Alert archive / Pennsylvania / Special Weather Statements in 2012

Special Weather Statement, NWS Pittsburgh, PA

July 30, 2012Washington County, Pennsylvania

NWS Pittsburgh, PA issued this special weather statement at Jul 30, 2012, 8:56 PM EDT for Washington County, Pennsylvania. It was in force for 34 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: Jul 30, 2012, 8:56 PM EDT (00:56 UTC)
Expired: Jul 30, 2012, 9:30 PM EDT
In force: 34 min
Issued by: NWS Pittsburgh, PA

County Washington County, PA

The radar

The Pittsburgh radar (KPBZ), 52 km from the middle of the area, began a volume at 00:56 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

Pittsburgh, PA (KPIT), launched 00:00Z, 0.9 hours before the alert went out and 36 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: 88 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 1966 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 94 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 Jul 30, 7:38 PM EDT, 1 hour 18 minutes earlier.

Area forecast discussion, Jul 30, 7:38 PM EDT, 1 hour 18 minutes before

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Hazardous weather outlook, Jul 30, 3:57 AM EDT, 16 hours 59 minutes before

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In the hours before

Special weather statement, Jul 30, 7:25 PM EDT, 1 hour 31 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
725 PM EDT MON JUL 30 2012

WVZ021-022-310015-
MARION WV-MONONGALIA WV-
725 PM EDT MON JUL 30 2012

...A STRONG THUNDERSTORM WILL AFFECT SOUTH CENTRAL MONONGALIA AND
SOUTHEASTERN MARION COUNTIES...

AT 723 PM EDT...A STRONG THUNDERSTORM WAS LOCATED 5 MILES SOUTHWEST
OF BROWNS CHAPEL...MOVING NORTH AT 10 MPH.

THIS STORM MAY WILL PRODUCE PENNY SIZE HAIL. HEAVY RAIN WILL POND
WATER ON ROADS AND MAY QUICKLY FILL SMALL STREAMS.

SOME LOCATIONS THAT WILL BE IMPACTED INCLUDE...
    RURAL MARION COUNTY AT 740 PM

    RURAL MONONGALIA COUNTY AT 740 PM

THIS WILL IMPACT THE FOLLOWING HIGHWAY...

I-79 IN WEST VIRGINIA BETWEEN MILE MARKERS 140 AND 147.

PLEASE REPORT SIGNIFICANT WEATHER TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...877-633-6772.

LAT...LON 3951 8011 3958 7994 3945 7993 3942 8000

15

Special weather statement, Jul 30, 8:56 PM EDT, 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
Jul 30, 9:39 PM EDT	Special Weather Statement	PBZ	Allegheny	36 min
Jul 30, 9:55 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Westmoreland	20 min
Jul 31, 2:16 PM EDT	Special Weather Statement	PBZ	Jefferson	29 min
Jul 31, 2:30 PM EDT	Special Weather Statement	PBZ	Allegheny	30 min
Jul 31, 2:38 PM EDT	Special Weather Statement	PBZ	Indiana	52 min
Jul 31, 2:55 PM EDT	Special Weather Statement	PBZ	Fayette	35 min
Jul 31, 3:00 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette	45 min
Jul 31, 3:03 PM EDT	Special Weather Statement	PBZ	Indiana	42 min
Jul 31, 3:09 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Armstrong, Westmoreland	51 min
Jul 31, 4:09 PM EDT	Special Weather Statement	PBZ	Jefferson	21 min
Jul 31, 4:43 PM EDT	Special Weather Statement	PBZ	Westmoreland	32 min
Jul 31, 4:51 PM EDT	Special Weather Statement	PBZ	Fayette	54 min
Jul 31, 4:59 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Westmoreland	46 min
Jul 31, 5:52 PM EDT	Special Weather Statement	PBZ	Fayette	38 min
Jul 31, 1:32 PM EDT	Special Weather Statement	PBZ	Tucker	43 min
Jul 31, 1:41 PM EDT	Severe Thunderstorm Warning	PBZ	Preston, Tucker	34 min
Jul 31, 5:41 PM EDT	Areal Flood Advisory	PBZ	Preston, Tucker	3 hr
Jul 31, 12:10 PM EDT	Special Weather Statement	PBZ	Garrett	35 min
Jul 31, 12:56 PM EDT	Severe Thunderstorm Warning	PBZ	Garrett	34 min
Jul 31, 2:21 PM EDT	Special Weather Statement	PBZ	Garrett	39 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.