Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 35, NWS Pittsburgh, PA

April 20, 2011Armstrong County, Butler County, Clarion County, Pennsylvania

NWS Pittsburgh, PA issued this severe thunderstorm warning at Apr 20, 2011, 4:37 AM EDT for Armstrong County, Butler County, Clarion County, Pennsylvania. It was in force for 38 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 20, 2011, 4:37 AM EDT (08:37 UTC)
Expired: Apr 20, 2011, 5:15 AM EDT
In force: 38 min
Issued by: NWS Pittsburgh, PA
Area: Storm-based polygon

Counties Armstrong County, PA, Butler County, PA, Clarion County, PA

The radar

The Pittsburgh radar (KPBZ), 79 km from the middle of the area, began a volume at 08:37 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
Apr 20, 4:45 AM EDT	TSTM WND DMG	Butler, PA	MULTIPLE TREES AND POWERLINES DOWN
Apr 20, 4:45 AM EDT	TSTM WND DMG	Connoquenessing, PA	TREES AND POWERLINES DOWN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 2 storm reports to this severe thunderstorm warning; the first came 8 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

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

Issued	Product	Office	Lasted
Apr 20, 2:22 AM EDT	Severe Thunderstorm Watch	SPC	3 hr

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 00:00Z, 8.6 hours before the alert went out and 87 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: 2 J/kg
Mixed-layer CIN: -392 J/kg
Mixed-layer LCL: 1017 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 234 m²/s²
0-3 km storm-relative helicity: 422 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.5

Open this sounding in Storm Lab

The text

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

158 
WUUS51 KPBZ 200837
SVRPBZ
PAC005-019-031-200915-
/O.NEW.KPBZ.SV.W.0035.110420T0837Z-110420T0915Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PITTSBURGH PA
437 AM EDT WED APR 20 2011

THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN ARMSTRONG COUNTY IN WEST CENTRAL PENNSYLVANIA...
  BUTLER COUNTY IN WEST CENTRAL PENNSYLVANIA...
  SOUTHERN CLARION COUNTY IN WEST CENTRAL PENNSYLVANIA...

* UNTIL 515 AM EDT

* AT 432 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 6 MILES SOUTHEAST OF MORAINE
  STATE PARK...MOVING NORTHEAST AT 55 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO  
  MORAINE STATE PARK... BUTLER...             HOOKER...
  CHICORA...            BRADYS BEND...        EAST BRADY...
  RIMERSBURG...         KNOX...               LIMESTONE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR
DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD TO GROUND
LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY
INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL
WEATHER SERVICE BY CALLING TOLL FREE. 1-877-633-6772...WHEN YOU CAN
DO SO SAFELY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 AM EDT
WEDNESDAY MORNING FOR EAST CENTRAL OHIO AND WESTERN PENNSYLVANIA AND
NORTHERN WEST VIRGINIA.

&&

LAT...LON 4130 7954 4111 7929 4073 7997 4092 8012
      4118 7974 4117 7970 4118 7968 4123 7966
TIME...MOT...LOC 0838Z 235DEG 50KT 4091 7993

$$

3 follow-up statements

507 
WWUS51 KPBZ 200843 RRA
SVSPBZ

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
443 AM EDT WED APR 20 2011

PAC005-019-031-200915-
/O.CON.KPBZ.SV.W.0035.000000T0000Z-110420T0915Z/
ARMSTRONG PA-BUTLER PA-CLARION PA-
443 AM EDT WED APR 20 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 AM EDT
FOR CLARION...BUTLER AND ARMSTRONG COUNTIES...

AT 437 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR SMITHVILLE...MOVING NORTHEAST AT 50 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO  
  MORAINE STATE PARK... HOOKER...             CHICORA...
  BUTLER...             EAU CLAIRE...         BRADYS BEND...
  EAST BRADY...         RIMERSBURG...         KNOX...
  LIMESTONE...

LAT...LON 4130 7954 4111 7929 4073 7997 4092 8012
      4118 7974 4117 7970 4118 7968 4123 7966
TIME...MOT...LOC 0844Z 233DEG 52KT 4103 7977

$$

712 
WWUS51 KPBZ 200855
SVSPBZ

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
455 AM EDT WED APR 20 2011

PAC005-019-031-200915-
/O.CON.KPBZ.SV.W.0035.000000T0000Z-110420T0915Z/
ARMSTRONG PA-BUTLER PA-CLARION PA-
455 AM EDT WED APR 20 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 AM EDT
FOR CLARION...BUTLER AND ARMSTRONG COUNTIES...

