Aikyam-Lab/Synoptic-Bench huggingface dataset:
1011 AM MST Fri Nov 19 2021 Quick update this morning to allow the High Wind Warning for eastern Platte County to expire on time. Current High Wind Warnings are looking on track based on observations, low and mid level gradients and 850/700 mb height differences between Craig and Casper, and with these height differences decreasing as the day progresses, the end times for the High Wind Warnings look decent. Maximum temperatures will be cooler in the wake of the associated cold frontal passage and with 700 mb temperatures near -7 Celsius. Definitely a colder night than the previous night in the wake of the cold front and with less cloud cover to insulate the atmosphere.
We are seeing temperatures return to the lower to mid 50s late this morning after starting off quite chilly across the region. /Today through Saturday/ A freeze warning continues for a few hours over our I-20 corridor and points north with 29 in DeQueen the coldest, in fact freezing there before midnight. And likewise lots of blue sky and with lighter NE winds and abundant sunshine, we will be a little warmer today. So we can expect near freezing readings to mid 30s tonight with a hearty frost once again.
Temperatures this weekend will be a little cooler than today but still 4-6 degrees above normal.
A sfc trof will eventually fragment through the evening and move east through the overnight period. The main impact from this is that the breezy southwesterly winds will eventually become light and variable as the trof moves east. Winds might take on more of a northwesterly to northerly direction in the wake of the fragmented sfc trof.
Will see warmer high temperatures on Saturday, around 5 degrees above normal.
Expect afternoon highs to top out in the low 50s as warm air moves in across the region. Breezy winds overnight will help to keep our lows a bit warmer than this morning.
236 PM CST Fri Nov 19 2021 A weak mid level trough currently over Washington/Oregon, will track eastward overnight and across the CWA during the morning hours on Saturday. The area will see increasing cloud cover this evening and through the overnight, which may keep low temperatures warmer, especially in central SD, where a few models suggest lows in the mid to upper 30s. Depending on model used, the mid level trough appears rather moisture starved, with maybe very light pcpn, or none at all occurring. A strong cold front will approach the CWA late Saturday night with increasing northwesterly winds expected.
341 PM EST Fri Nov 19 2021 High pressure will prevail through this weekend.
These winds helped temps warm quickly back above freezing this morning with temps in the mid to upper 40s common across the CWA. afternoon temps close to or slightly warmer compared to yesterday continue to look reasonable. The cloud cover and continued southerly winds overnight tonight will create warmer overnight temps with lows in the 30s to lower 40s possible.
Strong high pressure prevails across the ArkLaMis this morning and this will continue through the day. /15/ 12Z TAF discussion: VFR through the forecast as high pressure builds into the region. LLWS in the wake of the cold front this morning.
1046 AM EST Fri Nov 19 2021 High pressure returns today with cooler temperatures and dry conditions in place for the weekend.
Water vapor imagery displays a longwave trough extending from the off the Northeast coast to south Texas. High pressure is centered over the Ohio River Valley and is expected to continue to drive eastward tonight.
Saturday will be dry with moderating temperature as high pressure crosses. Large scale subsidence present in the mid-upper levels has reached the lower levels this early afternoon, and as wind backs and calms, clouds will decrease in coverage. As a result, well below normal temperature is expected for the remainder of the day and overnight, with some areas reaching the low 20s by Saturday morning. With brief high pressure and a return to zonal flow aloft, temperature will moderate this weekend with a shift in wind direction to the south as the nose of the subtropical jet approaches.
A weak inverted trough is situated along the Florida east coast and is expected to weaken today as a strong high pressure ridge builds over the eastern U. As the day progresses rain chances across the north will decrease to around 20 percent or below, with the highest rain chances this afternoon (PoP 50-70 percent) being along the coast and just offshore with the far souther Treasure Coast having the highest rain chances at 70 percent. Overnight lows will be in the low to mid 60s across the north, and mid to upper 60s across the south. A weak inverted trough is situated along the Florida east coast and is expected to weaken today as a strong high pressure ridge builds over the eastern U.
Showers will continue to taper off this morning across southwest Idaho, with another round of showers this afternoon and evening as a cold front sweeps across the region. Patchy fog may form across mountain valleys overnight as temperatures fall below or near freezing.
