Aikyam-Lab/Synoptic-Bench huggingface dataset:
DEW POINTS ACROSS THE FORECAST AREA ARE ONLY IN THE LOW TO MID 60S. THE LOW CEILINGS AND FOG WILL LIFT BY MID MORNING WITH SKIES BECOMING PARTLY CLOUDY WITH CONTINUED WARM TEMPERATURES.
AN UPPER LEVEL RIDGING WILL BEGIN TO DEVELOP OVER THE WEST COAST TONIGHT ACCOMPANIED BY DRY COOL NORTHERLY FLOW.
844 PM EST MON MAR 2 2015 ON THE NATIONAL VIEW WE FIND A CUTOFF LOW EMBEDDED IN A MUCH LARGER TROUGH. AS A REFLECTION OF THIS LOW A MID LEVEL RIDGE IS BUILDING NORTHWARD ACROSS OLD MEXICO AND TEXAS. THIS MID LEVEL RIDGE COVERS THE BREADTH OF THE GULF OF MEXICO. WINDS IN THE LOWEST 3K FEET OF THE EVENING LAUNCH CAME IN WITH NEAR 15 KNOTS. BUT HAVE LEFT ISOLATED SHOWERS THERE DUE TO THE SPREADING OF THE LOW LEVEL STRATOCUMULUS SOUTH OF THE UPPER KEYS. A LARGE AREA OF HIGH PRESSURE WILL TRAVERSE THE NORTHEAST AND OVER THE ATLANTIC.
HIGH PRESSURE WILL BE NORTH/NORTHEAST OF THE REGION THIS 00Z TAF PERIOD.
701 PM CST MON MAR 2 2015 WATER VAPOR LOOP INDICATED UPPER LEVEL RIDGE BUILDING OVER THE PLAIN STATES. THE MAIN CHALLENGE WILL BE SNOW/BLOWING SNOW AND STRONG COLD FRONT LATE TONIGHT AND TUE. THERE WILL ALSO BE A BAND OF SNOW BEHIND THE SURGING COLD FRONT. TEMPS WILL RECOVER AS HIGH PRESSURE SHIFTS EAST OF THE REGION. A WIND CHANGE WILL OCCUR LATER TONIGHT AS A COLD FRONT MOVES THROUGH.
HIGH PRESSURE WILL SHIFT EAST ON TUESDAY AND ESE WINDS AROUND 15 KNOTS WILL PREVAIL. /ISSUED 321 PM EST MON MAR 2 2015/ THE MAJOR SYNOPTIC FEATURES ACROSS THE REGION INCLUDE A STATIONARY FRONT ACROSS CENTRAL FLORIDA AND A LARGE AMPLITUDE MID TO UPPER LEVEL RIDGE CENTERED ACROSS THE CENTRAL GULF EXTENDING ACROSS SOUTH FLORIDA.
317 PM MST MON MAR 2 2015 A STRONG SOUTHWESTERLY FLOW ALOFT HAS TRANSPORTED WARMER AIR INTO THE AREA. SOME OF THE HIGHER RES. THE LATEST HIGH RES MODELS SHOW SOME SHOWERS MOVING OFF THE HIGHER TERRAIN AND ONTO THE FRONT RANGE. COLD FRONT WILL PLOW SOUTH INTO NORTHEAST COLORADO AFTER MIDNIGHT AND PUSH THROUGH THE DENVER AREA AROUND SUNRISE. LIFT FROM AN UPPER LEVEL TROUGH WILL BRING THE BEST SNOW LATE TUESDAY AFTERNOON AND TUESDAY EVENING.
445 PM PST MON MAR 2 2015 A LOW PRESSURE SYSTEM WILL BRING PERIODS OF SHOWERS AND ISOLATED THUNDERSTORMS INTO THIS EVENING WITH A CHANCE OF SHOWERS LINGERING OVER COASTAL AREAS INTO TUESDAY MORNING.
Upper ridge will build behind this system and maintain through the rest of the week with dry conditions and warm temperatures. Fog will be possible in the stagnate air-mass under the ridge during the morning hours for much of the week.
416 PM CST MON MAR 2 2015 THE LAST IN THE SERIES OF STORM SYSTEMS WILL BE A FAST MOVING UPPER LEVEL TROF AND ITS ATTENDANT SFC COLD FRONT.
COLD FRONT HAS MOVED THROUGH WILLISTON WITH THE FORECAST PRESSURE SURGE OF 4 MB/3 HR UPSTREAM A BIT IN SOUTHEAST SASKATCHEWAN. THE MAIN STORY WILL BE THE ARCTIC COLD FRONT STILL ON TRACK TO SWEEP ACROSS NORTH DAKOTA LATER THIS EVENING.
