Aikyam-Lab/Synoptic-Bench huggingface dataset:
As the low pulls away and the lower atmosphere begins to decouple winds will drop off onshore thus the Wind Advisories have been allowed to expire.
/issued 901 PM CDT Mon Mar 12 2018/ High pressure building into the region will keep skies mostly clear and winds light overnight. The combination of clear skies and light winds will be supportive of radiative cooling during the overnight hours while the high pressure is over the region.
618 PM CDT Mon Mar 12 2018 Large scale trough over the Great Lakes region is producing northwest flow over central IL with a series of embedded weak disturbances bringing a threat of flurries and sprinkles over the upcoming day.
945 PM CDT Mon Mar 12 2018 Light winds and clear skies will let temperatures fall just below freezing most areas north of the Red River.
/issued 945 PM CDT Mon Mar 12 2018/ Light winds and clear skies will let temperatures fall just below freezing most areas north of the Red River.
High pressure will build over the area through Tuesday. Mid level ridging extending from the eastern Great Basin northward into the central Rockies is resulting in a tranquil evening downstream across the forecast area. This ridge is forecast to slowly translate eastward, becoming centered across the forecast area during the day Tuesday.
A calm to very light north breeze should allow early Tuesday morning temperatures to fall into the lower to middle 40s inland (5 to 10 degrees below normal) / middle 50s along the immediate coast.
A quick aftn update was issued to include a flurry mention this for most zones given radar returns with the encroachment of cold upper low pressure. Will keep PoPs in the high chance range, but everyone should see flakes at some point during the day.
00 UTC surface analysis shows an area of high pressure still well back to the NW of the region across NW Arkansas.
Still expecting some lake effect snow, just delayed the timing a bit, with the best chance still looking to be overnight when moisture in the low levels improves. Despite the high currently situated over southwest Manitoba Canada, it will be a very slow moving high and is not expected to pass by to our southwest until Tuesday afternoon. This is one solution from the suite of deterministic models trying to forecast what happens with a deep long wave trough moving into the PacNW, so some caution is exercised in any solution regarding this feature. The forecast leading up to this system is largely dry and warmer.
909 PM EDT Mon Mar 12 2018 A colder and much drier airmass will continue to build into the area in the elevated low level N/NW flow behind the strong cold front that is now south of Florida. Clear skies expected overnight with temperatures becoming quite chilly, with lows in the low to mid 40s forecast over much of the region. West-northwest winds up to 20-25 knots will continue over the waters behind the strong cold front, decreasing to 15 to 20 knots late tonight as they veer to the north-northwest.
Weak ridging currently in place will give way to more of a zonal flow pattern over the Southern Plains by early in the week, allowing temperatures to increase a bit to start the work week.
While cloud cover will persist through tonight for roughly the western half of west central Texas, the lower (MVFR to IFR) ceilings should be confined to Crockett and Irion Counties, staying west of KSJT and KSOA.
Sunday the clouds and precipitation will counteract the strong warm air advection going on, though mainly over Minnesota, with warmer temperatures expected over northwest Wisconsin.
Southwest flow aloft has developed and anticipate several upper waves ejecting into the region from the mean west coast trough. The upper level low may be displaced too far west from this front for cold core tornado potential, but not out of the question.
Stratocumulus across the region today is expected to slowly dissipate tonight as ridging builds aloft with subsidence and dry advection increasing. helping to alleviate the low level unstable flow across Lake Ontario. A few spots could touch freezing in the normally cold spots, but a widespread freeze is not anticipated as there will be some warming of the atmosphere going on aloft around 850 mb. High pressure in control. High pressure remains in control through Sunday night with clear skies and chilly temperatures once again. There is some warming expected with the thermal ridge cresting overhead, thus temperatures should be a few degrees warmer than tonight.
