Aikyam-Lab/Synoptic-Bench huggingface dataset:
614 AM CDT Sat May 30 2020 Early this morning, a broad anticyclone was centered over the southern Canadian Plains downstream of an amplifying upper level ridge over the western CONUS. The upper level ridge will continue to build eastward over the next several days, dominating the weather across the middle Mississippi Valley. As the high continue to push eastward, surface winds will gradually transition to the east while the lobe of warm air advection to the west of the high builds into western MO. BSH The anomalously strong upper ridge will build into the central portion of the CONUS as we move into the work week.
/issued 326 AM CDT Sat May 30 2020/ Short Term [Today and Sunday] This morning's water vapor satellite imagery indicates an upper level trough extends from the Great Lakes southwestward into the Lower Mississippi River Valley. As the Gulf breeze moves inland, it could produce enough forcing for ascent to trigger additional convection inland, with the highest chances across southeastern Acadiana. The upper level trough will exit the region this evening and upper level heights are expected to rise over the CWA during the day Sunday. This will result in warmer and drier conditions on Sunday.
For the overnight hours, moisture in the lower and mid-levels will increase, resulting in SCT-BKN clouds in the 5-7k range developing early Sunday morning. The latest water vapor satellite loop shows an upper low currently centered over the interior of northern Mexico near 24. On the eastern side of this low, high level cloud cover continues to move northward into south central Texas. It will take some time for the low-levels to moisten today, so we will keep the forecast rain free through early this afternoon.
533 AM EDT Sat May 30 2020 Expect cooler and less humid conditions this weekend.
1035 AM EDT Sat May 30 2020 A cold front will move through the region this afternoon.
634 AM CDT Sat May 30 2020 Another cooler than normal day on tap as Canadian high pressure settles into the area. High pressure settles over the area tonight with clear skies. The high begins to slide east into the Great Lakes region Sunday, setting up warm air advection over our area. Should also see some increase in high clouds going into the afternoon ahead of a warm front moving northeastward out of the Plains.
High pressure aloft will help warm temperatures to between 10 and 20 degrees above normal through the weekend. High pressure ridge axis currently directly over the area will gradually shift east, allowing for mostly sunny skies and very warm temperatures today with highs well into the 80s to near 90 degrees for lower elevations. A disturbance moving north on the upstream side of the ridge will cross the area quickly this evening. However, lingering subsidence from the ridge and only marginal moisture will likely hinder thunderstorm development. Any storms that develop will be high- based given meager moisture profiles in the lower levels.
509 AM EDT Sat May 30 2020 Dry conditions and cooler temperatures can be expected this weekend. Temperatures will be cooler in the wake of yesterday's front.
1047 AM EDT Sat May 30 2020 Currently - The Keys remain on the southwestern tail of an surface through lower level Atlantic ridge. Short Term Update - Lower level ridging will continue to dominate local weather. Weak ridging to our north will maintain light to gentle southeast to south breezes across the Keys and surrounding waters.
In general, inland locations have the highest probability of seeing storms today.
High pressure today will result in relatively light winds as well as dry conditions. Cloud cover will become reinforced and then spread across the rest of the area on Sunday as southerly return flow sets up thanks to departing high pressure. Cloud cover should help limit high temperatures, but an upper-level ridge will shift across the Northern High Plains, bringing warmer air along with it.
The low level jet is beginning to veer off and weaken. The low level jet is a bit stronger than the models suggest. The low level jet will redevelop tonight producing at least some additional shower and thunderstorm activity across ncntl Nebraska.
/issued 344 AM CDT Sat May 30 2020/ (Today and Tonight) Early this morning, water vapor satellite imagery shows a southwestward moving upper low far south of our region in Mexico, while an upper level ridge expands over the 4 Corners Region and into West Texas. Other than some high clouds associated with the northern edge of the upper low, skies are clear across West Central Texas. Ridging aloft and in the low levels will result in dry weather and clear to mostly clear skies today and tonight. Some strengthening of the 850mb thermal ridge will likely bring a few degrees of warming today, with highs in the mid to upper 80s today and lows tonight in the upper 50s to low 60s.
