Aikyam-Lab/Synoptic-Bench huggingface dataset:
1037 PM EDT Mon Sep 14 2020 Canadian high pressure will build into the region the first half of this week.
Although Hurricane Sally won't have direct impacts to us, the increasing moisture content will result in a warmer night with lows in the upper 60s and low 70s.
724 PM EDT Mon Sep 14 2020 Canadian high pressure will build across and offshore the middle Atlantic through mid week. The 1030mb high over the great Lakes will shift toward the Mid Atlantic and provide a brief shot of cooler/drier air on Tuesday. Moisture will then begin to increase again from the south, part part as the high migrates away from the region, and also as the remnants of Hurricane Sally move into the Gulf Coast states.
The high pressure system will slide eastward over New England while maintaining a nose into the Mid Atlantic southern Appalachian region. An unseasonably deep upper level low will swing across Hudson Bay through the middle of the week, spreading broad cyclonic flow from the Upper Midwest through the Great Lakes and Ohio Valley.
1020 PM EDT Mon Sep 14 2020 Canadian high pressure will build across and offshore the middle Atlantic through mid week. Radar showed all of the showers and thunderstorms from the cold front passage have moved south into SC, with cold air advection bringing a cooler and drier airmass into central NC. Other locations are expected to drop into the low 60s and even the upper 50s for areas of the NE Piedmont and northern Coastal Plain, which is near seasonal normals for mid-September. The 1030mb high over the great Lakes will shift toward the Mid Atlantic and provide a brief shot of cooler/drier air on Tuesday. Moisture will then begin to increase again from the south, part part as the high migrates away from the region, and also as the remnants of Hurricane Sally move into the Gulf Coast states.
255 AM MDT Tue Sep 15 2020 Broad mid/upper level ridge dominates the western half of the CONUS early this morning. Little change expected today compared to yesterday with rather warm and dry weather with the prevailing ridge aloft. On Wednesday, the ridge aloft will retrograde to the west in response to a deepening trough over southern Canada and Upper Midwest/Great Lakes. This will allow a dry backdoor front to progress south and west into the CWA, resulting in cooler temperatures with highs in the 70s to lower 80s.
Limited moisture within the low level warm advection keeps conditions dry and clouds mainly north with the possible exception of some mid level coverage brushing the Tri Cities and northern Thumb. Filtered sunshine is still expected to help lift temperatures back into the 70s when combined with the warmer SW flow which then holds temperatures in the 50s tonight. The low level moisture supply into the front is looking better in model depictions which indicate surface dewpoint reaching the lower 60s and around 10 C at 850 mb.
Guidance has been consistent with showing mixing up to around 900mb, perhaps slightly higher, as recent WAA has placed a cap of warmer air around 850mb. On Wednesday a rather strong cold front will drop south through the area, bringing a pronounced push of cooler air into the region for the second half of the week. Forecast soundings show a very shallow/limited moist layer in the low levels accompanying the front, so most guidance points to a dry frontal passage with scattered clouds.
/issued 307 PM CDT Mon Sep 14 2020/ Midsouth weather through the weekend will be marked by the remnants of Hurricane Sally passing to our southeast with minimal impacts Wednesday/Wednesday night, followed by a late week cold front.
354 AM CDT Tue Sep 15 2020 Weak mid level ridging and lacking moisture has kept our skies mostly clear this morning with just some occasional high clouds. Current temperatures this morning are generally in the 70s and will rise to the low to mid 80s by this afternoon.
152 AM EDT Tue Sep 15 2020 Seasonably cool temperature will moderate slightly through mid week, but expect cooler weather thereafter.
This morning, a weak cold front was dropping through the forecast area, oriented southwest-northeast and extending through Dickinson to Harvey as of 830 UTC, with some increased cloud cover along the front and winds shifting to the northwest behind it. Hoping that today will be the only day where we have much smoke in the lower levels, with the highest concentrations in western North Dakota where we could see reduced visibilities. Flow aloft becomes northwesterly midweek, with a deepening upper low over the Hudson Bay, and another upper low off the coast of the Pacific Northwest.
Winds remain fairly light, so any smoke that is stuck especially in the lower elevations is likely to remain in place.
