Aikyam-Lab/Synoptic-Bench huggingface dataset:
923 PM EST WED FEB 11 2015 COLD FRONT CURRENTLY MOVING THROUGH NORTHERN GA. UPPER TROUGH DIGGING THROUGH THE GREAT LAKES AND OHIO VALLEY WILL PUSH A DRY FRONT INTO THE SOUTHEAST THURSDAY. BUFR SOUNDINGS ARE PRETTY DRY ALOFT /ABOVE 850MB/ BUT WITH INCREASED NORTHWEST FLOW AND TEMPERATURES ALL BELOW FREEZING CANNOT RULE OUT A FEW FLURRIES AT THE HIGHER ELEVATIONS OF THE NORTH GEORGIA MOUNTAINS UPSTREAM OF THE RIDGELINES.
411 AM CST SAT JAN 31 2015 (Today and Tonight) An upper low spinning over southern California and the northern Baja early this morning will continue to split from its parent upper trough through today. The separated upper low will drift south down the Baja Peninsula through tonight while the upper trough moves over West Texas and eastern New Mexico. Lows tomorrow morning will only be slightly cooler than the afternoon highs, in the mid 40s over the Big Country and the lower 50s over the southern CWA.
700 AM EST SAT JAN 31 2015 AVIATION LOW PRESSURE MOVING OUT OF THE PLAINS TOWARD THE OHIO VALLEY LATER TODAY WILL BRING A SWATH OF SNOW THROUGH SOUTHERN LOWER MICHIGAN.
652 AM EST SAT JAN 31 2015 HIGH PRESSURE WILL REMAIN ACROSS THE AREA TODAY KEEPING CONDITIONS DRY.
AN UPPER LOW CENTERED ACROSS SOUTHERN NEVADA WILL MOVE SOUTH INTO NORTHWEST MEXICO THIS EVENING.
916 AM EST SAT JAN 31 2015 HIGH PRESSURE BUILDS TODAY FOR A SUNNY BUT CHILLY DAY.
PAST FEW TEXAS TECH WRF RUNS HAVE BEEN SHOWING A BREAK IN THE WX UNTIL THE COLD FRONT ITSELF MOVES INTO SE TX EARLY SUNDAY AFTN.
606 AM CST Sat Jan 31 2015 Lower Pacific moisture was streaming into the nation's midsection this morning in advance of a large upper level low centered over the Desert Southwest. We think this will continue to saturate the lower trop, setting up additional rainfall later this afternoon. Areas along and north of Interstate 44 will experience the best chances for measurable rain today, with the lower chances in far south central Missouri. A cold front will shift across the region on Sunday, cooling temperatures sufficiently for a brief change over to snow.
350 AM PST SAT JAN 31 2015 UPDATED AVIATION AND MARINE DISCUSSION HIGH PRESSURE WILL BUILD OVER THE AREA THIS WEEKEND. BRINGING DRY AND WARMER CONDITIONS TO THE AREA ALONG WITH SOME LOCAL OFFSHORE WINDS.
THE FOG IN THE LOWER WITH VISIBILITIES OF 1 MILE OR BETTER, SO THE DENSE FOG ADVISORY WAS CANCELLED. RAIN AND SNOW WILL CONTINUE OVER THE LOWER ELEVATIONS OF THE FOUR CORNERS AND THE CENTRAL VALLEYS. THE SOUTHWEST LOW PRESSURE CENTER LOOKS TO BE POSITIONED OVER THE SOUTHERN CORNER OF NV EARLY THIS MORNING. THE LOW HAS BEEN RESPONSIBLE FOR PUMPING THE MOISTURE INTO INTO THE SOUTHWEST CONUS. THIS LOW WILL BEGIN TO DROP SOUTHWARD TODAY. EXPECT THAT TEMPS WILL BE JUST A TAD COOLER TODAY. OVERNIGHT LOW TEMPERATURES WILL ALSO BE A LITTLE COOLER DUE TO THE DRIER AIR MASS. THE NORTHWEST FLOW RELAXES ON SUNDAY AS A WEAK RIDGE EMBEDDED IN THE FLOW PASSES OVER THE AREA.
305 AM PST SAT JAN 31 2015 WIDELY SCATTERED LIGHT SHOWERS FROM A WEAK LOW PRESSURE SYSTEM OVER THE SOUTHWEST STATES WILL END THIS MORNING WITH GUSTY NORTH WINDS NEAR THE COASTAL FOOTHILLS. WESTERN RIVERSIDE AND SOUTHWESTERN SAN THE WEAK CLOSED LOW PRESSURE SYSTEM OVER THE SOUTHWEST STATES AND NORTHERN BAJA WILL MOVE TOWARD THE SOUTHEAST TODAY. HIGH PRESSURE ALOFT WILL BE CENTERED NEAR THE WEST COAST. N-NE WINDS WITH SFC GUSTS TO 20-30 KT DEVELOPING ALONG THE RIDGES OF THE SAN BERNARDINO MTNS.
