on Tuesday. The next in series of upper level lows will lift from the southern plains into the mid-MS River valley Tuesday night.
The forecast area remains under high pressure and a dry air mass. Some mid level clouds will move into the coast and Umpqua Basin late tonight and Tuesday morning as a warm front brushes past to the north. Conditions will improve tonight into Tuesday as high pressure builds inland.
Dry weather will prevail tonight and Tuesday morning as a ridge moves across Western Washington.
The last push for the upper trough is still kicking off showers and a few thunderstorms this evening, with the stronger cells off to the north of the mid state. Precip should move off to the east this evening as the upper trough moves out of the area, and still have some chances for the Plateau after midnight.
705 PM EDT Mon Apr 3 2017 A strong upper level system and associated cold front will move northeast and east of our region tonight. Weak high pressure crosses our area Tuesday and Tuesday night.
711 PM CDT Mon Apr 3 2017 Visible satellite showed a rapid west-to-east clearing of the high-level cloud canopy from earlier rain and thunderstorms. A swath of subsidence immediately behind the departing complex is aiding in a zone of sunshine, though just to the west of this axis we're seeing cumulus inbound in association with wrap-around moisture/lift from the parent low pressure northwest of the region.
A storm system will bring a major change to cooler and wet weather. A dry cold front slipped rather innocently southward through the CWA late last night. This should be no surprise, but a major warmup is coming next as an upper level ridge of high pressure builds over central California during the next 48 hours.
617 PM CDT Mon Apr 3 2017 Updated aviation portion for 00Z TAF issuance Dry and a little warmer with some sun Tuesday, then a couple blustery and chilly days before much warmer conditions return for the weekend. The new pattern will be characterized by a trough over the eastern Pacific and downstream ridging over the central CONUS.
632 PM CDT Mon Apr 3 2017 The SREF and most of the rapid refresh models develop fog between Pine Ridge. Weak high pressure is in place and skies are forecast to clear for several hours tonight. We continue to be in an active pattern with several short waves and long wave troughs spinning into closed low pressure systems traverse the CONUS. Tomorrow a long wave trough moves across the Rockies and undergoes cyclogenesis in the southern Plains.
An upper low along the Utah Arizona border will continue to track off to the southeast overnight. A weak but cold disturbance will brush northern Utah late tonight and Tuesday, followed by the return of high pressure midweek. A closed upper low center is apparent in satellite this evening moving thru swrn UT and into nrn AZ. More stratiform and lighter wrap around precip persists across srn UT at this time but will be waning thru midnight as the upper low continues to slide sewd. Ridging begins building over the area late Tuesday then shifts east Thu. This will bring a significant warming trend Wed thru Thu with temps staying warm Fri as winds increase ahead of the next Pac trof.
Small Craft Advisories remain in effect for both the near shore and offshore coastal waters, as south-southeasterly winds continue to strengthen ahead of a pre-frontal trough.
Winds relax and veer around to the northwest with the cold front - after 06z at CLL and around 10-11z/05 at IAH. subsidence rules with clear skies affording many communities maximum temperatures in the lower to middle 80s. depending on the ambient temperatures as many dew points have mixed out into the lower to middle 50s (inland) to lower 60s along the coast. After a cool starry evening of areawide interior minimum Ts in the lower 60s.
However enough QG forcing and some low to mid-level convergence should be present with the mean trough for a large area to see some snowfall along and east of the Divide.
subsidence rules with clear skies affording many communities maximum temperatures in the lower to middle 80s. depending on the ambient temperatures as many dew points have mixed out into the lower to middle 50s (inland) to lower 60s along the coast. After a cool starry evening of areawide interior minimum Ts in the lower 60s.
/issued 225 PM CDT SAT AUG 20 2016/ A cold front is moving south through the northern Permian Basin this afternoon, preceded by an outflow boundary/prefrontal trough which is near the Pecos River. Showers and thunderstorms have been slow to develop, but with heating this afternoon, and the arrival of the front, it appears widely scattered showers and storms will be possible over most of the Permian Basin with better chances over the higher terrain where upslope flow will increase the next 6 hours. A fairly strong upper level trough, at least for August, over the midwest this afternoon will translate eastward.
