Alert archive / Pennsylvania / Flash Flood Warnings in 2004
Flash Flood Warning 7, NWS State College, PA
NWS State College, PA issued this flash flood warning at May 20, 2004, 11:48 PM EDT for Clearfield County, Pennsylvania. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 20, 2004, 11:48 PM EDT (03:48 UTC)
- Expired
- May 21, 2004, 5:45 AM EDT
- In force
- 6 hr
- Issued by
- NWS State College, PA
- Area
- Counties, with a storm outline in the text
County Clearfield County, PA
The radar
The State College radar (KCCX), 60 km from the middle of the area, began a volume at 03:51 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
Pittsburgh, PA (KPIT), launched 00:00Z, 3.8 hours before the alert went out and 143 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
- 1205 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 1103 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 163 m²/s²
- 0-3 km storm-relative helicity
- 267 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 7.9
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS51 KCTP 210355
FFWCTP
PAC033-210945-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1148 PM EDT THU MAY 20 2004
THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CLEARFIELD COUNTY IN CENTRAL PENNSYLVANIA
* UNTIL 545 AM EDT.
* AT 1140 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
CLUSTER OF THUNDERSTORMS WITH VERY HEAVY RAINFALL OVER WEST
CENTRAL CLEARFIELD COUNTY.
SLOW MOVING THUNDERSTORMS WILL PRODUCE TORRENTIAL RAINFALL IN THE
WARNED AREA...WITH RAINFALL RATES OF 1.5 INCHES PER HOUR OR GREATER
EXPECTED. MINOR STREET FLOODING HAS BEEN REPORTED BY LOCAL LAW
ENFORCEMENT IN DUBOIS.
ADDITIONAL THUNDERSTORMS WITH TORRENTIAL RAINFALL WILL TRACK ALONG
THE SAME PATH. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL LIKELY CAUSE
FLASH FLOODING IN PARTS OF WEST CENTRAL CLEARFIELD COUNTY THROUGH
THE EARLY MORNING HOURS. SOME TOWNS INCLUDED IN THE FLASH FLOOD
WARNING AREA INCLUDE DUBOIS...TREASURE LAKE...ROCKTON AND FALLS
CREEK.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED. MOVE TO
HIGHER GROUND. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO
RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS.
LAT...LON 4114 7856 4094 7856 4106 7881 4116 7881
4122 7873
$$
DEVOIR/LAMBERT/LIPTON/RXR1 follow-up statement
000
WGUS71 KCTP 210704
FFSCTP
PAC033-211000-
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
255 AM EDT FRI MAY 21 2004
...A FLASH FLOOD WARNING CONTINUES FOR CLEARFIELD COUNTY UNTIL 545 AM
EDT...
SEVERAL CLUSTERS OF THUNDERSTORMS CONTAINING VERY HEAVY RAIN WILL
AFFECT CLEARFIELD COUNTY THROUGH 5 AM...PRODUCING ADDITIONAL
RAINFALL AMOUNTS OF 1 TO 2 INCHES. THIS ADDITIONAL HEAVY
RAIN...COMBINED WITH HEAVY RAINFALL FROM EARLIER
THUNDERSTORMS...WILL LIKELY LEAD TO FLOODING FROM RUNOFF.
THE NORTHWEST PART OF CLEARFIELD COUNTY WILL BE PARTICULARLY
VULNERABLE TO FLOODING...ESPECIALLY FROM NEAR DUBOIS TO AROUND
ROCKTON.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED. MOVE TO
HIGHER GROUND.
LAT...LON 4116 7877 4076 7880 4076 7841 4113 7814
4122 7811 4123 7849 4124 7863
$$
KL/BLThe office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 10:51 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield | 54 min |
| May 20, 11:18 PM EDT | Severe Thunderstorm Warning | CTP | Warren | 72 min |
| May 21, 4:54 AM EDT | Flash Flood Warning | CTP | Clearfield | 4 hr |
| May 21, 5:19 AM EDT | Flash Flood Warning | CTP | Warren | 4 hr |
| May 21, 6:29 AM EDT | Severe Thunderstorm Warning | CTP | Cambria, Somerset | 61 min |
| May 21, 6:31 AM EDT | Flash Flood Warning | CTP | Blair | 4 hr |
| May 21, 7:11 AM EDT | Severe Thunderstorm Warning | CTP | Bedford, Blair | 49 min |
| May 21, 6:55 PM EDT | Severe Thunderstorm Warning | CTP | Cambria, Clearfield, Somerset | 80 min |
| May 21, 7:30 PM EDT | Severe Thunderstorm Warning | CTP | Bedford, Blair | 60 min |
Nearby
Flash Flood Warnings in Pennsylvania, 2004Every flash flood warning in 2004
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.