Temperatures will remain above freezing so no wintry precipitation is expected. This precipitation is occurring in the moist conveyor belt ahead of a large upper level low pressure system centered across western Arizona. There could even be some isolated thunderstorms this afternoon near the Rio Grande River where instability will increase ahead of the upper low. By tonight through Sunday night the upper level low pressure system is progged to split. The southern portion will become the remains of the upper low and move south into Mexico while the northern portion transitions into a trough. Precipitation chances will be on the decrease with the best chance across mainly areas south of the Pecos River in west Texas east of the upper level trough axis.
THE MOST SIGNIFICANT SNOWFALL WILL BE ACROSS THE HIGHEST PEAKS. EXPECT MUCH COOLER DAYTIME TEMPERATURES THIS WEEKEND.
AN UPPER LEVEL TROF WILL APPROACH FROM THE W AND BRING LOWERING CIGS AND WIDESPREAD RAINFALL TO THE TERMINALS BEGINNING LATE TONIGHT. A BROAD UPPER TROUGH EXTENDED FROM THE NORTHERN ROCKIES TO THE DESERT SOUTHWEST. THE HIGH WILL CONTINUE TO DRIFT SLOWLY EAST TO THE ATLANTIC BY SUNDAY AS THE SYSTEM OUT WEST DIGS INTO MEXICO. IN THE LOWER LEVELS. WHEN THE NORTHERN PORTION OF THE WESTERN TROUGH BREAKS OFF AND MOVES ACROSS OKLAHOMA AND NORTH TEXAS. THIS WILL BRING A COLD FRONT SOUTHWARD INTO THE REGION SUNDAY AFTERNOON. THE TROUGH AND FRONT WILL EXIT EAST OF THE AREA SUNDAY NIGHT NIGHT.
WITH LOW TEMPERATURES IN THE LOWER 60S. A ROBUST HIGH PRESSURE CELL CENTERED OVER THE EASTERN UNITED STATES MAINTAINED A CONTINENTAL NORTH TO NORTHEASTERLY TRAJECTORY INTO THE FLORIDA KEYS. HIGH TEMPERATURES SHOULD REACH THE LOWER 70S MOST AREAS. REMAINING OFFSHORE OVER WARMER WATERS. A HIGH PRESSURE SYSTEM WILL BUILD EASTWARD OVER THE WESTERN NORTH ATLANTIC OCEAN THIS AFTERNOON THROUGH SUNDAY.
THE WIND WILL TURN TO THE NORTHWEST AFTER SUNRISE SUNDAY WITH THE PASSAGE OF A COLD FRONT. THE PRECIP SHOULD ALSO SHUT OFF FASTER SUNDAY AS THE ACCOMPANYING COLD FRONT DRIES OUT THE LOWER LEVELS.
This precipitation is occurring in the moist conveyor belt ahead of a large upper level low pressure system centered across western Arizona. There could even be some isolated thunderstorms this afternoon near the Rio Grande River where instability will increase ahead of the upper low. By tonight through Sunday night the upper level low pressure system is progged to split. The southern portion will become the remains of the upper low and move south into Mexico while the northern portion transitions into a trough. Precipitation chances will be on the decrease with the best chance across mainly areas south of the Pecos River in west Texas east of the upper level trough axis.
TODAY THROUGH SUNDAY NIGHT UPPER LEVEL ANALYSIS HAS UPPER LOW ACROSS THE SOUTHWEST CONUS WITH NORTHWEST FLOW ACROSS THE NORTHERN CONUS. BACK-DOOR COLD FRONT IS CURRENTLY DROPPING SOUTH ACROSS SOUTH DAKOTA. UPPER RIDGE SHIFTS SOUTHEAST AS CUT-OFF LOW DEVELOPS ACROSS THE SOUTHWEST CONUS. SURFACE COLD FRONT AND STRATUS DECK WILL CONTINUE TO DROP SOUTHWEST ACROSS THE WESTERN SOUTH DAKOTA PLAINS. COOLER AIR WILL FILTER INTO THE AREA BEHIND THE FRONT. IN THE LOWER 40S. WEAK UPPER RIDGE BUILDS ACROSS THE ROCKIES WITH SKIES BECOMING MOSTLY SUNNY LATE IN THE DAY.
EXPECT STRENGTHENING HIGH PRESSURE WITH DRY AND WARM WEATHER AFTER TODAY. AN UPPER LEVEL LOW PRESSURE CENTER IS SEEN ON WATER VAPOR IMAGERY NEAR LAS VEGAS THIS MORNING.
