Alert archive / Pennsylvania / Lake Effect Snow Advisories in 2016

Lake Effect Snow Advisory 3, NWS State College, PA

February 9, 2016McKean County, Pennsylvania

NWS State College, PA issued this lake effect snow advisory at Feb 9, 2016, 10:28 PM EST for McKean County, Pennsylvania. It took effect at Feb 10, 2016, 1:00 AM EST. It was in force for 45 hr.

The area

The counties it named.

The facts

Issued
Feb 9, 2016, 10:28 PM EST (03:28 UTC)
In effect from
Feb 10, 2016, 1:00 AM EST
Expired
Feb 11, 2016, 10:00 PM EST
In force
45 hr
Issued by
NWS State College, PA

County McKean County, PA

The radar

The State College radar (KCCX), 109 km from the middle of the area, began a volume at 03:26 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 3.5 hours before the alert went out and 125 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Buffalo Intl Airport, NY at 00:00Z on 2016-02-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Buffalo Intl Airport, NY at 00:00Z on 2016-02-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -20 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
631 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
-20 m²/s²
0-3 km storm-relative helicity
68 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this lake effect snow advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS State College, PA wrote its last area forecast discussion before this lake effect snow advisory went out at Feb 9, 9:09 PM EST, 1 hour 19 minutes earlier.

Area forecast discussion, Feb 9, 9:09 PM EST, 1 hour 19 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
909 PM EST TUE FEB 9 2016

.SYNOPSIS...

A DEEP UPPER TROUGH WILL ESTABLISH ITSELF OVER THE NORTHEASTERN
US OVER THE NEXT SEVERAL DAYS BRINGING THE COLDEST AIR OF THE
SEASON ALONG WITH A PROLONGED PERIOD OF SNOW SHOWERS TO WESTERN
AND NORTHERN HIGHER ELEVATIONS...ESPECIALLY IN THE SNOWBELT
LOCATIONS DOWNWIND OF LAKE ERIE.

&&

.NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/...

SNOW HAS CONTINUED TO SHRINK IN COVERAGE SO THE BULK OF THE
HEADLINES FROM THE LAURELS EASTWARD HAVE BEEN DROPPED. HEADLINES
HAVE BEEN CONTINUED FOR THE LAURELS WHERE AN EXTENDED PERIOD OF
UPSLOPE SNOW CAN BE EXPECTED AS COLDER AIR FILTERS INTO THE
REGION.

THE MAIN CHANGE FOR THE NEAR TERM WAS TO UPGRADE THE WATCH FOR
WARREN COUNTY TO A LAKE EFFECT SNOW WARNING...AND TO ERECT A LAKE
EFFECT SNOW ADVISORY FOR THE NEIGHBORING MCKEAN WITH INDICATIONS
POINTING TO A LONG PERIOD OF FAVORABLE OVER-LAKE FLOW. A LAKE
MICHIGAN CONNECTION IS MADE TO DEVELOP UNDER HIGHLY-FAVORABLE
TEMPERATURE/LAKE INDUCED INSTABILITY CONDITIONS WHICH SHOULD FAVOR
THE USUAL SNOW BELT AREAS WITH LOCALLY HEAVY SNOW SHOWERS AND
HEAVIER SNOW SQUALLS.

FARTHER DOWNSTREAM THE AIR WILL DRY OUT AS IT TYPICALLY DOES IN
THE DOWNSLOPE FLOW...SO MOST OTHER LOCATIONS WILL SEE LITTLE MORE
THAN FLURRIES.

LOW TEMPS WILL FALL INTO THE LOW TO MID 20S TONIGHT.

&&

.SHORT TERM /6 AM WEDNESDAY MORNING THROUGH WEDNESDAY NIGHT/...

ON WED...THE LAKE EFFECT IN THE NW SHOULD CONTINUE...ESPECIALLY
FAVORING NWRN WARREN COUNTRY AS THE WSW FLOW FAVORS MOST OF THE
BANDED SNOWS SLIDING INTO NY STATE.

TEMPS WILL DROP OFF QUITE QUICKLY LATE WED AS REGION RECEIVES A
GLANCING BLOW OF -20C 850MB AIR. MINS MAY GET INTO THE SINGLE
DIGITS ON THE HILL TOPS OF THE ALLEGHENIES AND LAURELS AS WIND
CHILLS GO BELOW ZERO IN A STIFF BREEZE.

&&

.LONG TERM /THURSDAY THROUGH TUESDAY/...
*IMPACT WEATHER HIGHLIGHTS: SNOW SQUALLS POSSIBLE WITH ARCTIC
 FRONT FRIDAY NIGHT-EARLY SATURDAY; FRIGID TEMPERATURES/DANGEROUS
 WIND CHILLS FOR VALENTINES WEEKEND.