404 AM EDT Tue Sep 15 2020 High pressure over the eastern Great will shift to the East Coast today.
1204 AM EDT Tue Sep 15 2020 VFR conditions will prevail with light and variable winds become south on Tuesday as the center of high pressure builds off to the east. The low level warm air advection will boost daytime highs into the 70s. A cold front will be driven into Se Mi late in the day Wednesday. A deepening polar low forecast to rotate across Hudson Bay on Wednesday will help drive this cold front into the southern lakes late Wed/Wed night.
(Today and tonight) Low to mid-level clouds are currently streaming in from the southwest across the majority of the area out ahead of a weak upper low centered over New Mexico. At the surface, a ridge axis extends into our area from high pressure centered over the northeastern US. The area of clouds will shift eastward through the day, but will help keep temperatures mild, in the low 80s for high most areas.
CD Chattanooga Airport, TN 84 67 77 67 76 / 30 10 50 70 80 Knoxville McGhee Tyson Airport, TN 85 65 80 66 75 / 20 10 30 60 80 Oak Ridge, TN 86 65 81 65 76 / 20 10 30 50 70 Tri Cities Airport, TN 82 59 80 62 74 / 10 0 20 50 70.
High pressure will keep it dry through Tuesday night.
A cold front will usher drier air as it drops southward over the state Tuesday night.
710 PM EST Wed Nov 17 2021 An approaching cold front will provide rain tonight along with much colder temperatures Thursday.
A ridge of high pressure will continue to be the dominant feature over the Northern Rockies tonight into Thursday.
A surface cold front has entered northwest Arkansas and will sweep southeast through the overnight hours into early Thursday morning.
A cold front will move southeast across central Indiana late today and tonight. Trailing well behind the front will be a sharp upper trough.
/issued 321 PM CST Wed Nov 17 2021/ The surface pressure gradient will continue to relax this afternoon as the cold front that moved through the region this morning moves farther to the south. High pressure will continue to build into the area tonight, resulting in temperatures falling into the 20s for the southwestern Panhandle and northwestern South Plains and low 30s elsewhere. Surface flow will remain mostly northerly through tomorrow morning, resulting in reinforcement of cold air and highs only increasing into the low 50s on the Caprock and upper 50s to near 60s off the Caprock. GKendrick A low amplitude progressive upper level ridge will shift ESE tomorrow, followed by zonal flow through through the weekend. Upper level ridging across old Mexico will enhance the southern jet to our west and southwest.
At 700mb, the SSE is helping to advect warmer and more moist air over the peninsula.
A backdoor cold front will push through gaps in the central mountain chain this evening with an occasionally gusty east wind in the central valley from Santa Fe southward. The strong back door cold front has made it all the way through all of the east and is resting against the east slopes of the central mountains. It will pour into the Rio Grande Valley this evening and to the continental divide tonight, resulting in a cooler day Thursday for central areas. In contrast the east will be much warmer.
459 PM CST Wed Nov 17 2021 Strong northwest winds will continue through the night but the higher gusts that are mixing down with diurnal heating will abate around sunset. The low level thermal field is a touch cooler than today so highs appear as though they will be about 3 to 6 degrees cooler. A ridge of high pressure will move in from the west so winds will diminish through the afternoon, especially west of I-29.
305 PM CST Wed Nov 17 2021 Strong southerly winds continue across the Mid-South this afternoon ahead of an approaching cold front. However portions of Northeast Arkansas and the Missouri Bootheel, remain in the upper 60s due to stratus streaming northeastward ahead of an approaching cold front. The cold front will move through the Mid-South tonight. Temperatures will be cooler with highs in the lower to mid 50s across much of the area.
613 PM CST Wed Nov 17 2021 We opted to end the high wind warning at 6 PM CST, but did go with a wind advisory north central and across portions of the James River Valley for another few hours till 04Z (10 PM CST).
Satellite imagery was showing dominate feature being a large upper low with its surface reflection centered over western Ontario. A cooler air mass filtering in will translate to chilly conditions on Thursday.
Tomorrow, it'll remain windy, and it'll be clear for the first half of the day before a trough swings through during the late morning and afternoon hours, bringing some midlevel clouds. Highs tomorrow will be a few degrees above freezing.
We are seeing slow height rises and scattered high clouds are beginning to spill over the ridge.
