Aikyam-Lab/Synoptic-Bench huggingface dataset:
957 AM EDT TUE JUN 9 2015 A TROUGH OF LOW PRESSURE OVER THE AREA EARLY THIS MORNING WILL MOVE EAST AS WEAK HIGH PRESSURE BUILDS IN FROM THE LOWER OHIO VALLEY. TONIGHT LOW PRESSURE WILL MOVE ACROSS THROUGH THE NORTHERN GREAT LAKES REACHING QUEBEC ON WEDNESDAY. A COLD FRONT TRAILING THE LOW WILL DROP ACROSS THE AREA WEDNESDAY NIGHT.
AN UPPER LEVEL TROUGH AXIS WAS JUST TO THE WEST WHILE ATLANTIC HIGH PRESSURE RIDGED IN ACROSS FL. THE PREVAILING FLOW AND SEA BREEZE WILL RESULT IN THE HIGHEST COVERAGE OVER INTERIOR AREA. HIGH PRESSURE WILL EASE SOUTHWARD TODAY WITH PREVAILING SW TO WEST WINDS ENHANCED BY AN AFTERNOON SEA BREEZE.
/ISSUED 435 AM CDT TUE JUN 9 2015/ DRIER AIR IN THE MID AND UPPER LEVELS WILL MOISTEN SOME TODAY AS UPPER LEVEL RIDGING CONTINUES TO BUILD OVER NEW MEXICO AND DRAW UP MOISTURE FROM THE TROPICS AND REMNANTS OF TD BLANCA. UPPER LEVEL RIDGING RETREATS BACK OVER MEXICO AS UPPER LEVEL LOW MOVES ONSHORE OVER CALIFORNIA.
ONE IS AN INFLUX OF TROPICAL MOISTURE AND THE OTHER IS THE STEERING FLOW SHIFTING TO THE WEST AND SOUTHWEST IN THE LOWER TO MID LEVELS. THE GUIDANCE CONSENSUS INDICATES THAT MOISTURE CONTINUING TO LIFT NORTHWARD AS THE LOW LEVEL FLOW BECOMES MORE SOUTHERLY TODAY AND WEDNESDAY. EVEN THOUGH THE GUIDANCE TREND THE LAST FEW DAYS HAS BEEN INDICTING A WEAK UPPER LEVEL RIDGE BUILDING INTO THE EASTERN GULF TODAY INTO WEDNESDAY. THE HIGH MOISTURE CONTENT AND THE DIURNALLY DRIVEN CONVECTION IS NOT FORECAST TO BE HAMPERED WITH THE GUIDANCE INDICATING SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS ACROSS THE PENINSULA.
906 AM CDT TUE JUN 9 2015 COLD FRONT HAS PUSHED THROUGH NORTHERN AND WESTERN PORTIONS OF THE AREA. CURRENT SURFACE ANALYSIS INDICATES A COLD FRONT EXTENDING FROM A LOW IN CENTRAL MANITOBA SOUTHWESTWARD TO ANOTHER LOW NEAR THE BORDER OF SASKATCHEWAN/MANITOBA/NORTH DAKOTA.
634 AM CDT TUE JUN 9 2015 OBSERVED AND FORECAST SOUNDING DATA SHOWS DEWPOINTS IN THE LOW 60S THIS MORNING SHOULD RESULT IN LITTLE IN THE WAY OF FOG FORMATION IN THE EARLY MORNING DUE TO SHALLOW MOISTURE DEPTH/DECREASE IN MIXING RATIO WITH HEIGHT. CENTRAL ILLINOIS WILL REMAIN IN NORTHWESTERLY FLOW ALOFT BETWEEN UPPER LEVEL RIDGING OVER THE WESTERN U. AND TROUGHING OVER THE EASTERN U.
904 AM CDT TUE JUN 9 2015 TWENTY-FOUR HOUR TEMPERATURE CHANGES SHOW 3 TO 5 DEGREES WARMER ACROSS NORTHERN OKLAHOMA TODAY AS COMPARED TO THE CLEAR SKIES YESTERDAY.
1247 PM EDT TUE JUN 9 2015 AN UPPER LEVEL TROUGH OF LOW PRESSURE WILL MOVE ACROSS THE REGION TODAY THROUGH EARLY TONIGHT. ANOTHER UPPER LEVEL TROUGH OF LOW PRESSURE WILL MOVE ACROSS THE REGION LATE WEDNESDAY AFTERNOON AND NIGHT. UPPER TROUGH MOVES EAST OF THE REGION TONIGHT AND SHOWERS WILL BE COMING TO AN END SHORTLY AFTER MIDNIGHT. ANOTHER UPPER TROUGH WILL BE MOVING TOWARD THE REGION LATE IN THE DAY.
HIGHS WILL BE A FEW DEGREES COOLER THAN YESTERDAY BUT STILL WELL ABOVE NORMAL WITH LOW TO MID 80S FOR PARTS OF THE INTERIOR. THIS WILL STRENGTHEN THE LOW LEVEL ONSHORE FLOW A BIT.