A deepening lee trough extended down the High Plains. South winds have picked up as the ridge slides east and should continue into tonight, along with passing high clouds.
(This afternoon through Saturday night) The arrival of high clouds and quick transition from cold easterly to warm southerly winds prevented freezing temperatures at KMAF. However, freezing temperatures were recorded at Lomax and Crane got as low as 33F. Therefore, dew points will begin to increase across the area preventing tonight's low temperatures from dropping into the low 30s. A lee side low east of the rockies will begin a southward trajectory, due to a cold front, and settle north of the CWA tomorrow.
Water vapor imagery shows a large longwave trough extending from Texas to the northeast that is slowly progressing eastward. The higher PoPs are located in the Upper Keys to account for any activity that may move off the mainland later today in the current north to northeast flow. A cold front will stall over central Florida this afternoon as high pressure builds eastward across the Appalachians. This high will bridge across the frontal boundary tonight, leading to freshening northeasterly breezes across the Keys coastal waters.
At the surface, unorganized area of low pressure from the Dakotas to the central High Plains was inducing gusty southernly winds over the region.
122 PM EST Fri Nov 19 2021 A relatively weak front will continue to sink slowly south over the region today and Saturday as high pressure builds in to our north.
Strong high pressure prevails across the ArkLaMis this morning and this will continue through the day.
238 PM EST Fri Nov 19 2021 Sprawling high pressure is anchored across the Ohio Valley. The high center will move east overnight and then offshore the Mid Atlantic late tomorrow afternoon or evening. (The growing season for Fannin, Towns, Union and White counties has ended previously due to sub freezing temps.
249 PM EST Fri Nov 19 2021 High pressure returns today with cooler temperatures and dry conditions in place for the weekend.
300 PM EST Fri Nov 19 2021 The fair weather pattern continues with high pressure now situated over the Ohio Valley and zonal flow aloft. So, temperatures overnight will be a tad warmer than last night, but still well below normal and bottoming out below the freezing mark. But, an influx of moisture ahead of the next upper trough will keep skies cloudy. The rain chances will return to central Indiana as H5 fall ahead of the next trough dropping into the Upper Midwest. Plus, a frontal system and associated cold front ahead of the trough will provide some additional forcing as moisture continues to ramp up over the area.
An approaching cold front will arrive late in the day on Saturday but not before seasonably mild temperatures are observed with most areas seeing highs in the upper 50s/around 60.
Despite the start of some WAA, temperatures were slightly below normal this afternoon, with readings in the low to middle 30s. Overnight temps will be in the mid to upper 20s west of the Fox Valley, and in the lower 30s across the east-central WI.
154 PM EST Fri Nov 19 2021 High pressure returns today with cooler temperatures and dry conditions in place for the weekend.
201 PM CST Fri Nov 19 2021 High pressure will move off to the east tonight, which will set the stage for milder south winds on Saturday. The forecast will follow the consensus guidance, with lows around freezing tonight.
These winds will gradually decrease this afternoon as the trough axis moves to our east. For Saturday, guidance has trended slightly warmer for temperatures as we will probably see a good amount of sunshine before additional mid and high clouds return in the late afternoon and evening.
1138 AM CST Fri Nov 19 2021 The period of quiet weather continues for the next few days as a series of dry cold fronts push through the region keeping temperatures near average for this time of year. Temperatures will generally range from the mid to upper 50s today and in the low to mid 60s on Saturday.
As this low moves into the Texas panhandle, a cold front northeast of the low will move into northwest Oklahoma Saturday with highs behind the front tomorrow expected to be near today's maxes. South of the front though, veering winds will advect warmer air above the surface with 925 mb/850 mb temperatures expected to be much warmer than today, especially southwest, which will allow surface temperatures tomorrow to be warmer south of the cold front.
Temperatures are currently in the low-to-mid 40s and are unlikely to go much higher the rest of the day, leaving high temperatures about 15 degrees below normal across the area. These high clouds, along with increasingly southerly near-surface winds, will keep minimum temperatures 5-10 degrees warmer than this morning, with upper 20s expected in the Bluegrass and lower 30s elsewhere. However, we will keep things dry for now as the low-to- mid levels of the atmosphere will continue to be very dry through at least tomorrow afternoon.
