Aikyam-Lab/Synoptic-Bench huggingface dataset:
254 PM EST SAT NOV 28 2015 CURRENTLY - A WEAKENING AREA OF HIGH PRESSURE OVER THE SOUTHEASTERN UNITED STATES. ALONG WITH TROUGHING OVER THE EASTERN BAHAMAS IS GENERATING MODERATE TO FRESH NORTHEAST BREEZES ACROSS THE FLORIDA KEYS AND SURROUNDING AREA. VIRTUALLY ALL RAIN ECHOES ARE LONG AND TO THE SOUTHEAST AND EAST OF A CLOUD LINE EXTENDING SOUTHWESTARD FROM NEAR KEY LARGO TO THE DISTANT FLORIDA STRAITS OFF THE LOWER KEYS. FORECAST - THE AREA OF HIGH PRESSURE IN THE SOUTHEASTERN UNITED STATES WILL CONTINUE TO WEAKEN THROUGH THE WEEKEND. THE TROUGHING OVER THE EASTERN BAHAMAS AND CUBA WILL SPREAD WESTWARD. AND A WEAK RIDGE OVER THE EXTREME SOUTHEASTERN UNITED STATES. THE WARMER TRAJECTORY WILL ALLOW TEMPERATURES TO CLIMB SEVERAL DEGREES. HIGHER PRESSURE TO OUR NORTH WILL CONTINUE TO WEAKEN AS A TROUGH OVER EASTERN CUBA SPREADS WESTWARD ACROSS THE CARIBBEAN.
/ISSUED 1015 AM CST SAT NOV 28 2015/ COLD FRONT HAS FINALLY CLEARED THE COAST THIS MORNING. AT THE COAST (ROUGHLY GALVESTON ISLAND OVER TO THE HIGH ISLAND AREA).
315 PM CST SAT NOV 28 2015 THE TENNESSEE VALLEY REMAINS ALMOST COMPLETELY DRY THIS AFTERNOON DESPITE THE SLOW BUT STEADY APPROACH OF A STRONG COLD FRONT. THE FRONT HAS REACHED A TEXARKANA-DYERSBURG TN-LOUISVILLE KY LINE, BUT THE PERSISTENT SW FLOW ALOFT, RIDGING OVER THE GULF OF MEXICO, AND DRY AIR IN THE LOWEST 8-10KFT HAS KEPT RAIN FROM PUSHING INTO THE HUNTSVILLE FORECAST AREA THUS FAR.
/ISSUED 1042 AM CST SAT NOV 28 2015/ Freezing rain advisory cancelled for Osage / Pawnee counties with temp just above freezing. The heaviest rain will remain across parts of southeast Oklahoma and west central Arkansas nearest the low level jet and consequent maximum in low level moisture transport. With this trend expected to continue, the freezing rain area to the west of Highway 75 in northeast Oklahoma is at its maximum extent. Western parts of Osage and Pawnee counties could see an additional tenth of an inch or so of ice accumulation before surface temperatures warm above freezing late this morning. The only change to the existing Freezing Rain Advisory will be to push back the expiration time to noon.
1146 AM CST SAT NOV 28 2015 THE MAIN FORECAST CHALLENGE FOR THIS SET OF TAFS IS TIMING THE FREEZING RAIN. KOKC AND KOUN BOTH SIT RIGHT BY THE FREEZING LINE. SO THERE IS A LOT OF UNCERTAINTY AS FAR AS WHEN THEY WILL TRANSITION BETWEEN FREEZING RAIN AND RAIN. RAIN AND FREEZING RAIN WILL CONTINUE THROUGH THIS AFTERNOON OVER MOST OF THE TERMINALS ALONG WITH CIGS AT OR BELOW 010. /ISSUED 503 AM CST SAT NOV 28 2015/ FREEZING RAIN WILL CONTINUE THROUGH THE MORNING HOURS, MAINLY ALONG AND WEST OF THE I44 CORRIDOR. TEMPS, THANKFULLY, HAVE MODERATED AT OR JUST BELOW FREEZING AND WIND SPEEDS ARE GENERALLY REMAINING BELOW 20 MPH. STILL EXPECT SOME FREEZING RAIN TO CONTINUE OVER NW OK THIS AFTERNOON.
THE PHOENIX METRO ONCE AGAIN SAW TEMPS IN THE LOWER 30S TO LOWER 40S. AND THE HIGHER TERRAIN LOCATIONS EAST OF PHOENIX FELL INTO THE UPPER 20S. AND BELOW NORMAL TEMPS IN THE LOWER 60S.
