Aikyam-Lab/Synoptic-Bench huggingface dataset:
A WARM FRONT MOVING INTO NORTHERN CALIFORNIA WILL BRING A SLIGHT CHANCE OF LIGHT RAIN TO THE NORTH BAY THIS AFTERNOON. MOST OF THE ENERGY FROM THE STORM WILL LIFT NORTHWARD DUE TO UPPER LEVEL RIDGING OVER THE INTERIOR SO RAINFALL AMOUNTS REALLY DROP OFF FROM NORTH TO SOUTH. SHOWERS WILL DIMINISH WEDNESDAY NIGHT AS UPPER LEVEL RIDGING MOVES OVER THE AREA.
958 PM EST TUE JAN 12 2016 A DRY COLD FRONT WILL CROSS THE REGION OVERNIGHT.
517 PM CST TUE JAN 12 2016 ARCTIC COLD FRONT DRAPED ACROSS THE PLAINS IS STARTING TO RETREAT TO THE NORTHEAST AS A WARM FRONT. UPPER LEVEL RIDGE ACROSS THE WESTERN CONUS WITH A TROUGH ACROSS THE GREAT LAKES. RIDGE ACROSS THE WESTERN CONUS WILL SHIFT EAST WITH THE RIDGE AXIS ACROSS THE ROCKIES BY TOMORROW AFTERNOON.
A DRY COLD FRONT WILL EXIT THE REGION THIS EVENING. COLD HIGH PRESSURE WILL BUILD INTO THE CAROLINAS FROM THE WEST ON WEDNESDAY.
WILL BE SLIGHTLY COOLER TOMORROW COMPARED TO EARLIER TODAY BEFORE TEMPERATURES BEGIN TO RISE AS WE HEAD INTO THE WEEKEND. CHATTANOOGA AIRPORT, TN 23 44 29 55 / 0 0 0 0 KNOXVILLE MCGHEE TYSON AIRPORT, TN 20 38 28 52 / 10 0 0 0 OAK RIDGE, TN 19 37 28 52 / 0 0 0 0 TRI CITIES AIRPORT, TN 16 33 23 49 / 10 0 0 0.
SURFACE TROF PASSES BETWEEN 06Z AND 12Z WEDNESDAY.
VERY UNSTABLE AIR CONTINUES TO FLOOD INTO THE AREA BEHIND THE COLD FRONT THAT IS SWEEPING EASTWARD. INCOMING DRIER AIR COMBINED WITH FALLING INVERSION HEIGHTS WILL MEAN THAT THESE SNOW SHOWERS WILL CONTINUE TO WEAKEN WITH SNOW ACCUMULATION FROM THEM LIMITED TO ONLY THE RIDGES. THUS THE WINTER WEATHER ADVISORIES REMAIN ONLY IN THE RIDGES. MODEL SOUNDINGS DO INDICATE SOME SHEAR IN THE LOWEST 5 KFT WITH SURFACE FLOW TRENDING TOWARD 250 DEGREES. THE COMBINATION OF LOWER TEMPERATURES AND THE REMNANT WIND GUSTS WILL ALLOW FOR WIDESPREAD WIND CHILLS IN THE 0 TO -10F RANGE IN THE LOWER ELEVATIONS AND -10 TO -15F IN THE RIDGES. HOWEVER SHOULD SNOW END IN THE RIDGES.
IMPRESSIVE AND VERY INTENSE SNOW SQUALL BAND WITH EMBEDDED LIGHTNING PUSHING THRU THE LOWER SUSQ VALLEY AT 23Z. MINIMUM WIND CHILLS WILL BE BETWEEN 0 AND 5 ABOVE FROM THE CENTRAL RIDGES INTO THE SUSQUEHANNA VALLEY. TO BETWEEN 20 AND 25F IN THE LOWER SUSQ VALLEY.
A LARGE AREA OF HIGH PRESSURE WILL CONTINUE TO BUILD OVER THE TN VALLEY TONIGHT. HIGH PRESSURE BUILDING ACROSS THE AREA ALONG WITH A VERY DRY ATMOSPHERE. A BRIEF WARMER SPELL WAS EVIDENT WITH LOW/MID 50S FOR MUCH OF THE AREA. HIGH PRESSURE AROUND 1030MB WAS DRIVING THE FRONT SOUTHWARD. THIS RIDGE MOVING OVER A SNOW COVERED REGION FROM THE CO FRONT RANGE. NIGHT TIME LOWS SHOULD FALL INTO THE LOWER 20S FORECAST AREA WIDE. OTHERWISE UNDER SUNNY SKIES HIGHS WILL ONLY RISE INTO THE LOWER 40S. HIGH PRESSURE MOVING OVER THE REGION SHOULD BRING LIGHT WINDS.
