Aikyam-Lab/Synoptic-Bench huggingface dataset:
328 AM CDT Fri Apr 2 2021 Water vapor satellite early this morning showed the upper low over southern California with a ridge building downstream over the Plains amidst northwest flow aloft. Winds remain from the south tonight with lower PBL remaining mixed with lows only cooling off into the lower to mid 40s.
536 AM CDT Fri Apr 2 2021 (Today and tonight) Surface pressure falls will occur today across the high Plains resulting in increasing pressure gradient and gusty south winds across the area. These south winds and increased cloud cover will also keep temperatures warmer tonight with most locations remaining well into the 40s.
442 AM CDT Fri Apr 2 2021 09Z / 4 AM CDT surface map showed a 1035mb pressure ridge centered just south of Chicago, extending down to northeast AR. The pressure ridge axis will move off to the Appalachians tonight. Light return flow around the western periphery of the high pressure will likely keep temps above freezing along and west of the MS River tonight. Areas to the east, especially valley locations, may see another night of freezing or near freezing low temperatures.
More pronounced warming can be expected on Saturday with upper level ridging centered over the Plains and strengthening southwesterly winds.
Expect a gradual increase in marine layer clouds along with cooler temperatures heading into the weekend. An upper level trough over the E Pacific is forecast to dig southward and become more positively tilted over the weekend. Deterministic model guidances continue suggesting a slowly SE progression of this system, but still uncertainty the position of the upper level trough over the W US and the E Pacific.
/This Afternoon/ Canadian sfc ridging remains anchored this morning from the OH Valley SW across the MS Valley into E TX, with a cool and comfortable air mass expected to linger over the region through the day.
535 AM EDT Fri Apr 2 2021 A deep mid and upper-level trough axis over the Commonwealth this morning will shift east over the next 24 hours, but not before bringing another brisk and unseasonably cold day, with some flurries through the mid morning hours.
1042 AM EDT Fri Apr 2 2021 Currently - Strong northerly breezes continue across the Keys this morning after yesterdays cold front passage. All post cold front stratocumulus cleared southwards into the Florida Straits and off the southeast coast. Short Term Update - The previously mentioned high pressure system will settle slightly southeastwards and weaken a few millibars, but the overall gradient will remain quite steep. This effect will be strongest over the Lower and Middle Keys and adjacent waters, however will last on the order of 3 hours. High pressure over the eastern United States will maintain a very tight pressure gradient across Keys waters this afternoon.
1044 AM EDT Fri Apr 2 2021 High pressure will maintain fair weather across our region through midday Saturday. A weak warm front will cross our region later Saturday and Saturday night with light precipitation of rain or snow.
Near-critical conditions will certainly be in place across a majority of the High Plains of Wyoming and Nebraska.
954 AM CDT Fri Apr 2 2021 High pressure remains over the Tennessee Valley this morning, keeping skies clear. As the center of the anticyclone shifts closer to northern Alabama and southern Middle Tennessee, northerly winds will continue to weaken through the day today. This will allow temperatures to get a bit warmer than yesterday, though still chilly with highs only in the 50-55 degree range. Lighter winds should better allow locations near large bodies of water to be slightly warmer regarding low temps. Temperatures should rebound during Sat, rising into the lower 60s most spots still cooler than normal levels.
314 AM MDT Fri Apr 2 2021 Ridging continues to dominate, but a Pacific front will somewhat temper the dryness across the area. Saturday will be just as dry, but a few degrees warmer with more sunshine.
521 AM EDT Fri Apr 2 2021 A deep mid and upper-level trough axis over the Commonwealth this morning will shift east over the next 24 hours, but not before bringing another brisk and unseasonably cold day, with some flurries through the mid morning hours.
912 AM EDT Fri Apr 2 2021 Dry weather and a warming trend is expected through the weekend under high pressure. Building high pressure should maintain mostly sunny skies today, though high temperatures are still expected to be 10 to 15 degrees below seasonable levels with cold air aloft in place.
A persistent westerly flow aloft will continue the dry, breezy, and warmer than normal conditions across the region through the weekend.
