Alert archive / New York / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 11, NWS Buffalo, NY

June 20, 2001Monroe County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Jun 20, 2001, 6:44 AM EDT for Monroe County, New York. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 20, 2001, 6:44 AM EDT (10:44 UTC)
Expired
Jun 20, 2001, 7:15 AM EDT
In force
31 min
Issued by
NWS Buffalo, NY
Area
Whole counties

County Monroe County, NY

The radar

The Buffalo radar (KBUF), 93 km from the middle of the area, began a volume at 10:45 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.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 10.7 hours before the alert went out and 90 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 00:00Z on 2001-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 348 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 00:00Z on 2001-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 147 square meters per square second.193958Sfc1 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
348 J/kg
Mixed-layer CIN
-107 J/kg
Mixed-layer LCL
2025 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
147 m²/s²
0-3 km storm-relative helicity
166 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KBUF 201046
SVRBUF

NYC055-201115-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
644 AM EDT WED JUN 20 2001

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN MONROE COUNTY IN WESTERN NEW YORK
  THIS INCLUDES THE CITIES OF...GREECE...HILTON

* UNTIL 715 AM EDT

* AT 639 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER HILTON...OR ABOUT 3 MILES SOUTH OF
  HILTON...MOVING NORTHEAST AT 20 MPH.

THE STORM WILL MOVE OFFSHORE INTO LAKE ONTARIO BY 715AM. THIS STORM 
HAS THE POTENTIAL TO PRODUCE FREQUENT LIGHTNING...DAMAGING WINDS AND 
HAIL.

IF YOU ARE IN THE PATH OF THIS STORM TAKE SHELTER IMMEDIATELY.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 19, 8:58 PM EDTSevere Thunderstorm WarningBUFNiagara, Orleans62 min
Jun 20, 2:45 AM EDTSevere Thunderstorm WarningBUFErie, Niagara60 min

Nearby

Severe Thunderstorm Warnings in New York, 2001Every severe thunderstorm warning in 2001

Sources

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