Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 41, NWS Binghamton, NY

April 28, 20115 counties in Pennsylvania; 4 counties in New York

NWS Binghamton, NY issued this severe thunderstorm warning at Apr 28, 2011, 4:47 AM EDT for 5 counties in Pennsylvania; 4 counties in New York. It was in force for 43 min. 7 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 28, 2011, 4:47 AM EDT (08:47 UTC)
Expired: Apr 28, 2011, 5:30 AM EDT
In force: 43 min
Issued by: NWS Binghamton, NY
Area: Storm-based polygon

Counties Broome County, NY, Chenango County, NY, Delaware County, NY, Otsego County, NY, Lackawanna County, PA, Luzerne County, PA, Susquehanna County, PA, Wayne County, PA, Wyoming County, PA

The radar

The Binghamton radar (KBGM), 90 km from the middle of the area, began a volume at 08:50 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 28, 4:50 AM EDT	TSTM WND DMG	Lehman, PA	AT LEAST 60 LARGE TREES DOWN IN A SWATH.
Apr 28, 4:55 AM EDT	TSTM WND DMG	Lehman, PA	STRAIGHT LINE WINDS OF AROUND 95 MPH OCCURRED...WITH A PATH LENGTH OF 1 MILE...AND A PATH WIDTH OF AROUND 500 YARDS. MAINLY TREE DAMAGE OCCURRED. THE DAMAGE WAS CONCENTRATED NEAR MARKET STREET...AND TO THE WEST OF HUNTSVILLE RESERVOIR. NUMEROUS TREES WERE SNAP
Apr 28, 5:00 AM EDT	TSTM WND DMG	Conklin, NY	TREES DOWN IN CONKLIN AND THE TOWN OF BINGHAMTON.
Apr 28, 5:10 AM EDT	TSTM WND DMG	Bainbridge, NY	TREE DAMAGE AND STRUCTURAL DAMAGE BETWEEN COUNTY ROUTE 17 AND ROUNDS ROAD
Apr 28, 5:20 AM EDT	TSTM WND DMG	Falls, PA	STRAIGHT LINE WINDS OF AROUND 80 MPH OCCURRED...WITH A PATH LENGTH OF 0.25 MILES...AND A PATH WIDTH OF ABOUT 100 YARDS. TREE DAMAGE...AND SOME STRUCTURAL DAMAGE OCCURRED. MANY TREES WERE UPROOTED. A GARAGE WAS PARTIALLY COLLAPSED...WITH ONE OF THE DOORS COMPLE
Apr 28, 5:26 AM EDT	TSTM WND DMG	East Benton, PA	PENNSYLVANIA POWER AND LIGHT TRUCK BLOWN OVER -- TIME RADAR ESTIMATED
Apr 28, 5:35 AM EDT	TSTM WND DMG	East Benton, PA	PENNSYLVANIA POWER AND LIGHT TRUCK BLOWN OVER

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 6 storm reports to this severe thunderstorm warning; the first came 3 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 28, 4:05 AM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Albany, NY (KALY), launched 00:00Z, 8.8 hours before the alert went out and 205 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: 108 J/kg
Mixed-layer CIN: -95 J/kg
Mixed-layer LCL: 777 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 307 m²/s²
0-3 km storm-relative helicity: 401 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.8

Open this sounding in Storm Lab

The text

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

128 
WUUS51 KBGM 280847
SVRBGM
NYC007-017-025-077-PAC069-079-115-127-131-280930-
/O.NEW.KBGM.SV.W.0041.110428T0847Z-110428T0930Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BINGHAMTON NY
447 AM EDT THU APR 28 2011

THE NATIONAL WEATHER SERVICE IN BINGHAMTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN BROOME COUNTY IN CENTRAL NEW YORK...
  SOUTHERN CHENANGO COUNTY IN CENTRAL NEW YORK...
  WESTERN DELAWARE COUNTY IN CENTRAL NEW YORK...
  SOUTHWESTERN OTSEGO COUNTY IN CENTRAL NEW YORK...
  LACKAWANNA COUNTY IN NORTHEAST PENNSYLVANIA...
  LUZERNE COUNTY IN NORTHEAST PENNSYLVANIA...
  SUSQUEHANNA COUNTY IN NORTHEAST PENNSYLVANIA...
  WAYNE COUNTY IN NORTHEAST PENNSYLVANIA...
  WYOMING COUNTY IN NORTHEAST PENNSYLVANIA...

