Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 75, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Jul 7, 1997, 2:12 PM EDT for Tioga County, Pennsylvania. It was in force for 48 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
- Jul 7, 1997, 2:12 PM EDT (18:12 UTC)
- Expired
- Jul 7, 1997, 3:00 PM EDT
- In force
- 48 min
- Issued by
- NWS State College, PA
- Area
- Whole counties
County Tioga County, PA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 7, 2:25 PM EDT | Hail 0.75 | Lawrenceville, PA |
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, 6.2 hours before the alert went out and 175 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
- 181 J/kg
- Mixed-layer CIN
- -33 J/kg
- Mixed-layer LCL
- 573 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 77 m²/s²
- 0-3 km storm-relative helicity
- 90 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KCTP 071814 RRA SVRCTP PAC117-071900- BULLETIN- IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE STATE COLLEGE PA 212 PM EDT MON JUL 7 1997 THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 300 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTH CENTRAL PENNSYLVANIA ...TIOGA COUNTY AT 211 PM EDT...A SEVERE THUNDERSTORM WAS INDICATED BY STATE COLLEGE DOPPLER RADAR 18 MILES NORTH OF MANSFIELD OR 4 MILES NORTH OF COWANESQUE LAKE MOVING EAST AT 25 MPH. THE STORM WILL PASS NEAR THE FOLLOWING LOCATIONS... COWANESQUE LAKE BY 215 PM EDT LAWRENCEVILLE BY 220 PM EDT MILLERTON BY 240 PM EDT SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH... DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE INDOORS AND STAY AWAY FROM WINDOWS. HEAVY RAINS FLOOD ROADS QUICKLY. DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. 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 Jul 7, 1:43 PM EDT, 29 minutes earlier.
Area forecast discussion, Jul 7, 1:43 PM EDT, 29 minutes before
CENTRAL PENNSYLVANIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE STATE COLLEGE PA 140 PM EDT MON JUL 7 1997 ...ZONE SUGGESTIONS... ...PIT/PHL...MIGHT HAVE TO TWEAK EVENING HRS DEPENDING ON HOW MUCH DEVELOPMENT WE GET FROM THESE STORMS. OTHER THAN THAT WUD JUST BACK OFF FROM INCREASING CLOUDS IN THE EAST TMRW. ...DISCUSSION... SMALL LINE OF STORMS ASSOC WITH WEAK FRONT OVER NRN MTNS LOOKS POTENTIALLY SEVERE. 88D SAYS 100% PROB OF 1" HAIL SO WARNINGS STARTING TO FLY. AIRMASS IS MARGINALLY UNSTABLE WITH SOME LOW LEVEL CONVERGENCE. STORMS ARE MOVING TWD HIGHER THETA-E AIR BUT SHUD START TO LOSE LL CONVERGENCE. LINE SEEMS TO ALREADY BE LOSING DEFINITION BACK TWD NW PA AND ERN OHIO. THIS WUD POINT TO NOT EXPECTING A WIDESPREAD OUTBREAK. FURTHER EAST AIRMASS HAS YET TO START TO RESPOND TO PROGGED EFFECTS OF LEE SIDE TROFFING. NO MOISTURE CONVERGENCE AS YET AND MESO DATA FROM PSU SHOWS LI'S AOA ZERO. SATELLITE SHOWS NO OBVIOUS SIGNS OF MESOSCALE ORGANIZATION. MAY HAVE TO WAIT TIL LATER IF THINGS GET GOING AT ALL. LATER IN WEEK ANOTHER SHORTWAVE APPROACHES AND SPREADS WHAT MAY BE THE FIRST SIG WIDESPREAD RAINS TO HAPPEN IN A WHILE INTO THE REGION. AVN TAKES UPPER FLOW WHICH IS FAIRLY ZONAL NOW AND BUCKLES IT CONSIDERABLY. AS RIDGE IS MADE TO BUILD INTO CTRL CANADA... RESULT IS DOWNSTREAM INTENSIFICATION OF SHORTWAVE SLIDING EAST OUT OF THE ROCKIES. WHERE THE FRONTAL OVERRUNNING SETS UP WILL BE ALL IMPORTANT AS TO WHO GETS HEAVY RAIN. AT THIS TIME AVN MAKES BEST RAINS SURGE NORTH OF US...BEFORE WE SEE MORE RAIN DEVELOP UNDER DEEPENING UPPER TROF. ECMWF ALSO DRAWS A PICTURE LIKE THIS...IN FACT IS DEEPER WITH UPPER LOW AND SUGGESTS A VERY COOL RAIN UNDER A CLOSING ODFF UPPER LOW WHICH WUD SUPPORT A LOW SOMEWHERE EAST OF HERE. WHATEVER HAPPENS HOPE TO SEE SOME RAIN...THINGS ARE LOOKING PRETTY DRY LA CORTE
In the hours before
Local storm report, Jul 7, 2:12 PM EDT, 0 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE HARRISBURG, PA
212 PM EDT MON JUL 07 1997
TIME(EDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0130 PM MYRTLE PA WIND DAMAGE
07/07/97 MCKEAN COUPLE TREES BLOWN DOWN 1
WEST OF MYRTLE. SOME HAIL
SIZE UNKNOWN.The office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 1:14 PM EDT | Severe Thunderstorm Warning | CTP | McKean | 61 min |
| Jul 7, 1:35 PM EDT | Severe Thunderstorm Warning | CTP | Potter | 65 min |
| Jul 7, 3:37 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 63 min |
| Jul 7, 4:12 PM EDT | Severe Thunderstorm Warning | CTP | Sullivan | 63 min |
| Jul 7, 5:09 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 61 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.