Aikyam-Lab/Synoptic-Bench huggingface dataset:
A low pressure trough moving across the area this morning will push east of the nearshore areas by early afternoon. The stratus will however begin to clear from late afternoon into the evening after the passage of a cold front. The cold front will move across srn WI from the late morning into the afternoon but the stronger cold advection will occur tonight. The cold front is associated with cyclogenesis that is occurring from western Ontario, Canada to srn Hudson Bay, Canada. Polar high pressure will build into MN by Mon AM with lows Mon AM mainly in the 20s.
423 AM CST Sun Nov 5 2017 Backdoor cold front expected to move through northeast half of forecast area today.
A cold front will drop south tonight. Even with this high moisture. A cold front will be dropping south into the state late this afternoon. Temps across the CWA will be in more contrast from north to south for Mon as NRLY flow behind the front will keep temps much cooler.
609 AM EST Sun Nov 5 2017 A pressure ridge will be in the forecast area through Monday.
Light south winds prevailed in the lower levels with west to west-northwest flow dominating throughout the mid and upper levels. Synoptically speaking, a ridge of high pressure was centered over the states of Tamaulispas and Zacatecas in Mexico is impacting much of the western and northern Gulf of Mexico.
The cold front will move winds to the north by 15Z for KGUY and by 05Z for KDHT. /Issued 423 AM CST Sun Nov 5 2017/ Backdoor cold front expected to move through northeast half of forecast area today.
649 AM EST Sun Nov 5 2017 A stalled warm front over the area this morning was responsible for areas of dense fog and drizzle. Low pressure and an associated cold front, will move through the region today and early tonight bringing showers and thunderstorms to the entire area. Highs today will range from near 55 near Lake Michigan to the lower 70s near Lima. Issued a dense fog advisory earlier for areas northwest of the initial warm front. Upper level support in the left exit region of a 110 knot upper level jet will translate over the existing warm front and provide plenty of lift for storms. Given the proximity of the front, low LCLs and the high amount of shear, tornadic potential is certainly possible.
Templer Previous discussion: An upper trough extends from the BC/WA coast to Northern Alberta early this morning. The base of this trough will move inland across the Pacific NW today. Moisture ahead of this trough will move across the southern half of Montana tonight. The east-west oriented upper trough axis south moves through Montana on Monday and pushes the moisture to the south ending snow chances by mid day over the forecast area. High pressure will build into the area in the afternoon with well below normal temperatures continuing. NW flow aloft will prevail Monday Night as the trough axis moves to the southeast.
The next upper trough is poised to our northwest and will spread showers across the north this morning. A weak cold front accompanying the trough will move through the area tonight. The upper trough will remain over the region for a chance of snow showers, mainly over the higher terrain.
948 AM EST Sun Nov 5 2017 An area of low pressure and associated cold front will approach the area today. The cold front will move through this evening into tonight. Cooler air will begin to filter into the region with the passage of the cold front. Temperatures will struggle to rise with high temperatures in the lower 50s to lower 60s across most locations. A wave of low pressure will travel along the old frontal boundary that will extend across southern Kentucky.
617 AM EST Sun Nov 5 2017 High pressure will build in from the north today.
557 AM CST Sun Nov 5 2017 Patchy dense fog will prevail ahead of the cold front early this morning, mainly along/east of the Kansas turnpike. A brief period of drizzle and fog may also transition south with the front across the rest of the area this morning before the gusty north winds and cooler air begin to advect south in the wake of the front.
1036 AM EDT Thu Aug 31 2017 A deep mean layer anticyclone centered north of the Bahamas has moved very little over the past 24 hours. The regional 12Z RAOB analyses indicate rising heights from 925 through 700 mb across the state of Florida, indicating the low level ridge has nudged westward.
1018 AM MDT Thu Aug 31 2017 Current satellite imagery shows the upper trough moving into western Utah pushing increasing moisture into WY and CO. This will help to spark some storms over the higher terrain and Front Range by the afternoon. Expect the main trough to move through during the overnight hours that will bring showers to the plains. On Friday, the flow aloft will be northwesterly following the passage of a weak trough that will have shifted to the north and east of the state in the morning. An associated cold front will push across the Denver area around 18z. Over the weekend, it will become increasingly warm and stable in the mid levels as a ridge of high pressure builds over the western U.
