Aikyam-Lab/Synoptic-Bench huggingface dataset:
1041 AM MST Tue Jan 9 2018 A broad upper ridge covers much of the CONUS this morning with upper troughs over both the east and west coasts. A strong cold front will cross the forecast area during the day on Wednesday with gusty northwest winds, falling temperatures and snow and areas of blowing snow.
257 PM CDT Fri Apr 13 2018 (Tonight) The upper low is over the Colorado/Kansas border with an upper trough extending across the southern Rockies. A cold front was moving south across the Texas Panhandle. The aforementioned cold front will move south across our area overnight. Temperatures will turn cooler overnight, with lows early Saturday morning expected to be in the lower to mid 40s. (Saturday through Friday) A cold front will move through the area early Saturday morning, resulting in gusty north winds and cooler temperatures.
This threat region typically resides in between the 500mb wind max (currently situated from about Amarillo to Hobbs) and the low level thermal ridge (located in NW Texas and western OK). As the base of the upper trough curls southeastward today and eventually atop the region tonight, some cold pocket showers are likely to continue expanding southward in the base of the trough.
Models are generally not backing off from snow amounts here, and since this system is occurring in April, there is a lot more moisture to work with, wrapping into the backside of the low. I will make a quick mention of the sunny skies east of the stratus, which has kept temperatures quite a bit warmer in our southeast, but as the low departs east, the stratus will win over eventually. The low and associated cold front has temporarily stalled, so it remains to be seen how long we can keep this clear area around. It appears that the front has made it far enough east to just keep us out of any elevated convection that may try to pop up behind the surface cold front tonight.
Temperatures will climb into the low 80s for many, but it will feel a little different for some.
Rain chances then increase with the approach of low pressure.
High pressure will return to the Interior West for the weekend.
This convection should march E into Scntrl AR/Ncntrl LA during the mid and late evening hours affecting ELD and MLU, with additional sct convection expected to develop farther W over E TX/SW AR along a cold front after 05Z, affecting much of E TX/SW AR/N LA overnight. This cap is expected to erode later today as a strong upper trough moves out of Northeast Colorado and into Eastern Kansas.
240 PM MDT Fri Apr 13 2018 Strong northerly flow aloft on the west side of a deepening trough over the midwest, will continue overnight. Freeze Watches were upgraded to Freeze Warnings for the lower elevations in the vicinity of Moab, Grand Junction, Montrose, Cortez, and the Paradox Valley. High pressure will gradually build in from the Great Basin Saturday with a slow warming trend.
The upper trough will be deepening to our west and a surface cold front will be approaching later in the period. An active couple days coming up as strong cold front moves through the Tennessee Valley with upper low hanging back over the Plains states. Strong ridging over the Atlantic will be shifting east.
By Saturday some ridging will be building into the area. Even with this ridging, there will be a weak wave moving through the flow that could bring a chance for some precip, mainly in the western zones. With the ridge building in expect temperatures to warm back up into the 50s for much of the area. We start the next work week under a strong southwest flow with lots of warm air as a powerful upper trough tracks into the northern Rockies. A good deal of moisture in this flow will affect the Absaroka/Beartooth Ranges, but the lower elevations may only see limited precipitation due to strong downslope flow.
Precipitation for the most part will cease for about 24 hours as high pressure dominates central and eastern Idaho. The ridge is short-lived; on Sun it begins to break down, albeit slowly.
/issued 905 AM EDT Fri Apr 13 2018/ A broad area of high pressure centered near Bermuda ridges west- southwest over the area producing continued pleasant weather. Atlantic high pressure is ridging across northern Florida and into the northeastern Gulf of Mexico today.
High pressure has built across northwest California, resulting in dryer conditions that will last through tomorrow.
525 PM EDT Fri Apr 13 2018 Dry weather is expected tonight under high pressure. Rain chances will increase over the weekend with approaching low pressure.
213 PM EDT Fri Apr 13 2018 High pressure centered off the coast will continue ridging into the southeastern states through Saturday.