222 PM CST Fri Nov 19 2021 Much of the CONUS is seeing quasi-zonal flow early this afternoon, with the exception of the Northeast and Pacific Northwest where low amplitude troughs are progressing eastward. The aforementioned Pacific trough digs into the Rockies during the day Saturday and brings a weak frontal boundary south late.
A mix of fog and low stratus is expected to expand over the Inland Northwest tonight, and light upslope flow across northeast Washington and the Idaho Panhandle is also expected to produce drizzle late tonight with pockets of freezing drizzle possible.
Lows on Saturday night will rise above freezing, mid 30s Cumberland Plateau Region to lower 40s west per best low level warm air advection established.
Saturday will be dry with moderating temperature as high pressure crosses. Lessening winds and cloud cover will result in below normal temperatures overnight, with some areas reaching the low 20s by Saturday morning. With brief high pressure and a return to zonal flow aloft, temperature will moderate this weekend with a shift in wind direction to the south as the nose of the subtropical jet approaches.
410 PM EST Fri Nov 19 2021 Chilly high pressure will remain over the region through this weekend.
648 PM EST Fri Nov 19 2021 High pressure offers dry conditions through the start of the weekend.
957 PM EST Fri Nov 19 2021 A cold front is making its way across the local area tonight.
At the surface, a weak trough axis is bisecting the area, stretching roughly from near Ogallala to O'Neill. Westerly downslope flow behind this boundary is promoting warmer temps amid the persistent cloud cover, with low 60s noted west of HWY 61. For tonight, skies will continue to slowly clear from west to east as the trough axis exits, with the exception of far northern Nebraska. Confidence in this remains low, with a lot of dry air indicated in the lowest few kilometers of forecast soundings. It appears as the low levels begin to saturate, upper level support begins to wane, with a disconnect in the better low level saturation and upper forcing.
An upper trough is over Idaho currently bringing light valley rain and mountain snow. Also, expect breezy winds (15 to 25 mph) overnight as this trough moves through the area overnight. Thus, with high pressure building in, ample moisture, and overall light winds, fog development is possible Saturday morning for the Island Park area. High pressure builds back in with overall dry conditions and overall clear skies by early Saturday evening.
112 PM PST Fri Nov 19 2021 Strong high pressure will build over the region this weekend for continued dry weather. Water vapor imagery shows a big fetch of high clouds moving into California and the flow shows ridging moving towards the area.
504 PM CST Fri Nov 19 2021 High pressure will move off to the east tonight, which will set the stage for milder south winds on Saturday. The forecast will follow the consensus guidance, with lows around freezing tonight.
It's worth noting that a weak coastal trough looks to take shape across the Western Gulf. Otherwise, we will be bit warmer tomorrow as onshore flow persists with highs topping out in the upper 70s to around 80 degrees. Lows tomorrow night look to fall into the low to mid 60s.
Breezy northerly winds will prevail with much cooler and drier conditions returning later this weekend. /issued 122 PM EST Fri Nov 19 2021/ A relatively weak front will continue to sink slowly south over the region today and Saturday as high pressure builds in to our north.
110 PM PST Fri Nov 19 2021 High pressure returns for the weekend with warm temperatures and valley inversions.
The fair weather pattern continues with high pressure now situated over the Ohio Valley and zonal flow aloft. So, temperatures overnight will be a tad warmer than last night, but still well below normal and bottoming out below the freezing mark. But, an influx of moisture ahead of the next upper trough will keep skies cloudy. The rain chances will return to central Indiana as H5 fall ahead of the next trough dropping into the Upper Midwest. Plus, a frontal system and associated cold front ahead of the trough will provide some additional forcing as moisture continues to ramp up over the area.
Afternoon highs in the upper Yampa reach the lower 40's so either a wet snow or rain/snow mix is expected therefore a dusting to a couple of inches are possible along the highway 40 corridor. The central and northern mountains may pick up a quick 3-5 inches with the higher totals in the Park Range. However, where cloud cover takes hold, expect highs as much as 10 degrees cooler than today.
