Alert archive / Pennsylvania / Flood Watches in 2021

Flood Watch 2, NWS State College, PA

July 16, 20219 counties in Pennsylvania

NWS State College, PA issued this flood watch at Jul 16, 2021, 1:22 PM EDT for 9 counties in Pennsylvania. It took effect at Jul 16, 2021, 10:00 PM EDT. It was in force for .

The area

The counties it named.

The facts

Issued
Jul 16, 2021, 1:22 PM EDT (17:22 UTC)
In effect from
Jul 16, 2021, 10:00 PM EDT
Expired
Jul 16, 2021, 1:43 PM EDT
In force
Issued by
NWS State College, PA
Flood severity
None

Counties Cameron County, PA, Clinton County, PA, Elk County, PA, Lycoming County, PA, McKean County, PA, Potter County, PA, Sullivan County, PA, Tioga County, PA, Warren County, PA

The radar

The State College radar (KCCX), 71 km from the middle of the area, began a volume at 17:20 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

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 5.4 hours before the alert went out and 166 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.

Skew-T log-pSkew-T log-p diagram, Buffalo Intl Airport, NY at 12:00Z on 2021-07-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Buffalo Intl Airport, NY at 12:00Z on 2021-07-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1011 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
117 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

026 
WGUS61 KCTP 161722
FFACTP

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service State College PA
122 PM EDT Fri Jul 16 2021

PAZ004>006-010>012-037-041-042-045-046-171200-
/O.NEW.KCTP.FA.A.0002.210717T0200Z-210718T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Warren-McKean-Potter-Elk-Cameron-Northern Clinton-Tioga-Northern
Lycoming-Sullivan-Southern Clinton-Southern Lycoming-
Including the cities of Bradford, St. Marys, Coudersport, Wellsboro, 
Renovo, Laporte, Lock Haven, Trout Run, Emporium, Williamsport, 
Mansfield, Ridgway, and Warren
122 PM EDT Fri Jul 16 2021

...FLOOD WATCH IN EFFECT FROM 10 PM EDT THIS EVENING THROUGH 
SATURDAY EVENING...

The National Weather Service in State College has issued a

* Flood Watch for a portion of central Pennsylvania, including the 
  following areas, Cameron, Elk, McKean, Northern Clinton, Northern 
  Lycoming, Potter, Southern Clinton, Southern Lycoming, Sullivan, 
  Tioga and Warren.

* From 10 PM EDT this evening through Saturday evening.

* A slow moving front will focus rounds of locally heavy rainfall 
  across the Watch area tonight and Saturday. Extremely wet soils 
  will lead to rapid runoff and possible flash flooding in areas of 
  heavy rain.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be alert for possible Flood 
Warnings. Those living in areas prone to flooding should be prepared 
to take action should flooding develop.

&&

$$

DeVoir
1 follow-up statement
187 
WGUS61 KCTP 161743
FFACTP

Flood Watch
National Weather Service State College PA
143 PM EDT Fri Jul 16 2021

PAZ004>006-010>012-037-041-042-045-046-161845-
/O.CAN.KCTP.FA.A.0002.210717T0200Z-210718T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Warren-McKean-Potter-Elk-Cameron-Northern Clinton-Tioga-Northern
Lycoming-Sullivan-Southern Clinton-Southern Lycoming-
Including the cities of Bradford, St. Marys, Coudersport, Wellsboro, 
Renovo, Laporte, Lock Haven, Trout Run, Emporium, Williamsport, 
Mansfield, Ridgway, and Warren
143 PM EDT Fri Jul 16 2021

...FLOOD WATCH IS CANCELLED...

A Flash Flood Watch was intended and will be issued in its place.

The Flood Watch is cancelled. 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 15, 9:40 PM EDTSpecial Weather StatementCTPWarren50 min
Jul 16, 1:46 PM EDTFlash Flood WatchCTPAdams, Cameron, Clinton, Columbia, Dauphin, Elk and 12 more32 hr
Jul 16, 1:59 PM EDTSpecial Weather StatementCTPMontour31 min
Jul 16, 2:05 PM EDTAreal Flood AdvisoryCTPLycoming, Sullivan2 hr
Jul 16, 2:18 PM EDTSevere Thunderstorm WarningCTPMcKean, Potter42 min
Jul 16, 2:29 PM EDTSpecial Weather StatementCTPMontour31 min
Jul 16, 2:52 PM EDTSpecial Weather StatementCTPPotter23 min
Jul 16, 2:59 PM EDTAreal Flood AdvisoryCTPColumbia, Montour, Northumberland2 hr
Jul 16, 2:59 PM EDTSpecial Weather StatementCTPColumbia31 min
Jul 16, 3:14 PM EDTSpecial Weather StatementCTPPotter31 min
Jul 16, 3:19 PM EDTSpecial Weather StatementCTPMontour26 min
Jul 16, 3:22 PM EDTSpecial Weather StatementCTPJuniata, Perry38 min
Jul 16, 3:54 PM EDTSpecial Weather StatementCTPClearfield36 min
Jul 16, 4:07 PM EDTSpecial Weather StatementCTPClearfield38 min
Jul 16, 4:11 PM EDTSevere Thunderstorm WarningCTPClearfield49 min
Jul 16, 4:18 PM EDTSpecial Weather StatementCTPTioga42 min
Jul 16, 4:20 PM EDTFlash Flood WarningCTPColumbia, Montour, Northumberland, Union85 min
Jul 16, 4:29 PM EDTSevere Thunderstorm WarningCTPClearfield46 min
Jul 16, 4:30 PM EDTSevere Thunderstorm WarningCTPTioga45 min
Jul 16, 4:47 PM EDTSevere Thunderstorm WarningCTPLycoming43 min
Jul 16, 4:57 PM EDTSpecial Weather StatementCTPClinton33 min
Jul 16, 4:59 PM EDTAreal Flood AdvisoryCTPLycoming, Tioga2 hr
Jul 16, 5:10 PM EDTAreal Flood AdvisoryCTPSullivan3 hr
Jul 16, 5:13 PM EDTSevere Thunderstorm WarningCTPClinton, Lycoming32 min
Jul 16, 5:25 PM EDTSpecial Weather StatementCTPCarbon20 min
Jul 16, 5:31 PM EDTFlash Flood WarningCTPSullivan108 min
Jul 16, 5:32 PM EDTSpecial Weather StatementCTPClinton28 min
Jul 16, 5:44 PM EDTSpecial Weather StatementCTPCentre31 min
Jul 16, 6:01 PM EDTSpecial Weather StatementCTPCentre29 min
Jul 16, 6:02 PM EDTSevere Thunderstorm WarningCTPSullivan45 min
Jul 16, 6:31 PM EDTSpecial Weather StatementCTPUnion29 min
Jul 16, 6:52 PM EDTSpecial Weather StatementCTPColumbia23 min
Jul 16, 6:57 PM EDTSpecial Weather StatementCTPUnion33 min
Jul 16, 7:15 PM EDTAreal Flood AdvisoryCTPColumbia, Lycoming, Montour, Northumberland, Snyder, Union2 hr

Nearby

Flood Watches in Pennsylvania, 2021Every flood watch in 2021

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.