Aikyam-Lab/Synoptic-Bench huggingface dataset:
WV imagery indicates weak ridging aloft transitioning eastward across the Central Rockies into the Western High Plains. Near the surface, a lee side trough of low pressure is slowly strengthening in eastern Colorado. Between high pressure to the SE and a High Plains lee trough, there will be a decent pressure gradient across the FA. There will be a light downslope SSW wind through the overnight, so lows near the Oklahoma border may not fall much from freezing. On Saturday, lee troughing will prevail. Winds will be a bit breezy though as the trof axis continues across western Kansas.
High cloudiness Saturday as cirrus rides up and over transitory upper ridging.
However, breezy north winds and a building 1035mb ridge toward the Deep South will allow for cool readings today. With clear skies tonight across Central Alabama and winds tapering down as the ridge settles in over Tennessee, look for even cooler readings tonight. During Saturday, the ridge center weakens and pushes east toward the Carolinas. With another full day of sunshine in store across Alabama, look for milder readings as our cold air advection will be cut off with the exiting ridge.
High pressure will begin to weaken today over western Montana and central Idaho as a disturbance moves through the region.
204 AM MST Fri Feb 21 2020 Upper ridge over Montana this morning will be flattened somewhat this afternoon by a weak wave.
Dry and mild weather will continue through Saturday as high pressure remains in control.
854 AM EST Fri Feb 21 2020 High pressure will maintain dry conditions, with moderating temperature through the weekend. Plenty of sunshine will be seen during the day as a sprawling area of high pressure builds into the Ohio Valley. High temperatures will moderate as compared to yesterday with the departure of the 850mb thermal trough, but values will still end up a few degrees below climatology. That large high pressure center will slowly drift southeast through the weekend, with low-level ridging remaining in place.
with low dew points and clear skies temperatures will fall into the upper 20s across central Louisiana with freezing temperatures as far south as the I-10 corridor around sunrise tomorrow.
636 AM CST Fri Feb 21 2020 Weak cold front is across North Dakota into southern Manitoba propagating southeast. Still anticipating no impacts from this feature, and temperatures climbing to near or slightly above freezing given low level westerly flow. The region is currently (09z) in the warm sector of a northern system with the thermal ridge overhead. This thermal ridge will advect southward this morning as a weak cold front propagates through the region by 15z. Will go with daytime highs near or slightly above freezing, with the possibility for even warmer temperatures.
Canadian high pressure was centered directly over southern Missouri, allowing temperatures to fall well into the teens. Highs on Saturday will reach the 50s as an upper level ridge of high pressure builds directly over the nations midsection.
331 AM CST Fri Feb 21 2020 Today and Tonight: Southern stream flow will remain in place across the CONUS through the short term period with a trough axis pushing off the East Coast and into the Atlantic while a cutoff closed upper-level low is progged to move into southern California. A ridge axis will reside between these two features and remain situated upstream over the Rockies with northwest flow aloft over the ArkLaMiss. Winds will gradually relax through the day as the aforementioned ridging slides into the area. Overnight low temperatures were lowered into the low to mid 20s with the coldest readings expected across northeast portions of the area in favored locations for efficient cooling.
/issued 200 AM CST Fri Feb 21 2020/ Low clouds/fog (some freezing) are pushed up into the mtns this morning with a stout e-se 850 mb wind. The low-level moisture starts to decrease above 700 mb and with cold temps in the moist layer and a se wind low-level component into the afternoon said clouds/fog/freezing fog will probably hang around through mid morning, thus the extension of the freezing fog advisory for GDP/Delaware/Davis Mtns until 15Z. A better warming signal is seen for Sat when the column warms (mid-level ridge) and surface pressures fall.
345 AM CST Fri Feb 21 2020 Cold high pressure is building into the region. Temps will run well below normal today with highs in the lower 40s. High pressure will slip a east on Saturday with dry weather prevailing.
Favored warmer guidance values in snow free areas, with the exception of downstream from deeper snow pack.
Very Windy/Gusty and Much Cooler Today. East central Florida is currently sandwiched in between a strong cold front now across south Florida and a strong 1041 mb high pressure centered across OK/MO/AR. Strong northerly surge behind the cold front will produce very hazardous boating conditions across the coastal waters today into tonight.
