Alert archive / New York / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 20, NWS Buffalo, NY

June 26, 2009Genesee County, Monroe County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jun 26, 2009, 12:10 PM EDT for Genesee County, Monroe County, New York. It was in force for 65 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
Jun 26, 2009, 12:10 PM EDT (16:10 UTC)
Expired
Jun 26, 2009, 1:15 PM EDT
In force
65 min
Issued by
NWS Buffalo, NY
Area
Storm-based polygon

Counties Genesee County, NY, Monroe County, NY

The radar

The Buffalo radar (KBUF), 78 km from the middle of the area, began a volume at 16:12 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

TimeReportWhereRemark
Jun 26, 1:08 PM EDTHAIL 1Greece, NY
Jun 26, 1:10 PM EDTHAIL 1Rochester, 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, 4.2 hours before the alert went out and 76 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-pSkew-T log-p diagram, Buffalo Intl Airport, NY at 12:00Z on 2009-06-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 974 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Buffalo Intl Airport, NY at 12:00Z on 2009-06-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 79 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
974 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
717 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
79 m²/s²
0-3 km storm-relative helicity
96 m²/s²
Significant tornado parameter
0.3
Supercell composite
1.4

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KBUF 261610
SVRBUF
NYC037-055-261715-
/O.NEW.KBUF.SV.W.0020.090626T1610Z-090626T1715Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
1210 PM EDT FRI JUN 26 2009

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN GENESEE COUNTY IN WESTERN NEW YORK
  MONROE COUNTY IN WESTERN NEW YORK

* UNTIL 115 PM EDT

* AT 1208 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  BYRON...OR 9 MILES SOUTHWEST OF BROCKPORT...AND MOVING EAST AT 20
  MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  CHURCHVILLE BY 1235 PM EDT...
  SPENCERPORT BY 1245 PM EDT...
  GATES-NORTH GATES BY 100 PM EDT...
  ROCHESTER BY 110 PM EDT...
  BRIGHTON BY 115 PM EDT...

LAT...LON 4297 7772 4299 7773 4299 7790 4301 7813
      4313 7812 4313 7800 4317 7798 4326 7748
      4326 7746 4294 7748
TIME...MOT...LOC 1610Z 266DEG 18KT 4311 7805

$$

ZAFF
2 follow-up statements
000 
WWUS51 KBUF 261635
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
1235 PM EDT FRI JUN 26 2009

NYC037-261645-
/O.CAN.KBUF.SV.W.0020.000000T0000Z-090626T1715Z/
GENESEE NY-
1235 PM EDT FRI JUN 26 2009

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN GENESEE COUNTY IS
CANCELLED...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM EDT FRIDAY
EVENING FOR WESTERN NEW YORK.

LAT...LON 4297 7772 4299 7773 4299 7790 4302 7791
      4302 7790 4304 7790 4305 7795 4313 7791
      4314 7800 4317 7798 4326 7746 4294 7748
TIME...MOT...LOC 1635Z 259DEG 17KT 4312 7790

$$

NYC055-261715-
/O.CON.KBUF.SV.W.0020.000000T0000Z-090626T1715Z/
MONROE NY-
1235 PM EDT FRI JUN 26 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 PM EDT
FOR MONROE COUNTY...

AT 1234 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR CHURCHVILLE...OR 7 MILES SOUTH OF BROCKPORT...MOVING
EAST AT 20 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  SPENCERPORT BY 1250 PM EDT...
  GATES-NORTH GATES BY 105 PM EDT...
  GREECE BY 110 PM EDT...
  ROCHESTER BY 115 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM EDT FRIDAY
EVENING FOR WESTERN NEW YORK.

&&

LAT...LON 4297 7772 4299 7773 4299 7790 4302 7791
      4302 7790 4304 7790 4305 7795 4313 7791
      4314 7800 4317 7798 4326 7746 4294 7748
TIME...MOT...LOC 1635Z 259DEG 17KT 4312 7790

$$

ZAFF
000 
WWUS51 KBUF 261710
SVSBUF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BUFFALO NY
110 PM EDT FRI JUN 26 2009

NYC055-261719-
/O.EXP.KBUF.SV.W.0020.000000T0000Z-090626T1715Z/
MONROE NY-
110 PM EDT FRI JUN 26 2009

...THE SEVERE THUNDERSTORM WARNING FOR MONROE COUNTY WILL EXPIRE AT
115 PM EDT...

ANOTHER SEVERE THUNDESTORM WARNING AS BEEN ISSUED FOR MONROE COUNTY 
UNTIL 215 PM.  PLEASE SEE THE LATEST WARNING FOR ADDITIONAL 
INFORMATION.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM EDT FRIDAY
EVENING FOR WESTERN NEW YORK.

LAT...LON 4297 7772 4299 7773 4299 7790 4302 7791
      4302 7790 4304 7790 4305 7795 4313 7791
      4314 7800 4317 7798 4326 7746 4294 7748
TIME...MOT...LOC 1709Z 259DEG 17KT 4315 7768

$$

ZAFF

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 25, 8:01 PM EDTSevere Thunderstorm WarningBUFAllegany, Cattaraugus, Erie, Wyoming31 min
Jun 25, 8:10 PM EDTSpecial Marine WarningBUF37 min
Jun 25, 8:14 PM EDTSpecial Marine WarningBUF31 min
Jun 26, 5:43 AM EDTSevere Thunderstorm WarningBUFCayuga, Wayne62 min
Jun 26, 12:17 PM EDTSevere Thunderstorm WarningBUFAllegany, Livingston37 min
Jun 26, 12:28 PM EDTSpecial Marine WarningBUF44 min
Jun 26, 12:41 PM EDTSevere Thunderstorm WarningBUFMonroe, Orleans, Wayne64 min
Jun 26, 12:50 PM EDTSpecial Marine WarningBUF55 min
Jun 26, 1:06 PM EDTSpecial Marine WarningBUF84 min
Jun 26, 1:09 PM EDTSevere Thunderstorm WarningBUFMonroe66 min
Jun 26, 1:32 PM EDTFlash Flood WarningBUFMonroe, Ontario, Wayne3 hr
Jun 26, 1:34 PM EDTSevere Thunderstorm WarningBUFCayuga, Monroe, Ontario, Wayne56 min
Jun 26, 1:34 PM EDTSevere Thunderstorm WarningBUFAllegany29 min
Jun 26, 1:47 PM EDTFlash Flood WarningBUFAllegany3 hr
Jun 26, 2:23 PM EDTSevere Thunderstorm WarningBUFLivingston, Monroe, Ontario67 min
Jun 26, 2:47 PM EDTSpecial Marine WarningBUF88 min
Jun 26, 3:11 PM EDTSevere Thunderstorm WarningBUFJefferson49 min
Jun 26, 3:46 PM EDTSevere Thunderstorm WarningBUFJefferson, Oswego31 min
Jun 26, 4:13 PM EDTSpecial Marine WarningBUF30 min
Jun 26, 4:39 PM EDTFlash Flood WarningBUFWyoming87 min
Jun 26, 5:27 PM EDTSpecial Marine WarningBUF32 min

Nearby

Severe Thunderstorm Warnings in New York, 2009Every severe thunderstorm warning in 2009

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.