935 PM EDT SAT AUG 20 2016 Update A cold front will continue to slide east across the CWA this evening bringing an end to the storms. Showery cooler and breezy weather will continue into Sunday.
605 PM CDT SAT AUG 20 2016 250 PM CDT Scattered showers with brief heavy downpours will continue east this afternoon and evening ahead of a cold front. Following the cold frontal passage expect a mostly cloudy and breezy afternoon and early evening with isolated showers tapering west to east. KMD 250 PM CDT Sunday will be cooler with a slight chance of light rain showers. However, the vorticity associated with the back side of the upper level trough could cause a few showers to form.
804 PM EDT SAT AUG 20 2016 A strong cold front will move through the forecast area overnight and a secondary trough will follow Sunday evening. High pressure will then be positioned across the region for much of the week.
Even a few showers over the lower portions of the Louisiana coastal parishes.
Fortunately, the MCV to this point has been moving quickly enough that the highest observations reported to this point have been 2 inches or less.
A trough of thermally induced low pressure over western Oregon will continue to slowly move east of the Cascades tonight. Increasing onshore flow will spread a cooler air mass across the area Sunday.
513 PM MDT SAT AUG 20 2016 Water vapor imagery shows upper trough exiting the nrn plains as it pushes into the upper Midwest. Upper ridging dominates the wrn CONUS.
(ISSUED 650 PM CDT SAT AUG 20 2016 ) The cold front continues to slowly move through Arkansas this evening. This was triggered by an upper short wave system moving through the region, while the expected cold front has only made progress to far northwestern AR at this time. The upper level low pressure trough is deepening in the eastern Plains at this time and will help the movement southeast of the cold front.
It's not until the main upper trough axis swings through that the deeper moisture will be really pushed out of the area. By daybreak, temperatures are expected to range from the low 60s across southwest Indiana to the low 70s across southern Kentucky. Expect rounds of showers and scattered storms to continue through tonight until the approaching cold front passes through the region late tonight. For Sunday, a much more pleasant airmass and partly cloudy skies await us behind the cold front.
After a brief lull, another round of -TSRA is possible Sunday as a cold front sweeps in from the west.
High pressure will remain over the forecast area tonight. A building upper level western ridge will expand eastward towards the western plains on Sunday.
635 PM CDT SAT AUG 20 2016 Cold front looks to have reached I-57 this afternoon although not well defined as it crosses the area. Could be an isolated lightning strike to the west as the most vigorous of the scattered showers west of the front have pushed a bit above the freezing level. The models remain in good agreement that the upper trough axis will make steady progress east of Illinois Sunday night. However, light winds and clear skies Sunday night should allow for favorable radiational cooling conditions, and lows dropping to the low to mid 50s, which will be our coldest low temps in several months. The NAM and GEM continue to advertise even colder lows, but continued to lean toward the warmer ECMWF by using a GEFS mean compromise.
Tonight and Sunday Scattered showers continued to push across the area early this afternoon as low pressure moved into far northeast WI and a digging upper trough worked across MN. The low will deepen to around 990mb over eastern Lake Superior this evening then continue to track NE into Canada. Gradient tightens up as the low deepens, but the best gradient stays to our north plus not the optimal time of day for mixing, so wind gusts only around 20 mph are expected. As the low continues to depart on Sunday, ridging builds into the western Great Lakes through the day. Cyclonic flow behind the low will keep plenty of clouds in the area through Sunday morning, with any areas of clearing filling in with daytime cumulus clouds.
Weak cold front will remain south of the area overnight. /issued 355 PM CDT SAT AUG 20 2016/ (Tonight and Sunday) Models this cycle indicate the best rain chances will shift, with this weak cold front, to our southeastern counties. The best rain chances remain over our southeastern counties through Sunday night; then, those better chances shift to our northwestern counties, as a broad upper trough produces flow from the southwest over our area.