340 PM MST MON MAR 2 2015 THIS EVENING WILL SEE THIS LONG DURATION STORM TRANSITION FROM THE WARM PHASE OUT AHEAD OF A SURFACE COLD FRONT AND UPPER LEVEL LOW PRESSURE TROUGH. THE COLD FRONT AND THE FIRST UPPER THROUGH WILL PASS OVER THE AREA THIS EVENING. HAVE GONE AHEAD AND KEPT THE HIGHLIGHTS OUT FOR THE NORTHERN VALLEYS AS THEY SHOULD CHANGE OVER TO SNOW THIS EVENING. BY LATE TUE NIGHT LOOK FOR CLEARING CONDITIONS FROM THE WEST BEHIND THE TROUGH AXIS.
BUT JUST ENOUGH IN THE LOWER LEVELS TO SQUEEZE OUT A FEW SHOWERS ON THE ENE WIND FLOW. ASIDE FROM THIS, A TRANQUIL NIGHT IS EXPECTED WITH HIGH PRESSURE IN CONTROL. HIGH PRESSURE WILL SHIFT EAST ON TUESDAY AND ESE WINDS AROUND 15 KNOTS WILL PREVAIL. /ISSUED 321 PM EST MON MAR 2 2015/ THE MAJOR SYNOPTIC FEATURES ACROSS THE REGION INCLUDE A STATIONARY FRONT ACROSS CENTRAL FLORIDA AND A LARGE AMPLITUDE MID TO UPPER LEVEL RIDGE CENTERED ACROSS THE CENTRAL GULF EXTENDING ACROSS SOUTH FLORIDA.
A STRONG SOUTHWESTERLY FLOW ALOFT HAS TRANSPORTED WARMER AIR INTO THE AREA. SOME OF THE HIGHER RES. THE LATEST HIGH RES MODELS SHOW SOME SHOWERS MOVING OFF THE HIGHER TERRAIN AND ONTO THE FRONT RANGE. COLD FRONT WILL PLOW SOUTH INTO NORTHEAST COLORADO AFTER MIDNIGHT AND PUSH THROUGH THE DENVER AREA AROUND SUNRISE. LIFT FROM AN UPPER LEVEL TROUGH WILL BRING THE BEST SNOW LATE TUESDAY AFTERNOON AND TUESDAY EVENING.
QUIET WEATHER PREVAILED ACROSS THE STATE AS HIGH PRESSURE SPREAD ACROSS THE GREAT LAKES REGION. THE HIGH PRESSURE WILL PUSH INTO THE EASTERN GREAT LAKES TONIGHT. AS A LOW PRESSURE SYSTEM DEVELOPS IN THE CENTRAL PLAINS. OPERATIONAL MODELS ARE ON THE LOWER END OF SNOW TOTALS. NAM HAS CONTINUED TO BE ON THE LOW SIDE. WITH THE GFS/GEM/ECMWF IN THE MIDDLE OR TOWARD THE HIGHER VALUES. SO THERE STILL REMAINS SOME CONCERN THIS EVENT WILL BE TOWARD THE LOWER END OF THINGS. WILL CONTINUE TO PLACE THE HIGHEST QPF AMOUNTS (AROUND 0.
HIGH PRESSURE WILL BRING A DRYING AND WARMING TREND FOR THE LATTER HALF OF THE WEEK.
AN UPPER RIDGE AND LOW LEVEL OFFSHORE FLOW WILL GIVE MOSTLY CLEAR WEATHER TO WESTERN WASHINGTON THROUGH MIDWEEK.
645 PM CST MON MAR 2 2015 COLD FRONT HAS MOVED THROUGH WILLISTON WITH THE FORECAST PRESSURE SURGE OF 4 MB/3 HR UPSTREAM A BIT IN SOUTHEAST SASKATCHEWAN. THE MAIN STORY WILL BE THE ARCTIC COLD FRONT STILL ON TRACK TO SWEEP ACROSS NORTH DAKOTA LATER THIS EVENING.
OBSERVATIONS ACROSS SOUTHEAST WYOMING SHOW THE HIGH WIND EVENT IS A BIT STRONGER THAN PREVIOUSLY EXPECTED AS WIND GUSTS AROUND CONVERSE COUNTY. UPPER LEVEL RIDGE AXIS IS EXPECTED TO BUILD WEST OF THE FORECAST AREA. TEMPERATURES IN THE AFTERNOON WILL BE 5 TO 10 DEGREES COOLER THAN TODAY BUT STILL WELL ABOVE NORMAL FOR THIS TIME OF THE YEAR. WITH HIGHS IN THE 50S TO AROUND 60 IN THE LOWER VALLEYS.
STRONG SW-W WINDS CONTINUE ALONG THE EAST SLOPES OF THE MOUNTAINS AND WILL MAKE NO CHANGES TO THE HIGH WIND WARNINGS IN EFFECT AT THIS TIME.
