Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 213, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Sep 4, 2001, 2:02 PM EDT for Northumberland County, Union County, Pennsylvania. It was in force for 58 min. 1 report 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
- Sep 4, 2001, 2:02 PM EDT (18:02 UTC)
- Expired
- Sep 4, 2001, 3:00 PM EDT
- In force
- 58 min
- Issued by
- NWS State College, PA
- Area
- Whole counties
Counties Northumberland County, PA, Union County, PA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 4, 2:05 PM EDT | Tornado F1 | Montandon, PA | An F1 tornado crossed into Northumberland County from Union County at 13:05 EST. This tornado had estimated wind speeds of 80s mph. The tornado entered the county about 2 miles northwest of the town of Montandon, and tracked southeast, dissipating about 1/2 mi |
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 nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 6.0 hours before the alert went out and 173 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
- 35 J/kg
- Mixed-layer CIN
- -94 J/kg
- Mixed-layer LCL
- 800 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 95 m²/s²
- 0-3 km storm-relative helicity
- 80 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
239 WUUS51 KCTP 041803 SVRCTP PAC097-119-041900- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE STATE COLLEGE PA ISSUED BY NWS BINGHAMTON NY 202 PM EDT TUE SEP 4 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHUMBERLAND COUNTY IN CENTRAL PENNSYLVANIA. UNION COUNTY IN CENTRAL PENNSYLVANIA. * UNTIL 300 PM EDT. * AT 203 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...NEAR NORTHUMBERLAND...OR ABOUT 2 MILES NORTHEAST OF NORTHUMBERLAND...MOVING SOUTHEAST AT 35 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... SNYDERTOWN AROUND 215 PM EDT. THIS IS A DANGEROUS STORM. STAY INDOORS AWAY FROM WINDOWS. $$ CHIARAMONTE
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS State College, PA wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 4, 10:30 AM EDT, 3 hours 32 minutes earlier.
Area forecast discussion, Sep 4, 10:30 AM EDT, 3 hours 32 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE STATE COLLEGE PA ISSUED BY NWS PITTSBURGH PA 1030 AM EDT TUE SEP 4 2001 LOW CLDS WILL GRDLY LIFT RMNDR OF MRNG. FRONTAL BNDRY WORKING THRU NWRN PA ATTM...WILL SLOWLY MOVE SEWD TWD M/D LINE BY EVE. WILL UP POPS TO 50 AMD RAISE WINDS UP TO 15 MPH. REST SAME. .CTP...NONE.
The office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 4, 2:37 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 53 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2001Every severe thunderstorm warning in 2001
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.