With a broad upper level ridge centered to our east over the Rocky mountains, deep southwest flow over the forecast area will continue through Saturday. During this time, a positively tilted trough in the Gulf of Alaska will slowly approach the region. There is a fair amount of moist air at 300 mb ahead of this low, therefore, we will probably see some upper level clouds swing through the area this afternoon and evening. This may help keep temperatures a little cooler than what we've seen the last few days, but we'll still see plenty of sunshine throughout the day. Look for highs in the lower 70's west of the Cascades and mid to upper 60's east of the Cascades Friday and again Saturday.
The ridge will resume building tonight and slightly warmer low temperatures are expected, in the mid 30s to mid 40s F on the plains and mid 20s F in the mountains. Upper level ridge will be parked over the Central Rockies through the weekend.
1046 AM EDT Fri Apr 2 2021 High pressure should build overhead to provide dry weather for this weekend.
Given strong mixing potential in south-southwest flow and lack of a strong push of low level moisture from our south, leaned toward the warmer/drier RAP/HRRR solutions, which tend to excel over other models in dry patterns. At this time, it appears the lowest RH will be offset from the strongest winds of the day, both in timing and area, so have coordinated with neighbors to forgo a Red Flag Warning at this time.
Water vapor satellite early this morning showed the upper low over southern California with a ridge building downstream over the Plains amidst northwest flow aloft. Winds remain from the south tonight with lower PBL remaining mixed with lows only cooling off into the lower to mid 40s.
/issued 423 AM CDT Fri Apr 2 2021/ Weak upper trough running under the ridge will pass over AZ today and into NM tonight before moving over the region Saturday.
647 AM EDT Fri Apr 2 2021 High pressure and a very dry atmosphere will sustain clear skies into late afternoon before an increase in high level clouds occur. High pressure will move across the area producing sunny skies and lighter winds. Increase in southwest flow and warmer air will push highs mostly to the mid 50s to around 60.
Southerly low level flow will increase today as an upper ridge continues to build into the midwest. Dewpoints will be in the lower 20s Friday morning, reaching the lower 30s in the afternoon. Deeper mixing will bring warmer temperatures under mostly clear skies. Given the potential for warmer, drier air to mix in today, we decided to issue a Red Flag Warning for the entire CWA, in coordination with our neighbors.
Currently a ridge of high pressure is the main dominating synoptic feature over our CWA. Within this ridging pattern, a weak upper level wave is expected to propagate eastward just to the south of the region. In response to the increased forcing over the higher terrains, clouds will likely increase in coverage over the whole CWA. As the aforementioned upper level system continues to weaken and fade into the noise of upper level flow, ridging will continue to dominate over the region. Clouds should begin to thin out and clear by late tonight over the CWA as westerly winds aloft shift more northerly and parallel the higher terrains.
Expect more freezing temperatures tonight especially near the Tennessee River. /issued 442 AM CDT Fri Apr 2 2021/ 09Z / 4 AM CDT surface map showed a 1035mb pressure ridge centered just south of Chicago, extending down to northeast AR. The pressure ridge axis will move off to the Appalachians tonight. Light return flow around the western periphery of the high pressure will likely keep temps above freezing along and west of the MS River tonight. Areas to the east, especially valley locations, may see another night of freezing or near freezing low temperatures.
516 AM EDT Fri Apr 2 2021 A deep mid and upper-level trough axis over the Commonwealth this morning will shift east over the next 24 hours, but not before bringing another brisk and unseasonably cold day, with some flurries through the mid morning hours.
844 AM EDT Fri Apr 2 2021 Cold breezy start to the day with temps well below normal under clear skies as Canadian high pressure continues to build into the region. A high pressure ridge building over the region will bring breezy, cool and dry conditions to the Peninsula this morning. Breezy conditions will make temperatures feel a few degrees cooler, so it might not be the best day to go the beach. A gradual warmth in temperatures is expected through the weekend as high pressure builds. High pressure will continue to dominate the rest of the period.
555 AM CDT Fri Apr 2 2021 Surface analysis shows the Canadian high pressure center to the east of the forecast area and a light southeast wind has developed west of the ridge axis. The pressure gradient is expected to increase today over the area as the Canadian high pressure system continues to drift to the east.
442 AM MDT Fri Apr 2 2021 Current surface map shows trof moving through eastern Montana/eastern Wyoming. Main story through the weekend will be critical fire weather conditions as flat upper level ridge sets up across the plains. Surface trof crosses the western Dakotas this morning, with gusty northwest winds.