220 AM MST Fri Feb 21 2020 Zonal westerly flow aloft will bring a quiet weather pattern for the next few days, with plenty of sun and warmer temperatures. Chambers Gap winds near Livingston will likely shut off by Saturday night as cooler temperatures and high pressure moves into the area.
549 AM EST Fri Feb 21 2020 High pressure will maintain clear skies this forecast. Southwest flow around the northern fringe of this high will persist through the entire forecast with gusts into the 20-25 knot range peaking during strongest diurnal mixing this afternoon. Mid-level warm advection is well underway with the departure of yesterday's thermal trough and will continue through the day, particularly as WSW flow aloft increases in response to deep low pressure pivoting across Hudson Bay. Uninhibited insolation will aid diurnal boundary layer growth allowing temperatures to climb into the low 30s by late afternoon as 850mb temps begin a slow ascent toward 0C by the end of the first period. Fairly static w/wsw mid- level flow regime will maintain steady transport of moderate air from the High Plains into Southeast Michigan.
514 AM CST Fri Feb 21 2020 Latest upper air analysis shows ridging over the rockies pushing into our region over the next day or two. At the surface, high pressure slides southeastward this morning and we're experiencing some breezy WAA keeping temps from dropping too much from radiational cooling.
/issued 345 AM CST Fri Feb 21 2020/ Cold high pressure is building into the region. Temps will run well below normal today with highs in the lower 40s. High pressure will slip a east on Saturday with dry weather prevailing.
Continued dry conditions today with warmer temperatures.
Weak trof in place over ern portions of our area is supporting a decent pressure gradient over the Black Hills, aiding in breezy conds over the hills and portions of the foothills, where some 40-45 mph gusts have developed overnight. A little cooler midlevel air on Saturday coupled with low-level WAA and clear skies will favor even warmer max temps.
508 AM EST Fri Feb 21 2020 High pressure will maintain dry conditions, with moderating temperature through the weekend. Plenty of sunshine will be seen during the day as a sprawling area of high pressure builds into the Ohio Valley. High temperatures will moderate as compared to yesterday with the departure of the 850mb thermal trough, but values will still end up a few degrees below climatology. That large high pressure center will slowly drift southeast through the weekend, with low-level ridging remaining in place.
926 AM EST Fri Feb 21 2020 High pressure building across the northeast will bring clearing skies and milder temperatures to NY and PA this weekend. Building high pressure will cause skies to clear today, especially during the afternoon. As winds shift to the south on the back side of the high pressure system Saturday, temperatures will rise to near 40 degrees along the NY/PA border.
624 AM EST Fri Feb 21 2020 Cold high pressure will build into the forecast area from the northwest today.
342 AM CST Fri Feb 21 2020 (Today and Tonight) Quiet, dry weather for the next 24 hours with cooler than normal temperatures. as upper level ridging moves over the area. We may see some mid/upper level clouds riding over the ridge move in over our area, but otherwise mostly sunny skies. However, we will remain cooler than normal with winds just turning around to the south late in the day.
543 AM CST Fri Feb 21 2020 High pressure will sink south of Illinois today allowing southwest winds to bring warmer air into central Illinois.
Expecting clear skies across the area tonight and Saturday as High pressure builds in from the NW and will dominate the weather pattern through the weekend.
The combination of clear skies and calm winds will allow temperatures to drop well below freezing tonight, with readings in the middle to upper 20s.
1105 AM EST Fri Feb 21 2020 Satellite imagery and surface observations place a cold front very near Key West at this time. The leading edge of the cold front pushed through Pulaski Shoal over an hour ago, with a wind shift to the north-northwest and winds sustained at 22 knots gusting to 27 knots. Overnight lows will range from the lower to mid 60s. A cold front will blast through the coastal waters of the Florida Keys over the next few hours.