514 AM EST SAT JAN 31 2015 HIGH PRESSURE BUILDS TODAY FOR A SUNNY BUT CHILLY DAY.
COLD FRONT WILL ENTER NORTHERN AND WESTERN PORTIONS OF OKLAHOMA OVERNIGHT.
ABOVE THE VALLEYS SKIES ARE MOSTLY CLEAR AND SUNNY WX IS EXPECTED ALL DAY AS HIGH PRESSURE ALOFT REMAINS STRONG. ON SUNDAY THE UPPER RIDGE WILL FLATTEN AND CLOUDS WILL INCREASE IN MOIST WESTERLY FLOW ALOFT.
INVERSION AND HIGH PRESSURE SURFACE/ALOFT WILL WEAKEN SUNDAY. THE WEAKENING RIDGE WILL ALLOW FOR SNOW LIKELY ACROSS THE WEST CENTRAL MOUNTAINS /RAIN BELOW 4K FT MSL/ AND A CHANCE OF RAIN AND SNOW ALONG AND NW OF A LINE FROM BANNER SUMMIT TO BOGUS BASIN THROUGH CAMBRIDGE TO BURNS /AS WELL AS STEENS MTN/.
HIGH PRESSURE WILL CONTROL THE WEATHER OVER THE ARKLAMISS TODAY INTO TONIGHT WITH SEASONABLE TEMPERATURES EXPECTED. BUT DEVELOPING MOISTURE TRANSPORT AHEAD OF AN APPROACHING COLD FRONT WILL RESULT PARTICULARLY OVER THE ARKLAMISS DELTA REGION. SHOWERS AND A FEW THUNDERSTORMS WILL INCREASE OVER THE FORECAST AREA SUNDAY AHEAD OF THE STRENGTHENING COLD FRONT. THE LOW-MID LEVEL LAPSE RATES ARE ABOUT AS POOR AS WE WILL SEE WITH AN EXTRATROPICAL CYCLONE. OF GREATER CONFIDENCE WILL BE THE ONSET OF STRONG COLD ADVECTION BEHIND THE COLD FRONT AS WE GO THROUGH SUNDAY NIGHT.
AT KDHT AND KGUY A GRADUAL IMPROVEMENT IN CEILINGS SHOULD OCCUR THIS AFTERNOON WITH A RETURN TO VFR CONDITIONS THIS EVENING AROUND THE TIME THAT A COLD FRONT MOVES THROUGH. THIS WARM NOSE WILL ONLY GET DEEPER AND WARMER TODAY. A NORTHERN STREAM SHORT WAVE TROUGH WILL PASS BY TO OUR NORTH SENDING A COLD FRONT THROUGH THE AREA EARLY SUNDAY MORNING.
/ISSUED 414 AM EST SAT JAN 31 2015/ LATEST REGIONAL ANALYSIS CONTINUES TO SHOW A STRONG 1033MB HIGH NORTH OF THE LOCAL AREA OVER THE OHIO VALLEY WITH RIDGING SW THROUGH THE TENNESSEE VALLEY AND LOWER MISSISSIPPI RIVER VALLEY.
903 AM EST SAT JAN 31 2015 HIGH PRESSURE CONTINUES TO BUILD SOUTH ACROSS THE LOCAL AREA WITH SOME CIRRUS CLOUDS STREAMING ACROSS IN WESTERLY FLOW ALOFT.
/ISSUED 411 AM CST SAT JAN 31 2015/ (Today and Tonight) An upper low spinning over southern California and the northern Baja early this morning will continue to split from its parent upper trough through today. The separated upper low will drift south down the Baja Peninsula through tonight while the upper trough moves over West Texas and eastern New Mexico. Lows tomorrow morning will only be slightly cooler than the afternoon highs, in the mid 40s over the Big Country and the lower 50s over the southern CWA.
COLD FRONT MOVING INTO NORTHERN MONTANA THIS MORNING BUT NOT VERY ARCTIC LIKE WITH TEMPERATURES ONLY DOWN TO 18 DEGREES AT CALGARY. STILL EXPECT THIS STRATUS TO GET CLOSE TO A BAKER TO MILES CITY LINE BY SUNRISE AND SOME PATCHES OF FREEZING FOG ARE EXPECTED. BIGGER THREAT IS THE SNOW FALLING ON WARM ROADS AND MELTING AND FREEZING. SUNDAY THE AIRMASS MODERATES AS THE DEEPER COLD AIR MOVES AWAY FROM THE REGION WITH A WARM FRONT MOVING INTO THE WESTERN ZONES BY LATE AFTERNOON AND ACROSS THE AREA SUNDAY NIGHT. MOST OF THE DAY WILL BE DRY BUT THE WARM FRONT DOES INCREASE MOISTURE OVER THE WESTERN ZONES WHICH WILL BRING A CHANCE FOR MOUNTAINS SNOW.
