Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 111, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Jul 9, 1999, 10:50 PM EDT for Lebanon County, Schuylkill County, Pennsylvania. It was in force for 55 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 9, 1999, 10:50 PM EDT (02:50 UTC)
- Expired
- Jul 9, 1999, 11:45 PM EDT
- In force
- 55 min
- Issued by
- NWS State College, PA
- Area
- Whole counties
Counties Lebanon County, PA, Schuylkill County, PA
The radar
The State College radar (KCCX), 147 km from the middle of the area, began a volume at 02:50 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.
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 9, 6:45 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 9, 10:00 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 00:00Z, 2.8 hours before the alert went out and 295 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1694 m above ground
- 0-6 km bulk shear
- 67 kt
- 0-1 km storm-relative helicity
- 314 m²/s²
- 0-3 km storm-relative helicity
- 509 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 9, 9:50 PM EDT, 1 hour earlier.
Area forecast discussion, Jul 9, 9:50 PM EDT, 1 hour before
CENTRAL PENNSYLVANIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
950 PM EDT FRI JUL 9 1999
NOT MUCH TIME TONIGHT. LINE OF SEVERE STORMS IS CURRENTLY TRACKING
EAST ACROSS THE CENTRAL COUNTIES. WIDESPREAD TREE DAMAGE HAS BEEN
REPORTED BY JUST ABOUT EVERY COUNTY TO THE WEST OF CTP. WILL END THE
WATCH FOR COUNTIES WEST OF THE ALLEGHENY FRONT AS STORMS ARE ENDING
FROM THERE ON WEST. WATCH IS BEING EXTENDED TO COVER ALL OF THE LOWER 6
SUSQ. ZONES OUT SHORTLY AFTER 10 PM.
.CTP...SEVERE THUNDERSTORM WATCH...CENTRAL COUNTIES UNTIL MIDNIGHT.
SEVERE THUNDERSTORM WATCH...LOWER SUSQ UNTIL 3 AM.
MSEIn the hours before
Special weather statement, Jul 9, 8:05 PM EDT, 2 hours 45 minutes before
PAZ004>006-010>012-017>019-024>028-033>036-037-041-042-045-046- 049>053-058-100410- SPECIAL WEATHER STATEMENT - SEVERE THUNDERSTORM WATCH NATIONAL WEATHER SERVICE STATE COLLEGE PA 805 PM EDT FRI JUL 9 1999 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR MUCH OF CENTRAL PENNSYLVANIA UNTIL MIDNIGHT... THE WATCH INCLUDES THE FOLLOWING COUNTIES... WARREN...MCKEAN...POTTER...CAMERON...ELK...CLEARFIELD... CAMBRIA...BLAIR...CENTRE...HUNTINGDON...MIFFLIN...JUNIATA... TIOGA...SULLIVAN...LYCOMING...UNION...SNYDER...MONTOUR... NORTHUMBERLAND...COLUMBIA...AND SCHUYLKILL. THE FOLLOWING COUNTIES ARE NOW ALSO INCLUDED... SOMERSET...BEDFORD...FULTON...AND FRANKLIN. SEVERE THUNDERSTORMS ARE POSSIBLE IN AND CLOSE THE THE WATCH AREA. REMEMBER...SEVERE THUNDERSTORMS CAN PRODUCE DAMAGING WINDS... LARGE HAIL...DANGEROUS LIGHTNING...AND TORRENTAIL RAIN. REMAIN ALERT FOR RAPID CHANGES IN WEATHER CONDITIONS THIS EVENING. THE STORMS WILL QUICKLY MOVE EASTWARD ACROSS MUCH OF THE REGION BY 10 PM. THE MAJORITY OF THE STORMS WILL ARRIVE IN THE SUSQUEHANNA VALLEY AFTER 10 PM. PERSONS ACROSS THE REGION SHOULD SEEK SHELTER IF WARNINGS ARE ISSUED OR SEVERE WEATHER IS NOTED. LISTEN FOR LATER INFORMATION ON NOAA WEATHER RADIO...OR YOUR FAVORITE TV ...CABLE TV...OR RADIO STATION. .END/ MARTIN
Special weather statement, Jul 9, 8:05 PM EDT, 2 hours 45 minutes before
