Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 105, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Jul 18, 1997, 4:32 PM EDT for Clinton County, Lycoming County, Pennsylvania. It was in force for 63 min. 3 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
- Jul 18, 1997, 4:32 PM EDT (20:32 UTC)
- Expired
- Jul 18, 1997, 5:35 PM EDT
- In force
- 63 min
- Issued by
- NWS State College, PA
- Area
- Whole counties
Counties Clinton County, PA, Lycoming County, PA
The radar
The State College radar (KCCX), 68 km from the middle of the area, began a volume at 20:31 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 |
|---|---|---|---|
| Jul 18, 4:35 PM EDT | Tornado F1 | Woolrich, PA | 41/12/07N, 77/24/14W to 41/10N, 77/22W. An F1 tornado touched down about 1 mile west of Woolrich on Friday, July 18th. The storm moved southeast along a 3-1/2 mile path crossing Crestmont into McElhattan. At the initial touchdown, just west of Woolrich, mos |
| Jul 18, 4:50 PM EDT | Thunderstorm Wind 51 | Rauchtown, PA | Trees were down along Route 880 near Rauchtown. |
| Jul 18, 4:52 PM EDT | Thunderstorm Wind 51 | Williamsport, PA | Trees and wires down. |
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 |
|---|---|---|---|
| Jul 18, 1:45 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 8.5 hours before the alert went out and 214 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
- 7 J/kg
- Mixed-layer CIN
- -94 J/kg
- Mixed-layer LCL
- 1353 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- 132 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 Jul 18, 12:44 PM EDT, 3 hours 48 minutes earlier.
Area forecast discussion, Jul 18, 12:44 PM EDT, 3 hours 48 minutes before
CENTRAL PENNSYLVANIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE STATE COLLEGE PA 1240 PM EDT FRI JUL 18 1997 ...SUGGESTIONS... .PIT/PHL...CURRENT ZNS LOOK GOOD SO FAR. ...DISCUSSION... NOT MUCH YET...WNW FLOW AND LOW DEWPTS DONT SUPPORT MUCH...BUT STILL SOME FAIRLY HI DEWPTS FEEDING E FROM S. ONT/MI INTO NY. FIRST FRONT IS NEAR LAKE ONT...WAITING FOR VERY STRONG SECONDARY FRONT/STRONG MID LEVEL WIND MAX TO CATCH IT. LOOKS LIKE THERE IS SOME NICE LOOKING T/CI BANDS OVER LAKE ONT. FEW CELLS TRYING TO GET GOING NOW OVER W NY/AND E NY. THINK BEST CHC FOR ANY ACTION WOULD BE NE PA AND PTS N AND E...GIVEN THE ABOVE FACTORS...AND FCST TRACK OF FIRST VORT LOBE. HARD TO BELIEVE THAT SIT. WILL NOT SET OFF SOME REALY UGLY STORMS. WITH ACTION NEAR MAX HEATING...AND LOTS OF DRY AIR AT LOWER LEVELS...IF THERE IS MUCH MID LEVEL MOISTURE...THEN STRONG DAMAGING WINDS LIKELY...GIVEN MID LEVEL WIND MAX. MAIN FRONT AND SHOT OF COLD AIR DOES NOT CLEAR PA TO LATE TONIGHT. MUCH COOLER ON SAT. HEIGHTS ARE NOT REAL LOW ON SAT...THUS MOST OF THE CU/SC SHOULD BE ACROSS NE PA AND PTS N AND E. A COOL NIGHT SAT NIGHT FOR N PA...AS WINDS DIE DOWN. A NICE DAY ON SUN. ENJOY. ^LONG TERM NOT A BIG CHANGE IN THE PATTERN. SMALL CHC THAT REMAINS OF DANNY COULD BRUSH S PA...AS NEXT FRONT HEADS SE BY ABOUT MID WEEK...BUT I WOULD NOT COUNT ON IT. MARTIN
In the hours before
Special weather statement, Jul 18, 11:15 AM EDT, 5 hours 17 minutes before
PAZ004>006-010>012-017>019-024>028-033>037-041-042-045-046- 049>053-056>059-063>066-182300- SPECIAL WEATHER STATEMENT - SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE STATE COLLEGE PA 1115 AM EDT FRI JUL 18 1997 THE STORM PREDICTION CENTER IN NORMAN OKLAHOMA SAYS THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF CENTRAL PENNSYLVANIA INTO THIS EVENING. THE BEST CHANCE FOR SEVERE WEATHER WILL BE MAINLY EAST OF A MANSFIELD...LOCK HAVEN...BEDFORD LINE. SKYWARN ACTIVATION MAY BE NEEDED LATER. MARTIN
Special weather statement, Jul 18, 11:16 AM EDT, 5 hours 16 minutes before
