Aikyam-Lab/Synoptic-Bench huggingface dataset:
THE RAIN WILL HAVE A TOUGH TIME PUSHING EAST DURING THE DAY SATURDAY SO THE HIGHEST POPS WILL REMAIN ACROSS THE NORTHWEST PART OF THE FORECAST AREA. RAIN WILL BECOME WIDESPREAD AREA WIDE AS THE UPPER LOW TO OUR WEST OPENS UP AND MOVES EAST TOWARDS THE AREA. TEMPERATURES THROUGHOUT THIS TIME PERIOD WILL REMAIN WELL ABOVE FREEZING.
IT LOOKS LIKE THERE WILL BE ENOUGH MOISTURE AND LIFT IN THE DENDRITIC GROWTH ZONE TO KEEP THE PRECIP SNOW OR SLEET AND NOT FREEZING RAIN. RAIN AND SNOW MAY MAKE A RETURN TO MUCH OF THE PANHANDLES AS ANOTHER COLD FRONT MOVES THROUGH THE REGION.
AS HIGH PRESSURE AT THE SURFACE SETTLES IN OVER THE REGION. /ISSUED 353 AM CST FRI JAN 30 2015/ HIGH PRESSURE CENTERED ALONG THE UPPER MISSISSIPPI VALLEY WAS DOMINATING THE WEATHER ACROSS THE REGION THIS MORNING.
CHATTANOOGA AIRPORT, TN 43 25 50 34 / 10 0 10 10 KNOXVILLE MCGHEE TYSON AIRPORT, TN 39 21 46 29 / 10 0 0 10 OAK RIDGE, TN 38 22 45 31 / 10 0 10 10 TRI CITIES AIRPORT, TN 34 17 43 25 / 50 0 10 10.
DRY WEATHER WILL CONTINUE THROUGH SATURDAY AS HIGH PRESSURE REMAINS OVER THE REGION.
AND I STILL EXPECT THE LOWER CLOUDS TO GRADUALLY DISSIPATE BY LATE MORNING OR EARLY AFTERNOON. CHATTANOOGA AIRPORT, TN 43 25 50 34 / 10 0 10 10 KNOXVILLE MCGHEE TYSON AIRPORT, TN 39 21 46 29 / 10 0 0 10 OAK RIDGE, TN 38 22 45 31 / 10 0 10 10 TRI CITIES AIRPORT, TN 34 17 43 25 / 30 0 10 10 TN.
415 AM PST FRI JAN 30 2015 A LOW PRESSURE SYSTEM CENTERED OVER SOUTHERN CALIFORNIA WILL BRING A CHANCE OF SHOWERS TO THE MOUNTAINS AND DESERT THROUGH TONIGHT. DRY WEATHER AND ABOVE NORMAL AFTERNOON TEMPERATURES WILL PREVAIL THIS WEEKEND AS A RIDGE OF HIGH PRESSURE BUILDS INTO CENTRAL CALIFORNIA. A WEAK UPPER LOW SPINNING NEAR NORTHERN BAJA IS DRAWING SOME MOISTURE NORTHWARD AND PRODUCING A LITTLE BIT OF LIGHT PRECIPITATION IN THE KERN COUNTY DESERT AND MOUNTAIN AREAS. MODEL RUNS HANDLE THE EVOLUTION OF THE UPPER LOW SIMILARLY.
634 AM EST FRI JAN 30 2015 INITIALLY WEAK LOW PRESSURE WILL TRACK EASTWARD FROM THE GREAT LAKES AND REACH THE NEW ENGLAND COAST TODAY. THIS LOW WILL THEN INTENSIFY RAPIDLY AS IT MOVES NORTHEAST TO THE CANADIAN MARITIMES. HIGH PRESSURE FOLLOWS OVER THE WEEKEND.
A DEVELOPING UPPER LOW OVER THE SOUTHERN GREAT BASIN WILL SPREAD MOISTURE INTO UTAH THROUGH SATURDAY.
1041 AM EST FRI JAN 30 2015 CURRENTLY - A LARGE AREA OF HIGH PRESSURE IS DESCENDING SOUTHEASTWARD INTO THE SOUTHEASTERN UNITED STATES. AND IN THE PROCESS OF WASHING OUT THE WEAK TAIL END OF A TROUGH STRETCHING ACROSS FLORIDA. INTO THE OUTER STRAITS OF THE LOWER KEYS. AND THE PREVIOUSLY MENTIONED WEAK TROUGH DISSIPATES ACROSS SOUTH FLORIDA. GENTLE NORTH TO NORTHEAST BREEZES WILL GRADUALLY BACK THROUGH THE AFTERNOON HOURS AS A WEAK TROUGH WASHES OUT OVER SOUTH FLORIDA.