Weak troughing across the southwestern United States today will become near zonal flow through the weekend.
On Thursday mid-level flow turns more westerly as a transitional ridge axis passes over the state.
544 PM CST Wed Nov 17 2021 Scattered showers will end from the west this evening, as a cold front pushes through the region. At 19z a strong cold front stretched from Taylorville to west of Rantoul. Where skies clear earlier, lows at or below freezing are expected west of I-55, while where clouds hang on longer south of I-70 upper 30s are forecast. Cold advection continues Thursday as a 1030 mb ridge slides down the Plains. This yields highs several degrees below normal in the low/mid 40s.
321 PM CST Wed Nov 17 2021 The surface pressure gradient will continue to relax this afternoon as the cold front that moved through the region this morning moves farther to the south. High pressure will continue to build into the area tonight, resulting in temperatures falling into the 20s for the southwestern Panhandle and northwestern South Plains and low 30s elsewhere. Surface flow will remain mostly northerly through tomorrow morning, resulting in reinforcement of cold air and highs only increasing into the low 50s on the Caprock and upper 50s to near 60s off the Caprock. GKendrick A low amplitude progressive upper level ridge will shift ESE tomorrow, followed by zonal flow through through the weekend. Upper level ridging across old Mexico will enhance the southern jet to our west and southwest.
842 PM EST Wed Nov 17 2021 A cold front will return rain to the region for Thursday, with some scattered snow showers following the front. No major changes were needed for the eve update as a cold front will cross the region on Thursday.
638 PM EST Wed Nov 17 2021 A cold front will bring rain tonight before skies begin to clear late.
The upper low continues to move across southern Canada, now into Ontario as of 20Z. This leaves a broad trough into much of the nation's midsection with low-amplitude ridging moving onto the Pacific coast. At the surface in the wake of the cold front, high pressure has been building in and north winds have been persistent with gusts still in the 25-35mph range for most of the area.
Clouds will increase toward morning, but remain VFR until early afternoon as a cold front approaches from the west. Discussion: The main focus for the short term period will be a strong cold front arriving tomorrow morning. This will push a cold front east through TN and into the forecast area by shortly after daybreak tomorrow morning. It will be breezy on the ridges and mountaintops, but H85 winds will be southwesterly so mountain waves aren't on the table. Temperatures will be a bit tricky as the cold front will be fairly strong and looks to arrive during the morning hours.
307 PM CST Wed Nov 17 2021 The surface pressure gradient will continue to relax this afternoon as the cold front that moved through the region this morning moves farther to the south. High pressure will continue to build into the area tonight, resulting in temperatures falling into the 20s for the southwestern Panhandle and northwestern South Plains and low 30s elsewhere. Surface flow will remain mostly northerly through tomorrow morning, resulting in reinforcement of cold air and highs only increasing into the low 50s on the Caprock and upper 50s to near 60s off the Caprock. GKendrick A low amplitude progressive upper level ridge will shift ESE tomorrow, followed by zonal flow through through the weekend. Upper level ridging across old Mexico will enhance the southern jet to our west and southwest.
500 PM CST Wed Nov 17 2021 A low pressure system spinning over southern Manitoba will slowly migrate into Ontario on towards Hudson Bay through tomorrow. Surface winds out of the northwest over the local region have ushered in cooler conditions.
/issued 305 PM CST Wed Nov 17 2021/ Strong southerly winds continue across the Mid-South this afternoon ahead of an approaching cold front. However portions of Northeast Arkansas and the Missouri Bootheel, remain in the upper 60s due to stratus streaming northeastward ahead of an approaching cold front. The cold front will move through the Mid-South tonight. Temperatures will be cooler with highs in the lower to mid 50s across much of the area.
COld front continues to approach the area from the west and will arrive tomorrow, bringing some showers and colder temperatures for the weekend.
553 PM CST Wed Nov 17 2021 (Thru Tonight) Strong cold front is sliding southeast across the region early this afternoon, stretching from far NW AR down into S central OK. Clearing skies by morning across far NE OK will likely result in freezing temps, but this area has already had a hard freeze so no headlines are planned.