735 AM EDT TUE JUN 9 2015 A COLD FRONT OVER WESTERN PENNSYLVANIA AND WILL CLEAR MOST OF THE REGION BY MIDDAY. AN UPPER LEVEL TROUGH WILL CROSS THE REGION TODAY AND WILL CREATE ADDITIONAL SHOWERS AND THUNDERSTORMS. THE MAIN UPPER TROUGH APPEARS TO BE JUST TO THE WEST OF THE AREA AT 2 AM. THE HIGHEST POPS WILL BE OVER THE NWRN THIRD OF THE AREA THIS MORNING. WILL CONTINUE WITH THE THOUGHT LINE OF U60S IN THE FAR NW AS 8H TEMPS DIP TO +10 AND EARLY CLOUDS/RAIN WILL KEEP IT COOLER THERE. MOST WILL BE DRY AND CLEARING SKIES WILL RESULT AS STRONG SUBSIDENCE OCCURS POST-TROUGH-AXIS PASSAGE. VERY MINOR RIDGING AT THE SFC WILL PROVIDE JUST 18 TO 24 HRS OF DRY/NO RAIN.
HIGH PRESSURE WILL ALLOW FOR DRY WEATHER THROUGH WEDNESDAY MORNING. A RIDGE OF HIGH PRESSURE WILL SETUP ACROSS THE SOUTHERN STATES ALLOWING A MOIST SOUTHERLY FLOW OFF THE GULF TO FEED NORTH ACROSS THE OHIO VALLEY. A VARIOUS UPPER DISTURBANCES THAT WILL RIDE UP OVER THE RIDGE AND ACROSS CENTRAL INDIANA.
1130 AM EDT TUE JUN 9 2015 A COLD FRONT SETTLES INTO THE AREA TODAY AND DISSIPATES OVER THE CAROLINAS WEDNESDAY.
WE SHOULD SEE A NICE RECOVERY IN TEMPERATURES TODAY WITH HIGHS CLIMBING BACK INTO THE LOWER 80S. LARGE SCALE UPPER TROUGH CURRENTLY OVER THE REGION WILL LIFT OUT TO THE NE BY THE START OF THE PERIOD.
LOWS TONIGHT ARE EXPECTED TO BE IN THE LOW TO MID 60S AND HIGHS WEDNESDAY WILL BE INTO THE MIDDLE 80S. HIGH PRESSURE WAS IN PLACE ACROSS MISSOURI AND THE TENNESSEE VALLEY. WEAK RIDGING IN PLACE ALOFT ACROSS THE WESTERN UNITED STATES CONTINUES TO ALLOW A QUICK NW FLOW ACROSS NORTHERN INDIANA. HAVE ALSO TRENDED TEMPS SLIGHTLY COOLER GIVEN THE ADDITIONAL CLOUD COVER. HAVE TRENDED TEMPS SLIGHTLY COOLER NEAR THE LAKE. PATCHY GROUND FOG HAD DEVELOPED OVERNIGHT FROM FAR SOUTHERN LOWER MICHIGAN INTO NORTHWEST INDIANA BEHIND A WEAK COLD FRONT. A SHORT WAVE TROF WILL DROP SOUTHEAST TONIGHT TOWARD LOWER MICHIGAN. WITHIN THERMAL RIDGE AND STRONG INSOLATION/POOLED SFC DPS IN UPR 60S/NEAR 70. WEAK HIGH PRESSURE ACROSS THE REGION THIS AFTERNOON. HIGH PRESSURE RIDGE SHIFTS EAST WEDNESDAY AS SOUTHERLY FLOW DEVELOPS AHEAD OF A FRONTAL BOUNDARY MOVING INTO THE GREAT LAKES.
LOWS TONIGHT ARE EXPECTED TO BE IN THE LOW TO MID 60S AND HIGHS WEDNESDAY WILL BE INTO THE MIDDLE 80S. HIGH PRESSURE WAS IN PLACE ACROSS MISSOURI AND THE TENNESSEE VALLEY. WEAK RIDGING IN PLACE ALOFT ACROSS THE WESTERN UNITED STATES CONTINUES TO ALLOW A QUICK NW FLOW ACROSS NORTHERN INDIANA. HAVE ALSO TRENDED TEMPS SLIGHTLY COOLER GIVEN THE ADDITIONAL CLOUD COVER. HAVE TRENDED TEMPS SLIGHTLY COOLER NEAR THE LAKE. PATCHY GROUND FOG HAD DEVELOPED OVERNIGHT FROM FAR SOUTHERN LOWER MICHIGAN INTO NORTHWEST INDIANA BEHIND A WEAK COLD FRONT. A SHORT WAVE TROF WILL DROP SOUTHEAST TONIGHT TOWARD LOWER MICHIGAN. WITHIN THERMAL RIDGE AND STRONG INSOLATION/POOLED SFC DPS IN UPR 60S/NEAR 70.