Expect these conditions to continue through the day, with cool high temperatures ranging from the low 40s across the delta to low 50s in the Pine Belt region. /15/ Prior discussion below: Today and Tonight: Southern stream flow will remain in place across the CONUS through the short term period with a trough axis pushing off the East Coast and into the Atlantic while a cutoff closed upper-level low is progged to move into southern California. A ridge axis will reside between these two features and remain situated upstream over the Rockies with northwest flow aloft over the ArkLaMiss. Winds will gradually relax through the day as the aforementioned ridging slides into the area. Overnight low temperatures were lowered into the low to mid 20s with the coldest readings expected across northeast portions of the area in favored locations for efficient cooling.
Latest upper air analysis shows ridging over the rockies pushing into our region over the next day or two. At the surface, high pressure slides southeastward this morning and we're experiencing some breezy WAA keeping temps from dropping too much from radiational cooling.
Dewpoint temperatures are as low as the single digits across SW VA to the lower 20s southeast Tennessee. Saturday much warmer temperatures with dry airmass and light winds.
100 PM EST Fri Feb 21 2020 High pressure building across the northeast will bring clearing skies and milder temperatures to NY and PA this weekend. Temperatures peak in the upper 30s across most of the area, and into the low 40s across the valleys. A weak ripple moving through northern NY may bring in some clouds north of the Thruway, which could cause temperatures to ocomein slightly warmer - but dry weather will continue. Temperatures Saturday night should come in a couple degrees warmer compared to the previous night, but lows still hover in the 20s under clear skies.
The quiet pattern continues through Saturday afternoon as a low amplitude upper level ridge transitions east across the Western High Plains into the Central Plains. Although temperatures will not be quite as cold tonight, they are still expected to drop below freezing by early Saturday morning regardless of a west-southwesterly flow across western Kansas.
1123 AM CST Fri Feb 21 2020 High pressure will dominate Illinois through the start of the weekend.
The deep layer trough over the state is allowing high pressure to build into the Mississippi Valley. This is a cold high pressure and the north winds around the system is advecting cold air southward. Below freezing temperature are likely for Northern Levey County. The duration of the freeze is marginal but apparently there is some planting going on in the area and freezing temperatures will have an impact. All other areas should stay above freezing tomorrow morning.
1234 PM EST Fri Feb 21 2020 High pressure drifts slowly to the south of the area through Saturday.
Very dry air aloft is reaching the surface in the higher elevations (i. RMS Zonal westerly flow aloft will bring a quiet weather pattern for the next few days, with plenty of sun and warmer temperatures. Chambers Gap winds near Livingston will likely shut off by Saturday night as cooler temperatures and high pressure moves into the area.
Should be a quiet one as high pressure over the region slowly shifts to the east overnight/early tomorrow morning. High cloudiness Saturday as cirrus rides up and over transitory upper ridging.
243 PM EST Fri Feb 21 2020 Water vapor imagery highlights a short wave sliding east through Florida, ahead of a ridge axis translating east through the southern Plains. Temperatures topped out near 80 this morning and have since fallen into the lower 70s. Strong north to northeast breezes will drive a much cooler air mass through the Keys overnight. Lows Saturday morning will reach the lower to mid 60s, not quite as cold as they could get because coastal waters north of the island chain are pretty mild for this time of year. Northeast breezes will diminish somewhat Saturday with highs only reaching the lower 70s.
1236 PM EST Fri Feb 21 2020 Cold high pressure will build into the forecast area from the northwest today.
300 PM EST Fri Feb 21 2020 Dry and increasingly warmer conditions will be on tap into this weekend with highs in the 40s and lows in the 20s.
Latest visible satellite showing clear skies as strong cold high pressure settles over the region. High pressure at the surface is building into Tennessee valley.
203 PM EST Fri Feb 21 2020 Cold high pressure will build into the forecast area from the northwest today.
253 PM CST Fri Feb 21 2020 (Tonight and Saturday) Dry and quiet weather will continue across West Central Texas through Saturday, with short wave ridging aloft dominating. Cloud cover will result in a bit warmer temperatures tonight, with overnight lows in mid and upper 30s. Temperatures will be considerably warmer tomorrow but still slightly below normal, with afternoon highs mainly in the lower 60s.