849 AM CDT Sat May 30 2020 Quiet weather continues this morning with high pressure centered over southern Manitoba. The h500 trough that kept temperatures cool the past few days is finally moving out of the our region, and temperatures will start their move slowly higher as an h500 ridge axis moves to western North Dakota by tonight. After some early patchy frost in the Turtle Mountains and in the southwest this morning, temperatures will rise into the lower 70s west, and the mid 60s east.
448 AM MDT Sat May 30 2020 Generally dry conditions are expected today with continued warmer temperatures as an upper ridge builds into the region. Southeast winds will continue to increase as the lee trof to the west strengthens and a Lake Wind Advisory is in effect for Fort Peck Lake today. The upper ridge and lee trof will be moving east on Sunday and isolated thunderstorm development is possible in the afternoon and evening. VFR as high pressure over the region keeps conditions quiet today.
These storms are developing in response to residual outflow boundaries, as well as increasing lift associated with pieces of short wave energy now emanating from a vigorous trough currently over the western CONUS. Periods of showers & perhaps a few thunderstorms may persist well into the night with several ripples in the flow along the edge of the ridge helping provide focus for additional shower/ thunderstorm development. The dirty ridge remains in place with numerous ridge-runner disturbances aloft.
Current surface map places high pressure across the eastern Dakotas, with stationary front backed up against the Rockies. keeping temperatures near the lower end of guidance. Ridge shifts a bit east for Sunday, with instability axis located from the Nebraska panhandle through the Black Hills into eastern Montana. Upper level ridge slowly flattens through the week.
257 PM MDT Sat May 30 2020 many storms were noted over the higher terrain early this afternoon, while over the large valleys and plains skies were generally mostly sunny. max temps tomorrow will be a 2-3F cooler than today, but it still will be hot across the region.
246 PM MDT Sat May 30 2020 Current satellite imagery shows storms continuing to build over the higher terrain with west winds bringing them over the foothills and into the western portions of the plains. For Sunday, an upper level trough will push through in the morning with increasing southwesterly to westerly flow behind it. This will dry out the low levels with model soundings showing inverted-V signatures nearing 500 mb and DCAPE values above 1000 J/kg. CAM output has been fairly consistent with diurnal convection starting over the higher terrain and pushing east during the late afternoon hours with gusty winds being the main threat. Highs will be slightly warmer than today with temperatures reaching into the upper 80s across the plains and 50s to 60 in the high country.
As the upper ridge amplifies out west the upper flow will become increasingly northwest overnight.
At 500 mb, there was an impressive closed low with 12 hour height falls of at least 170 meters moving into CA. Thermal ridge at 700 mb extended from AZ into UT. Surface analysis early this afternoon showed a ridge of high pressure from southern Manitoba into IA, with low pressure back over CO. A warm front stretched from parts of MT and WY into northeast CO, then east/southeast across KS. Look for highs Sunday ranging from the lower 80s in our western zones to lower and mid 70s in southwest IA.
955 AM PDT Sat May 30 2020 A deep trough moving into California will bring thunderstorms to northern California, and a breezy, cooler day to southern California today.
121 PM CDT Sat May 30 2020 One more day of quiet weather is anticipated Sunday as an upper level ridge of high pressure remains the dominant feature.
There is little instability so have the dry forecast, but have a little concern for warm advection over a warm front that is over the southern part of the forecast area. The ridge will continue to move into the area on Sunday. Skies should continue to clear and with south winds and warm advection the temperatures are expected to be warmer.
Spokes of energy associated with a low pressure circulation to the west are moving into the region today. Shower chances will linger into Sunday afternoon with temperatures around 20 degrees cooler than today with breezy winds.
Hooley Warmer temperatures are expected this weekend with many areas seeing their warmest of the spring thus far. Isolated to widely scattered thunderstorms are expected over the mountain and foothills today, but confidence is low if they will affect the plains as progged soundings are showing a very strong cap in place over the plains thanks to strong E/SE winds and warm air at the mid levels as upper ridge shifts over our region. BT Ridge breaking cool front moves across Sunday and shifts the focus of storms to the eastern plains, mainly from Rosebud County eastward where low level convergence and higher dewpoints will be in place ahead of the frontal passage.