COLD FRONT HAS PUSHED SE OF THE AREA LATE THIS EVENING AND SKIES HAVE CLEARED OUT EAST OF THE MTNS AS DRY AIR AND STRONG SUBSIDENCE OVERSPREADS STATE. ADDITIONAL ACCUMS OF 1 TO 4 INCHES APPEAR PROBABLE ACROSS THE NW MTNS /BASED ON LATEST HIGHER RES MDL OUTPUT/ WITH THE HIGHEST AMTS ACROSS THE SNOWBELT OF NW WARREN COUNTY. HAVE OPTED TO KEEP WW ADV GOING OVERNIGHT TO ACC0UNT FOR POTENTIALLY DANGEROUS WCHILLS OVR THE HIGHER TERRAIN OF CAMBRIA/SOMERSET COUNTIES. TO BETWEEN 20 AND 25F IN THE LOWER SUSQ VALLEY.
935 PM EST TUE JAN 12 2016 HIGH PRESSURE WILL BUILD IN TONIGHT.
641 PM EST TUE JAN 12 2016 HIGH PRESSURE WILL BUILD IN TONIGHT BEHIND A COLD FRONT.
801 PM EST TUE JAN 12 2016 COOL HIGH PRESSURE WEST OF THE AREA WILL ONCE AGAIN SUPPLY NEAR IDEAL RADIATIONAL COOLING CONDITIONS TONIGHT. INLAND TEMPS WILL FALL TO THE LOW 30S OVERNIGHT.
The cold front exited western KY around 18z with very little moisture to work with. The exception will again be the EVV area, where temps will have trouble reaching freezing over the snow cover.
Frontal band precip enhancing along the Nrn CA coast as a well defined vort max in the Srn portion of the Ern Pac trof approaches. The front and upper trof are forecast to move inland late tonite/Wed with the band of precip spreading into our CWA around 02z-06z Wed.
9 PM SURFACE MAP SHOWED A COLD FRONT EXTENDING FROM THE NORTHERN MEMPHIS METRO TO JUST SOUTH OF JACKSON. A COLD FRONT IS DROPPING SOUTH THROUGH THE FORECAST AREA THIS AFTERNOON SHIFTING THE WINDS FROM THE SOUTHWEST TO THE NORTHWEST. THE FRONT WILL MOVE SOUTH OF THE REGION TONIGHT WITH HIGH PRESSURE BUILDING IN BEHIND THE FRONT. THE HIGH WILL MOVE TO THE EAST OF THE REGION ON WEDNESDAY.
639 PM CST TUE JAN 12 2016 MOSTLY SUNNY AND BREEZY FOR MOST TODAY AS THE LATEST COLD FRONT WORKS ITS WAY THROUGH THE MID-STATE. AS HIGH PRESSURE PUSHES INTO THE REGION TONIGHT.
HIGH PRESSURE AND VALLEY INVERSIONS WILL REMAIN IN PLACE THROUGH WEDNESDAY. THE WEAKENING MID LEVEL RIDGE AXIS TO OUR WEST CONTINUES TO APPROACH AND WILL MOVE OVERHEAD THEN EAST OVER THE NEXT 24 HOURS. UPSTREAM OF THE RIDGE THE FIRST SHORT WAVE OF A SERIES CONTINUES TO TRANSLATE EAST ALONG 40N OFF THE NORCAL COAST.
EARLY EVENING WATER VAPOR IMAGERY CONTINUES TO REVEAL WEAK LOW PRESSURE OVER NORTHERN MEXICO. TEMPS WERE GENERALLY IN THE LOW TO MID 50S WITH LIGHT DIURNAL WINDS. WEAK RIDGING WILL BUILD OVER THE REGION BEHIND THE LOW TOMORROW WHICH WILL RESULT IN ANOTHER DAY OF NEAR NORMAL TEMPERATURES AND MOSTLY SUNNY SKIES.
PREVIOUS DISCUSSION FOLLOWS FOR VERY UNSTABLE AIR CONTINUES TO FLOOD INTO THE AREA BEHIND THE COLD FRONT THAT IS SWEEPING EASTWARD. INCOMING DRIER AIR COMBINED WITH FALLING INVERSION HEIGHTS WILL MEAN THAT THESE SNOW SHOWERS WILL CONTINUE TO WEAKEN WITH SNOW ACCUMULATION FROM THEM LIMITED TO ONLY THE RIDGES. THUS THE WINTER WEATHER ADVISORIES REMAIN ONLY IN THE RIDGES. MODEL SOUNDINGS DO INDICATE SOME SHEAR IN THE LOWEST 5 KFT WITH SURFACE FLOW TRENDING TOWARD 250 DEGREES. THE COMBINATION OF LOWER TEMPERATURES AND THE REMNANT WIND GUSTS WILL ALLOW FOR WIDESPREAD WIND CHILLS IN THE 0 TO -10F RANGE IN THE LOWER ELEVATIONS AND -10 TO -15F IN THE RIDGES. HOWEVER SHOULD SNOW END IN THE RIDGES.