623 PM EST SAT FEB 7 2015 VFR CONDITIONS ARE EXPECTED TO PERSIST THROUGH THE PERIOD AS HIGH PRESSURE REMAINS IN CONTROL. WINDS WILL GRADUALLY SHIFT TO THE SOUTHEAST ON SUNDAY AS HIGH PRESSURE BUILDS EASTWARD ACROSS THE ATLANTIC. /ISSUED 307 PM EST SAT FEB 7 2015/ HIGH PRESSURE OVER THE SOUTHEASTERN UNITED STATES WILL CONTINUE TO MOVE EAST INTO THE ATLANTIC WATERS TONIGHT INTO SUNDAY.
1013 PM EST SAT FEB 7 2015 AS HIGH PRESSURE RETREATS TO THE EAST OVERNIGHT. AN ADVANCING LOW PRESSURE SYSTEM FROM THE CENTRAL PLAINS WILL BRING RAIN TO THE REGION SUNDAY AFTERNOON AND EVENING. HIGH PRESSURE WILL THEN SETTLE IN BEHIND THE FRONT. HAVE NUDGED TEMPS UP SLIGHTLY WITH OVERNIGHT LOWS RANGING FROM THE UPPER 30S NE TO THE LOWER 40S SW. NOT A FREEZING PRECIPITATION SCENARIO.
1014 PM EST SAT FEB 7 2015 ADVANCING LOW PRESSURE IS FORECASTED TO DRAW WARMER AIR OVER THE UPPER OHIO VALLEY REGION THIS WEEKEND. LOW PRESSURE WILL MAKE IT'S APPROACH ALONG A STALLED BOUNDARY TO THE NORTH TOMORROW MORNING. THERE IS VERY LITTLE UPPER LEVEL MOISTURE PRESENT IN THE MODELS UNTIL LATER SUNDAY NIGHT WHEN THE UPPER TROUGH REACHES THE OHIO VALLEY. HELD HIGHS CLOSER TO THE COOLER MET NUMBERS. A SHALLOW LAYER OF SUB-FREEZING TEMPS IS LEADING TO FZRA/IP BUFR SOUNDINGS PRIMARILY ALONG THE NORTH AS THE COLD AIR ARRIVES PRE- DAWN MON.
High pressure is forecast to briefly build into the region on Sunday with peeks of sunshine from time to time in the afternoon and continued well-above-normal high temperatures.
/ISSUED 220 PM CST Sat Feb 7 2015/ A cold front will move south into the area tonight and push through most of west Texas by Sunday afternoon.
A STRONGER UPPER LOW CURRENTLY OFF THE CALIFORNIA COAST WILL APPROACH THE AREA ON SUNDAY WITH INCREASING CLOUDS DURING THE AFTERNOON.
WILL GO AHEAD AND PUT OUT A FREEZING RAIN ADVISORY AS MODELS DO NOT HAVE THAT BAND MOVING MUCH UNTIL THE EARLY MORNING HOURS WHEN IT PUSHES SOUTH. THERE HAVE BEEN SOME REPORTS OF LIGHT FREEZING MIST OVER THE NORTHERN RED RIVER VALLEY. MODEL SOUNDINGS ARE FAVORABLE FOR FREEZING DRIZZLE. WILL LEAVE OUT OF ANY HEADLINES FOR NOW AND JUST PUT A PATCHY FREEZING DRIZZLE MENTION FOR NOW. THE MAIN CONCERN WILL BE FREEZING RAIN/SLEET POTENTIAL TONIGHT ACROSS A PORTION OF SE NORTH DAKOTA. WITH SURFACE TEMPERATURES BELOW FREEZING. CONFIDENCE FOR A FREEZING RAIN ADVISORY FOR TONIGHT INTO SUNDAY MORNING IS NOT HIGH ENOUGH.
EXPECT THE LOW CLOUDS AND FOG WILL REACH LRD AREA DURING THE OVERNIGHT HOURS WITH POSSIBLE LIFR CONDS FROM 11Z-15Z. EXPECTING OVERNIGHT LOWS TO BE SEVERAL DEGREES WARMER TONIGHT THAN THIS MORNING GIVEN THE BETTER SURFACE MOISTURE FIELDS. APPROACHING TROUGH ON SUNDAY SWITCHING WINDS NEAR THE SURFACE AND IN THE BOUNDARY LAYER SHOULD RESULT IN WARM DAYTIME HIGHS (850 MB TEMPS 16-17 CELSIUS TOMORROW).
A DEEPER LOW PRESSURE IS EXPECTED TO APPROACH NORTHERN CALIFORNIA COAST SUNDAY. STRONG WINDS ARE EXPECTED AT THE HIGHER ELEVATION EAST OF THE CASCADES BY EARLY AFTERNOON. HAVE INCLUDED THE KLAMATH BASIN IN THIS HIGH WIND WATCH AS WINDS SEEM TO HAVE CHANNELED INTO KLAMATH FALLS STRONGER THAN MODEL INDICATED DURING THE LAST STORM. AS THE LOW PRESSURE APPROACHES THE COAST SUNDAY NIGHT.