AREAS OF FOG WILL INCREASE IN COVERAGE AS THE LOW LEVELS SATURATE. WILL MOVE TO NORTHEAST WYOMING SENDING THE NEXT ARCTIC COLD FRONT SOUTH ACROSS OUR NORTHERN COUNTIES.
853 AM EST FRI JAN 30 2015 INITIALLY WEAK LOW PRESSURE WILL TRACK EASTWARD FROM THE GREAT LAKES AND REACH THE NEW ENGLAND COAST TODAY. THIS LOW WILL THEN INTENSIFY RAPIDLY AS IT MOVES NORTHEAST TO THE CANADIAN MARITIMES. HIGH PRESSURE FOLLOWS OVER THE WEEKEND.
RAIN CHANCES WILL RESUME SATURDAY WITH GRADUALLY INCREASING MOISTURE LEVELS AND A MESSY SW FLOW ALOFT (IN ASSOCIATION W/ WESTERN TROF).
A LOW PRESSURE SYSTEM WILL MOVE ACROSS SOUTHERN CALIFORNIA TODAY.
TEMPERATURES WILL BEGIN A GRADUAL REBOUND INTO THE LOWER 60S BUT DROPPED HIGH TEMPS ACROSS THE PLAINS A FEW DEGREES DUE TO THE SLOW START. THE SW WINDS WILL INCREASE ACROSS THE MOUNTAINS AND SOUTHERN PLAINS THROUGH THE DAY WITH HELP FROM AN APPROACHING UPPER TROUGH UPSTREAM AND A JET OVERHEAD. THE MODELS ARE ALL PRETTY CONSISTENT REGARDING THE TROUGH CROSSING THE CWA WEDNESDAY NIGHT. MODEST QG ASCENT IS EXPECTED THROUGH AROUND 06Z WITH STRONG SUBSIDENCE OVERSPREADING THE AREA BEHIND THE TROUGH THEREAFTER.
345 PM CDT Tue Apr 7 2015 (Today and Tonight) Currently, west Texas is under southwest flow aloft with a strong upper level low moving across California, and zonal flow across most of the eastern U. There are a few Cu trying to get going over the higher terrain to our west, but these have been struggling. While there is an outside chance for isolated thunderstorms this evening from this higher terrain to move into our area, not confident than any of these potential storms making it farther east than Crockett County tonight.
THE MID TO UPPER LEVEL LOW MOVING INTO NORTHERN CALIFORNIA THIS AFTERNOON WILL MOVE ACROSS THE CENTRAL ROCKIES WEDNESDAY. A WEAK SHORT WAVE TROUGH WILL MOVE OUT OF NORTHEAST MEXICO INTO SOUTH TEXAS WEDNESDAY NIGHT. CONVECTION EXPECTED TO DEVELOP OVER THE HIGHER TERRAIN IN NORTHEAST MEXICO LATE WEDNESDAY AFTERNOON/EARLY EVENING.
A COLD DRY AIR MASS OVER SOUTHERN CANADA AND FEEDING INTO THE GREAT LAKES REGION ON BLUSTERY NORTHEAST WINDS WILL STUBBORNLY LINGER WHILE A WARMER AND MORE MOIST AIR MASS EXTENDED INTO MISSOURI TO SOUTHERN ILLINOIS SOUTH OF A SURFACE WARM FRONT. WITH THE 850 WARM FRONT POSITIONED NORTH OF THE SURFACE FRONT. BUT ANTICIPATE AN INCREASE IN COVERAGE FROM WEST TO EAST LATER THIS AFTERNOON AND ESPECIALLY TONIGHT AS THE SHORT WAVE TROUGH APPROACHES FROM THE WEST.
THE CURRENT VISIBLE SATELLITE IMAGE IS SHOWING A WELL DEFINED COLD FRONT EXITING THE FORECAST AREA THIS MORNING. THE SATELLITE WATER VAPOUR IMAGE IS SHOWING THE PARENT LOW OF THE PREVIOUSLY MENTIONED COLD FRONT MAKING ITS WAY TOWARDS THE SAN FRANCISCO AND MONTEREY BAY AREA COAST. SNOW LEVELS WILL LOWER AS THE CENTER OF THE LOW PASSES OVER THE AREA. AREA IS IN AN UNSTABLE AIR MASS BEHIND A POTENT COLD FRONT TODAY WHICH IS LEADING TO ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS ACROSS THE AREA. SFO BRIDGE APPROACH. A COLD FRONT MOVED OVER THE COASTAL WATERS EARLY THIS MORNING.
