Alert archive / Pennsylvania / Special Weather Statements in 2012

Special Weather Statement, NWS Pittsburgh, PA

January 23, 20126 counties in Pennsylvania

NWS Pittsburgh, PA issued this special weather statement at Jan 23, 2012, 5:13 PM EST for 6 counties in Pennsylvania. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jan 23, 2012, 5:13 PM EST (22:13 UTC)
Expired: Jan 23, 2012, 6:00 PM EST
In force: 47 min
Issued by: NWS Pittsburgh, PA

Counties Armstrong County, PA, Clarion County, PA, Forest County, PA, Indiana County, PA, Jefferson County, PA, Westmoreland County, PA

The radar

The Pittsburgh radar (KPBZ), 85 km from the middle of the area, began a volume at 22:15 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 12:00Z, 10.2 hours before the alert went out and 246 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 627 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 252 m²/s²
0-3 km storm-relative helicity: 214 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

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

NWS Pittsburgh, PA wrote its last area forecast discussion before this special weather statement went out at Jan 23, 3:39 PM EST, 1 hour 34 minutes earlier.

Area forecast discussion, Jan 23, 3:39 PM EST, 1 hour 34 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PITTSBURGH PA
339 PM EST MON JAN 23 2012

.SYNOPSIS...
AS A COLD FRONT MOVES THROUGH THE REGION TONIGHT...EXPECT ONE LAST
ROUND OF SHOWERS ALONG WITH GUSTY WINDS. CONDITIONS SHOULD THEN BE
GENERALLY DRY UNTIL WEDNESDAY NIGHT.

&&

.NEAR TERM /THROUGH TUESDAY/...
COLD FRONT WILL MOVE EAST DURING THE EVENING HOURS...WHICH AS OF MID
AFTERNOON IS ACROSS EASTERN OHIO. MANY LOCATIONS ARE EXPERIENCING
GUSTS UP TO 40-45 MPH IN SHOWERS AS THE COLD FRONT MOVES THROUGH.
CONSIDERING WIND GUSTS ARE ONLY IN CONVECTIVE SHOWERS...STRONG
WINDS WILL BE HANDLED BY SEVERE THUNDERSTORM WARNINGS AS
NECESSARY. ONCE THE FRONT PASSES...TEMPERATURES WILL FALL QUICKLY
TONIGHT...EVEN THOUGH CLOUD COVER WILL REMAIN ACROSS THE AREA.
WILL CONTINUE TO GO SLIGHTLY BELOW MODEL GUIDANCE FOR
TEMPERATURES...ALTHOUGH MANY LOCATIONS HAVE SEEN A RAPID DECREASE
IN SNOW COVER TODAY.

HIGH PRESSURE WILL BEGIN TO MOVE IN FROM THE SOUTHWEST ON
TUESDAY...WHICH WILL KEEP WINDS OUT OF THE WEST-SOUTHWEST. HAVE GONE
WITH A SLOW DECREASING TREND FOR CLOUDS DURING THE DAY...SINCE
MODELS SEEM TO BE CLEARING CONDITIONS OUT TOO QUICKLY. HIGHS WILL BE
BETWEEN 10-20 DEGREES COLDER TOMORROW...ALTHOUGH THOSE VALUES WILL
BE NEAR CLIMATOLOGY.

&&

.SHORT TERM /TUESDAY NIGHT THROUGH THURSDAY/...
HIGH PRESSURE WILL BE OVERHEAD TUESDAY NIGHT...BRINGING CALM AND
CLEAR CONDITIONS. CLOUDS WILL BE ON THE INCREASE WEDNESDAY AS LOW
PRESSURE DEVELOPS OVER THE GULF COAST. 12Z GFS IS THE FAST OUTLIER
WITH BRINGING IN PRECIPITATION BY WEDNESDAY AFTERNOON...AND WILL
STICK WITH MORE CONSENSUS...SLOWER SOLUTIONS. MODELS ARE IN GOOD
AGREEMENT THAT MODEL PROFILES WILL BE NEAR FREEZING MOST OF
WEDNESDAY NIGHT...BUT THERE IS THE POTENTIAL FOR SOME FREEZING
PRECIPITATION OVERNIGHT. HOWEVER...NOT ENOUGH CONFIDENCE TO GO WITH
ANYTHING OTHER THAN RAIN/SNOW IN THE FORECAST FOR NOW. PRECIPITATION
WILL SPREAD FROM SOUTH TO NORTH ON THURSDAY...AND WILL GENERALLY GO
WITH HIGH CHANCE POPS DURING THE DAY.

