Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 23, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at May 4, 1998, 10:25 PM EDT for Huntingdon County, Pennsylvania. It was in force for 45 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 4, 1998, 10:25 PM EDT (02:25 UTC)
- Expired
- May 4, 1998, 11:10 PM EDT
- In force
- 45 min
- Issued by
- NWS State College, PA
- Area
- Whole counties
County Huntingdon County, PA
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 2.4 hours before the alert went out and 171 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
- 957 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 757 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 7 m²/s²
- 0-3 km storm-relative helicity
- 48 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 050224 RRA SVRCTP PAC061-050310- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE STATE COLLEGE PA 1025 PM EDT MON MAY 4 1998 THE NATIONAL WEATHER SERVICE IN STATE COLLEGE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN HUNTINGDON COUNTY IN SOUTH CENTRAL PENNSYLVANIA * UNTIL 1110 PM EDT * THE STORM WILL PASS NEAR THE FOLLOWING LOCATIONS... DUDLEY BY 1020 PM EDT ROTH ROCK STATE FOREST BY 1040 PM EDT * AT 1021 PM EDT... STATE COLLEGE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 15 MILES NORTHWEST OF SHIPPENSBURG OR 4 MILES SOUTHEAST OF DUDLEY MOVING NORTH AT 10 MPH. DAMAGING WINDS AND HEAVY RAIN ARE :LIKELY. GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS! THIS SLOW MOVING THUNDERSTORM WILL ALSO PRODUCE TORRENTIAL RAINS AND MAY CAUSE PONDING OF WATER ON ROADWAYS. JUNG
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 4, 9:00 PM EDT, 1 hour 25 minutes earlier.
Area forecast discussion, May 4, 9:00 PM EDT, 1 hour 25 minutes before
CENTRAL PENNSYLVANIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE STATE COLLEGE PA 900 PM EDT MON MAY 4 1998 ...SUGGESTIONS... PHL... ZONES ALREADY OUT I SEE. MY ONLY REAL SUGGESTION WAS TO RAISE POPS IN LOWER SUSQ TO LIKELY...WHICH I SEE WAS DONE. PIT... ZONES LOOK GOOD...EXCEPT TWEAKING WORDING REMOVING EVENING. ...DISCUSSION... ANOTHER NIGHT OF SHOWERS AND THUNDERSTORMS FOR THE CWA AS THE UPPER LOW CONTINUES TO MAKE SLOW PROGRESS TOWARD THE REGION. SOUTHERLY WIND FLOW LESS THAN 20 KTS HAS RESULTED IN SHOWERS AND STORMS BEING SLOW MOVERS. NO FLOODING YET TO REPORT HOWEVER. IFLOWS GAGES OVER CAMBRIA CO SHOW THAT RADAR ESTIMATES MAY BE HIGH...PROBABLY BEING CONTAMINATED BY SMALL HAIL. TONIGHTS FORECAST AGAIN HINGES ON TIMING OF SPOKES OF ENERGY ROTATING THROUGH THE REGION...AND HOW MUCH PCPN WILL BE GENERATED BY THEM. MODEL SOUNDINGS DO NOT SHOW MUCH STABILIZATION OVERNIGHT AS UPPER LEVELS REMAIN COLD WITH THE 500 LOW MOVING IN. THERE WILL ALSO BE A WEAK UPPER SHORTWAVE ROTATING THROUGH FROM THE SOUTH TOWARD 06Z. MODELS WOULD SUGGEST THAT THE CONCENTRATION OF PCPN WILL BE ACROSS THE SOUTHEAST ZONES TONIGHT...POSSIBLY EXTENDING INTO SOUTH CENTRAL MTS. WOULD CONTINUE CHC POPS FOR ALL AREAS EXCEPT THE LAURELS AND 25/26/27/28/34/35/36 BREAKOUT WHERE LIKELY POPS WOULD BE IN STORE... ESPECIALLY WITH THE APPROACHING SHORTWAVE. WOULD ALSO BUMP POPS UP TO LIKELY IN THE LOWER SUSQ FOR THE OVERNIGHT AS ACTIVITY FROM EASTERN VA SKIRTS AREA. ALTHOUGH LTG ACTIVITY WEAKENING SLOWLY WITH TIME TONIGHT...WITH OVERNIGHT LI/S REMAINING IN THE -2 RANGE...CAN NOT TOTALLY RULE OUT ADDITIONAL ISOLATED TSRA. WOULD THEREFORE KEEP THE MENTION OF THUNDER IN THE FORECAST OVERNIGHT FOR ALL ZONES EXCEPT MAYBE NORTHEAST. JUNG
The office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 5, 6:15 PM EDT | Flash Flood Warning | CTP | York | 4 hr |
| May 5, 6:43 PM EDT | Severe Thunderstorm Warning | CTP | Cambria | 47 min |
| May 5, 6:55 PM EDT | Severe Thunderstorm Warning | CTP | Somerset | 35 min |
| May 5, 7:16 PM EDT | Flash Flood Warning | CTP | Cambria, Somerset | 3 hr |
| May 5, 7:32 PM EDT | Flash Flood Warning | CTP | Dauphin | 3 hr |
| May 5, 7:40 PM EDT | Flash Flood Warning | CTP | Bedford | 50 min |
| May 5, 7:40 PM EDT | Severe Thunderstorm Warning | CTP | Bedford | 50 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.