1020 AM EDT TUE JUN 9 2015 AN H85-H30 SHORT WAVE TROF EXTENDING FM HUDSON BAY TO THE MOUTH OF THE MS RIVER WILL KEEP THE ATLC RIDGE AXIS SUPPRESSED OVER THE FL STRAITS. LIGHT TO GENTLE S/SW BREEZE ACRS THE LCL ATLC THIS MRNG DUE TO A SFC/LOW LVL HI PRES RIDGE OVER THE FL STRAITS.
THE 8 AM EDT REGIONAL SURFACE ANALYSIS SHOWED A RIDGE ALONG THE FL PENINSULA, AND AN EAST-WEST ORIENTED TROUGH ACROSS CENTRAL AL AND MS, WHICH WAS ASSOCIATED WITH AN MCS.
LATEST WATER VAPOR SATELLITE IMAGERY SHOWS THE OFFSHORE UPPER LEVEL LOW IS NOW CENTERED ABOUT 420 MILES SW OF SAN FRANCISCO AND DRIFTING SLOWLY NORTHWARD. IT HAS NOW ENTRAINED SIGNIFICANT MID AND UPPER LEVEL MOISTURE FROM THE REMNANTS OF TROPICAL CYCLONE BLANCA AND BEGUN ADVECTING IT RAPIDLY NORTHWARD.
AS THE UPPER TROUGH AXIS AND EMBEDDED DISTURBANCE CONTINUE TO GRADUALLY TRANSLATE SEWD ACROSS THE REGION. AS A WEAK RIDGE PATTERN ALOFT RETURNS TO MUCH OF THE SE STATES WHILE THE SLY FLOW AT THE SFC WEAKENS.
634 AM CDT TUE JUN 9 2015 QUIET CONDITIONS ACROSS THE AREA RIGHT NOW AS A WEAK RIDGE OF HIGH PRESSURE WAS PUSHING ACROSS THE UPPER MISSISSIPPI RIVER VALLEY REGION INTO THE GREAT LAKES REGION. IR SATELLITE SHOWING SCATTERED ALTOCUMULUS ACROSS THE AREA IN RESPONSE TO 850-700MB ISENTROPIC UPGLIDE/MOISTURE TRANSPORT PUSHING EAST OUT OF THE NORTHERN PLAINS AHEAD OF LOW PRESSURE/COLD FRONT ALONG THE US/MT/ND BORDER.
HIGH PRESSURE WILL CONTINUE TO KEEP THE AIRMASS DRY. TEMPS WILL BE A BIT COOLER TODAY AS A COLD FRONT HAS SLID SOUTH ACROSS THE CANADIAN BORDER. A CANADIAN COLD FRONT CONTINUES TO PUSH SOUTHWARD THRU NORTH CENTRAL MT THIS MORNING. THIS COLD FRONT WILL STALL OUT SOUTH OF A GREAT FALLS TO LEWISTOWN LINE.
AS THE UPPER RIDGE CONTINUES TO RETREAT SWWD INTO W TX AND A WEAK FRONT LINGERS ACROSS PARTS OF OUR REGION. THIS TROUGH HAS PROVIDED JUST ENOUGH VERTICAL ASCENT TO SUPPORT SCATTERED CONVECTION THROUGH MUCH OF THIS EARLY MORNING ALONG A WEAK FRONT OVER SRN AR. SEVERAL OF THE HIGHER RESOLUTION SHORT-TERM MODELS INDICATE THE MOISTURE GRADIENT WILL TIGHTEN SOME TODAY MAKING THE FRONT MORE DEFINED.
AN UPPER TROUGH IS SITUATED OVER THE GREAT LAKES/NORTHEAST WITH A RIDGE OVER THE WESTERN HALF OF THE COUNTRY. BILLINGS WRIGHT TODAY AND WEDNESDAY WILL CONTINUE TO BE DOMINATED BY WARM TO HOT TEMPERATURES AS THE RIDGE AMPLIFIES TODAY BEFORE FLATTENING OUT AS THE REMNANTS OF BLANCA COME ON SHORE AND MOVE TOWARDS THE CENTRAL CONUS. DEVELOPING OVER THE HIGH PLAINS AND MOVING EASTWARD OVERNIGHT.
1135 AM CDT TUE JUN 9 2015 AN UPPER TROUGH IS SITUATED OVER THE GREAT LAKES/NORTHEAST WITH A RIDGE OVER THE WESTERN HALF OF THE COUNTRY. THE RAP RUNS YESTERDAY MORNING WERE REALLY GOOD WITH THE HIGHS. WENT WITH THAT FOR THIS AFTERNOON WHICH RESULTED IN WARMER HIGHS FOR TODAY. KRC TODAY AND WEDNESDAY WILL CONTINUE TO BE DOMINATED BY WARM TO HOT TEMPERATURES AS THE RIDGE AMPLIFIES TODAY BEFORE FLATTENING OUT AS THE REMNANTS OF BLANCA COME ON SHORE AND MOVE TOWARDS THE CENTRAL CONUS. DEVELOPING OVER THE HIGH PLAINS AND MOVING EASTWARD OVERNIGHT.
