Alert archive / Pennsylvania / Flash Flood Watches in 2017
Flash Flood Watch 8, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this flash flood watch at Jul 27, 2017, 2:13 PM EDT for 10 counties in Pennsylvania; 9 counties in West Virginia. It took effect at Jul 28, 2017, 6:00 AM EDT. It was in force for 26 hr.
The area
The counties it named.
The facts
- Issued
- Jul 27, 2017, 2:13 PM EDT (18:13 UTC)
- In effect from
- Jul 28, 2017, 6:00 AM EDT
- Expired
- Jul 29, 2017, 7:44 AM EDT
- In force
- 26 hr
- Issued by
- NWS Pittsburgh, PA
- Flood severity
- None
Counties Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Butler County, PA, Clarion County, PA, Fayette County, PA, Greene County, PA, Jefferson County, PA, Washington County, PA, Westmoreland County, PA, Brooke County, WV, Hancock County, WV, Marion County, WV, Marshall County, WV, Monongalia County, WV, Ohio County, WV, Preston County, WV, Tucker County, WV, Wetzel County, WV
The radar
The Pittsburgh radar (KPBZ), 42 km from the middle of the area, began a volume at 18:16 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 (KAGC), launched 12:00Z, 6.2 hours before the alert went out and 26 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1466 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this flash flood watch 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 flash flood watch went out at Jul 27, 12:57 PM EDT, 1 hour 16 minutes earlier.
Area forecast discussion, Jul 27, 12:57 PM EDT, 1 hour 16 minutes before
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</html>Hazardous weather outlook, Jul 27, 12:48 PM EDT, 1 hour 25 minutes before
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</html>The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 6:01 PM EDT | Flash Flood Warning | PBZ | Fayette | 3 hr |
Nearby
Flash Flood Watches in Pennsylvania, 2017Flash Flood Watches in West Virginia, 2017Every flash flood watch in 2017
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.