Alert archive / Maine / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 522

July 23, 20026 states

The Storm Prediction Center issued this severe thunderstorm watch at Jul 23, 2002, 11:55 AM EDT for 6 states. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued: Jul 23, 2002, 11:55 AM EDT (15:55 UTC)
Expired: Jul 23, 2002, 7:00 PM EDT
In force: 7 hr
Issued by: the Storm Prediction Center

All 51 counties

Berkshire County, MA, Essex County, MA, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Middlesex County, MA, Norfolk County, MA, Suffolk County, MA, Worcester County, MA, Androscoggin County, ME, Cumberland County, ME, Franklin County, ME, Hancock County, ME, Kennebec County, ME, Knox County, ME, Lincoln County, ME, Oxford County, ME, Penobscot County, ME, Sagadahoc County, ME, Somerset County, ME, Waldo County, ME, Washington County, ME, York County, ME, Belknap County, NH, Carroll County, NH, Cheshire County, NH, Coos County, NH, Grafton County, NH, Hillsborough County, NH, Merrimack County, NH, Rockingham County, NH, Strafford County, NH, Sullivan County, NH, Albany County, NY, Columbia County, NY, Delaware County, NY, Dutchess County, NY, Greene County, NY, Rensselaer County, NY, Saratoga County, NY, Schenectady County, NY, Schoharie County, NY, Sullivan County, NY, Ulster County, NY, Washington County, NY, Providence County, RI, Bennington County, VT, Orange County, VT, Rutland County, VT, Windham County, VT, Windsor County, VT

The radar

The Portland,ME radar (KGYX), 153 km from the middle of the area, began a volume at 15:58 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.

Warnings issued inside it

21 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Jul 23, 12:20 PM EDT	Severe Thunderstorm Warning	ALY	Saratoga	40 min
Jul 23, 12:30 PM EDT	Severe Thunderstorm Warning	BTV	Rutland	45 min
Jul 23, 12:40 PM EDT	Severe Thunderstorm Warning	ALY	Albany	35 min
Jul 23, 12:43 PM EDT	Severe Thunderstorm Warning	ALY	Rensselaer	62 min
Jul 23, 1:17 PM EDT	Severe Thunderstorm Warning	ALY	Berkshire	43 min
Jul 23, 1:24 PM EDT	Severe Thunderstorm Warning	ALY	Windham	66 min
Jul 23, 1:31 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Kennebec, Somerset	59 min
Jul 23, 1:32 PM EDT	Severe Thunderstorm Warning	GYX	Franklin, Kennebec, Somerset	58 min
Jul 23, 1:32 PM EDT	Severe Thunderstorm Warning	ALY	Columbia	43 min
Jul 23, 1:44 PM EDT	Severe Thunderstorm Warning	ALY	Greene, Ulster	61 min
Jul 23, 2:04 PM EDT	Severe Thunderstorm Warning	ALY	Berkshire	41 min
Jul 23, 2:10 PM EDT	Severe Thunderstorm Warning	GYX	Waldo	50 min
Jul 23, 2:20 PM EDT	Severe Thunderstorm Warning	ALY	Dutchess	55 min
Jul 23, 2:22 PM EDT	Severe Thunderstorm Warning	BGM	Sullivan	38 min
Jul 23, 2:25 PM EDT	Severe Thunderstorm Warning	CAR	Washington	65 min
Jul 23, 2:43 PM EDT	Severe Thunderstorm Warning	ALY	Ulster	32 min
Jul 23, 2:47 PM EDT	Severe Thunderstorm Warning	CAR	Hancock	58 min
Jul 23, 2:50 PM EDT	Severe Thunderstorm Warning	GYX	Merrimack	55 min
Jul 23, 3:10 PM EDT	Severe Thunderstorm Warning	GYX	Cumberland	65 min
Jul 23, 3:14 PM EDT	Severe Thunderstorm Warning	GYX	Rockingham	61 min
Jul 23, 3:34 PM EDT	Severe Thunderstorm Warning	GYX	Strafford	26 min

The nearest sounding before it

Gray, ME (KGYX), launched 12:00Z, 3.9 hours before the alert went out and 152 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: 330 J/kg
Mixed-layer CIN: -132 J/kg
Mixed-layer LCL: 1272 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 98 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.

000 
WWUS20 KWNS 231556
SEL2  
SPC WW 231555
CTZ000-MAZ000-MEZ000-NHZ000-NYZ000-RIZ000-VTZ000-CWZ000-232300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 522
STORM PREDICTION CENTER NORMAN OK
1155 AM EDT TUE JUL 23 2002

THE STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

   CONNECTICUT                        
   MASSACHUSETTS                      
   MAINE                              
   NEW HAMPSHIRE                      
   EASTERN NEW YORK                           
   RHODE ISLAND                       
   SOUTHERN VERMONT                            
   COASTAL WATERS                     

EFFECTIVE THIS TUESDAY MORNING AND EVENING FROM 1155 AM UNTIL 700
PM EDT.

HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 105 STATUTE MILES
EAST AND WEST OF A LINE FROM 50 MILES EAST OF MONTICELLO NEW YORK
TO 70 MILES EAST NORTHEAST OF GREENVILLE MAINE.

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.


DISCUSSION...STRONG HEATING WILL ALLOW TEMPERATURES TO INCREASE
INTO THE MID 80S/LOWER 90S EARLY THIS AFTERNOON AHEAD OF
APPROACHING COLD FRONT.  GIVEN DEW POINTS IN THE LOWER 70S...THE
AIR MASS WILL THEREFORE REMAIN VERY UNSTABLE.  MODERATE WLY FLOW IN
THE LOWER TO MID LEVELS SHOULD SUPPORT LINES/BOW ECHOES WITH AN
INCREASED THREAT OF DAMAGING WINDS.


AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1 INCH EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. 
A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.  MEAN STORM MOTION
VECTOR 27035.


...EVANS

414,0755 454,0702 454,0660 414,0714

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 23, 12:15 PM EDT	Severe Thunderstorm Watch	SPC		7 hr

Nearby

Severe Thunderstorm Watches in Maine, 2002 Severe Thunderstorm Watches in New York, 2002 Severe Thunderstorm Watches in New Hampshire, 2002 Every severe thunderstorm watch in 2002

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.