Aikyam-Lab/Synoptic-Bench huggingface dataset:
Otherwise, dry and warmer with locally gusty northerly wind at times in the Central Valley. Current afternoon temperatures are generally 10 to 15 degrees warmer compared to 24 hours ago across the northern Sacramento Valley, while the Sacramento metro area is about the same. Threat of wrap around showers continues through Thursday as a slow moving upper low lingers over SoCal. Highs on Thursday will be 5 to 10 degrees cooler compared to today as downslope winds decrease.
659 PM EDT Wed Apr 8 2020 Another round of showers and a few storms are expected late tonight into Thursday morning with a cold frontal passage. Periodic showers and cooler weather are forecast through the end of the week. Another round of showers is expected to arrive after midnight, along with a crossing cold front.
A closed upper level low is spinning over central Saskatchewan/ Manitoba early this afternoon, creating a northwest flow aloft setup over North Dakota. At the surface, deepening high pressure over central Alberta is driving a strong pressure gradient force across the Northern Plains, resulting in windy conditions. A transitory ridge is forecast to pass through the Northern Plains Thursday night ahead of a clipper type system.
1034 PM EDT Wed Apr 8 2020 High pressure aloft and at the surface dominates our weather this evening. A 500 mb high over the northwest Caribbean comes with a flat ridge over the southern Gulf, with the 00z KEY sounding observing a 500 mb height of 5900 meters. With so much high pressure, the subsidence inversion in the evening sounding was near an uncommonly low 1,300 feet MSL.
A low pressure system will pass through southern California and Nevada over the next couple days.
A cold front will move across the region in the morning which will shift the wind to the east for much of the day, but speeds will stay under 12 knots. A cold front will drop south through the area tonight however the only real affect will be a slight cool down tomorrow afternoon (highs in the low to mid 70's) and a wind shift to more easterly winds early in the day. There may be some low clouds develop around sunrise however very dry near surface air should prevent fog development on the backside of the cold front.
Upper level ridging will remain the dominant weather feature across Western Washington over the next few days, keeping the region dry.
Strongest boundary layer cold advection behind a cold front is over the southeast Nebraska and northeast Kansas area this afternoon and closer toe DDC, a broad area of 20 to 25 knot winds at 850MB are found area wide. 500 mb low rotating of the southern CA coast is still forecast to reach the southern and central high plains as an open trough by the end of the weekend, followed by a surge of very cold (relatively) air surging equatorward.
A cold front will push south across the Big Country overnight, reaching KABI by 09Z. A surface cold front is still on track to move across the area late tonight and early Thursday. The front will usher in cooler temperatures and a chance for showers and a few thunderstorms during the day, as moisture is lifted atop the cooler airmass and lift increases with a weak disturbance lifting northeast from northern Mexico. It will be considerably cooler on Thursday, with temperatures by after falling in the upper 60s and lower 70s.
The pattern aloft reflected a cutoff low pressure system off the coast of southern CA and an upper trough/closed low over Saskatchewan/Manitoba and this low was translating southeast across the plains/Upper Midwest region. A cold frontal boundary associated with the northern system advanced south thru our region this morning, bringing a wind shift to the north/northwest with cooler air advecting south behind the boundary. Thursday will see a reinforcing shot of cold air backing into our region as energy translates across the upper Midwest region, deepening the upper trough to our east.
Very quiet period for the aviation community with high pressure in control.
526 PM EDT Wed Apr 8 2020 A strong cold front crosses tonight.
Brisk northwest flow aloft behind a cold front has produced breezy conditions across much of western SD this afternoon. As the front continues to push southward, pressure rises will cease and belt of strongest winds aloft will rotate eastward as upper trough pushes southeastward out of southern Saskatchewan and Manitoba.
722 PM EDT Wed Apr 8 2020 A cold front will move through with rain showers and a chance for thunderstorms this evening into the early overnight. Windy and much cooler conditions will follow later tonight into Thursday.
532 PM MDT Wed Apr 8 2020 The focus in the short term is on near critical fire weather conditions over the southwestern sections of the forecast area through the remainder of this afternoon along with cooler temperatures moving in late today behind a cold front. With relative humidity values hovering around 15 percent along with wind gusts approaching 25 mph as a cold front moves into the northern part of the forecast area, expect near critical fire weather conditions to remain in place through the remainder of today.