Issued by National Weather Service Sioux Falls SD 558 PM CST Fri Nov 19 2021 A weak mid level trough currently over Washington/Oregon, will track eastward overnight and across the CWA during the morning hours on Saturday. The area will see increasing cloud cover this evening and through the overnight, which may keep low temperatures warmer, especially in central SD, where a few models suggest lows in the mid to upper 30s. Depending on model used, the mid level trough appears rather moisture starved, with maybe very light pcpn, or none at all occurring. A strong cold front will approach the CWA late Saturday night with increasing northwesterly winds expected.
/Issued 110 PM PST Fri Nov 19 2021/ High pressure returns for the weekend with warm temperatures and valley inversions.
Early this afternoon, temperatures ranged from the upper 30s in north central Illinois, to the low 40s across southern Iowa. At the surface, high pressure was centered east of the area and winds were out of the south/southeast. Tonight, the high clouds should keep the area warmer especially given WAA into our area. Have changed lows little from the overnight, but did pull them down a couple degrees as we seem to be on the high end of guidance.
With the higher precipitable water values and better lift, there could be a few rain showers across the southeast late Saturday night. With temperatures above freezing, not expecting any freezing rain late Saturday night.
336 PM PST Fri Nov 19 2021 Updated Air Quality Issues section Strong high pressure will build over the region this weekend for continued dry weather. Water vapor imagery shows a big fetch of high clouds moving into California and the flow shows ridging moving towards the area.
910 PM EST Fri Nov 19 2021 Chilly high pressure will remain over the region through this weekend.
Ensemble guidance is in agreement ridging will build into northern California over the weekend.
Much of the CONUS is seeing quasi-zonal flow early this afternoon, with the exception of the Northeast and Pacific Northwest where low amplitude troughs are progressing eastward. The aforementioned Pacific trough digs into the Rockies during the day Saturday and brings a weak frontal boundary south late.
/Issued 238 PM EST Fri Nov 19 2021/ Sprawling high pressure is anchored across the Ohio Valley. The high center will move east overnight and then offshore the Mid Atlantic late tomorrow afternoon or evening. (The growing season for Fannin, Towns, Union and White counties has ended previously due to sub freezing temps.
517 PM CST Fri Nov 19 2021 VFR conditions will dominate all station due to high pressure.
639 PM EST Fri Nov 19 2021 High pressure will prevail through this weekend.
Saturday will be dry with moderating temperature as high pressure crosses. Lessening winds and partial cloud coverage will result in below normal temperatures overnight, with some areas reaching the low 20s by Saturday morning. With brief high pressure and a return to zonal flow aloft, temperature will moderate this weekend with a shift in wind direction to the south as the nose of the subtropical jet approaches.
A few coastal showers may reach the ne Fl coast on Saturday as a weak inverted trough develops.
At the surface, high pressure remains rooted over the eastern CONUS with ridging nosing into the region from the northeast. Northerly surface flow tonight will transition to more easterly through early Sunday as our region remains on the southwest periphery of the high pressure. On Sunday, highs increase to the low to mid 70s across the area.
(Today and tonight) Variable high level cloud cover expected today with an overall increase late in the day and tonight ahead of positive tilted longwave trough and associated eastern Pacific connection. Associated and ahead of this trough, relatively weak cold front will progress slowly across the region late today and tonight. While is should be noticeably warmer today than the temperatures seen yesterday, mentioned high level cloud cover and weaker/developing northerly winds should keep highs in the 60s across the northern half of Oklahoma, while southern Oklahoma and northern Texas could see highs well up in the 70s.
Next cold front passes Sunday morning and will pass thru dry for most places.
At the upper levels, there is weak ridging across the area. After a cold start with many valleys in the low to mid 20s this morning, we'll warm up nicely to the mid and upper 50s this afternoon with a light southerly flow. Overnight low temps will be in the lower 30s in the deeper river valleys, to mid and upper 30s elsewhere. On Sunday, a cold front will approach the area from the west. Afternoon high temps will be in the low to mid 50s. The upper levels start with a trough located over central Canada and over the Midwestern states. To the west, high pressure off the California coast will be building, with ridging extending into the Pacific Northwest.
