Aikyam-Lab/Synoptic-Bench huggingface dataset:
326 PM CDT Fri Apr 2 2021 (Issued 326 PM CDT Fri Apr 2 2021) Tonight and Saturday: High pressure is moving off to the southeast and we have gusty south winds this afternoon. Winds will diminish at the surface this evening with the inversion, but the low level jet will bring winds in excess of 50 kt just above the ground.
347 PM EDT Fri Apr 2 2021 Currently - Strong north to northeast breezes continue across the Keys and surrounding waters early this afternoon due to an expansive high pressure system centered in the Mississippi Valley. A stable post cold front environment continues and no shower activity is present on local radar. Forecast - The strong high pressure system will maintain a very tight pressure gradient tonight, holding strong north to northeast breezes.
(This evening through Saturday) Gusty southerly winds and mild temperatures are affecting the area this afternoon, as an upper level trough located in AZ approaches from the west. This low is expected to continue moving east/southeast tonight into Saturday, and provide just enough lift combined with increasing low level moisture, to give parts of our area, mainly south of I-20 from late tonight into Saturday. For Saturday, we should see another cooler than normal day with mostly cloudy skies and the possibility of some showers in the area.
The upcoming weekend will feature the same surface pressure gradient - between a ridge to our east and upstream troughing - so dry, warm southerly winds will continue. The low level jet will not be a persistent feature through the weekend, so gusty/breezy conditions aren't quite as likely.
Expect freezing temperatures to occur across the majority of the area as a result, and will issue another freeze warning across the southern tier where the growing season has begun.
138 PM EDT Fri Apr 2 2021 High pressure will maintain control throughout this weekend.
324 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.
Model guidance is coming in slightly warmer with overnight min temps, but with ideal conditions for radiational cooling (high pressure ridging from northeast to southwest across the area, winds very light or calm, and clear skies) we will be maintaining our current Freeze Warning and Frost Advisory with no changes planned. We did warm overnight min temps slightly, a degree or two in some areas, but overall expect at least pockets of freezing temps in the warned area, and with widespread low to mid 30 temps expected across most of the interior zones, even more of the area still has the potential for areas of frost late tonight. This will allow temps to warm a little more than today, with highs ranging from the mid 60s to the lower 70s across the region under mostly sunny skies.
A short wave trough will move into West Texas and North Central Mexico Saturday night, possibly triggering convection over the Sierra Madre Oriental Range, but model consensus has kept precip out of the CWA for now.
156 PM CDT Fri Apr 2 2021 Increased/breezy southerly flow across the region this afternoon as high pressure slides east into the Ohio River valley region while a weak trough of low pressure was moving across the Dakotas. Otherwise, lows are expected to bottom out on the lower 30s to near 40. That aforementioned Dakotas trough makes passage through the area Saturday but very little expected with it other than a weak wind shift from southwesterly to northwesterly, blowing around 10 mph.
An even warmer day Saturday. A flattened upper ridge will extend across the U.
1119 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. Some increase in cloud cover is expected Saturday/Saturday night as warm advection occurs associated with a passing weak trough.
/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.
On Saturday, 850mb temperatures are expected to be a few degrees warmer than today.
253 PM MDT Fri Apr 2 2021 A flat ridge of high pressure will remain across the forecast area through Saturday. Highs on Saturday will be about 2-3 degrees warmer than today given another 1-1.
Hettinger airport is currently observing the lowest humidity value of 9 percent but others will likely follow, dipping below 10 percent. Behind a surface pressure trough (currently approaching the southern James River valley), winds will be out of the northwest sustained around 20 mph. Broad ridging starts to nudge in Saturday night and we will see lows mainly in the 30s with a few lower 40s across the south.
High pressure at the surface will bring clear skies leading to VFR conditions for the next 24 hours. Diegan Chattanooga Airport, TN 30 63 38 69 45 / 0 0 0 0 0 Knoxville McGhee Tyson Airport, TN 26 60 37 67 44 / 0 0 0 0 0 Oak Ridge, TN 26 61 36 68 44 / 0 0 0 0 0 Tri Cities Airport, TN 20 58 33 65 41 / 0 0 0 0 0 NC.