Regional radars showed a narrow band of showers and thunderstorms along the cold front from central Arkansas back to the southwest across the ArkLaTex. The cold front along with the convection along it will move into the northwest portions of our CWA later tonight. Model consensus has the cold front just northwest of the Natchez Trace prior to sunrise. /22/ Prior discussion below: Tonight through Thursday: Most weather concerns in the near term will be associated with a cold front pushing southeast across the area. Otherwise, the cold front should move into northwest portions of the forecast area after midnight, accompanied by showers and perhaps a few lightning strikes initially. Temperatures will be notably cooler behind the front with gusty northwest wind combining to make for rather uncomfortable conditions. High pressure at the surface will move in behind the front, but only briefly.
Weak cold front to push down into the mid-state later tonight, then move over to the Plateau vicinity around sunrise. We can expect a few more hours of VFR wx before a cold front brings showers and low ceilings to Middle Tennessee overnight and on Thursday.
A band of showers will move across the area associated with a cold front. Chattanooga Airport, TN 65 35 54 34 58 / 80 0 0 0 0 Knoxville McGhee Tyson Airport, TN 65 32 51 31 56 / 90 10 0 0 0 Oak Ridge, TN 61 31 50 31 56 / 90 10 0 0 0 Tri Cities Airport, TN 65 29 48 27 55 / 90 40 0 0 0.
356 AM EST Thu Nov 18 2021 A cold front will return rain to the region today.
Strong cold advection kicks in thereafter, as skies ultimately clear with incoming high pressure.
1115 PM EST Wed Nov 17 2021 An approaching cold front will provide rain tonight along with much colder temperatures Thursday.
1147 PM CST Wed Nov 17 2021 A cold front continues to move through south Arkansas with showers and thunderstorms, and gusty winds. High pressure and dry air will move in behind the front. A surface cold front has entered northwest Arkansas and will sweep southeast through the overnight hours into early Thursday morning.
145 AM EST Thu Nov 18 2021 High pressure will be offshore today as a cold front approaches from the NW. The cold front will move through central NC tonight.
Clouds will increase further Thursday as a Pacific trough moves inland. Trough will begin light valley rain and mountain snow in eastern Oregon Thursday afternoon, but looks much wetter on the Idaho side Thursday night when the trough reaches there.
A cold front will move through the region Thursday afternoon, bringing with a chance for isolated to at times scattered showers during the day.
945 PM CST Wed Nov 17 2021 Cold front and showers producing moderate rain fall had moved into northeast AR at midevening, just north of Jonesboro at 945 PM. /issued 305 PM CST Wed Nov 17 2021/ Strong southerly winds continue across the Mid-South this afternoon ahead of an approaching cold front. However portions of Northeast Arkansas and the Missouri Bootheel, remain in the upper 60s due to stratus streaming northeastward ahead of an approaching cold front. The cold front will move through the Mid-South tonight. Temperatures will be cooler with highs in the lower to mid 50s across much of the area.
(Today and tonight) The center of the cooler and much drier air mass will pass west to east over Oklahoma today.
Weak cold front to push down into the mid-state later tonight, then move over to the Plateau vicinity around sunrise. Cold front is closing in on Middle Tennessee from the NW.
We opted to end the high wind warning at 6 PM CST, but did go with a wind advisory north central and across portions of the James River Valley for another few hours till 04Z (10 PM CST).
1258 AM EST Thu Nov 18 2021 A cold front will return rain to the region today.
(Today and tonight) Skies are beginning to clear across northeast Oklahoma, which should allow for temperatures to near or below freezing for most areas by sunrise.
Temperatures were mainly in the lower to middle 30s, with a few sites in the mid and upper 20s, and dew points were in the 20 to 25 degree range. Meanwhile, a disturbance aloft in the cyclonic flow around the departing low pressure moving NE of Ontario Canada will sweep across northern Iowa and northern Illinois.
Winds will remain gusty this afternoon and evening ahead of an approaching cold front currently stretched from Lake Michigan through St. Along and east of the I-75 corridor where we had more sunshine, temperatures were in the low 70s. As the cold front approaches, precipitation will start to increase and move into our far northwestern IN counties (Dubois, Orange, Washington) right around sunset then slowly push to the east- southeast overnight into tomorrow morning. Winds will remain gusty tonight, especially along and just ahead of the cold front. Rain will be on going for most of the area as we start the day tomorrow, with winds diminishing some behind the cold front. Upper level trough moves through central KY/southern IN during the day tomorrow.