DRY WEATHER WILL PERSIST KEEPING THINGS VFR THROUGH THE PERIOD WITH WINDS BECMG MORE SELY WED AS THE HIGH MOVES EAST. POTENT STORM SYSTEM MOVING INTO THE PACIFIC NORTHWEST WILL HELP DEEPEN THE NORTHERN STREAM TROUGH ACROSS THE MIDDLE AND EASTERN U. THE FIRST WILL BE AN OLD UPPER LEVEL LOW AROUND NORTHERN BAJA CALIFORNIA THAT WILL GET PICKED UP AND SHEARED OFF TO THE EAST.
336 AM CST SAT JAN 23 2016 Well, it has been a week since we have reached freezing at Kansas City and it may happen today as the warm-up begins. Sunday an upper level trough will shift east through the eastern Rockies into the central Plains. This will force an associated cold front into the area late Sunday night. Temperatures will be hovering just below freezing across northern MO allowing for freezing drizzle.
1114 PM EST FRI JAN 22 2016 HIGH PRESSURE WILL BUILD EAST ACROSS THE REGION OVERNIGHT INTO SATURDAY. LOW PRESSURE WILL TRACK SOUTH OF THE AREA LATER SATURDAY THROUGH SUNDAY. HIGH PRESSURE WILL BUILD ACROSS THE REGION OVERNIGHT WITH CLEAR SKIES. LOW PRESSURE WILL INTENSIFY OFF THE MID ATLANTIC STATES TONIGHT THEN MOVE ON AN EAST NORTHEAST TRACK INTO THE ATLANTIC SATURDAY. AT THE SAME TIME STRONG HIGH PRESSURE WILL REMAIN JUST TO THE NORTH OF THE STATE. AT THE START OF THE PERIOD THERE WILL BE A HIGH PRESSURE RIDGE BUILT OVER MAINE. WITH A COLD FRONT EXTENDING SOUTH THROUGH LAKE SUPERIOR. SUN MRNG THE LOW AND ASSOCIATED FRONT IN THE NORTH ATLANTIC CONTINUES TO MOVE EAST. THE HIGH PRESSURE RIDGE REMAINS OVER MAINE. SUN EVNG THE RIDGE MOVES EAST OF THE AREA ALLOWING THE FRONT TO MOVE INTO WRN MAINE.
A DEEP UPPER TROUGH OVER THE SOUTHERN/CENTRAL APPALACHIANS WILL MOVE EAST OF THE AREA.
328 AM EST SAT JAN 23 2016 HIGH PRESSURE WILL BUILD ACROSS THE WESTERN GREAT LAKES UPSTREAM OF THE BLOCKBUSTER SNOWSTORM ALONG THE EAST COAST.
THE BEFORE MENTIONED TROUGH WILL START TO EMERGE ONTO THE HIGH PLAINS ON SUNDAY. AND THIS WILL ALLOW FOR THE LOW TO MID LEVEL WAA TO INCREASE OVER THE AREA. SATURATION WILL INCREASE ON MON MRNG OVER THE REST OF THE CWA AS A BAND OF MID-LEVEL FRONTOGENESIS ON THE BACKSIDE OF THE PROGRESSIVE TROUGH MOVES THROUGH AND THIS WILL LIKELY ALLOW FOR A BAND OF -SN TO SWING THROUGH THE CWA.
306 AM CST SAT JAN 23 2016 THE DEEP FULLY MATURE CYCLONE HAS SHIFTED EAST TO THE MID ATLANTIC STATES THIS MORNING WITH CYCLONIC FLOW ALOFT OVER THE MID SOUTH THAT SHOULD PERSIST THROUGH TODAY. HIGH TEMPERATURES SHOULD REMAIN NEAR OR BELOW FREEZING TODAY. THIS WILL BE ESPECIALLY TRUE ACROSS AREAS WITH REMAINING SNOWPACK WHERE LOW TEMPERATURES SHOULD PLUMMET INTO THE LOWER TEENS. HIGH PRESSURE MOVES EAST ON SUNDAY WITH A RETURN TO SOUTHERLY LOW LEVEL FLOW AND MODERATING TEMPERATURES.