POLAR VORTEX DIVES FROM HUDSON BAY SOUTHEAST ACROSS QUEBEC AND
NORTHERN NEW ENGLAND THURSDAY-SUNDAY. THE GLOBAL MODELS AND
ENSEMBLE MEANS KEEP A 'MILDER' TROUGH PATTERN IN PLACE OVER THE
NORTHEAST CONUS INTO NEXT WEEK.

THE FIRST SHOT OF COLD AIR ARRIVES ON THURSDAY WITH LAKE EFFECT
AND UPSLOPE SNOW SHOWERS TAPERING OFF THURSDAY NIGHT. LIGHT TO
MODERATE SNOW ACCUMULATIONS ARE LIKELY IN THE FAVORED NORTHWEST
SNOWBELT AND HIGHER TERRAIN ALONG THE ALLEGHENIES/LAUREL
HIGHLANDS.

THE COLDEST AIRMASS OF THE 2015-16 WINTER SEASON REMAINS POISED
TO ARRIVE THIS WEEKEND...AS A BLAST OF ARCTIC AIR DELIVERS A SHORT
DURATION COLD OUTBREAK TO CENTRAL PENNSYLVANIA. SNOW SQUALLS ARE
POSSIBLE WITH THE ARCTIC FRONTAL PASSAGE FRIDAY NIGHT INTO EARLY
SATURDAY.

MAX/MIN TEMPERATURE DEPARTURES OF -20 TO -25 DEGREES BELOW CLIMO
ARE FCST SATURDAY AND SUNDAY. MINIMUM TEMPERATURES SATURDAY NIGHT
INTO EARLY SUNDAY MORNING RANGE FROM AROUND 0F IN THE LOWER SUSQ.
VALLEY TO -10F IN THE NORTHWEST ALLEGHENIES. THE FRIGID TEMPERATURES
COMBINED WITH DANGEROUS WIND CHILLS /-10 TO -25 BELOW ZERO/ WILL
RESULT IN AN INCREASED RISK FOR FROSTBITE AND HYPOTHERMIA.

A SLOW MODERATION (WARMING TREND) IS EXPECTED INTO EARLY NEXT
WEEK...BUT WITH A POTENTIAL OVERRUNNING/WAA TYPE SNOW EVENT.

&&

.AVIATION /02Z WEDNESDAY THROUGH SUNDAY/...
IFR/LIFR CONDITIONS WILL REMAIN WIDESPREAD...ESPECIALLY ALONG AND
SOUTHEAST OF I 80. THE DRIER FLOW IS MOVING IN FROM THE
NORTHEAST...WHICH WILL SIGNAL AN END TO MOST OF THE SNOW
SHOWERS...OUTSIDE OF THE LAKE AND TOPOGRAPHIC EFFECTED REGIONS. SNOW
WILL CONTINUE TO TAPER TO FLURRIES AS THE EVENING
CONTINUES...CIGS WILL REMAIN LOW THROUGH THE EVENING...BUT AS
WESTERLY FLOW INCREASES A BIT OVERNIGHT CIGS WILL IMPROVE AS WELL
IN CENTRAL AND EASTERN AREAS. LOWER SUSQ WILL IMPROVE TO VFR WITH
CENTRAL MTNS HOLDING ON TO AN MVFR DECK. WESTERN HIGHER TERRAIN
WILL CONTINUE TO SEE SOME SNOWFLAKES IN THE AIR WITH UPSLOPE FLOW
KEEPING MAINLY IFR CIGS IN PLACE. EXPECT CIGS TO IMPROVE TOWARD
MORNING.

OUTLOOK...

WED...MAINLY IFR IN SNOW WRN AIRSPACE. MVFR-VFR CIGS
CENTRAL/EAST.
THU-SAT...MVFR IN -SHSN W MTNS. VFR ELSEWHERE.
SUN...NO SIG WX.

&&

.CTP WATCHES/WARNINGS/ADVISORIES...
LAKE EFFECT SNOW ADVISORY FROM 1 AM WEDNESDAY TO 1 PM EST
THURSDAY FOR PAZ005.
LAKE EFFECT SNOW WARNING FROM 1 AM WEDNESDAY TO 1 PM EST
THURSDAY FOR PAZ004.
WINTER WEATHER ADVISORY UNTIL 7 PM EST WEDNESDAY FOR PAZ024-
033.

&&

SYNOPSIS...LA CORTE
NEAR TERM...LA CORTE
SHORT TERM...RXR
LONG TERM...STEINBUGL
AVIATION...CERU/RXR
Hazardous weather outlook, Feb 9, 9:01 PM EST, 1 hour 27 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE STATE COLLEGE PA
901 PM EST TUE FEB 9 2016

PAZ024-033-110215-
CAMBRIA-SOMERSET-
901 PM EST TUE FEB 9 2016

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 7 PM EST WEDNESDAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO
WEATHER.GOV/STATECOLLEGE ON THE INTERNET FOR MORE
INFORMATION ABOUT THE FOLLOWING HAZARDS.