IFR CEILINGS WILL REMAIN PREVALENT OVER SOUTH TEXAS BEHIND THE COLD FRONT WITH AREAS OF LIGHT RAIN/SHOWERS AFFECTING MAINLY THE COASTAL PLAINS AND PROVIDING MVFR VSBYS. HIGH PRESSURE WILL CONTINUE TO BUILD INTO THE REGION TODAY AND SLOWLY PUSH THE COLD FRONT THROUGH THE OFFSHORE WATERS TODAY. WINDS WILL INCREASE TO SCEC LEVELS OVER THE WATERS LATER TODAY AS THE COLD FRONT ADVANCES.
217 PM CST SAT NOV 28 2015 A MID/UPPER TROUGH OVER THE CENTRAL GREAT BASIN AREA WILL CONTINUE TO BRING A MOIST SOUTHWEST FLOW REGIME TO THE CENTRAL PLAINS STATES THROUGH THE WEEKEND WITH PERIODS OF FREEZING DRIZZLE AND LIGHT FREEZING RAIN REMAINING POSSIBLE ACROSS MUCH OF THE AREA WITH PERIODIC EPISODES OF ISENTROPIC UPGLIDE. THE WINTER WEATHER ADVISORY WILL BE EXTENDED THROUGH THE NIGHT TO ACCOUNT FOR ADDITIONAL LIGHT FREEZING DRIZZLE AND A FEW POCKETS OF LIGHT FREEZING RAIN MIXED WITH SLEET AT TIMES. HOWEVER AS LOW LEVEL WINDS VEER TO MORE OF AN EASTERLY DIRECTION THE FREEZING LINE SHOULD BEGIN TO RETREAT WEST-NORTHWEST ALLOWING MUCH OF SOUTHEAST KS AND PORTIONS OF SOUTH CENTRAL KANSAS TO TRANSITION TO LIGHT RAIN SHOWERS OR DRIZZLE DURING THE AFTERNOON HOURS ON SUNDAY.
442 AM EST THU DEC 3 2015 DESPITE PROFILES SHOWING LIMITED TO NOW ICE CRYSTALS IN THE LOWER LEVELS. WILL STILL KEEP A SMALL CHANCE OF DRIZZLE/FREEZING DRIZZLE GOING THOUGH. SINCE THEN THEY HAVE BEEN SLOWLY DWINDLING WITH THE RIDGE SLIDING OVERHEAD AND WHAT WAS AT ONE POINT CONVERGENT UPSLOPE WINDS DIMINISHING SIGNIFICANTLY. FOR TONIGHT GOING ON THE LOWER END OF THE GUIDANCE OF TEMPERATURES SEEMED REASONABLE EVERYWHERE BUT E WHERE THERE COULD BE A FEW MORE CLOUDS.
YOU CAN EXPECT THAT TO CONTINUE TODAY AS HIGH PRESSURE BUILDS INTO THE AREA. IN FACT THE HIGH SHOULD CONTINUE TO BUILD IN THE EASTERN UNITED STATES THROUGH THIS WEEKEND. EXPECT MOSTLY CLEAR AND SUNNY CONDITIONS THROUGH THE END OF THE WEEK AND COOLER TEMPERATURES. A COOL NIGHT IS IN STORE FOR THE AREA TONIGHT AS CLOUDS SHOULD BE VOID OF THE AREA AND THAT WILL ALLOW FOR TEMPERATURES TO FLIRT WITH THE FREEZING MARK ACROSS THE NORTHSHORE AND SOUTHERN MISSISSIPPI.
AS STRONG MODEL CONSENSUS DEPICTING SFC RIDGING INFLUENCES TO CONTINUE BUILDING INTO THE REGION FROM THE CNTRL PLAINS/ROCKIES THRU FRI MORNING. THIS RIDGING SFC WX PATTERN WILL BE SUPPORTED ALOFT BY CURRENT NWLY FLOW REGIME BEING REPLACED BY BROAD UPPER LEVEL RIDGING INFLUENCES THRU AT LEAST SAT MORNING. BEFORE A GRADUAL ORIENTATION BACK TO SWLY FLOW BEGINS AS AN UPPER LEVEL TROUGH MOVES INTO THE CNTRL PLAINS/MID MS RIVER VALLEY. AS SFC RIDGING INFLUENCES BEGIN TO SHIFT EWD. AND AS APEX OF UPPER LEVEL RIDGING BECOMES ESTABLISHED ACROSS THE REGION AS FRI PROGRESSES. AS MORE OF A SWLY UPPER LEVEL FLOW ORIENTATION DEVELOPS AND SFC RIDGING INFLUENCES CONTINUE TO SHIFT SLOWLY EWD.
As for temperatures, with little change expected to the general air mass across the high plains, look for highs back up into the 50s(F) again this afternoon. For Thursday night, south winds increase to 10 to 20 mph late ahead of an approaching upper level trough with mostly clear skies.
