Alert archive / Pennsylvania / Flood Watches in 2008
Flood Watch 5, NWS State College, PA
NWS State College, PA issued this flood watch at Apr 20, 2008, 9:25 AM EDT for 13 counties in Pennsylvania. It took effect at Apr 20, 2008, 2:00 PM EDT. It was in force for 14 hr.
The area
The counties it named.
The facts
- Issued
- Apr 20, 2008, 9:25 AM EDT (13:25 UTC)
- In effect from
- Apr 20, 2008, 2:00 PM EDT
- Expired
- Apr 21, 2008, 4:21 AM EDT
- In force
- 14 hr
- Issued by
- NWS State College, PA
- Flood severity
- None
Counties Adams County, PA, Bedford County, PA, Blair County, PA, Cambria County, PA, Cumberland County, PA, Franklin County, PA, Fulton County, PA, Huntingdon County, PA, Juniata County, PA, Mifflin County, PA, Perry County, PA, Somerset County, PA, York County, PA
The radar
The State College radar (KCCX), 81 km from the middle of the area, began a volume at 13:25 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, 1.4 hours before the alert went out and 145 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
- 497 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 530 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 112 m²/s²
- 0-3 km storm-relative helicity
- 154 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.4
What forecasters said that day
The local office's own words before this 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 flood watch went out at Apr 20, 7:39 AM EDT, 1 hour 46 minutes earlier.
Area forecast discussion, Apr 20, 7:39 AM EDT, 1 hour 46 minutes before
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</html>Hazardous weather outlook, Apr 20, 2:38 AM EDT, 6 hours 47 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE STATE COLLEGE PA 238 AM EDT SUN APR 20 2008 PAZ004>006-010>012-017>019-024>028-033>037-041-042-045-046-049>053- 056>059-063>066-210645- WARREN-MCKEAN-POTTER-ELK-CAMERON-NORTHERN CLINTON-CLEARFIELD- NORTHERN CENTRE-SOUTHERN CENTRE-CAMBRIA-BLAIR-HUNTINGDON-MIFFLIN- JUNIATA-SOMERSET-BEDFORD-FULTON-FRANKLIN-TIOGA-NORTHERN LYCOMING- SULLIVAN-SOUTHERN CLINTON-SOUTHERN LYCOMING-UNION-SNYDER-MONTOUR- NORTHUMBERLAND-COLUMBIA-PERRY-DAUPHIN-SCHUYLKILL-LEBANON-CUMBERLAND- ADAMS-YORK-LANCASTER- 238 AM EDT SUN APR 20 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA. .DAY ONE...TODAY AND TONIGHT THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. LOW PRESSURE WILL DRIFT SLOWLY SOUTHEAST ACROSS THE CENTRAL APPALACHIANS TODAY INTO MONDAY BRINGING LOCALLY HEAVY RAIN TO THE LAUREL HIGHLANDS AND PORTIONS OF SOUTH CENTRAL PENNSYLVANIA. 1 TO 2 INCHES OF RAIN WILL LIKELY FALL OVER THE REGION NEAR AND TO THE SOUTH OF THE PENNSYLVANIA TURNPIKE...AND TO THE WEST OF INTERSTATE 81. THIS AMOUNT OF RAIN WILL NOT CAUSE FLOODING...EVEN ON SMALLER STREAMS. HOWEVER...SOME COMPUTER MODEL INFORMATION INDICATES A LOW PROBABILITY FOR LOCALLY AROUND 3 INCHES OF RAIN NEAR THE PENNSYLVANIA...MARYLAND BORDER...WHICH WOULD APPROACH THE THRESHOLD NEEDED TO PRODUCE MINOR FLOODING ON SMALL STREAMS. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. DEVOIR
The office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 20, 6:32 PM EDT | Severe Thunderstorm Warning | CTP | Adams, York | 43 min |
| Apr 20, 6:44 PM EDT | Tornado Warning | CTP | York | 31 min |
Nearby
Flood Watches in Pennsylvania, 2008Every flood watch in 2008
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.