/issued 333 AM CDT Fri Apr 2 2021/ SHORT TERM (Now through Saturday): Deep South Texas and the Rio Grande Valley will be under the influence of a 500 mb ridge of high pressure that will become less amplified as closed mid-level low pressure moves into north Texas.
Surface winds will become breezy today as the surface pressure gradient tightens due to a lee cyclone dropping into SE CO. /issued 347 AM CDT Fri Apr 2 2021/ A breezy day ahead as the surface pressure gradient over the area tightens in response to a lee cyclone dropping into SE CO. Mid-level moisture advected ahead of a trough over Baja California at 2 AM will promote a layer of mid-level clouds this afternoon into this evening. With the low levels rather dry, despite moisture advection from southerly winds, the chances of any precipitation making it to the ground is rather low.
423 AM CDT Fri Apr 2 2021 Weak upper trough running under the ridge will pass over AZ today and into NM tonight before moving over the region Saturday.
Today while windy, it will be warmer. with highs expected in the low 70s area wide. Saturday looks to be beautiful as upper level ridging begins to move in.
/issued 442 AM CDT Fri Apr 2 2021/ 09Z / 4 AM CDT surface map showed a 1035mb pressure ridge centered just south of Chicago, extending down to northeast AR. The pressure ridge axis will move off to the Appalachians tonight. Light return flow around the western periphery of the high pressure will likely keep temps above freezing along and west of the MS River tonight. Areas to the east, especially valley locations, may see another night of freezing or near freezing low temperatures.
548 AM EDT Fri Apr 2 2021 Dry weather and a warming trend is expected through the weekend under high pressure. Building high pressure should maintain mostly sunny skies today, though high temperatures are still expected to be 10 to 15 degrees below seasonable levels with cold air aloft in place.
607 AM CDT Fri Apr 2 2021 High pressure ridging into the region from the NE will provide generally clear skies this morning. High pressure aloft and at the surface will keep skies generally clear today. The onshore flow and additional cloud cover will yield warmer overnight low temperatures.
High pressure aloft and at the surface will keep skies generally clear today. The onshore flow and additional cloud cover will yield warmer overnight low temperatures.
JB Chattanooga Airport, TN 55 30 63 38 69 / 0 0 0 0 0 Knoxville McGhee Tyson Airport, TN 49 26 60 37 67 / 0 0 0 0 0 Oak Ridge, TN 53 26 61 36 68 / 0 0 0 0 0 Tri Cities Airport, TN 47 20 58 33 65 / 0 0 0 0 0 NC.
Highs will be in the low to mid 50s today, with lows tonight in the 30s.
906 AM MDT Fri Apr 2 2021 No updates planned this morning as an upper ridge remains over the region. Above normal temperatures continue across the region with breezy west to southwest winds expected across Eastern Oregon and the higher terrain in Southwest Idaho. Surface winds: southeast to southwest 5 to 15 kts with gusts to 25 kts across southeast Oregon and the higher terrain of southwest Idaho until 03z/Saturday. Gusty surface winds to 25 kts Saturday afternoon across southeast Oregon and the higher terrain of southwest Idaho.
1236 PM EDT Fri Apr 2 2021 High pressure will continue to hold firm through the next 24 hours with a very dry airmass in place in the lowest 10 kft. Moderate southwest flow then develops Saturday with gusts 20-25 knots as the ridge axis shifts off to the east. High pressure will move across the area producing sunny skies and lighter winds. Increase in southwest flow and warmer air will push highs mostly to the mid 50s to around 60.
An upper level jet on the leading edge of the upper level ridging will move through tonight, which will swing a weak front into the area. This will do little to change temperatures, in fact tomorrow will be warmer than today.
High pressure has settled into the region giving way to clear skies and much cooler conditions. Lows will range from the low/mid 20's to the lower 30's. High pressure only slightly moves eastward on Saturday.
1147 AM MDT Fri Apr 2 2021 Current surface map shows trof moving through eastern Montana/eastern Wyoming. Main story through the weekend will be critical fire weather conditions as flat upper level ridge sets up across the plains. Surface trof crosses the western Dakotas this morning, with gusty northwest winds.