259 AM CST Sat Nov 20 2021 It was another chilly night across Middle Tennessee, although a few degrees above last night thanks to some high clouds and slight return flow as a high pressure center moves off to the east. Today will be 5 to 10 degrees warmer than yesterday as south winds increase. Clouds will increase as a cold front takes shape over the Midwest. The cold front will sweep through the area Sunday evening, pushing the showers out and letting the cold air in.
130 AM CST Sat Nov 20 2021 Temperatures this morning as of 07z are fluctuating quite rapidly between the upper 20s/lower 30s, where SFC winds are calm, all the way up into the lower 40s, where SFC winds are around 5 knots. Locations that are seeing the wind blow this morning, the nocturnal stable layer is mixing out bringing the lower 40 degree temperatures at the top of the inversion down to the SFC. By daybreak, the winds should relax and most places will wake up to temperatures around freezing. As for the rest of the day, high pressure to our east will continue to dominate the weather across the Tennessee Valley. As a result, not nearly as cold with lows Sunday morning only in the lower 40s. South of this trough, a cold front will stretch southward from the Midwest towards AR/OK.
McD Chattanooga Airport, TN 31 57 41 60 40 / 0 0 0 60 60 Knoxville McGhee Tyson Airport, TN 30 56 38 57 39 / 0 0 0 60 70 Oak Ridge, TN 29 55 38 55 37 / 0 0 0 70 70 Tri Cities Airport, TN 24 55 31 54 37 / 0 0 0 60 70.
1003 PM EST Fri Nov 19 2021 Northeast breezes have freshened over the Keys and adjacent coastal waters as sprawling high pressure of up to 1035 mb dominates the eastern U. The moisture flux off the warmer Gulf Stream waters will likely support boughts of showers with a lightning strike or two, otherwise most of the showers may have low amounts. Northeast winds are also strengthening across the Gulf waters as the pressure gradient tightens, a result of building high pressure from the north.
Temperatures tonight, as a result of the increased clouds, may stay warmer than previously forecast. SUNDAY: Winds will remain light through the nighttime hours, but will begin to increase quickly by daybreak as a stronger cold front enters the Plains.
Light and variable winds will trend light northwest through daybreak, with sunrise temperatures a few degrees above normal in the lower 30s. Weak cool advection is expected by afternoon on the increased northerly flow, but despite this, afternoon temperatures are expected to achieve the lower 60s, assuming cirrus doesn't get too thick too quickly. Cool advection continues, but with thick clouds and a breezy mixed boundary layer, sunrise Sunday temperatures will again be a few degrees above normal, in the lower to mid 30s.
1255 AM EST Sat Nov 20 2021 A strong pressure ridge over the Mid Atlantic region will extend into the area as it shifts northeast to New England.
Then, a low pressure system will move into the area later Saturday night and bring rain to the area especially for Sunday.
However, the low levels will remain dry during this time. A warmer start this morning and some warm advection will allow temperatures to peak in the middle 40s to lower 50s. A stronger upper trough will influence the area overnight tonight and Sunday. Accompanying the trough on Sunday will be a surface cold front. Forcing from the upper trough/surface front along with the moisture will be enough to go with likely or higher category PoPs most areas, mainly later tonight into the first half of Sunday, based on the expected timing of the surface front. Lack of convective elements and the speed of the system should inhibit the threat of heavy rain, even with the higher precipitable water content. Rain and the cold frontal passage will help keep temperatures in the 40s to around 50 on Sunday.
Not expecting any freezing rain or mixed precip with temperatures expected to remain above freezing.
919 PM CST Fri Nov 19 2021 Tranquil conditions are continuing across the Tennessee valley this evening, with high pressure at the surface centered just north of the area. Southerly flow returns quickly on Saturday as the low-level ridge shifts off to the east. Cloud cover will increase late Saturday night into Sunday morning ahead of an approaching upper level trough and associated cold front. Overnight lows will be a good bit warmer with this continued southerly flow and increasing cloud cover. The main story in the extended will be the anomalously cold airmass that will build into the region behind the departing cold front.