A WEAK COLD FRONT WILL BRING SHOWERS TO THE AREA SATURDAY AND SATURDAY NIGHT.
STEADY PUSH OF COLD ADVECTION TODAY AS COLD CANADIAN HIGH PRESSURE BUILDS IN.
STILL LOOKING AT RIDGING ALOFT WHICH WILL KEEP TEMPS ON THE SEASONAL SIDE FOR THE NEXT SEVERAL DAYS.
SOME CLEARING IS EVIDENT ACROSS LASSEN COUNTY THROUGH THE TAHOE BASIN WHICH MAY PROMOTE SOME PATCHY AREAS OF FREEZING FOG FOR THE TRUCKEE AREA AND THE SIERRA VALLEY THIS MORNING.
06Z SFC DATA HAS LOW PRESSURE IN EASTERN KANSAS NEAR KEMP. AN INVERTED TROF RAN FROM THE LOW NORTH NORTHEAST INTO CENTRAL IOWA AND THEN SOUTHEAST MINNESOTA. THE THICKER FOG WAS CONFINED NEAR THE INVERTED TROF ACROSS CENTRAL IOWA BUT SOME PATCHY FOG WAS DEVELOPING IN EASTERN IOWA. FOG WILL ALSO BECOME MORE WIDESPREAD WEST OF THE MISSISSIPPI AS THE INVERTED TROF MOVES INTO THE AREA. THE THICKEST FOG WILL BE AT AND NEAR THE INVERTED TROF THROUGH SUNSET. COLDER AIR WILL SWEEP INTO THE AREA AS THE LOW MOVES INTO THE NORTHERN GREAT LAKES.
THE EXCEPTION BEING ALONG THE CHEYENNE RIDGE AND SOUTHERN LARAMIE RANGE WHERE UPSLOPE FLOW COULD HELP SQUEEZE OUT ANOTHER INCH OF ACCUMULATION YET THIS MORNING.
/ISSUED 323 AM EST FRI JAN 8 2016/ A TROUGH OVER THE EASTERN GULF OF MEXICO WILL MOVE ACROSS SOUTH FLORIDA EARLY THIS AFTERNOON. THE TROUGH EXITS THE AREA THIS EVENING.
NOW WHILE MOST SPOTS ARE WELL ABOVE FREEZING THIS MORNING SOME OF THE DEEPER VALLEYS ARE STARTING OFF IN THE LOWER 30S.
THERE MAY BE A MIX OF DRIZZLE/FREEZING DRIZZLE DEPENDING ON THE AIR TEMPERATURE. SOME FLURRIES MAY LINGER TO THE EAST AS THE UPPER TROUGH EXITS TO THE EAST.
THE COMPACT UPPER LOW THAT MOVED ACROSS THE NORTHERN PANHANDLES YESTERDAY WAS NEARING THE KANSAS CITY AREA. WITH THE NEXT UPPER LOW OF INTEREST OVER THE UT/AZ BORDER. A FREEZING FOG ADVISORY WAS ISSUED EARLIER FOR SOUTHERN AND WESTERN PORTIONS OF THE TX PANHANDLE. BOTH AS THE STRATUS CONTINUES TO EXPAND SOUTH AND AS INCREASED FORCING AHEAD OF THE APPROACHING UPPER LOW STARTS TO INCREASE MIXING. THE FOCUS WILL THEN SHIFT TO SNOW EXPECTED TO EXPAND ACROSS THE PANHANDLES TODAY AND TONIGHT AS THE UPPER LOW CURRENTLY JUST WEST OF THE FOUR CORNERS MOVES EAST/SOUTHEAST ACROSS NORTHERN NM TODAY AND ACROSS THE PANHANDLES THIS EVENING.
HIGH TEMPERATURES TODAY WILL RANGE FROM THE LOWER/MID 60S FROM I-10 NORTHWARD.
745 AM EST FRI JAN 8 2016 A WEAK LOW PRESSURE SYSTEM WILL TRACK WEST OF PENNSYLVANIA THROUGH THE GREAT LAKES LATE TODAY AND TONIGHT.
AN UPPER LOW WILL MOVE OFF TO THE EAST TODAY. A MOIST NORTHWEST FLOW IN THE WAKE OF THIS LOW WILL CONTINUE OVER THE AREA INTO FRIDAY NIGHT.
A warm front extending southeast from a storm system over the plains will lift northeast across the region today. In the process it will drag a cold front into the western sections of our CWA by midnight tonight, but it's eastward progress will effectively be temporarily brought to a halt due to a surface developing on the front to our southwest. In the wake of the low and front, temperatures will cool from the 50s around midday Saturday into the 30s by midnight. Thankfully the higher QPF will be mainly north and east of our CWA by the time the deeper cold (sub-freezing) air overspreads the area, otherwise snow amounts would be higher. High pressure in the wake of the system will keep the region dry and cold through the rest of the period. ridge.
