Alert archive / Pennsylvania / River Flood Warnings in 2020

River Flood Warning 17, NWS State College, PA

December 24, 2020Dauphin County, Lebanon County, Pennsylvania

NWS State College, PA issued this river flood warning at Dec 24, 2020, 5:31 PM EST for Dauphin County, Lebanon County, Pennsylvania. It took effect at Dec 25, 2020, 10:00 AM EST. It was in force for 30 hr.

The area

The counties it named.

The facts

Issued: Dec 24, 2020, 5:31 PM EST (22:31 UTC)
In effect from: Dec 25, 2020, 10:00 AM EST
Expired: Dec 26, 2020, 4:26 PM EST
In force: 30 hr
Issued by: NWS State College, PA
Area: Storm-based polygon
Flood severity: Minor

Counties Dauphin County, PA, Lebanon County, PA

The radar

The State College radar (KCCX), 131 km from the middle of the area, began a volume at 22:32 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 river

Written for the forecast point Swatara Creek near Hershey (HERP1). The gauge peaked at 8.93 ft at Dec 26, 2020, 4:00 AM EST.

Action stage: 6 ft
Minor stage: 7 ft
Moderate stage: 10 ft
Major stage: 14 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 01573560, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

What forecasters said that day

The local office's own words before this river 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 river flood warning went out at Dec 24, 4:30 PM EST, 1 hour 1 minute earlier.

Area forecast discussion, Dec 24, 4:30 PM EST, 1 hour 1 minute before

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Hazardous weather outlook, Dec 24, 10:12 AM EST, 7 hours 19 minutes before

Hazardous Weather Outlook
National Weather Service State College PA
1012 AM EST Thu Dec 24 2020

PAZ028-036-037-041-042-046-049>053-056>059-063>066-251515-
Juniata-Franklin-Tioga-Northern Lycoming-Sullivan-Southern Lycoming-
Union-Snyder-Montour-Northumberland-Columbia-Perry-Dauphin-
Schuylkill-Lebanon-Cumberland-Adams-York-Lancaster-
1012 AM EST Thu Dec 24 2020

...FLOOD WATCH IN EFFECT THROUGH FRIDAY MORNING...

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.

   Flood Watch.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Please listen to NOAA Weather Radio or go to
weather.gov/StateCollege on the internet for more
information about the following hazards.

   Flood Watch.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report rainfall and flooding.

PAZ005-010-017-024-033-251515-
McKean-Elk-Clearfield-Cambria-Somerset-
1012 AM EST Thu Dec 24 2020

...WINTER WEATHER ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 7 PM
EST FRIDAY...

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.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

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.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

PAZ012-018-019-025>027-034-035-045-251515-
Northern Clinton-Northern Centre-Southern Centre-Blair-Huntingdon-
Mifflin-Bedford-Fulton-Southern Clinton-
1012 AM EST Thu Dec 24 2020

...FLOOD WATCH IN EFFECT THROUGH FRIDAY MORNING...

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.

   Flood Watch.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Please listen to NOAA Weather Radio or go to
weather.gov/StateCollege on the internet for more
information about the following hazards.

   Flood Watch.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report rainfall and flooding.

PAZ004-251515-
Warren-
1012 AM EST Thu Dec 24 2020

...WINTER STORM WARNING IN EFFECT FROM 7 PM THIS EVENING TO 7 PM EST
FRIDAY...

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 Storm Warning.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Please listen to NOAA Weather Radio or go to
weather.gov/StateCollege on the internet for more
information about the following hazards.

   Winter Storm Warning.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

PAZ006-011-251515-
Potter-Cameron-
1012 AM EST Thu Dec 24 2020

...FLOOD WATCH IN EFFECT THROUGH FRIDAY MORNING...
...WINTER WEATHER ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 7 PM
EST FRIDAY...

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.

   Flood Watch.
   Winter Weather Advisory.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Please listen to NOAA Weather Radio or go to
weather.gov/StateCollege on the internet for more
information about the following hazards.

   Flood Watch.
   Winter Weather Advisory.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

In the hours before

Local storm report, Dec 24, 2:26 PM EST, 3 hours 5 minutes before

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Local storm report, Dec 24, 3:14 PM EST, 2 hours 17 minutes before

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Local storm report, Dec 24, 5:24 PM EST, 7 minutes before

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Local storm report, Dec 24, 5:27 PM EST, 4 minutes before

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Local storm report, Dec 24, 5:29 PM EST, 2 minutes before

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Local storm report, Dec 24, 5:31 PM EST, 0 minutes before

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The office that day

Everything else NWS State College, PA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 23, 11:51 PM EST	River Flood Warning	CTP	Dauphin, Juniata, Northumberland, Perry, Snyder, Union	21 days
Dec 24, 2:53 AM EST	Winter Storm Warning	CTP	Warren	40 hr
Dec 24, 4:15 PM EST	Areal Flood Advisory	CTP	Cameron, Centre, Clinton, Lycoming, Potter, Sullivan and 1 more	4 hr
Dec 24, 5:31 PM EST	River Flood Warning	CTP	Snyder, Union	28 hr
Dec 24, 5:31 PM EST	River Flood Warning	CTP	Perry	25 hr
Dec 24, 5:31 PM EST	River Flood Warning	CTP	Lebanon, Schuylkill	40 hr
Dec 24, 5:31 PM EST	River Flood Warning	CTP	Cumberland	55 hr
Dec 24, 5:31 PM EST	River Flood Warning	CTP	Lycoming	49 hr
Dec 24, 5:31 PM EST	River Flood Warning	CTP	Lycoming, Northumberland, Union	50 hr
Dec 24, 5:58 PM EST	River Flood Warning	CTP	Centre, Clinton	18 hr
Dec 24, 5:58 PM EST	River Flood Warning	CTP	Huntingdon	25 hr
Dec 24, 6:29 PM EST	Areal Flood Warning	CTP	Lycoming, Sullivan	10 hr

Nearby

River Flood Warnings in Pennsylvania, 2020 Every river flood warning in 2020

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.