A large ridge will slide in from the Dakotas and build over Eastern Conus now through Sunday.
231 PM EDT Sat May 30 2020 Quiet and cool weather will persist into tonight and Sunday as high pressure builds in.
Issued by National Weather Service Rapid City SD 322 PM CDT Sat May 30 2020 Water vapor imagery shows strong upper ridging across the central to northern High Plains, with NW flow aloft continuing across the CWA. from the mid 60s over Holt and Boyd counties to the lower 80s across Chase and Hayes counties. The upper ridge and thermal ridge centered over the central to northern Rockies will slide eastward across western and central Nebraska tomorrow.
High pressure ridge dominates the central portion of the surface map this morning. with the Miss River Valley on the eastern side of the ridge. and the low pops across the southeast will remain in the forecast. Temperatures will be in the lower to mid 80s across the north to the mid to upper 80s in the south under plenty of sunshine. Overnight lows drop into the lower 60s and some upper 50s will also be possible.
317 PM CDT Sat May 30 2020 High pressure has brought beautiful weather to eastern Iowa and northwest Illinois. Lows will range from the lower 40s in the NE to the lower 50s far southwest. The comfortable temps and low humidity continue for Sunday with highs in the low 70s on average, which is about 5 degrees below normal.
The ridge over the intermountain region will gradually propagate east to the Northern Plains, and flatten a bit.
302 PM EDT Sat May 30 2020 Currently - Surface winds are gentle out of the east to southeast due to an Atlantic ridge reaching into Florida. Meanwhile moderate lower to mid level ridging remains near our area. A swath of increased lower level moisture is working its way westward across our area and is contributing to isolated to widely scattered showers on waters west of the Lower Keys. Despite expected weak to no inhibition, the weakness of the flow and some dry air through the lower levels, expect slight chance for showers and thunderstorms through this period.
210 PM EDT Sat May 30 2020 High pressure dominates the weekend. A high pressure system will continue to build into the area with a light north/northwesterly flow.
236 PM EDT Sat May 30 2020 As the short term period begins, relatively dry northwesterly flow is building in across north Georgia behind a weak cold frontal boundary, which remains positioned across south-central Georgia.
1221 PM CDT Sat May 30 2020 The quiet pattern continues through the early part of Saturday, as surface ridging makes it presence. By this afternoon and evening a warm front will likely form across northwest Missouri, with temperatures along and south of the front in the upper 70s, and temperatures north of the front hovering around 70. Sunday will be a transition day between the cooler pattern that's been in place for a majority of May thus far and what looks to be a wholesale warm up for the early part of the upcoming week.
An upper level ridge impinging on Texas retreats a bit north as an upper level low over northern Mexico inches north a bit. 00 inches in the aftn and no capping should yield fairly high rain chances over area with the higher rain chances over mainly the southern half of the area. High temperatures on Sunday will be cooler SW with clouds and rain and warmer to the NE closer to the upper ridge.
This region will shift north and eastward through the morning, as the low tracks towards Mt. Shower and storm activity will be on the increase during the morning hours as the low approaches the Pacific Northwest. As the low moves in, look for showers and the chance for thunderstorms with gusty winds and heavy rain.
240 PM EDT Sat May 30 2020 The Ohio Valley remains under the front of an upper ridge. This drier air will keep the region dry and cooler through the short-term. Temperatures will drop to the low 50s for most. Expect high temperatures will range from the low to mid 70s.
Lows tonight will sink several degrees below average, into the low and mid 50s.
We've seen plenty of sunshine today with clear skies as well as high pressure dominates the region.
For Sunday, the ridge will remain across South Florida with another sea breeze driven convective day with a little more moisture being advected into the region ahead of a frontal boundary moving into North Florida. A meridional flow pattern should prevail across North America featuring amplified troughing along both coasts and expansive surface ridging migrating from the Ohio Valley towards the eastern Carolinas.