A PIECE ALONG THE SOUTHERN FLANK OF THE TROUGH AXIS BRIEFLY FLOURISHED THIS MORNING WELL TO THE WEST OF THE FLORIDA KEYS. A FEW PATCHES OF LIGHT RAIN ARE STREAKING ACROSS THE LOWER KEYS AT THIS HOUR. A SMALL AREA OF LOW PRESSURE WILL MOVE ACROSS CENTRAL FLORIDA FROM THE EASTERN GULF OF MEXICO. ANOTHER LOW PRESSURE SYSTEM OVER THE LOWER MISSISSIPPI VALLEY WILL MOVE QUICKLY NORTH NORTHEASTWARD SATURDAY.
A COLD FRONT WILL PASS THROUGH THE REGION TONIGHT INTO SATURDAY MORNING THAT WILL BRING DRIER AIR INTO THE REGION. AN APPROACHING UPPER LOW FROM THE GREAT BASIN HAS CARVED A DEEP TROUGH INTO NRN MEXICO. UNIFORM WESTERLIES FROM A PACIFIC FRONT DEVELOPS OVER SOUTH CENTRAL TX AS THE UPPER LOW PULLS NE EARLY SATURDAY MORNING.
SCATTERED SHOWERS WILL CONTINUE TO MOVE ACROSS SOUTH FLORIDA THROUGH THE MORNING HOURS AS A TROUGH MOVES ACROSS THE REGION. /ISSUED 323 AM EST FRI JAN 8 2016/ A TROUGH OVER THE EASTERN GULF OF MEXICO WILL MOVE ACROSS SOUTH FLORIDA EARLY THIS AFTERNOON. THE TROUGH EXITS THE AREA THIS EVENING.
CHATTANOOGA AIRPORT, TN 56 44 55 39 / 10 10 80 80 KNOXVILLE MCGHEE TYSON AIRPORT, TN 57 40 55 41 / 10 10 70 70 OAK RIDGE, TN 57 41 54 39 / 10 10 80 70 TRI CITIES AIRPORT, TN 54 34 54 40 / 10 10 70 80.
AN UPPER LOW OVER THE HUDSON BAY AREA ALONG WITH A RIDGE OF HIGH PRESSURE OFF THE WEST COAST WILL COMBINE TO BRING A DIRECT NORTHERLY FLOW ALOFT ACROSS MONTANA. CURRENT TEMPEATURES ACROSS THE AREA ARE IN THE TEENS AND THESE READINGS WILL BE THE HIGHS TODAY AS TEMPERATURES WILL REMAIN STEADY OR SLOWLY FALL DURING THE DAY. TEMPERATURES WILL REMAIN COLD WITH HIGHS ONLY IN THE LOWER TO MIDDLE TEENS. THE EXCEPTION WILL BE THE FAR WESTERN FOOTHILLS AREAS WHERE A WEAK DOWNSLOPE FLOW MAY RESULT IN TEMPERATURES IN THE LOWER 20S.
BOTTOMING OUT IN THE LOWER TO MID 20S. IT LOOKS LIKE SNOWFALL AMOUNTS WILL COME IN ON THE LOW SIDE. WITH UP TO AN INCH IN THE MOUNTAINS AND EVEN LESS ACROSS THE LOWER ELEVATIONS. THE STRATUS AND FOG SHOULD GRADUALLY ERODE EASTWARD DURING THE LATE MORNING HRS AS TEMPS RISE TEMPS AND WITH DRIER AIR MIXING DOWN OFF THE FRONT RANGE AND CHEYENNE RIDGE.
THE APPROACH OF AN OVERNIGHT COLD FRONT MAY BE ACCOMPANIED BY A LEADING EVENING PRE-FRONTAL TROUGH THAT WILL TEMPORARILY LOWER CEILINGS/VISBYS THROUGH THE EARLY (OVERNIGHT SATURDAY) MORNING HOURS. THIS AFTERNOON'S HIGH TEMPERATURES COULD END UP BEING A DEGREE OR TWO COOLER THAN PREVIOUS FORECAST DUE TO INCREASING CLOUD COVER. MID/UPPER LEVEL LOW IN THE NORTHERN ARIZONA AREA EARLY THIS MORNING MOVES RAPIDLY EASTWARD TODAY AND TONIGHT AND HELPS TO BRING US OUR NEXT SHOT OF RAIN. THIS STORM SYSTEM DRAGS A STRONG COLD FRONT THROUGH THE AREA LATE TONIGHT THROUGH EARLY TOMORROW MORNING.