High temperatures this afternoon are forecast to be near seasonal normals east of Tucson, and about 2-6 degrees warmer than normal from Tucson westward into the western deserts.
638 AM CDT Thu Aug 31 2017 The amplified ridge over the west will begin to break down today and tonight as a strong upper disturbance moves across northern Canada. Energy associated with this disturbance will act to break down the ridge bringing a short wave into the Plains states. This trough will be approaching the region Friday morning. As the upper trough approaches and lee troughing at the surface deepens southerly winds will be somewhat stronger than the previous few days. Highs on Friday are again expected to be in the low to mid 80s.
The low cloud bases over south central WI will gradually rise and begin to scatter out this afternoon. High pressure centered north of Lake Superior will settle across the Great Lakes later today and tonight.
The remnants of Harvey have taken on the appearance of a hybrid mid-latitude cyclone with a comma head appearance, dry slot, and preceding band of convection.
740 AM EDT Thu Aug 31 2017 A cold front will bring scattered showers and possibly a rumble of thunder today.
1022 AM EDT Thu Aug 31 2017 A cold front will bring scattered showers today.
Models seem to be in decent agreement with the timing and placement of the low center and back edge of precipitation which would be the portion that would affect the SGF CWA. to the lower and middle 80s. Behind the low, much drier air will begin to work into the region from the northeast during the afternoon and tonight.
6 inches, and warmer than normal temps aloft with ridge extending overhead. Another hot day in store with highs reaching the low 90s along the coast and mid 90s over the interior. (previous discussion) Bubble high over central FL will push into the W Atlc and merge with the Bermuda Ridge thru daybreak Thu.
625 AM CDT Thu Aug 31 2017 Surface map early this morning had a cold frontal boundary pushing southward into northern IL/central IA as high pressure was building in from Ontario Canada. For today, high pressure over southern Ontario will continue to pump in drier/cooler air into the area. Will keep the forecast dry for now given the high pushing lower dew point air in. High pressure maintains control across the area through Friday night. Highs Friday will be in the lower/middle 70s.
Moisture trapped under an area of high pressure overhead will lead to scattered showers and thunderstorms each day, with lower chances in the southern Great Basin over the weekend. The highest chances of storms this afternoon will exist across the Mojave National Preserve and southern Clark County this afternoon with more isolated chances elsewhere. Strong high pressure over the eastern Pacific was also clearly visible, and this will work its way into Oregon tomorrow, suppressing storms in the northern zones over the weekend but leaving the central and southern zones under easterly flow and open to moisture advecting in.
1142 AM EDT Thu Aug 31 2017 A strong cold front will sweep across the area today accompanied by scattered showers.
624 AM CDT Thu Aug 31 2017 High pressure will be east placing the region in southerly low level flow. Upper ridging will keep the region dry (until late tonight).
614 AM CDT Thu Aug 31 2017 An area of low pressure and upper level trough will approach the region today from the west. While the upper level trough and surface front will pass through the region tonight, several CAMS suggest pre-frontal storms developing in our western CWA later this afternoon.
An upper trough crossing the area will bring a cooler and more moist airmass to the area today. Drier air will quickly spread back into the area on Friday with warmer temperatures returning for the weekend.
611 AM CDT Thu Aug 31 2017 The upper level ridge across the Swrn U. A second area of showers of thunderstorms may fire off the Laramie Range this afternoon followed by a third area of thunderstorms associated with a upper level trof over Oregon. Given the weak focus at the lower levels, POPs are limited to 30 percent for this portion of the forecast. The upper level ridge will build back across the western US by Friday evening.
For this afternoon, as the low center moves into northwest AL, a large shield of rain and embedded thunder will spread across our southwest counties, and as far northeast as Nashville by 6 PM CDT. The increased shear, particularly at low levels, will bring the potential for very isolated tornadoes on the east side of the low, with the greatest risk over our southern counties late this afternoon and evening.
