Alert archive / Pennsylvania / Flash Flood Watches in 2015
Flash Flood Watch 8, NWS State College, PA
NWS State College, PA issued this flash flood watch at Sep 10, 2015, 11:11 AM EDT for 8 counties in Pennsylvania. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Sep 10, 2015, 11:11 AM EDT (15:11 UTC)
- Expired
- Sep 10, 2015, 6:00 PM EDT
- In force
- 7 hr
- Issued by
- NWS State College, PA
- Flood severity
- None
Counties Adams County, PA, Cumberland County, PA, Dauphin County, PA, Franklin County, PA, Lancaster County, PA, Lebanon County, PA, Perry County, PA, York County, PA
The radar
The State College radar (KCCX), 124 km from the middle of the area, began a volume at 15:14 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
Washington/Dulle, VA (KIAD), launched 12:00Z, 3.2 hours before the alert went out and 137 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
- 58 J/kg
- Mixed-layer CIN
- -85 J/kg
- Mixed-layer LCL
- 843 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- 75 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 State College, PA wrote its last area forecast discussion before this flash flood watch went out at Sep 10, 8:17 AM EDT, 2 hours 54 minutes earlier.
Area forecast discussion, Sep 10, 8:17 AM EDT, 2 hours 54 minutes before
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</html>Hazardous weather outlook, Sep 10, 5:53 AM EDT, 5 hours 18 minutes before
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</html>The office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 9, 8:50 PM EDT | Special Weather Statement | CTP | Northumberland | 25 min |
| Sep 10, 10:50 AM EDT | Areal Flood Advisory | CTP | Adams, York | 3 hr |
| Sep 10, 11:31 AM EDT | Flash Flood Warning | CTP | York | 3 hr |
| Sep 10, 11:36 AM EDT | Flash Flood Warning | CTP | Adams, York | 3 hr |
| Sep 10, 12:02 PM EDT | Areal Flood Advisory | CTP | York | 3 hr |
| Sep 10, 1:25 PM EDT | Areal Flood Advisory | CTP | Cumberland, Dauphin, Lancaster, Lebanon | 3 hr |
Nearby
Flash Flood Watches in Pennsylvania, 2015Every flash flood watch in 2015
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.