Alert archive / Pennsylvania / Areal Flood Warnings in 2011
Areal Flood Warning 8, NWS State College, PA
NWS State College, PA issued this areal flood warning at Mar 11, 2011, 4:52 AM EST for 12 counties in Pennsylvania. It was in force for 8 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Mar 11, 2011, 4:52 AM EST (09:52 UTC)
- Expired
- Mar 11, 2011, 12:45 PM EST
- In force
- 8 hr
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Clinton County, PA, Columbia County, PA, Dauphin County, PA, Lancaster County, PA, Lebanon County, PA, Lycoming County, PA, Montour County, PA, Northumberland County, PA, Potter County, PA, Schuylkill County, PA, Sullivan County, PA, Tioga County, PA
The radar
The State College radar (KCCX), 100 km from the middle of the area, began a volume at 09:55 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 00:00Z, 9.9 hours before the alert went out and 233 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
- 123 J/kg
- Mixed-layer CIN
- -28 J/kg
- Mixed-layer LCL
- 457 m above ground
- 0-6 km bulk shear
- 70 kt
- 0-1 km storm-relative helicity
- 256 m²/s²
- 0-3 km storm-relative helicity
- 309 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
What forecasters said that day
The local office's own words before this areal flood warning 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 areal flood warning went out at Mar 11, 4:45 AM EST, 7 minutes earlier.
Area forecast discussion, Mar 11, 4:45 AM EST, 7 minutes before
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</html>Hazardous weather outlook, Mar 11, 3:50 AM EST, 1 hour 2 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE STATE COLLEGE PA 350 AM EST FRI MAR 11 2011 PAZ006-011-012-018-019-025>028-034>037-041-042-045-046-049>053- 056>059-063>066-120900- POTTER-CAMERON-NORTHERN CLINTON-NORTHERN CENTRE-SOUTHERN CENTRE- BLAIR-HUNTINGDON-MIFFLIN-JUNIATA-BEDFORD-FULTON-FRANKLIN-TIOGA- NORTHERN LYCOMING-SULLIVAN-SOUTHERN CLINTON-SOUTHERN LYCOMING-UNION- SNYDER-MONTOUR-NORTHUMBERLAND-COLUMBIA-PERRY-DAUPHIN-SCHUYLKILL- LEBANON-CUMBERLAND-ADAMS-YORK-LANCASTER- 350 AM EST FRI MAR 11 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA. .DAY ONE...TODAY AND TONIGHT. FLOODING WILL CONTINUE TO OCCUR ALONG NUMEROUS SMALLER STREAMS AND CREEKS THIS MORNING. LARGER STREAMS AND RIVERS...ESPECIALLY ACROSS THE SUSQUEHANNA VALLEY AND LOCATIONS TO THE EAST...WILL CONTINUE TO RISE THROUGH TODAY AND INTO TONIGHT WITH MANY POINTS CRESTING ABOVE FLOOD STAGE. PERIODS OF SNOW WILL BRING LIGHT ACCUMULATIONS TO THE NORTHERN MOUNTAINS INTO THIS EVENING. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. MOST LARGER TRIBUTARIES IN THE SUSQUEHANNA RIVER BASIN WILL FALL BELOW FLOOD STAGE BY DAYBREAK SATURDAY...WITH THE FLOOD CREST WORKING ITS WAY SOUTH THROUGH THE WEST AND NORTH BRANCH OF THE SUSQUEHANNA RIVER SATURDAY MORNING. THE FLOOD CREST WILL REACH THE LOWER SUSQUEHANNA MAINSTEM FROM HARRISBURG TO MARIETTA SATURDAY AFTERNOON AND EVENING. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE REQUESTED TO RELAY REPORTS OF STORM TOTAL RAINFALL...AND FLOODING TO THE NATIONAL WEATHER SERVICE IN STATE COLLEGE. PAZ004-005-010-017-024-033-120900- WARREN-MCKEAN-ELK-CLEARFIELD-CAMBRIA-SOMERSET- 350 AM EST FRI MAR 11 2011 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 10 PM EST THIS EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA. .DAY ONE...TODAY AND TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV/STATECOLLEGE ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. WINTER WEATHER ADVISORY. IN ADDITION...FLOODING WILL CONTINUE TO OCCUR ALONG SOME SMALLER STREAMS AND CREEKS THROUGH THIS MORNING. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE REQUESTED TO REPORT SNOW ACCUMULATIONS TO THE NATIONAL WEATHER SERVICE IN STATE COLLEGE. LAMBERT
The office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 10, 7:24 PM EST | Special Weather Statement | CTP | Adams | 36 min |
| Mar 10, 7:55 PM EST | Special Weather Statement | CTP | Cumberland, Dauphin, Lancaster, Lebanon, York | 65 min |
| Mar 10, 8:06 PM EST | River Flood Warning | CTP | Warren | 4 days |
| Mar 11, 12:22 AM EST | River Flood Warning | CTP | Blair, Huntingdon | 10 hr |
| Mar 11, 1:01 AM EST | Winter Weather Advisory | CTP | Cambria, Clearfield, Elk, McKean, Somerset, Warren | 21 hr |
| Mar 11, 1:12 AM EST | River Flood Warning | CTP | Clinton | 20 hr |
| Mar 11, 2:26 AM EST | Areal Flood Warning | CTP | Adams, Bedford, Blair, Cambria, Centre, Clearfield and 11 more | 8 hr |
| Mar 11, 4:27 AM EST | River Flood Warning | CTP | Northumberland, Union | 35 hr |
| Mar 11, 4:27 AM EST | River Flood Warning | CTP | Northumberland, Union | 37 hr |
| Mar 11, 7:35 AM EST | River Flood Warning | CTP | Lycoming | 27 hr |
| Mar 11, 7:35 AM EST | River Flood Warning | CTP | Lycoming, Northumberland, Union | 27 hr |
| Mar 11, 10:02 AM EST | River Flood Warning | CTP | Lycoming | 6 hr |
Nearby
Areal Flood Warnings in Pennsylvania, 2011Every areal flood warning in 2011
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.