630 AM CDT Thu Aug 31 2017 A broad area of high pressure over northwest Ontario will gradually move towards eastern Ontario and lower Great Lakes as the work week comes to an end. Southerly flow develops at low/mid levels Friday as a warm front moves in from the west bringing a chance for rain showers late in the day. On the synoptic scale a broad mid-level ridge will track from the Rockies across the Great Plains today resulting in an area of high pressure over northwest Ontario to deepen. By Friday morning this warm front will stretch from the central Great Plains as far north as northern Ontario, moving east through the weekend towards the Upper Great Lakes. As the warm front approaches clouds will increase across the Northland during the day Friday with breezy southerly winds developing.
Thankfully this instability corridor fades out before the low level shear substantially increases. With models still showing 40-50 kts just off the surface, we'll have to monitor closely as the Low nears/deepens.
1049 AM EDT Thu Aug 31 2017 The low pressure associated with Harvey has moved to extreme NE Louisiana at mid morning.
South to Southwest steering will continue and increase through the short term period as Harvey tracks from the Deep South into the TN valley while High Pressure Ridge will remain across the Bahamas and Srn FL Peninsula. Plenty of sunshine to start the day should allow for Max Temps into the lower to middle 90s with heat Indices into the 100-105 range VFR today with low enough storm chances to keep just VCSH or VCTS at the TAF sites through the afternoon and evening hours.
928 AM EDT Thu Aug 31 2017 A cold front will move across our area this afternoon and early evening, then Canadian high pressure will build southeastward into our area Friday.
High pressure over the ern Great Lakes will continue to supply dry air on esely winds for the weekend and Mon. Forecast confidence is high: High pressure will be in control for most of the upcoming week.
1257 AM EDT Sun Sep 10 2017 An upper level low will slowly exit across the maritimes through Sunday.
Closed mid level low pressure was located over the northern plains today and is forecasted to slowly drift northeastward overnight. Forecast soundings indicate a deep layer of dry air in the lower levels which should inhibit precipitation from reaching the ground. Have kept the forecast dry for now given the low confidence any development. Not much change in the pattern so lows tonight will be in the lower 60s and highs tomorrow in the 80s. Little change in the sensible weather pattern is expected for much of the the upcoming week with the region remaining under the influence of a gradually eroding upper tropospheric longwave ridge over the Rockies.
This was due a high pressure dome over the Great Lakes and Hurricane Irma southeast.
Sprawling high pressure is found over the Great Lakes, with dry air continually being fueled into our CWA from the east. In any case, being on the back side of the high, we will keep a pressure gradient going through the night, and that should result in a 8 to 10 mph wind tonight, and again tomorrow. Overnight lows will be just a touch warmer than last night, with upper 40s northeast to mid 50s southwest.
/issued 342 PM CDT Sat Sep 9 2017/ (Tonight and Sunday) Upper level ridging will continue to dominate the weather across West Central Texas, with warm and dry conditions expected.
955 PM EDT Sat Sep 9 2017 An upper level low will slowly exit across the maritimes through Sunday.
703 PM EDT Sat Sep 9 2017 Cool and dry weather is expected this weekend under high pressure. With high pressure settling in overhead, and diurnal cumulus fading rapidly with sunset, a clear/calm night seems almost assured. With dewpoints falling into the lower 40s to mid 30s overnight, this will allow for a spot or two of frost being possible in the deepest valleys in Forest and Garrett County by morning. That said, the entire area will be a few degrees cooler than last night, which means we are set for our coldest night of the season to this point.
935 PM CDT Sat Sep 9 2017 Surface and upper-level ridge across the region continuing to maintain early autumn conditions areawide. Low-level moisture has been gradually increasing across the region which will allow for slightly warmer overnight low temperatures around 60. As a result, min temps tonight should moderate slightly from what was observed this morning, with max temps Sunday similar if not a tad warmer than what has been observed thus far this afternoon.
A weak cold front will spread light rain across the south Washington and north Oregon Cascades tonight.