1147 AM CDT Fri Apr 2 2021 Updated aviation portion for 18Z TAF issuance Turning considerably warmer the next couple days. A broad, low amplitude ridge will expand east the next couple days, eventually covering the entire CONUS during the weekend. A large anticyclone will continue to shift east of the area today and tonight, allowing a weak frontal boundary to drop into the region on Saturday.
220 PM CDT Fri Apr 2 2021 Clear skies will continue to prevail tonight as high pressure remains over the Tennessee Valley. With this in mind, temperatures again should drop below freezing overnight, so a Freeze Warning is again in effect for the overnight hours through mid-morning Saturday.
217 PM EDT Fri Apr 2 2021 High pressure will maintain fair weather across our region through midday Saturday. A weak warm front will cross our region later Saturday and Saturday night with light precipitation of rain or snow.
Having said that, cirrus is forecast to begin moving over the forecast area late tonight, and this will likely keep temperatures well above freezing over the Delta region, while limiting cooling a bit farther east prior to daybreak.
This mostly affected areas southward with temperatures 3-4 degrees cooler than previously advertised. Highs will be in the low to mid 60s. With near ideal radiational cooling conditions, expect one more morning (Saturday) where much of the area cools to near or below freezing.
242 PM MDT Fri Apr 2 2021 The ridge axis continues to be positioned over the Cowboy State today. With most of the snow in the lower elevations gone, and the 700mb temps in the 0 to +3 range, high temps today will continue to be 15 to 20 degrees above normal. Tomorrow, we are also still looking at near record highs across most of the region as the ridge remains in place.
308 PM EDT Fri Apr 2 2021 High pressure will build into the region this weekend.
However, the clouds into early afternoon will likely take a couple degrees off, and then we should also see some slightly cooler air surge southward out of the deeper inversions in the South Platte/Cache La Poudre valleys. The ridge will resume building tonight and slightly warmer low temperatures are expected, in the mid 30s to mid 40s F on the plains and mid 20s F in the mountains. Upper level ridge will be parked over the Central Rockies through the weekend.
Our confidence has increased in frost potential overnight across south-central Missouri as winds slacken off and temperatures fall into the lower and middle 30s. The lowest humidities will occur across the eastern Ozarks.
Sharp upper ridge continues moving into the Great Lakes this afternoon. So expect nothing more than some high and mid level cloudiness to accompany the trough as it moves across our region. Expect lows tonight in the lower and mid 30s near Lake Michigan, 20s elsewhere. Pattern synopsis and forecast: High pressure will dominate the eastern half of the CONUS. With the aforementioned high pressure center moving just to the east of northern Michigan. southwestward winds will begin advecting warmer air.
152 PM EDT Fri Apr 2 2021 High pressure will maintain control throughout this weekend.
Under abundant sunshine, temperatures have warmed into the lower and middle 60s. Increasing moisture aloft was noted upstream, traversing modest ridging over the southern plains, and ushering some high clouds acrs TX and into SW LA. Guidance suggests some light showers developing acrs SE TX during the day Saturday, but expect this activity will remain west of our area, with showers diminishing as they encounter the drier air in the low to mid levels acrs our region.
1143 AM MDT Fri Apr 2 2021 Models still handling the flat ridge well across the western half of the US, with well above normal temperatures expected today and again tomorrow. Highs for the lower elevations will be a good 15 to 20 degrees above normal, with several record highs threatened today and Saturday.
/Tonight through Friday/ At 19z GOES water vapor imagery depicted broad ridging aloft over the western two-thirds of the conus and a deep trough over the east. A low amplitude wave was cresting the ridge axis as it tracked along the Canadian border with an attendant surface reflection centered over South Dakota. The relaxed gradient within the pressure trough results in lighter winds and an overall fantastic day as highs warm into the 70s.
Lows tonight are expected to fall again into the low 30s and upper 20s for several hours which could damage crops or other sensitive vegetation.
Cronce (Issued 353 AM CDT Fri Apr 2 2021) Today through Saturday Night: High pressure centered over Illinois early this morning will gradually move southeast out of the region today.