808 PM EDT Wed Apr 8 2020 Stacked high pressure over the region to keep warm and dry conditions overnight as westerly low level flow continues to increase dew points off the Gulf into the area. High pressure will maintain warm dry weather across the central and southern portions of the forecast area through Thursday, while a few isolated showers will be possible across the northern Nature coast on Thursday as a weak frontal boundary approaches from the north. Temperatures will remain above normal with lows tonight in the upper 60s to lower 70s with daytime highs on Thursday in the lower 80s along the coast, and mid to upper 80s inland.
Mainly zonal flow is expected aloft over the northern Gulf coast through the near term period as a northern stream trough progresses across the Great Lakes, Ohio Valley, and then over the northeastern CONUS. At the surface, high pressure over the northeastern Gulf of Mexico will begin to progress southeastward tonight as a cold front advances towards the region.
726 PM EDT Wed Apr 8 2020 A cold front will move through with rain showers and a chance for thunderstorms this evening into the early overnight. Windy and much cooler conditions will follow later tonight into Thursday.
Otherwise, the weak cold front will push through the area overnight, with much cooler lows for Thursday morning.
A low pressure system will bring cooler temperatures and chances for rain and high country snow showers tonight. A downturn in shower activity and warmer temperatures are forecast for most of the weekend.
With the HRRR lean, believe main squall line of showers and thunderstorms associated with strong surface cold frontal passage will form just northwest of and then move into Nashville Metro Area by around 1 AM CDT Thursday(09/06Z). It will quickly push southeastward and out of mid state region by around 4 AM CDT Thursday(09/09Z) as strong surface cold front exits mid state region.
359 AM CDT Thu Apr 9 2020 The upper low that has been off the coast of California has made its way over southern California. Meanwhile a deep and elongated trough will continue to slowly rotate southeast out of Canada through the Upper Mississippi Valley and Great Lakes Regions. The northern deep trough will force the California low to remain quasi-stationary through at least tomorrow night before beginning its pilgrimage east into the desert southwest.
256 AM CDT Thu Apr 9 2020 Early morning GOES-16 water vapor imagery showing a closed low over Ontario with troughing extending southward through the Upper Midwest/Upper Mississippi River Valley. Embedded and vigorous mid- level trough embedded within this flow was moving southeast from Manitoba into northern MN. That aforementioned vigorous mid-level trough will rotate across the area today. Showers are expected to diminish this evening along with skies clearing as cold Canadian high pressure builds in.
351 AM CDT Thu Apr 9 2020 Today will see a return to more seasonable temperatures following the passage of a cold front overnight. A light freeze will be possible tonight in the more sheltered valleys of northeast Oklahoma and northwest Arkansas, but most places will remain above freezing. The highest rain chances will remain across southern and eastern parts of the forecast area, but most rainfall amounts are expected to remain rather modest.
W-NW surface winds will prevail ahead a slow moving cold front that may eventually shift winds to N-NE the by 21Z at HOB/MAF.
208 AM EDT Thu Apr 9 2020 Windy and much cooler conditions are expected today.
CDG Chattanooga Airport, TN 69 42 60 38 67 / 0 0 0 10 10 Knoxville McGhee Tyson Airport, TN 65 40 57 36 65 / 0 10 0 0 10 Oak Ridge, TN 65 38 57 36 65 / 0 10 0 0 10 Tri Cities Airport, TN 62 35 53 32 62 / 10 10 10 0 10.
As a cold front passes over the area, clouds will be on the increase late in the afternoon. Mainly zonal flow is expected aloft over the northern Gulf coast through the near term period as a northern stream trough progresses across the Great Lakes, Ohio Valley, and then over the northeastern CONUS. At the surface, high pressure over the northeastern Gulf of Mexico will begin to progress southeastward tonight as a cold front advances towards the region.
The warmest locations will be south of the Ozark Plateau as downslope winds should push temperatures into the lower to middle 60s. The highest gusts will be across central Missouri.