AT 446 AM EDT...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF
PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.
 THIS STORM WAS LOCATED NEAR ELDORADO...MOVING NORTHEAST AT 50 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO  
  RIMERSBURG...         HOOKER...             EAU CLAIRE...
  EAST BRADY...         CHICORA...            BUTLER...
  BRADYS BEND...        KNOX...               LIMESTONE...

LAT...LON 4111 7929 4078 7988 4103 7996 4118 7975
      4117 7970 4118 7968 4123 7966 4129 7953
TIME...MOT...LOC 0855Z 232DEG 52KT 4117 7963

$$

907 
WWUS51 KPBZ 200902
SVSPBZ

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
502 AM EDT WED APR 20 2011

PAC005-019-200912-
/O.CAN.KPBZ.SV.W.0035.000000T0000Z-110420T0915Z/
ARMSTRONG PA-BUTLER PA-
502 AM EDT WED APR 20 2011

...THE SEVERE THUNDERSTORM WARNING FOR BUTLER AND ARMSTRONG COUNTIES
IS CANCELLED...

LAT...LON 4111 7929 4097 7954 4098 7958 4097 7962
      4099 7963 4099 7960 4100 7959 4101 7962
      4103 7960 4105 7967 4117 7969 4123 7963
      4129 7953
TIME...MOT...LOC 0902Z 230DEG 53KT 4125 7951

$$

PAC031-200915-
/O.CON.KPBZ.SV.W.0035.000000T0000Z-110420T0915Z/
CLARION PA-
502 AM EDT WED APR 20 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 AM EDT
FOR CLARION COUNTY...

AT 455 AM EDT...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF
PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.
 THIS STORM WAS LOCATED NEAR TURKEY CITY...MOVING NORTHEAST AT 60
MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO  
  RIMERSBURG...         KNOX...               EAST BRADY...
  LIMESTONE...

LAT...LON 4111 7929 4097 7954 4098 7958 4097 7962
      4099 7963 4099 7960 4100 7959 4101 7962
      4103 7960 4105 7967 4117 7969 4123 7963
      4129 7953
TIME...MOT...LOC 0902Z 230DEG 53KT 4125 7951

$$

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 Apr 20, 3:34 AM EDT, 1 hour 3 minutes earlier.

Area forecast discussion, Apr 20, 3:34 AM EDT, 1 hour 3 minutes before

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE PITTSBURGH PA
334 AM EDT WED APR 20 2011

.SYNOPSIS...
A STRONG COLD FRONT WILL MOVE THROUGH THE AREA THIS MORNING. THIS
FRONT WILL BRING MORE SHOWERS AND STORMS TODAY. HIGH PRESSURE
WILL PROVIDE DRY AND COOL CONDITIONS TONIGHT THROUGH THURSDAY.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
UPDATED TO INCLUDE SVR WATCH 164.

RECENT RADAR DATA, USED IN CONJUNCTION WITH LATEST MODEL RUNS,
SHOWS THE LINE OF STRONG TO SEVERE THUNDERSTORMS OVER W OHIO,
CONTINUING TO WEAKEN AS IT MOVES EASTWARD INTO MORE STABLE AIR.
EXPECT THE LINE TO MOVE THROUGH THE AREA THIS MORNING, AHEAD OF
COLD FRONT WHICH WILL MOVE INTO C PA BY 18Z. LATEST DAY1 OUTLOOK
FROM SPC, MOVES THE SLIGHT RISK FOR SEVERE TO THE EAST OF THE
REGION. ALL THE DATA AND RECENT EVENTS, POINT TO A NON SEVERE
EVENT AFTER WATCH ENDS.

ACTIVITY WILL WIND DOWN VERY QUICKLY AFTER THE FRONT MOVES
EASTWARD AND WOULD EXPECT JUST SHOWERS BEHIND THE FRONT.

FORECASTED TEMPERATURES USING BLEND OF GFS MOS AND 21Z SREF VALUES.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH FRIDAY/...
RECENT SREF MODEL OUTPUT CONTINUES TO SHOW HIGH PRESSURE COMING
EAST FROM THE DAKOTAS TO PROVIDE DRY CONDITIONS WITH SEASONABLY COOL
TEMPERATURES ACROSS THE UPPER OHIO VALLEY TONIGHT AND THURSDAY.

