Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 199, NWS State College, PA

August 2, 2000Potter County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Aug 2, 2000, 4:01 PM EDT for Potter County, Pennsylvania. It was in force for 74 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
Aug 2, 2000, 4:01 PM EDT (20:01 UTC)
Expired
Aug 2, 2000, 5:15 PM EDT
In force
74 min
Issued by
NWS State College, PA
Area
Whole counties

County Potter County, PA

The radar

The State College radar (KCCX), 92 km from the middle of the area, began a volume at 20:02 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.

What was reported inside it

TimeReportWhereRemark
Aug 2, 4:43 PM EDTThunderstorm WindShinglehouse, PATrees were down across a road south of Shinglehouse.

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

Pittsburgh, PA (KPIT), launched 12:00Z, 8.0 hours before the alert went out and 237 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, Pittsburgh, PA at 12:00Z on 2000-08-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 450 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, Pittsburgh, PA at 12:00Z on 2000-08-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 93 square meters per square second.19395878Sfc1 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
450 J/kg
Mixed-layer CIN
-19 J/kg
Mixed-layer LCL
685 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
93 m²/s²
0-3 km storm-relative helicity
81 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.2

Open this sounding in Storm Lab

The text

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

536 
WUUS51 KCTP 022011
SVRCTP
PAC105-022115-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
401 PM EDT WED AUG 2 2000

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  POTTER COUNTY.

* UNTIL 515 PM EDT.

* AT 357 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM 7 MILES WEST OF SHINGLEHOUSE TO
  12 MILES WEST OF AUSTIN...MOVING EAST AT 30 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  SHINGLEHOUSE AT 410 PM.
  AUSTIN AT 420 PM.
  COUDERSPORT AND OSWAYO AT 425 PM.
  ULYSSES AT 450 PM.
  GALETON AT 500 PM.

REMEMBER...SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR
NO ADVANCED WARNING.

THIS IS A DANGEROUS STORM WITH DAMAGING WINDS AND LARGE HAIL. STAY
INDOORS AWAY FROM WINDOWS.

$$

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 2, 1:00 PM EDT, 3 hours 1 minute earlier.

Area forecast discussion, Aug 2, 1:00 PM EDT, 3 hours 1 minute before
CENTRAL PENNSYLVANIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
100 PM EDT WED AUG 02 2000

SHORT UPD COMING NOW RDR BACK IN SRVCE AS OF 1630Z...AND JUST IN
TIME...TOO BOX FOR NRN TIER IN EFFECT BY PRESS TIME. SFC FRONT
ROUGHLY FM APN-MKE-RFD NOW. TEXTBOOK OF AN MCV TRANSITIONING TO SVR
WX MAKER (MIKE FRITSCH TOLD ME THESE THINGS HAPPEN).  JUICE REAMINS
IN PLACE W/ MID 60S TO NR 70 DWPTS ACRS FA.

FNT ADVERTISED EARLIER WL MAKE AN APPEARANCE TOMORROW. MORE TEXTBOOK
STUFF COMING ALONG...AS NEAT JET STREAK INTERACTION LIKELY DURING
MIDDLE OF DAY TOM...SO TALL CLDS TO GET JUST THAT MUCH MORE LIFT
ALONG ALRDY POTENT FNTL BOUNDARY. BUT...THINGS SHUD BEGIN TO CALM
DOWN NICELY AFT SSET ON THURS...W/PASSAGE BRINGING DRIER HI PRES.
FRI MAY END UP BEING A REALLY NICE DAY...AND WL THEREFORE CUT POPS
BACK TO ONLY FAR NRN TIER WHERE COLDEST AIR WL LIE.

XTNDD: MRF MUCHO CONSISTENT. ECMWF DIFFERS SLIGHTLY WITH STRENGTH OF
NEXT SYSTEM...BUT OVERALL GOOD AGREEMENT. NICE SAT...NOT TERRIBLE
SUNDAY EITHER  MON BRINGS ANOTHER FRONT - TWO IN THE SAME FORECAST
- IS THAT POSSIBLE??  TEMPS...WL ROLL W/GUID.

.CTP...SVR WATCH 638 THRU 22Z FOR NWRN CWA.

DANGELO

In the hours before

Special weather statement, Aug 2, 12:25 PM EDT, 3 hours 36 minutes before
PAZ004>006-010>012-017-018-037-041-042-022222-

SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1225 PM EDT WED AUG 2 2000

...SEVERE THUNDERSTORMS ARE POSSIBLE ACROSS THE NORTHERN MOUNTAINS
OF PENNSYLVANIA THIS AFTERNOON AND EVENING...