A cold front will move into the forecast area behind the trough late tonight/early Sunday followed by gusty northwesterly winds. On Sunday, the western CONUS upper trough will continue to deepen as an upper low develops over MT. -SHRA possible with TS across the southern parts of the forecast area as the cold front moves through rest of CWA. Temperatures will vary greatly across the area on Sunday, from the mid 50s over parts of northeastern WY to the lower 70s over parts of south central South Dakota.
with low temperatures generally in the lower 60s. expect another breezy day across the local area as the surface pressure gradient will remain tight across the local area ahead of the deepening trough of low pressure to our west and cold front to the northwest of the local area. but for areas mainly west of the tri-cities and closer to the intersection of the cold front. While this potential is still on the low end.
/issued 231 PM CDT Sat Sep 30 2017/ High pressure located at the surface over the Great Lakes is building down into the forecast area providing dry and less humid conditions than the past few days. Meanwhile, water vapor imagery shows an upper level low over the Southeast Gulf of Mexico with somewhat of a surface wave/weak low over Central Florida. Meanwhile, the upper level low over the Southeast Gulf will move west-southwestward across the extreme Southern Gulf of Mexico. The surface wave/inverted trough over Central Florida will move westward between these two systems along the northern Gulf of Mexico and into Texas through mid-week. Moisture ahead of the surface wave/inverted trough will begin to move into eastern portions of the forecast area on late Sunday.
/Issued 345 PM EDT Sat Sep 30 2017/ Strong ridge of high pressure continues to build in from the NE and associated subsidence should eventually scatter out some of the lingering stratocu that came in with the easterly fetch off the Atlantic this morning. Still cannot rule out some stray showers for the southern tier of the CWA late afternoon/evening here, though much drier and abnormally cooler airmass should dominate majority of area.
Temperatures will likely be similar to last night's in most spots, and possibly a couple of degrees warmer than that at the typical cold spots. Weak ridging currently in place will give way to more of a zonal flow pattern over the Southern Plains by early in the week, allowing temperatures to increase a bit to start the work week.
Large area of strong high pressure and dry air thru the column remain centered over the Great Lakes region this afternoon. as afternoon temps peak in the low to mid 60s. Most inland locations across Northern Lower Michigan will see frost development again overnight as low temps drop into the low to mid 30s.
1056 PM EDT Sat Sep 30 2017 Low pressure departs as high pressure builds from the west tonight and Sunday. This high pressure over the northeast builds slowly east through the upcoming week, moving offshore by mid week as a cold front approaches from the west.
This evening will be the last "cool" evening with the cooler air over the eastern Ozarks tonight. Temperatures will be a degree or two warmer than today.
603 PM CDT Sat Sep 30 2017 Mostly sunny/clear skies this afternoon and evening will give way to increasing mid-high cloud cover overnight into Sunday as high pressure drifts eastward and a trough of low pressure enters the Dakotas. Southwest flow pattern will prevail through early week as a broad upper level ridge builds over the southeast US.
IFR cigs/vsbys in br to return to areas from the east slopes of the central mt chain across the ern plains by 02Z and persisting through 01/13Z when strengthening sw sfc winds start to erode the low clouds.
1146 PM CDT Sat Sep 30 2017 Mostly sunny/clear skies this afternoon and evening will give way to increasing mid-high cloud cover overnight into Sunday as high pressure drifts eastward and a trough of low pressure enters the Dakotas. Southwest flow pattern will prevail through early week as a broad upper level ridge builds over the southeast US.
The upper ridge is now well east of Iowa with southwest flow aloft. Lows tonight will be 5-10 degrees warmer than last night. /Sunday through Saturday/ We will remain in an unsettled pattern this week with the blocking pattern remaining. A stout upper ridge over the Eastern U. and a deep trough over the Rockies will cause very slow movement of features. The upper trough over the Rockies does appear to pivot some so pops were not completely removed but the amount of dry air in place does raise questions. In time as the ridge to the east tilts some causing the flow over the region to become more southwesterly and allowing the trough to the west to influence things over our area more.
940 PM EDT Sat Sep 30 2017 High pressure anchored over the region will sustain dry and stable conditions through the latter half of the weekend. As the ridge axis advances east of the region during the afternoon hours, high clouds will spread overhead.
High pressure centered over Lake Huron will shift to the eastern Great Lakes tonight and into Sunday. Low pressure is still well removed from the area, but will begin to organize in lee of the Rockies. Highs will bump up to the upper 60s far NE to the lower to maybe mid 70s in Lasalle/Livingston counties.