For Sunday, a cold front will make it's way across the region, bringing additional showers and thunderstorms for at least the first half of the day. Behind the frontal passage, cooler and dryer air will move into the region and rain will end. Some clearing is expected later in the day, and highs will top out in the low to mid 80s in most locations. Chattanooga Airport, TN 72 85 65 86 / 60 70 10 10 Knoxville McGhee Tyson Airport, TN 71 82 62 83 / 70 70 10 10 Oak Ridge, TN 71 82 61 84 / 80 60 10 10 Tri Cities Airport, TN 68 80 58 81 / 70 70 10 10.
/issued 238 PM CDT SAT AUG 20 2016/ Cooler and drier air will continue to filter south tonight into Sunday, making for a clear, cool night and pleasant day tomorrow.
1043 PM EDT SAT AUG 20 2016 An upper level ridge will extend from the Atlantic westward into the Gulf of Mexico through Sunday. Temperatures will remain above normal ahead of an approaching cold front.
908 PM EDT SAT AUG 20 2016 A strong cold front will move through the forecast area overnight and a secondary trough will follow Sunday evening. High pressure will then be positioned across the region for much of the week.
742 PM EDT SAT AUG 20 2016 An upper level ridge will extend from the Atlantic westward into the Gulf of Mexico through Sunday. Temperatures will remain above normal ahead of an approaching cold front.
It is a very quiet evening after a hot summer day under a high pressure ridge aloft. This upper ridge will keep conditions very warm to hot through Sunday. The next weather system to affect the forecast area will be a dry cold front from the northwest that will arrive late in the day Sunday and Sunday evening. Winds will increase ahead of and with this cold front. VFR conditions are expected during the next 24 hours with mainly just some mid and high clouds above 12K feet, especially as a cold front moves through the region late Sunday.
919 PM EDT SAT AUG 20 2016 High pressure will move east into the Maritimes tonight into Sunday.
Our weather today was much like yesterday, with areas of morning low clouds and afternoon high temperatures slightly cooler than normal in most locations. Temperatures on Sunday are expected to be near persistence or slightly cooler given the trend towards stronger onshore flow. Cyclonic circulation around a weak upper low off Point Conception continues to draw mid and high level moisture westward across California. However, other models do not show this and instead continue to confine afternoon convective precipitation to the higher mountains like the Sierra Nevada, which is more typical in this type of pattern. Slightly warmer temperatures are likely be midweek as an upper level ridge builds just offshore. SFO Bridge Approach.
533 PM MDT SAT AUG 20 2016 Trough passage yesterday has caused winds to shift to the west through northwest today. Mostly though, a few cumulus clouds will remain over the higher terrain with temperatures right around normal. For Sunday, a very broad area of high pressure will remain over the southern portions of the U. while low pressure remains off the Pacific Coast.
623 PM CDT SAT AUG 20 2016 Early afternoon water vapor imagery indicated seasonably deep upper-level trough lifting into the Great Lakes. Good mixing with the dry air though should allow for a bit warmer day with highs climbing back near or just above 80 most areas.
Upper level ridge centered over California will shift east into Nevada Sunday. Enough moisture and instability will be over the higher terrain south of Interstate 70 for isolated storms through early evening. High pressure remain over the region tonight. Moisture and instability will be limited again with most of the showers and storms expected to be over the higher terrain south of Interstate 70.
For the late evening and overnight hours, we expect an increase in coverage of showers and thunderstorms as a cold front moves into the region. Showers and thunderstorms continued in close proximity to a weak cold front/surface boundary sagging south over Central Texas and an MCV over the I-35 corridor between San Antonio and Austin. The main focus of the rain and flooding will be along the I-35 corridor into the Hill Country with the highest potential in the San Antonio area to parts of the Austin area.