* UNTIL 530 AM EDT.

* AT 445 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM NORWICH TO BINGHAMTON TO BRACKNEY TO MESHOPPEN TO 
  OLD FORGE TO NEAR FREELAND... AND MOVING EAST AT 40 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  MONTROSE...LAKE CAREY...KIRKWOOD AND CONKLIN BY 452 AM EDT...
  MOOSIC BY 454 AM EDT...
  GUILFORD...TOMPKINSVILLE AND SCRANTON BY 456 AM EDT...
  NINEVEH...HARPURSVILLE...HALLSTEAD AND GREAT BEND BY 458 AM EDT...

IN ADDITION TO STRONG WINDS... VERY HEAVY RAIN WILL OCCUR WITH THESE 
STORMS. RAINFALL AMOUNTS OF AROUND AN INCH WILL BE ENOUGH TO CAUSE 
FLASH FLOODING IN SOME AREAS. 

WHEN YOU CAN DO SO SAFELY...PLEASE REPORT HAIL...OR DAMAGING WINDS TO
THE NATIONAL WEATHER SERVICE BY CALLING TOLL FREE AT
1-877-633-6772...OR BY EMAIL AT BGM.STORMREPORT@NOAA.GOV.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...SEEK SHELTER INDOORS AND STAY
AWAY FROM WINDOWS!

&&

LAT...LON 4094 7621 4113 7626 4191 7607 4258 7561
      4259 7491 4221 7509 4137 7527 4137 7535
      4131 7532 4124 7535 4122 7555 4112 7564
      4109 7577 4099 7576 4091 7599
TIME...MOT...LOC 0846Z 262DEG 36KT 4253 7551 4207 7584
          4193 7592 4160 7600 4177 7568 4160 7573
          4140 7581 4102 7572 4085 7619

$$

MSE

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 Binghamton, NY wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 28, 4:37 AM EDT, 10 minutes earlier.

Area forecast discussion, Apr 28, 4:37 AM EDT, 10 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BINGHAMTON NY
437 AM EDT THU APR 28 2011

.SYNOPSIS...
LOW PRESSURE MOVING THROUGH THE GREAT LAKES WILL PUSH A COLD FRONT
THROUGH THE AREA THIS MORNING BRINGING SHOWERS AND THUNDERSTORMS.
A NORTHWEST FLOW OF COOL AIR...ALONG WITH AN UPPER LEVEL LOW
PRESSURE AREA WILL KEEP SHOWERS IN THE AREA THROUGH FRIDAY.

&&

.NEAR TERM / TODAY /...

VERY BUSY SHIFT WITH MULTIPLE TORNADO AND FLOOD WARNINGS. VERY
GOOD LL SHEAR IS OVERCOMING MRGNL INSTABILITY TO PRODUCE MINI
SUPERCELLS AND SVRL DAMAGE RPTS. SEE LTL CHG IN THE SCENARIO UNTIL
THE FNTL PASSAGE ARND OR AFT 12Z. OTR BIG CONCERN IS FLOODING WITH
SATURATED GND AND RVRS AND STREAMS ALREADY RUNNING HIGH FROM PRVS
RAINS. XPCT CONTD FLOODING PRBLMS AHD OF THE FNT WITH PS APRCHG
1.75.

&&

.SHORT TERM /TONIGHT THRU SATURDAY/...

UPR LOW OVER THE ERN GREAT LAKES WILL DRFT EWRD ON FRI AND FRI
NGT. INSTABILITY WITH THE COLD POOL ALOFT WILL BRING ADTNL TO THE
AREA...WITH SOME ISLTD TRW PSBL. SHRP RDGG AND MUCH DRIER AIR WILL
BRING A BRIEF BRK IN THE RAINY PTRN FOR SAT WITH TEMPS RISING TO
NEAR NRML WITH SUN.