604 PM CDT Sat Sep 30 2017 High pressure dominates the weather map this afternoon as another mild day brings plenty of sunshine and seasonal temperatures to the Midwest. Upper level ridge stretches from the Great Lakes to the central Gulf Coast this afternoon and quiet and mild weather is expected to last through the overnight hours. Guidance has been consistently too high with overnight lows under the ridge, and although the cirrus may come in a little thicker. Winds should become more southeasterly after a somewhat variable evening under the ridge. Across the CONUS, a wave digs in over the western half of the country, amplifying the pattern considerably, and putting Central IL on the edge of the ridge.
Temps should be a bit cooler than last night. The pressure gradient has been compressed a bit by the strong high pressure system over Michigan. Upper level ridging will move east over the lower Ohio Valley tonight as well, with skies remaining clear. Typically cooler, low-lying areas will likely drop into the lower 40s. A low-level thickness increase would suggest a warmer afternoon tomorrow, but warming may be slightly offset by cirrus clouds streaming overhead.
903 PM CDT Sat Sep 30 2017 Light winds courtesy of surface ridging nosing into the state and clear skies will promote good radiational cooling tonight with hourly temperatures already falling faster than previously forecast. /ISSUED 345 PM CDT Sat Sep 30 2017/ Drier/slightly cooler air is expected to continue filtering down into SE TX this evening. POPS should be- gin tapering off on Weds as low-level moisture decreases and the upper ridge begins to build over the area. Drier and warmer con- ditions to prevail the rest of the week.
841 PM EDT Sat Sep 30 2017 Canadian high pressure will build into central NC from the north through Sunday, then linger overhead through mid-week. Canadian high pressure building into central NC tonight will maintain dry and seasonably cool conditions. If the wind stays up longer than expected, minimum temperatures may end up a couple of degrees warmer than forecast.
Flat upper level ridging will be situated across South Texas on Sunday, leading to quiet weather over the area.
Tonight through Sunday, An upper trough moving onshore across the western US will dig southeast into the southwestern US and will amplify.
The heaviest snowfall totals will fall in the Flat Tops and Park Range, where as much as 20 inches could be seen in the highest and most favored terrain.
1016 PM EDT Sat Sep 30 2017 A seasonably cooler and crisp autumn airmass will sweep across the area this weekend with the risk of frost in the Alleghenies Sunday morning.
We have a zonal westerly to southwesterly flow across our area, under a broad trough through western states.
The highest probabilities are expected to remain across our central Kansas counties although a slight chance for showers will extend to the state line across portions of south central Kansas.
Chattanooga Airport, TN 53 78 55 80 / 0 0 0 0 Knoxville McGhee Tyson Airport, TN 50 76 50 78 / 0 0 0 0 Oak Ridge, TN 50 76 50 78 / 0 0 0 0 Tri Cities Airport, TN 43 75 46 77 / 0 0 0 0.
We expect overnight lows to cool into the upper 50s to the lower 60s.
A weak Pacific cold front should press into Wrn Neb Sunday morning producing a partial clearing. Freezing levels are below 10kft agl supporting a hail threat. Still the NAM is backing the low level winds Sunday evening across Swrn Neb to produce 0-3km helicity around 600 m2/s2.
Slightly drier air and less cloud cover will push temperatures up a couple more degrees from today's highs into the low to mid 90s.
930 PM EDT Sat Sep 30 2017 Canadian high pressure will build into central NC from the north through Sunday, then linger overhead through mid-week. Lows ranging from mid 40s in the typically cooler locations to upper 40s/lower 50s elsewhere.
721 PM EDT Sat Sep 30 2017 A seasonably cooler and crisp autumn airmass will sweep across the area this weekend with the risk of frost in the Alleghenies Sunday morning.
High pressure moving slowly to the east of the area will continue to bring quiet weather into Sunday. High pressure will slowly move to the east of the area tonight and Sunday. The high will continue to bring quiet weather to the area during this time. Lows should drop into the lower to middle 40s over most of the area tonight, with upper 60s to around 70 for highs on Sunday.
