Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 40, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at May 25, 1998, 7:45 AM EDT for Tioga County, Pennsylvania. It was in force for 35 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
- May 25, 1998, 7:45 AM EDT (11:45 UTC)
- Expired
- May 25, 1998, 8:20 AM EDT
- In force
- 35 min
- Issued by
- NWS State College, PA
- Area
- Whole counties
County Tioga County, PA
The radar
The State College radar (KCCX), 113 km from the middle of the area, began a volume at 11:45 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 nearest sounding before it
Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 11.8 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2617 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 104 m²/s²
- 0-3 km storm-relative helicity
- 147 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
206 WUUS01 KCTP 251143 RRA SVRCTP PAC117-251220- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE STATE COLLEGE PA 745 AM EDT MON MAY 25 1998 THE NATIONAL WEATHER SERVICE IN STATE COLLEGE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN TIOGA COUNTY IN NORTH CENTRAL PENNSYLVANIA * UNTIL 820 AM EDT * AT 743 AM EDT... STATE COLLEGE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM WITH LARGE HAIL IN THE VICINITY OF MANSFIELD MOVING EAST AT 40 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... COVINGTON BY 746 AM EDT MILLERTON BY 750 AM EDT GLEASON BY 810 AM EDT THIS IS A DANGEROUS STORM STAY INDOORS AWAY FROM WINDOWS. NICOSIA/LA CORTE
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 May 25, 3:35 AM EDT, 4 hours 10 minutes earlier.
Area forecast discussion, May 25, 3:35 AM EDT, 4 hours 10 minutes before
CENTRAL PENNSYLVANIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE STATE COLLEGE PA 335 AM EDT MON MAY 25 1998 ...WRKZNS SENT TO NWSFO/S PIT AND PHL VIA PHLADMCTP... ...DISCUSSION... SCATTERED SHRA/TSRA WORKG INTO CNTRL/SRN PA IN ASSCTN WITH LL THETA-E ADVTN IN ADVANCE OF WELL-DEFINED UPR LVL SHRT WAVE OVR THE ERN LAKES. SCTRD SHRA/TSRA WERE FIRING CLSE TO THE GRADIENT OF 850 MB THETA-E CLSE TO THE LL WRM FRNT. AS THIS WAVE PASSES TO THE E... IT WILL ALLOW A LL THETA-E RDG TO BECOME ESTABLISHED ACROSS CNTRL/ERN PA THIS AM AS THE WRM FRNT PASSES THRU PA. THUS... SCTRD SHRA/TSRA WILL CONT DURG THE ERLY AM HOURS ACRS CNTRL PA. THINK THIS ACVTY WILL DIE DOWN AFTER SUNRISE AS BNDRY LYR HEATING AND GROWTH BEGIN TO DISRUPT THE NOCTURNALLY ENHANCED LL INFLO OF THESE STORMS. ANTHR UPR LVL WAVE WAS CLEARLY SEEN OVR SRN MINN/IA THIS AM. THIS FEATURE IS PROGGED TO SLIDE E REACHING THIS ERN LAKES BY 0000 UTC THIS EVE. THIS FEATURE WILL BE THE IMPETUS TO PUSH A CD FRNT THRU PA WITH STRG LL DRY ADVECTION TAKING PLACE. THE LL THETA-E RDG OVR PA IS PUSHED TO THE E BY THIS EVE AS A RESULT. THE AMS BECOMES SOMEWHAT UNSTBL BY AFTRN... ESP FM THE SUS VLLY EWRD. THINK THIS NEXT WAVE WILL FORCE THE NEXT ROUND OF ACVTY FOR CWA SO KEPT CHC POPS IN ZONES ALL DAY TO ACCOUNT FOR THIS AM/S ACVTY AND THE EXPECTED RESURGENCE OF SHRA/TSRA THIS AFTRN. THINK SOME OF THIS ACVTY BLEEDS OVR INTO THE EVE HOURS IN ERN ZONES. WINDS FIELDS WILL BE RATHER POTENT THIS AFTRN AS AN 850 MB JET WORKS THRU PA. MID-LVL WINDS WILL BE ROARING UP TO 50 KTS OR GREATER. WITH PLENTY OF MID-UPR LVL DRY AIR AVBL AS PER WV CHANNEL... THINK PTNL EXISTS FOR SOME STRG TO SVR STORMS MAINLY FOR ERN PA THIS AFTRN/EVE. AFTER THIS SECOND UPR LVL WAVE PASSES TONIGHT COOLER DRIER AIR PRESSES S INTO PA. THEN... A THIRD SHRT WAVE SEEN OVR CO ATTM MOVES INTO THE PICTURE. THIS WAVE REACHES THE MID-WEST BY LATE MON NGT AS AN ANTHR IMPRESSIVE UPR LVL WAVE DROPS S FM CANADA. THE COMBINATION OF THESE TWO WAVES WILL CREATE A STRG JET STREAK OVR THE NERN U.S. THIS WILL LEAD A FRONTOGENETICALLY ACTIVE REGION N OF THE SFC BNDRY WHICH WILL RESIDE SOMEWHERE OVR THE MID-ATLANTIC STATES MON NGT SUGGESTIVE OF SOME POST FRONTAL LIGHT RAINS. ETA FGEN FIELDS SHWG SOME FGEN FRCG FOR SRN PA MON NGT AND INTO ERLY TUE FOR SERN ZONES. THUS HV LO CHC POPS MON NGT SRN ZONES WITH SOME POPS BLEEDING OVR INTO TUE AM IN THE LWR SUS VLLY. REST OF ZONES DRY TONIGHT/TUE GIVEN STRG LL CAA AND DRY ADVECTION. NICOSIA
The office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 25, 5:05 AM EDT | Severe Thunderstorm Warning | CTP | Centre, Clearfield | 55 min |
| May 25, 5:37 AM EDT | Severe Thunderstorm Warning | CTP | Centre | 63 min |
| May 25, 5:42 AM EDT | Severe Thunderstorm Warning | CTP | Centre | 58 min |
| May 25, 6:00 AM EDT | Severe Thunderstorm Warning | CTP | Mifflin, Snyder | 50 min |
| May 25, 6:43 AM EDT | Severe Thunderstorm Warning | CTP | Snyder | 17 min |
| May 25, 7:30 AM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 30 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 1998Every severe thunderstorm warning in 1998
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.