938 PM CDT SAT AUG 20 2016 A cold front currently stretches across the Missouri Bootheel and Northeast Arkansas. A cold front extends from eastern Wisconsin through southeast Missouri and into central Texas. As the cold front moves into the forecast area tonight, more showers and thunderstorms are expected to develop over the region. The cold front will move through north Mississippi on Sunday with thunderstorms ending behind the front. Temperatures will be similar to today with highs in the low to mid 80s. The cold front will slow down and stall out across southern Mississippi Sunday night which will mean that there could be some isolated showers over southern portions of the forecast area.
In the low to mid levels of the atmosphere, a feeble Atlantic ridge of high pressure will extend across south Florida overnight. In the upper levels of the atmosphere, an area of low pressure will progress westward across the northwest coast of Cuba tonight. Despite ample atmospheric instability and moisture in place for convection, synoptic scale subsidence in the low to mid levels of the atmosphere warrants no more than dime POPs for tonight.
650 PM CDT SAT AUG 20 2016 The cold front continues to slowly move through Arkansas this evening. This was triggered by an upper short wave system moving through the region, while the expected cold front has only made progress to far northwestern AR at this time. The upper level low pressure trough is deepening in the eastern Plains at this time and will help the movement southeast of the cold front.
1145 PM CDT SAT AUG 20 2016 Early afternoon water vapor imagery indicated seasonably deep upper-level trough lifting into the Great Lakes. Good mixing with the dry air though should allow for a bit warmer day with highs climbing back near or just above 80 most areas.
904 PM EDT Sat Aug 20 2016 Showers and possible thunderstorms are expected with the approach and passage of a cold front through early Sunday, before building high pressure brings dry and less humid weather through mid week. The 500 mb trough axis will push through Sunday night.
831 PM EDT SAT AUG 20 2016 A cold front will move through the region this evening. A few lingering showers are possible early tonight, then cooler, drier and less humid air will begin to move into the region. The cooler and less humid air will linger into the start of the new work week. Lows tonight will be in the 60s while highs on Sunday will only be in the lower to middle 70s. Broken line of convection along pre-frontal trough will continue to work east through the forecast area into early evening. Models have remained consistent with secondary and tertiary short waves driving through mean trough Sunday with wrap around moisture clipping our far north. cooler and less humid.
Scattered showers and a few thunderstorms will continue to affect the area as a cold front approaches.
Expect temperatures to be a couple degrees warmer than last night, with low 50s expected across most of the area. Tempeatures will be slightly warmer for Sunday, as there the area will be a little be drier letting tempeatures get up to near 90 degrees for most places.
1044 PM MDT SAT AUG 20 2016 Water vapor imagery shows upper trough exiting the nrn plains as it pushes into the upper Midwest. Upper ridging dominates the wrn CONUS.
While dewpoints have recovered in the east to the lower and mid 50s. Hill City KS 50 degrees set last set in 2009 McCook NE 48 degrees set in 1950 Goodland KS 46 degrees set in 1964 Colby KS 46 degrees set in 1964 Upper height rises on the order of 5 dam are forecast for the next 24 hours as a ridge builds over the central Rockies and adjacent plains. high pressure centered over the central High Plains today will move east by tomorrow.
Also watching convection west of Laredo associated with another short wave trough over Coahuila.
741 PM EDT Sat Aug 20 2016 Showers and possible thunderstorms are expected with the approach and passage of a cold front through early Sunday, before building high pressure brings dry and less humid weather through mid week. The 500 mb trough axis will push through Sunday night.
/Issued 903 PM CDT SAT AUG 20 2016/ Much drier air continues to spread into the area behind a cold front, which will result in temperatures falling well below seasonal averages overnight. Fair weather on Sunday as high pressure builds into the Southern Plains and surface front stalls to our south.
621 PM CDT SAT AUG 20 2016 High pressure will remain over the forecast area tonight. A building upper level western ridge will expand eastward towards the western plains on Sunday.
