Flight crew reported incurring a runway incursion at pit airport due to an unusual placement of hold...

Attributes
ACN	1613565
Time
Date	201901
Local Time Of Day	0001-0600
Place
Locale Reference	PIT.Airport
State Reference	PA
Environment
Flight Conditions	IMC
Light	Dawn
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Flight Plan	IFR
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 146 Flight Crew Type 2403
Person 2
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 157 Flight Crew Type 1165
Events
Anomaly	Deviation - Procedural Clearance Ground Incursion Runway

Narrative:

During taxi out during active snowfall; we inadvertently crossed a non-standard hold short line for 28C at pit on taxiway east parallel to the runway centerline.we had originally planned on departing 28R and visibility on ATIS was 9 miles with -sn (light snow); but then was changed to 28C and the visibility dropped to 1/2 mile with mist and sn (moderate snow) during our taxi out. We updated our takeoff landing distance and the captain updated his taxi out brief while we were at the de-ice pad. 'Expecting to get left turn taxiway north; left turn taxiway east to 28C; no hot spots.' after de-icing; we were cleared as expected by ground. Unfortunately; after we made the left turn on east; I was heads down finishing the before takeoff checklist (checking the weather radar I believe) and the captain inadvertently taxied slightly (est. 5-10 feet.) past the non-standard hold short line (parallel to the runway; not perpendicular) which was completely obscured with snow. At about the same time; tower cleared us for takeoff and I am sure was unable to see that we had slightly passed the hold short.

Original NASA ASRS Text

Title: Flight crew reported incurring a runway incursion at PIT airport due to an unusual placement of hold short line; coupled with low visibility and snow.

Narrative: During taxi out during active snowfall; we inadvertently crossed a non-standard hold short line for 28C at PIT on taxiway E parallel to the runway centerline.We had originally planned on departing 28R and visibility on ATIS was 9 miles with -SN (light snow); but then was changed to 28C and the visibility dropped to 1/2 mile with mist and SN (moderate snow) during our taxi out. We updated our Takeoff Landing distance and the Captain updated his taxi out brief while we were at the de-ice pad. 'Expecting to get left turn taxiway N; left turn taxiway E to 28C; no hot spots.' After de-icing; we were cleared as expected by Ground. Unfortunately; after we made the left turn on E; I was heads down finishing the before takeoff checklist (checking the weather radar I believe) and the Captain inadvertently taxied slightly (est. 5-10 feet.) past the non-standard hold short line (parallel to the runway; not perpendicular) which was completely obscured with snow. At about the same time; tower cleared us for takeoff and I am sure was unable to see that we had slightly passed the hold short.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Flight crew reported incurring a runway incursion at pit airport due to an unusual placement of hold short line; coupled with low visibility and snow.