Alert archive / New York / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 30, NWS Buffalo, NY

July 4, 2012Chautauqua County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jul 4, 2012, 11:04 AM EDT for Chautauqua County, New York. It was in force for 26 min. 3 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: Jul 4, 2012, 11:04 AM EDT (15:04 UTC)
Expired: Jul 4, 2012, 11:30 AM EDT
In force: 26 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

County Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 112 km from the middle of the area, began a volume at 15:07 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, 11:10 AM EDT	TSTM WND DMG	Chautauqua Institute, NY	SEVERAL LARGE TREE LIMBS DOWN
Jul 4, 11:10 AM EDT	HAIL 0.88	Chautauqua Institute, NY	GOLF COURSE REPORTS NICKEL HAIL
Jul 4, 11:10 AM EDT	HAIL 1	Chautauqua Institute, NY

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

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 3.1 hours before the alert went out and 112 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: 748 J/kg
Mixed-layer CIN: -102 J/kg
Mixed-layer LCL: 877 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 121 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

082 
WUUS51 KBUF 041504
SVRBUF
NYC013-041530-
/O.NEW.KBUF.SV.W.0030.120704T1504Z-120704T1530Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
1104 AM EDT WED JUL 4 2012

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN CHAUTAUQUA COUNTY IN WESTERN NEW YORK

* UNTIL 1130 AM EDT

* AT 1058 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR CHAUTAUQUA INSTITUTE...OR 15 MILES NORTHWEST
  OF JAMESTOWN...AND MOVING SOUTHEAST AT 35 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

IF ON OR NEAR CHAUTAUQUA LAKE...GET OUT OF THE WATER AND MOVE 
INDOORS OR INSIDE A VEHICLE. REMEMBER...LIGHTNING CAN STRIKE OUT TO 
15 MILES FROM THE PARENT THUNDERSTORM. IF YOU CAN HEAR THUNDER...YOU 
ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. MOVE TO SAFE SHELTER 
NOW. DON'T BE CAUGHT ON THE WATER IN A THUNDERSTORM!

&&

LAT...LON 4199 7962 4216 7972 4231 7944 4201 7906
      4200 7906
TIME...MOT...LOC 1502Z 324DEG 30KT 4219 7946

$$

SMITH

1 follow-up statement

150 
WWUS51 KBUF 041527
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1127 AM EDT WED JUL 4 2012

NYC013-041534-
/O.EXP.KBUF.SV.W.0030.000000T0000Z-120704T1530Z/
CHAUTAUQUA NY-
1127 AM EDT WED JUL 4 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN CHAUTAUQUA COUNTY
WILL EXPIRE AT 1130 AM EDT...

AT 1124 AM EDT NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE SEVERE
THUNDERSTORM THAT PROMPTED THE WARNING HAD EXITED THE WARNED AREA...
THUS THE WARNING HAS BEEN ALLOWED TO EXPIRE.

HOWEVER...RADAR INDICATED THAT HEAVY RAIN...SMALL HAIL...AND GUSTY 
WINDS WERE STILL POSSIBLE FROM ADDITIONAL THUNDERSTORM ACTIVITY 
THROUGH NOON...ESPECIALLY ACROSS THE SOUTHWESTERN HALF OF THE 
COUNTY...FROM RIPLEY TO BEMUS POINT TO JAMESTOWN.
 

LAT...LON 4199 7962 4216 7972 4231 7944 4201 7906
      4200 7906
TIME...MOT...LOC 1524Z 324DEG 30KT 4204 7931

$$

TMA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 10:55 AM EDT	Special Weather Statement	BUF	Chautauqua	50 min
Jul 4, 4:04 PM EDT	Special Marine Warning	BUF		17 min

Nearby

Severe Thunderstorm Warnings in New York, 2012 Every severe thunderstorm warning in 2012

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.