517 AM CST FRI JAN 8 2016 THE MSL ANALYSIS AT 08Z SHOWED LOW PRESSURE CENTERED OVER NORTHEAST KANSAS. ARCTIC HIGH PRESSURE WILL BE BUILDING SOUTHEAST ACROSS THE NORTHERN AND HIGH PLAINS SATURDAY. ALTHOUGH SLIGHTLY COOLER OVER THE DEEPER SNOW PACK. BY SUN EARLY MORNING 850 MB TEMPS WILL BEGIN TO RISE AS THE CENTER OF THE HIGH PUSHES EAST TOWARDS THE MISSOURI RVR VALLEY. THE HIGH WILL BE OVERHEAD EARLY IN THE NIGHT AND EXPECT CLEAR SKIES TO COMBINE WITH NEAR CALM WINDS FOR EXCELLENT RADIATIONAL COOLING TO TAKE PLACE. ALTHOUGH THEY MAY FALL QUICKLY TO THESE LOWS THEN HOLD STEADY AS THE HIGH PUSHES EAST.
THAT SAID WATER VAPOR IMAGERY STILL SHOWS A RATHER POTENT JET STREAM COMING OUT OF MEXICO AND UPPER LOW OVER THE S ROCKIES.
BROAD UPPER LOW WAS TRACKING TO THE FOUR CORNERS THIS MORNING.
DRY TODAY UNDER HIGH PRESSURE. BUT A WARM FRONT APPROACHES THE NORTH BAY TONIGHT WITH RAIN DEVELOPING.
A cold front will move south across the northern terminals tonight, shifting winds to the northwest. A short wave trough will skirt across the southern Rockies today and across the southern Plains tonight. This system will drag a cold front south across the area overnight and will usher in colder temperatures for Saturday. Lows tonight will be mainly in the lower and middle 30s.
A WARM FRONT HAS PUSHED NORTH THROUGH THE AREA. THE UPPER TROUGH TAKES ON A NEGATIVE TILT ON SATURDAY AS IT SWINGS THROUGH THE MIDSOUTH.
437 AM MST FRI JAN 8 2016 12Z TAF CYCLE CLOSED UPPER LOW CENTER LOCATED OVER NORTHEAST AZ AT 12Z WILL BE CENTERED NEAR KABQ AROUND 18Z. BACKDOOR COLD FRONT DROPS INTO NE NM LATE MORNING WITH MODERATE TO STRONG N-NE WINDS DEVELOPING BEHIND THE FRONT DURING THE AFTERNOON. BUT THE FOCUS WILL SHIFT TO NORTHEAST PORTIONS OF THE STATE WHERE A BACKDOOR COLD FRONT WILL ENHANCE SNOWFALL.
COLD FRONT WILL MOVE DOWN THE FRONT RANGE THIS MORNING. COLDER AIR WILL MOVE DOWN THE PLAINS THIS MORNING AND I EXPECT MAX TEMPS TODAY TO GENERALLY REMAIN AT OR BELOW FREEZING THROUGHOUT THE DAY. PUEBLO IS STILL ABOVE FREEZING WITH A TEMP OF 35F.
COLD FRONT. AND UPPER LVL TROUGH APPROACH THE REGION. WITH ENHANCED LOW-LEVEL JET AND FAIRLY DEEP UPPER- LEVEL TROUGH FORECAST TO MOVE ACROSS THE REGION. CONDITIONS TO IMPROVE ON SATURDAY AS A COLD FRONT MOVES ACROSS THE REGION.
A HIGH AMPLITUDE LONG WAVE RIDGE IS CURRENTLY SITUATED OVER THE WEST COAST. AN EL NINO LIKE SUB-TROPICAL JET HAS DEVELOPED WHICH IS STRONG ENOUGH TO PULL SYSTEMS UNDERNEATH/THROUGH THE RIDGE TOWARD CALIFORNIA. MODEL GUIDANCE IS UNANIMOUS THAT AN ACTIVE STORM PATTERN WILL CONTINUE WITH MULTIPLE WEAKENING FRONTS AND LOW PRESSURE SYSTEMS APPROACHING THE COAST. FIGHTING AGAINST THE RIDGE. SOUTHERLY WINDS IN ADVANCE OF THE FRONT WILL LIKELY BRING SOME GUSTS BETWEEN 30 AND 40 MPH TO MOUNTAIN RIDGE TOPS AND SOME COASTAL HEADLANDS. INCLUDING THE HIGHER ELEVATION PORTIONS OF HIGHWAY 36. SOME FREEZING FOG IS POSSIBLE WHICH WOULD RESULT IN SOME ICY ROADS.
656 AM EST FRI JAN 8 2016 HIGH PRESSURE WILL PERSIST OVER EASTERN CANADA THROUGH SATURDAY. A WARM FRONT IS EXPECTED TO MOVE THROUGH THE MID- ATLANTIC STATES TONIGHT.
