Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 216, NWS State College, PA

August 27, 2000Adams County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Aug 27, 2000, 5:28 PM EDT for Adams County, Pennsylvania. It was in force for 92 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
Aug 27, 2000, 5:28 PM EDT (21:28 UTC)
Expired
Aug 27, 2000, 7:00 PM EDT
In force
92 min
Issued by
NWS State College, PA
Area
Whole counties

County Adams County, PA

The radar

The Sterling radar (KLWX), 102 km from the middle of the area, began a volume at 21:29 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, 9.5 hours before the alert went out and 104 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.

Skew-T log-pSkew-T log-p diagram, Washington/Dulle, VA at 12:00Z on 2000-08-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 440 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 12:00Z on 2000-08-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
440 J/kg
Mixed-layer CIN
-128 J/kg
Mixed-layer LCL
957 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
39 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS51 KCTP 272137
SVRCTP
PAC001-272300-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
528 PM EDT SUN AUG 27 2000

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ADAMS COUNTY.

* UNTIL 700 PM EDT.

* AT 522 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM 17 MILES NORTHWEST OF FAIRFIELD
  TO 8 MILES SOUTHWEST OF LITTLESTOWN...MOVING EAST AT 15 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  GETTYSBURG AND LITTLESTOWN AT 600 PM.
  BONNEAUVILLE AT 610 PM.
  ARENDTSVILLE AT 615 PM.
  BIGLERVILLE AND MCSHERRYSTOWN AT 625 PM.
  BENDERSVILLE AND NEW OXFORD AT 635 PM.
  YORK SPRINGS AT 700 PM.

THESE STORMS HAVE ALREADY PRODUCED WIND DAMAGE OVER SOUTHERN ADAMS
COUNTY. STAY INDOORS AWAY FROM WINDOWS. SEVERE THUNDERSTORMS CAN
OCCASIONALLY PRODUCE TORNADOES WITH LITTLE AD?VANCE WARNING.

$$

FITZGERALD

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 Aug 27, 3:00 PM EDT, 2 hours 28 minutes earlier.

Area forecast discussion, Aug 27, 3:00 PM EDT, 2 hours 28 minutes before
CENTRAL PENNSYLVANIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
300 PM EDT SUN AUG 27 2000

POTENT SHRTWV/UPR CENTER OVER OH IS MAKING SLOW PROGRESS SEWD THIS
AFTN. NARROW BAND OF SHOWERS AND SOME EMBEDDED THUNDERSTORMS MAKING
ITS WAY ACROSS WRN PART OF OUR CWA ATTM. THE BAND IS MVNG INTO PLUME
OF HIGHER SFC DEWPOINTS OVER SCENTRAL PA...HELPING TSTMS TO CONTINUE
FOR THE TIME BEING. MOVEMENT AND COVERAGE OF THE SHWRS/TSTMS INTO
THIS EVENING WILL CONTINUE TO BE THE MAIN FCST PROBLEM. THUS WILL
DELAY ZONE ISSUANCE UNTIL JUST BEFORE 4PM.

GRADUAL CLEARING OF CLOUD COVER FROM NW TO SE EXPECTED TONIGHT WITH
WIDESPREAD FOG DEVELOPMENT ALSO EXPECTED WITH THE CLEARING LATE
TONIGHT WITH FOG HANGING AROUND THROUGH MON AM.

AS UPR LOW PROCEEDS TO VA AND LOW PRESSURE DEVELOPS ALONG THE
EASTER SEABOARD...EASTERLY FLOW WILL KEEP SOME CLOUDS OVER ERN CWA
MON MORN.

EXTENDED...
WARMING TREND SHAPIYNG UP IN THE EXTENDED AS UPR RIDGE BUILDS EAST
INTO THE MIDATLC. CHNC OF SHWR/TSTM WED INTO EARLY THUR FOR THE WEST
AS NEXT SYSTEM APPROACHES FROM THE NW.

.CTP...NONE.

GARTNER

The office that day

Everything else NWS State College, PA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 27, 1:43 PM EDTSevere Thunderstorm WarningCTPSomerset62 min
Aug 27, 2:18 PM EDTSevere Thunderstorm WarningCTPCambria57 min
Aug 27, 6:27 PM EDTFlash Flood WarningCTPAdams3 hr
Aug 27, 7:48 PM EDTFlash Flood WarningCTPCumberland117 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2000Every severe thunderstorm warning in 2000

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.