MODEL SOLUTIONS VARY WITH THE THU NIGHT AND FRIDAY FORECAST.
ANOTHER WARM FRONT WILL MOVE NORTHWARD THROUGH THE UPPER OHIO
VALLEY BY THE END OF THE WORK WEEK. MODELS ARE INDICATING THAT A
WAVE WILL MOVE ALONG THE NORTHERN FLANK OF THE FRONT LATE THURSDAY
NIGHT AND FRIDAY MORNING. THE DIFFERENCES ARRIVE WITH THE POSITION
OF THE FRONT FRIDAY, AND THE LOCATION OF THE WAVE. NAM KEEPS
EVERYTHING FURTHER SOUTH ON FRIDAY, INCLUDE THE UNSTABLE AIR. THE
GFS KEEPS THE AREA STABLE, BUT MOVES THE FRONT FURTHER NORTH. FOR
NOW WILL GO WITH A COMPROMISE AND KEEP THE HIGHER POPS ACROSS THE
SOUTH ON FRIDAY.

FORECASTED TEMPERATURES USING MAINLY GFS MOS.

&&

.LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/...
MODELS SHOWING SIMILAR OUTPUT FRIDAY NIGHT, WITH ANOTHER WAVE
MOVING NORTHWARD ALONG SFC BOUNDARY. FRIDAY NIGHT APPEARS TO BE A
BETTER TIME FOR MORE WIDESPREAD RAIN, WITH THE UNSTABLE AIR
REMAINING SOUTH OF THE REGION.

COLD FRONT ASSOCIATED WITH NEXT SYSTEM WILL MOVE ACROSS THE AREA
LATE SAT AND THEN STALL BY SAT NIGHT. THIS STALLED FRONT WILL KEEP
IN THE RISK FOR ACTIVITY THROUGH SUNDAY AND INTO MONDAY.

MODELS ARE IN DECENT AGREEMENT PUSHING FRONT NORTHWARD ON MONDAY
AND ALLOWING THE REGION TO ENTER THE WARM SECTOR BY TUESDAY.

AT THIS POINT, NOT A LOT OF CONFIDENCE IN THE LONG TERM FORECAST
AS MODELS GETTING A HANDLE ON A STATIONARY FRONT THAT FAR OUT,
GENERALLY RUN INTO PROBLEMS WITH THE DETAILS.

&&

.AVIATION /08Z WEDNESDAY THROUGH SUNDAY/...
LOW PRESSURE OVER OHIO WILL SWEEP A COLD FRONT ACROSS THE REGION
TODAY WITH FROPA LATE MORNING AT ZZV TO EARLY AFTERNOON ACROSS THE
EASTERN TERMINALS. GENERAL VFR AHEAD OF FRONT WITH INVERSION IN
PLACE AND LOW LEVEL JET OF 50KTS AT 2K FT HAVE ADDED LLWS UNTIL
FRONT APPROACHES TO MIX ATMOSPHERE. WITH INVERSION AND WEAK
INSTABILITY HAVE KEPT CB IN TERMINALS BUT EXPECTING ONLY MVFR WITH
FROPA IN SHOWERS AND ISOLATED THUNDERSTORMS. WITH FRONT AND BEHIND
STRONG PRESSURE GRADIENT WILL BRING WEST WINDS GUSTING TO NEAR 30KTS
INTO EARLY EVENING BEFORE DIMINISHING. SURFACE HIGH ACROSS WESTERN
GREAT LAKES WILL THEN SHIFT EAST WITH VFR CONDITIONS INTO THURSDAY
NIGHT.

A WARM FRONT WILL APPROACH FROM THE SOUTHWEST ON FRIDAY AND RETURN
THE CHANCE OF SHOWERS AND THUNDERSTORMS WITH RESTRICTIONS. LOW
PRESSURE MOVING ACROSS THE OHIO VALLEY WILL BRING POSSIBLE
RESTRICTIONS SATURDAY WITH A FRONT STALLING ACROSS REGION FOR SUNDAY.

&&

.PBZ WATCHES/WARNINGS/ADVISORIES...
MD...NONE.
OH...NONE.
PA...NONE.
WV...NONE.