BUFKIT SOUNDINGS SUGGEST THE POTENTIAL FOR PATCHY LIGHT FREEZING DRIZZLE COMING TO A HALT ACROSS KBIS/KJMS BY 12Z-14Z. WITH THAT SAID WILL LET THE SPECIAL WEATHER STATEMENT ADVERTISING THE PATCHY LIGHT FREEZING DRIZZLE IN SOUTH CENTRAL AND THE JAMES RIVER VALLEY TO CONTINUE THROUGH 14Z FRIDAY. TEMPERATURES IN THE LOW LEVEL MOIST LAYER WILL BE COLD ENOUGH TO SUPPORT ICE CRYSTALS VERSUS SUPERCOOLED WATER DROPLETS.
BROAD LONGWAVE TROUGHING WAS SITUATED ACROSS THE WESTERN AND CENTRAL CONUS. AND ONE DIGGING INTO THE SOUTHERN ROCKIES WERE EMBEDDED WITHIN THIS BROAD TROUGHING. THINKING FREEZING DRIZZLE/DRIZZLE WILL BE POSSIBLE THROUGHOUT MUCH OF THE MORNING AND EVEN POSSIBLY INTO THE AFTERNOON HOURS. CYCLOGENESIS LOOKS TO OCCUR ACROSS THE LOWER MISSISSIPPI RIVER VALLEY DURING FRIDAY NIGHT INTO SATURDAY MORNING.
A COLD FRONT IS EXPECTED TO MOVE ACRS THE REGION TNGT/EARLY SATURDAY. EXPECT THE CORRESPONDING COLD FRONT TO MOVE ACRS THE CWA/MSA TNGT/EARLY SATURDAY AND RESULT IN DRYING ATMOSPHERIC CONDITIONS.
THE TROUGH AXIS PRODUCING THE SHOWERS WILL CONTINUE TO LIFT NORTHEASTWARD. A STRONGER TROUGH WILL APPROACH FROM THE WEST. BUT THE APPROACHING LOW PRESSURE WILL BRING A CHANCE FOR SHOWERS BY DAYBREAK SATURDAY.
A short wave trough will skirt across the southern Rockies today and across the southern Plains tonight. This system will drag a cold front south across the area overnight and will usher in colder temperatures for Saturday. Lows tonight will be mainly in the lower and middle 30s.
SEVERAL AIRCRAFT SOUNDINGS SHOWED THE LOW LAYER COOLING OVERNIGHT. IN SPITE OF THESE FAVORABLE PARAMETERS DENSE FOG HAS BEEN SLOW TO FORM DUE TO LOWERING DEWPOINTS WITH A COLD DOME OF HIGH PRESSURE OVER SE OREGON AND SW IDAHO.
TODAY THROUGH SATURDAY NIGHT EARLY MORNING SURFACE ANALYSIS PLACES A WARM FRONT ROUGHLY BISECTING ARKANSAS FROM NORTHWEST TO SOUTHEAST. HIGH MOISTURE CONTENT BELOW THE LOW LEVEL INVERSION HAS ALLOWED FOG TO FORM. WITH THE MOST ACCUMULATION IN THE HIGHER ELEVATIONS. A CLOSED OFF UPPER LOW WITH ENHANCED UPWARD VERTICAL VELOCITIES WILL ALLOW FOR HEAVIER SNOWFALL TO OCCUR.
335 AM MST FRI JAN 8 2016 BROAD UPPER LOW WAS TRACKING TO THE FOUR CORNERS THIS MORNING.
AND TIMING OF COLD FRONT WERE THE FOCUS TODAY. DECENT OMEGA WITHIN THE DENDRITIC LAYER LOOKS TO CONTINUE THROUGH THE MORNING HOURS OVER WESTERN TO NORTHERN IOWA BEHIND THE COLD FRONT AND LIGHT SNOW IS LIKELY TO PERSIST DURING MUCH OF THE MORNING.
Most precipitation will exit the area as the low pulls out, but a bit of light rain or drizzle could linger into the afternoon and evening. It wouldn't be surprising to see a little freezing drizzle mixing in overnight as a low-level front/convergence axis swings through while soundings show a lack of ice nucleation aloft. Didn't add freezing drizzle to the forecast just yet since confidence isn't terribly high, and any icing would be very light.
554 AM CST FRI JAN 8 2016 IFR CEILINGS WILL GRADUALLY SPREAD NORTH TO SOUTH TODAY WITH A COLD FRONT. THE FRONT WILL GRADUALLY MOVE THROUGH OKLAHOMA TODAY AND BRING COOLER AIR AND LOW CLOUDS WITH IT. AS THE COLDER AIR DEEPENS WITH THE PASSAGE OF THE UPPER LOW OVER WESTERN AND CENTRAL OKLAHOMA AFTER MIDNIGHT, A MIX OF RAIN SNOW OR LIGHT SNOW IS EXPECTED FROM SOUTHWEST INTO CENTRAL OKLAHOMA.