&&

.LONG TERM /TONIGHT THROUGH WEDNESDAY/...
UL RIDGE AXIS AT THE START OF THE PD WL GRADUALLY SLIDE EAST ON
SUNDAY. EC IS A LITTLE SLOWER TO BREAK DOWN THE RIDGE BUT EXPECT SFC
FRONTAL BNDRY TO MV THRU THE GREAT LKS WITH A WARM FRONT LIFTING
THRU SUN/SUN NGT. HV BASICALLY FOLLOWED HPC GUIDANCE WHICH FOLLOWS
CLOSELY WITH THE EURO.

THUS, CHC POPS FM 12Z SUNDAY ON FOR STALLED FRONTAL BNDRY NR THE
REGION. LATER IN THE PD, THE EURO DRIVES A WV UP INTO THE CWA BY THE
END OF THE PD. MEANWHILE THE 12Z GFS BRINGS THE FRONT THRU WITH DRY
WX MVG IN BHND MON/MON NGT. WL MAINTAIN CHC FOR SHOWERS SIMILAR  TO
HPC GUIDANCE THRU TUE NGT. HWVR LONG TERM FCST IS UP IN THE AIR
AFTER MONDAY.

&&

.AVIATION /08Z THURSDAY THROUGH MONDAY/...
SVR CONV MVG THRU THE AREA ATTM. SHRT WV LFTG THRU THE ERN LAKES
IS PUSHING A FNT EWRD TWRDS THE AREA THIS MRNG TRIGGERING SHWRS
AND ISLTD SVR TRWS. FNT WILL PASS ARND 12Z AND BE FLWD BY DRIER
AIR AND GNRL VFR CONDS. VFR CONDS WILL LINGER THRU THE END OF THE
TAF PD.

OUTLOOK...

THU NGT TO FRI NGT...MVFR MAINLY CENTRAL NY IN SCATTERED -SHRA.

SAT/SAT NGT...VFR.

SUN TO MON...MVFR IN SCT -SHRA.

&&

.HYDROLOGY...
HEAVY RAIN ON SATURATED SOILS HAS CAUSED MINOR FLOODING AT SVRL
POINTS ALONG THE SUSQUEHANNA RIVER SYSTEM...AND ALSO AT ONONDAGA
LAKE. ANTECEDENT HYDROLOGIC CONDITIONS HAVE NEARLY ZERO TOLERANCE
FOR ADDITIONAL RAINFALL IN THE NEXT 12-24 HRS.

FLASH FLOOD WATCH CONTINUES FOR THE ENTIRE CWA INTO THURSDAY
AFTERNOON. HEAVY LOCALIZED RAIN WITH THUNDERSTORMS HAS CAUSED
FLASH FLOODING THIS EVENING.

ADDITIONAL WIDESPREAD RAINFALL EXPECTED LATER TONIGHT SHOULD BRING
ANOTHER THREE QUARTERS TO ONE INCH TO MANY BASINS. THIS MAY BE
EXACERBATED BY LOCALLY TORRENTIAL RAINFALL IN CONVECTION. MORE
FLASH FLOODING IS LIKELY. CONTINUED MINOR RIVER FLOODING...TO
MODERATE AT SOME POINTS IS LIKELY WITH ADDITIONAL RISES EXPECTED
DUE TO THIS NEW RAINFALL FORECAST. HEADWATER POINTS ALONG THE
SUSQUEHANNA AND DELAWARE BASINS WILL NEED MONITORING AS MANY OF
THESE ARE NOT INDICATED TO BE IN FLOOD AT THIS TIME. THEY WILL
REACH FS IF CONVECTION HITS THE PARTICULAR BASINS.

