Alert archive / Pennsylvania / Flash Flood Warnings in 2021
Flash Flood Warning 1, NWS State College, PA
NWS State College, PA issued this flash flood warning at Jun 9, 2021, 6:37 PM EDT for Schuylkill County, Pennsylvania. It was in force for 3 hr. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 9, 2021, 6:37 PM EDT (22:37 UTC)
- Expired
- Jun 9, 2021, 9:30 PM EDT
- In force
- 3 hr
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
- Flood severity
- None
County Schuylkill County, PA
The radar
The Philadelphia radar (KDIX), 159 km from the middle of the area, began a volume at 22:39 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 9, 8:02 PM EDT | HEAVY RAIN 4.03 | Orwigsburg, PA | |
| Jun 9, 8:15 PM EDT | FLASH FLOOD | 2 Nw Schuylkill Haven, PA | ROUTE 901 WASHED OUT IN NORTH MANHEIM TOWNSHIP (JUST NORTH OF CRESSONA). |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 10.6 hours before the alert went out and 217 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
- 193 J/kg
- Mixed-layer CIN
- -128 J/kg
- Mixed-layer LCL
- 1225 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -75 m²/s²
- 0-3 km storm-relative helicity
- 3 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
839
WGUS51 KCTP 092237
FFWCTP
PAC107-100130-
/O.NEW.KCTP.FF.W.0001.210609T2237Z-210610T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service State College PA
637 PM EDT Wed Jun 9 2021
The National Weather Service in State College has issued a
* Flash Flood Warning for...
Southeastern Schuylkill County in central Pennsylvania...
* Until 930 PM EDT.
* At 637 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain in Auburn and Schuylkill Haven. Between 2 and 4 inches
of rain have fallen. Flash flooding is ongoing or expected to
begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Doppler radar.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other
drainage and low lying areas.
* Some locations that will experience flash flooding include...
Pottsville, Schuylkill Haven, St. Clair, Orwigsburg, Port Carbon,
Friedensburg, Marlin, Renningers, Mechanicsville, McKeansburg,
Lake Wynonah, Cressona, Palo Alto, Auburn, Deer Lake, Cumbola,
Port Clinton, New Ringgold, Landingville and Mount Carbon.
Additional rainfall amounts of 1 to 2 inches are possible in the
warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Move to higher ground now. Act quickly to protect your life.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses
as well as other drainage areas and low lying spots.
&&
LAT...LON 4054 7614 4060 7625 4069 7623 4072 7604
4068 7591 4067 7591 4064 7598 4057 7602
4058 7604 4057 7605 4058 7606 4057 7608
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR
$$
RG/MD2 follow-up statements
285
WGUS71 KCTP 092350
FFSCTP
Flash Flood Statement
National Weather Service State College PA
750 PM EDT Wed Jun 9 2021
PAC107-100130-
/O.CON.KCTP.FF.W.0001.000000T0000Z-210610T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Schuylkill PA-
750 PM EDT Wed Jun 9 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 930 PM EDT THIS
EVENING FOR SOUTHEASTERN SCHUYLKILL COUNTY...
At 750 PM EDT, emergency management reported flash flooding across
the warned area. Between 2 and 5 inches of rain have fallen. Flash
flooding is already occurring.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Emergency management.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other
drainage and low lying areas.
Some locations that will experience flash flooding include...
Pottsville, Schuylkill Haven, St. Clair, Orwigsburg, Port Carbon,
Friedensburg, Marlin, Renningers, Mechanicsville, McKeansburg,
Lake Wynonah, Cressona, Palo Alto, Auburn, Deer Lake, Cumbola,
Port Clinton, New Ringgold, Landingville and Mount Carbon.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Move to higher ground now. Act quickly to protect your life.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses
as well as other drainage areas and low lying spots.