&&

.LONG TERM /THURSDAY NIGHT THROUGH MONDAY/...
CONCURRING WITH HPC GUIDANCE, MADE FORECAST WITH MORE PREFERENCE TO
ECMWF MODEL OUTPUT. HENCE EXPECT MIXED PRECIPITATION THURSDAY NIGHT
TO BECOME SHOWERY FRIDAY AS TEXAS-BRED LOW PRESSURE SYSTEM PHASES
WITH PLAINS-BRED COLD FRONT IN THEIR EASTWARD PASSAGE THROUGH
THROUGH THE UPPER OHIO VALLEY THURSDAY NIGHT.

WITH THE UPPER-LEVEL JETSTREAM, DEVELOPING A COLD TROUGH OVER
CENTRAL CANADA THIS WEEKEND, THE NORTHERN JETSTREAM BRANCH WILL
PROMOTE ADDITIONAL PLAINS-BRED COLD FRONTS TO MOVE EASTWARD
THROUGH THE UPPER OHIO VALLEY SATURDAY AND MONDAY.

REGARDING TEMPERATURE DETAILS, PER RECENT HPC GUIDANCE AND NAEFS
MODEL OUTPUT, FORECASTED A COOL DOWN IN TEMPERATURES IN THE WAKE OF
THURSDAY NIGHT'S SYSTEMS, WITH VALUES PERHAPS AS COLD AS 5 TO 10
DEGREES COLDER THAN NORMAL IN THE WAKE OF SATURDAY'S COLD FRONTAL
PASSAGE. HENCE WHATEVER PRECIPITATION COMES SUNDAY INTO EARLY
MONDAY, IT WILL BE SHOWERS OF SNOW RATHER THAN RAIN.

&&

.AVIATION /21Z MONDAY THROUGH SATURDAY/...
RECENT SURFACE AND SATELLITE DATA SHOW STRATOCUMULUS HAS LIFTED TO
MVFR LEVELS ACROSS THE I-80 CORRIDOR, WHILE PREFRONTAL SCATTERED TO
BROKEN VFR STRATOCUMULUS HAVE SHIFTED EASTWARD FROM EASTERN OHIO
INTO WESTERN PENNSYLVANIA AND NORTHERN WEST VIRGINIA. DESPITE THE
SURFACE LAYER REMAINING RATHER STABLE, SURFACE WIND GUSTS CAN REACH
25-30 KTS.

RECENT RADAR AND SURFACE DATA, COUPLED WITH HRRR MODEL OUTPUT, SHOW
A NARROW COLD FRONTAL BAND OF MVFR SHOWERS WILL CONTINUE TO MOVE
EASTWARD THROUGH THE UPPER OHIO VALLEY THROUGH 00Z. SURFACE WIND
GUSTS CAN REACH 35-40 KTS. CONVECTION WILL BE TOO SHALLOW FOR CLOUD
TOPS TO REACH TEMPERATURES OF -20C. SO NO THUNDER FORECASTED.

ENSUING POSTFRONTAL COOL DOWN, BEST DEPICTED BY NAM MODEL
PROFILES, WILL PROMOTE A WELL-MIXED SURFACE LAYER TONIGHT, WHICH
WILL MAINTAIN MVFR STRATOCUMULUS AND SURFACE WIND GUSTS TO 25-30
KTS. A DEVELOPING CAPPING TEMPERATURE INVERSION NEAR 5 KFT AGL
SHOULD RESTRICT INSTABILITY SHOWER DEVELOPMENT. BY DAYTIME TUESDAY,
SURFACE WINDS SHOULD EASE TO 15-20 KTS AND STRATOCUMULUS CEILINGS
COULD LIFT TO VFR LEVELS BY AFTERNOON.

OUTLOOK...TUESDAY NIGHT THROUGH SATURDAY...
VFR TUESDAY NIGHT AND WEDNESDAY. MIXED PRECIPITATION AND RESTRICTIONS
POSSIBLE THURSDAY AND FRIDAY, AS LOW PRESSURE MOVES NORTHEAST FROM
TEXAS. AN ADDITIONAL PERIOD OF RESTRICTIONS IS POSSIBLE WITH A COLD
FRONTAL BAND OF SHOWERS SATURDAY.

&&

.PBZ WATCHES/WARNINGS/ADVISORIES...
MD...NONE.
OH...NONE.
PA...NONE.
WV...NONE.