&&

.BGM WATCHES/WARNINGS/ADVISORIES...
PA...FLASH FLOOD WATCH UNTIL 2 PM EDT THIS AFTERNOON FOR PAZ038>040-
     043-044-047-048-072.
NY...FLASH FLOOD WATCH UNTIL 2 PM EDT THIS AFTERNOON FOR NYZ009-
     015>018-022>025-036-037-044>046-055>057-062.

&&

SYNOPSIS...DGM
NEAR TERM...DGM
SHORT TERM...DGM
LONG TERM...PVN
AVIATION...DGM/TAC
HYDROLOGY...

Hazardous weather outlook, Apr 28, 4:31 AM EDT, 16 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BINGHAMTON NY
431 AM EDT THU APR 28 2011

NYZ015>018-022>025-290845-
YATES-SENECA-SOUTHERN CAYUGA-ONONDAGA-STEUBEN-SCHUYLER-CHEMUNG-
TOMPKINS-
431 AM EDT THU APR 28 2011

...FLASH FLOOD WATCH IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NEW YORK.

.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.

   FLASH FLOOD WATCH.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

SEVERE WEATHER IS NOT EXPECTED.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL BE NEEDED FOR ALL WARNINGS.

NYZ009-036-037-044>046-055>057-062-PAZ038>040-043-044-047-048-072-
290845-
NORTHERN ONEIDA-MADISON-SOUTHERN ONEIDA-CORTLAND-CHENANGO-OTSEGO-
TIOGA-BROOME-DELAWARE-SULLIVAN-BRADFORD-SUSQUEHANNA-NORTHERN WAYNE-
WYOMING-LACKAWANNA-LUZERNE-PIKE-SOUTHERN WAYNE-
431 AM EDT THU APR 28 2011

...FLASH FLOOD WATCH IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON...
...SEVERE THUNDERSTORM WATCH 249 IN EFFECT UNTIL 10 AM EDT THIS
MORNING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NEW
YORK...SOUTHEASTERN NEW YORK AND NORTHEAST PENNSYLVANIA.

.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.

   FLASH FLOOD WATCH.
   SEVERE THUNDERSTORM WATCH.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

SEVERE WEATHER IS NOT EXPECTED.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL BE NEEDED FOR ALL WARNINGS.

In the hours before

Special weather statement, Apr 28, 1:11 AM EDT, 3 hours 36 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BINGHAMTON NY
111 AM EDT THU APR 28 2011

NYZ024-055-PAZ038-280600-
BRADFORD PA-CHEMUNG NY-TIOGA NY-
111 AM EDT THU APR 28 2011

...STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN BRADFORD...
SOUTHEASTERN CHEMUNG AND SOUTHWESTERN TIOGA COUNTIES...

* AT 108 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  STRONG THUNDERSTORM CAPABLE OF PRODUCING STRONG GUSTY WINDS...AND
  VERY HEAVY RAIN.  THIS STORM WAS LOCATED NEAR GILLETT...AND MOVING
  NORTHEAST AT 55 MPH.

* THE STRONG THUNDERSTORM WILL BE NEAR...
  CHEMUNG AND WILAWANA AT 120 AM EDT...
  OWENS MILL AND LOCKWOOD AT 125 AM EDT...
  VAN ETTEN AND SWARTWOOD AT 130 AM EDT...
  TIOGA CENTER AND LOUNSBERRY AT 135 AM EDT...

THIS STORM HAS THE POTENTIAL TO BECOME SEVERE AND PRODUCE LARGE HAIL
AND/OR DAMAGING WINDS.

LAT...LON 4224 7668 4224 7663 4201 7619 4185 7680
      4196 7694 4200 7694

MSE

Local storm report, Apr 28, 2:07 AM EDT, 2 hours 40 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BINGHAMTON NY
207 AM EDT THU APR 28 2011

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

0150 AM     TSTM WND DMG     SPENCER                 42.22N  76.49W
04/28/2011                   TIOGA              NY   PUBLIC

            NUMEROUS TREES DOWN

&&

MJN

Special weather statement, Apr 28, 2:11 AM EDT, 2 hours 36 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BINGHAMTON NY
211 AM EDT THU APR 28 2011