A warm front extends from around Atwood and Oberlin to Goodland and Tribune. Isolated to scattered thunderstorms will be possible along and west of the warm front through this evening before dissipating.
Expect overnight lows to be in the lower to mid 50s. The GFS is suggesting chances for afternoon showers in far southeastern SD, northwestern IA, and northeastern NE, which would be occurring along the axis of positive theta-e advection in the low-level jet. The sun could peek out a couple times behind the clouds, but mostly cloudy skies are expected with afternoon temperatures maxing out in the lower-mid 70s.
This morning convection did two things: they added a lot more moisture to the lower levels of the atmosphere (67 dewpoint in Tri Cities!), but they also have kept us very cool this morning.
An upper level low currently over northern Mexico will slowly track north on Sunday. Isolated to scattered showers and thunderstorms are possible Sunday, with the highest rain chances along the Interstate 10 corridor.
Lee trough/warm front from central MT into northeast CO. Thermal ridge over topping cloud cooled air producing 100-150J/kg MLCIN over northeast WY with about 500J/kg MLCAPE. Brief TCU/TS over the highest terrain of the Black Hills also possible early. Sunday, upper/thermal ridge builds into the CWA. Stratus on the western SD plains will erode in the afternoon as solar insolation takes hold along eastward moving warm front. If the warm front doesn't head east, could be a huge bust in high temperatures east of the Black Hills.
A 591 dam anticyclone will move along the spine of the Rockies today. This high will not be going anywhere anytime soon per the models. Do expect your typical diurnal convection to pop off the higher terrain of Colorado. Since the ridge will be nearly overhead, do not expect this activity to progress across the Kansas state line tonight. The above mentioned ridge will sit firmly over the Sunflower state for the next several days and not move. Long range models are still showing the potential for the ridge to flatten out mid week.
South-southeast flow aloft ahead of an upper low to our west will lead to another day of record/near-record temps this afternoon, especially in the Treasure Valley where 90s to around 100F are expected. Winds will ramp up through the afternoon ahead of an approaching cold front. Surface winds: mostly SE 10-20 kts, increasing to 20-30 kts this afternoon ahead of and near a cold front. Winds aloft near 10k ft MSL: S 25-45 kts, turning SW behind the cold front.
203 PM CDT Sat May 30 2020 Pleasant weather will continue for a couple more days, as high pressure slides across the Great Lakes.
145 PM CDT Sat May 30 2020 A pleasant weekend is still on tap as an upper level ridge continues to move in and build over the area.
TFJ Generally dry conditions are expected today with continued warmer temperatures as an upper ridge builds into the region. Southeast winds will continue to increase as the lee trof to the west strengthens and a Lake Wind Advisory is in effect for Fort Peck Lake today. The upper ridge and lee trof will be moving east on Sunday and isolated thunderstorm development is possible in the afternoon and evening. VFR as high pressure over the region keeps conditions quiet today, but winds will be brisk from the SE.
244 PM CDT Sat May 30 2020 Weather conditions will be tranquil tonight as a continental high pressure system settles into the region. Northerly winds will continue across our region as the high pressure system moves southward through the Upper Midwest. For the short term portion of the forecast our region will be dominated by the continental high pressure system as it moves from the Midwest to a position off the Carolina Coast.
127 PM CDT Sat May 30 2020 18Z TAFs are VFR CAVOK through Sunday afternoon as upper ridging takes place to suppress most convection.
An upper level trough continues to slide away from the Southeast today while an upper level ridge quickly builds into the central portion of the CONUS on its heels. We begin to dry out after sunset this evening with a rain-free forecast overnight through Sunday as ridging builds in from the west. Another hot day is on tap for Sunday with highs topping out in the low 90s everywhere south of the Hwy 84 corridor.
Another favorable area for convection this evening will be over interior se Ga ahead of an approaching cold front.
