Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 202, NWS State College, PA

August 2, 2000Clearfield County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Aug 2, 2000, 4:51 PM EDT for Clearfield County, Pennsylvania. It was in force for 54 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, 4:51 PM EDT (20:51 UTC)
Expired
Aug 2, 2000, 5:45 PM EDT
In force
54 min
Issued by
NWS State College, PA
Area
Whole counties

County Clearfield County, PA

What was reported inside it

TimeReportWhereRemark
Aug 2, 5:40 PM EDTThunderstorm WindDu Bois, PAA few trees were down in Dubois.

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, 8.9 hours before the alert went out and 152 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.

171 
WUUS51 KCTP 022051
SVRCTP
PAC033-022145-

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

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CLEARFIELD COUNTY.

* UNTIL 545 PM EDT.

* AT 448 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 3 MILES SOUTH OF SANDY...OR 4 MILES SOUTHWEST
  OF DUBOIS...MOVING NORTHEAST AT 10 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  SANDY AT 500 PM.
  DUBOIS AT 510 PM.
  TREASURE LAKE AT 530 PM.

THIS IS A DANGEROUS STORM. STAY INDOORS AWAY FROM WINDOWS. SEVERE
THUNDERSTORMS CONTAIN DAMAGING WINDS 58 MPH OR STRONGER OR HAIL THREE
QUARTERS OF AN INCH OR LARGER.

$$

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 51 minutes earlier.

Area forecast discussion, Aug 2, 1:00 PM EDT, 3 hours 51 minutes 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, 4 hours 26 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 51 minutes 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, 1 hour 30 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
Local storm report, Aug 2, 4:35 PM EDT, 16 minutes before
PHLWRKLSR
TTAAOO KCTP 022034

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

0340 PM    KEETING TWP               PA   WIND DAMAGE
08/02/00   MCKEAN                         SEVERAL TREES DOWN ALONG
                                          RT 646

0345 PM    SMITH BORO                PA   WIND DAMAGE
08/02/00   MCKEAN                         TREES DOWN ALONG OLD RT 6

0345 PM    OTTO TWP                  PA   WIND DAMAGE
08/02/00   MCKEAN                         POWER LINES DOWN

DJO

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, 4:01 PM EDTSevere Thunderstorm WarningCTPPotter74 min
Aug 2, 4:07 PM EDTSevere Thunderstorm WarningCTPMcKean38 min
Aug 2, 4:38 PM EDTSevere Thunderstorm WarningCTPColumbia67 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.