Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 133, NWS Pittsburgh, PA

June 21, 2000Fayette County, Pennsylvania; Preston County, West Virginia

NWS Pittsburgh, PA issued this severe thunderstorm warning at Jun 21, 2000, 5:07 PM EDT for Fayette County, Pennsylvania; Preston County, West Virginia. It was in force for 53 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: Jun 21, 2000, 5:07 PM EDT (21:07 UTC)
Expired: Jun 21, 2000, 6:00 PM EDT
In force: 53 min
Issued by: NWS Pittsburgh, PA
Area: Whole counties

Counties Fayette County, PA, Preston County, WV

The radar

The Pittsburgh radar (KPBZ), 105 km from the middle of the area, began a volume at 21:09 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

Time	Report	Where	Remark
Jun 21, 5:20 PM EDT	Thunderstorm Wind	Grindstone, PA	Thunderstorm winds downed a large tree.

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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 21, 2:00 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 9.1 hours before the alert went out and 88 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 553 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 646 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 204 m²/s²
0-3 km storm-relative helicity: 205 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KPBZ 212112 COR
SVRPIT
PAC051-WVC077-212200-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING...CORRECTED FOR RADAR TIME
NATIONAL WEATHER SERVICE PITTSBURGH PA
507 PM EDT WED JUN 21 2000

THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  FAYETTE COUNTY IN PENNSYLVANIA
  PRESTON COUNTY IN WEST VIRGINIA

* UNTIL 600 PM EDT

* AT 510 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM NEAR BRUCETON MILLS...MOVING EAST
  AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE...
OVER RURAL SOUTHEASTERN FAYETTE COUNTY AND NORTHERN 
PRESTON COUNTY AROUND 520 PM

<<CALL TO ACTION>>SEVERE THUNDERSTORMS PRODUCE WINDS IN EXCESS OF 58
MILES AN HOUR AND LARGE HAIL GREATER THAN THREE QUARTERS OF AN INCH.

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 Pittsburgh, PA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 21, 2:55 PM EDT, 2 hours 12 minutes earlier.

Area forecast discussion, Jun 21, 2:55 PM EDT, 2 hours 12 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PITTSBURGH PA
255 PM EDT WED JUN 21 2000

LN OF TSTMS CURRENTLY ALG BFD-PIT-PKB LN WL MOV THRU RMNDR CWA DURG
NEXT 2-4 HR. WL PLAY UP POTENTIAL FOR WIND GUSTS IN SVR TSTM WATCH
AREA. SFC DEWPTS STILL HI BHD LN OF TSTMS ALL THE WAY BACK INTO OH AND
INDIANA. MOST TSTMS SHUD DIE OUT BY SUNSET...BUT WL KEEP SML CHC POPS
FOR RSHWRS OVRNGT.

UPR TROF WL PUSH EWD ACRS RGN THU WITH STG COOLING ALF. CAP IS EVIDENT
ON MDL SOUNDINGS AT 18Z THU ARND 650 MB...BUT WITH SFC TEMPS CLIMBING
INTO LWR 80S...CUD STILL POP SCT SHWRS OR TSTMS DURG AFTN.

WENT DRY FOR THU NGT INTO FRI AS SFC HI BLDS IN. PROBABLY WL SEE SOME
SCT CU FRI..BUT WL GO WITH OPTIMISTIC MOSNY.

FCSTID = 14
PIT   64  82  60  82 /  40  30  10   5
MGW   64  82  60  82 /  30  30  10   5

.PBZ...
MD...NONE.
OH...NONE.
PA...SEVERE THUNDERSTORM WATCH UNTIL 700 PM FOR ZONES
PAZ008>009...PAZ014>016(...PAZ021>023...PAZ029>032.

WV...NONE.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 3:06 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny	24 min
Jun 21, 3:54 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana, Westmoreland	66 min
Jun 21, 4:58 PM EDT	Severe Thunderstorm Warning	PBZ	Westmoreland	47 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2000 Severe Thunderstorm Warnings in West Virginia, 2000 Every 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.