Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 167, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Sep 11, 1997, 6:19 PM EDT for York County, Pennsylvania. It was in force for 56 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 11, 1997, 6:19 PM EDT (22:19 UTC)
- Expired
- Sep 11, 1997, 7:15 PM EDT
- In force
- 56 min
- Issued by
- NWS State College, PA
- Area
- Whole counties
County York County, PA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 11, 6:25 PM EDT | Thunderstorm Wind 50 | Menges Mill, PA | Trees and wires were blown down near Menges Mill in Jackson and Heidelburg townships. |
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
Washington/Dulle, VA (KIAD), launched 12:00Z, 10.3 hours before the alert went out and 122 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
- 16 J/kg
- Mixed-layer CIN
- -36 J/kg
- Mixed-layer LCL
- 550 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 111 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
288 WUUS01 KCTP 112223 RRA SVRCTP PAC133-112315- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE STATE COLLEGE PA 619 PM EDT THU SEP 11 1997 THE NATIONAL WEATHER SERVICE IN STATE COLLEGE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 715 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATIONS...... IN PENNSYLVANIA ...YORK COUNTY AT 619 PM WEATHER SERVICE DOPPLER RADAR SHOWED A LINE OF SEVERE THUNDERSTORMS ALONG THE WESTERN BORDER OF YORK COUNTY. THIS LINE WILL MOVE NORTHEAST AND REACH THE CITY OF YORK BY 645 PM. WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A STRONG BUILDING. DO NOT STAND BY WINDOWS. DONT USE TELEPHONES OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM HAS PASSED. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS. WINTHER
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 11, 2:20 PM EDT, 3 hours 59 minutes earlier.
Area forecast discussion, Sep 11, 2:20 PM EDT, 3 hours 59 minutes before
CENTRAL PENNSYLVANIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE STATE COLLEGE PA 215 PM EDT THU SEP 11 1997 THINGS VERY BUSY TODAY AT NWSO CTP TODAY...SO WILL KEEP THE DISCUSSION SHORT. ALL RIVER FLOOD AND FLASH FLOOD WARNINGS HAVE NOW EXPIRED IN THE CWA. RADAR SHOWS SCATTERED SHOWERS AND PATCHES OF RAIN AGAIN BLOSSOMING ACROSS THE REGION. ALTHOUGH THERE ARE STILL SOME HEAVY RAIN PRODUCING CELLS IN THE AREA...THE SW FLOW NOW DOES NOT SUPPORT TRAINING OF CELLS LIKE LAST NIGHT. WEAK SURFACE FRONT IS LIMPING THROUGH THE STATE ATTM...WITH SURFACE WINDS ACROSS CENTRAL AND WESTERN SECTIONS HAVING TURNED TO THE SOUTHWEST. VAD WINDS ALSO SHOWING THE VEERING TO THE SW. MODELS INDICATE THAT DRIER AIR WILL SLOWLY MOVE INTO THE REGION TONIGHT AS SHORTWAVE MOVE NORTHEAST OF THE AREA. THEREFORE EXPECT RAIN TO SLOWLY DIMINISH OVERNIGHT ACROSS CENTRAL SECTIONS. STILL CLOUDS...DRIZZLE AND SOME SHOWERS WILL BE PREVALENT LATER TONIGHT INTO THE MORNING. EARLY TOMORROW...NEXT VORT CENTER APPROACHES AS UPPER LOW CENTER AND COLD CORE FINALLY PULLS ACROSS THE REGION BEFORE MOVING OUT. MODELS ALSO SHOW WEAK SECONDARY FRONT CROSSING THE REGION AROUND 18Z. THINK SHOWERS WILL BE POSSIBLE TOMORROW WITH THE COLD POCKET ALOFT. ALTHOUGH INSTABILITIES LIMITED...POSSIBLE THUNDERSTORMS COULD BE EXPECTED ACROSS THE LOWER SUSQUEHANNA VALLEY AS CAPES APPROACH 800. JUNG
The office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 10, 11:30 PM EDT | Flash Flood Warning | CTP | Cumberland, Franklin, Perry | 4 hr |
| Sep 11, 12:20 AM EDT | Flash Flood Warning | CTP | Adams | 4 hr |
| Sep 11, 12:57 AM EDT | Flash Flood Warning | CTP | Snyder, Union | 4 hr |
| Sep 11, 12:57 AM EDT | Flash Flood Warning | CTP | Juniata | 4 hr |
| Sep 11, 3:27 AM EDT | Flash Flood Warning | CTP | Adams, Cumberland, Perry | 5 hr |
| Sep 11, 4:00 AM EDT | Flash Flood Warning | CTP | Lancaster | 4 hr |
| Sep 11, 4:57 AM EDT | Flash Flood Warning | CTP | Juniata, Snyder | 3 hr |
| Sep 11, 7:46 AM EDT | Flash Flood Warning | CTP | Cumberland, Perry | 3 hr |
| Sep 11, 10:41 AM EDT | Flash Flood Warning | CTP | Cumberland, Perry | 3 hr |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 1997Every severe thunderstorm warning in 1997
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.