327 AM CST THU DEC 3 2015 BROAD AREA OF HIGH PRESSURE WILL SHIFT EAST FROM NEBRASKA AND KANSAS TO SRN IA INTO ARKANSAS BY THIS AFTERNOON. SFC WINDS BECOMING WEST TO SOUTHWEST TODAY WILL YIELD MODEST LOW LEVEL WARM ADVECTION TO GO ALONG WITH THE MID LEVEL WARMING LEADING TO WARMER TEMPERATURES TODAY.
WV Imagery indicates a weak upper level ridge of high pressure moving eastward across the Intermountain West. Near the surface, a broad area of high pressure is centered across the Great Basin into the Central Rockies. With the clouds, and weaker winds/less mixing on Thursday, shaved a few degrees off high temperatures expected, with highs mainly in the lower 50s. For Thursday night, south winds increase to 10 to 20 mph late ahead of an approaching upper level trough with mostly clear skies.
WE WILL FEEL THE EFFECTS OF THE SLOW MOVING UPPER LOW ONCE MORE TODAY BUT CONDITIONS RAPIDLY IMPROVE IN ITS WAKE AS RIDGING ALOFT AND AT THE SFC BUILD ACROSS THE REGION. THE UPPER LOW WILL GAIN FORWARD MOMENTUM AS IT BECOMES ABSORBED INTO THE ACCELERATING SOUTHERN STREAM OF THE JET AIMED NE ALONG THE EASTERN SEABOARD. WILL DELAY THE ONCOMING RIDGE TIL THIS AFTERNOON. THE WAVE WILL PRODUCE SOME CLOUDS AS WELL HELPING TO KEEP THE HIGH TEMPS SUBDUED NEAR 40F THIS AFTERNOON. STRONG WEST COAST RIDGE WILL BE MAKING A PUSH EASTWARD BEGINNING TO REACH SOUTHERN MI THIS EVENING.
/ISSUED 919 PM CST WED DEC 2 2015/ CLOUDS CONTINUE TO ROTATE AROUND LOW PRESSURE NEAR THE GREAT LAKES.
115 AM EST THU DEC 3 2015 A COLD FRONT WILL MOVE OFFSHORE TONIGHT. HIGH PRESSURE WILL STRENGTHEN INLAND THURSDAY AND PREVAIL THROUGH THE WEEKEND AS A WEAK COASTAL TROUGH FORMS OFFSHORE. THE COLD FRONT HAS SHIFTED OFF THE COAST EARLY THIS MORNING AND LOW LEVEL COLD AIR ADVECTION WAS IN ORDER FOR THE REMAINDER OF THE OVERNIGHT. HIGH PRESSURE AT THE SURFACE WILL DOMINATE THE WEATHER IN THE SHORT TERM.
THE UPPER LOW AND ASSOCIATED TROUGH OVER THE NE U. AND ASSOCIATED TROUGH WILL CONTINUE TO PROGRESS EASTWARD. HIGH PRESSURE WILL CONTINUE TO USHER IN MUCH COOLER AIR. WITH MOST LOCATIONS DROPPING INTO THE LOWER 30S AND MID 20S.
/ISSUED 1001 PM CST WED DEC 2 2015/ THE BACK EDGE OF THE CIRRUS SHIELD ASSOCIATED WITH THE LONGWAVE TROUGH EXTENDING FROM S TX NE ACROSS THE GULF COAST AND MID- ATLANTIC STATES HAS NOW SHIFTED JUST E OF THE REGION THIS EVENING. WITH MUCH DRIER AIR IN THE TROUGH/S WAKE YIELDING A CLEAR SKY AREAWIDE TONIGHT. SFC RIDGING CONTINUES TO BUILD ESE INTO THE SRN PLAINS THIS EVENING. 03Z TEMPS HAVE FALLEN INTO THE LOWER/MID 40S. WITH NEAR FREEZING TEMPS POSSIBLE OVER SCNTRL AND PORTIONS OF SW AR AND ADJACENT SECTIONS OF SE OK.
412 AM EST THU DEC 3 2015 LIGHT SNOW SHOWERS WILL TAPER OFF TODAY AS THE UPPER-LEVEL LOW PRESSURE SYSTEM MOVES OFF TO OUR EAST. HIGH PRESSURE WILL RETURN WARM AND DRY WEATHER FOR THE WEEKEND. TEMPERATURES WERE ABOVE FREEZING. WHILE NORTH OF THE TURNPIKE AND IN THE RIDGES AN INCH TOTAL WILL BE POSSIBLE.
NEAR TERM AND SHORT TERM SECTIONS HAVE BEEN UPDATED BELOW HIGH PRESSURE WILL RESULT IN DRY CONDITIONS THROUGH THE WEEKEND WITH A WEAK WARMING TREND.