634 AM EST SAT JAN 31 2015 HIGH PRESSURE WILL BE OVER THE AREA TODAY AND TONIGHT. THE HIGH WILL BE OFF THE SOUTHEAST COAST SUNDAY.
A COLD FRONT WILL APPROACH FROM THE NORTHWEST TONIGHT AND RAIN CHANCES WILL INCREASE MAINLY LATE IN THE PERIOD.
1051 AM EST TUE JAN 27 2015 LOW PRESSURE OFF THE COAST OF SOUTHERN NEW ENGLAND WILL CONTINUE TO MOVE NORTHEAST. HIGH PRESSURE OVER THE MISSISSIPPI VALLEY WILL BUILD INTO THE CAROLINAS THROUGH WEDNESDAY.
HIGH PRESSURE PUSHING EWD OVER THE GULF WILL MAINTAIN A LIGHT AND VARIABLE WIND. AN UPPER LVL RIDGE IS LOCATED ACROSS THE CENTRAL SECTIONS OF THE COUNTRY WHILE AN UPPER TROUGH IS ALONG THE EAST COAST. AT THE SURFACE, A WEAK REINFORCING RIDGE WILL BUILD IN AND MOVE INTO THE SE STATES THROUGH TODAY AND TONIGHT PROLONGING THE TRANQUIL AND WARM CONDITIONS. THIS RIDGE WILL VEER THE LIGHT WINDS FROM WEST THIS MORNING TO EAST BY WED MORNING.
FREEZING RAIN POSSIBLE IN SALMON LATE THIS EVENING. Moisture will move in with the low that will mainly impact Lemhi County and southwest Montana. The cold air trapped in Salmon has the potential to bring significant impacts due to a mix of freezing rain and snow. There is agreement between model guidance that the precipitation will start off as rain so this increases the confidence that freezing rain will occur mainly late this evening and overnight.
816 AM EST TUE JAN 27 2015 STRONG LOW PRESSURE WILL CONTINUE TO TRACK NORTHEAST OFF THE NEW ENGLAND COAST THROUGH TONIGHT.
UPPER AIR ANALYSIS SHOWED THE MAIN TROUGH AXIS FROM HUDSON BAY TO NORTHEAST CONUS. NORTHWEST FLOW FROM NORTHERN PLAINS TO SOUTHEAST CONUS AND RIDGE AXIS FROM TEXAS TO NORTHWEST CONUS. SEVERAL DISTURBANCES ON THE BACK SIDE OF THE MAIN TROUGH WILL MAINTAIN THE TROUGH POSITION ALONG THE EAST COAST THROUGH EARLY WEDNESDAY.
VFR CONDITIONS TO PREVAIL THE NEXT 24 HOURS AS HIGH PRESSURE AT THE SURFACE AND ALOFT REMAIN ANCHORED OVER SOUTH TEXAS. DEEP SOUTH TEXAS REMAINS IN BETWEEN THE TWO UPPER LARGE UPPER TROUGHS THAT ARE DOMINATING BOTH THE WESTERN AND EASTERN COASTS. UPPER RIDGE SITS OVER HEAD AND IS FORECAST TO STRENGTHEN TODAY AS THE WESTERN TROUGH DEEPENS SLIGHTLY.
SKIES WILL CLEAR LATE IN THE DAY AS HIGH PRESSURE BUILDS INTO LOWER MICHIGAN WITH THESE CONDITIONS CONTINUING THROUGH TONIGHT AS WINDS BECOME ESSENTIALLY LIGHT AND VARIABLE. WEATHER WILL CONTINUE OVER THE AREA AS HIGH PRESSURE SETTLES SOUTH INTO THE AREA ON BACKSIDE OF MAJOR STORM LIFTING UP THE NORTHEAST COAST. TEMPERATURES WILL REMAIN BELOW AVERAGE AS HIGHS ONLY CLIMB INTO THE LOWER TO MIDDLE 20S BY AFTERNOON. THIS WILL COMBINE WITH LIGHT WINDS ASSOCIATED WITH THE HIGH TO PRODUCE RATHER DECENT RADIATIONAL COOLING. THE BAJA LOW HAS SIMTULTANEOUSLY BEGUN TO OPEN UP AND HELP ERODE THE RIDGE POSITIONED OVER THE WESTERN UNITED STATES.