VFR will continue through the next 24 hours with high pressure centered over the Great Lakes and extending down into TN.
749 PM EDT Sat Sep 9 2017 High pressure will dominate through the weekend. High pressure will remain anchored over the eastern Great Lakes to bring limited, if any cloud cover across the area through Sunday.
958 PM EDT Sat Sep 9 2017 High pressure over the central Great Lakes and northern Ohio Valley will remain in place through the weekend.
859 PM EDT Sat Sep 9 2017 Cool and dry weather is expected this weekend under high pressure. With high pressure settling in overhead, and diurnal cumulus fading rapidly with sunset, a clear/calm night seems almost assured. With dewpoints falling into the lower 40s to mid 30s overnight, this will allow for a spot or two of frost being possible in the deepest valleys in Forest and Garrett County by morning. That said, the entire area will be a few degrees cooler than last night, which means we are set for our coldest night of the season to this point.
Surface map at 18Z shows a ridge of high pressure situated to our north and west, where it has remained largely unmoved for the past couple of days. Today, though, we are once again enjoying benign weather, with temperatures a little warmer than yesterday and still no rain and only a few clouds.
Low pressure well offshore of SoCal was taking the best forcing for thunderstorm development farther southwest than expected earlier.
1035 PM EDT Sat Sep 9 2017 High pressure over the Upper Great Lakes will continue to build southeast across our region during the course of the weekend. This will allow for notably improved weather, and eventually warmer temperatures.
955 PM EDT Sat Sep 9 2017 Unseasonably strong high pressure will extend into North Carolina from the north through Sunday night.
731 PM EDT Sat Sep 9 2017 High pressure over the Great Lakes will stay in control of the weather into Sunday. With the clear skies and lingering lighter winds as high deptarts, interior areas of central and east may see lows in the low 30s tonight but readings in the 20s/30s will not be as widespread as occurred last night. Warming trend continues on Sunday as south winds increase with the high center moving to the lower Great Lakes.
928 PM EDT Sat Sep 9 2017 High pressure centered across the northern lakes with clear skies and light winds. the large upper level ridge (590 mb) will continue to build over the region. A little warmer Sunday with highs in the upper 60s to around 70. Pattern Forecast: Broad ridging encompasses the nation's midsection and northeastward into northern Ontario. though a bit "dirty" with a couple of short wave troughs within and dropping down the front side of the ridge over the Dakotas and lower Mississippi Valley. Long wave trough over the eastern Pacific with a couple of embedded short wave troughs along the west coast of North America. nice pocket of dry air associated with this low over the upper Great Lakes (12z precipitable water values at APX/DTX below 50 percent of normal).
Surface and mid-level high pressure will prevail at the aerodromes, producing VFR conditions. The drying trend will continue Sunday and Sunday night with mid level ridging aloft and high pressure in control over Texas and the northwest Gulf, even as Hurricane Irma to the east begins to subtly tighten the surface pressure gradient.
/issued 935 PM CDT Sat Sep 9 2017/ Surface and upper-level ridge across the region continuing to maintain early autumn conditions areawide. Low-level moisture has been gradually increasing across the region which will allow for slightly warmer overnight low temperatures around 60. As a result, min temps tonight should moderate slightly from what was observed this morning, with max temps Sunday similar if not a tad warmer than what has been observed thus far this afternoon.
707 PM EDT Sat Sep 9 2017 An upper level low will slowly exit across the maritimes tonight through Sunday.
821 PM EDT Sat Sep 9 2017 Unseasonably strong high pressure will extend into North Carolina from the north through Sunday night.
1000 PM EDT Sat Sep 9 2017 High pressure with dry and cool weather dominates remainder of the weekend. Strong Canadian high pressure will continue to feed cool and dry air on northeast breezes through Sunday. High pressure will relinquish its grip on the region in response to the north northwestward push of Irma towards the Tennessee Valley. With the track of Irma forecast a bit further to the west, then curling southwestward into the lower Mississippi Valley, wind and rain effects here are getting slightly downplayed from previous days for our area.