730 PM EDT Sat Sep 30 2017 Canadian high pressure remains established over the region tonight into the middle of the upcoming workweek.
The region will be situated between high pressure to the east and low pressure to the west tonight, with a fairly tight pressure gradient likely keeping wind speeds in the 15 to 25 MPH range overnight. As the low and its associated frontal boundary reach the western part of the state late tonight, a 40-50 knot LLJ will aid in the development of precipitation, mainly across the central and eastern portions of the CWA.
These storms are expected to continue through the afternoon, but wane as diurnal heating ends at sunset and the trough axis pulls east- northeast.
Upper level trough and fairly strong short wave to move across the region tonight into Sunday. The upper level trough will then move southward across the area Sunday into Sunday night with additional showers.
/Issued 153 PM PDT Sat Sep 30 2017/ Seasonable temperatures will continue into Sunday, but it will become much colder behind a strong cold front Sunday night.
Temperatures are in the lower to mid 80s. An area of low pressure near the northeast coast of Florida will move to the west overnight.
915 PM EDT Sat Sep 30 2017 Low pressure off the New England coast that has been bringing cool and breezy weather will gradually pull away tonight. A large area of high pressure over the Great Lakes will move over the eastern U. Some patches of stratocumulus remain over eastern portions of the CWA, which could remain the case into the night as offshore low pressure makes little additional progress eastward. On the western ridges the winds will likely preclude it. The low off New England will weaken and elongate, pushing a weak low level trof south off the Mid Atlantic coast Sunday.
636 PM CDT Sat Sep 30 2017 /00Z TAFs/ No concerns the next 24-30 hours, as VFR will persist throughout with strong surface ridging continuing to advect dry air from the Ozarks and Tennessee Valley. We expect overnight lows to cool into the upper 50s to the lower 60s.
/issued 303 AM CST Thu Nov 25 2021/ Breezy post frontal northerly surface winds will begin to ease late this afternoon and evening as a sharp upper level trough shifts east and south of the region today and tonight. Cloud cover behind the front will be less than previously expected, especially at the lower levels, but the CAA associated with the northerly boundary layer winds persisting through much of the daytime hours will keep temperatures below normal, in the low to mid 50s. Surface ridging in the wake of the exiting trough will result in light and variable surface winds settling in after sunset, enhancing the radiational cooling effect that will drop overnight lows into the 20s across the region. Some locations, especially in our northwest zones that generally see even cooler temperatures under these circumstances may drop into the upper teens.
Much warmer air will be the theme for Friday, with a warm front crossing our area Thursday night into Friday. Highs will range from the low 40s east, to the mid 50s to near 60 degrees west of the Missouri River.
303 AM CST Thu Nov 25 2021 Breezy post frontal northerly surface winds will begin to ease late this afternoon and evening as a sharp upper level trough shifts east and south of the region today and tonight. Cloud cover behind the front will be less than previously expected, especially at the lower levels, but the CAA associated with the northerly boundary layer winds persisting through much of the daytime hours will keep temperatures below normal, in the low to mid 50s. Surface ridging in the wake of the exiting trough will result in light and variable surface winds settling in after sunset, enhancing the radiational cooling effect that will drop overnight lows into the 20s across the region. Some locations, especially in our northwest zones that generally see even cooler temperatures under these circumstances may drop into the upper teens.
- Cold Friday Morning, Lows will dip into the low to mid 20s for most, upper teens for north central Missouri. Winds will relax slightly through the daylight hours as broad high pressure continues to settle across the region. Lows will dip into the lower to mid 20s, to teens in north central Missouri.
Our warmest locations will be west of the Red River, where temperatures could reach the lower to middle 20s. Winds shift through the midday and afternoon hours, allowing warmer air to slowly work northward heading into the evening and overnight period. Friday will be significantly warmer, with upper 20s for highs near Lake of the Woods, and low 40s near Valley City. This warmup is in response to the approach of an H5 ridge building into the northern US Rockies, then slowly working eastward.
Dry conditions look to remain in place until a little after daybreak, where a line of showers accompanied with a cold front will begin to propagate E-SE through the region. By the late evening into the overnight hours, rain should be on its way out of the area with cooler air pooling in behind it. By tonight, overnight lows will drop to freezing for those along the Highway 82 corridor.