356 PM EDT Fri Apr 2 2021 High pressure will shift to the east on Saturday. Another night of freezing temperatures will occur. High pressure shifts to the east for Saturday allowing for southerly flow and warmer temperatures. The lowest RH values are expected to be across Scioto Valley locations where the winds will not be as high. There will be building mid level heights along with southerly low level flow between a high to the southeast and a developing warm front in the Great Lakes.
Sharp upper ridge continues moving into the Great Lakes this afternoon. So expect nothing more than some high and mid level cloudiness to accompany the trough as it moves across our region. Expect lows tonight in the lower and mid 30s near Lake Michigan, 20s elsewhere.
A warm weekend ahead as 700mb temperatures continue to climb under a strong/broad upper level ridge.
With light winds expected overnight, good radiational cooling pattern will develop which should allow low temperatures to dip to near freezing overnight. While a few locations could touch/dip below freezing, mainly across our extreme northern counties in SE Alabama and south- central Georgia, most locations should remain above freezing. Recent guidance has not trended any cooler and we were already running lower than most guidance so left the frost advisory in effect tonight.
The forecast area currently finds itself on the backside of a narrow, yet relatively deep, mid-level trough along the eastern coastline, and a positively tilted ridge to the north and north west. This places Georgia in mid-level northwesterly flow with quite a bit of subsidence that very cool and dry air into the lower atmosphere. With clear skies on the backside of a cold front, radiational cooling overnight has once again prompted a Freeze Warning for the forecast area tonight into tomorrow morning where the Frost/Freeze program has already begun.
Sprawling SFC/LL high pressure remains dominant, while deep upper trough across the eastern US slowly dampens and eventually transitions into a weak ridge. In addition to this morning's freezing temps, we are likely to see freezing temps most of the area again Saturday morning. These features will be supported by a fairly deep upper low as well. Cold front is expected to push by on Fri, with trailing closed upper low moving over the immediate vicinity late Fri into early Sat. VFR will continue tomorrow as high pressure dominates the region.
In the upper levels, a closed low continues to slowly track east through the Desert Southwest advecting Pacific moisture aloft.
212 PM EDT Fri Apr 2 2021 High pressure will maintain control throughout this weekend.
1219 PM CDT Fri Apr 2 2021 (Today and tonight) Surface pressure falls will occur today across the high Plains resulting in increasing pressure gradient and gusty south winds across the area. These south winds and increased cloud cover will also keep temperatures warmer tonight with most locations remaining well into the 40s.
This mornings RAP model guidance has been showing the low level jet weakening somewhat and propagating to the east. Weaker flow was noted farther south with a closed upper low over Arizona moving east. A weak disturbance moving out over the northern Plains will push a weak cold front into central and southwest Kansas late tonight which will stall out on Saturday.
Won't rule out a rumble or two of thunder by this evening, however, confidence is low in much of any wetting rain reaching the ground (other than the highest of peaks) due to the dry subcloud layer present. The weakening trough responsible of an uptick in moisture across the southern mountains will continue its journey eastward tonight, and remain well south of the area. The ridge axis moves directly overhead by Saturday and the heater cranks up a notch this weekend. Guidance is still on track with high temperatures reaching and possibly exceeding record values, with highs running 5 to 10 degrees warmer than today. HiRes models indicate mid level moisture triggering afternoon clouds across the higher terrain again Saturday afternoon, but similar as this evening, don't anticipate any moisture reaching the ground.
227 PM EDT Fri Apr 2 2021 Dry high pressure will continue over the region through the weekend. Winds will decrease tonight with chilly temperatures and well below freezing temperatures by morning.
Cloud cover has been on the increase, which is limiting the higher temperatures in the northern Red River Valley.
1226 PM CDT Fri Apr 2 2021 Surface analysis shows the Canadian high pressure center to the east of the forecast area and a light southeast wind has developed west of the ridge axis. The pressure gradient is expected to increase today over the area as the Canadian high pressure system continues to drift to the east.
201 PM EDT Fri Apr 2 2021 High pressure will maintain fair weather across our region through midday Saturday. A weak warm front will cross our region later Saturday and Saturday night with light precipitation of rain or snow.
Heading into tomorrow, temperatures will warm even further as ridging builds overhead, warming into the upper 70s for most. South to southwest winds will continue tomorrow ahead of this trough, but will be a good bit weaker than today as the Upper Midwest low shifts eastward and the local pressure gradient further weakens.