NYZ025-044-045-055-056-PAZ038-039-280715-
BRADFORD PA-BROOME NY-CHENANGO NY-CORTLAND NY-SUSQUEHANNA PA-TIOGA
NY-TOMPKINS NY-
211 AM EDT THU APR 28 2011

...LINE OF STRONG THUNDERSTORMS WILL AFFECT BRADFORD...CHENANGO...
EXTREME SOUTHEASTERN TOMPKINS...NORTHWESTERN SUSQUEHANNA...
SOUTHEASTERN CORTLAND...TIOGA AND WESTERN BROOME COUNTIES...

* AT 208 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF STRONG THUNDERSTORMS CAPABLE OF PRODUCING SMALL HAIL...
  STRONG GUSTY WINDS...AND VERY HEAVY RAIN.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM MARATHON TO CANDOR TO EAST
  SMITHFIELD TO 8 MILES SOUTHWEST OF LE ROY...AND MOVING NORTHEAST AT
  30 MPH.

* STRONG THUNDERSTORMS WILL BE NEAR...
  WELTONVILLE AND TIOGA CENTER AT 220 AM EDT...
  TEXAS VALLEY AND NICHOLS AT 225 AM EDT...
  OWEGO AND SHESHEQUIN AT 230 AM EDT...
  CINCINNATUS AND NANTICOKE AT 235 AM EDT...
  WILLET AND LISLE AT 240 AM EDT...
  WHITNEY POINT AND GERMAN AT 245 AM EDT...
  PHARSALIA AND MAINE AT 250 AM EDT...
  MC DONOUGH AND CAMPVILLE AT 255 AM EDT...

THESE STORMS HAVE THE POTENTIAL TO BECOME SEVERE AND PRODUCE LARGE
HAIL AND/OR DAMAGING WINDS.

LAT...LON 4159 7683 4182 7671 4247 7614 4275 7536
      4212 7592 4176 7614 4157 7664

MLJ

Local storm report, Apr 28, 2:27 AM EDT, 2 hours 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BINGHAMTON NY
227 AM EDT THU APR 28 2011

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

0222 AM     TORNADO          SWARTWOOD               42.23N  76.62W
04/28/2011                   CHEMUNG            NY   LAW ENFORCEMENT

            EMERGENCY MANAGEMENT REPORTS POSSIBLE TORNADO. 6 HOMES
            DAMAGED AND NOT HABITABLE...NUMEROUS TREES DOWN.

&&

MORFORD

Local storm report, Apr 28, 3:35 AM EDT, 1 hour 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BINGHAMTON NY
335 AM EDT THU APR 28 2011

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

0140 AM     TORNADO          1 NE DANBY              42.36N  76.47W
04/28/2011                   TOMPKINS           NY   EMERGENCY MNGR

            POSSIBLE TORNADO...4 TO 5 HOMES WITH MAJOR STRUCTURAL
            DAMAGE

&&

MORFORD

Local storm report, Apr 28, 4:01 AM EDT, 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BINGHAMTON NY
401 AM EDT THU APR 28 2011

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

0216 AM     TSTM WND DMG     GROTON                  42.59N  76.37W
04/28/2011                   TOMPKINS           NY   FIRE DEPT/RESCUE

            POSSIBLE TORNADO. SEVERAL TREES. ANSD POLES DOWN...ROOF
            OFF HOUSE.

