Alert archive / Pennsylvania / Tornado Warnings in 1999
Tornado Warning 1, NWS State College, PA
NWS State College, PA issued this tornado warning at Jul 1, 1999, 6:33 PM EDT for Lycoming County, Pennsylvania. It was in force for 37 min. 1 report came from inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.
The facts
- Issued
- Jul 1, 1999, 6:33 PM EDT (22:33 UTC)
- Expired
- Jul 1, 1999, 7:10 PM EDT
- In force
- 37 min
- Issued by
- NWS State College, PA
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Lycoming County, PA
The radar
The State College radar (KCCX), 95 km from the middle of the area, began a volume at 22:32 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 1, 7:00 PM EDT | Tornado F0 | Bodines, PA | A small tornado touched down on McNamie Hill Road about 3 miles east of Bodines near Kellysburg. The storm sheared off about 50 to 75 trees along a 1/2 mile path. a resident on McNamie Hill Road reported seeing debris from the trees being swept in a circle a |
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, 10.6 hours before the alert went out and 217 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
- 1291 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 65 m²/s²
- 0-3 km storm-relative helicity
- 108 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KCTP 012235 RRA TORCTP PAC081-012310- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE STATE COLLEGE PA 633 PM EDT THU JUL 1 1999 THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A * TORNADO WARNING FOR... LYCOMING COUNTY. * UNTIL 710 PM EDT. * AT 627 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM WITH A DEVELOPING TORNADO OVER CENTRAL LYCOMING COUNTY...OR ABOUT 9 MILES NORTHWEST OF WILLIAMSPORT...MOVING NORTHEAST AT 20 MPH. * THE STORM WILL BE NEAR... TROUT RUN AT 635 PM EDT. CALVERT AT 640 PM EDT. BARBOURS AT 650 PM EDT. GO TO A BASEMENT OR A SMALL INTERIOR ROOM ON THE LOWEST FLOOR UNTIL THE STORM HAS PASSED. .ENDJ/DANGELO LAT...LON 4137 7728 4124 7710 4144 7676 4156 7690
What forecasters said that day
The local office's own words before this tornado 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 tornado warning went out at Jul 1, 2:50 PM EDT, 3 hours 43 minutes earlier.
Area forecast discussion, Jul 1, 2:50 PM EDT, 3 hours 43 minutes before
CENTRAL PENNSYLVANIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE STATE COLLEGE PA 250 PM EDT THU JUL 01 1999 STORMS FIRING ATTM IN CONVERGENCE ZONE OVER LAURELS...WITH MAIN AREA OF ACTION STILL BACK OVER OHIO. A BREAK IN THE ACTION IN BETWEEN THESE TWO AREAS...DEPICTED WELL BY MODELS. HAVE PUT CAT POPS IN FIRST PERIOD EVERYWHERE EXCEPT LOWER SUSQ. SOME HEAVY DOWNPOURS LIKELY...BUT DECIDED TO SAVE THAT WORDING FOR SITE SPECIFIC NOWCASTS. SAME FOR HAIL AND GUSTY WINDS. KCCX VWP HAS 40 KTS AT AROUND 10KFT. FZNG LEVEL AROUND 15KFT SHUD LIMIT HAIL SIZE. LOOKS LIKE BACK EDGE OF PRECIP CLEARS MOST OF CTP CWA DURING FRI AFT...WITH POPS DECREASING RAPIDLY AFT 15Z OR SO. CONSIDERED PUTTING CHC POPS BACK IN FOR SAT...BUT PRECLUDED BY LOW CONFIDENCE AT THIS POINT IN WEAK SYSTEMS BEING ABLE TO OVERCOME BUILDING RIDGE. THE FOURTH LOOKS HOT AS A FIRECRACKER...WITH OPPRESIVE DEW POINTS TO BOOT. HOPE PROGGED SUPRESSION OF THE BIG H5 RIDGE BY MID WEEK VERIFIES TO BRING SOME RELIEF. .CTP...NONE. OSTUNO
In the hours before
Special weather statement, Jul 1, 4:30 PM EDT, 2 hours 3 minutes before