During the night, a vicious cyclone has been centered close to the South- Central Nebraska/North-Central KS border. The cyclone will drift E along the Nebraska/KS line throughout today with the GFS slowest of all short-term solutions. The cyclone will begin to lift NE as it encounters large high pressure centered just off the Carolina Coast. This would send a strong cold front across KS tonight & Sat. No light freezing rain would occur early Sat morning as the post-frontal airmass is below freezing throughout the column during these periods. Quiet weather will dominate for most of the upcoming work-week as a sharp high pressure ridge moves E across KS Mon & Mon Night. An intense sfc cyclone that'll cross the Northern Plains will induce pronounced SW, then NW flow across KS the middle of the week.
Well-advertised moisture has surged ahead of this low into the warm sector, aided by 50 to 60 kt moisture transport winds.
Zonal 500mb flow will become more southerly this afternoon through tonight as an upper level low across the Plains moves eastward and strengthens. With increasing clouds and moisture, low temperatures will be warmer tonight compared to this morning, with lows in the lower to mid 60s.
Low ceilings will hang around through Saturday as strong low pressure moves through the region. Snow, freezing rain, and sleet are all possible at times.
216 PM MDT Fri Apr 13 2018 An upper level trof will continue to move eastward into the central Plains state today.
254 PM CDT Fri Apr 13 2018 A weak inverted trough remains along the ND/MT border late this afternoon. Strong low pressure over far southeast Nebraska is expected to linger over that area through tonight then exit eastward. Meanwhile, strong high pressure will continue to build over North Dakota, ending the snow over the southwest. Slightly warmer temperatures (mid to upper teens) far south central and southeast. High pressure remains over the area on Saturday.
406 PM CDT Fri Apr 13 2018 The Plains states will continue their busy day today and into Saturday with trough ejecting out of the intermountain west and into the central conus. The cold front has currently progressed into central Kansas and down through the OK/TX Panhandles.
Expect breezy north to northeast winds amd much cooler temperatures overnight and into Saturday morning.
117 PM EDT Fri Apr 13 2018 Dry and warm weather will continue into Saturday before rain chances again increase with the advance of low pressure. Dry weather is expected to continue into Sat morning as upper ridging amplifies in response to a digging trough over the Plains.
/Issued 437 AM EDT Fri Apr 13 2018/ Quiet but warm weather continues today before the influence of the next cold front effects the area on Saturday. The next cold front will be crossing the lower MS valley late on Saturday with increasing shower and thunderstorm chances, most so for n GA. This elongated cold front extends from the central great lake states down across MS/AL and out over the central Gulf.
Upper level ridging over Cuba extends northward over southern Florida and into the western Atlantic. Farther west, a closed upper low sits over the four corners region with associated troughing extending through the central part of the U. The ridge over Florida slips eastward by Saturday as the upper low and trough out west further deepens and moves closer to the area.
249 PM EDT Fri Apr 13 2018 High pressure Saturday, with showers across the Ohio Valley by Saturday afternoon ahead of cold front.
Cooler air will move into the northwest around sunrise with a change over to all snow. As cooler air fills in the areas of snow will shift southeast and east.
301 PM EDT Fri Apr 13 2018 The primary forecast concerns in the short term will be the potential for showers and storms on Saturday, the potential for locally heavy rainfall, and the timing of the passage of a cold front across the area. Most of the current model data is slowing down the eastward progression of a cold front this weekend. The latest model consensus is that the front will have a difficult time moving very far to the east at first, due to the influence of a stubborn ridge of high pressure that is forecast remain in place across the southeastern CONUS.
Freezing temperatures are likely late tonight and Saturday morning for the coldest eastern and southern valleys.
Looking ahead, we could be in for another round of storms tonight/ early Sat morning with the passage of the cold front itself. but the drier/cooler air will lag a bit behind the front and mid level clouds will hang in through the early afternoon Sat. Much cooler/drier weather on tap for the rest of the weekend as a weak/flat upper ridge settles over the region. Long-range models then push the next cold front toward the upper TX coast around Weds. Thereafter, guidance diverges a bit with timing/track of the next upper trof/low press- ure system developing/moving in from the Four Corners. Forecast will maintain caution flags nearshore and advisory offshore until 6Z tonight when winds should decrease as a cold front approaches.
242 PM CDT Fri Apr 13 2018 Warm front has drifted about 10 miles north of the far northern CWA border early this afternoon, roughly aligned just south of I-80.