WARM AND VERY HUMID AIR IN PLACE ACROSS THE REGION WILL HELP TO
INTENSIFY AN AREA OF THUNDERSTORMS...WHICH WERE MOVING ACROSS
CENTRAL LAKE ERIE AND NORTHEASTERN OHIO EARLY THIS AFTERNOON.

THE THUNDERSTORMS MAY REACH SEVERE LIMITS AS THEY MOVE INTO THE
NORTHWEST MOUNTAINS NEAR WARREN AND BRADFORD BETWEEN 2 AND 3 PM THIS
AFTERNOON. STRONG WIND GUSTS AROUND 60 MPH ALONG WITH HAIL AND
FREQUENT CLOUD TO GROUND LIGHTNING WILL BE THE MAIN THREAT.

THE THREAT FOR THE SEVERE WEATHER FURTHER EAST WILL OCCUR LATE THIS
AFTERNOON AND THIS EVENING.

THE POTENTIAL ALSO EXISTS FOR LOCALLY HEAVY DOWNPOURS FROM REPEAT
THUNDERSTORMS. THE RAIN MAY BE HEAVY ENOUGH OVER A SHORT PERIOD OF
TIME TO CAUSE FLOODING. PLACES THAT RECEIVED HEAVY RAINS DURING THE
LAST FEW DAYS WILL BE MOST SUSCEPTIBLE TO FLOODING.

LAMBERT/DANGELO
Special weather statement, Aug 2, 1:00 PM EDT, 3 hours 1 minute before
PAZ004>006-009-010-022200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
100 PM EDT WED AUG 2 2000

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 6 PM EDT FOR THE
NORTHWEST AND NORTH CENTRAL MOUNTAINS OF PENNSYLVANIA...

COUNTIES INCLUDED IN THE SEVERE THUNDERSTORM WATCH ARE:

CAMERON...ELK...MCKEAN...POTTER AND WARREN.

SEVERE THUNDERSTORMS MOVING INTO EXTREME NORTHWEST PENNSYLVANIA WILL
LIKELY MAINTAIN THEIR INTENSITY AS THEY ENTER THE NORTHWEST
MOUNTAINS OF PENNSYLVANIA BETWEEN 2 AND 3 PM.

THE POTENTIAL ALSO EXISTS FOR LOCALLY HEAVY DOWNPOURS FROM REPEAT
THUNDERSTORMS. THE RAIN MAY BE HEAVY ENOUGH OVER A SHORT PERIOD OF
TIME TO CAUSE FLOODING. PLACES THAT RECEIVED HEAVY RAINS DURING THE
LAST FEW DAYS WILL BE MOST SUSCEPTIBLE TO FLOODING.

A SEVERE THUNDERSTORM WATCH MEANS THAT SEVERE THUNDERSTORMS
CONTAINING WINDS GUSTS OVER 58 MPH...OR HAIL OF THREE QUARTERS OF AN
INCH IN DIAMETER OR LARGER...ARE POSSIBLE.

LAMBERT/DANGELO
Local storm report, Aug 2, 3:21 PM EDT, 40 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE, PA
321 PM EDT WED AUG 2 2000

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0230 PM    YOUNGSVILLE               PA   60 MPH TSTM WIND GUST
08/02/00   WARREN

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 2, 1:51 PM EDTSevere Thunderstorm WarningCTPWarren69 min
Aug 2, 3:02 PM EDTSevere Thunderstorm WarningCTPMcKean, Warren58 min
Aug 2, 4:07 PM EDTSevere Thunderstorm WarningCTPMcKean38 min
Aug 2, 4:38 PM EDTSevere Thunderstorm WarningCTPColumbia67 min
Aug 2, 4:51 PM EDTSevere Thunderstorm WarningCTPClearfield54 min
Aug 2, 5:14 PM EDTFlash Flood WarningCTPColumbia3 hr
Aug 2, 5:37 PM EDTFlash Flood WarningCTPClearfield3 hr
Aug 2, 6:20 PM EDTSevere Thunderstorm WarningCTPClinton25 min
Aug 2, 6:41 PM EDTFlash Flood WarningCTPClinton3 hr
Aug 2, 6:44 PM EDTSevere Thunderstorm WarningCTPCentre61 min
Aug 2, 7:02 PM EDTSevere Thunderstorm WarningCTPLycoming58 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.