Skies are clear with dewpoint values in the lower 20s. A high pressure over the area will move off to the east tonight. Temperatures will continue to be rather chilly with lows below freezing at the Tennessee River.
321 PM EDT Fri Apr 2 2021 A moderating trend will ensue into the weekend as high pressure settles south of the area and return southerly flow bring a milder air mass north/northeast into the forecast area on Saturday.
High pressure will push temperatures well above normal, with record high temperatures likely through the upcoming weekend.
218 PM EDT Fri Apr 2 2021 Amplified upper trough down the Eastern Seaboard extends over FL with very dry NW flow aloft as seen in water vapor imagery this afternoon. The upper trough to slowly move into the W Atlantic this weekend as WNW flow aloft continues.
A strong southerly flow across the region this afternoon as high pressure moves east into the Ohio River valley region while a weak trough of low pressure moves across the Dakotas.
With some dry air still covering much of the lower levels over South Central TX and some areas of mid and high level cloudiness in place, the return of Gulf stratus may be delayed until closer to daybreak Saturday. A broad high pressure ridge over the Srn CONUS will be interrupted slightly by a weak and slow moving disturbance to track across N TX this weekend.
249 PM CDT Fri Apr 2 2021 A tight upper level low is poised over central AZ this afternoon riding to the south of a flat ridge in the western CONUS.
Upper level analysis shows trough over the east coast, with a broad and flat ridge over the Rockies and intermountain west into the high Plains.
1238 PM CDT Fri Apr 2 2021 Upper level ridging and dry air in place will keep VFR conditions over all area TAF sites through the valid forecast period. Skies are expected to clear out again Saturday evening as the upper trough moves south of the state. The Freeze Warning will remain in effect through 14Z this morning as most areas will see near or below freezing temps this morning. This will allow for highs to be a few deg warmer than Thu. A weak upper disturbance will rotate E/SE around the upper ridge to the SW tonight into Sat. These increased clouds and some elevated winds will keep temps warmer for Sat morning. Lows for Sat night will be even warmer than Fri night.
Warmer weather today and through the weekend will bring the warmest temperatures so far this year.
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.
Further west across southeast MO, southwest IL, and the KY Purchase, temperatures look fall to around freezing at their lowest with light surface winds, so opted for a Frost Advisory for the same time period. A few sheltered areas in the Frost Advisory may also fall below freezing, but felt that I-57/US 45 was a good demarcation line for the different headlines. The rest of the short term forecast period looks quiet as high pressure over the southeast CONUS continues to flex its muscles. High temperatures Saturday will climb into the lower to middle 60s.
The low level wind field across the CWA is weak. A flat ridge of high pressure will remain across the forecast area through Saturday. Highs on Saturday will be about 2-3 degrees warmer than today given another 1-1.
846 PM EDT Fri Apr 2 2021 High pressure in place across the area with the cooler, drier, and gusty conditions. Conditions will then remain elevated through the weekend, but just below advisory levels before finally relaxing as the high pressure center builds into the region.
301 PM 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.
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.
723 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.
More frost tonight than last night is likely even with slightly warmer forecast lows as boundary layer moisture is a little greater and winds significantly lower. Near the MS river, some high clouds moving in will likely preclude ideal radiational cooling and therefore those areas are the least likely to dip to freezing though it's not totally out of the realm of possibility that a few spots reach the lowers 30s west of I-55. Highest confidence in prolonged near freezing temperatures is in the Golden Triangle area where lows may briefly reach 29-30F locally. 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.
Marine stratus could return to the coast, especially south of Port Orford late tonight as the thermal trough along the coast weakens followed by a wind reversal.
639 PM CDT Fri Apr 2 2021 00Z TAFS High pressure at the surface will result in light and variable winds overnight becoming light out of the southeast by mid morning. 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.