1221 PM EST Fri Feb 21 2020 High pressure will maintain dry conditions, with moderating temperature through the weekend. Plenty of sunshine will be seen during the day as a sprawling area of high pressure builds into the Ohio Valley. High temperatures will moderate as compared to yesterday with the departure of the 850mb thermal trough, but values will still end up a few degrees below climatology. That large high pressure center will slowly drift southeast through the weekend, with low-level ridging remaining in place.
324 PM EST Fri Feb 21 2020 High pressure will maintain dry conditions, with moderating temperature through the weekend.
355 PM EST Fri Feb 21 2020 Sunny, dry, and mild through the weekend with high pressure building across the region. Temperatures peak in the upper 30s across most of the area, and into the low 40s across the valleys. A weak ripple moving through northern NY may bring in some clouds north of the Thruway, which could cause temperatures to come in slightly warmer - but dry weather will continue. Temperatures Saturday night should come in a couple degrees warmer compared to the previous night, but lows still hover in the 20s under clear skies. A very quiet period with a light westerly flow at all levels and a ridge building off the east coast.
245 PM CST Fri Feb 21 2020 High pressure moved south of the area today as southwest winds brought warmer, more moist air to the area. This afternoon, the entire area was above freezing, leading to melting snow.
High temperatures Saturday will be warmer, ranging from 57 to 60 degrees, or 5 to 9 degrees below normal.
1202 PM CST Fri Feb 21 2020 High pressure is well southeast of the area today, allowing for increasing low level southwest flow. Temperatures will respond by warming into the low/mid 30s, although given the brisk winds, it won't feel "warm. " Given winds in the 20-25 mph range with gusts into the lower 30s from west into south central MN, patchy blowing snow will be possible as well.
1202 PM EST Fri Feb 21 2020 Expansive high pressure area stretching from Texas to New England will gradually weaken as it pushes into the Southeast on Saturday.
1132 AM CST Fri Feb 21 2020 The main issue in the short term is with the highs for today and Saturday. A weak upper level ridge starts to move into the area today and should help to bring warmer, drier conditions to the area, so did warm up temperatures slightly across southwest Nebraska. Did adjust temperatures cooler than guidance across portions of north central Nebraska extending back into the Sandhills, where satellite still shows a good swath of snow on the ground.
The quiet pattern continues through Saturday afternoon as a low amplitude upper level ridge transitions east across the Western High Plains into the Central Plains. Although temperatures will not be quite as cold tonight, they are still expected to drop below freezing by early Saturday morning regardless of a west-southwesterly flow across western Kansas. On Saturday, lee troughing will prevail. Winds will be a bit breezy though as the trof axis continues across western Kansas.
249 PM CST Fri Feb 21 2020 Temperatures this afternoon have warmed into the low-30s with some mid-30s sprinkled in spots (mainly south and the Twin Cities metro). Friday night lows will cool into the low to mid teens. Both the EC/GFS support an upper low moving out of the desert southwest, east-northeast across the central part of the country.
The ridge gets flattened this period with zonal flow taking place across the northern U.
Temperatures this afternoon have managed to get above freezing, but not by much, as most locations hover around the mid to upper 30s. Very dry air has been noted with this high, as dewpoints range from single digits to teens across southern IN and central KY. Clear skies, light winds, and dry air will promote very efficient radiational cooling as lows dip into the lower 20s and upper teens. Tomorrow, the high will continue to drift eastward, and we'll begin to see surface flow transition to the southwest. Temperatures will also rebound into the low 50s for many spots with southwesterly flow and clear skies in place.
1211 PM EST Fri Feb 21 2020 High pressure brings a very dry weekend. This should yield a decent ridge/valley split in low temperatures Saturday morning as southwesterly flow begins to increase across the ridgetops with valleys remaining calm through daybreak. Undercut ridgetops slightly vs central guidance and trended toward/below MOS significantly undercutting central guidance for the more protected valleys. Net result will be mid-upper teens across Lowland ridges and low teens across valleys and mountains. Undercut central guidance dew points significantly in the mountains Saturday afternoon with near 30C dewpoint depressions just above ridgetop height. Dew points in the teens across the Lowlands and subzero in the mountains will yield minimum RHs values Saturday afternoon in the mid 20s/teens respectively, but given relatively weak flow, do not anticipate any fire weather concerns.
