Alert archive / New York / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 1, NWS Buffalo, NY

April 18, 2004Erie County, Niagara County, New York

NWS Buffalo, NY issued this severe thunderstorm warning at Apr 18, 2004, 10:42 AM EDT for Erie County, Niagara County, New York. It was in force for 48 min. 6 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 18, 2004, 10:42 AM EDT (14:42 UTC)
Expired: Apr 18, 2004, 11:30 AM EDT
In force: 48 min
Issued by: NWS Buffalo, NY
Area: Counties, with a storm outline in the text

Counties Erie County, NY, Niagara County, NY

The radar

The Buffalo radar (KBUF), 30 km from the middle of the area, began a volume at 14:43 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 18, 10:55 AM EDT	HAIL 0.88	Niagara Falls, NY
Apr 18, 10:57 AM EDT	TSTM WND GST 86	Niagara Falls, NY
Apr 18, 11:00 AM EDT	TSTM WND DMG	Niagara Falls, NY	TREES DOWN
Apr 18, 11:00 AM EDT	HAIL 0.75	Niagara Falls, NY
Apr 18, 11:05 AM EDT	TSTM WND DMG	Amherst, NY	TREES BLOWN DOWN AND STRUCTURAL DAMAGE
Apr 18, 11:14 AM EDT	HAIL 0.88	Amherst, 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, 2.7 hours before the alert went out and 34 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1052 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 100 m²/s²
0-3 km storm-relative helicity: 151 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.

190 
WUUS51 KBUF 181442
SVRBUF
NYC029-063-181530-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BUFFALO NY
1041 AM EDT SUN APR 18 2004

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NIAGARA COUNTY IN WESTERN NEW YORK AND
  NORTHERN ERIE COUNTY IN WESTERN NEW YORK

* UNTIL 1130 AM EDT

* AT 1038 AM 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 10 TO 
  12 MILES WEST OF LEWISTON AND NIAGARA FALLS...AND WAS MOVING 
  EAST AT 40 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  LEWISTON AT 1050 AM EDT...
  NIAGARA FALLS AT 1055 AM EDT...
  SANBORN AT 1100 AM EDT...
  PENDLETON AT 1110 AM EDT...
  RAPIDS AT 1115 AM EDT...
  AKRON AT 1125 AM EDT...

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN BUFFALO.

LAT...LON 4327 7935 4310 7938 4297 7903 4296 7847
          4324 7847

$$

WCH

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 18, 10:24 AM EDT	Special Marine Warning	BUF		51 min
Apr 18, 10:24 AM EDT	Special Marine Warning	BUF		51 min
Apr 18, 10:24 AM EDT	Special Marine Warning	BUF		51 min
Apr 18, 10:24 AM EDT	Special Marine Warning	BUF		51 min
Apr 18, 11:14 AM EDT	Severe Thunderstorm Warning	BUF	Genesee, Orleans	61 min
Apr 18, 11:15 AM EDT	Special Marine Warning	BUF		60 min
Apr 18, 11:30 AM EDT	Severe Thunderstorm Warning	BUF	Wyoming	60 min
Apr 18, 11:53 AM EDT	Severe Thunderstorm Warning	BUF	Livingston, Monroe	52 min
Apr 18, 12:15 PM EDT	Special Marine Warning	BUF		60 min
Apr 18, 12:19 PM EDT	Severe Thunderstorm Warning	BUF	Ontario	56 min
Apr 18, 12:34 PM EDT	Severe Thunderstorm Warning	BUF	Wayne	56 min
Apr 18, 12:42 PM EDT	Severe Thunderstorm Warning	BUF	Livingston	33 min
Apr 18, 1:03 PM EDT	Severe Thunderstorm Warning	BUF	Allegany	42 min
Apr 18, 1:15 PM EDT	Special Marine Warning	BUF		60 min

Nearby

Severe Thunderstorm Warnings in New York, 2004 Every severe thunderstorm warning in 2004

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.