1219 PM CDT Sat May 30 2020 Another cooler than normal day on tap as Canadian high pressure settles into the area. High pressure settles over the area tonight with clear skies. The high begins to slide east into the Great Lakes region Sunday, setting up warm air advection over our area. Should also see some increase in high clouds going into the afternoon ahead of a warm front moving northeastward out of the Plains.
1252 PM CDT Sat May 30 2020 There is some Cu out across mainly southern sections of the area this afternoon along with some brief, gusty east to northeast winds under high pressure.
205 PM CDT Sat May 30 2020 Dry, benign weather conditions will continue tonight and Sunday with upper level high pressure overhead and moisture shunted away from the area. Solutions are in decent agreement showing these storms making only limited eastward propagation due to the unfavorable upper level ridge and lack of low level inflow or instability.
338 PM EDT Sat May 30 2020 A secondary cold front will cross the area late tonight into Sunday morning.
The upper ridge will build farther east over Oklahoma on Sunday. Winds will continue southeast to south and temperatures will be a bit warmer on Sunday.
A large ridge will slide in from the Dakotas and build over Eastern Conus now through Sunday. /Tame weather to start, with an opportunity for some changes later in the week/ Early week begins with, at the upper levels, a NW/SE-oriented ridge axis reaching through the central Gulf Coast aligned between troughing over the northeastern CONUS & a low near the Texas/Mexico borderland.
Late update early this afternoon to remove rain chances in the mountains as drier air mass is settling over the region behind cold front that moved through overnight.
Will see highs a couple degrees shy of 70 for most places in the valley and eastern ND with a couple degrees cooler in lakes and trees of MN. Temps should be similar to yesterday, maybe a few degrees warmer in the low to mid 60s. Even with some mixing and weak warm air advection, the air mass is dry enough to see lows drop into the low to mid 40s tonight.
Current surface map places high pressure across the eastern Dakotas, with stationary front backed up against the Rockies. keeping temperatures near the lower end of guidance. Ridge shifts a bit east for Sunday, with instability axis located from the Nebraska panhandle through the Black Hills into eastern Montana. Upper level ridge slowly flattens through the week. Conditions will improve from west to east Sunday morning as a warm front moves through the area.
1213 PM CDT Sat May 30 2020 (Today and tonight) A building upper level ridge will keep the weekend dry and warm.
140 PM EDT Sat May 30 2020 Expect cooler and less humid conditions this weekend.
256 PM CDT Sat May 30 2020 Area of mid-level cloud cover and scattered showers have persisted across northern Missouri for much of the day, and this general trend should continue for the next 12-18 hours as a weak surface warm front lifts north and isentropic ascent remains.
1258 PM EDT Sat May 30 2020 High pressure dominates the weekend. A high pressure system will continue to build into the area with a light north/northwesterly flow. While it may be a little chilly with morning lows in the mid 40s across the Lowlands and mid 30s in the mountains, suspect many, like myself will be enjoying a couple days of open window weather.
The high amplitude ridge to the immediate east of Utah and an upstream upper low moving north-northeast through central/northern California will produce an increasingly strong and quite warm southerly flow across the Great Basin today. Critical fire weather conditions are expected across the lower elevations of west-central through extreme southern Utah due to the strong winds and low humidity. The lifting of the aforementioned California upper low north- northeast through the western Great Basin could bring convection into far northwest Utah late tonight.
Quiet weather continues this morning with high pressure centered over southern Manitoba. The h500 trough that kept temperatures cool the past few days is finally moving out of the our region, and temperatures will start their move slowly higher as an h500 ridge axis moves to western North Dakota by tonight. After some early patchy frost in the Turtle Mountains and in the southwest this morning, temperatures will rise into the lower 70s west, and the mid 60s east.
Expect inland temperatures to remain in the low 70s, while temperatures near the lake will be tampered in the low to mid 60s due to onshore flow with a lake breeze. This should result in rather chilly night, with temperatures expected to fall into the lower 40s near the WI state line, and into the mid to upper 40s elsewhere away from the city of Chicago. Temperatures are expected to be similar to those of today, with inland areas ending up around the 70 degree mark, and areas near the lake remaining in the lower 60s.