635 PM CDT SAT AUG 20 2016 Cold air advection in the wake of last night's cold front has kept temperatures quite cool today with afternoon temperatures in the lower 70s and even upper 60s in spots. Clearing skies and light winds will allow temperatures to fall to the lowest readings we've seen in a couple of months with lows tonight in the lower and middle 50s. Large-scale ridging building into the central U.
844 PM EDT Sat Aug 20 2016 A cold front over Ohio will move through the central Mid-Atlantic Sunday afternoon into the evening.
715 PM EDT SAT AUG 20 2016 A trough of low pressure will continue to bisect the area today before dissipating later tonight. A cold front will move through from the west late Sunday night. Cooler high pressure will build from the north through midweek leading to drier and less humid conditions. Cold front will approach the region on Sunday causing winds will pick up out of the SW 10 to 15 knots before changing to W Sunday evening. High temperatures will reach the low 90s in most places with increased sunshine compared to Saturday. With dewpoints in the mid 70s, heat index values look to reach the low 100s for a few hours in the afternoon.
Numerous showers and storms will continue to move across the area tonight and tomorrow, as a cold front approaches from our west. Later this evening, however, lines of showers and storms are expected as the cold front moves closer to us and eventually through the area. The surface cold front is aligned from northwest Indiana, to southern Illinois, and eventually down across eastern Arkansas. Plenty of convection is occurring well ahead of the cold front, with abundant moisture advecting into the Mississippi Valley with falling heights aloft. Showers and scattered thunderstorms will continue to fill in across eastern Kentucky through tonight as the cold front and upper level trough axis approaches from the northwest. Mostly clear skies will reign Sunday night, as high pressure builds in from the west.
908 PM EDT SAT AUG 20 2016 Warm and humid conditions, along with the threat for showers and thunderstorms, will persist until a cold front moves through the area tonight. High pressure will then settle into the Ohio Valley for the beginning of the week, bringing dry and cooler weather. Line of showers and thunderstorms associated with the pre frontal trough are just about to the I-71 corridor. The actual cold front is just now moving into northwest Indiana. Sunday morning the cold front will clear the rest of the CWA allowing drier air to filter into the area. Also during the day Sunday the upper level trough axis will push into the area with moderate CAA moving in.
535 PM MDT SAT AUG 20 2016 Upper height rises on the order of 5 dam are forecast for the next 24 hours as a ridge builds over the central Rockies and adjacent plains. high pressure centered over the central High Plains today will move east by tomorrow.
903 PM CDT SAT AUG 20 2016 Much drier air continues to spread into the area behind a cold front, which will result in temperatures falling well below seasonal averages overnight. Fair weather on Sunday as high pressure builds into the Southern Plains and surface front stalls to our south.
/issued 938 PM CDT SAT AUG 20 2016/ A cold front currently stretches across the Missouri Bootheel and Northeast Arkansas. A cold front extends from eastern Wisconsin through southeast Missouri and into central Texas. As the cold front moves into the forecast area tonight, more showers and thunderstorms are expected to develop over the region. The cold front will move through north Mississippi on Sunday with thunderstorms ending behind the front. Temperatures will be similar to today with highs in the low to mid 80s. The cold front will slow down and stall out across southern Mississippi Sunday night which will mean that there could be some isolated showers over southern portions of the forecast area.
1202 AM CDT SUN SEP 25 2016 The main portion of a strong upper low/trough over the Northern Rockies will lift northeastward across the Northern/Central Plains and Upper Mississippi Valley tonight through Sunday night, while the southern portion of this trough breaks off and shifts southwestward into northern Mexico and the Baja region. Forcing for ascent from the right-rear quadrant of an upper jet streak, and low-level convergence near the front will be focused in this high moisture corridor. This will support numerous showers/thunderstorms in especially central/south-central Kansas through about 06z tonight, with the higher rain probabilities then shifting to the Flint Hills/Southeast KS late tonight into midday Sunday.