325 PM CDT TUE APR 7 2015 ANOTHER WARM AND HUMID DAY ACROSS THE FORECAST AREA AS HIGH PRESSURE AROUND FLORIDA AND LOW PRESSURE IN KANSAS KEEPS A SOUTHERLY FLOW OFF THE GULF INTACT. UPPER LEVEL LOW ACROSS NORTHERN CALIFORNIA IS STILL EXPECTED TO OPEN UP AND MOVE EASTWARD ACROSS THE ROCKIES AND THE NORTHERN PLAINS.
346 PM CDT TUE APR 7 2015 SOUTHWEST FLOW ALOFT AHEAD OF A POTENT UPPER LEVEL LOW PRESSURE SYSTEM NOW MOVING ONTO THE WEST COAST. BUT THE LOW IS PULLING SOME OF THE MOISTURE INTO EASTERN NEBRASKA AND WRAPPING IT BACK WEST INTO OUR OUR REGION. SO EXPECT THE LOW CLOUDS. THE WEST COAST UPPER LEVEL LOW WILL BE APPROACHING FROM THE WEST BY LATE WEDNESDAY AFTERNOON. THE BETTER CHANCES FOR RAIN HOWEVER SHOULD HOLD OFF UNTIL WEDNESDAY NIGHT WHEN THE UPPER LOW TRACKS OVER OR VERY NEAR THE AREA.
106 PM EDT TUE APR 7 2015 CLOUDS WILL GIVE WAY TO INCREASING SUNSHINE THIS AFTERNOON AS HIGH PRESSURE BUILDS IN FROM THE NORTH.
MAX TEMPS IN THE LOW/MID 80S LOOKS ON TRACK. CLOUD COVER THIS MORNING IS LESS THAN YESTERDAY SO MAY GET A LITTLE WARMER.
425 PM CDT TUE APR 7 2015 A FAIRLY QUIET DAY ACROSS THE FORECAST AREA AS HIGH PRESSURE OFF TO THE EAST PULLS IN DEEPER GULF MOISTURE TODAY.
IMPROVING FLIGHT CATEGORIES ARE EXPECTED THIS AFTERNOON AS WE WARM UP AND THE LOWER LEVELS MIX OUT A BIT.
332 PM CDT TUE APR 7 2015 WARM MOIST AIR HAS SETTLED OVER MIDDLE TN THANKS TO STRONG SOUTHWEST FLOW NOT ONLY IN THE LOW LEVELS BUT AT THE SURFACE AS WELL. THIS PATTERN WILL LARGELY REMAIN UNCHANGED OVER THE NEXT FEW DAYS ALLOWING FOR THE MOISTURE TO STICK AROUND AS WELL AS WARMER TEMPERATURES.
A COLD FRONT WAS SLOWLY PUSHING SOUTH ACROSS CENTRAL AND SOUTHWEST KANSAS EARLY THIS MORNING. MOS GUIDANCE IS PRETTY SIMILAR OVER WESTERN SECTIONS OF THE CWA BUT DIFFERS MORE IN THE EAST WHERE THE COOLER MET MOS KEEPS HIGHS IN THE UPPER 60S WHILE THE MAV GUIDANCE WARMS CENTRAL KANSAS INTO THE MID 70S. GIVEN THAT THERE WILL BE STRATUS ERODING THROUGH PART OF THE DAY, HAVE CONTINUED TO LEAN TOWARD THE COOLER GUIDANCE FOR THAT AREA.
141 PM EDT TUE APR 7 2015 HIGH PRESSURE WILL BUILD ACROSS THE REGION THIS AFTERNOON THROUGH WEDNESDAY.
UPPER LOW AND TROUGH CURRENTLY MOVING ONTO THE NORTHERN CALIFORNIA COAST WILL MOVE INLAND TONIGHT AND BE SITUATED OVER THE GREAT BASIN AREA BY WEDNESDAY MORNING BRINGING A DIFFLUENT FLOW ALOFT TO OUR FORECAST AREA.
WE ARE IN A SOUTH TO WEST-SOUTHWEST FLOW FROM WEST TO EAST ACROSS THE AREA AROUND RIDGE. SOUTHERLY FLOW WILL CONTINUE WITH SFC RIDGING CENTERED OVER THE ATLANTIC. ISOLATED TO POSSIBLY SCATTERED CONVECTION IS POSSIBLE IN THE EAST ON THE PERIPHERY OF THE RIDGE.
LOW PRESSURE MOVING SLOWLY EASTWARD ACROSS THE GREAT BASIN WILL BRING COOLER TEMPERATURES AND LOCALLY GUSTY WINDS TO THE REGION THROUGH THE MIDDLE OF THE WEEK. A SLOW WARMING TREND IS FORECAST FROM THE END OF THIS WEEK INTO EARLY NEXT AS HIGH PRESSURE RIDGING GRADUALLY REBUILDS OVER THE DESERT SOUTHWEST. SATELLITE IMAGERY THIS AFTERNOON SHOWS THE UPPER LEVEL LOW MOVING ACROSS NORTHERN CALIFORNIA. A PLUME OF HIGH CLOUDS STREAKS ACROSS ARIZONA DUE TO THE 100KT 300-250MB JET AHEAD OF THE TROUGH CURRENTLY MOVING OVER THE STATE. SURFACE ANALYSIS NOW SAGS THE COLD FRONT ASSOCIATED WITH THE UPPER LOW TO JUST NORTH OF AN LOS ANGELES- BARSTOW LINE.