BUT A WEAK CANADIAN COLD FRONT WILL TRACK SOUTHWARD FROM THE HILINE SAT EVE, CHANGING THE PRECIP TO ALL LIGHT SNOW. 15 OF AN INCH LIQUID AND TOTAL SNOW OF AROUND 1 INCH AT LOWER ELEVATIONS AND 2 TO 4 INCHES IN THE MTNS (UP TO 6 INCHES POSSIBLE IN THE HIGHER TERRAIN OF THE ROCKY MTN FRONT AND THE SOUTHWEST MTN RANGES). WILL ALSO HAVE TO KEEP AN EYE OUT FOR SHORT-LIVED, SPOTTY AREAS OF FREEZING RAIN/SLEET OVER HILL/BLAINE/FERGUS COUNTIES OVERNIGHT SAT AS WARM AIR ALOFT AHEAD OF THE TROF AXIS EXITS EASTWARD.
THE STORM SYSTEM WILL BEGIN TO EJECT NE WITH WINDS GRADUALLY DECREASING AS COLD HIGH PRESSURE BEGINS TO BUILD IN FROM THE LOWER MISS VALLEY. WITH COLD AND DRY AIR MASS IN PLACE EXPECTING A LIGHT FREEZE MOST AREAS WITH MIN TEMPS IN THE UPPER 20S MOST AREAS TO THE LOWER 30S ALONG THE COAST. WINDS WILL GRADUALLY DIMINISH TO AROUND 5 MPH ACROSS THE INLAND AREAS TO AROUND 10 MPH ALONG THE COAST PRODUCING WIND CHILLS GENERALLY IN THE LOWER/MID 20S. COOL HIGH PRESSURE BUILDS IN OVER THE AREA FROM THE TENNESSEE VALLEY PRODUCING CLEAR SKIES. BUT A CONTINUATION OF COOLER THEN NORMAL TEMPS.
IN THE ID-WY BORDER REGION SOME 3 TO 6 INCH AMOUNTS ARE LIKELY FOR THE HIGH ELEVATION PASSES GOING INTO THE COWBOY STATE. TEMPERATURES IN THE SNAKE RIVER PLAIN WILL STRUGGLE TO GET ABOVE FREEZING. AND LIKELY STAYING BELOW FREEZING BY MON.
1036 PM CST FRI JAN 22 2016 STRATUS ALONG THE I-29 CORRIDOR IS SLOWLY INCHING WESTWARD IN DEVELOPING EASTERLY FLOW AS HIGH PRESSURE CENTER SHIFTS EAST. BUT WITH 925 HPA TEMPS RISING ABOVE FREEZING ACROSS THE WESTERN HALF OF THE FORECAST AREA. UPPER RIDGING IS PRESENT SATURDAY NIGHT WHICH SHOULD HELP TO GIVE A DRY NIGHT. FAIRLY STRONG UPPER TROUGH MOVES INTO THE FRONT RANGE OF THE ROCKIES AND INTO THE PLAINS SUNDAY NIGHT.
BAGGS AND DIXON AREAS OF WYOMING RUNNING COOLER THAN PROJECTED SO WE LOWERED OVERNIGHT TEMPERATURES A FEW DEGREES THERER AS WELL AS WIND CHILL READINGS. AN UPPER LEVEL RIDGE WILL REMAIN IN PLACE OVER WYOMING AND THE ROCKY MOUNTAIN REGION THROUGH SATURDAY NIGHT. MODELS HAVE REMAINED RATHER CONSISTENT OVER THE PAST FEW DAYS AT SHOWING A PROGRESSIVE UPPER TROUGH MOVING ACROSS WYOMING/COLORADO ON SUNDAY AND THEN INTO NEBRASKA ON SUNDAY NIGHT.
Most locations remained near or just above freezing into the afternoon. Upper level ridging will develop over the central U. Temperatures will rise above freezing Saturday but remain on the chilly side. More substantial warming will take place heading into Sunday as the upper level ridge transitions over the area and southerly winds at the surface increase. A progressive upper level trough will swing from the Rockies and into the central U.
TEMPERATURES THROUGH THE DAY WILL REMAIN NEAR OR BELOW FREEZING EVERYWHERE.
348 AM EST SAT JAN 23 2016 LOW PRESSURE WILL YIELD WIDESPREAD SNOW OVER THE AREA. WITH HIGH PRESSURE BUILDING OVERHEAD ON SUNDAY. HIGH PRESSURE WILL BUILD OVERHEAD TONIGHT AS MASSIVE LOW CONTINUES ITS TREK OVER THE ATLANTIC. SOME LIGHT SNOW MAY BE POSSIBLE UNTIL LATE TONIGHT IN THE RIDGES.
WITH MAYBE SOME SLIGHT DEGRADATION AS THE NIGHTTIME HOURS PROGRESS AS SURFACE AND UPPER LEVEL LOWS MOVE INTO THE MID ATLANTIC REGION.