STEADY RAIN IS EXPECTED FOR THE BAY AREA AND CENTRAL COAST ON SUNDAY AS A WARM FRONT MOVES THROUGH THE REGION.
A cold front will move south through the area tomorrow shifting southwesterly winds to the north with associated gusts to 15 to 20 kts. /ISSUED 329 PM CST Sat Feb 7 2015/ (Tonight and Sunday) The low clouds have finally dissipated, yielding sunny skies this afternoon across West Central Texas. An hour or two of low clouds may make as a far west as San Angelo, however boundary layer flow will veer quickly to west-southwest keeping the low clouds further east. For Sunday, A cold front will move south across West Central Texas. Another nice day in store with highs ranging from the lower 60S across the Big Country to the lower 60S along the I-10 corridor.
702 PM EST SAT FEB 7 2015 AS HIGH PRESSURE RETREATS TO THE EAST OVERNIGHT. AN ADVANCING LOW PRESSURE SYSTEM FROM THE CENTRAL PLAINS WILL BRING RAIN TO THE REGION SUNDAY AFTERNOON AND EVENING. HIGH PRESSURE WILL THEN SETTLE IN BEHIND THE FRONT. AS THE HIGH PRESSURE RETREATS EAST OF THE AREA. WILL TAKE SOME TIME OVERNIGHT FOR THE LOWER LEVELS TO MOISTEN UP. NOT A FREEZING PRECIPITATION SCENARIO.
905 PM EST SAT FEB 7 2015 HIGH PRESSURE WILL PREVAIL THROUGH THE WEEKEND.
650 PM EST SAT FEB 7 2015 ADVANCING LOW PRESSURE IS FORECASTED TO DRAW WARMER AIR OVER THE UPPER OHIO VALLEY REGION THIS WEEKEND. LOW PRESSURE WILL MAKE IT'S APPRAOCH ALONG A STALLED BOUNDARY TO THE NORTH TOMORROW MORNING. THERE IS VERY LITTLE UPPER LEVEL MOISTURE PRESENT IN THE MODELS UNTIL LATER SUNDAY NIGHT WHEN THE UPPER TROUGH REACHES THE OHIO VALLEY. HELD HIGHS CLOSER TO THE COOLER MET NUMBERS. A SHALLOW LAYER OF SUB-FREEZING TEMPS IS LEADING TO FZRA/IP BUFR SOUNDINGS PRIMARILY ALONG THE NORTH AS THE COLD AIR ARRIVES PRE- DAWN MON.
922 PM EST SAT FEB 7 2015 HIGH PRESSURE WILL DRIFT EAST FROM THE GEORGIA COAST THROUGH SUNDAY.
402 PM MST SAT FEB 7 2015 A COLD FRONT MOVES THROUGH THE AREA THIS EVENING WITH NORTHWEST WINDS GUSTING TOWARD 30 MPH. SUNDAYS HIGH TEMPERATURES WILL BE ABOUT 10 TO NEAR 15 DEGREES COOLER WITH MID TO UPPER 60S.
SSW WINDS WILL CONTINUE SUNDAY WITH GUSTS TO 20KT AS A COLD FRONT APPROACHES. HIGH PRESSURE IS NOW CENTERED FAR TO OUR SOUTHEAST WITH A LOW PRESSURE SYSTEM BREWING OVER THE UPPER MIDWEST AND A STRENGTHENING PRESSURE GRADIENT BRINGING UNSEASONABLY WARM AIR INTO MIDDLE TENNESSEE THIS WEEKEND. TONIGHT'S TEMPERATURES WILL BE CONSIDERABLY WARMER, ONLY DROPPING INTO THE 40'S MOST AREAS, WITH READINGS TOMORROW ONCE AGAIN APPROACHING 60 DEGREES, DESPITE INCREASED CLOUDINESS AND A SLIGHT CHANCE OF RAIN. A COLD FRONT WILL SWEEP THROUGH THE MID STATE TOMORROW NIGHT, WITH A BIT BETTER CHANCE OF RAIN OVERNIGHT, ALTHOUGH THE QPF FOR THIS EVENT REMAINS RATHER LOW GIVEN THAT ONLY THE LOW LEVELS WILL BE SATURATED. TEMPERATURES STARTING OFF THE NEW WEEK WILL BE CONSIDERABLY COOLER.
/ISSUED 623 PM EST SAT FEB 7 2015/ VFR CONDITIONS ARE EXPECTED TO PERSIST THROUGH THE PERIOD AS HIGH PRESSURE REMAINS IN CONTROL. WINDS WILL GRADUALLY SHIFT TO THE SOUTHEAST ON SUNDAY AS HIGH PRESSURE BUILDS EASTWARD ACROSS THE ATLANTIC. /ISSUED 307 PM EST SAT FEB 7 2015/ HIGH PRESSURE OVER THE SOUTHEASTERN UNITED STATES WILL CONTINUE TO MOVE EAST INTO THE ATLANTIC WATERS TONIGHT INTO SUNDAY.