SUBTLE MID LEVEL WAVE COUPLED WITH I305K ASCENT (750-700MB THETA DERIVED) RESULTING IN CONVECTION ACROSS THE AREA EARLY THIS MORNING AS A WARM FRONT APPROACHES FROM THE SW. OTHERWISE TEMPS AND HUMIDITY UP TODAY WITH THE WARM FRONT NORTH OF THE AREA BY THIS EVENING.
THIS MORNINGS COLD FRONT HAS PUSHED WELL EAST OF THE FORECAST AREA AND COLD AIR IS NOW FILLING IN BEHIND IT. BOTH MODELS QUICKLY BUILD IN A RIDGE OF HIGH PRESSURE BRINGING AN END TO PRECIPITATION IN OUR AREA THROUGH AT LEAST THIS WEEKEND. AREA IS IN AN UNSTABLE AIR MASS BEHIND A POTENT COLD FRONT TODAY WHICH IS LEADING TO ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS ACROSS THE AREA. SFO BRIDGE APPROACH. A COLD FRONT MOVED OVER THE COASTAL WATERS EARLY THIS MORNING.
VERY WARM CONDITIONS WILL PREVAIL AS AN UPPER RIDGE BUILDS OVER THE REGION.
THE 1 PM EDT REGIONAL SURFACE ANALYSIS SHOWED THE WESTERN PERIPHERY OF AN ATLANTIC RIDGE ACROSS MUCH OF THE SOUTHEAST, GIVING OUR FORECAST AREA LIGHT ONSHORE WINDS. VAPOR IMAGERY AND UPPER AIR DATA SHOWED A BROAD RIDGE OVER THE SOUTHEAST, THOUGH THERE WERE A FEW WEAK IMPULSES PROPAGATING EASTWARD THROUGH THE RIDGE.
ANY ACCUMS TOMORROW WILL GENERALLY BE LIGHT AND CONFINED TO THE HIGHER PEAKS ALONG THE DVD. ROSE AN UPR TROF WL BE MOVING ACRS THE AREA WED NIGHT. THE UPR TROF WL EXIT THE AREA THU MORNING. WITH BREEZY NORTH WINDS ACRS THE ERN PLAINS BEHIND THE TROF. TEMPS ON THU WL BE COOLER IN THE WAKE OF THE TROF. ON FRI WESTERLY FLOW ALOFT WL BE OVR THE FORECAST AREA WITH AN UPR TROF MOVING THRU THE NRN ROCKIES OF MTN AND WY.
446 PM EDT TUE APR 7 2015 HIGH PRESSURE WILL BUILD ACROSS THE REGION TONIGHT THROUGH WEDNESDAY.
123 PM EDT TUE APR 7 2015 ATLANTIC HIGH PRESSURE WILL MAINTAIN SUFFICIENT ATMOSPHERIC MOISTURE OVER OUR REGION THROUGH MUCH OF THIS WEEK.
HIGHS WILL GENERALLY BE IN THE LOW TO MID 80S WEDNESDAY.
AN UPPER LEVEL RIDGE IS ANCHORED IN THE GULF PROVIDING SOUTHWESTERLY FLOW OVER ARKLATEX. WHERE A SHORT WAVE WAS MOVING AROUND THE NORTHERN PERIPHERY OF THE RIDGE.
The frontal boundary should start to slowly push back northward across central IL later this evening and overnight as 1007 mb low pressure over northeast KS tracks into central IL by Wed morning. Scattered showers and thunderstorms will develop during tonight along this boundary over central IL as low pressure approaches and frontal boundary starts to lift back north with ample moisture. Lows tonight mostly in the upper 50s and lower 60s, except cooler low to mid 50s from Galesburg to Peoria and Bloomington northward which stays north of the boundary much of the night.
249 PM CDT TUE APR 7 2015 CURRENT WATER VAPOR IMAGERY SHOWS A FAIRLY STRONG UPPER LEVEL LOW JUST OFF OF THE NW COAST. WEAK UPPER LEVEL RIDGING CONTINUES TO BUILD IN ACROSS THE SOUTHEAST. THE AXIS OF THE UPPER LEVEL RIDGE WILL CONTINUE TO SLIDE EASTWARD OVERNIGHT.
