Severe Thunderstorm Watch 300

Issued

Jun 21, 2021, 1:11 PM EDT (17:11 UTC)

Expired

Jun 21, 2021, 10:45 PM EDT

In force

10 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Burlington radar (KCXX), 102 km from the middle of the area, began a volume at 17:14 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.

Two or more tornadoes

20%

One or more EF2 to EF5 tornadoes

10%

Ten or more severe wind reports

70%

One or more gusts of 65 knots or more

10%

Ten or more severe hail reports

60%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 1046 Severe potential...watch likelyJun 21, 12:31 PM EDT
• Mesoscale Discussion 1049 Severe thunderstorm watch 300Jun 21, 3:35 PM EDT
• Mesoscale Discussion 1056 Severe thunderstorm watch 300...303Jun 21, 6:50 PM EDT
• Mesoscale Discussion 1059 Severe thunderstorm watch 300...303...304Jun 21, 9:23 PM EDT

375 
WWUS20 KWNS 211710
SEL0  
SPC WW 211710
NHZ000-NYZ000-VTZ000-220100-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 300
NWS Storm Prediction Center Norman OK
110 PM EDT Mon Jun 21 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Northern New Hampshire
  Central and Eastern New York
  Vermont

* Effective this Monday afternoon and evening from 110 PM until
  900 PM EDT.

* Primary threats include...
  Scattered large hail likely with isolated very large hail events
    to 2 inches in diameter possible
  Scattered damaging wind gusts to 70 mph likely
  A tornado or two possible

SUMMARY...Thunderstorms are expected to intensify rapidly this
afternoon across the watch area.  Scattered severe storms capable of
damaging wind gusts and large hail will be possible.  An isolated
tornado cannot be ruled out.

The severe thunderstorm watch area is approximately along and 75
statute miles north and south of a line from 25 miles west of
Syracuse NY to 35 miles north northeast of Berlin NH. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU0).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A Severe Thunderstorm Watch means conditions are
favorable for severe thunderstorms in and close to the watch area.
Persons in these areas should be on the lookout for threatening
weather conditions and listen for later statements and possible
warnings. Severe thunderstorms can and occasionally do produce
tornadoes.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 299...

AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
26035.

...Hart

Severe Thunderstorm Watches in New York, 2021Severe Thunderstorm Watches in Vermont, 2021Severe Thunderstorm Watches in New Hampshire, 2021Every severe thunderstorm watch in 2021

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.