Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 5, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Mar 9, 2002, 11:17 PM EST for Lancaster County, York County, Pennsylvania. It was in force for 73 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Mar 9, 2002, 11:17 PM EST (04:17 UTC)
- Expired
- Mar 10, 2002, 12:30 AM EST
- In force
- 73 min
- Issued by
- NWS State College, PA
- Area
- Whole counties
Counties Lancaster County, PA, York County, PA
The radar
The Sterling radar (KLWX), 141 km from the middle of the area, began a volume at 04:19 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 |
|---|---|---|---|
| Mar 9, 11:35 PM EST | Thunderstorm Wind 50 E | York, PA | Trees and wires were reported down in York. |
| Mar 10, 12:10 AM EST | Thunderstorm Wind 50 E | Ephrata, PA | Trees were reported down in Ephrata. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Mar 9, 8:30 PM EST | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 4.3 hours before the alert went out and 139 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
- 445 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 657 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 375 m²/s²
- 0-3 km storm-relative helicity
- 418 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 4.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS51 KCTP 100417 SVRCTP PAC071-133-100530- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE STATE COLLEGE PA 1114 PM EST SAT MAR 9 2002 THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... LANCASTER COUNTY IN PENNSYLVANIA YORK COUNTY IN PENNSYLVANIA * UNTIL 1230 AM EST. * AT 1114 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM 8 MILES NORTH OF VALLEY GREEN TO 7 MILES SOUTHWEST OF PENNVILLE...MOVING EAST AT 35 MPH. * SEVERE THUNDERSTORMS WILL BE NEAR... SPRING GROVE AT 1120 PM. YORK AND MANCHESTER AT 1125 PM. ELIZABETHTOWN AND CODORUS AT 1130 PM. STONYBROOK AND SPRY AT 1135 PM. SHREWSBURY AND RED LION AT 1140 PM. WRIGHTSVILLE AND WINDSOR AT 1145 PM. LANCASTER AT 1210 AM. THESE STORMS HAVE A HISTORY OF PRODUCING WIND GUSTS TO 60 MPH. TAKE SHELTER IMMEDIATELY. $$ &
The office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 9, 10:33 PM EST | Severe Thunderstorm Warning | CTP | Columbia, Montour, Northumberland, Snyder, Union | 42 min |
| Mar 9, 10:44 PM EST | Severe Thunderstorm Warning | CTP | Lycoming, Sullivan | 31 min |
| Mar 9, 10:45 PM EST | Severe Thunderstorm Warning | CTP | Dauphin, Lebanon, Schuylkill | 60 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2002Every severe thunderstorm warning in 2002
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.