315 AM EST THU DEC 3 2015 A MUCH QUIETER SHORT TERM FOR NORTH AND CENTRAL GEORGIA AS HIGH PRESSURE BUILDS INTO THE REGION.
322 AM EST THU DEC 3 2015 AN UPPER LEVEL LOW WILL CONTINUE TO PULL EAST TODAY ALLOWING FOR THE LIGHT SNOW TO COME TO AN END EARLY THIS MORNING. THE UPPER LEVEL LOW THAT HELPED PRODUCE SOME LIGHT SNOW ACROSS THE TRI-STATE THIS MORNING WILL PULL OFF TO THE EAST THIS AFTERNOON ALLOWING FOR DRYING CONDITIONS AND A SLOW CLEARING OF SKIES. THIS CORE OF COLD TEMPERATURES WILL MOVE OVERHEAD BEFORE SUNRISE THIS MORNING AND THEN QUICKLY PULL OFF TO THE EAST DURING THE DAY WITH THE UPPER LOW. FORECASTED 850 TEMPS FOR THIS AFTERNOON WOULD SUPPORT HIGHS IN THE MID TO UPPER 40S BUT GIVEN LOW CLOUDS HANGING AROUND AND NOT FULL MIXING TO 850 HIGH TEMPS WILL LIKELY REMAIN IN THE LOW 40S.
A HIGH PRESSURE RIDGE CROSSING THE DESERT SOUTHWEST WILL BRING A WARMING TREND THROUGH THURSDAY.
THE STRATUS WILL DECREASE FROM 15Z TO 19Z ON THU AS WARMER AND DRIER AIR AT 925-850 MB MOVES INTO THE AREA.
Precip is in the form of snow for the northern half of the forecast area and sleet, freezing drizzle or freezing rain for the lower basin and Wenatchee area. Temperatures remain just below freezing in the Moses Lake area except for at Moses lake airport and Ephrata airport where temps have risen to 32 and 33 respectively. Will keep the freezing rain advisory intact since other locations remain below freezing. 16 of an inch will be possible before temperatures warm above freezing.
TEMPERATURES RANGE FROM AS LOW AS THE MID TO UPPER 30S WELL INLAND TO THE LOWER 50S ALONG THE COAST.
457 AM EST THU DEC 3 2015 LOWER-TROPOSPHERIC FLOW HAS VEERED DURING THE LAST 24 HOURS IN RESPONSE TO A MID-LEVEL TROUGH AND ASSOCIATED GEOPOTENTIAL HEIGHT FALLS MIGRATING EASTWARD ACROSS THE DEEP SOUTH. LATEST RADAR AND SATELLITE ANIMATIONS SHOW A DEVELOPING MESOSCALE CONVECTIVE SYSTEM OVER THE LOWER STRAITS OF FLORIDA. LATEST KEY WEST DOPPLER RADAR SCANS SHOW LIGHT SHOWERS MOVING NORTHEASTWARD OVER PORTIONS OF THE LOWER AND MIDDLE KEYS.
RIDGING ALOFT RE-COMMENCES FOR TODAY INTO TONIGHT.
322 AM EST THU DEC 3 2015 HIGH PRESSURE BUILDS ACROSS THE REGION THROUGH THE REST OF THE WEEK.
HIGH PRESSURE TO SETTLE INTO THE SOUTHERN STATES TODAY WITH THE CI SHIELD GETTING A LITTLE PUSH FURTHER OFFSHORE. ALONG THE COAST WILL BE A BIT COOLER.
336 AM EST THU DEC 3 2015 LIGHT SNOW SHOWERS WILL TAPER OFF TODAY AS THE UPPER-LEVEL LOW PRESSURE SYSTEM MOVES OFF TO OUR EAST. HIGH PRESSURE WILL RETURN WARM AND DRY WEATHER FOR THE WEEKEND. HOWEVER UPSTREAM TEMPERATURES FAIL TO DROP DECIDEDLY BELOW FREEZING. BECAUSE THE GROUND ITSELF IS WELL ABOVE FREEZING AND AIR TEMPERATURES WILL JUST TOUCH FREEZING OVERNIGHT.
The main part of the system will arrive on Thursday and should bring some decent amount of snow to the higher elevations and windy conditions. Local 15 inch amounts across some of the higher peaks will be possible around I-80 northward.
WARMER WEATHER WILL RETURN THIS WEEKEND. HOWEVER UPSTREAM TEMPERATURES FAIL TO DROP DECIDEDLY BELOW FREEZING. BECAUSE THE GROUND ITSELF IS WELL ABOVE FREEZING AND AIR TEMPERATURES WILL JUST TOUCH FREEZING OVERNIGHT.
