Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 63, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Jun 24, 1997, 2:57 PM EDT for Clinton County, Pennsylvania. It was in force for 63 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
- Jun 24, 1997, 2:57 PM EDT (18:57 UTC)
- Expired
- Jun 24, 1997, 4:00 PM EDT
- In force
- 63 min
- Issued by
- NWS State College, PA
- Area
- Whole counties
County Clinton County, PA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 24, 3:40 PM EDT | Thunderstorm Wind 51 | Hyner, PA | Thunderstorms blew down trees along Route 120 near Hyner then continued southeast taking down powerlines in Lock Haven. |
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
Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 7.0 hours before the alert went out and 208 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
- 268 J/kg
- Mixed-layer CIN
- -103 J/kg
- Mixed-layer LCL
- 649 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 256 m²/s²
- 0-3 km storm-relative helicity
- 351 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KCTP 241857 RRA SVRCTP PAC035-242000- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE STATE COLLEGE PA 257 PM EDT TUE JUN 24 1997 THE NATIONAL WEATHER SERVICE IN STATE COLLEGE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 400 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATIONS...... IN PENNSYLVANIA ...CLINTON COUNTY AT 255 PM...DOPPLER WEATHER RADAR SHOWED A SEVERE THUNDERSTORM NORTHWEST OF RENOVO. THE STORM IS MOVING TO THE SOUTHEAST AND WILL AFFECT RENOVO BETWEEN 3 AND 315 PM...AND LOCK HAVEN AFTER 330 PM. WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A STRONG BUILDING. DO NOT STAND BY WINDOWS. DON'T USE TELEPHONES OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM HAS PASSED. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS. JUNG
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 Jun 24, 2:33 PM EDT, 24 minutes earlier.
Area forecast discussion, Jun 24, 2:33 PM EDT, 24 minutes before
CENTRAL PENNSYLVANIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE STATE COLLEGE PA 230 PM EDT TUE JUN 24 1997 ***SUGGESTIONS*** .PIT...TONIGHT...WUD LIMIT MENTION OF TSRA TO EVENING HOURS RATHER THAN ENTIRE NIGHT FOR NW MTNS. WEDNESDAY...HI TEMPS FM NR 90 NW MTNS TO M90S IN THE VALLEYS OF SC MTNS. .PHL...NONE. ***DISCUSSION*** 17Z SFC OBS INDICATE WARM FRT HAS MADE IT INTO NE PA. EARLIER MCS...ASSOCIATED WITH WAA MAX N OF FRNT...HAS PUSHED E OF CWA. MEANWHILE...CU HAVE DEVELOPED IN HUMID/UNSTABLE AIRMASS ACROSS W PA. A FEW PULSE TYPE STORMS HAVE FORMED OVER N MTNS. JUDGING BY SATELLITE TRENDS AND MODEL INSTABILITIES...WUD CARRY CHC POPS THIS EVENING FOR JUST N MTNS. MODEL SOUNDINGS AS WELL AS PIT VWP SHOWING WEAK SHEAR...LIKELY SUPPORTING NON SEVERE BUT SLOW MOVING STORMS. TONIGHT...AFTER SCT EVENING TSRA OVER NW...IT LOOKS MCLR AND DRY OVERNIGHT AS UPPER LVL RIDGE AXIS BUILDS OVR PA. WEDNESDAY...H85 HGHT/TEMPS INDICATE A WARMER DAY THAN TDY BY SEVERAL DEGREES WITH THE HELP OF PLENTY OF HAZY SUNSHINE. EVEN NW MTNS SHOULD EXCEED 90 DEGREES WITH SOME SPOTS OVER LOWER SUSQ APPROACHING THE CENTURY MARK. FORCING LOOKS WEAK BUT WITH CAPES BTWN 1000 AND 2000 (FM 12Z ETA) WUD MENTION OF 30 POPS FOR AFTN CONVECTION. FITZGERALD
The office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 24, 3:57 PM EDT | Severe Thunderstorm Warning | CTP | Clinton | 63 min |
| Jun 24, 4:38 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 32 min |
| Jun 24, 4:43 PM EDT | Severe Thunderstorm Warning | CTP | Union | 62 min |
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.