217 PM MDT TUE APR 7 2015 TUESDAY THROUGH WEDNESDAY NEAR SEASONAL TEMPERATURES WILL REMAIN OVER THE AREA FOR THE NEAR TERM AS A WEAK UPPER LEVEL RIDGE REMAINS IN THE AREA. WITH A CLOSED LOW MOVING ACROSS THE GREAT BASIN.
138 PM EDT TUE APR 7 2015 HIGH PRESSURE CONTINUES TO KEEP THE WEATHER QUIET ACROSS SOUTH FLORIDA.
DRY AND WARMER WEATHER RETURNS FOR THE LATTER PART OF THE WEEK. THE UPPER LOW ASSOCIATED WITH TODAY/S WEATHER IS OVER EXTREME NORTHERN CALIFORNIA AND SLOWLY SHIFTING TOWARD NORTHWEST NEVADA. WILL ALLOW THE WINTER STORM ADVISORIES TO REMAIN IN EFFECT THROUGH THIS EVENING TO ACCOUNT FOR SNOW TOTALS OF 4 TO 6 INCHES NEAR THE 5000 FOOT LEVELS AND HIGHER AMOUNTS FOR THE HIGHER TERRAIN. WITH THE COLD FRONT MOVING THROUGH CALIFORNIA THIS AFTERNOON. COOLER AIR FILTERED INTO THE CENTRAL CALIFORNIA INTERIOR AS AFTERNOON READING HAVE BEEN DOWN BY 5 TO 10 DEG-F FROM VALUES SEEN OVER THE WEEKEND. MODELS PROG THE ATMOSPHERE TO STABILIZE AS THE UPPER LEVEL TROF EXITS THE REGION. THE NEXT STORM MAY NOT OVERCOME THE RIDGE PATTERN AND BE FORCED TO DROP TOWARD BAJA CALIFORNIA.
WARMER SOUTH WITH SOME CLEARING AND COOLER NORTH WHERE CLOUDS AND SHOWERS PERSISTED. A COMPLEX OF STORMS IN THE LOWER OHIO VALLEY NOW IS EXPECTED TO MOVE EAST AND JUST STAY NORTH OF THE FORECAST AREA. ON WEDNESDAY OVERALL PATTERN WITH UPPER LEVEL RIDGING OVER THE SOUTHEAST AND MOIST WEST TO SOUTHWEST FLOW CONTINUES. TEMPERATURES SHOULD BE MUCH WARMER IN THE MID 70S TO LOWER 80S WITH SOME SUNSHINE.
THIS MORNINGS COLD FRONT HAS PUSHED WELL EAST OF THE FORECAST AREA AND COLD AIR IS NOW FILLING IN BEHIND IT. BOTH MODELS QUICKLY BUILD IN A RIDGE OF HIGH PRESSURE BRINGING AN END TO PRECIPITATION IN OUR AREA THROUGH AT LEAST THIS WEEKEND. AREA IS IN AN UNSTABLE AIR MASS BEHIND A POTENT COLD FRONT TODAY WHICH IS LEADING TO ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS ACROSS THE AREA. SFO BRIDGE APPROACH.
A ROBUST AND EXPANSIVE HIGH PRESSURE SYSTEM COVERS THE NORTHWEST ATLANTIC BASIN. ITS RIDGE AXIS EXTENDS WEST ACROSS NORTHERN FLORIDA AND REACHES WELL INTO NORTHERN MEXICO. DRY AIR AND SUBSIDENCE WILL REMAIN ENTRENCHED IN THE LOWER- MID LEVELS.
255 PM EDT TUE APR 7 2015 HIGH PRESSURE WILL CONTINUE OFFSHORE THROUGH MIDWEEK.
758 PM EDT THU MAR 19 2015 HIGH PRESSURE OVER LAKE THE EASTERN LAKES WILL MOVE OFF THE NEW ENGLAND COAST OVERNIGHT. ALLOWING A LOW PRESSURE SYSTEM TO MOVE ACROSS THE UPPER OHIO VALLEY FRIDAY.
WILL KEEP THE 06-12Z ALIGNMENT PRETTY MUCH AS IS WITH THE HIGHER POPS REMAINING ACROSS SE OK/WC AR ZONES.
LOW CIGS UNDER NNE FLOW WILL DEVELOP NEAR SSI WITH MVFR TO IFR CIGS EXPECTED TONIGHT THEN AS COASTAL TROUGH DEVELOPS OFFSHORE TONIGHT NLY FLOW WILL FOCUS LOW CIGS FARTHER SOUTH TOWARD JAX.