   WINTER WEATHER ADVISORY.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO
WEATHER.GOV/STATECOLLEGE ON THE INTERNET FOR MORE
INFORMATION ABOUT THE FOLLOWING HAZARDS.

   WINTER WEATHER ADVISORY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

PAZ004-110215-
WARREN-
901 PM EST TUE FEB 9 2016

...LAKE EFFECT SNOW WARNING IN EFFECT FROM 1 AM WEDNESDAY TO 1 PM
EST THURSDAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO
WEATHER.GOV/STATECOLLEGE ON THE INTERNET FOR MORE
INFORMATION ABOUT THE FOLLOWING HAZARDS.

   LAKE EFFECT SNOW WARNING.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO
WEATHER.GOV/STATECOLLEGE ON THE INTERNET FOR MORE
INFORMATION ABOUT THE FOLLOWING HAZARDS.

   LAKE EFFECT SNOW WARNING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

PAZ005-110215-
MCKEAN-
901 PM EST TUE FEB 9 2016

...LAKE EFFECT SNOW ADVISORY IN EFFECT FROM 1 AM WEDNESDAY TO 1 PM
EST THURSDAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO
WEATHER.GOV/STATECOLLEGE ON THE INTERNET FOR MORE
INFORMATION ABOUT THE FOLLOWING HAZARDS.

   LAKE EFFECT SNOW ADVISORY.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO
WEATHER.GOV/STATECOLLEGE ON THE INTERNET FOR MORE
INFORMATION ABOUT THE FOLLOWING HAZARDS.

   LAKE EFFECT SNOW ADVISORY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

PAZ006-010>012-017>019-025>028-034>037-041-042-045-046-049>053-
056>059-063>066-110215-
POTTER-ELK-CAMERON-NORTHERN CLINTON-CLEARFIELD-NORTHERN CENTRE-
SOUTHERN CENTRE-BLAIR-HUNTINGDON-MIFFLIN-JUNIATA-BEDFORD-FULTON-
FRANKLIN-TIOGA-NORTHERN LYCOMING-SULLIVAN-SOUTHERN CLINTON-
SOUTHERN LYCOMING-UNION-SNYDER-MONTOUR-NORTHUMBERLAND-COLUMBIA-PERRY-
DAUPHIN-SCHUYLKILL-LEBANON-CUMBERLAND-ADAMS-YORK-LANCASTER-
901 PM EST TUE FEB 9 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...TONIGHT.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Local storm report, Feb 9, 9:12 PM EST, 1 hour 16 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
912 PM EST TUE FEB 09 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0912 PM     SNOW             GIRARDVILLE             40.79N  76.28W
02/09/2016  M6.5 INCH        SCHUYLKILL         PA   SOCIAL MEDIA

&&

EVENT NUMBER CTP1601198

EVANEGO
Local storm report, Feb 9, 9:37 PM EST, 51 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
937 PM EST TUE FEB 09 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0937 PM     SNOW             GREENCASTLE             39.79N  77.73W
02/09/2016  M4.8 INCH        FRANKLIN           PA   TRAINED SPOTTER

&&

EVENT NUMBER CTP1601199

EVANEGO
Local storm report, Feb 9, 9:41 PM EST, 47 minutes before
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Local storm report, Feb 9, 9:46 PM EST, 42 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
946 PM EST TUE FEB 09 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0946 PM     SNOW             HARRISBURG INTERNATIONA 40.19N  76.76W
02/09/2016  M5.5 INCH        DAUPHIN            PA   ASOS

            WEATHER OBSERVER

&&

EVENT NUMBER CTP1601201

EVANEGO
Local storm report, Feb 9, 10:05 PM EST, 23 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1005 PM EST TUE FEB 09 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1005 PM     SNOW             BLOOMSBURG              41.00N  76.46W
02/09/2016  M2.5 INCH        COLUMBIA           PA   SOCIAL MEDIA

&&

EVENT NUMBER CTP1601202

EVANEGO
Local storm report, Feb 9, 10:13 PM EST, 15 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1013 PM EST TUE FEB 09 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1012 PM     SNOW             COLONIAL PARK           40.30N  76.81W
02/09/2016  M6.0 INCH        DAUPHIN            PA   SOCIAL MEDIA

&&

EVENT NUMBER CTP1601203

EVANEGO

The office that day

Everything else NWS State College, PA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 9, 7:53 PM ESTSpecial Weather StatementCTPUnion52 min
Feb 9, 10:28 PM ESTLake Effect Snow WarningCTPWarren48 hr
Feb 10, 3:13 PM ESTSpecial Weather StatementCTPMcKean, Warren107 min
Feb 10, 5:08 PM ESTSpecial Weather StatementCTPCameron, Elk, Potter52 min
Feb 10, 6:04 PM ESTSpecial Weather StatementCTPCameron, Potter, Tioga56 min

Nearby

Lake Effect Snow Advisories in Pennsylvania, 2016Every lake effect snow advisory in 2016

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.