&&

XXX

The office that day

Everything else NWS Binghamton, NY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 27, 8:22 PM EDT	Severe Thunderstorm Warning	BGM	Bradford	53 min
Apr 27, 8:33 PM EDT	Flash Flood Warning	BGM	Bradford	2 hr
Apr 27, 9:02 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Susquehanna, Wyoming	43 min
Apr 27, 9:09 PM EDT	Severe Thunderstorm Warning	BGM	Luzerne, Susquehanna, Wyoming	51 min
Apr 27, 9:40 PM EDT	Severe Thunderstorm Warning	BGM	Susquehanna	41 min
Apr 27, 10:36 PM EDT	Severe Thunderstorm Warning	BGM	Wayne	54 min
Apr 28, 1:22 AM EDT	Severe Thunderstorm Warning	BGM	Bradford	53 min
Apr 28, 2:11 AM EDT	Special Weather Statement	BGM	Bradford	64 min
Apr 28, 2:13 AM EDT	Severe Thunderstorm Warning	BGM	Bradford	47 min
Apr 28, 3:00 AM EDT	Flash Flood Warning	BGM	Bradford	10 hr
Apr 28, 3:29 AM EDT	Flash Flood Warning	BGM	Bradford	10 hr
Apr 28, 3:51 AM EDT	Severe Thunderstorm Warning	BGM	Bradford, Susquehanna, Wyoming	54 min
Apr 28, 4:12 AM EDT	River Flood Warning	BGM	Bradford	25 hr
Apr 28, 4:21 AM EDT	Severe Thunderstorm Warning	BGM	Luzerne, Susquehanna, Wyoming	54 min
Apr 28, 4:23 AM EDT	Flash Flood Warning	BGM	Lackawanna, Luzerne, Susquehanna, Wyoming	9 hr
Apr 28, 5:23 AM EDT	Flash Flood Warning	BGM	Pike, Wayne	9 hr
Apr 28, 5:39 AM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Pike, Susquehanna, Wayne	66 min
Apr 28, 5:46 AM EDT	Tornado Warning	BGM	Susquehanna, Wayne	44 min
Apr 28, 6:05 AM EDT	River Flood Warning	BGM	Bradford	8 hr
Apr 28, 6:48 AM EDT	Severe Thunderstorm Warning	BGM	Pike, Wayne	42 min
Apr 28, 8:16 AM EDT	Special Weather Statement	BGM	Lackawanna, Luzerne	59 min
Apr 28, 8:22 AM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Luzerne, Wyoming	38 min
Apr 28, 8:55 AM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Susquehanna, Wayne	50 min
Apr 28, 9:23 AM EDT	Severe Thunderstorm Warning	BGM	Wayne	37 min
Apr 28, 9:27 AM EDT	Severe Thunderstorm Warning	BGM	Lackawanna, Luzerne, Pike, Wayne	48 min
Apr 28, 9:58 AM EDT	Severe Thunderstorm Warning	BGM	Pike, Wayne	47 min
Apr 28, 10:12 AM EDT	Severe Thunderstorm Warning	BGM	Pike	48 min
Apr 28, 2:16 PM EDT	River Flood Warning	BGM	Wyoming	15 hr
Apr 27, 8:10 PM EDT	Severe Thunderstorm Warning	BGM	Cayuga, Seneca, Yates	65 min
Apr 27, 8:44 PM EDT	Severe Thunderstorm Warning	BGM	Cayuga, Chemung, Chenango, Cortland, Madison, Onondaga and 4 more	61 min
Apr 27, 9:04 PM EDT	Areal Flood Advisory	BGM	Chemung	3 hr
Apr 27, 9:11 PM EDT	Flash Flood Warning	BGM	Cayuga, Seneca, Yates	3 hr
Apr 27, 9:30 PM EDT	Areal Flood Advisory	BGM	Broome, Tioga	3 hr
Apr 27, 10:18 PM EDT	Severe Thunderstorm Warning	BGM	Chenango, Delaware, Madison, Oneida, Otsego	57 min
Apr 27, 10:26 PM EDT	Flash Flood Warning	BGM	Madison, Oneida	2 hr
Apr 27, 10:35 PM EDT	Severe Thunderstorm Warning	BGM	Delaware, Otsego	55 min