914 PM MST WED DEC 2 2015 HIGH PRESSURE WILL AMPLIFY OVER THE INTERMOUNTAIN WEST THROUGH THURSDAY LEAVING THE REGION IN MOSTLY SUNNY CONDITIONS AND SEASONABLE TEMPERATURES. THE NEXT TROUGH MOVES ONSHORE ACROSS THE PAC NW AND NORTHERN CALIFORNIA ON THURSDAY.
458 AM EST THU DEC 3 2015 THE COLD FRONT CONTINUES MOVING OFFSHORE WITH WITH HIGH PRESSURE ALONG WITH COOLER AND DRIER AIR ENTERING THE REGION. THE HIGH PRESSURE AND DRY CONDITIONS WILL PERSIST OVER THE REGION THROUGH THE WEEKEND. COLD FRONT WILL MOVE OFFSHORE THIS MORNING WITH HIGH PRESSURE BUILDING INTO THE REGION. COLD AIR ADVECTION WILL ALSO OVERTAKE THE AREA WITH HIGH TEMPERATURES TODAY RANGING FROM THE MIDDLE 50S IN THE NORTHERN MIDLANDS TO THE LOW 60S IN THE SOUTHERN CSRA. WITH WINDS DIMINISHING THIS EVENING AND MOSTLY CLEAR SKIES OVERNIGHT RADIATIONAL COOLING CONDITIONS WILL BE OPTIMAL ALLOWING TEMPERATURES TO FALL INTO THE LOWER TO MIDDLE 30S.
THIS MAY BE A RESULT OF WEAK SUBSIDENCE AND NEGATIVE DPVA BEHIND WEAK MID-LEVEL SHORT WAVE ROTATING AROUND DEPARTING UPPER LOW OVER ERN GTLAKES REGION. INCREASING WEST TO NORTHWEST WINDS IN THE LOW LEVELS SHOULD CARRY UPSTREAM STRATUS FIELD ACROSS SRN WI THIS MRNG AND FILL IN THOSE ERN CWA BINOVC. INCREASING WARM AND DRY AIR ADVECTION IN THE LOW LEVELS AS THE WINDS BACK MORE WESTERLY ARE EXPECTED TO ERODE THE CLOUDS FROM WEST TO EAST LATER THIS MRNG THRU THE MID-AFTERNOON.
1140 PM CST WED DEC 2 2015 We decided to include a mention of freezing fog into the forecast tonight. Clear skies, light winds, and sufficient moisture in the atmosphere will be ideal for some freezing fog after midnight tonight. Dew point temperatures were in the low to mid 30s this evening, and will be pushed into the middle to upper 20s toward the early morning hours of Thursday. A negative hydrolapse structure will develop within the lower trop, potentially creating some dense fog in some areas. Winds will become nearly calm by Thursday morning as high pressure moves nearly overhead.
A STRONG UPPER LEVEL LOW CURRENTLY MOVING INTO THE LOWER GREAT LAKES REGION IS PROVIDING CONTINUED STRONG FLOW ALOFT ACROSS THE OHIO RIVER VALLEY. THIS UPPER LEVEL LOW WILL CONTINUE TO MOVE EAST OF THE REGION THROUGHOUT THE MORNING. WITH HIGH PRESSURE ABLE TO TAKE FULL HOLD OF THE REGION THROUGH THE REMAINDER OF THE SHORT TERM FORECAST. WITH DRY AIR FROM THE INCOMING STRONG AREA OF HIGH PRESSURE CUTTING OFF ALL CLOUDS BY 18Z.
A STRONG LONG WAVE TROUGH WILL REMAIN OFFSHORE. AND SHORT WAVES EJECTING FROM THE TROUGH WILL SUPPORT SEVERAL FRONTS MOVING ONSHORE. A WARM FRONT IS NOW LIFTING NORTH OF THE AREA. AND THE TRAILING COLD FRONT WILL MOVE ONSHORE THURSDAY AFTERNOON. AND SOME OF THE HIGHER ELEVATIONS WILL SEE SIGNIFICANT SNOW.
359 AM EST THU DEC 3 2015 IMPACT WEATHER: PATCHY DENSE FOG AND FREEZING DRIZZLE. SYNOPTIC PATTERN AND OBSERVATIONS: LOW PRESSURE WAS OVER NEW ENGLAND EARLY THIS MORNING. THIS TROUGH TURNS INTO A WARM FRONT THAT CROSSES FAR WESTERN ONTARIO AND IS CONNECTED TO LOW PRESSURE IN NRN MANITOBA. THE PARENT UPPER TROUGH TO THE NEW ENGLAND LOW WAS EXITING EAST. TEMPERATURES WERE ALSO BELOW FREEZING IN MANY AREAS. SO FREEZING DRIZZLE ALSO A CONCERN. WITH TEMPERATURES BELOW FREEZING. SYNOPTIC PATTERN EVOLUTION AND ASSOCIATED WEATHER: THE UPPER LOW QUICKLY EXITS THIS MORNING WHILE THE SPOTTY LIGHT PRECIPITATION WILL END THROUGH THE DAY. ESPECIALLY THE HIGHER TERRAIN. DETAILS: JUST NOT A WHOLE LOT HERE AS HIGH PRESSURE BOTH AT THE SURFACE AND ALOFT DOMINATE OUR WEATHER.