THE MAIN CONCERN WILL BE FREEZING RAIN/SLEET POTENTIAL TONIGHT ACROSS A PORTION OF SE NORTH DAKOTA. WITH SURFACE TEMPERATURES BELOW FREEZING. CONFIDENCE FOR A FREEZING RAIN ADVISORY FOR TONIGHT INTO SUNDAY MORNING IS NOT HIGH ENOUGH.
CEILINGS WILL CONTINUE TO DROP ON SUNDAY AS A WEAK UPPER TROF/CDFNT BEGINS TO AFFECT THE AREA. AS EVIDENCED BY A CONSISTENT SOUTHWEST LOW LEVEL WIND FLOW AND TEMPS IN THE LOWER 60S ACROSS MUCH OF THE AREA. THE LARGE AREA OF HIGH PRESSURE WILL CONTINUE TO MOVE EAST ALONG THE MID ATLANTIC COAST REGION BY SUNDAY. AS A WEAK COLD FRONT AND AREA OF LOW PRESSURE DROPS SOUTHEAST INTO THE LOWER OHIO VALLEY.
1040 PM EST SAT FEB 7 2015 A COLD FRONT WILL DRIFT SOUTH AND STALL SOUTH OF THE REGION TONIGHT ON SUNDAY.
814 PM EST SAT FEB 7 2015 THE INFLUENCE OF HIGH PRESSURE CONTINUES OVER THE STATE OF FLORIDA THIS EVENING. RADIATIONAL COOLING SHOULD BE KEPT IN CHECK BY SOME MINIMAL HIGH CLOUDS AND THE EVENTUAL MOISTENING AT THE LOWER LEVELS FROM THE FLOW OFF THE ATLANTIC. HIGH PRESSURE CENTERED OVER GEORGIA WILL MOVE INTO THE ATLANTIC OCEAN TONIGHT AND SUNDAY. BUT CONTINUE TO RIDGE SOUTHWEST ACROSS THE WATERS.
AN ATLANTIC RIDGE OF HIGH PRESSURE WILL EXTEND ACROSS NORTH FLORIDA OVERNIGHT. A TROUGH OF LOW PRESSURE WILL BE CENTERED OVER THE SOUTHEAST GULF OF MEXICO TONIGHT.
A SURFACE COLD FRONT WILL MOVE SOUTHWARD EARLY SUNDAY MORNING ALTHOUGH SURFACE WIND COMPONENTS MAY NOT FULLY RESPOND WITH A SHIFT TO NORTH-NORTHEAST DIRECTION UNTIL MID MORNING OR SO.
548 PM EST SAT FEB 7 2015 HIGH PRESSURE WILL PREVAIL THROUGH THE WEEKEND.
IT WILL TAKE TIME TO MOISTEN THE LOWEST LEVELS. A COLD FRONT WILL TRIGGER SCT SHWRS LATE IN THE PERIOD ACROSS NORTH ALABAMA.
701 PM EST SAT FEB 7 2015 IT WILL REMAIN MILD WITH TEMPERATURES ABOVE FREEZING TONIGHT. LOCAL AREA TO REMAIN IN WARM SECTOR AND WITH SFC TEMPS EXPECTED ABOVE FREEZING ALONG WITH WARM AIR ALOFT. ANY PCPN SHOULD BE IN LIQUID FORM WITH NO FREEZING EXPECTED.
WATER VAPOR WAS ALSO SHOWING ANOTHER MID-LEVEL TROUGH MOVING THROUGH THE NORTHERN ROCKIES WHICH WILL HAVE AN IMPACT ON US BY SUNDAY MORNING WITH PERHAPS A WINTRY MIX OF PRECIPITATION. WARMER AIR IS OFF THE SURFACE AROUND 0. SOUNDING THERMAL PROFILE SHOW PRECIPITATION TYPE COULD BE TRICKY WITH FREEZING RAIN/SLEET/SNOW ALL POSSIBLE. ANY FREEZING RAIN CLOUD PRODUCE SOME HEADACHES FOR A TIME SUNDAY MORNING BEFORE TEMPERATURES MODERATE TO ABOVE THE 32 DEGREE MARK. SINCE IF FREEZING RAIN IS REALIZED THERE MAY BE NEED FOR A POTENTIAL SHORT-TERM/MORNING HEADLINE.
405 PM MST SAT FEB 7 2015 A COLD FRONT MOVES THROUGH THE AREA THIS EVENING WITH NORTHWEST WINDS GUSTING TOWARD 30 MPH. SUNDAYS HIGH TEMPERATURES WILL BE ABOUT 10 TO NEAR 15 DEGREES COOLER WITH MID TO UPPER 60S.