MOST IF NOT ALL AREAS WILL START OFF CLOUDY WITH THE LOW LEVEL MOISTURE/STRATUS CLOUDS IN PLACE. WHICH SHOULD HELP SCOUR OUT SOME OF THE LOW LEVEL MOISTURE AND ALLOW FOR AT LEAST PARTIAL CLEARING OF THE STRATUS DECK. SO JUST AS THE LOWER CLOUDS LIFT MID LEVEL CLOUDS WILL FILL IN SOME. FEEL COOLER IS THE WAY TO GO REGARDING HIGHS TOMORROW. COLD FRONT TO MOVE THROUGH SUNDAY AFTERNOON OVER NORTHWEST NEBRASKA AND CONTINUE TO THE SOUTH ACROSS WESTERN NEBRASKA SUNDAY EVENING.
317 AM EST SAT JAN 23 2016 FAIR AND DRY WEATHER WILL CONTINUE THROUGH THE WEEKEND AS HIGH PRESSURE REMAINS IN CONTROL.
/ISSUED 354 PM CST FRI JAN 22 2016/ NORTH WINDS ARE BEGINNING THEIR DOWNTREND AS HIGH PRESSURE MOVING UP FROM THE VALLEY OVERCOMES THE REGION DURING THE OVERNIGHT HOURS. HIGH PRESSURE REDEVELOPING TO THE EAST WILL HAVE RETURN FLOW IN PLAY BY EARLY SUNDAY. A WARMER START TO THE WEEK IN THE SEASONABLE LOW TO MID 60S. EARLY WORK WEEK SOUTHERLY FLOW STRENGTHENS PER A TIGHTENING ONSHORE PRESSURE GRADIENT IN RESPONSE TO A SOUTHERN PLAINS TROUGH/COLD FRONT.
AN UPPER LEVEL LOW OFF THE NORTHERN CALIFORNIA COAST TONIGHT WILL MOVE NORTHEAST OVER WESTERN WASHINGTON SATURDAY. HIGH PRESSURE ALOFT WILL BUILD OFFSHORE SATURDAY NIGHT FOR A BRIEF DRY SPELL.
310 AM CST SAT JAN 23 2016 QUIET WEATHER EARLY IN THE SHORT TERM AS UPPER RIDGING REMAINS ACROSS THE CENTRAL US. MILD WEATHER STILL EXPECTED FOR SUNDAY WITH NEARLY NORMAL TEMPS AS LOW PRESSURE BEGINS TO ORGANIZE ACROSS THE FRONT RANGE OF THE ROCKIES.
310 AM EST SAT JAN 23 2016 HIGH PRESSURE WILL REMAIN ANCHORED ACROSS NORTHERN NEW ENGLAND THROUGH THIS WEEKEND AS A STRONG STORM SYSTEM PASSES SOUTH OF THE REGION. A WEAK TROUGH WILL MOVE INTO THE REGION SUNDAY NIGHT WITH A FEW SNOW SHOWERS EXPECTED IN THE MOUNTAINS.
1231 AM EST SAT JAN 23 2016 FAIR AND DRY WEATHER WILL CONTINUE THROUGH THE WEEKEND AS HIGH PRESSURE REMAINS IN CONTROL.
MAYBE ANOTHER HALF TO ONE INCH WITH THIS LAST WAVE FOR AREAS WEST OF I-65 WITH ANOTHER 1 TO 4 INCHES POSSIBLE EAST OF I-65 (THE HIGHER AMOUNTS THROUGH THIS EVENING WILL BE THE FURTHER EAST YOU GO). BUT HIGHS WILL STRUGGLE TO REACH THE FREEZING MARK ESPECIALLY ACROSS LOCATIONS THAT RECEIVED GREATER THAN 4 INCHES OF SNOW. SLIGHT UPPER RIDGING ALONG WITH SUNSHINE WILL ALLOW HELPING WITH THE GREAT SNOW MELT.
THE LOW CIGS REFUSE TO DISSIPATE TONIGHT AND LIKELY WON'T UNTIL AT LEAST LATE TOMORROW MORNING.
1245 AM CST SAT JAN 23 2016 THE INHERITED FORECAST IS MAINLY ON TRACK AS HIGH RES MODELS ARE DOING FAIRLY WELL IN MOVING THE LOW STRATUS ACROSS SOUTH CENTRAL ND EAST WITH TIME.
THE HIGH WILL DRIFT SLOWLY SEWD TONIGHT. THIS IS A RESULT OF A MID LEVEL TROF MOVING ALONG THE INTERNATIONAL BORDER LATE TONIGHT. WILL SEE THE CLOUDS INCREASE IN COVERAGE OVER NE MN AHEAD OF THIS TROF IN THE WARM AIR ADVECTION PRECEDING IT. LATEST FORECAST SOUNDINGS NO LONGER SUPPORT FREEZING DRIZZLE OR SNOW. FORECAST SOUNDINGS AT THIS TIME SUPPORT LIGHT SNOW OVER ANY FREEZING PCPN AND HAVE A SNOW MENTION.
