Alert archive / Ohio / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 181, NWS Pittsburgh, PA

July 4, 2002Jefferson County, Ohio

NWS Pittsburgh, PA issued this severe thunderstorm warning at Jul 4, 2002, 3:12 PM EDT for Jefferson County, Ohio. It was in force for 63 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: Jul 4, 2002, 3:12 PM EDT (19:12 UTC)
Expired: Jul 4, 2002, 4:15 PM EDT
In force: 63 min
Issued by: NWS Pittsburgh, PA
Area: Whole counties

County Jefferson County, OH

The radar

The Pittsburgh radar (KPBZ), 49 km from the middle of the area, began a volume at 19:15 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
Jul 4, 3:25 PM EDT	Thunderstorm Wind	Stratton, OH	Thunderstorm winds downed several trees.

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, 7.2 hours before the alert went out and 56 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: 1401 J/kg
Mixed-layer CIN: -60 J/kg
Mixed-layer LCL: 1331 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: -46 m²/s²
0-3 km storm-relative helicity: -44 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 Jul 4, 2:20 PM EDT, 52 minutes earlier.

Area forecast discussion, Jul 4, 2:20 PM EDT, 52 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PITTSBURGH PA
220 PM EDT THU JUL 4 2002

MSAS SFC ANAL SHOWS LO-LVL WIND CONVERGENT BOUNDARY SET UP ACRS SWRN
PA...WESTMORELAND CTY...EXTNDG TO THE SW ACRS EAST-CNTRL OH TWRDS
ZZV.  TSTMS CURRENTLY FIRING UP ALONG THIS BOUNDARY.  WITH PLENTY OF
MOISTURE AND INSTABILITY...LI/S TO -8 AND SBCAPES OVR 3000...LOOK
FOR MOST ACTIVITY TO BE FOCUSED ON THIS BOUNDARY FOR THE NEXT FEW
HOURS.

FARTHER NORTH...MAIN FRONT SLOWLY SAGGING SOUTH ACRS LK ERI AND INTO
NWRN CORNER OF PA.  THIS FRONT WILL LIKELY CAUSE ANOTHER AREA OF
FOCUS AS IT DROPS SOUTH INTO CWA FOR LATE PM/EVE HOURS...ESP IF IT
INTERACTS WITH ANY LINGERING OUTFLOW BOUNDARIES.  AS USUALLY HAPPENS
IN THE SUMMER...THIS SOUTHWARD-BOUND FRONT IS MOVING SLOWER THAN
FCSTD BY MODELS.  WL KEEP EVENING MENTION OF SHRA/TSRA IN FOR NRN
HALF OF ZONES...AND WILL KEEP IN THRU NIGHT FOR SOUTH.  WL INCLUDE
MENTION OF HVY RAIN/STG WINDS IN ZONES FOR SRN HALF OF CWA WHERE
THIS LO-LVL BOUNDARY EXISTS.

FOR RMDR OF FCST...CLEAR SAILING FOR THIS WEEKEND AS FRONT MOVES
SOUTH OF CWA AND COOLER...DRIER AIR SETTLES IN.  FOR TEMPS...WL STAY
CLOSE TO NGM/AVN MOS THRU SAT.  AS FAR AS NEXT CHC OF PRECIP
GOES...12Z AVN DIFFERED QUITE A BIT FROM 00Z MRF WITH TIMING.  00Z
MRF BROUGHT NEXT SYSTEM IN FOR MONDAY...12Z AVN BACKS THIS OFF TIL
TUES.  WL BUY INTO THIS SOLN...DELAYING NEXT MENTION OF PRECIP TIL
TUES.

QUESTION FOR EXTNDD IS WL THIS FRONT CLEAR THE AREA...BRINGING DRY
CONDS BACK FOR WED/THURS.  FOR NOW WL KEEP NRN HALF DRY ON WED AND
KEEP SHRA/TSRA IN SOUTH...ANTICIPATING THIS FRONTAL BOUNDARY WILL
STALL A BIT.  WL KEEP AREA DRY ON THURS FOR THIS PKG.

STRAGER

.PBZ...
MD...NONE.
OH...NONE.
PA...NONE.
WV...NONE.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 1:27 PM EDT	Severe Thunderstorm Warning	PBZ	Westmoreland	63 min
Jul 4, 3:59 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny	61 min
Jul 4, 4:10 PM EDT	Severe Thunderstorm Warning	PBZ	Westmoreland	65 min
Jul 4, 5:22 PM EDT	Severe Thunderstorm Warning	PBZ	Westmoreland	23 min
Jul 4, 3:30 PM EDT	Severe Thunderstorm Warning	PBZ	Brooke, Hancock	45 min

Nearby

Severe Thunderstorm Warnings in Ohio, 2002 Every severe thunderstorm warning in 2002

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.