PAZ004>006-010>012-017>019-024>028-033>036-037-041-042-045-046- 049>053-058-100410- SPECIAL WEATHER STATEMENT - SEVERE THUNDERSTORM WATCH NATIONAL WEATHER SERVICE STATE COLLEGE PA 805 PM EDT FRI JUL 9 1999 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR MUCH OF CENTRAL PENNSYLVANIA UNTIL MIDNIGHT... THE WATCH INCLUDES THE FOLLOWING COUNTIES... WARREN...MCKEAN...POTTER...CAMERON...ELK...CLEARFIELD... CAMBRIA...BLAIR...CENTRE...HUNTINGDON...MIFFLIN...JUNIATA... TIOGA...SULLIVAN...LYCOMING...UNION...SNYDER...MONTOUR... NORTHUMBERLAND...COLUMBIA...AND SCHUYLKILL. THE FOLLOWING COUNTIES ARE NOW ALSO INCLUDED... SOMERSET...BEDFORD...FULTON...AND FRANKLIN. SEVERE THUNDERSTORMS ARE POSSIBLE IN AND CLOSE THE THE WATCH AREA. REMEMBER...SEVERE THUNDERSTORMS CAN PRODUCE DAMAGING WINDS... LARGE HAIL...DANGEROUS LIGHTNING...AND TORRENTAIL RAIN. REMAIN ALERT FOR RAPID CHANGES IN WEATHER CONDITIONS THIS EVENING. THE STORMS WILL QUICKLY MOVE EASTWARD ACROSS MUCH OF THE REGION BY 10 PM. THE MAJORITY OF THE STORMS WILL ARRIVE IN THE SUSQUEHANNA VALLEY AFTER 10 PM. PERSONS ACROSS THE REGION SHOULD SEEK SHELTER IF WARNINGS ARE ISSUED OR SEVERE WEATHER IS NOTED. LISTEN FOR LATER INFORMATION ON NOAA WEATHER RADIO...OR YOUR FAVORITE TV ...CABLE TV...OR RADIO STATION. .END/ MARTIN
Special weather statement, Jul 9, 10:04 PM EDT, 46 minutes before
PAZ004>006-010-011-017-037-100255- SPECIAL WEATHER STATEMENT- WATCH CANCELLATION NATIONAL WEATHER SERVICE STATE COLLEGE PA 1004 PM EDT FRI JUL 9 1999 THE SEVERE THUNDERSTORM WATCH HAS BEEN CANCELLED FOR THE FOLLOWING COUNTIES IN CENTRAL PENNSYLVANIA... WARREN...MCKEAN...POTTER...ELK...CAMERON...AND CLEARFIELD. THE LINE OF STRONG TO SEVERE THUNDERSTORMS HAS MOVED EAST OF THE AREA. THE THREAT OF SEVERE WEATHER HAS ENDED...AND THE WATCH IS CANCELLED. STAY TUNED TO THIS STATION FOR THE LATEST WEATHER INFORMATION DIRECT FROM THE NATIONAL WEATHER SERVICE. .END/MSE
Special weather statement, Jul 9, 10:04 PM EDT, 46 minutes before
PAZ004>006-010-011-017-037-100255- SPECIAL WEATHER STATEMENT- WATCH CANCELLATION NATIONAL WEATHER SERVICE STATE COLLEGE PA 1004 PM EDT FRI JUL 9 1999 THE SEVERE THUNDERSTORM WATCH HAS BEEN CANCELLED FOR THE FOLLOWING COUNTIES IN CENTRAL PENNSYLVANIA... WARREN...MCKEAN...POTTER...ELK...CAMERON...AND CLEARFIELD. THE LINE OF STRONG TO SEVERE THUNDERSTORMS HAS MOVED EAST OF THE AREA. THE THREAT OF SEVERE WEATHER HAS ENDED...AND THE WATCH IS CANCELLED. STAY TUNED TO THIS STATION FOR THE LATEST WEATHER INFORMATION DIRECT FROM THE NATIONAL WEATHER SERVICE. .END/MSE
Special weather statement, Jul 9, 10:22 PM EDT, 28 minutes before
PAZ012-018-019-024>028-033>037-041-042-045-046-049>053-056>059- 063>066-100700- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE STATE COLLEGE PA 1022 PM EDT FRI JUL 9 1999 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR MUCH OF SOUTH CENTRAL PENNSYLVANIA UNTIL MIDNIGHT... THE WATCH INCLUDES THE FOLLOWING COUNTIES... CAMBRIA...SOMERSET...BLAIR...CENTRE...HUNTINGDON...BEDFORD AND FULTON. ...A SEVERE THUNDERSTORM WATCH IS NOW ALSO IN EFFECT FOR MUCH OF THE SUSQUEHANNA VALLEY OF CENTRAL PENNSYLVANIA UNTIL 3 AM EDT... THIS WATCH INCLUDES THE FOLLOWING COUNTIES... MIFFLIN...JUNIATA...TIOGA...SULLIVAN...CLINTON...LYCOMING...UNION... SNYDER...MONTOUR...NORTHUMBERLAND...COLUMBIA..AND SCHUYLKILL... ADAMS...CUMBERLAND...PERRY...DAUPHIN...LEBANON...YORK AND LANCASTER. SEVERE THUNDERSTORMS ARE POSSIBLE IN AND CLOSE T0 THE WATCH AREA. REMEMBER...SEVERE THUNDERSTORMS CAN PRODUCE DAMAGING WINDS... LARGE HAIL...DANGEROUS LIGHTNING...AND TORRENTIAL RAIN. REMAIN ALERT FOR RAPID CHANGES IN WEATHER CONDITIONS OVERNIGHT. THE MAJORITY OF THE STORMS WILL ARRIVE IN THE SUSQUEHANNA VALLEY AFTER 11 PM. PERSONS ACROSS THE REGION SHOULD SEEK SHELTER IF WARNINGS ARE ISSUED OR SEVERE WEATHER IS NOTED. LISTEN FOR LATER INFORMATION ON NOAA WEATHER RADIO...OR YOUR FAVORITE TV...CABLE TV...OR RADIO STATION. .END/ HEAD