1135 PM CDT Fri Aug 4 2017 High pressure was centered over northeast Kansas today providing temperatures that are much below normal. That story will change as the cold front that brought these cool temperatures, returns north as a warm front and is the focus for convection over the next several days. For tonight, the warm front will return into the forecast area after 06z.
901 PM CDT Fri Aug 4 2017 A cold front continues to push through the southern Tennessee Valley this evening, stretching roughly from Crossville, TN back southwest through Florence, AL. The dry conditions will continue through Saturday, as the cold front stall south of the area. The aforementioned cold front will begin to lift northward as a warm front late Saturday night.
For Saturday, partly cloudy skies and warmer temps return. The low level thermal trough modifies so expecting temps to show a decent rebound after the cool Friday.
High pressure will move over the region overnight, giving us calm winds and well below normal low temperatures in the middle to upper 50s. The high will move east of the PAH forecast on Saturday, and winds will shift to the south. We should see mostly sunny to sunny skies on Saturday with highs in the lower 80s and dew points in the 55 to 60 degree range. ECMWF and the Canadian are in fairly good agreement spreading precipitation into our west and northwest counties late Saturday night ahead of a low pressure system approaching the middle Mississippi and lower Ohio River valleys. GFS is about 6 hours slower with movement of the low and precipitation onset, but takes the low on the same general track.
Winds were trended toward hourly GFS which contained some of the higher guidance available. Maliawco Synoptic Setup: Hot high pressure resides over the western third of the CONUS and southern British Columbia. A large trough of cooler weather extends from the Great Lakes through the Canadian Prairie Provinces. Northeast Montana sets under the cooler side of northwest flow between these two large airmasses.
641 PM CDT Fri Aug 4 2017 High pressure was centered over northeast Kansas today providing temperatures that are much below normal. That story will change as the cold front that brought these cool temperatures, returns north as a warm front and is the focus for convection over the next several days. For tonight, the warm front will return into the forecast area after 06z.
Chattanooga Airport, TN 65 86 65 87 / 40 10 10 20 Knoxville McGhee Tyson Airport, TN 62 82 61 86 / 40 0 10 20 Oak Ridge, TN 61 83 62 85 / 30 0 10 20 Tri Cities Airport, TN 59 80 58 83 / 50 10 10 10.
1150 PM CDT Fri Aug 4 2017 Cooler pattern has brought temperatures down, with rain chances on the way. 500mb heights generally were decreasing across the CONUS but particularly associated with the Great Lakes trough and in the northwestern US. An 850mb high was centered over central KS, with a ridge axis extending through central NE into the central Dakotas, and a deep and deepening 850mb low was centered from northern Lake Michigan toward eastern Lake Superior. A cold pocket behind the low had brought temperatures as low as 5C to eastern IA, while 20C+ temperatures extended westward from the Rockies.
748 PM EDT Fri Aug 4 2017 High pressure will build into the region beginning tonight in the wake of a cold front pushing east of the area. The high will move across the region through the weekend.
959 PM CDT Fri Aug 4 2017 Upper low over eastern Wisconsin continues to move slowly east, but its influence extends back into eastern MN with just a few isolated showers into southeast MN, and more coverage from the northeast metro into northeast MN and certainly western WI. High pressure along the MN/SD border will drop to the southeast. Toss in northwest winds diminishing quickly this evening and turning to the south, and temps tonight will mainly be in the lower 50s. This will promote at least slightly cooler than normal temperatures and we will remain in a more favored area for weak embedded short waves affecting the region.
Dry high pressure will move into the area for the next 24 hours.
The environment, capped to an extent by deep high pressure will not remain very conducive to adt'l convective activity despite pending breeze collision along points south over Orange and Osceola counties. Low level ridge axis remains over the central CWA as a small slug of moisture advects N-NE around the western flank of the Bermuda ridge and across north Florida and the northern CWA. As the low level ridge axis edges slowly toward north Florida, low level S to SE winds will back and freshen slightly to more SE.
low temps in the low 70s are forecast behind the front.