PAZ004>006-010>012-017>019-024>028-033>037-041-042-045-046- 049>053-056>059-063>066-182300- SPECIAL WEATHER STATEMENT - SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE STATE COLLEGE PA 1115 AM EDT FRI JUL 18 1997 THE STORM PREDICTION CENTER IN NORMAN OKLAHOMA SAYS THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF CENTRAL PENNSYLVANIA INTO THIS EVENING. THE BEST CHANCE FOR SEVERE WEATHER WILL BE MAINLY EAST OF A MANSFIELD...LOCK H2AVEN...BEDFORD LINE. SKYWARN ACTIVATION MAY BE NEEDED LATER. MARTIN
Special weather statement, Jul 18, 2:03 PM EDT, 2 hours 29 minutes before
PAZ004>006-010>012-017>019-037-041-042-045-046-190105- SPECIAL WEATHER STATEMENT - SEVERE THUNDERSTORM WATCH NATIONAL WEATHER SERVICE STATE COLLEGE PA 203 PM EDT FRI JUL 18 1997 ...A SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 8 PM FOR MUCH OF NORTH CENTRAL PENNSYVLANIA... THE WATCH INCLUDES WARREN...MCKEAN...POTTER...ELK...CAMERON... CLEARFIELD...CLINTON...CENTRE...TIOGA...LYCOMING...AND SULLIVAN COUNTIES. SEVERE THUNDERSTORMS ARE POSSIBLE IN AND CLOSE TO THE WATCH AREA. DAMAGING WINDS AND LARGE HAIL ARE POSSIBLE. PERSONS ACROSS THE REGION SHOULD LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. SEEK SHELTER IF WARNINGS ARE ISSUED...OR SEVERE WEATHER IS NOTED. A STRONG COLD FRONT MOVING FROM NORTH TO SOUTH IS EXPECTED TO TRIGGER SEVERE STORMS. MARTIN
Special weather statement, Jul 18, 2:04 PM EDT, 2 hours 28 minutes before
PAZ004>006-010>012-017>019-037-041-042-045-046-190105- SPECIAL WEATHER STATEMENT - SEVERE THUNDERSTORM WATCH NATIONAL WEATHER SERVICE STATE COLLEGE PA 203 PM EDT FRI JUL 18 1997 ...A SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 8 PM FOR MUCH OF NORTH CENTRAL PENNSYVLANIA... THE WATCH INCLUDES WARREN...MCKEAN...POTTER...ELK...CAMERON... CLEARFIELD...CLINTON...CENTRE...TIOGA...LYCOMING...AND SULLIVAN COUNTIES. SEVERE THUNDERSTORMS ARE POSSIBLE IN AND CLOSE TO THE WATCH AREA. DAMAGING WINDS AND LARGE HAIL ARE POSSIBLE. PERSONS ACROSS THE REGION SHOULD LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. SEEK SHELTER IF WARNINGS ARE ISSUED...OR SEVERE WEATHER IS NOTED. A STRONG COLD FRONT MOVING FROM NORTH TO SOUTH IS EXPECTED TO TRIGGER SEVERE STORMS. MARTIN
The office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 3:02 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, McKean, Potter | 58 min |
| Jul 18, 3:30 PM EDT | Severe Thunderstorm Warning | CTP | Clinton | 65 min |
| Jul 18, 3:56 PM EDT | Severe Thunderstorm Warning | CTP | Bedford | 79 min |
| Jul 18, 4:01 PM EDT | Severe Thunderstorm Warning | CTP | McKean, Potter | 79 min |
| Jul 18, 4:24 PM EDT | Severe Thunderstorm Warning | CTP | Cameron | 61 min |
| Jul 18, 4:35 PM EDT | Severe Thunderstorm Warning | CTP | Cambria | 65 min |
| Jul 18, 4:44 PM EDT | Tornado Warning | CTP | Clinton | 36 min |
| Jul 18, 4:58 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Montour, Northumberland | 62 min |
| Jul 18, 4:58 PM EDT | Severe Thunderstorm Warning | CTP | Union | 62 min |
| Jul 18, 5:07 PM EDT | Tornado Warning | CTP | Union | 48 min |
| Jul 18, 5:50 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 60 min |
| Jul 18, 5:59 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clearfield | 61 min |
| Jul 18, 6:34 PM EDT | Severe Thunderstorm Warning | CTP | Mifflin | 46 min |
| Jul 18, 6:50 PM EDT | Severe Thunderstorm Warning | CTP | Juniata | 45 min |
| Jul 18, 7:04 PM EDT | Tornado Warning | CTP | Perry | 46 min |
| Jul 18, 7:15 PM EDT | Severe Thunderstorm Warning | CTP | Cambria | 50 min |
| Jul 18, 7:31 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Dauphin | 64 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; radar from the NEXRAD Level II archive.