GETTING REPORTS OF FREEZING DRIZZLE IN ADDITION TO THE SNOW. CHATTANOOGA AIRPORT, TN 46 27 49 33 / 10 0 0 10 KNOXVILLE MCGHEE TYSON AIRPORT, TN 38 21 44 29 / 20 0 0 10 OAK RIDGE, TN 39 23 44 29 / 20 0 0 10 TRI CITIES AIRPORT, TN 36 16 39 23 / 40 10 0 10 TN.
927 AM EST TUE JAN 27 2015 LIGHT SNOW AND FLURRIES WILL PERSIST TODAY BEFORE HIGH PRESSURE BUILDS AND DECREASES CLOUDS TONIGHT.
856 AM EST TUE JAN 27 2015 STRONG LOW PRESSURE WILL CONTINUE TO TRACK NORTHEAST OFF THE NEW ENGLAND COAST THROUGH TONIGHT.
512 AM CST TUE JAN 27 2015 FOR 12Z TAFS /ISSUED 212 AM CST TUE JAN 27 2015/ UPPER JET CORE OF 130-140KT DIVING SE THRU THE REGION THIS MORNING WILL SHIFT EWD TODAY ALLOWING A RIDGE AXIS TO SHIFT INTO THE MS, OH AND TN VALLEY ON WEDNESDAY.
IT WILL BE CLOUDY WITH A SLIGHT CHANCE OF A LIGHT SHOWER THIS MORNING MAINLY OVER THE HIGHER TERRAIN. A LITTLE WARMER AND BREEZIER WEDNESDAY. THEN A LITTLE CLOUDIER AND COOLER FOR THE END OF THE WEEK. A RIDGE BUILDS IN OVER THE WEEKEND. WITH SANTA ANA WINDS AND WARMER TEMPERATURES. A 565 DM UPPER LOW SITS ATOP OF SANTA BARBARA COUNTY EARLY THIS MORNING. THE MAIN VORT LOBE ASSOC WITH THIS LOW IS MOVING THROUGH SBA AND SLO COUNTY AND THIS WILL BRING A SLIGHT CHC OF LIGHT SHOWERS TO THE AREA THIS MORNING. THIS AFTERNOON THE SHOWERS WILL BE CONFINED TO THE INTERIOR SECTIONS AND EVEN THEN MOSTLY JUST THE HIGHER TERRAIN. A QUICK LITTLE POP UP RIDGE MOVES OVER THE AREA WEDNESDAY AND HGTS MOVE UP TO ABOUT 576 DM.
942 AM EST TUE JAN 27 2015 COOL AND DRY HIGH PRESSURE IS IN PLACE ACROSS THE AREA THIS MORNING WITH MOSTLY CLEAR SKIES AND N/NW FLOW.
1001 AM EST TUE JAN 27 2015 LOW PRESSURE OFF THE COAST OF SOUTHERN NEW ENGLAND WILL CONTINUE TO MOVE NORTHEAST. HIGH PRESSURE OVER THE MISSISSIPPI VALLEY WILL BUILD INTO THE CAROLINAS THROUGH WEDNESDAY.
HIGH PRESSURE WILL BEGIN TO MOVE INTO THE AREA LATER TODAY.
THE LOW CLOUDS EXTEND ALL THE WAY DOWN INTO EASTERN SD AND SOUTHERN MN AND MODELS SHOW A SOUTHERLY WIND TRAJECTORY ALL DAY. SPEEDS DO PICK UP THOUGH SO THERE IS SOME HOPE OF SCOURING OUT THE LOW CLOUDS AS THEY APPEAR FAIRLY THIN. BEFORE AN UPPER LEVEL TROF SAGS OVER THE AREA BY THE WEEKEND.
340 AM PST TUE JAN 27 2015 IT WILL BE CLOUDY WITH A SLIGHT CHANCE OF A LIGHT SHOWER THIS MORNING MAINLY OVER THE HIGHER TERRAIN. A LITTLE WARMER AND BREEZIER WEDNESDAY. THEN A LITTLE CLOUDIER AND COOLER FOR THE END OF THE WEEK. A RIDGE BUILDS IN OVER THE WEEKEND. WITH SANTA ANA WINDS AND WARMER TEMPERATURES. A 565 DM UPPER LOW SITS ATOP OF SANTA BARBARA COUNTY EARLY THIS MORNING. THE MAIN VORT LOBE ASSOC WITH THIS LOW IS MOVING THROUGH SBA AND SLO COUNTY AND THIS WILL BRING A SLIGHT CHC OF LIGHT SHOWERS TO THE AREA THIS MORNING. THIS AFTERNOON THE SHOWERS WILL BE CONFINED TO THE INTERIOR SECTIONS AND EVEN THEN MOSTLY JUST THE HIGHER TERRAIN. A QUICK LITTLE POP UP RIDGE MOVES OVER THE AREA WEDNESDAY AND HGTS MOVE UP TO ABOUT 576 DM.