1156 PM EDT THU MAR 19 2015 AVIATION A WEAKENING AREA OF LOW PRESSURE WILL TRACK UP THE OHIO VALLEY TONIGHT. A RIDGE OF HIGH PRESSURE ARRIVES FOR FRIDAY AND SUPPORTS MODERATING TEMPERATURES. A COLD FRONT PUSHES IN FROM THE NORTHWEST FRIDAY NIGHT POSSIBLY LEADING TO A FEW SHOWERS.
WHILE DECENT IN THE LOWER LEVELS. THE NISH VALLEY WILL LIKELY SEE THE COLDEST READINGS AND ARE EXPECTED TO DIP BELOW FREEZING. SOUTHWEST OF THE LOW A TROUGH EXTENDS OVER SOUTH DAKOTA TO NEBRASKA AND COLORADO.
1010 PM EDT THU MAR 19 2015 A BROAD AREA OF LOW PRESSURE WILL MOVE THROUGH KENTUCKY TONIGHT.
SKIES HAVE ALREADY CLEARED OVER MUCH OF THE PLAINS AND THIS CLEARING SHOULD SPREAD TO THE HIGH COUNTRY BY AROUND MIDNIGHT. UPPER TROUGH EXITING TO THE EAST THIS EVENING WITH SOME LINGERING CONVECTIVE SHOWERS EXPECTED EARLY. A DRIER NORTHERLY FLOW ALOFT AS A RIDGE OF HIGH PRESSURE BUILDS IN FROM THE WEST. AIRMASS DRY AND STABLE FRIDAY WITH HIGH PRESSURE AT THE SURFACE AND ALOFT. WARMER TEMPERATURES WITH RELATIVE HUMIDITIES DROPPING INTO THE MID TO UPPER TEENS IN THE AFTN.
Removed the likely PoPs for the metro area overnight and kept the highest PoPs. in the high chance category. A cdfnt will drop into the region late Sat, bringing cooler temps for Sun. Ahead of the fnt, have trended aoa the warmer guidance, which is slightly warmer than the prev forecast. AVIATION: (For the 06z TAFs through 06z Friday Night) IFR CIGs will expand to the rest of STL metro by 08z, with improvement from west to east late tonight and into Friday morning as the low clouds slowly clear out.
CHATTANOOGA AIRPORT, TN 49 64 45 69 / 50 40 10 10 KNOXVILLE MCGHEE TYSON AIRPORT, TN 46 60 43 66 / 70 60 10 0 OAK RIDGE, TN 46 60 42 66 / 70 60 10 0 TRI CITIES AIRPORT, TN 43 56 41 61 / 90 70 10 0.
1253 AM EDT FRI MAR 20 2015 LOW PRESSURE WILL TRACK TO OUR SOUTH AND SHOULD JUST GRAZE THE AREA WITH POSSIBLY SOUTHERN NEW HAMPSHIRE PICKING UP A DUSTING TO A HALF INCH OF SNOW ON FRIDAY.
822 PM EDT THU MAR 19 2015 LOW PRESSURE WILL BRING A CHANCE FOR LIGHT RAIN PERHAPS MIXED WITH LIGHT SNOW LATE TO THE AREA TONIGHT. HIGHS ON FRIDAY WILL CLIMB INTO THE LOWER TO MIDDLE 50S. WEAK UPPER LEVEL SUPPORT WITH THIS NEXT SYSTEM COMBINED WITH DRY AIR IN THE LOW LEVELS SHOULD ALLOW LIMITED PRECIPITATION TO SPREAD NORTH ACROSS THE FORECAST AREA. WITH THE CHANCE FOR LIGHT FREEZING RAIN WHERE SURFACE TEMPERATURES FALL BELOW FREEZING. LOWERED WATER EQUIVALENT PRECIPITATION BY ABOUT ONE HALF GIVEN CHALLENGES SATURATING THE LOWEST LAYERS.
AN ELONGATED UPPER RIDGE WILL RESIDE OVER THE NORTHERN YUCATAN AND CUBA OVERNIGHT WITH FLAT RIDGING ALOFT MUCH OF THE GULF REGION. AT THE SURFACE - HIGH PRESSURE WITH A RELAXED PRESSURE GRADIENT SPRAWLED ACROSS FL AND OVER THE GULF. BRIDGING A DIFFUSE FRONTAL BOUNDARY THAT STRETCHED DOWN THE STATE. THE WATERS SHOULD REMAIN UNDER THE INFLUENCE OF HIGH PRESSURE THE NEXT FEW DAYS.
717 PM EDT THU MAR 19 2015 HIGH PRESSURE OVER LAKE THE EASTERN LAKES WILL MOVE OFF THE NEW ENGLAND COAST OVERNIGHT. ALLOWING A LOW PRESSURE SYSTEM TO MOVE ACROSS THE UPPER OHIO VALLEY FRIDAY.