130 AM CST SAT JAN 23 2016 Inherited Advisory for Blowing Snow thru press time, will let expire as winds begin to relax about that time on high pressure nosing in. The high strengthens its grip/hold on our weather tonight as it ridges across the TN valley, and starts a moderating trend Sunday.
NORTHWEST FLOW ALOFT WILL CONTINUE AS AN UPPER LEVEL RIDGE OF HIGH PRESSURE MOVES OVERHEAD AMIDST TWO ENHANCING UPPER LEVEL LOWS ON THE WEST COAST AND THE SOUTHEASTERN REGION OF THE UNITED STATES. BY SUNDAY AFTERNOON WINDS ALOFT WILL HAVE SHIFTED TO A MORE SOUTHWESTERLY DIRECTION ALONG WITH AN INCREASE IN SPEED DUE TO A STRENGTHENING PRESSURE GRADIENT ASSOCIATED WITH AN APPROACHING UPPER LEVEL TROUGH FROM THE WEST.
The surface anticyclone over the southern Plains is nosing into the CWA, resulting in light and variable winds for much of the region. By sunrise, most of the CWA will be in the low/mid 20s, but a few low-lying areas could dip into the upper teens. After a cold start to the day, temperatures will rebound nicely as southerly winds increase in response to a developing lee trough. Wind speeds of 10-20 mph are anticipated this afternoon, with high temperatures in the low/mid 60s for most of the area. This will result in warmer overnight low temperatures, ranging from the mid 30s to lower 40s.
1010 PM MST FRI JAN 22 2016 THE RIDGE AXIS WILL SHIFT EAST LATE THIS AFTERNOON ALLOWING FOR INCREASING HIGH CLOUDS TONIGHT INTO SATURDAY. SW GRADIENT WINDS WILL ALSO BE ON THE INCREASE ON SATURDAY MAINLY OVER THE HIGHER TERRAIN AND NORTH-FACING SLOPES. THE STORM SYSTEM WILL BE AFFECTING OUR WEATHER EARLY SUNDAY MORNING AS AN UPPER LEVEL TROUGH AND SURFACE COLD FRONT MOVE OVERHEAD. SNOW AMOUNTS LOOK TO RANGE FROM ABOUT 4 TO 8 INCHES WITH MTNS NORTH OF THE SAN JUANS/LA SALS FAVORED WITH THE HIGHER AMOUNTS.
THE WEEKEND WILL START OUT ON THE COLD SIDE IN THE WAKE OF YESTERDAY'S COLD FRONT. BUT SOUTHERLY WINDS WILL RETURN LATE IN THE DAY AS THE RIDGE AXIS SLIDES THROUGH THE REGION. STRONGER SOUTHERLY WINDS WILL RETURN ON SUNDAY AHEAD OF THE NEXT LONGWAVE TROUGH MOVING THROUGH THE ROCKIES.
SUB FREEZING TEMPERATURES ACROSS WEST TENNESSEE AND PORTIONS OF NORTH MISSISSIPPI WILL CONTINUE TO SUPPORT THE CHANCE OF SNOW OVER THE NEXT FEW HOURS. SNOW WILL COME TO AN END LATE TONIGHT AS THE UPPER LEVEL LOW LIFTS OFF TO OUR NORTHEAST. CANADIAN HIGH PRESSURE WILL BUILD IN FROM THE NORTHWEST AND DRY AIR WILL FILTER INTO THE MID-SOUTH. TEMPERATURES WILL DROP INTO THE LOW TO MID 20S AREAWIDE. BRIDGES. BLACK ICE WILL BE A CONCERN DUE TO REFREEZING OF ANY RESIDUAL MOISTURE ON THE ROADS. HIGH PRESSURE WILL SLIDE EAST AND SOUTHERLY WINDS WILL USHER IN A MORE SEASONABLE AIRMASS.
1135 PM EST FRI JAN 22 2016 HIGH PRESSURE WILL BUILD EAST ACROSS THE REGION OVERNIGHT INTO SATURDAY. LOW PRESSURE WILL TRACK SOUTH OF THE AREA LATER SATURDAY THROUGH SUNDAY. HIGH PRESSURE WILL BUILD ACROSS THE REGION OVERNIGHT WITH CLEAR SKIES. LOW PRESSURE WILL INTENSIFY OFF THE MID ATLANTIC STATES TONIGHT THEN MOVE ON AN EAST NORTHEAST TRACK INTO THE ATLANTIC SATURDAY. AT THE SAME TIME STRONG HIGH PRESSURE WILL REMAIN JUST TO THE NORTH OF THE STATE. AT THE START OF THE PERIOD THERE WILL BE A HIGH PRESSURE RIDGE BUILT OVER MAINE. WITH A COLD FRONT EXTENDING SOUTH THROUGH LAKE SUPERIOR. SUN MRNG THE LOW AND ASSOCIATED FRONT IN THE NORTH ATLANTIC CONTINUES TO MOVE EAST. THE HIGH PRESSURE RIDGE REMAINS OVER MAINE. SUN EVNG THE RIDGE MOVES EAST OF THE AREA ALLOWING THE FRONT TO MOVE INTO WRN MAINE.