745 AM EST TUE JAN 27 2015 LIGHT SNOW AND FLURRIES WILL PERSIST TODAY BEFORE HIGH PRESSURE BUILDS AND DECREASES CLOUDS TONIGHT. ALBEIT A QUICK INCH TO THE HIGHER RIDGES AND AREAS ARND DUBOIS. FRIGID HIGH PRESSURE TONIGHT WILL BREAK OUT STRATUS AND ALLOW FOR LOWS TO REACH THE SINGLE DIGITS WITH READINGS BELOW ZERO POSSIBLE ACROSS THE FAR NORTH.
255 AM PST TUE JAN 27 2015 HIGH CLOUDS WITH INTERVALS OF MID-LEVEL CLOUDS CONTINUE TO MOVE STEADILY NORTHWARD THIS MORNING AHEAD OF A DISSIPATING LOW PRESSURE SYSTEM CENTERED IN SOUTHERN CALIFORNIA THAT IS MOVING NORTHEASTWARD INTO THE GREAT BASIN. TEMPERATURES ARE FORECAST TO COOL SIGNIFICANTLY ABOVE THE FORECAST AREA TODAY DUE TO THE EFFECTS OF THIS LOW MOVING OVERHEAD.
940 AM EST TUE JAN 27 2015 A TROUGH OF LOW PRESSURE OVER NORTHWEST PENNSYLVANIA WILL DISSIPATE TODAY.
The best precip chances will be over the high Sierra where 1-2 inches of snow will fall above 6000 feet. Showers will begin to taper off by this evening as the low lifts northward through the Great Basin.
501 AM EST TUE JAN 27 2015 LIGHT SNOW SHOWERS AND FLURRIES WILL REMAIN TODAY BEFORE HIGH PRESSURE DECREASES CLOUDS TONIGHT. EARLY MORNING UPDATE TO CANCEL ADVISORY FOR THE RIDGES WITH ONLY AN INCH OR SO HAVING FALLEN OVERNIGHT WITH AN INCH OR LESS EXPECTED REST OF DAY. AREA OF LIGHT SNOW IN WEAKENING DEFORMATION ZONE CONTINUES ACROSS THE RIDGES. STILL SOME LOWER VSBY IN SNOW IN THE SOUTHERN RIDGES AND A FLUFFY INCH OR TWO STILL POSSIBLE INTO THE LATE MORNING HOURS. FRIGID HIGH PRESSURE TONIGHT WILL BREAK OUT STRATUS AND ALLOW FOR LOWS TO REACH THE SINGLE DIGITS WITH READINGS BELOW ZERO POSSIBLE ACROSS THE FAR NORTH.
THE HIGHS YESTERDAY AND OTHER RECENT WARM DAYS SUGGEST THE SCRIPT SHOULD BE TO HIT THE HIGH SIDE OF THE GUIDANCE ENVELOPE IF NOT HIGHER. TOMORROW SHOULD BE A LITTLE WARMER THAN TODAY IN MOST AREAS. EXCEPT THE NORTHEAST WHERE A LATE AFTERNOON ARRIVAL OF THE COLD FRONT WILL BE POSSIBLE.
AN UPPER LOW CURRENTLY CENTERED ALONG THE SOUTHERN CA COASTLINE WILL CONTINUE TO FILL AND WEAKEN TODAY AS IT LIFTS NORTHEAST THROUGH THE GREAT BASIN. THE ASSOCIATED MID LEVEL TROUGH AXIS IS CURRENTLY SWEEPING NORTHWARD ACROSS AZ/SOUTHEAST CA. THE REMNANTS OF THE AFOREMENTIONED UPPER LOW AND ASSOCIATED DEEPER MOISTURE ARE FORECAST TO GENERALLY LIFT UP AND OVER THE TOP OF THE FORECAST AREA TONIGHT INTO WEDNESDAY MORNING WITH THE GREATEST CHANCE FOR PRECIPITATION REMAINING NORTH OF THE FORECAST AREA. MID LEVEL RIDGING WILL BRIEFLY FOLLOW THIS WAVE BRINGING A DOWNWARD TREND IN PRECIPITATION WEDNESDAY AFTERNOON INTO WEDNESDAY EVENING. 06Z GFS JUST VIEWED HAS TRENDED TOWARDS PREVIOUS RUNS OF THE ECMWF REGARDING POSITIONING/EVOLUTION OF THE UPPER LOW LATE IN THE WEEK.
639 AM EST TUE JAN 27 2015 LOW PRESSURE OFF THE COAST OF SOUTHERN NEW ENGLAND WILL CONTINUE TO MOVE NORTHEAST. A PRESSURE RIDGE IN THE MISSISSIPPI VALLEY WILL BUILD INTO THE CAROLINAS THROUGH WEDNESDAY.