&&

Hazardous weather outlook, Jan 23, 10:12 AM EST, 7 hours 1 minute before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PITTSBURGH PA
1012 AM EST MON JAN 23 2012

MDZ001-OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>023-
029-031-073>076-WVZ001>004-012-021>023-041-241200-
GARRETT-TUSCARAWAS-CARROLL-COLUMBIANA-COSHOCTON-HARRISON-
JEFFERSON OH-MUSKINGUM-GUERNSEY-BELMONT-NOBLE-MONROE-MERCER-VENANGO-
FOREST-LAWRENCE-BUTLER-CLARION-JEFFERSON PA-BEAVER-ALLEGHENY-
ARMSTRONG-INDIANA-WASHINGTON-GREENE-WESTMORELAND-WESTMORELAND RIDGES-
FAYETTE-FAYETTE RIDGES-HANCOCK-BROOKE-OHIO-MARSHALL-WETZEL-MARION-
MONONGALIA-PRESTON-TUCKER-
1012 AM EST MON JAN 23 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MARYLAND...EAST
CENTRAL OHIO...NORTHWEST PENNSYLVANIA...SOUTHWEST
PENNSYLVANIA...WEST CENTRAL PENNSYLVANIA...NORTHERN WEST VIRGINIA
AND NORTHERN PANHANDLE OF WEST VIRGINIA.

.DAY ONE...TODAY AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

In the hours before

Special weather statement, Jan 23, 2:56 PM EST, 2 hours 17 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
256 PM EST MON JAN 23 2012

OHZ039>041-232030-
CARROLL OH-COLUMBIANA OH-TUSCARAWAS OH-
256 PM EST MON JAN 23 2012

...SHOWERS WITH STRONG WIND GUSTS WILL AFFECT NORTHWESTERN CARROLL...
NORTHWESTERN COLUMBIANA AND TUSCARAWAS COUNTIES...

AT 251 PM EST...SHOWERS WITH STRONG WIND GUSTS WERE ALONG A LINE FROM
5 MILES NORTHEAST OF BOLIVAR TO STONE CREEK...MOVING NORTHEAST AT 45
MPH.

WIND GUSTS TO 50 MPH AND PEA-SIZED HAIL ARE POSSIBLE WITH THESE
SHOWERS.

SOME LOCATIONS THAT WILL BE IMPACTED INCLUDE...
  STONE CREEK...        DOVER...              NEW PHILADELPHIA...
  MINERAL CITY...       MALVERN...            DELLROY...
  HOMEWORTH...          EAST ROCHESTER...     AUGUSTA...

PLEASE REPORT SIGNIFICANT WEATHER TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...877-633-6772...WHEN YOU CAN DO SO SAFELY.

LAT...LON 4066 8142 4065 8125 4073 8123 4074 8109
      4090 8109 4091 8091 4093 8090 4094 8088
      4061 8107 4030 8162 4032 8162

Special weather statement, Jan 23, 3:12 PM EST, 2 hours 1 minute before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
312 PM EST MON JAN 23 2012

OHZ049-050-059-232045-
BELMONT OH-HARRISON OH-JEFFERSON OH-
312 PM EST MON JAN 23 2012

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL JEFFERSON...HARRISON AND
NORTHWESTERN BELMONT COUNTIES...

AT 308 PM EST...A STRONG THUNDERSTORM WAS LOCATED PIEDMONT...MOVING
NORTHEAST AT 50 MPH.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THIS STORM.

SOME LOCATIONS THAT WILL BE IMPACTED INCLUDE...
  PIEDMONT...           FLUSHING...           CLENDENING...
  NEW ATHENS...         CADIZ...              ADENA...
  JEWETT...             NEWELL...             HOPEDALE...
  SMITHFIELD...         UNIONPORT...          RICHMOND...

PLEASE REPORT SIGNIFICANT WEATHER TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...877-633-6772...WHEN YOU CAN DO SO SAFELY.

LAT...LON 4043 8096 4043 8094 4044 8094 4055 8074
      4031 8062 4008 8116 4024 8129

WOODRUM

Special weather statement, Jan 23, 3:27 PM EST, 1 hour 46 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
327 PM EST MON JAN 23 2012

OHZ040-041-232100-
CARROLL OH-COLUMBIANA OH-
327 PM EST MON JAN 23 2012

...SHOWERS WITH STRONG WIND GUSTS WILL AFFECT COLUMBIANA AND
NORTHERN CARROLL COUNTIES...

AT 322 PM EST...SHOWERS WITH STRONG WIND GUSTS WERE LOCATED 3 MILES
WEST OF EAST ROCHESTER...MOVING NORTHEAST AT 45 MPH.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THESE SHOWERS.

SOME LOCATIONS THAT WILL BE IMPACTED INCLUDE...
  MECHANICSTOWN...      MALVERN...            AUGUSTA...
  EAST ROCHESTER...     HOMEWORTH...          MILLPORT...
  GUILFORD LAKE STATE PARK...                 LISBON...
  SALEM...              BEAVER CREEK STATE PARK...
  LEETONIA...           COLUMBIANA...

PLEASE REPORT SIGNIFICANT WEATHER TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...877-633-6772...WHEN YOU CAN DO SO SAFELY.

