Alert archive / New York / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 49, NWS Buffalo, NY

July 31, 2012Jefferson County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jul 31, 2012, 6:09 PM EDT for Jefferson County, New York. It was in force for 17 min. 1 report 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 31, 2012, 6:09 PM EDT (22:09 UTC)
Expired: Jul 31, 2012, 6:26 PM EDT
In force: 17 min
Issued by: NWS Buffalo, NY
Area: Storm-based polygon

County Jefferson County, NY

The radar

The Ft Drum radar (KTYX), 45 km from the middle of the area, began a volume at 22:12 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 31, 6:16 PM EDT	TSTM WND DMG	3 W Brownville, NY	TREES DOWN

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

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 10.2 hours before the alert went out and 236 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: 43 J/kg
Mixed-layer CIN: -115 J/kg
Mixed-layer LCL: 710 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 69 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

972 
WUUS51 KBUF 312209
SVRBUF
NYC045-312245-
/O.NEW.KBUF.SV.W.0049.120731T2209Z-120731T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
609 PM EDT TUE JUL 31 2012

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL JEFFERSON COUNTY IN CENTRAL NEW YORK

* UNTIL 645 PM EDT

* AT 606 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 12
  MILES WEST OF CALCIUM...OR 8 MILES WEST OF WATERTOWN...AND MOVING
  NORTHEAST AT 15 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...
  BROWNVILLE...
  PERCH RIVER...

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.

&&

LAT...LON 4409 7574 4389 7607 4400 7624 4404 7620
      4403 7618 4401 7619 4402 7616 4404 7618
      4406 7616 4422 7597
TIME...MOT...LOC 2209Z 220DEG 13KT 4398 7606

$$

HITCHCOCK

1 follow-up statement

744 
WWUS51 KBUF 312226
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
626 PM EDT TUE JUL 31 2012

NYC045-312237-
/O.CAN.KBUF.SV.W.0049.000000T0000Z-120731T2245Z/
JEFFERSON NY-
626 PM EDT TUE JUL 31 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL JEFFERSON COUNTY IS
CANCELLED...

AT 627 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED THAT THE SEVERE
THUNDERSTORM THAT PROMPTED THE WARNING HAD WEAKENED AND WAS NO LONGER
SEVERE...THUS THE WARNING HAS BEEN CANCELLED.

LAT...LON 4409 7574 4389 7607 4400 7624 4404 7620
      4403 7618 4401 7619 4402 7616 4404 7618
      4406 7616 4422 7597
TIME...MOT...LOC 2227Z 220DEG 13KT 4403 7600

$$

SMITH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 4:28 PM EDT	Severe Thunderstorm Warning	BUF	Livingston	32 min
Jul 31, 4:50 PM EDT	Areal Flood Advisory	BUF	Genesee, Livingston, Monroe, Wyoming	3 hr
Jul 31, 5:05 PM EDT	Special Weather Statement	BUF	Allegany	55 min
Jul 31, 5:13 PM EDT	Special Marine Warning	BUF		2 hr
Jul 31, 5:22 PM EDT	Flash Flood Warning	BUF	Genesee, Livingston, Monroe	3 hr
Jul 31, 5:31 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Oswego, Wayne	59 min
Jul 31, 5:38 PM EDT	Severe Thunderstorm Warning	BUF	Allegany	52 min
Jul 31, 6:03 PM EDT	Severe Thunderstorm Warning	BUF	Oswego	57 min
Jul 31, 6:10 PM EDT	Special Marine Warning	BUF		88 min
Jul 31, 6:29 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Oswego	61 min
Jul 31, 6:48 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis	72 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.