AN UPPER RIDGE AND LOW LEVEL OFFSHORE FLOW WILL GIVE DRY AND MILD CONDITIONS TO THE AREA SUNDAY AFTERNOON. RAIN ASSOCIATED WITH A WARM FRONT WILL LIFT NORTHEAST ACROSS THE AREA SUNDAY NIGHT.
810 PM MST SAT FEB 7 2015 WINDS HAVE DECREASED AS EXPECTED THIS EVENING AND WE HAVE GONE AHEAD AND CANCELLED THE HIGH WIND WARNINGS FOR OUR FORECAST AREA. BUT WITH ANOTHER WAVE UPSTREAM WE LEFT THE SCATTERED POPS IN FOR LATER TONIGHT IN THE HIGH COUNTRY. STRONG SW-W WINDS CONTINUE ALONG THE EAST SLOPES OF THE MOUNTAINS AND WILL MAKE NO CHANGES TO THE HIGH WIND WARNINGS IN EFFECT AT THIS TIME.
737 PM EST SAT FEB 7 2015 HIGH PRESSURE WILL DRIFT EAST FROM THE GEORGIA COAST THROUGH SUNDAY.
Overall temps are running a little warmer this evening than previously thought due to breezy southerly winds continuing. Temps should generally range through the low to mid 40s with a temp gradient from west (warmest) to east (coldest) across the region. Energy now cresting a broad ridge over the desert southwest will move over the upper midwest tonight and begin to carve out a 500mb trough just west of the Great Lakes late Sunday.
THIS HAS ALLOWED FOR GOOD RADIATIONAL COOLING THIS EVENING AS TEMPERATURES HAVE QUICKLY FALLEN INTO THE LOWER 40S ACROSS THE NORTHERN VALLEY AND THE UPPER 40S TO LOWER 50S ACROSS THE CENTRAL/SOUTHERN VALLEY AS OF 9 PM EST. SOME LIGHT MIXING WILL HELP TO KEEP LOWS WARMER TONIGHT. THE MERCURY WILL BOTTOM OUT IN THE LOWER 30S ACROSS NORTHEAST TN/SOUTHWEST VA AND THE UPPER 30S ELSEWHERE TO THE SOUTH AND WEST. CHATTANOOGA AIRPORT, TN 39 62 48 56 / 0 20 50 20 KNOXVILLE MCGHEE TYSON AIRPORT, TN 38 61 46 52 / 0 10 50 40 OAK RIDGE, TN 38 59 46 51 / 0 20 50 30 TRI CITIES AIRPORT, TN 31 61 44 47 / 0 10 60 50.
DESPITE THE OVERCAST AND NORTH STRONG COLD AIR ADVECTION WILL HAVE MANY SITES FALLING TO BELOW FREEZING FOR A FEW HOURS ON EITHER SIDE OF SUNRISE. AS THE UPPER TROUGH AXIS PASSES EAST OF THE AREA TOMORROW AFTERNOON. MAY SEE A FEW ICE PELLETS MIXED IN BUT SFC TEMPS WILL REMAIN ABOVE FREEZING SO NO ACCUM. /ISSUED 321 PM CST MON FEB 16 2015/ THE COLD FRONT HAS CLEARED THE COAST WITH TEMPERATURES IN THE UPPER 30S TO UPPER 40S IN ITS WAKE. EXPECT LOW TEMPERATURES TONIGHT IN THE LOW TO MID 30S WITH EXTENSIVE CLOUD COVER. SKIES WILL BEGIN TO CLEAR ON TUESDAY AS THE UPPER TROUGH AXIS MOVES EAST OF THE REGION.
913 PM EST MON FEB 16 2015 CLOUDS BEGINNING TO INCREASE OVER THE REGION AS THE NEXT IN THE SEEMINGLY ENDLESS SERIES OF COLD FRONTS APPROACHES OUR AREA. INCREASING SOUTHERLY WINDS AHEAD OF A COLD FRONT WILL REACH 15 KNOTS WITH SOME HIGHER GUSTS TONIGHT. AND SHIFTING WINDS THAT REACH ADVISORY LEVELS AS HIGH PRESSURE BUILDS IN.
HIGH PRESSURE WILL BRING DRY CONDITIONS ACROSS NEVADA THIS WEEK.
932 PM EST MON FEB 16 2015 LOW PRESSURE IS EXPECTED TO BRING ANOTHER ROUND OF SNOW TO THE REGION OVERNIGHT. A BRIEF PERIOD OF UPSLOPE SNOW SHOULD OCCUR IN THE WV/MD RIDGES. DAYTIME TEMPERATURES TUESDAY WILL BE RELATIVELY WARMER.