RIDGE UP THE ROCKIES AND A BROAD-DEEP CYCLONE IMPACTING THE NORTHEAST. RELATIVELY FLAT HIGH PRESSURE STRETCHES FROM THE WESTERN GULF OF MEXICO TO THE WESTERN GREAT LAKES. SEVERAL SPOKES OF ENERGY ASSOCIATED WITH THE DEEP CYCLONE HAVE CARVED OUT WEAK SURFACE BOUNDARIES ACROSS THE SOUTHEASTERN UNITED STATES AND THE ATLANTIC BIGHT. TEMPERATURES RANGE FROM 60 TO 68 AND DEWPOINTS ARE IN THE LOWER 50S. NORTHWEST TO NORTH BREEZES WILL FRESHEN LATE TONIGHT WITH THE PASSAGE OF A REINFORCING COLD FRONT.
CYCLONIC H50 FLOW PREVAILS OVER THE NEXT H24 AS A VORT LOBE ROTATES THROUGH THE LARGE ERN CONUS TROUGH/CUTOFF LOW.
425 AM CST TUE JAN 27 2015 UPPER RIDGING. AS THIS RIDGE AXIS TRAVELS ACROSS THE CENTRAL U.
HIGH CLOUDS HAVE OVERSPREAD THE REGION AHEAD OF AN UPPER LOW TRACKING NORTH FROM BAJA. CLOUD COVER HAS DONE LITTLE TO STOP THE DEVELOPMENT OF DENSE FOG ACROSS SOUTHEAST OREGON AND THE LOWER SNAKE RIVER PLAIN IN IDAHO. THE UPPER LOW CONTINUES NORTHWARD TODAY. AS THE LOW TRACKS INTO EASTERN ID TUESDAY NIGHT LIGHT PRECIPITATION WILL SPREAD FURTHER NORTH AND EAST. PRECIPITATION TAPERS OFF WEDNESDAY MORNING AND SKIES WILL LIKELY CLEAR ENOUGH OVER SE OREGON AND THE LOWER TREASURE VALLEY TO ALLOW FOR FOG TO REDEVELOP. TEMPERATURES TODAY ARE COOLER THAN YESTERDAY BUT WILL REMAIN ABOVE NORMAL THROUGH WEDNESDAY.
505 AM PST TUE JAN 27 2015 HIGH CLOUDS WITH INTERVALS OF MID-LEVEL CLOUDS CONTINUE TO MOVE STEADILY NORTHWARD THIS MORNING AHEAD OF A DISSIPATING LOW PRESSURE SYSTEM CENTERED IN SOUTHERN CALIFORNIA THAT IS MOVING NORTHEASTWARD INTO THE GREAT BASIN. TEMPERATURES ARE FORECAST TO COOL SIGNIFICANTLY ABOVE THE FORECAST AREA TODAY DUE TO THE EFFECTS OF THIS LOW MOVING OVERHEAD.
DEEP SOUTH TEXAS REMAINS IN BETWEEN THE TWO UPPER LARGE UPPER TROUGHS THAT ARE DOMINATING BOTH THE WESTERN AND EASTERN COASTS. UPPER RIDGE SITS OVER HEAD AND IS FORECAST TO STRENGTHEN TODAY AS THE WESTERN TROUGH DEEPENS SLIGHTLY.
746 AM PST TUE JAN 27 2015 Areas of low clouds and fog will persist across portions of Inland Northwest as high pressure remains in place.
AS THE LOWER ATMOSPHERE MIXES. SO ANTICIPATE CU TO BEGIN DEVELOPMENT IN THE LOWER END OF THAT RANGE. AS LOW PRESSURE PULLS AWAY TO THE NORTHEAST AND HIGH PRESSURE BUILDS FROM THE WEST.
1000 AM EST TUE JAN 27 2015 LOW PRESSURE OFF THE COAST OF SOUTHERN NEW ENGLAND WILL CONTINUE TO MOVE NORTHEAST. HIGH PRESSURE OVER THE MISSISSIPPI VALLEY WILL BUILD INTO THE CAROLINAS THROUGH WEDNESDAY.
1012 AM EST TUE JAN 27 2015 STRONG LOW PRESSURE WILL CONTINUE TO TRACK NORTHEAST OFF THE NEW ENGLAND COAST THROUGH TONIGHT.