&&
LAT...LON 4054 7614 4060 7625 4069 7623 4072 7604
4068 7591 4067 7591 4064 7598 4057 7602
4058 7604 4057 7605 4058 7606 4057 7608
FLASH FLOOD...OBSERVED
EXPECTED RAINFALL...0.25 INCHES IN 1 HOUR
$$
RG/MD587
WGUS71 KCTP 100122
FFSCTP
Flash Flood Statement
National Weather Service State College PA
922 PM EDT Wed Jun 9 2021
PAC107-100132-
/O.EXP.KCTP.FF.W.0001.000000T0000Z-210610T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Schuylkill PA-
922 PM EDT Wed Jun 9 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 930 PM EDT THIS EVENING FOR
SOUTHEASTERN SCHUYLKILL COUNTY...
Flood waters have receded. The heavy rain has ended. Flooding is no
longer expected to pose a threat. Please continue to heed remaining
road closures.
LAT...LON 4054 7614 4060 7625 4069 7623 4072 7604
4068 7591 4067 7591 4064 7598 4057 7602
4058 7604 4057 7605 4058 7606 4057 7608
$$
RG/MDThe office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 9, 1:37 PM EDT | Special Weather Statement | CTP | Tioga | 53 min |
| Jun 9, 2:04 PM EDT | Severe Thunderstorm Warning | CTP | Potter | 26 min |
| Jun 9, 2:11 PM EDT | Special Weather Statement | CTP | Clearfield | 34 min |
| Jun 9, 2:18 PM EDT | Special Weather Statement | CTP | Elk | 27 min |
| Jun 9, 2:36 PM EDT | Special Weather Statement | CTP | Potter | 24 min |
| Jun 9, 2:43 PM EDT | Special Weather Statement | CTP | Blair | 32 min |
| Jun 9, 2:51 PM EDT | Special Weather Statement | CTP | Potter | 24 min |
| Jun 9, 2:55 PM EDT | Special Weather Statement | CTP | Dauphin | 35 min |
| Jun 9, 2:59 PM EDT | Special Weather Statement | CTP | Centre | 31 min |
| Jun 9, 3:03 PM EDT | Special Weather Statement | CTP | Huntingdon | 27 min |
| Jun 9, 3:08 PM EDT | Special Weather Statement | CTP | McKean | 37 min |
| Jun 9, 3:14 PM EDT | Special Weather Statement | CTP | Cameron | 31 min |
| Jun 9, 3:27 PM EDT | Special Weather Statement | CTP | Dauphin | 33 min |
| Jun 9, 3:36 PM EDT | Special Weather Statement | CTP | Forest | 24 min |
| Jun 9, 3:52 PM EDT | Special Weather Statement | CTP | McKean | 23 min |
| Jun 9, 4:02 PM EDT | Severe Thunderstorm Warning | CTP | McKean, Warren | 28 min |
| Jun 9, 4:31 PM EDT | Special Weather Statement | CTP | Warren | 59 min |
| Jun 9, 5:09 PM EDT | Special Weather Statement | CTP | Warren | 66 min |
| Jun 9, 5:13 PM EDT | Special Weather Statement | CTP | York | 62 min |
| Jun 9, 5:35 PM EDT | Areal Flood Advisory | CTP | Cumberland, York | 85 min |
| Jun 9, 5:36 PM EDT | Special Weather Statement | CTP | Schuylkill | 54 min |
| Jun 9, 5:46 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 44 min |
| Jun 9, 6:00 PM EDT | Special Weather Statement | CTP | Adams | 30 min |
| Jun 9, 6:14 PM EDT | Areal Flood Advisory | CTP | Schuylkill | 23 min |
| Jun 9, 6:28 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 62 min |
| Jun 9, 6:30 PM EDT | Special Weather Statement | CTP | York | 45 min |
| Jun 9, 6:38 PM EDT | Special Weather Statement | CTP | Lycoming | 52 min |
| Jun 9, 7:05 PM EDT | Special Weather Statement | CTP | Lancaster | 40 min |
| Jun 9, 7:09 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 51 min |
| Jun 9, 7:54 PM EDT | Special Weather Statement | CTP | Lancaster | 36 min |
Nearby
Flash Flood Warnings in Pennsylvania, 2021Every flash flood warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.