748 PM EDT Sat Sep 9 2017 High pressure will dominate through the weekend. High pressure will remain anchored over the eastern Great Lakes to bring limited, if any cloud cover across the area through Sunday.
1152 PM CDT Sat Sep 9 2017 High pressure is mainly in control over the region through Sunday afternoon. A high pressure system which is currently located the Great Lakes region will slowly drift southeast tonight into Sunday. The western periphery of the high pressure will be over the Mid Mississippi valley and produce light east to southeast winds and drier air across the area on Sunday. These easterly winds will keep temperatures a couple of degrees cooler on Sunday.
606 PM CDT Sat Sep 9 2017 An upper level low across South Dakota is clearly visibly in water vapor imagery this afternoon. Forcing from this low has helped to sustain a line of showers and isolated thunderstorms across the local area this afternoon despite the limited instability to work with. expect clearing skies and a rebound in temperatures across the local area as cloudy skies and showers have kept most locations cooler than previously forecast this afternoon. High pressure will remain over the center of the country to start the extended periods as an upper level low spins off the coast of California and the remnants of hurricane Irma track into the southeastern US.
100 AM EDT Sun Sep 10 2017 High pressure will dominate through the weekend. High pressure will remain anchored over the eastern Great Lakes to bring limited, if any cloud cover across the area through Sunday.
720 PM EDT Sat Sep 9 2017 High pressure with dry and cool weather dominates remainder of the weekend. Strong Canadian high pressure will continue to feed cool and dry air on northeast breezes through Sunday. High pressure will relinquish its grip on the region in response to the north northwestward push of Irma towards the Tennessee Valley. With the track of Irma forecast a bit further to the west, then curling southwestward into the lower Mississippi Valley, wind and rain effects here are getting slightly downplayed from previous days for our area.
There is a regional scale anticyclone situated near 28N 68W. These two features will be paramount players in steering the Hurricane from ambling slowly west northwest attm, to just west of due north and north where it will impact the Lower Florida Keys and Southwest Florida Coast in the next two days. A weak frontal system extends from low pressure off of New England south to off of the Low Country of South Carolina. It is expected to move more just west of due north by late tonight or Sunday morning when the core of this storm passes near or across the Lower Florida Keys.
1256 AM EDT Sun Sep 10 2017 High pressure over the Great Lakes will stay in control of the weather into Sunday. With the clear skies and lingering lighter winds as high deptarts, interior areas of central and east may see lows in the low 30s tonight but readings in the 20s/30s will not be as widespread as occurred last night. Warming trend continues on Sunday as south winds increase with the high center moving to the lower Great Lakes.
503 PM MDT Sat Sep 9 2017 Latest upper analysis showed troughs over the east and west coasts with a ridge over the central CONUS. At the surface a trough was becoming better defined over MT/WY and the western Dakotas with high pressure centered over the Great Lakes region. Diurnal heating and the low level moisture have combined to push the MLCAPE to 500-1000J/KG over parts of western and central South Dakota this afternoon, however is appears that the CIN is strong enough to keep convection from developing over the forecast area this afternoon and evening. On Sunday, the upper ridge will rebuild over the region. High temperatures will be around 10 degrees warmer than average.
802 PM EDT Sat Sep 9 2017 High pressure over the Upper Great Lakes will continue to build southeast across our region during the course of the weekend. This will allow for notably improved weather, and eventually warmer temperatures.
Low pressure will develop off the Southern California Coast through Sunday, then lift slowly north through midweek. The low will increase moisture and the chance of showers and thunderstorms over the region through Sunday.
652 PM CDT Sat Sep 9 2017 Expansive high pressure area over the Great Lakes will keep us quiet for the rest of the weekend.
903 PM CDT Sat Sep 9 2017 Weak and stacked upper level low sitting over NE SD this evening still kicking off a few showers in the far east. This low will not move much overnight. An upper level trough currently over the region will slowly push eastward tonight through Sunday morning. The upper level trough will be located over western MN by 18Z Sunday with dry and warm conditions over the CWA. Most of the extended looks warm and dry with an upper ridge in place.