IFR CONDITIONS WILL LIKELY RETURN TONIGHT AS WINDS BECOME LIGHT AND VARIABLE AHEAD OF A COLD FRONT APPROACHING THE CWA ALLOWING FOG TO DEVELOP. WARMER TEMPERATURES ARE EXPECTED THIS AFTERNOON COMPARED TO YESTERDAY AS CLEAR SKIES AND SOUTH WINDS PROVIDE UNSEASONABLY WARM CONDITIONS. WILL LIKELY REDEVELOP TONIGHT AS WINDS BECOME LIGHT AND VARIABLE BEFORE A COLD FRONT MOVES THROUGH THE RIO GRANDE VALLEY LATE TONIGHT INTO SAT MORNING. COOLER AND DRIER AIR WILL FILTER INTO DEEP SOUTH TEXAS SATURDAY IN THE WAKE OF THE FRONT.
415 AM CST FRI JAN 8 2016 BROAD AND LARGELY UNFOCUSED TROUGH ACROSS THE AREA THIS MORNING. A SMALLER SCALE VORTEX SPINNING JUST SOUTHEAST OF THE KFSD AREA ALONG THE TROUGH AXIS LOCALLY ENHANCING PRECIPITATION. LIKELY NOT A GREAT DEAL FURTHER FOR MAIN SNOW BAND TO PIVOT WESTWARD AS TROUGH AXIS BEGINS TO SHIFT EASTWARD BY MID MORNING. AREAS WEST OF THE BETTER SNOW BAND HAVE BEEN REPORTING SOME PERIODS OF FREEZING DRIZZLE WITH LACK OF DEEPER SATURATION FAILING TO INTRODUCE ICE. WITH MUCH OF THE SNOW OCCURRING WITH TEMPS NEAR FREEZING.
544 AM CST FRI JAN 8 2016 BROAD AND LARGELY UNFOCUSED TROUGH ACROSS THE AREA THIS MORNING. A SMALLER SCALE VORTEX SPINNING JUST SOUTHEAST OF THE KFSD AREA ALONG THE TROUGH AXIS LOCALLY ENHANCING PRECIPITATION. LIKELY NOT A GREAT DEAL FURTHER FOR MAIN SNOW BAND TO PIVOT WESTWARD AS TROUGH AXIS BEGINS TO SHIFT EASTWARD BY MID MORNING. AREAS WEST OF THE BETTER SNOW BAND HAVE BEEN REPORTING SOME PERIODS OF FREEZING DRIZZLE WITH LACK OF DEEPER SATURATION FAILING TO INTRODUCE ICE. WITH MUCH OF THE SNOW OCCURRING WITH TEMPS NEAR FREEZING.
NOT QUITE AS COLD TONIGHT BUT STILL BELOW AVERAGE WITH A FEW COLDEST LOCATIONS APPROACHING FREEZING AGAIN SATURDAY MORNING.
200 AM EDT FRI APR 17 2015 HIGH PRESSURE MOVING OFF THE NEW ENGLAND COAST THIS AFTERNOON WILL GIVE WAY TO WEAK LOW PRESSURE MOVING ACROSS THE GREAT LAKES ON FRIDAY. AS HIGH PRESSURE BUILDS SOUTHWARD FROM QUEBEC.
LOOK FOR HIGH TEMPERATURES IN THE LOWER DESERTS TO BE A FEW DEGREES BELOW NORMAL ON FRIDAY.
SHORT WAVE RIDGING AND SLIGHTLY DRIER AND MORE STABLE AIR MOVES IN SAT AM WHICH WILL HELP SUPPRESS CONVECTION FOR MUCH OF THE MORNING AND INTO THE EARLY AFTERNOON. MOISTURE LEVELS WILL INCREASE DURING THE MID TO LATE AFTERNOON AS SEABREEZES DEVELOP AND MOVE INLAND AND WARM FRONT TO SOUTH BEGINS TO LIFT NORTH TOWARDS THE AREA.
HIGH PRESSURE WILL CONTROL NORTHERN AND CENTRAL NEVADA'S WEATHER FOR THE NEXT FEW DAYS WITH A WARMING TREND THROUGH THE WEEKEND.
MOST UNSTABLE AIR WILL BE AROUND THE EDGE OF THE COOLER AIR AND HAVE INCLUDED THUNDER FOR TONIGHT ALONG THE NORTHERN AND WESTERN ZONES.
345 AM CDT FRI APR 17 2015 AN UPPER LEVEL TROUGH OF LOW PRESSURE CURRENTLY OVER THE FOUR CORNERS REGION WILL SLOWLY CROSS THE CENTRAL PLAINS ON SATURDAY. A DRY AIR MASS OVER MOST OF THIS CWA TODAY WITH DEW POINTS LIKELY FALLING INTO THE LOWER 20S SHOULD KEEP PCPN CHANCES CONFINED TO THE I-90 CORRIDOR AT BEST.
A SQUASHED VERSION OF THE SUBTROPICAL RIDGE REMAINS INTACT ACROSS THE WESTERN CARIBBEAN. SUPPORTING A FRACTURED HIGH PRESSURE SYSTEM ACROSS THE WESTERN ATLANTIC AND EASTERN GULF OF MEXICO.