LAT...LON 4094 8083 4091 8081 4090 8054 4070 8055
      4055 8122 4065 8127 4066 8125 4073 8123
      4074 8109 4090 8109 4091 8108 4091 8091
      4094 8090

WOODRUM

Special weather statement, Jan 23, 3:43 PM EST, 1 hour 30 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
343 PM EST MON JAN 23 2012

OHZ049-050-059-PAZ020-029-WVZ001>004-232115-
BEAVER PA-BELMONT OH-BROOKE WV-HANCOCK WV-HARRISON OH-JEFFERSON OH-
MARSHALL WV-OHIO WV-WASHINGTON PA-
343 PM EST MON JAN 23 2012

...SHOWERS WITH STRONG WIND GUSTS WILL AFFECT BROOKE...EASTERN
BELMONT...HANCOCK...JEFFERSON...NORTHERN MARSHALL...OHIO...
SOUTHEASTERN HARRISON...SOUTHERN BEAVER AND WESTERN WASHINGTON
COUNTIES...

AT 339 PM EST...SHOWERS WITH STRONG WIND GUSTS WERE ALONG A LINE FROM
2 MILES SOUTHEAST OF HAMMONDSVILLE TO ALLEDONIA...MOVING NORTHEAST AT
50 MPH.

WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THESE SHOWERS.

SOME LOCATIONS THAT WILL BE IMPACTED INCLUDE...
  UNIONPORT...          SMITHFIELD...         SAINT CLAIRSVILLE...
  RICHMOND...           NEWELL...
  BARKCAMP STATE PARK...                      ALLEDONIA...
  ADENA...              WINTERSVILLE...       DILLONVALE...
  TOMLINSON RUN STATE PARK...                 NEW CUMBERLAND...

PLEASE REPORT SIGNIFICANT WEATHER TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...877-633-6772...WHEN YOU CAN DO SO SAFELY.

LAT...LON 4052 8079 4074 8016 4061 8015 4048 8036
      4046 8034 4000 8034 3995 8048 3996 8052
      3991 8053 3986 8115

WOODRUM

Special weather statement, Jan 23, 4:12 PM EST, 1 hour 1 minute before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
412 PM EST MON JAN 23 2012

PAZ014-020-021-029-232145-
ALLEGHENY PA-BEAVER PA-BUTLER PA-WASHINGTON PA-
412 PM EST MON JAN 23 2012

...SHOWERS WITH STRONG WIND GUSTS WILL AFFECT ALLEGHENY...NORTHERN
WASHINGTON...SOUTHERN BEAVER AND SOUTHERN BUTLER COUNTIES...

AT 410 PM EST...SHOWERS WITH STRONG WIND GUSTS WERE ALONG A LINE FROM
3 MILES WEST OF ALIQUIPPA TO 5 MILES NORTHEAST OF VALLEY GROVE...
MOVING NORTHEAST AT 60 MPH.

WIND GUSTS TO 40 MPH AND PEA-SIZED HAIL ARE POSSIBLE WITH THESE
SHOWERS.

SOME LOCATIONS THAT WILL BE IMPACTED INCLUDE...
  SHIPPINGPORT...       RACCOON CREEK STATE PARK...
  HARSHAVILLE...        FLORENCE...           BURGETTSTOWN...
  AVELLA...             BEAVER...             CLAYSVILLE...
  ALIQUIPPA...          ECONOMY BORO...       MOON...
  IMPERIAL...

PLEASE REPORT SIGNIFICANT WEATHER TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...877-633-6772...WHEN YOU CAN DO SO SAFELY.

LAT...LON 4097 7970 4024 7983 4009 8052 4067 8050

WOODRUM

Special weather statement, Jan 23, 5:13 PM EST, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 22, 7:37 PM EST	Freezing Rain Advisory	PBZ	Clarion, Fayette, Forest, Jefferson, Venango, Westmoreland	14 hr
Jan 23, 4:12 PM EST	Special Weather Statement	PBZ	Allegheny, Beaver, Washington	33 min
Jan 23, 2:50 PM EST	Special Weather Statement	PBZ	Guernsey, Harrison	25 min
Jan 23, 2:56 PM EST	Special Weather Statement	PBZ	Tuscarawas	34 min
Jan 23, 3:12 PM EST	Special Weather Statement	PBZ	Harrison, Jefferson	33 min
Jan 23, 3:17 PM EST	Severe Thunderstorm Warning	PBZ	Harrison, Jefferson	28 min
Jan 23, 3:27 PM EST	Special Weather Statement	PBZ	Carroll, Columbiana	33 min
Jan 23, 3:43 PM EST	Special Weather Statement	PBZ	Belmont, Jefferson	32 min

Nearby

Special Weather Statements in Pennsylvania, 2012 Every special weather statement in 2012

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.