PAZ004>006-010>012-017-018-024-025-033-034-037-020300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE STATE COLLEGE PA 430 PM EDT THU JUL 1 1999 ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS EVENING AND EARLY TONIGHT ACROSS THE NORTHERN MOUNTAINS AND LAUREL HIGHLANDS... ...DETAILS... A DEVELOPING STORM SYSTEM OVER OHIO WILL BE PUSHING THUNDERSTORMS INTO PENNSYLVANIA LATER THIS EVENING. WARM AND HUMID AIR IS SPREADING INTO THE NORTHERN MOUNTAINS AND LAUREL HIGHLANDS OF PENNSYLVANIA. THE LINE OF STORMS IN OHIO IS MOVING TO THE EAST...SPURRED ON BY COOLER AIR ALOFT. THIS COMBINATION OF WARM...HUMID AIR AT THE SURFACE AND COOLER AIR ALOFT WILL TRIGGER SHOWERS AND THUNDERSTORMS. THE THUNDERSTORMS CURRENTLY IN CENTRAL PENNSYLVANIA ARE IN ADVANCE OF THIS MAIN LINE OF STORMS...AND DO NOT HAVE THE INSTABILITY NEEDED TO BECOME SEVERE AT THIS TIME. THEY ARE CURRENTLY PRODUCING HEAVY RAIN IN SPOTS...AND ONLY BRIEF WIND GUSTS OVER 30 MPH. THE MAIN LINE OF STORMS DOES HAVE THE POTENTIAL TO BECOME SEVERE. THIS LINE WILL MOVE INTO THE AREA FROM THE WEST DURING THE LATE EVENING AND CONTINUE ACROSS THE AREA THROUGH MIDNIGHT. SOME OF THE THUNDERSTORMS COULD CONTAIN STRONG GUSTY WINDS AND LARGE HAIL. SKYWARN SPOTTER ACTIVATION IS STILL POSSIBLE. PLEASE STAY TUNED TO YOUR NOAA WEATHER RADIO...OR YOUR FAVORITE SOURCE OF WEATHER INFORMATION...FOR THE LATEST FORECASTS AND STATEMENTS ON THIS POTENTIALLY SEVERE WEATHER SITUATION. .END/DANGELO ADDITIONAL WEATHER INFORMATION CAN BE FOUND ON THE INTERNET AT: HTTP://BOOKEND.MET.PSU.EDU (ALL LOWER CASE)
Special weather statement, Jul 1, 4:30 PM EDT, 2 hours 3 minutes before
PAZ004>006-010>012-017-018-024-025-033-034-037-020300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE STATE COLLEGE PA 430 PM EDT THU JUL 1 1999 ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS EVENING AND EARLY TONIGHT ACROSS THE NORTHERN MOUNTAINS AND LAUREL HIGHLANDS... ...DETAILS... A DEVELOPING STORM SYSTEM OVER OHIO WILL BE PUSHING THUNDERSTORMS INTO PENNSYLVANIA LATER THIS EVENING. WARM AND HUMID AIR IS SPREADING INTO THE NORTHERN MOUNTAINS AND LAUREL HIGHLANDS OF PENNSYLVANIA. THE LINE OF STORMS IN OHIO IS MOVING TO THE EAST...SPURRED ON BY COOLER AIR ALOFT. THIS COMBINATION OF WARM...HUMID AIR AT THE SURFACE AND COOLER AIR ALOFT WILL TRIGGER SHOWERS AND THUNDERSTORMS. THE THUNDERSTORMS CURRENTLY IN CENTRAL PENNSYLVANIA ARE IN ADVANCE OF THIS MAIN LINE OF STORMS...AND DO NOT HAVE THE INSTABILITY NEEDED TO BECOME SEVERE AT THIS TIME. THEY ARE CURRENTLY PRODUCING HEAVY RAIN IN SPOTS...AND ONLY BRIEF WIND GUSTS OVER 30 MPH. THE MAIN LINE OF STORMS DOES HAVE THE POTENTIAL TO BECOME SEVERE. THIS LINE WILL MOVE INTO THE AREA FROM THE WEST DURING THE LATE EVENING AND CONTINUE ACROSS THE AREA THROUGH MIDNIGHT. SOME OF THE THUNDERSTORMS COULD CONTAIN STRONG GUSTY WINDS AND LARGE HAIL. SKYWARN SPOTTER ACTIVATION IS STILL POSSIBLE. PLEASE STAY TUNED TO YOUR NOAA WEATHER RADIO...OR YOUR FAVORITE SOURCE OF WEATHER INFORMATION...FOR THE LATEST FORECASTS AND STATEMENTS ON THIS POTENTIALLY SEVERE WEATHER SITUATION. .END/DANGELO ADDITIONAL WEATHER INFORMATION CAN BE FOUND ON THE INTERNET AT: HTTP://BOOKEND.MET.PSU.EDU (ALL LOWER CASE)
The office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 1, 5:14 PM EDT | Severe Thunderstorm Warning | CTP | Bedford | 46 min |
| Jul 1, 5:39 PM EDT | Severe Thunderstorm Warning | CTP | Fulton | 51 min |
| Jul 1, 6:20 PM EDT | Severe Thunderstorm Warning | CTP | Franklin | 55 min |
| Jul 1, 6:50 PM EDT | Tornado Warning | CTP | Sullivan | 55 min |
Nearby
Tornado Warnings in Pennsylvania, 1999Every tornado warning in 1999Tornadoes 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.