Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 2, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Jan 18, 1999, 1:33 PM EST for Bedford County, Franklin County, Fulton County, Pennsylvania. It was in force for 77 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
- Jan 18, 1999, 1:33 PM EST (18:33 UTC)
- Expired
- Jan 18, 1999, 2:50 PM EST
- In force
- 77 min
- Issued by
- NWS State College, PA
- Area
- Whole counties
Counties Bedford County, PA, Franklin County, PA, Fulton County, PA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jan 18, 2:10 PM EST | Thunderstorm Wind | Waynesboro, PA | Windows were blown out of a house and trees were down. |
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
Washington/Dulle, VA (KIAD), launched 12:00Z, 6.6 hours before the alert went out and 127 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
- 408 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 601 m²/s²
- 0-3 km storm-relative helicity
- 602 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
999 WUUS01 KCTP 181834 RRA SVRCTP PAC009-013-027-055-057-061-087-181950- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE STATE COLLEGE PA 133 PM EST MON JAN 18 1999 THE NATIONAL WEATHER SERVICE IN STATE COLLEGE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRE COUNTY IN CENTRAL PENNSYLVANIA. EASTERN BLAIR COUNTY IN SOUTH CENTRAL PENNSYLVANIA. HUNTINGDON COUNTY IN SOUTH CENTRAL PENNSYLVANIA. MIFFLIN COUNTY IN CENTRAL PENNSYLVANIA. EASTERN BEDFORD COUNTY IN SOUTH CENTRAL PENNSYLVANIA. FULTON COUNTY IN SOUTH CENTRAL PENNSYLVANIA. FRANKLIN COUNTY IN SOUTH CENTRAL PENNSYLVANIA. * UNTIL 250 PM EST. * AT AT 130 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM CLEARFIELD TO BEDFORD...MOVING EAST AT 50 MPH. * THE LINE OF SEVERE THUNDERSTORMS WILL BE NEAR... PHILLIPSBURG AT 135 PM EST STATE COLLEGE AT 145 PM EST HUNTINGDON AT 145 PM EST MCCONNELLSBURG AT 155 PM EST THIS IS A DANGEROUS LINE OF STORMS STAY INDOORS AWAY FROM WINDOWS. .END/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 Jan 18, 10:30 AM EST, 3 hours 3 minutes earlier.
Area forecast discussion, Jan 18, 10:30 AM EST, 3 hours 3 minutes before
CENTRAL PENNSYLVANIA FORECAST DISCUSSION NATIONAL WEATHER SERVICE STATE COLLEGE PA 1030 AM EST MON JAN 18 1999 ...WORK ZONES OUT AT 930 AS PHLADMCTP... ...ZONES OUT BY 11 AM AS PHLZFPCTP... UPPER LO...SEEN IN THE SATELLITE IMAGERY NEAR SOUTHERN LK MICHIGAN...WILL PROGRESS NE TODAY. DARKENING IN WV IMAGERY OVER OHIO VALLEY REVEALING THE VORT MAX THAT IS PROGGED TO MOVE INTO PA LATE TODAY. REGIONAL RADAR LOOP SHOWING AN AREA OF MODERATE TO HEAVY RAIN DEVELOPING ACROSS EASTERN OHIO IN ADVANCE OF THE SFC COLD FRONT. RECENT LIGHTNING DATA SUGGESTING THAT THUNDER WILL BE CONFINED TO EXTREME SE PA...WHERE INFLUX OF LL MOISTURE IS THE GREATEST. WILL KEEP THE FFA GOING THROUGH THE AFTN