LATEST SATELLITE IMAGERY SHOWS THE WEAK TROF THAT BROUGHT MOSTLY CLOUDY TO OVERCAST SKIES AND SOME SPOTTY AREAS OF SNOW FLURRIES AND LIGHT SNOW TODAY IS NOW WELL INTO EASTERN MT, WITH SKIES CONTINUING TO CLEAR OVER OUR REGION.
255 AM CST THU DEC 3 2015 EARLY MORNING WATER VAPOR SATELLITE IMAGERY SHOWED A LARGE UPPER TROUGH OVER THE GREAT LAKES REGION. BROAD RIDGING OVER THE CENTRAL CONUS. AND ANOTHER LARGE UPPER TROUGH JUST OFF THE WESTERN CONUS AND CANADIAN COAST. MORNING LOW TEMPERATURES WILL LIKELY START OUT AT OR BELOW FREEZING FOR MANY LOW-LYING RURAL AREAS WITH CLEAR SKIES AND ONLY LIGHT NORTHERLY WINDS IN PLACE ACROSS THE REGION. THIS TROUGH WILL SPREAD SOME LIFT OVER THE CWA AS IT MOVES THROUGH.
326 AM CST THU DEC 3 2015 Weather pattern continues to support warmer than seasonal normal temperatures and primarily dry conditions through the next seven days.
AN UPPER TROUGH CURRENTLY PUSHING INTO THE PACIFIC NW AS AN AMPLIFIED RIDGE EXTENDS OVER THE INTERMOUNTAIN WEST. AN UPPER TROUGH ALSO EXTENDS OVER THE EASTERN GREAT LAKES REGION. AS THE UPPER RIDGE MOVES OVER THE NRN AND CENTRAL PLAINS TODAY. H85 TEMPS ARE FORECAST TO BE SIMILAR TO ABOUT 1C WARMER THAN WHAT OCCURRED WEDNESDAY. EXISTING SNOWPACK WILL DICTATE WHERE THE COOLER TEMPERATURES RESIDE. WITH A NOTICEABLE GRADIENT TO WARMER HIGHS IN THE UPPER 40S AND LOWER 50S FROM SERN PNHDL AND SWRN NEBR. THE UPPER TROUGH WILL MOVE THROUGH THE WEST COAST INTO THE INTERMOUNTAIN WEST.
204 AM CST THU DEC 3 2015 The upper level low that has impacted our weather the past several days will off to the east into the northeastern U.
THERE WAS A WIDE RANGE IN THE MINS THIS MORNING WITH MINS COLDER THAN GUIDANCE WHERE THE SNOW IS AND WARMER THAN GUIDANCE WHERE THERE IS NOTHING ON THE GROUND. SO POSSIBLE MINS MAY BE WARMER IN THE WEST IF THESE CLOUDS COME IN FASTER.
THE COLD FRONT AND SYSTEM THAT PRODUCED THE WET CONDITIONS HAS MOVED WELL EAST OF THE REGION. TO EAST OF THE BLUE RIDGE AND THE NE CORNER OF THE GULF. AS A REINFORCING SURGE OF COOLER AIR MOVES SOUTHWARD. WITH THE LOW CLOUDS MOVING IN LATE TONIGHT ALSO HELPING. A SURGE OF SOMEWHAT COOLER AIR MOVING SOUTHWARD FROM THE OHIO VALLEY WILL BRING VFR CLOUDS DURING THE LATE NIGHT AND THU MORNING.
THE FLOW ALOFT WILL WEAKEN AS THE AXIS OF A RIDGE OF HIGH PRESSURE SHIFTS INTO WESTERN COLORADO. OVERALL SIMILAR TO TODAY EXCEPT THAT TEMPERATURES WILL BE A LITTLE COOLER BY A DEGREE OR TWO. MODELS HAVE AN UPPER RIDGE OVER THE CWA THURSDAY NIGHT.
