Alert archive / Pennsylvania / Flash Flood Warnings in 2021
Flash Flood Warning 24, NWS State College, PA
NWS State College, PA issued this flash flood warning at Sep 1, 2021, 8:54 AM EDT for 9 counties in Pennsylvania. It was in force for 8 hr. 3 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
- Sep 1, 2021, 8:54 AM EDT (12:54 UTC)
- Expired
- Sep 1, 2021, 4:40 PM EDT
- In force
- 8 hr
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
Counties Bedford County, PA, Blair County, PA, Cambria County, PA, Centre County, PA, Clearfield County, PA, Fulton County, PA, Huntingdon County, PA, Mifflin County, PA, Somerset County, PA
The radar
The State College radar (KCCX), 58 km from the middle of the area, began a volume at 12:54 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 |
|---|---|---|---|
| Sep 1, 9:54 AM EDT | HEAVY RAIN 1.58 | 1 E State College, PA | |
| Sep 1, 1:00 PM EDT | FLASH FLOOD | 1 Se Bedford, PA | FLOODING REPORTED ACROSS ROADWAYS. |
| Sep 1, 2:28 PM EDT | FLASH FLOOD | 1 Ene Boalsburg, PA | FLASH FLOODING. CREEKS OVERFLOWING. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 12:00Z, 0.9 hours before the alert went out and 153 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 666 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- -93 m²/s²
- 0-3 km storm-relative helicity
- -7 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
878
WGUS51 KCTP 011254
FFWCTP
PAC009-013-021-027-033-057-061-087-111-011900-
/O.NEW.KCTP.FF.W.0024.210901T1254Z-210901T1900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service State College PA
854 AM EDT Wed Sep 1 2021
The National Weather Service in State College has issued a
* Flash Flood Warning for...
Blair County in central Pennsylvania...
Eastern Cambria County in central Pennsylvania...
Southwestern Centre County in central Pennsylvania...
South Central Clearfield County in central Pennsylvania...
Huntingdon County in central Pennsylvania...
Southwestern Mifflin County in central Pennsylvania...
Bedford County in south central Pennsylvania...
Fulton County in south central Pennsylvania...
Northeastern Somerset County in south central Pennsylvania...
* Until 300 PM EDT Wednesday.
* At 854 AM EDT, Doppler radar and automated rain gauges indicated
heavy rain falling across the warned area. Between 1 and 3 inches
of rain have fallen. Additional rainfall amounts of 1 to 3 inches
are possible in the warned area. Flash flooding is ongoing or
expected to begin shortly.
HAZARD...Life threatening flash flooding. Heavy rain producing
flash flooding.
SOURCE...Radar and automated gauges.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Altoona, State College, Huntingdon, Hollidaysburg, Tyrone,
Bedford, Portage, Breezewood, Park Forest Village, Boalsburg,
Pleasant Gap, Roaring Spring, Mount Union, Stormstown, Lemont,
Clearville, Bald Eagle, New Enterprise, Martinsburg and Lakemont.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4035 7872 4070 7846 4086 7840 4090 7791
4085 7767 4024 7780 3986 7798 3994 7893
FLASH FLOOD...RADAR AND GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
CR2 follow-up statements
025
WGUS51 KCTP 011814
FFWCTP
PAC009-013-021-027-033-057-061-087-111-012100-
/O.EXT.KCTP.FF.W.0024.000000T0000Z-210901T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service State College PA
214 PM EDT Wed Sep 1 2021
The National Weather Service in State College has extended the
* Flash Flood Warning for...
Blair County in central Pennsylvania...
Eastern Cambria County in central Pennsylvania...
Southwestern Centre County in central Pennsylvania...
South Central Clearfield County in central Pennsylvania...
Huntingdon County in central Pennsylvania...
Southwestern Mifflin County in central Pennsylvania...
Bedford County in south central Pennsylvania...
Fulton County in south central Pennsylvania...
Northeastern Somerset County in south central Pennsylvania...
* Until 500 PM EDT.
* At 214 PM EDT, Doppler radar and automated rain gauges indicated
heavy rain falling across the warned area. Between 2 and 4 inches
of rain have fallen. Additional rainfall amounts of 1 to 3 inches
are possible in the warned area. Flash flooding is ongoing or
expected to begin shortly.