215 AM EST SAT JAN 23 2016 HIGH PRESSURE WILL BUILD ACROSS THE NORTH TODAY AND TONIGHT AS THE BIG STORM MOVING OFF THE MID ATLANTIC COAST PASSES WELL TO OUR SOUTH. HIGH PRESSURE WILL REMAIN ACROSS OUR REGION ON SUNDAY. THIS LOW IS BRINGING SIGNIFICANT WINTER STORM TO MID- ATLANTIC STATES WITH SNOW BEING MEASURED IN FEET AS OPPOSED TO INCHES. HIGH PRESSURE WILL BE OVER THE AREA SUNDAY BRINGING SUNNY TO PARTLY CLOUDY SKIES.
344 AM CST SAT JAN 23 2016 HIGH PRESSURE CENTERED JUST NORTHWEST OF COLLEGE STATION THIS MORNING WITH A VERY DRY AIRMASS OVERHEAD (PW 0. UPPER RIDGING ALONG THE ROCKIES INTO MEXICO DRY NW FLOW ALOFT IN PLACE THROUGH SUNDAY MORNING. TODAY AFTER A CHILLY START NEAR OR JUST BELOW FREEZING (CXO 30 AT 3 AM/CLL 32/IAH 36/GLS 41) TEMPERATURES SHOULD SLOWLY WARM UP INTO THE MID TO UPPER 40S BY LATE MORNING AND TOP OUT THIS AFTERNOON IN THE LOWER TO MID 50S BENEATH FULL JANUARY SUN. FLOW STRENGTHENING IN THE AFTERNOON AND OVERNIGHT WHICH WILL ALLOW FOR WARMER READINGS SUNDAY AND STILL UNDER MOSTLY SUNNY TO SUNNY SKIES WITH JUST A LITTLE CIRRUS SNEAKING IN FROM THE NORTHWEST.
1142 PM EST FRI JAN 22 2016 LOW PRESSURE OVER THE SOUTHEASTERN US WILL DEEPEN AS IT MOVES OFF THE MIDDLE ATLANTIC COAST TONIGHT. HIGH PRESSURE OVER THE CENTRAL PLAINS AND SOUTHERN ONTARIO WILL BUILD ACROSS THE REGION ON SATURDAY.
WENT SLIGHTLY WARMER THAN PREVIOUS FORECAST AND MOS GUIDANCE TONIGHT FOR LOW TEMPERATURES AS EXPECTING THE CLOUD COVER TO HOLD STEADY. WILL REMAIN QUIET SATURDAY THROUGH SUNDAY EVENING AS HIGH PRESSURE BUILDS INTO THE REGION AND TURN WINDS SOUTHERLY. BUT WOULD NOT BE SURPRISED IF A PERIOD CLEARING IS REALIZED AS HIGH PRESSURE/SUBSIDENCE BUILDS IN.
18Z SFC DATA HAS HIGH PRESSURE FROM THE UPPER GREAT LAKES INTO THE SOUTHERN PLAINS WHILE A STORM SYSTEM ORGANIZED IN THE SOUTHEAST UNITED STATES. AN UPPER RIDGE WILL DRIFT EAST ACROSS THE REGION WITH SLIGHTLY ABOVE NORMAL TEMPS. SYNOPTIC SCALE LIFT AND LOW LEVEL MOISTURE WILL INCREASE AHEAD OF THE WESTERN CONUS TROUGH. THE GENERAL MODEL TREND OF THE PAST COUPLE OF DAYS HAS BEEN TO SLOW THE ARRIVAL OF THIS TROUGH. AND REPLACED WITH PATCHY FREEZING DRIZZLE WHICH IS SUPPORTED BY NAM/GFS BUFR SOUNDINGS.
359 AM EST SAT JAN 23 2016 THE STORM SYSTEM OVER THE EAST COAST WILL CONTINUE TO MOVE EASTWARD TODAY AS HIGH PRESSURE BUILDS OVER THE OHIO VALLEY.