1152 PM CDT Wed Apr 8 2020 MVFR/IFR cigs are expected to develop during the overnight hours this morning across portions of extreme Ern TX/N LA/Srn AR, near and ahead of a cold front which extends from Nrn and Wrn AR into SE OK to just N of the DFW Metroplex. This front will shift SE to near the I-20 corridor of E TX/N LA by 12Z Thursday, with the low cigs expected to gradually lift/scatter out with the fropa, as it reaches Cntrl LA and Deep E TX by mid to late morning.
1109 PM MDT Wed Apr 8 2020 The focus in the short term is on near critical fire weather conditions over the southwestern sections of the forecast area through the remainder of this afternoon along with cooler temperatures moving in late today behind a cold front. With relative humidity values hovering around 15 percent along with wind gusts approaching 25 mph as a cold front moves into the northern part of the forecast area, expect near critical fire weather conditions to remain in place through the remainder of today.
253 AM MDT Thu Apr 9 2020 High pressure will be over eastern Montana today with clear to partly cloudy skies and lighter winds.
As the cold front moves across the area today, increased winds behind the front has prompted a wind advisory for north and portions of central GA.
Near the surface, high pressure extends southeast from the high plains of eastern Montana into Nebraska and northern Kansas. Strongest boundary layer cold advection behind a cold front is over the southeast Nebraska and northeast Kansas area this afternoon and closer toe DDC, a broad area of 20 to 25 knot winds at 850MB are found area wide. 500 mb low rotating of the southern CA coast is still forecast to reach the southern and central high plains as an open trough by the end of the weekend, followed by a surge of very cold (relatively) air surging equatorward.
203 AM MDT Thu Apr 9 2020 Northern stream influence will grow in the period as a massive western NOAM ridge supports anomalously cold long trajectory longitudinal flow in center NOAM. Currently, backside departing impulse will support another round of pressure rises across the region behind a secondary trough, which will progress dry locally.
This was the convection previously noted that would develop into a squall line of showers and thunderstorms that would move through mid state region in association with strong cold frontal passage, specifically through the Nashville Metro Area, around 1 AM CDT Thursday morning, i.
Relatively dry conditions are likely today and tonight as weak ridging aloft holds steady across the Southern Rockies into the South Plains of west Texas. Cooler air spreading southward across the high plains of western Kansas will result in more seasonal temperatures today.
1148 PM CDT Wed Apr 8 2020 Satellite and radar show surge of cooler air and associated clouds and snow showers moving into northern North Dakota at this time. Also winds likely to pick up a bit again as the cooler air arrives. A closed upper level low is spinning over central Saskatchewan/ Manitoba early this afternoon, creating a northwest flow aloft setup over North Dakota. At the surface, deepening high pressure over central Alberta is driving a strong pressure gradient force across the Northern Plains, resulting in windy conditions. A transitory ridge is forecast to pass through the Northern Plains Thursday night ahead of a clipper type system.
The low pressure system over the southern California coast will advance into extreme southern Nevada Thursday. Somewhat cooler and wet conditions will impact much of Utah through midweek, with drier conditions returning late in the week.
An upper level disturbance and approaching cold front will provide good chances for SHRAs and TSRAs Thu afternoon and early evening.
Relatively dry conditions are likely today and tonight as weak ridging aloft holds steady across the Southern Rockies into the South Plains of west Texas. Cooler air spreading southward across the high plains of western Kansas will result in more seasonal temperatures today. 500 mb low rotating of the southern CA coast is still forecast to reach the southern and central high plains as an open trough by the end of the weekend, followed by a surge of very cold (relatively) air surging equatorward.
313 AM CDT Thu Apr 9 2020 High pressure currently centered over eastern Montana will gradually slide southeastward today, becoming centered over the Central Plains this afternoon.
1215 AM EDT Thu Apr 9 2020 Another round of showers and a few storms are expected late tonight into Thursday morning with a cold frontal passage. Periodic showers and cooler weather are forecast through the end of the week. A narrow ridge of warm, moist boundary layer air is surging immediately in front of this line, with various ASOS recording 5-10 degree Td jumps prior to the leading convective edge. Quasi-discrete cells are developing on the nose of the higher theta-e air. Another round of showers is expected to arrive after midnight, along with a crossing cold front.