Boxell (Issued 326 PM CDT Fri Apr 2 2021) Tonight and Saturday: High pressure is moving off to the southeast and we have gusty south winds this afternoon. Winds will diminish at the surface this evening with the inversion, but the low level jet will bring winds in excess of 50 kt just above the ground.
Low temps will fall into the low to mid 60s, augmented by efficient boundary layer mixing and relatively warm nearshore waters (mid to upper 70s). From synopsis: A robust high pressure system has built southeastward into the Southeast United States, resulting in strong to near gale northeast breezes across the Keys coastal waters. On this date in 1987, after a high of 65 degrees and low of 56 degrees the previous day (April 1st), the low temperature of 48 degrees at Key West International Airport shattered the cold record for the date. It is the lowest temperature ever recorded in Key West in the month of April (with the next-lowest being 54 degrees in 1891), and the next-latest sub-50F reading ever is 49 degrees on March 4, 1980.
649 PM CDT Fri Apr 2 2021 Increased/breezy southerly flow across the region this afternoon as high pressure slides east into the Ohio River valley region while a weak trough of low pressure was moving across the Dakotas. Otherwise, lows are expected to bottom out on the lower 30s to near 40. That aforementioned Dakotas trough makes passage through the area Saturday but very little expected with it other than a weak wind shift from southwesterly to northwesterly, blowing around 10 mph.
706 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 a few light rain showers, that may mix with a few wet snowflakes later Saturday night.
319 PM MDT Fri Apr 2 2021 Upper ridging, with the jet north of Montana, is producing mostly clear skies over our region today. Surface lee troughing is contributing to downsloping flow and associated warm temperatures. Cloud cover will increase Saturday night as the upper ridge axis moves eastward and next storm system begins to approach the Pacific Northwest.
745 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.
Upper ridge with southwest flow into the region tonight and Saturday.
713 PM EDT Fri Apr 2 2021 High pressure exits east of Lower MI tonight placing the region between systems for Saturday. The main result is an increase in SW wind and thickening high clouds by late Saturday morning as the next low pressure system and warm front set up in the Midwest. A moderating trend will ensue into the weekend as high pressure settles south of the area and return southerly flow bring a milder air mass north/northeast into the forecast area on Saturday.
748 PM MDT Fri Apr 2 2021 It will remain breezy, dry, and warmer than normal across the region through the weekend, with the grassland fire danger remaining elevated.
Near record heat today due to high pressure aloft. Slightly cooler over the weekend as onshore flow increases, with breezy conditions possible in the wind prone areas of the forecast area.
749 PM EDT Fri Apr 2 2021 High pressure will maintain control throughout this weekend.
1020 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 a few light rain showers, that may mix with a few wet snowflakes later Saturday night.
Still expecting subfreezing conditions across the entire CWA as clear skies and light winds bring about optimal conditions for radiative cooling. 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.
This means one more night of freezing temperatures before a big warm-up tomorrow.
335 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.
900 PM CDT Fri Apr 2 2021 Quiet/unseasonably cold wx conditions prevail across the cntrl TN Valley this Fri evening, as a strong area of high pressure continues to settle ewd into much of the region.
835 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.
655 PM CDT Fri Apr 2 2021 Dry line and associated winds shift has moved into northwest MN with the cold front dropping south into the Devils Lake Basin. Strongest gusts at this time are behind the cold front in the Devils Lake Basin (25-30mph) with fewer gusts east. Clear skies, weakening surface gradient, and lack of unidirectional flow should allow for good decoupling of the lower atmosphere at lighter winds returning this evening. Cloud cover has been on the increase, which is limiting the higher temperatures in the northern Red River Valley.
Southerly winds will keep temperatures warmer than last night, but have lowered overnight lows slightly in most places.
Strong high pressure will continue to build into the southeastern U. Lows again mid-upper 40s inland and toward the Volusia Coast increasing to the low-mid 50s for Brevard and then mid-upper 50s toward the Treasure Coast.
/issued 249 PM CDT Fri Apr 2 2021/ A tight upper level low is poised over central AZ this afternoon riding to the south of a flat ridge in the western CONUS.