THE GENTLE VEERING WITH HEIGHT PLACES A DEEP RIDGE COMPLEX ACROSS THE WESTERN CARIBBEAN AND THE SOUTHERN GULF OF MEXICO.
853 PM PDT Thu Mar 19 2015 Cooler Friday and this weekend as a weak system clips the north state with a chance of precis well north of Sacramento Friday night.
A VERY WEAK UPPER LEVEL SHORT WAVE TROUGH MOVING THROUGH THE RIDGE WILL BE ACCOMPANIED BY SOME HIGH CLOUDS TONIGHT. SOUTHWEST FLOW ALOFT WILL PROVIDE WARMER TEMPERATURES ON FRIDAY WITH RECORD OR NEAR RECORD TEMPS EXPECTED IN A FEW LOCATIONS.
Removed the likely PoPs for the metro area overnight and kept the highest PoPs. in the high chance category. A cdfnt will drop into the region late Sat, bringing cooler temps for Sun. Ahead of the fnt, have trended aoa the warmer guidance, which is slightly warmer than the prev forecast. Questionable whether there will be drizzle overnight with the lower CIGs as a weak TROF moves thru, and will monitor the next few hours on whether to put that in. A light westerly flow will develop on Friday in the wake of this TROF. Questionable on whether a drizzle will persist overnight with a weak TROF moving thru and for now left out.
643 PM CDT Thu Mar 19 2015 /00Z TAFS/ A cold front will move through West Central Texas overnight, with postfrontal stratus and also shower and thunderstorm development. A cold front is currently located across North Texas and is forecast to move into the Big Country late this evening, then to the Interstate 10 corridor Friday morning. The next opportunity for rainfall will be along and behind the aforementioned cold front. Post frontal showers and isolated thunderstorms are forecast to develop behind the cold front during the day Friday. Highs on Friday will generally be in the low to mid 60s.
/ISSUED 317 PM CDT THU MAR 19 2015/ WARM FRONT LIFTING NORTHWARD THROUGH NORTH TEXAS THIS AFTERNOON. GIVEN CURRENT POSITION OF THE WARM FRONT.
A COLD FRONT MOVING THROUGH FRIDAY EVENING WILL KEEP CONVECTIVE CHANCES HIGH GOING INTO FRIDAY EVENING. HEAVY RAINFALL IS EXPECTED TO BEGIN DEVELOPING FRI AFT/EVE ACROSS EXTREME WESTERN AREAS AND WILL SHIFT SLOWLY E/SE FRI NIGHT AND EARLY SAT WITH A WEAK COLD FRONT.
726 PM EDT THU MAR 19 2015 HIGH PRESSURE OVER PENNSYLVANIA TODAY WILL PROVIDE FAIR AND DRY WEATHER. LOW PRESSURE WILL TRACK ACROSS THE MID ATLANTIC STATES AND BRING A LATE SEASON SNOWFALL TO THE AREA ON FRIDAY.
A COLD FRONT WILL PUSH SEWD ACROSS THE REGION FRIDAY MORNING.
918 PM EDT THU MAR 19 2015 HIGH PRESSURE OVER LAKE THE EASTERN LAKES WILL MOVE OFF THE NEW ENGLAND COAST OVERNIGHT. ALLOWING A LOW PRESSURE SYSTEM TO MOVE ACROSS THE UPPER OHIO VALLEY FRIDAY.
856 PM EDT THU MAR 19 2015 LOW PRESSURE WILL TRACK TO OUR SOUTH AND SHOULD JUST GRAZE THE AREA WITH POSSIBLY SOUTHERN NEW HAMPSHIRE PICKING UP A DUSTING TO A HALF INCH OF SNOW ON FRIDAY.
EASTERLY FLOW MOVING AROUND A HIGH LOCATED ACROSS THE MID-ATLANTIC IS BRINGING IN COOLER AIR ACROSS EASTERN PORTIONS OF THE STATE AND LOWERED TEMPERATURES TONIGHT ACROSS THE EAST. MODELS CONTINUE WITH THE LOW CIGS AND DROPPED THEM DOWN FOR THIS SET. VIS MAY BE MORE LIMITED AT THE NORTHERN SITES DUE TO THE LOW CLOUDS.
607 PM CDT THU MAR 19 2015 WV IMAGERY THIS AFTN SHOWING AN ELONGATED POS TILT TROF EXTENDING FROM THE UPPER MIDWEST DOWN TO BAJA.