CC A disturbance will move southeast over the region through the weekend, behind the Canadian cold front that brought gusty northerly winds today. This will bring cooler than normal temperatures for the period, as well as a chance of showers and isolated afternoon and evening thunderstorms.
Still forecasting a very warm night with minimum temperatures only reaching the lower 80s along the east coast metro region. An enlongated upper level 594 mb high pressure cell has sat stagnant over south Florida today. The warm atmosphere will hold through the night, with minimum temperatures generally only falling into the low 80s.
/Issued 343 PM CDT Fri Aug 4 2017/ The synoptic scale pattern continues to be dominated by broad cyclonic flow over the eastern CONUS with a weak area of high pressure over the southwestern states. Today, a few thunderstorms are trying to push off the higher terrain in northeastern NM. Thunderstorms should initiate along the lee trough as moisture convergence increases during the afternoon.
Otherwise, light winds will gradually veer around to the ESE or SE with time as a warm front lifts north through the state on Saturday.
1207 AM EDT Sat Aug 5 2017 Showers east of Interstate 79 will end as a cold front exits. Mainly dry weather is expected Saturday under building high pressure. Any remaining showers should end overnight as a cold front exits. Dry weather is expected overnight thereafter as the temperature and dewpoint drops under an approaching upper trough.
/issued 202 PM CDT Fri Aug 4 2017/ A broad upper trough encompassing much of the eastern CONUS this afternoon will translate eastward, with the flow aloft over our region transitioning from northwesterly to westerly. The flow aloft will be rather weak, but this will help spread a low level thermal ridge over the region the next couple of days, and send high temperatures around 5 degrees above normal.
1155 PM CDT Fri Aug 4 2017 The upper low over northern Lake Michigan early this afternoon continues to rotate eastward with the more expansive shield of low cloud shifting east of the area as subsidence occurs behind the wave.
656 PM CDT Fri Aug 4 2017 Hudson Bay low and associated closed low moving through the Great Lakes with a trough into the southeast CONUS. Sharp ridge along the west coast with record heat into the Pacific Northwest. Warm front to lift to the northeast across the forecast area tonight with warmer over night lows realized.
631 PM CDT Fri Aug 4 2017 Cooler pattern has brought temperatures down, with rain chances on the way. 500mb heights generally were decreasing across the CONUS but particularly associated with the Great Lakes trough and in the northwestern US. An 850mb high was centered over central KS, with a ridge axis extending through central NE into the central Dakotas, and a deep and deepening 850mb low was centered from northern Lake Michigan toward eastern Lake Superior. A cold pocket behind the low had brought temperatures as low as 5C to eastern IA, while 20C+ temperatures extended westward from the Rockies.
1054 PM EDT Fri Aug 4 2017 A cold front approaches from the west tomorrow and will cross the state Saturday night.
805 PM EDT Fri Aug 4 2017 A trough will remain near the coast through the weekend. A cold front approaching from the northwest will be near the forecast area tonight and Saturday.
632 PM CDT Fri Aug 4 2017 The synoptic pattern this afternoon features a strong PV anomaly across the Great Lakes region, helping to carve out a trough across the eastern CONUS. For tonight, an area of high pressure currently centered over eastern KS will spread eastward across Missouri. It will likely be in the low 60s within the urban heat island of St. This will cause the front that moved through as a cold front yesterday, to lift northward as a warm front.
814 PM EDT Fri Aug 4 2017 A cold front approaches from the west tomorrow and will cross the state Saturday night.
723 PM EDT Fri Aug 4 2017 A cold front will approach from the west this evening then will weaken while crossing the region Saturday.
1136 PM CDT Fri Aug 4 2017 Hudson Bay low and associated closed low moving through the Great Lakes with a trough into the southeast CONUS. Sharp ridge along the west coast with record heat into the Pacific Northwest. Warm front to lift to the northeast across the forecast area tonight with warmer over night lows realized.
753 PM EDT Fri Aug 4 2017 Warm and more humid conditions will prevail for the rest of today until a strong cold front pushes east through the region tonight, bringing cooler and drier conditions for the weekend. Storms will persist for a few hours after dark (01-06z Sat) given the degree of large-scale ascent with vigorous upper level system and timing of the seasonably strong surface cold front. Following the cold front, Saturday will turn significantly cooler with just the chance of a few showers/thunderstorms as the still strong mid summer sun and relatively cold air aloft combine to support steepening lapse rates with daytime heating.