A subtle increase in dewpoints to the upper 30s to lower 40s is expected to keep RH values from dropping as far as today, and with the winds a bit lower as well, the GFDI values are forecast to be in the lower to moderate range, thus I do not plan to advertise any fire weather risk at this time tomorrow.
607 PM CDT Fri Apr 2 2021 (This evening through Saturday) Gusty southerly winds and mild temperatures are affecting the area this afternoon, as an upper level trough located in AZ approaches from the west. This low is expected to continue moving east/southeast tonight into Saturday, and provide just enough lift combined with increasing low level moisture, to give parts of our area, mainly south of I-20 from late tonight into Saturday. For Saturday, we should see another cooler than normal day with mostly cloudy skies and the possibility of some showers in the area.
1044 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.
Generally clear skies and light winds expected under the influence of high pressure. AC Chattanooga Airport, TN 31 64 38 69 44 / 0 0 0 0 0 Knoxville McGhee Tyson Airport, TN 26 61 38 67 43 / 0 0 0 0 0 Oak Ridge, TN 27 62 35 68 43 / 0 0 0 0 0 Tri Cities Airport, TN 23 59 33 65 40 / 0 0 0 0 0 NC.
943 PM EDT Fri Apr 2 2021 High pressure will shift to the east on Saturday. This will allow for low temps to bottom out in the lower 20s in central/south-central Ohio to upper 20s near/west of the I-75 corridor where the wind may pick up a bit late in the near term period, allowing temps to plateau during the predawn hours. 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.
158 AM EDT Sat Apr 3 2021 High pressure will maintain fair weather across our region through midday today. A weak warm front will cross our region later today and tonight with a few light rain showers, that may mix with a few wet snowflakes later tonight. Mostly clear skies will continue this morning as a ridge of high pressure drifts east across the eastern Great Lakes. A warm front approaching our region late this afternoon and overnight will bring chances for rain showers late in the day across Western NY. The increasing cloud cover tonight, combined with the passage of the warm front will bring temperatures much closer to normal, with lows in the 30s. This will afternoon highs in check and mostly in the low to mid 50s.
As of early this morning, wind speeds were pretty light, under high pressure. The lowest winds today should be to the east of the Valley. A weak cold front will pass through the FA tonight. This should keep winds up in most locations in the 5 to 15 mph range, with the lowest values once again east of the Valley.
235 AM EDT Sat Apr 3 2021 High pressure will shift to the east on Saturday. This will allow for low temps to bottom out in the lower 20s in central/south-central Ohio to upper 20s near/west of the I-75 corridor where the wind may pick up a bit late in the near term period, allowing temps to plateau during the predawn hours. 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.
317 AM CDT Sat Apr 3 2021 Early this morning temperatures across the area were similar to this time yesterday morning with lows so far in the low to mid 40s. The most notable changes were at Lake Charles and Beaumont where temperatures were 3 degrees and 5 degrees cooler respectively. A weak upper disturbance was noted in the GFS model and confirmed with Satellite across New Mexico with some mid clouds spilling over the weak upper level ridge across east Texas. Dry weather is expected to continue Saturday and Sunday as the airmass remains too dry for anything but perhaps some virga across the extreme western part of southeast Texas due to weak impulses generating out of the weak upper short wave trough that will be slowing moving in central Texas from New Mexico.
420 AM EDT Sat Apr 3 2021 High pressure will shift to the east today offering sunny weather conditions.
High pressure will slide east through the day followed by a broad area of low pressure moving in from the west. The gradient between the two will produce some southerly breezes before the winds shift to the northwest behind the inverted trough. Given the clear skies and ridge aloft also bumped up temps again today maintaining the 20 degrees or more above average pattern. Another broad area of weak low pressure moves in on Sunday. The ridge becomes a bit more zonal over the northern plains but with H85 temps in the mid to upper teens Celsius, temperatures should climb once again.
1121 PM MDT Fri Apr 2 2021 06Z TAF CYCLE Weakening upper low to move over NM and will be located over se NM by 04/00Z.
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. High temperatures on Sunday are forecast in the low 70s.