BECAUSE MINOR FLOODING STILL SEEMS LIKELY AS PRE-FRONTAL RAIN BAND MOVES THROUGH THIS AFTN. IN FACT...SOME STREAMS IN LANCASTER CO ALREADY FLOODING IN RESPONSE TO RAINS OVERNIGHT. ALSO...FLASH FLOOD THREAT EXISTS AS A RESULT OF POSSIBLE ICE JAMS ALONG SMALLER RIVERS AND STREAMS. HAVE ADDED THE CHANCE OF SNOW SHOWERS EXTREME NW FOR LATE THIS AFTN GIVEN LATEST ETA SOUNDINGS. .CTP...FLASH FLOOD WATCH THROUGH THIS AFTERNOON SOUTHERN HALF OF CENTRAL PA. WILL RE-ISSUE PHLSPSCTP FOR CONVECTIVE OUTLOOK IN THE LOWER SUSQ VALL. FITZGERALD
In the hours before
Special weather statement, Jan 18, 11:06 AM EST, 2 hours 27 minutes before
PAZ036-056-057-059-063>066-182115- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE STATE COLLEGE PA 1106 AM EST MON JAN 18 1999 ...SLIGHT RISK OF DAMAGING THUNDERSTORM WINDS THIS AFTERNOON... A COLD FRONT WILL SWEEP EAST ACROSS PENNSYLVANIA THIS AFTERNOON. AS THE FRONT MOVES THROUGH...IT WILL BRING A PERIOD OF RAIN...ALONG WITH WIDELY SCATTERED THUNDERSTORMS. WINDS JUST ABOVE THE SURFACE ARE VERY STRONG FROM THE SOUTHWEST. THEREFORE...ANY THUNDERSTORMS THAT FORM WILL BRIEFLY BE CAPABLE OF CAUSING THESE STRONG WINDS TO DECEND TO THE GROUND. SOME GUSTS WILL LIKELY EXCEED 40 MPH AND COULD BE POTENTIALLY DAMAGING. ANYONE WITH PROPERTY CONCERNS THAT ARE VULNERABLE TO HIGH WINDS SHOULD MONITOR THIS SITUATION CLOSELY. .END/ YOU CAN FIND INFORMATION ON THE FLOOD POTENTIAL WITH THIS SYSTEM IN THE FLASH FLOOD WATCH (PHLFFACTP) ISSUED THIS MORNING. ADDITIONAL WEATHER INFORMATION FOR CENTRAL PENNSYLVANIA CAN BE FOUND AT THE STATE COLLEGE NATIONAL WEATHER SERVICE WORLD WIDE WEB SITE. THE ADDRESS IS: HTTP://BOOKEND.MET.PSU.EDU (ALL LOWER CASE) FITZGERALD
The office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 18, 10:33 AM EST | Flash Flood Warning | CTP | Lancaster | 3 hr |
| Jan 18, 1:25 PM EST | Flash Flood Warning | CTP | Lancaster | 4 hr |
| Jan 18, 1:33 PM EST | Severe Thunderstorm Warning | CTP | Centre, Huntingdon, Mifflin | 77 min |
| Jan 18, 1:33 PM EST | Severe Thunderstorm Warning | CTP | Blair | 77 min |
| Jan 18, 2:19 PM EST | Severe Thunderstorm Warning | CTP | Cumberland, Dauphin, Juniata, Northumberland, Perry, Snyder | 61 min |
| Jan 18, 2:19 PM EST | Severe Thunderstorm Warning | CTP | Adams, York | 61 min |
| Jan 18, 2:19 PM EST | Severe Thunderstorm Warning | CTP | Union | 61 min |
| Jan 18, 2:28 PM EST | Severe Thunderstorm Warning | CTP | Lycoming | 47 min |
| Jan 18, 3:03 PM EST | Flash Flood Warning | CTP | Columbia, Lycoming, Montour, Northumberland, Sullivan | 4 hr |
| Jan 18, 3:03 PM EST | Flash Flood Warning | CTP | Lebanon, Schuylkill | 4 hr |
| Jan 18, 4:05 PM EST | Flash Flood Warning | CTP | Lancaster | 3 hr |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 1999Every severe thunderstorm warning 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.