101 AM EST SAT JAN 23 2016 LOW PRESSURE WILL YIELD WIDESPREAD SNOW OVER THE AREA. WITH HIGH PRESSURE BUILDING OVERHEAD ON SUNDAY. HIGH PRESSURE WILL BUILD OVERHEAD TONIGHT AS MASSIVE LOW CONTINUES ITS TREK OVER THE ATLANTIC. SOME LIGHT SNOW MAY BE POSSIBLE UNTIL LATE TONIGHT IN THE RIDGES.
BAGGS AND DIXON AREAS OF WYOMING RUNNING COOLER THAN PROJECTED SO WE LOWERED OVERNIGHT TEMPERATURES A FEW DEGREES THERE AS WELL AS WIND CHILL READINGS. AN UPPER LEVEL RIDGE WILL REMAIN IN PLACE OVER WYOMING AND THE ROCKY MOUNTAIN REGION THROUGH SATURDAY NIGHT. MODELS HAVE REMAINED RATHER CONSISTENT OVER THE PAST FEW DAYS AT SHOWING A PROGRESSIVE UPPER TROUGH MOVING ACROSS WYOMING/COLORADO ON SUNDAY AND THEN INTO NEBRASKA ON SUNDAY NIGHT.
332 AM CST SAT JAN 23 2016 Well, it has been a week since we have reached freezing at Kansas City and it may happen today as the warm-up begins. Sunday an upper level trough will shift east through the eastern Rockies into the central Plains. This will force an associated cold front into the area late Sunday night. Temperatures will be hovering just below freezing across northern MO allowing for freezing drizzle.
Warm air advection with 925mb winds increasing from the southwest to around 25mph should still bring highs into the lower and middle 30s. Some of the models are hinting at another night of low stratus and or freezing fog. This may inhibit the cooling during the late evening, but since highs are only in the lower to mid 30s tomorrow most locations should reach at or below freezing overnight. Overnight Sunday the low level moisture will deepen, but not reach the layer needed to produce ice in the cloud.
DEEPENING LOW PRESSURE EAST OF THE VIRGINIA/NORTH CAROLINA BORDER WILL BEGIN TO MOVE OUT TO SEA TONIGHT. HIGH PRESSURE WILL RETURN EARLY IN THE NEW WEEK.
316 AM CST SAT JAN 23 2016 High pressure over the Ozarks will keep temperatures on the cool side for one more day with morning lows in the upper teens to lower 20s and wind chills in the upper single digits to lower teens this morning. This will be the beginning of a warm up however as an upper level ridge makes its way over the region tonight. The upper ridge will move quickly across the region though as another upper level trough moves into the plains Sunday night.
1129 PM EST FRI JAN 22 2016 AVIATION HIGH PRESSURE WILL DRIFT THROUGH THE REGION TONIGHT AND SATURDAY AND BRING FAIR WEATHER. A FEW FLURRIES ARE POSSIBLE ACROSS THE EASTERN HALF OF THE LOWER PENINSULA TONIGHT OFF OF LAKE HURON. SUNDAY INTO SUNDAY NIGHT A LOW PRESSURE SYSTEM WILL MOVE THROUGH THE NORTHERN GREAT LAKES. DELTA T/S WILL REMAIN HIGH ENOUGH IN THE LOWER TO MIDDLE TEENS TO PRODUCE BOTH CLOUDS AND FLURRIES IN SHALLOW LAKE CONVECTION. WE WILL BE TOO WARM FOR LAKE CLOUDS AND THE DEEPER MOISTURE ASSOCIATED WITH THE LOW SHOULD REMAIN NORTH OF CENTRAL LOWER MICHIGAN.
1045 PM EDT SUN MAR 20 2016 THE AVIATION SECTION HAS BEEN UPDATED BELOW HIGH PRESSURE WILL PROVIDE DRY CONDITIONS EARLY THIS WEEK. THEN A LOW PRESSURE SYSTEM WILL BRING RAIN CHANCES MID WEEK.
ANY CLOUDS COULD STILL PREVENT SOME AREAS FROM REACHING THE FREEZING MARK AS WELL AS NEGATE ANY FROST FORMATION OVERNIGHT. NOTE THAT MUCH OF NASHVILLE IS EXPECTED TO REMAIN ABOVE FREEZING DUE TO THE URBAN HEAT ISLAND. BUT OUTLYING PARTS OF DAVIDSON COUNTY AND ESPECIALLY THE SUBURBS ARE MORE LIKELY TO FALL NEAR/BELOW FREEZING. UPPER TROUGH AXIS AND COLD POOL PULLING AWAY FROM MID STATE WITH DIMINSHED PATCHY LIGHT RAIN JUST ABOUT ALL GONE FROM RADAR SCOPE.
SAVE FOR SHELTERED REGIONS WHERE TEMPS MAY TOUCH FREEZING OR JUST BELOW. TEMPS ARE MORE LIKELY TO DROP BELOW FREEZING FOR A FEW HOURS.