1001 PM CST WED DEC 2 2015 THE BACK EDGE OF THE CIRRUS SHIELD ASSOCIATED WITH THE LONGWAVE TROUGH EXTENDING FROM S TX NE ACROSS THE GULF COAST AND MID- ATLANTIC STATES HAS NOW SHIFTED JUST E OF THE REGION THIS EVENING. WITH MUCH DRIER AIR IN THE TROUGH/S WAKE YIELDING A CLEAR SKY AREAWIDE TONIGHT. SFC RIDGING CONTINUES TO BUILD ESE INTO THE SRN PLAINS THIS EVENING. 03Z TEMPS HAVE FALLEN INTO THE LOWER/MID 40S. WITH NEAR FREEZING TEMPS POSSIBLE OVER SCNTRL AND PORTIONS OF SW AR AND ADJACENT SECTIONS OF SE OK.
Highs will be warmer today in the middle 40s to near 50, generally near seasonal averages.
322 AM EST THU DEC 3 2015 LOW PRESSURE OVER THE THE GULF OF MAINE WILL RAPIDLY INTENSIFY AS IT MOVES NORTHEAST INTO THE MARITIMES TODAY. A NARROW RIDGE OF HIGH PRESSURE WILL BUILD OVER THE REGION TONIGHT.
426 AM EST THU DEC 3 2015 A COLD FRONT WILL MOVE OFF THE COAST EARLY THIS MORNING. HIGH PRESSURE WILL BUILD IN FROM THE NORTHWEST THROUGH TONIGHT AND EXTEND OVER THE AREA FROM THE NORTH OVER THE WEEKEND.
TEMPERATURES WILL REMAIN ABOVE FREEZING OVERNIGHT. AHEAD OF AN ELONGATED TROUGH ORIENTED SOUTHWEST TO NORTHEAST OVER THE STATE. A REINFORCING COLD FRONT PUSHED THROUGH THE AREA THIS MORNING. WEAK RIDGING AND SUBSIDENCE WILL REMAIN OVERHEAD THROUGH THE END OF THE WORK WEEK.
THIS EVENING THROUGH THURSDAY NIGHT UPPER RIDGING IS BUILDING ACROSS THE WRN THIRD OF THE CONUS TODAY. BUT THE LOW LEVELS ARE TOO DRY FOR ANY PRECIP TO REACH THE GROUND. THERE COULD BE A 20 DEGREE DIFFERENCE BETWEEN VALLEYS AND HIGHER MORE EXPOSED RIDGES. HIGH PRESSURE WILL TRANSITION TO THE EAST ACROSS THE GREAT PLAINS INTO THE MS VALLEY. UPPER RIDGE AXIS WILL CROSS THE REGION BRINGING US ANOTHER DAY OF SUNNY SKIES AND MILD TEMPS.
1229 AM EST THU DEC 3 2015 A COLD FRONT MOVES THROUGH EASTERN ZONES DURING THE OVERNIGHT HOURS. LOW PRESSURE WILL THEN MOVE ACROSS THE GULF OF MAINE ON THURSDAY.
Currently, there is northwest flow over the CWA with an upper trough over the northeastern conus and another trough just off the west coast.
200 AM PST THU DEC 3 2015 LOW PRESSURE WILL MOVE ACROSS THE WEST COAST TODAY. HIGH PRESSURE WILL BUILD THROUGH THE WEEKEND BRINGING DRY AND WARMER CONDITIONS. TROUGH WILL SWING ACROSS THE WEST COAST TODAY/TONIGHT.
/ISSUED 331 PM CDT MON MAR 21 2016/ ONE MORE SHOT OF UNSEASONABLY COOLER TEMPERATURES EXPECTED AREA WIDE TONIGHT AS THE CENTER OF HIGH PRESSURE MOVES OVER THE REGION. EXPECT WINDS TO SHIFT BACK TO THE SOUTH ALLOWING FOR WARMER AND MORE HUMID CONDITIONS TO RETURN TO THE AREA IN ANTICIPATION OF THE NEXT STORM SYSTEM.
THIS SEEMS REASONABLE AS THE PRESSURE GRADIENT TIGHTENS IN RESPONSE TO DEEPENING LOW PRESSURE OVER THE WESTERN PLAINS. /ISSUED 936 PM CDT MON MAR 21 2016/ OVERNIGHT FORECAST REMAINS ON TRACK WITH ONSHORE FLOW AND RETURNING MOISTURE ONLY ALLOWING LOW TEMPERATURES TO FALL INTO THE MID 40S TO MID 50S /ALMOST 15 DEGREES WARMER THAN THIS MORNING FOR SOME LOCATIONS/. A DEVELOPING LOW PRESSURE SYSTEM OVER THE HIGH PLAINS WILL RESULT IN INCREASINGLY BREEZY SOUTHERLY WINDS THROUGHOUT THE DAY /15-25 MPH WITH STRONGER GUSTS POSSIBLE/ AND WIND SPEEDS DURING THE DAY WERE INCREASED AS A RESULT. /ISSUED 335 PM CDT MON MAR 21 2016/ SURFACE ANALYSIS THIS AFTERNOON HAS HIGH PRESSURE OVER THE NW GULF OF MEXICO WITH LIGHT SOUTHERLY WINDS ACROSS THE AREA. WATER VAPOR IMAGERY SHOWS SOME WEAK RIDGING ALOFT IN WAKE OF THE DOWNSTREAM TROUGH AXIS.