&&

Hazardous weather outlook, Apr 20, 2:24 AM EDT, 2 hours 13 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE PITTSBURGH PA
224 AM EDT WED APR 20 2011

OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>023-029-
031-073>076-WVZ001>004-012-021>023-041-210630-
TUSCARAWAS-CARROLL-COLUMBIANA-COSHOCTON-HARRISON-JEFFERSON OH-
MUSKINGUM-GUERNSEY-BELMONT-NOBLE-MONROE-MERCER-VENANGO-FOREST-
LAWRENCE-BUTLER-CLARION-JEFFERSON PA-BEAVER-ALLEGHENY-ARMSTRONG-
INDIANA-WASHINGTON-GREENE-WESTMORELAND-WESTMORELAND RIDGES-FAYETTE-
FAYETTE RIDGES-HANCOCK-BROOKE-OHIO-MARSHALL-WETZEL-MARION-MONONGALIA-
PRESTON-TUCKER-
224 AM EDT WED APR 20 2011

...SEVERE THUNDERSTORM WATCH 164 IN EFFECT UNTIL 9 AM EDT THIS
MORNING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL OHIO...NORTHWEST
PENNSYLVANIA...SOUTHWEST PENNSYLVANIA...WEST CENTRAL
PENNSYLVANIA...NORTHERN WEST VIRGINIA AND NORTHERN PANHANDLE OF
WEST VIRGINIA.

.DAY ONE...TODAY AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   SEVERE THUNDERSTORM WATCH.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

MDZ001-210630-
GARRETT-
224 AM EDT WED APR 20 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MARYLAND.

.DAY ONE...TODAY AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

In the hours before

Local storm report, Apr 20, 3:58 AM EDT, 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
358 AM EDT WED APR 20 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0340 AM     TSTM WND DMG     1 E NEW CONCORD         39.99N  81.72W
04/20/2011                   GUERNSEY           OH   LAW ENFORCEMENT

            POWER LINES DOWN ON PATCH ROAD

&&

EVENT NUMBER PBZ1100645

ASMITH

Local storm report, Apr 20, 4:03 AM EDT, 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
403 AM EDT WED APR 20 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0350 AM     TSTM WND DMG     SHERRODSVILLE           40.49N  81.24W
04/20/2011                   CARROLL            OH   LAW ENFORCEMENT

            POWERLINES REPORTED DOWN IN SHERRODSVILLE

&&

EVENT NUMBER PBZ1100646

ASMITH

Local storm report, Apr 20, 4:14 AM EDT, 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
414 AM EDT WED APR 20 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0330 AM     TSTM WND DMG     NEW PHILADELPHIA        40.49N  81.44W
04/20/2011                   TUSCARAWAS         OH   LAW ENFORCEMENT

            TREES AND POWERLINES DOWN IN NEW PHILADELPHIA

&&

EVENT NUMBER PBZ1100647

ASMITH

Local storm report, Apr 20, 4:17 AM EDT, 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
417 AM EDT WED APR 20 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0414 AM     TSTM WND DMG     3 NE NEWCOMERSTOWN      40.30N  81.57W
04/20/2011                   TUSCARAWAS         OH   LAW ENFORCEMENT

            GARAGE DESTROYED ON BEAGLE CLUB ROAD

&&

EVENT NUMBER PBZ1100648

ASMITH

Local storm report, Apr 20, 4:22 AM EDT, 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
422 AM EDT WED APR 20 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0400 AM     TSTM WND DMG     GAVERS                  40.71N  80.81W
04/20/2011                   COLUMBIANA         OH   LAW ENFORCEMENT

            TREES AND POWERLINES DOWN IN GAVERS

&&

EVENT NUMBER PBZ1100649

ASMITH

Local storm report, Apr 20, 4:29 AM EDT, 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
429 AM EDT WED APR 20 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0415 AM     TSTM WND DMG     2 S OHIOVILLE           40.65N  80.49W
04/20/2011                   BEAVER             PA   911 CALL CENTER

            TREES DOWN IN OHIOVILLE BLOCKING STATE ROUTE 68

&&

EVENT NUMBER PBZ1100650

ASMITH

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 19, 8:16 PM EDT	Special Weather Statement	PBZ	Allegheny	44 min
Apr 19, 8:43 PM EDT	Special Weather Statement	PBZ	Indiana	47 min
Apr 20, 3:51 AM EDT	Special Weather Statement	PBZ	Mercer, Venango	39 min
Apr 20, 4:11 AM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Butler, Lawrence, Mercer	34 min
Apr 20, 4:57 AM EDT	Special Weather Statement	PBZ	Fayette, Greene, Westmoreland	63 min
Apr 20, 5:13 AM EDT	Special Weather Statement	PBZ	Forest, Jefferson	47 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2011 Every severe thunderstorm warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.