1119 PM CST Wed Nov 17 2021 A potent closed upper low within a deep long wave trough is located across western Ontario late this afternoon. Portions of north central Nebraska could stay a few degrees warmer in the lower 20s where winds will stay up somewhat. The airmass remains dry Thursday as the Canadian airmass is recycled back northward as the high shifts east and southerly low-level flow develops by Thursday afternoon.
236 AM EST Thu Nov 18 2021 A cold front and its trailing precipitation continues to work east through the region. This will usher in cooler temperatures and limit high temperatures to the upper 40s for most.
257 AM EST Thu Nov 18 2021 Discussion/Marine - Upper Troughing and light Snow Showers Today Cold air and cyclonic flow with inversion heights into the DGZ about 5 to 10 kft AGL will mean snow showers today with amounts expected to be an inch or less as surface temperatures will be a bit above freezing in the mid 30s.
Clearing and turning colder tonight Discussion: An upper trough with its axis west of the Mississippi River will move across our area and will have its axis to our east by late in the period. At the surface, a cold front will push through our area today and then off to our east this afternoon.
330 AM EST Thu Nov 18 2021 An upper level trough will move into the eastern U. The highest rain chances are still expected to be from around the Interstate 4 corridor southward this afternoon and early tonight as the upper level energy moves across the area.
1038 PM CST Wed Nov 17 2021 Strong northwest winds will continue through the night but the higher gusts that are mixing down with diurnal heating will abate around sunset. The low level thermal field is a touch cooler than today so highs appear as though they will be about 3 to 6 degrees cooler. A ridge of high pressure will move in from the west so winds will diminish through the afternoon, especially west of I-29.
1137 PM CST Wed Nov 17 2021 A strong cold front extending from MI southwest through southeastern MO and northwestern AR will continue moving southeastward.
935 PM CST Wed Nov 17 2021 A low pressure system spinning over southern Manitoba will slowly migrate into Ontario on towards Hudson Bay through tomorrow. Surface winds out of the northwest over the local region have ushered in cooler conditions.
1052 PM CST Wed Nov 17 2021 (Tonight) Cold front has cleared the forecast area with any associated convection moving into central Arkansas. Otherwise high pressure will continue to build in from the north overnight with a gradual clearing trend, especially closer to morning across northeast OK. Going temperature forecast appears reasonable at this time, with areas along and near the KS/OK border dropping below freezing. Latest short range guidance continues to support this with freezing temps confined to areas that have already seen a hard freeze this fall.
/issued 945 PM CST Wed Nov 17 2021/ Cold front and showers producing moderate rain fall had moved into northeast AR at midevening, just north of Jonesboro at 945 PM. /issued 305 PM CST Wed Nov 17 2021/ Strong southerly winds continue across the Mid-South this afternoon ahead of an approaching cold front. However portions of Northeast Arkansas and the Missouri Bootheel, remain in the upper 60s due to stratus streaming northeastward ahead of an approaching cold front. The cold front will move through the Mid-South tonight. Temperatures will be cooler with highs in the lower to mid 50s across much of the area.
232 AM CST Thu Nov 18 2021 Stratus deck pivoting through the base of the upper level trough has pushed into portions of SW MN and the Hwy 14 corridor.
Heights begin to rise slightly today across northern Arizona as a weak ridge begins to build in the wake of the departing trough.
The tranquil weather pattern persists through the weekend with cooler temperatures, periods of breezy winds, and no precipitation. Lighter winds will be seen areawide Thursday as high pressure builds over the region.
Strong high pressure near NE New Mexico at sunrise will translate quickly eastward through Thursday, over western Oklahoma at midday, and near Oklahoma City by sunset. Dewpoints will remain low in the single digits and teens, and afternoon temperatures will struggle to get into the lower 50s despite full insolation.
(Tonight) Cold front has cleared the forecast area with any associated convection moving into central Arkansas. Otherwise high pressure will continue to build in from the north overnight with a gradual clearing trend, especially closer to morning across northeast OK. Going temperature forecast appears reasonable at this time, with areas along and near the KS/OK border dropping below freezing. Latest short range guidance continues to support this with freezing temps confined to areas that have already seen a hard freeze this fall.