Special weather statement, Jul 9, 10:22 PM EDT, 28 minutes before
PAZ012-018-019-024>028-033>037-041-042-045-046-049>053-056>059- 063>066-100700- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE STATE COLLEGE PA 1022 PM EDT FRI JUL 9 1999 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR MUCH OF SOUTH CENTRAL PENNSYLVANIA UNTIL MIDNIGHT... THE WATCH INCLUDES THE FOLLOWING COUNTIES... CAMBRIA...SOMERSET...BLAIR...CENTRE...HUNTINGDON...BEDFORD AND FULTON. ...A SEVERE THUNDERSTORM WATCH IS NOW ALSO IN EFFECT FOR MUCH OF THE SUSQUEHANNA VALLEY OF CENTRAL PENNSYLVANIA UNTIL 3 AM EDT... THIS WATCH INCLUDES THE FOLLOWING COUNTIES... MIFFLIN...JUNIATA...TIOGA...SULLIVAN...CLINTON...LYCOMING...UNION... SNYDER...MONTOUR...NORTHUMBERLAND...COLUMBIA..AND SCHUYLKILL... ADAMS...CUMBERLAND...PERRY...DAUPHIN...LEBANON...YORK AND LANCASTER. SEVERE THUNDERSTORMS ARE POSSIBLE IN AND CLOSE T0 THE WATCH AREA. REMEMBER...SEVERE THUNDERSTORMS CAN PRODUCE DAMAGING WINDS... LARGE HAIL...DANGEROUS LIGHTNING...AND TORRENTIAL RAIN. REMAIN ALERT FOR RAPID CHANGES IN WEATHER CONDITIONS OVERNIGHT. THE MAJORITY OF THE STORMS WILL ARRIVE IN THE SUSQUEHANNA VALLEY AFTER 11 PM. PERSONS ACROSS THE REGION SHOULD SEEK SHELTER IF WARNINGS ARE ISSUED OR SEVERE WEATHER IS NOTED. LISTEN FOR LATER INFORMATION ON NOAA WEATHER RADIO...OR YOUR FAVORITE TV...CABLE TV...OR RADIO STATION. .END/ HEAD
The office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 8:00 PM EDT | Severe Thunderstorm Warning | CTP | Elk | 40 min |
| Jul 9, 8:06 PM EDT | Severe Thunderstorm Warning | CTP | Potter | 39 min |
| Jul 9, 8:24 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Clearfield | 66 min |
| Jul 9, 8:28 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 62 min |
| Jul 9, 8:47 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Elk, Potter | 28 min |
| Jul 9, 8:50 PM EDT | Severe Thunderstorm Warning | CTP | Clinton | 70 min |
| Jul 9, 9:00 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 90 min |
| Jul 9, 9:01 PM EDT | Severe Thunderstorm Warning | CTP | Blair, Cambria | 59 min |
| Jul 9, 9:22 PM EDT | Tornado Warning | CTP | Cambria, Clearfield | 23 min |
| Jul 9, 9:28 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon | 77 min |
| Jul 9, 9:30 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 75 min |
| Jul 9, 9:34 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 26 min |
| Jul 9, 9:39 PM EDT | Severe Thunderstorm Warning | CTP | Sullivan | 66 min |
| Jul 9, 9:40 PM EDT | Tornado Warning | CTP | Centre, Huntingdon | 50 min |
| Jul 9, 9:47 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Mifflin, Snyder, Union | 73 min |
| Jul 9, 10:00 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Montour, Northumberland | 75 min |
| Jul 9, 10:04 PM EDT | Severe Thunderstorm Warning | CTP | Clinton | 16 min |
| Jul 9, 10:19 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Perry | 86 min |
| Jul 9, 11:05 PM EDT | Severe Thunderstorm Warning | CTP | Bedford | 40 min |
| Jul 9, 11:28 PM EDT | Severe Thunderstorm Warning | CTP | Cambria, Somerset | 32 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 1999Every severe thunderstorm warning in 1999
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.