941 AM EST Thu Nov 25 2021 High pressure continuing over the local area will provide pleasant conditions for your Thanksgiving festivities. Winds may become light offshore/NW during the evening/overnight, as a weak cold front approaches the area.
Freezing fog will also be a factor in the Rogue valley. Increasing high clouds ahead of the weak atmospheric river flow will be a factor in burning off the fog with blocking of radiational heating. By Friday morning the weak upper ridge over the region this morning will transition to a zonal flow pattern ahead of the next front.
High level cloud cover was overspreading the area in advance of an upper trough and cold front. High pressure was located across the Carolinas and was keeping a dry and stable airmass in place over the TN valley. Wind gusting to 20-25kt is likely overnight, especially in the higher elevations.
553 AM CST Thu Nov 25 2021 (Today and tonight) Expect much cooler and breezy conditions today behind a cold front.
Dry and warmer as ridge begins to build overhead. Will begin to see an increase of high level moisture and cirrus clouds across northern Nevada tonight as ridge flattens slightly as trough begins to push into PacNW. This will likely allow for warmer nighttime temps with lows in the 20s to lower 30s. As the trough continues to pass to our north Friday, the ridge flattens a bit more and the flow aloft will become west to northwest. Warmer, especially central NV with less cloud cover, with highs in the upper 40s to 50s.
403 AM CST Thu Nov 25 2021 Showers and a few isolated thunderstorms are pushing into the forecast area this morning as a cold front will move through the Mid South.
Weak ridging/zonal flow will continue building in behind an exiting trough. The lowest part of the atmosphere will be quite dry however, which makes me favor virga over precipitation reaching the ground in most areas.
Lingering light lake effect snow showers early Friday will taper off as h8 temps moderate Friday and ridging moves in from the west.
Northwest flow following yesterday's cold front is currently leading to cold air advection across the CWA. Expect skies to clear this morning and remain mostly sunny throughout the rest of today as high pressure slowly propagates eastward. High temps today will be noticeably cooler, ranging from the mid teens in the Arrowhead and far northern MN to the mid 20s in north-central WI.
The rain will be associated with a surface cold front and mid level trof moving across the area today. High pressure will be the dominant feature tonight through Friday night.
(Today and tonight) Expect much cooler and breezy conditions today behind a cold front.
436 AM CST Thu Nov 25 2021 SHRA and some isolated TSRA are ongoing this morning as a cold front progresses SE through the state. This activity has been ongoing along and ahead of a cold front that is currently located from ERN OK into NWRN AR and SRN MO.
606 AM CST Thu Nov 25 2021 An upper level trof continues to move eastward into the the upper midwest. Winds will turn to the southwest and a warm front will push through western and southwest Nebraska Thursday, which will help keep temperatures a little warmer with highs in upper 40s to low 50s. As for Friday warmer air moves back into the area behind the front, pushing temperatures around 20 degrees or more above normal.
553 AM CST Thu Nov 25 2021 A strong cold front plowed south across the forecast area last night, with much colder air moving into the area. Expect minimal travel concerns for today, as a Canadian ridge of high pressure builds into the region, with temperatures slightly below seasonal normals.
Warmer again by this weekend as high pressure builds back in from the west. The trough over the desert southwest is filling in today with a remnant cut-off low sinking into Baja and Sonora. The low will shear back into higher latitude support east of our area over the weekend, with a ridge building back in from the west for us.
Local guidance indicates Harlowton and Big timber area likely to see winds gusting to near 60 mph especially as a window of better north to south pressure gradients as leeside troughing strengthens today. Otherwise broad ridging across the area will bring moderating temperatures and dry conditions through Friday.
405 AM CST Thu Nov 25 2021 An upper level trof continues to move eastward into the the upper midwest. Winds will turn to the southwest and a warm front will push through western and southwest Nebraska Thursday, which will help keep temperatures a little warmer with highs in upper 40s to low 50s. As for Friday warmer air moves back into the area behind the front, pushing temperatures around 20 degrees or more above normal.