A STEADY STATE AREA OF LOW PRESSURE (1007 MB) IS LOCATED IN WEST CENTRAL GEORGIA. WITH AN ATTENDENT COLD FRONT DRAPED INTO THE WESTERN GULF OF MEXICO. A WESTERN ATLANTIC RIDGE EXTENDS INTO SOUTH FLORIDA. THE WESTERN ATLANTIC RIDGE LYING ACROSS SOUTH FLORIDA WILL DROP INTO OUR AREA. THE APPROACHING WESTERN ATLANTIC RIDGE WILL OFFSET THE INTENSIYING AREA OF LOW PRESSURE RACING THROUGH THE SOUTHEAST UNITED STATES OVERNIGHT.
807 PM MST MON FEB 16 2015 UPDATED TO ALLOW THE REST OF THE HIGHLIGHTS TO EXPIRE.
SHORT WAVE TROUGH DRIVING THE WINTER PRECIPITATION WILL BE SHIFTING STEADILY EAST TOWARD THE CUMBERLAND PLATEAU BY 06Z TUESDAY AND WILL BE MOVING ACROSS THE APPALACHIAN CREST BY 12Z TAKING THE DEEPER MOISTURE WITH IT.
221 PM PST Mon Feb 16 2015 Dry weather with above normal temperatures will continue through the week under high pressure. Highly amplified ridge along the west coast (Omega Block) will maintain the dry and mild weather pattern for Norcal for the rest of the week.
300 PM PST MON FEB 16 2015 HIGH PRESSURE OVER CALIFORNIA WILL KEEP DRY CONDITIONS AND ABOVE NORMAL TEMPERATURES ACROSS THE REGION THROUGH THE WEEK. WITH THE WEST COAST RIDGE AND THE DEEP AND COLD EASTERN U. MODELS IN GOOD AGREEMENT IN THE SHORT TERM INDICATING THE RIDGE WILL SLOWLY SHIFT INLAND THROUGH MIDWEEK.
THE THREAT FOR AT LEAST LIGHT SNOW WILL REMAIN UNTIL THE UPPER LEVEL TROUGH MOVES THROUGH. A WESTERN RIDGE AND EASTERN TROUGH PATTERN IS EXPECTED THROUGH MIDWEEK. A DEEP CLOSED LOW WILL DIVE SOUTH TOWARD THE GREAT LAKES AND SOUTHERN ONTARIO AND BRING THE BEGINNING OF ANOTHER ARCTIC BLAST LATE STARTING ON TUESDAY NIGHT. SOME LOWER RATIO SNOW IS LIKELY FALLING CLOSER TO THE VA AND TN BORDERS WHERE THE ATMOSPHERE IS WARMER. THIS LOW THE WINTER STORM CONTINUES TO AFFECT THE REGION AND IT IS LEADING TO TOTALS NEAR DOUBLE DIGITS IF NOT NEARLY A FOOT OR MORE ATTM. SHOULD ALSO EXPERIENCE AN END TO MIX WITH FREEZING RAIN AND SLEET. A RIDGE OF HIGH PRESSURE WILL BRING A RESPITE TO THE SNOW CHANCES AS THE LOW DEPARTS.
635 PM EST MON FEB 16 2015 INTENSE LOW PRESSURE WILL CONTINUE TO MOVE NORTHEAST OF LABRADOR TONIGHT. HIGH PRESSURE ACROSS THE MIDWEST WILL BUILD TOWARD THE REGION LATE TONIGHT THROUGH TUESDAY MORNING. LOW PRESSURE WILL MOVE WELL SOUTH OF THE AREA TUESDAY AFTERNOON.
HIGH PRESSURE WILL REDEVELOP FOR THE MID WEEK PERIOD ACROSS THE REGION. A HIGH AMPLITUDE MID LEVEL RIDGE ALONG THE WEST COAST THIS AFTERNOON EXTENDS NORTHWARD INTO THE HIGH LATITUDES ALONG THE AK/CANADIAN BORDER. THE MID LEVEL RIDGE ALONG THE COAST IS FORECAST TO SHIFT INLAND TUESDAY.
LOW PRESSURE OVER AL WILL MOVE EAST-NORTHEASTWARD AWAY FROM THE MIDSOUTH TONIGHT. A SPECIAL WEATHER STATEMENT WAS ALSO SENT REGARDING THE HAZARDOUS BELOW FREEZING TEMPERATURES AND ICE FROM EARLIER WINTERY PRECIPITATION CONSISTING OF A VARIETY OF SLEET. SNOW AND FREEZING RAIN DEPENDING ON THE LOCATION WILL CAUSE HAZARDOUS ROAD CONDITIONS ACROSS MOST OF THE AREA TONIGHT INTO AT LEAST TUESDAY. ANY WATER ON ROADS WILL FREEZE TONIGHT AS TEMPERATURES DROP WELL BELOW FREEZING. LOW TEMPERATURES SHOULD RANGE FROM THE LOWER TEENS NORTH TO AROUND 20 DEGREES FAR SOUTH.