1044 PM EDT THU MAR 19 2015 LOW PRESSURE CROSSING THE OHIO VALLEY WILL BRING INCREASING PRECIPITATION CHANCES TONIGHT THROUGH EARLY FRIDAY. SOUTHEAST FLOW AND COLD AIR DAMMING SHOULD HELP KEEP TEMPERATURES JUST BELOW FREEZING IN PARTS OF GARRETT COUNTY MD ONCE THE TEMPERATURES ARE REALIZED LATER TONIGHT AND RESULT IN A PERIOD OF FREEZING RAIN. THE WINTER WEATHER ADVISORY FOR GARRETT COUNTY WAS LEFT UNCHANGED TO ACCOUNT FOR THE FREEZING RAIN. POTENTIAL SNOW ACCUMULATION IN THE HIGHER ELEVATIONS. LOW LEVEL MOISTURE SHOULD KEEP CLOUDS ACROSS THE REGION INTO FRIDAY NIGHT BEFORE WEAK RIDGING BUILDS IN OVERNIGHT.
628 PM CDT THU MAR 19 2015 LATEST SFC ANALYSIS WAS INDICATING A LOW CENTER AND TRAILING TROF ACRS THE RED RVR VALLEY DOWN INTO SOUTH CENTRAL NEB. WHILE A RIDGE LOBE EXTENDED FROM THE WESTERN GRT LKS TOWARD KS CITY. UPPER TROF AND VORT MAX WERE SEEN ON WATER VAPOR ROLLING EAST-SOUTHEASTWARD ACRS CENTRAL MN ATTM. A LATER NIGHT CLEAR OUT IN CLOUDS FROM WEST-TO-EAST AMY ALLOW TEMPS TO DIP DOWN INTO THE LOW TO MID 30S FOR OVERNIGHT LOWS. SFC DPTS MIXING DOWN INTO THE LOW TO MID 30S AND SOUTHWEST WINDS OF 10-15 MPH MAY MAKE FOR A HIGHER GRASS FIRE THREAT BY MID AFTERNOON.
WEAK HIGH PRESSURE WILL BUILD OVER SOUTHWEST CALIFORNIA TODAY AND FRIDAY. COOLER AND BREEZY CONDITIONS ARE EXPECTED AS A COUPLE OF LOW PRESSURE SYSTEMS MOVE BY TO THE NORTH. THE UPPER LOW THAT BROUGHT ACTIVE WEATHER TO THE AREA YESTERDAY HAS MOVED SOUTHEAST. OTHERWISE, RIDGING WILL DEVELOP OVER THE AREA FRIDAY FOR WARMER AND MORE STABLE CONDITIONS. THE RIDGE WILL WEAKEN OVER THE WEEKEND AS A LITTLE TROF MOVES INTO THE PAC NW. THIS IN COMBINATION WITH AN INCREASING ONSHORE FLOW WILL BRING COOLER WEATHER ALONG WITH AN EXPANDING MARINE LYR COVERAGE.
AS WINDS SHIFT TO THE NORTHWEST AND CLOUDS CLEAR MIXING WILL INCREASE AND SHOULD SEE THE HIGH TEMPERATURES FOR THE DAY THIS EVENING. THE LOW STRATUS FIELD ACROSS WESTERN AND CENTRAL NORTH DAKOTA WILL CONTINUE TO ERODE FROM WEST TO EAST THROUGH THE REMAINDER OF THE AFTERNOON AND EARLY EVENING GIVEN THE LATEST VISIBLE SATELLITE TRENDS AND 16-18 UTC HRRR ITERATIONS. HIGHS IN THE LOWER 60S ARE POSSIBLE. NEAR THE WARMER EDGE OF THE 12 UTC SUITE.
A cdfnt will drop into the region late Sat, bringing cooler temps for Sun. Ahead of the fnt, have trended aoa the warmer guidance, which is slightly warmer than the prev forecast. Questionable whether there will be drizzle overnight with the lower CIGs as a weak TROF moves thru, and will monitor the next few hours on whether to put that in. A light westerly flow will develop on Friday in the wake of this TROF. Questionable on whether a drizzle will persist overnight with a weak TROF moving thru and for now left out.
1137 PM CDT THU MAR 19 2015 LATEST SFC ANALYSIS WAS INDICATING A LOW CENTER AND TRAILING TROF ACRS THE RED RVR VALLEY DOWN INTO SOUTH CENTRAL NEB. WHILE A RIDGE LOBE EXTENDED FROM THE WESTERN GRT LKS TOWARD KS CITY. UPPER TROF AND VORT MAX WERE SEEN ON WATER VAPOR ROLLING EAST-SOUTHEASTWARD ACRS CENTRAL MN ATTM. A LATER NIGHT CLEAR OUT IN CLOUDS FROM WEST-TO-EAST AMY ALLOW TEMPS TO DIP DOWN INTO THE LOW TO MID 30S FOR OVERNIGHT LOWS. SFC DPTS MIXING DOWN INTO THE LOW TO MID 30S AND SOUTHWEST WINDS OF 10-15 MPH MAY MAKE FOR A HIGHER GRASS FIRE THREAT BY MID AFTERNOON.