Apr 27, 11:54 PM EDT	Flash Flood Warning	BGM	Steuben	6 hr
Apr 28, 12:36 AM EDT	Special Weather Statement	BGM	Schuyler	54 min
Apr 28, 1:05 AM EDT	Areal Flood Advisory	BGM	Chemung, Schuyler, Steuben, Tompkins	6 hr
Apr 28, 1:11 AM EDT	Special Weather Statement	BGM	Chemung	49 min
Apr 28, 1:28 AM EDT	Tornado Warning	BGM	Chemung, Schuyler, Tioga, Tompkins	32 min
Apr 28, 1:53 AM EDT	Tornado Warning	BGM	Cayuga, Cortland, Tompkins	52 min
Apr 28, 2:27 AM EDT	Tornado Warning	BGM	Cortland, Madison, Onondaga	33 min
Apr 28, 2:34 AM EDT	Severe Thunderstorm Warning	BGM	Chenango, Cortland, Madison	41 min
Apr 28, 2:43 AM EDT	Tornado Warning	BGM	Chenango, Cortland, Madison	47 min
Apr 28, 2:48 AM EDT	Severe Thunderstorm Warning	BGM	Broome, Chenango, Cortland, Tioga	27 min
Apr 28, 3:08 AM EDT	Tornado Warning	BGM	Chenango, Madison, Oneida	37 min
Apr 28, 3:12 AM EDT	Tornado Warning	BGM	Chenango, Cortland	63 min
Apr 28, 3:40 AM EDT	Flash Flood Warning	BGM	Broome, Chenango, Madison, Oneida	10 hr
Apr 28, 3:41 AM EDT	Severe Thunderstorm Warning	BGM	Oneida	34 min
Apr 28, 3:45 AM EDT	Severe Thunderstorm Warning	BGM	Broome, Chenango, Cortland	45 min
Apr 28, 3:47 AM EDT	Tornado Warning	BGM	Madison, Oneida	28 min
Apr 28, 3:49 AM EDT	Tornado Warning	BGM	Chenango, Madison, Oneida	26 min
Apr 28, 4:11 AM EDT	Tornado Warning	BGM	Oneida	19 min
Apr 28, 4:12 AM EDT	River Flood Warning	BGM	Chenango, Delaware	53 hr
Apr 28, 4:12 AM EDT	River Flood Warning	BGM	Chemung	25 hr
Apr 28, 4:12 AM EDT	River Flood Warning	BGM	Chenango	29 hr
Apr 28, 4:12 AM EDT	River Flood Warning	BGM	Broome	29 hr
Apr 28, 4:12 AM EDT	River Flood Warning	BGM	Cortland	25 hr
Apr 28, 4:12 AM EDT	Tornado Warning	BGM	Chenango, Madison	33 min
Apr 28, 4:33 AM EDT	Tornado Warning	BGM	Chenango, Madison, Oneida, Otsego	57 min
Apr 28, 4:54 AM EDT	Flash Flood Warning	BGM	Delaware, Otsego	9 hr
Apr 28, 5:16 AM EDT	Severe Thunderstorm Warning	BGM	Otsego	44 min
Apr 28, 6:46 AM EDT	Severe Thunderstorm Warning	BGM	Delaware	29 min
Apr 28, 7:25 AM EDT	Severe Thunderstorm Warning	BGM	Sullivan	35 min
Apr 28, 7:33 AM EDT	Tornado Warning	BGM	Sullivan	15 min
Apr 28, 7:56 AM EDT	Severe Thunderstorm Warning	BGM	Sullivan	28 min
Apr 28, 9:12 AM EDT	Wind Advisory	BGM	Cayuga, Cortland, Madison, Oneida, Onondaga, Schuyler and 4 more	7 hr
Apr 28, 9:37 AM EDT	River Flood Warning	BGM	Delaware, Otsego	30 hr
Apr 28, 9:37 AM EDT	River Flood Warning	BGM	Chenango	45 hr
Apr 28, 9:53 AM EDT	Severe Thunderstorm Warning	BGM	Delaware, Otsego	37 min
Apr 28, 10:11 AM EDT	River Flood Warning	BGM	Delaware	19 hr
Apr 28, 1:28 PM EDT	Flash Flood Warning	BGM	Broome, Chenango	4 hr
Apr 28, 3:22 PM EDT	Areal Flood Warning	BGM	Otsego	8 hr

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2011 Severe Thunderstorm Warnings in New York, 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.