Latest visible satellite showing clear skies as strong cold high pressure settles over the region. High pressure at the surface continues to slide into the Tennessee valley bringing a much drier airmass.
High Quiet period continues as an elongated ridge of high pressure becomes oriented over the southeast US. Meanwhile a low pressure system will move into Manitoba by later in the period setting up some low level troughing across WI Saturday night.
TFJ Upper ridge over Montana this morning will be flattened somewhat this afternoon by a weak wave.
High pressure aloft will maintain dry and stable conditions across Utah through tonight.
347 PM EST Fri Feb 21 2020 Sunny, dry, and mild through the weekend with high pressure building across the region. Temperatures peak in the upper 30s across most of the area, and into the low 40s across the valleys. A weak ripple moving through northern NY may bring in some clouds north of the Thruway, which could cause temperatures to come in slightly warmer - but dry weather will continue. Temperatures Saturday night should come in a couple degrees warmer compared to the previous night, but lows still hover in the 20s under clear skies.
Mostly sunny and a little warmer today with no chance of precipitation.
Cold front has pushed through the area with the main weather story being the much cooler temperatures (well below normal for this time of year) across the region. Further south for our Florida counties high temperatures will be in the low to mid 50s. As high pressure spills into the region, conditions will be breezy through the day with 10 to 15 mph winds and occasional gusts up to 25 mph through the day out of the north and northeast.
242 PM CST Fri Feb 21 2020 High pressure will dominate Illinois through the start of the weekend.
1120 AM CST Fri Feb 21 2020 Something we don't see all that often at any time of year - an expanse of clear skies all throughout the region, with really the only feature of interest over the Lower 48 being a departing snow event over the Carolinas/southeastern Virginia. Closer to home, low level ridging rules the roost but continues to slide into the Mid Mississippi River Valley, with a tighter pressure gradient developing across the local area north of that feature. That setup will result in increasingly gusty conditions today, but with better mechanical mixing also delivering warmer conditions, though with gusts to 25+ mph at times, it might not feel all that warm.
High pressure and dry air sprawled all over the region will provide VFR conditions all sites this forecast cycle.
217 PM EST Fri Feb 21 2020 High pressure brings a very dry weekend.
245 PM CST Fri Feb 21 2020 High pressure will anchor over the OH River and TN River Valleys tonight, and subsidence will lead to calming winds and clear skies. Expect low temps in the low 20s to perhaps even teens in a few locations. High pressure will slowly shift to the east on Saturday, and temperatures will warm gradually through the weekend as southerly flow returns to the area.
336 PM EST Fri Feb 21 2020 High pressure building across the northeast will bring clearing skies and milder temperatures to NY and PA this weekend. Temperatures peak in the upper 30s across most of the area, and into the low 40s across the valleys. A weak ripple moving through northern NY may bring in some clouds north of the Thruway, which could cause temperatures to come in slightly warmer - but dry weather will continue. Temperatures Saturday night should come in a couple degrees warmer compared to the previous night, but lows still hover in the 20s under clear skies.
1128 AM EST Fri Feb 21 2020 Cold high pressure will build into the forecast area from the northwest today.
The high for Saturday will still be below normal and in the upper 50s to low 60s. The southeasterly winds will bring in warmer and more moist air to the region, as keep overnight low temperatures mild and in the upper 40s to low 50s.
1100 AM CST Fri Feb 21 2020 Canadian high pressure centered from the Ohio Valley through the Mid-South/Ozarks to the srn Plains and a nwrly flow aloft behind a departing trof axis has delivered a very dry airmass to the forecast area, resulting in clear skies and cool late February temperatures. Inherited grids/zones had this covered nicely, although I did have to nudge down dewpoints, especially over the nern 1/4 of the forecast area where readings were already down to the lower 20s. Strong northerly winds will gradually weaken through the day as the center of cold high pressure advances closer to the area. with low dew points and clear skies temperatures will fall into the upper 20s across central Louisiana with freezing temperatures as far south as the I-10 corridor around sunrise tomorrow.