MAINLY IN THE MID TO UPPER 50S ON THE EASTERN PLAINS WITH LOWER 60S ACROSS MUCH OF THE REST OF THE LOWER ELEVATIONS. THE QUIET AND WARM WEATHER WILL GIVE WAY TO ANOTHER LOW PRESSURE SYSTEM MOVING OUT OF THE GREAT BASIN AND INTO WYOMING TONIGHT THROUGH TOMORROW AFTERNOON. EXPECT TEMPERATURES TO BE COOLER. AS THE LOW PRESSURE SYSTEM DEPARTS WEDNESDAY AFTERNOON AND OVERNIGHT.
800 AM PST TUE JAN 27 2015 Areas of low clouds and fog will persist across portions of Inland Northwest as high pressure remains in place.
254 AM PST TUE JAN 27 2015 A LOW PRESSURE SYSTEM WILL PUSH NORTH INTO THE SIERRA AND WESTERN NEVADA AND BRING PERIODS OF LIGHT VALLEY RAIN AND MOUNTAIN SNOW SHOWERS THROUGH TUESDAY.
THE PERIOD WILL BEGIN WITH A ZONAL FLOW STRETCHED ACROSS THE CONUS BETWEEN A LOW PRESSURE CENTER IN THE GULF OF ALASKA. A FLAT RIDGE WILL SIT BETWEEN THESE TWO FEATURES AND ACROSS OUR REGION.
WITH TEMPS IN THE LOWER 80S. NORTHERLY WINDS WILL USHER COOLER AND DRIER AIR TO THE REGION. A COLD FRONT WILL CROSS THE COASTAL WATERS FRIDAY NIGHT.
WE SHOULD SEE SOME LIGHT SHOWERS MOVE INTO NORTH CENTRAL MN BEHIND A SECONDARY COLD FRONT. AS HIGH PRESSURE BUILDS INTO THE NORTHLAND. HIGH TEMPERATURES WILL BE MUCH COOLER. THE UPPER PATTERN WILL TRANSITION FROM AN UPPER LOW OVER HUDSON BAY RESULTING IN NORTHWEST FLOW OVER THE REGION.
ZONAL MID LEVEL FLOW WILL CONTINUE OVER SOUTH TEXAS AS A SHORT WAVE TROUGH TRACKS EAST OUT OF THE GREAT BASIN AND ACROSS THE CENTRAL PLAINS INTO THE MIDWEST IN SUPPORT OF A COLD FRONT MOVING INTO NORTH TEXAS FRIDAY MORNING. THE SURFACE FRONT WILL ADVANCE SOUTH THROUGH THE SHORT TERM WHILE THE SUPPORTING TROUGH CONTINUES EAST.
1232 PM CDT THU APR 2 2015 STRONG HEATING IS OCCURRING IN LLANO COUNTY AND VICINITY WITH TEMPERATURES ALREADY IN THE LOWER 80S. UPPER AIR ANALYSIS LAST EVENING SHOWED A SHALLOW TROUGH OVER EASTERN TEXAS AND ZONAL FLOW FARTHER WEST. THE UPPER PATTERN WILL BE ZONAL THROUGH THIS PERIOD WITH A BROAD RIDGE BULGING UP FROM MEXICO AND A BROAD TROUGH MOVING THROUGH THE CENTRAL PLAINS. FRIDAY A COLD FRONT WILL DROP DOWN FROM THE NORTH MOVING THROUGH OUR CWA DURING THE AFTERNOON.
335 PM CDT THU APR 2 2015 THE FIRST OF A COUPLE OF SHORT WAVE TROUGHS IS MOVING THROUGH THE PLAINS ON WATER VAPOR IMAGERY. HIGH PRESSURE SHOULD BUILD THROUGH THE ROCKIES INTO THE PLAINS. WEAK UPPER LEVEL RIDGING BUILDS OVER TX TOMORROW AS A COLD FRONT ADVANCES S INTO THE AREA. THINK THIS IS MORE LIKELY GIVEN WEAK RIDGING ALOFT AND CAPPING INVERSION DUE TO ELEVATED MIXED LAYER.
TEMPERATURES THE PERIOD WILL BEGIN WITH A ZONAL FLOW STRETCHED ACROSS THE CONUS BETWEEN A LOW PRESSURE CENTER IN THE GULF OF ALASKA. A FLAT RIDGE WILL SIT BETWEEN THESE TWO FEATURES AND ACROSS OUR REGION.
345 PM CDT THU APR 2 2015 CURRENT SURFACE ANALYSIS PLACES LOW OVER ONTARIO WITH SECONDARY COLD FRONT PUSHING THROUGH THE NORTHERN PLAINS. MODEST WARM AIR ADVECTION WILL BRING WARMER TEMPERATURES TO THE AREA.
QUIET WEATHER CONTINUES TONIGHT AHEAD OF ANOTHER COLD FRONT. HAVE COLD FRONT TIMING FRIDAY NIGHT.