HAZARD...Life threatening flash flooding. Heavy rain producing
flash flooding.
SOURCE...Radar and automated gauges.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Altoona, State College, Huntingdon, Hollidaysburg, Tyrone,
Bedford, Portage, Breezewood, Park Forest Village, Boalsburg,
Pleasant Gap, Roaring Spring, Mount Union, Stormstown, Lemont,
Clearville, Bald Eagle, New Enterprise, Martinsburg and Lakemont.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4035 7872 4070 7846 4086 7840 4090 7791
4085 7767 4024 7780 3986 7798 3994 7893
FLASH FLOOD...RADAR AND GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
CR688
WGUS71 KCTP 012040
FFSCTP
Flash Flood Statement
National Weather Service State College PA
440 PM EDT Wed Sep 1 2021
PAC009-013-021-027-033-057-061-087-111-012050-
/O.CAN.KCTP.FF.W.0024.000000T0000Z-210901T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bedford PA-Blair PA-Cambria PA-Centre PA-Clearfield PA-Fulton PA-
Huntingdon PA-Mifflin PA-Somerset PA-
440 PM EDT Wed Sep 1 2021
...FLASH FLOOD WARNING FOR BLAIR, EASTERN CAMBRIA, SOUTHWESTERN
CENTRE, SOUTH CENTRAL CLEARFIELD, HUNTINGDON, SOUTHWESTERN MIFFLIN,
BEDFORD, FULTON AND NORTHEASTERN SOMERSET COUNTIES HAS BEEN REPLACED
WITH A FLOOD WARNING...
Flooding continues in portions of the warned area. Between 3 and 6
inches of rain has fallen. Up to an additional inch of rain is
possible.
LAT...LON 4035 7872 4070 7846 4086 7840 4090 7791
4085 7767 4024 7780 3986 7798 3994 7893
$$
ColbertThe office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 1, 9:37 AM EDT | Flash Flood Warning | CTP | Cambria, Clearfield, Somerset | 6 hr |
| Sep 1, 9:45 AM EDT | Areal Flood Advisory | CTP | Adams, Columbia, Cumberland, Dauphin, Franklin, Juniata and 10 more | 2 hr |
| Sep 1, 11:04 AM EDT | River Flood Warning | CTP | Snyder, Union | 17 hr |
| Sep 1, 11:04 AM EDT | River Flood Warning | CTP | Cambria | 17 hr |
| Sep 1, 11:04 AM EDT | River Flood Warning | CTP | Huntingdon | 23 hr |
| Sep 1, 11:04 AM EDT | River Flood Warning | CTP | Juniata, Mifflin | 20 hr |
| Sep 1, 11:04 AM EDT | River Flood Warning | CTP | Bedford, Huntingdon | 30 hr |
| Sep 1, 11:04 AM EDT | River Flood Warning | CTP | Dauphin | 55 hr |
| Sep 1, 12:04 PM EDT | Flash Flood Warning | CTP | Adams, Columbia, Cumberland, Dauphin, Franklin, Juniata and 10 more | 6 hr |
| Sep 1, 1:09 PM EDT | Flash Flood Warning | CTP | Cambria | 5 hr |
| Sep 1, 2:07 PM EDT | Severe Thunderstorm Warning | CTP | Adams | 53 min |
| Sep 1, 2:28 PM EDT | Severe Thunderstorm Warning | CTP | York | 77 min |
| Sep 1, 3:05 PM EDT | Tornado Warning | CTP | York | 23 min |
| Sep 1, 3:25 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 35 min |
| Sep 1, 3:34 PM EDT | Areal Flood Warning | CTP | Cambria, Clearfield, Somerset | 6 hr |
| Sep 1, 4:21 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 39 min |
| Sep 1, 4:24 PM EDT | Flash Flood Warning | CTP | Adams, York | 4 hr |
| Sep 1, 4:40 PM EDT | Areal Flood Warning | CTP | Bedford, Blair, Cambria, Centre, Clearfield, Franklin and 4 more | 6 hr |
| Sep 1, 5:41 PM EDT | Areal Flood Warning | CTP | Adams, Centre, Columbia, Cumberland, Dauphin, Franklin and 15 more | 14 hr |
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.