408 AM EDT Thu Apr 9 2020 High pressure will continue to ridge across south FL today keeping warm conditions in place. Highs today will be in the 80s with lows in the mid 60s north to the lower 70s elsewhere.
This feature is rotating around the main upper low centered over Ontario, and will help push a reinforcing cold front through the area today.
A cold front will move through late tonight into tomorrow, turning winds to the north across the area. A cold front will push south across the Big Country overnight, reaching KABI by 09Z. A surface cold front is still on track to move across the area late tonight and early Thursday. The front will usher in cooler temperatures and a chance for showers and a few thunderstorms during the day, as moisture is lifted atop the cooler airmass and lift increases with a weak disturbance lifting northeast from northern Mexico. It will be considerably cooler on Thursday, with temperatures by after falling in the upper 60s and lower 70s.
Strong Gusty Winds and Cooler Temperatures Today. A tight pressure gradient will result in strong NW winds today with gusts up to 30-35 mph likely as cooler air spreads across the region. Decreasing 1000-850 hPa thickness values suggest max temps today will only reach into the mid to upper 50s for most, with Louisville and southern KY slipping into the low 60s.
133 AM CDT Thu Apr 9 2020 The pattern aloft reflected a cutoff low pressure system off the coast of southern CA and an upper trough/closed low over Saskatchewan/Manitoba and this low was translating southeast across the plains/Upper Midwest region. A cold frontal boundary associated with the northern system advanced south thru our region this morning, bringing a wind shift to the north/northwest with cooler air advecting south behind the boundary. Thursday will see a reinforcing shot of cold air backing into our region as energy translates across the upper Midwest region, deepening the upper trough to our east.
336 AM CDT Thu Apr 9 2020 Current satellite analysis depicts a mid to upper level low spinning over southern California. Over the Gulf of Mexico, high pressure extends up over the FA.
Key West radar imagery shows large amounts of anomalous propagation across the region, a result of super refraction and subsequent ducting of the radar beam as it comes in contact with the low base of the inversion. By tomorrow evening a weak trough/remnant cold front will swing through South Florida, shifting winds briefly to the north and increasing the depth of low-level moisture, but ultimately failing to bring meaningful changes to sensible weather conditions in the Keys.
839 PM PDT Wed Apr 8 2020 High pressure ridge over Pacific Northwest will continue to bring a mainly clear sky and pleasant weather for the next couple of days. High pressure in place for the next few days will bring quiet weather and VFR conditions. Very quiet period for the aviation community with high pressure in control.
224 AM CDT Thu Apr 9 2020 Cold front currently pushing through the mid state this morning. Otw, clearing and cooler conditions are on the way for today. High temps will top out in the lower to mid 60s with a moderate nw breeze.
TFJ High pressure will be over eastern Montana today with clear to partly cloudy skies and lighter winds. The high moves to the east tonight and a cold front drops south during the day on Friday with a chance of rain showers.
Otherwise, dry and warmer with locally gusty northerly wind at times in the Central Valley. Threat of wrap-around showers continues today and tonight as the slow moving upper level low continues to linger over SoCal. Elsewhere, dry weather continues, though increased cloud cover and a shift to southerly winds will keep temperatures cooler than yesterday. Shower activity tapers off Friday as upper ridging increases over NorCal. Valley highs will reach the low to mid 70s by Friday, followed by low 70s to low 80s over the weekend.
Much warmer than normal conditions are expected today as temperatures peak for the week in most areas. This is occurring as an upper level ridge axis noses into the region and a thermal trough at the surface pushes inland. Temperatures will trend cooler Friday as the air mass cools in response to approaching upper level trough to our north.
Otherwise, no major changes needed to Early this morning, colder air continues to flow into central Indiana behind an exiting cold front. There looks to be enough forcing for some slight chance to chance category PoPs most areas this afternoon, with the highest PoPs northeast closer to better forcing. The bottom of the mixing layer should produce gusts near 40 mph, with the highest gusts across the northern half of the area. Sunshine today should boost temperatures to a little warmer than the NBM for highs. The upper trough will still be providing enough forcing for some low PoPs in the early to middle evening. Temperatures will get to freezing across the northern forecast area with just above freezing south. High pressure will provide dry conditions Friday and Friday night.