513 PM MDT Fri Aug 4 2017 00Z TAF CYCLE Sct to nmrs showers and thunderstorms moving northwest to southeast off the higher terrain and into the RGV and ern plains. Cooler temperatures aloft will result in many storms with small hail through this evening.
604 PM CDT Fri Aug 4 2017 The upper low over northern Lake Michigan early this afternoon continues to rotate eastward with the more expansive shield of low cloud shifting east of the area as subsidence occurs behind the wave.
Gosselin The synoptic pattern this afternoon features a strong PV anomaly across the Great Lakes region, helping to carve out a trough across the eastern CONUS. For tonight, an area of high pressure currently centered over eastern KS will spread eastward across Missouri. It will likely be in the low 60s within the urban heat island of St. This will cause the front that moved through as a cold front yesterday, to lift northward as a warm front.
949 PM EDT Fri Aug 4 2017 High pressure will build into the region beginning tonight in the wake of a cold front pushing east of the area. The high will move across the region through the weekend.
1058 PM EDT Fri Aug 4 2017 Late evening surface analysis depicts the axis of Atlantic ridging (1024 millibars) positioned over central Florida. Convection has moved into the coastal waters, with upstream activity well to the northwest of our region associated with the digging trough. Some mid-level dry air will also enter our region from the south as the deep layer ridge over the Bahamas builds northward, which could enhance the wet microburst potential over north central Florida during the late afternoon hours. The axis of Atlantic high pressure will gradually lift northward this weekend, but will remain positioned just south of the northeast Florida waters this weekend.
1212 AM EDT Sat Aug 5 2017 Isolated showers over northeast portions of the area will end early this morning and cloud cover decrease as high pressure approaches from the west. This high will provide partly sunny skies today which should allow for warmer temperatures than yesterday, with afternoon highs in the mid 70s.
A cold front with scattered thunderstorms will continue to push southeast of all terminals this evening.
904 PM EDT Fri Aug 4 2017 A cold front will move across the Appalachians and central mid Atlantic region overnight. High pressure will then bring a pleasant start to the weekend, before a warm front moves up form the south and lingers over the region.
1033 PM EDT Fri Aug 4 2017 A cold front has cleared the forecast area this evening with breezy winds moving in behind. High pressure will shift south of the area on Saturday.
803 PM EDT Fri Aug 4 2017 Scattered showers and thunderstorms this afternoon and evening, some strong, ahead of a cold front. Cooler and less humid Saturday.
This afternoon, high pressure resided over the area bringing light winds and clear skies over northeast Kansas. A lee cyclone develops in eastern Colorado through the afternoon shifting a frontal boundary across parts of central and northeastern Kansas. Once again, this seems to be a conditional threat and will depend on how much destablilzation can occur behind this warm frontal boundary. Temperatures tomorrow will be even cooler than today due to the precipitation and cloud cover, with heights ahead of the boundary in the mid 70s and into the 80s near central Kansas. This wave appears to drive a cold front through the area, and by the evening it should be pushing into southeast KS. Also in question will be the coverage of storms along the advancing cold front in the late afternoon.
18Z surface data has high pressure along the KS/MO border north into the northern Plains. Quiet and dry conditions will be seen across the area late this afternoon and overnight as Canadian high pressure moves through the Midwest. Saturday night: Low pressure is expected to track east along the main synoptic front through the Central Plains and mid MS River valley, drawing gulf moisture northward for a possibly heavy rainfall event across eastern KS into northern MO. Increasing dewpoints and cloud cover will lead to a warmer night with lows in the upper 50s to lower 60s.
623 PM CDT Fri Aug 4 2017 Upper level low pressure trough in Canada late this afternoon will continue to make its way southeast into our region tonight and Saturday. With the cloud cover and cooler air, 70s for highs on Saturday look good.
Precipitation may be just a little slower to develop than initially thought, with the latest data suggesting a start time around 10Z (5 AM) over southeastern Kansas, with precip then lifting northeast along the nose of the low level jet into Central Missouri toward mid day.