852 PM MDT MON MAR 21 2016 ENERGETIC EVENING TONIGHT AS AN UPPER TROUGH MOVES INTO OREGON APPROACHES THE REGION. THE MAIN UPPER TROUGH AND FRONT PUSH ACROSS THE IDAHO/OREGON BORDER AROUND MIDNIGHT.
EXPECT ANOTHER DRY AND SEASONABLY COOL DAY WITH HIGH PRESSURE OVER THE REGION.
SURFACE MAP SHOWED A 1028MB PRESSURE RIDGE CENTERED OFF THE SOUTHERN LA COAST AND A 1000MB PRESSURE TROF OVER THE BLACK HILLS OF SD. THE OVERNIGHT WILL SEE LOW LEVEL PRESSURE GRADIENT TIGHTEN SLIGHTLY AS THE NORTHERN GULF PRESSURE RIDGE MOVES OFF TO SOUTHERN GA/NORTHERN FL. 19Z SURFACE ANALYSIS PLACES A RIDGE OF HIGH PRESSURE OVER LOUISIANA AND TEXAS. A RIDGE OF HIGH PRESSURE LOCATED NEAR THE TEXAS/LOUISIANA GULF COAST WILL GRADUALLY BEGIN TO MOVE EAST TONIGHT INTO TUESDAY MORNING. SOUTHERLY WINDS WILL BEGIN TO RETURN ON THE BACK SIDE OF HIGH PRESSURE AND THIS MAY LIMIT FROST POTENTIAL ACROSS THE REMAINDER OF THE FORECAST AREA. SHORT TERM MODELS INDICATE A LOW LEVEL JET WILL BEGIN TO DEVELOP ACROSS PORTIONS OF THE LOWER MISSISSIPPI VALLEY ON TUESDAY.
Only made minor changes to increase sky cover a bit overnight as high-level cirrus spills over ridge axis and into the area. Will see lows in the low to mid 40s. Went close to the warmer GFS MOS guidance for Tuesday as the NAM MOS looks too cool.
WITH SEVERAL BOUNDARIES SETTING UP WITH A WARM FRONT ACROSS THE NORTH AND DRYLINE SOUTHWEST.
OVERALL FORECAST IS STILL ON TRACK WITH EXPECTED OVERNIGHT LOWS TO DIP DOWN TO NEAR OR BELOW FREEZING. CHATTANOOGA AIRPORT, TN 35 66 45 68 / 0 0 0 10 KNOXVILLE MCGHEE TYSON AIRPORT, TN 33 64 45 70 / 0 0 0 0 OAK RIDGE, TN 33 65 45 69 / 0 0 0 10 TRI CITIES AIRPORT, TN 29 63 37 71 / 0 0 0 0 NC.
1157 PM EDT MON MAR 21 2016 HIGH PRESSURE BUILDS INTO THE AREA FROM THE WEST THROUGH TUESDAY MORNING.
AN UPPER LEVEL LOW PRESSURE TROF WILL MOVE THROUGH THE PACIFIC NORTHWEST TONIGHT. AN ASSOCIATED COLD FRONT WILL CROSS THE CANADIAN BORDER EARLY MORNING AND BRING MUCH COOLER AIR INTO THE REGION. AN UPPER LEVEL LOW PRESSURE TROF WILL MOVE OVER THE WEST COAST THIS EVENING. MOIST, SOUTHWEST FLOW ALOFT AHEAD OF THIS TROF WILL BRING INCREASING CLOUDS ACROSS THE ROCKIES. AN ASSOCIATED COLD FRONT WILL MOVE OUT OF CANADA AND THROUGH KCTB AROUND 09Z.
THE ONSHORE WIND WILL INCREASE THE LOW LEVEL MOISTURE INTO S TX LEADING TO INCREASING CLOUDS AND HUMIDITY AS WELL AS WARMING TEMPS.
Will see lows in the low to mid 40s. Went close to the warmer GFS MOS guidance for Tuesday as the NAM MOS looks too cool.
A LEE TROUGH WILL MAINTAIN A FAIRLY TIGHT PRESSURE GRADIENT ACROSS KANSAS TONIGHT. AN UPPER LEVEL TROUGH OVER THE EASTERN PACIFIC WILL SLIDE INTO THE CENTRAL/SOUTHERN ROCKIES LATER TUESDAY-TUESDAY NIGHT.
930 PM EDT MON MAR 21 2016 HIGH PRESSURE WILL SHIFT EAST OF THE AREA ON TUESDAY.