Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 7, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Mar 9, 1998, 5:47 PM EST for York County, Pennsylvania. It was in force for 48 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
- Mar 9, 1998, 5:47 PM EST (22:47 UTC)
- Expired
- Mar 9, 1998, 6:35 PM EST
- In force
- 48 min
- Issued by
- NWS State College, PA
- Area
- Whole counties
County York County, PA
The radar
The Sterling radar (KLWX), 124 km from the middle of the area, began a volume at 22:51 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
Washington/Dulle, VA (KIAD), launched 12:00Z, 10.8 hours before the alert went out and 122 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
- 534 m above ground
- 0-6 km bulk shear
- 76 kt
- 0-1 km storm-relative helicity
- 529 m²/s²
- 0-3 km storm-relative helicity
- 444 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
093 WUUS01 KCTP 092246 RRA SVRCTP PAC133-092335- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE STATE COLLEGE PA 547 PM EST MON MAR 9 1998 THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 635 PM EST FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTH CENTRAL PENNSYLVANIA ...YORK COUNTY NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM MOVE INTO SOUTHERN YORK COUNTY JUST TO THE EAST OF HANOVER...NEAR THE TOWN OF LOGANVILLE. THE STORM WAS MOVING TO THE NORTH NORTHEAST AT 55 MPH. THE STORM WILL AFFECT THE YORK AREA BY 555 PM AND MANCHESTER AROUND 605 PM EST. MARBLE SIZE HAIL HAS BEEN REPORTED FROM THIS STORM IN CARROLL COUNTY MARYLAND. 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. DONT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. LAMBERT/ONDREJIK &
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 Mar 9, 2:00 PM EST, 3 hours 47 minutes earlier.
Area forecast discussion, Mar 9, 2:00 PM EST, 3 hours 47 minutes before
CENTRAL PENNSYLVANIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE STATE COLLEGE PA 145 PM EST MON FEB 09 1998 ...SUGGESTIONS... PIT/PHL...SVR THREAT EAST OF MY CWA. PIT...LK EFFECT SNOW ADV FOR WARREN AND MCKEAN COUNTIES AND INCLUDE THE LAUREL HIGHLANDS IN SNOW ADV FOR LATE TONIGHT (AFT MIDNIGHT) THRU TUESDAY. ...DISCUSSION... RADAR SHOWS BAND OF SHOWERS MOVING NE OUT OF CWA. ACTIVITY WAS ASSOCIATED WITH WINDSHIFT/TROF. STABLE...MILD...DRY AIR HAS BUILD IN BEHIND THIS FEATURE. TO OUR WEST...SHARP COLD FRONT WITH ARCTIC AIR APPROACHING KCLE ATTM. THIS FRONT WILL BRING RENEWED SHOWER ACTIVITY AND BREEZY CONDITIONS FROM W TO E ACROSS FCST/A THIS EVE. AFTER 06Z...SFC-7H WINDS SOMEWHAT ALIGN FROM THE NW ALLOWING FOR THE LK EFFECT MACHINE TO GET INTO GEAR (MULTIBAND). IN ADDITION...8H TEMPS WILL CONTINUE TO FALL INTO TUESDAY NIGHT WITH 8H -22C READINGS SLIDING SE. SUBSIDENCE INVERSION ARND 830MB AND DECENT WIND FIELD THRU MIDDAY TUESDAY SHOULD BRING ADV SNOW AMTS TO LAUREL HIGHLANDS AND PORTIONS OF THE NW MTNS. TUESDAY WILL BE A CLOUDY COLD BREEZY DAY WITH SNOWSHOWERS CONTINUING OVER THE N MTNS AND LAUREL HIGHLANDS. LK EFFECT WILL LIKELY BE ENHANCED WED EVE AS ANOTHER SHRTWV SLIDES SE OUT OF CANADA. WINTHER
The office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 9, 5:57 PM EST | Severe Thunderstorm Warning | CTP | Lancaster, Lebanon | 43 min |
| Mar 9, 6:41 PM EST | Severe Thunderstorm Warning | CTP | Lancaster | 59 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.