543 PM CST MON FEB 16 2015 COLD FRONT EXITING OFF TO THE EAST AS PRESSURE GRADIENT WILL REMAIN TIGHT WITH COLD AIR ADVECTION CONTINUING TO SPILL INTO THE REGION. AND ANOTHER 10 DEGREES LOWER FURTHER W ACROSS SE TX/C LA WITH TEMPS IN THE LOWER 40S. WITH TEMPS EXPECTED TO EVENTUALLY FALL BELOW FREEZING BY DAYBREAK IN THIS AREA. ANY REMAINING MOISTURE ON ELEVATED ROADWAYS/BRIDGES MAY FREEZE IN A FEW SPOTS.
A RIDGE OVER THE WEST COAST WILL BRING NORTHWEST CALIFORNIA DRY WEATHER AND ABOVE NORMAL TEMPERATURES FOR THE NEXT FEW DAYS. THE WEATHER CONTINUES TO BE DOMINATED BY A RIDGE OF HIGH PRESSURE OVER THE WEST COAST BRINGING DRY CONDITIONS AND ABOVE NORMAL TEMPERATURES TO NORTHWEST CALIFORNIA.
353 PM MST MON FEB 16 2015 UPPER TROF IS PROGRESSING SOUTHWARD THROUGH WESTERN AND SOUTHERN CO ATTM WITH NICE CONVECTIVE ENHANCEMENT ON AREA RADARS. EXCEPT IN AND NEAR THE HIGHER TERRAIN OF EL PASO AND WESTERN PUEBLO COUNTY. THOUGH THERE IS STILL SOME ENERGY TRAILING DOWN WEST SIDE OF THE UPPER TROF CLIPPING THROUGH FAR NORTHEAST SECTIONS OF SOUTHERN COLORADO. WITH UPPER 30S AND LOWER 40S ACROSS THE LOWER ELEVATIONS.
THE FZ LINE WILL QUICKLY PUSH INTO CENTRAL PARTS OF THE CWA THAT HAVE NOT SEEN FREEZING READINGS SO FAR TODAY. FEEL THERE WILL BE A 2-4 HR WINDOW OF TIME WHERE LIGHT PRECIP WILL EXIST WITH SUB FREEZING TEMPS FOR A GOOD PORTION OF THE CENTRAL CWA. FREEZING RAIN WILL CONTINUE FROM GLH TO GWO THROUGH THE AFTERNOON/EVENING SPREADING INTO THE GTR/JAN/HKS AREAS AFTER 00Z BEFORE ENDING AROUND 17/06Z.
A LOW PRESSURE TROUGH WILL BRING A FEW DEGREES OF COOLING WITH BREEZY WINDS TO NORTHERN ARIZONA AGAIN ON TUESDAY. WARMER TEMPERATURES RETURN FOR AFTER TUESDAY UNDER A STRONG HIGH PRESSURE RIDGE.
636 PM EST MON FEB 16 2015 AN INVERTED SURFACE TROF WILL MOVE THROUGH THE EASTERN GREAT LAKES TONIGHT.
MOORE UPPER TROF IS PROGRESSING SOUTHWARD THROUGH WESTERN AND SOUTHERN CO ATTM WITH NICE CONVECTIVE ENHANCEMENT ON AREA RADARS. EXCEPT IN AND NEAR THE HIGHER TERRAIN OF EL PASO AND WESTERN PUEBLO COUNTY. THOUGH THERE IS STILL SOME ENERGY TRAILING DOWN WEST SIDE OF THE UPPER TROF CLIPPING THROUGH FAR NORTHEAST SECTIONS OF SOUTHERN COLORADO. WITH UPPER 30S AND LOWER 40S ACROSS THE LOWER ELEVATIONS.
CHATTANOOGA AIRPORT, TN 24 36 22 34 / 80 10 20 20 KNOXVILLE MCGHEE TYSON AIRPORT, TN 20 30 20 31 / 90 10 20 40 OAK RIDGE, TN 18 30 19 30 / 90 10 20 40 TRI CITIES AIRPORT, TN 20 27 18 26 / 100 10 20 60 NC.
MAY SEE A FEW ICE PELLETS MIXED IN BUT SFC TEMPS WILL REMAIN ABOVE FREEZING SO NO ACCUM. /ISSUED 321 PM CST MON FEB 16 2015/ THE COLD FRONT HAS CLEARED THE COAST WITH TEMPERATURES IN THE UPPER 30S TO UPPER 40S IN ITS WAKE. EXPECT LOW TEMPERATURES TONIGHT IN THE LOW TO MID 30S WITH EXTENSIVE CLOUD COVER. SKIES WILL BEGIN TO CLEAR ON TUESDAY AS THE UPPER TROUGH AXIS MOVES EAST OF THE REGION.
UNCLEAR WHERE/WHEN BOUNDARY WILL BE OVERRUN BY WARMER AIR ALOFT.
NORTHERLY FLOW ALOFT WILL CONTINUE THROUGH TUESDAY AS A HIGH-AMPLITUDE UPPER RIDGE REMAINS CENTERED ALONG THE WEST COAST.