Alert archive / New York / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 71, NWS Albany, NY

July 21, 2010Dutchess County, New York; Northwest Hills Planning Region, Connecticut

NWS Albany, NY issued this severe thunderstorm warning at Jul 21, 2010, 4:50 PM EDT for Dutchess County, New York; Northwest Hills Planning Region, Connecticut. It was in force for 55 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: Jul 21, 2010, 4:50 PM EDT (20:50 UTC)
Expired: Jul 21, 2010, 5:45 PM EDT
In force: 55 min
Issued by: NWS Albany, NY
Area: Storm-based polygon

Counties Northwest Hills Planning Region, CT, Dutchess County, NY

The radar

The Albany radar (KENX), 99 km from the middle of the area, began a volume at 20:52 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 21, 11:27 AM EDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 8.8 hours before the alert went out and 102 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: 146 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 945 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 104 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Albany, NY wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 21, 4:15 PM EDT, 35 minutes earlier.

Area forecast discussion, Jul 21, 4:15 PM EDT, 35 minutes before

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Hazardous weather outlook, Jul 21, 11:31 AM EDT, 5 hours 19 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE ALBANY NY
1131 AM EDT WED JUL 21 2010

CTZ001-013-MAZ001-025-NYZ032-033-038>043-047>054-058>061-063>066-
082>084-VTZ013>015-221115-
NORTHERN LITCHFIELD-SOUTHERN LITCHFIELD-NORTHERN BERKSHIRE-
SOUTHERN BERKSHIRE-NORTHERN HERKIMER-HAMILTON-SOUTHERN HERKIMER-
SOUTHERN FULTON-MONTGOMERY-NORTHERN SARATOGA-NORTHERN WARREN-
NORTHERN WASHINGTON-SCHOHARIE-WESTERN SCHENECTADY-
EASTERN SCHENECTADY-SOUTHERN SARATOGA-WESTERN ALBANY-EASTERN ALBANY-
WESTERN RENSSELAER-EASTERN RENSSELAER-WESTERN GREENE-EASTERN GREENE-
WESTERN COLUMBIA-EASTERN COLUMBIA-WESTERN ULSTER-EASTERN ULSTER-
WESTERN DUTCHESS-EASTERN DUTCHESS-NORTHERN FULTON-SOUTHEAST WARREN-
SOUTHERN WASHINGTON-BENNINGTON-WESTERN WINDHAM-EASTERN WINDHAM-
1131 AM EDT WED JUL 21 2010

...SEVERE THUNDERSTORM WATCH 507 IN EFFECT UNTIL 8 PM EDT THIS
EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWESTERN
CONNECTICUT...WESTERN MASSACHUSETTS...EAST CENTRAL NEW YORK AND
SOUTHERN VERMONT.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   SEVERE THUNDERSTORM WATCH.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

THERE IS A CHANCE OF THUNDERSTORMS FRIDAY INTO SATURDAY NIGHT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS REQUESTED.  WEATHER SPOTTERS ARE ENCOURAGED
TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD
OPERATING PROCEDURES.

FOR THE LATEST UPDATES...PLEASE VISIT OUR WEBPAGE AT
WWW.WEATHER.GOV/ALBANY

In the hours before

Special weather statement, Jul 21, 3:47 PM EDT, 1 hour 3 minutes before

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Special weather statement, Jul 21, 3:49 PM EDT, 1 hour 1 minute before

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Local storm report, Jul 21, 4:00 PM EDT, 50 minutes before

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Local storm report, Jul 21, 4:14 PM EDT, 36 minutes before

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Special weather statement, Jul 21, 4:14 PM EDT, 36 minutes before

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Local storm report, Jul 21, 4:22 PM EDT, 28 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 1:24 PM EDT	Severe Thunderstorm Warning	ALY	Rensselaer, Saratoga, Washington	66 min
Jul 21, 2:20 PM EDT	Severe Thunderstorm Warning	ALY	Columbia, Dutchess	55 min
Jul 21, 2:37 PM EDT	Severe Thunderstorm Warning	ALY	Greene, Ulster	53 min
Jul 21, 4:13 PM EDT	Areal Flood Advisory	ALY	Dutchess	2 hr
Jul 21, 4:27 PM EDT	Severe Thunderstorm Warning	ALY	Columbia, Dutchess, Ulster	46 min
Jul 21, 6:19 PM EDT	Severe Thunderstorm Warning	ALY	Fulton, Hamilton, Herkimer, Warren	56 min
Jul 21, 7:03 PM EDT	Severe Thunderstorm Warning	ALY	Warren, Washington	57 min
Jul 21, 7:33 PM EDT	Severe Thunderstorm Warning	ALY	Hamilton, Herkimer	57 min
Jul 21, 2:29 PM EDT	Severe Thunderstorm Warning	ALY	Bennington, Windham	34 min
Jul 21, 3:11 PM EDT	Severe Thunderstorm Warning	ALY	Northwest Hills Planning Region	52 min
Jul 21, 3:32 PM EDT	Severe Thunderstorm Warning	ALY	Northwest Hills Planning Region	58 min
Jul 21, 3:39 PM EDT	Tornado Warning	ALY	Northwest Hills Planning Region	41 min

Nearby

Severe Thunderstorm Warnings in New York, 2010 Severe Thunderstorm Warnings in Connecticut, 2010 Every severe thunderstorm warning in 2010

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.