Friday will be the mildest day through the period with temperatures climbing to near average as a transitory ridge quickly zips through. A cold front starts to settle into the area in the afternoon, possibly bringing a little light precipitation to the far northwest. Cooler air continues to pour into the area.
Showers and a few thunderstorms return to the forecast this afternoon as a cold front now draped across central Arkansas and north Texas slides south into the area.
/Issued 336 AM CDT Thu Apr 9 2020/ Current satellite analysis depicts a mid to upper level low spinning over southern California. Over the Gulf of Mexico, high pressure extends up over the FA. For the northern FA, looking at highs in the upper 60's, while in the southern FA highs look to be in the low 60's.
Cool front expected to reach AEX after 14z this morning, with the stronger cold front moving through this evening by 02-03z. Showers and thunderstorms likely this evening just ahead, along, and behind the cold front, with the best chances of TSRA from 03-07z. Showers and a few thunderstorms return to the forecast this afternoon as a cold front now draped across central Arkansas and north Texas slides south into the area.
Much warmer than normal conditions are expected today as temperatures peak for the week in most areas. This is occurring as an upper level ridge axis noses into the region and a thermal trough at the surface pushes inland. In typical fashion, sharply cooler temperatures and a return of marine stratus to the coast and coastal valleys (and likely Umpqua Basin too) are expected tonight into Friday morning in response to the aforementioned inland push of the thermal trough. Temperatures will trend cooler over the rest of the CWA too on Friday as the air mass cools in response to approaching upper level trough to our north.
Additional moisture associated with a cold front approaching later tonight into Friday will lead to additional MVFR/IFR Cigs after 06Z tonight. /issued 408 AM EDT Thu Apr 9 2020/ High pressure will continue to ridge across south FL today keeping warm conditions in place. Highs today will be in the 80s with lows in the mid 60s north to the lower 70s elsewhere.
431 AM CDT Thu Apr 9 2020 (Today and Tonight) A cold front is edging its way southward into our northern counties this morning, with north/northeast winds now Haskell, Throckmorton, and Stamford. This front will result in much cooler temperatures, and a chance for precipitation. Highs in the Big Country are expected to be in the upper 60s, with highs as warm as the lower 80s along the I-10 corridor. South and east of a Brownwood to Eden to Sonora line, low level instability will still be available ahead of the cold front, and so this area should see stronger/more numerous thunderstorms. For tonight, quiet weather with cooler temperatures, and lows mainly in the 50s.
Normal temperatures range from the low to mid-60s for highs and the low to mid-30s for lows. The forecast period starts with northwest flow aloft over the Central High Plains and an upper low over Southern California. High pressure sliding into the eastern part of the state may bring a little moisture into the region on the back side of it.
As the cold front moves across the area today, increased winds behind the front has prompted a wind advisory for north and portions of central GA. BDL Models have come into pretty good agreement on the timing of the next significant trough out of the southwest.
Cold tonight with temperatures below freezing in the upper 20s to near 30. Friday will continue to be clear and cool with frost and freeze concerns as morning temperatures drop near or below freezing.
(Today and tonight) The cold front that passed through our area is currently south of the Red River, though overnight temperatures have been slow to cool. Cooler temperatures in the 50's have settled into portions of northern and western OK.
High pressure currently centered over eastern Montana will gradually slide southeastward today, becoming centered over the Central Plains this afternoon. The high will be the dominant feature over the area this afternoon and tonight, then gets pushed southward on Friday as a cold front reaches the western part of the state. Below normal temperatures can be expected today and tonight, with highs today in the lower to mid 40s and lows tonight in the 20s.
Carrothers Dry weather will prevail over the area today into Friday with high pressure over the region. High temperatures will range from around 60 degrees in the west to the lower 40s near the Dakotas border today. Downslope conditions out ahead of an approaching cold front on Friday will allow temperatures to warm into the 60s for many places.