Alert archive / Maine / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 82, NWS Gray, ME

July 20, 2013Knox County, Lincoln County, Waldo County, Maine

NWS Gray, ME issued this severe thunderstorm warning at Jul 20, 2013, 5:21 PM EDT for Knox County, Lincoln County, Waldo County, Maine. It was in force for 24 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 20, 2013, 5:21 PM EDT (21:21 UTC)
Expired
Jul 20, 2013, 5:45 PM EDT
In force
24 min
Issued by
NWS Gray, ME
Area
Storm-based polygon

Counties Knox County, ME, Lincoln County, ME, Waldo County, ME

The radar

The Portland,ME radar (KGYX), 86 km from the middle of the area, began a volume at 21:20 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.

IssuedProductOfficeLasted
Jul 20, 2:08 PM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Chatham, MA (KCHH), launched 12:00Z, 9.4 hours before the alert went out and 286 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, Chatham, MA at 12:00Z on 2013-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2810 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, Chatham, MA at 12:00Z on 2013-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 83 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
2810 J/kg
Mixed-layer CIN
-78 J/kg
Mixed-layer LCL
825 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
83 m²/s²
0-3 km storm-relative helicity
101 m²/s²
Significant tornado parameter
0.8
Supercell composite
9.2

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 Gray, ME wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 20, 5:08 PM EDT, 13 minutes earlier.

Area forecast discussion, Jul 20, 5:08 PM EDT, 13 minutes before
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Hazardous weather outlook, Jul 20, 3:09 PM EDT, 2 hours 12 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GRAY ME
309 PM EDT SAT JUL 20 2013

MEZ007>009-012>014-NHZ001-002-210115-
NORTHERN OXFORD-NORTHERN FRANKLIN-CENTRAL SOMERSET-SOUTHERN OXFORD-
SOUTHERN FRANKLIN-SOUTHERN SOMERSET-NORTHERN COOS-SOUTHERN COOS-
309 PM EDT SAT JUL 20 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MAINE AND NORTHERN
NEW HAMPSHIRE.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

SHOWERS AND THUNDERSTORMS ARE LIKELY THIS AFTERNOON. SOME
THUNDERSTORMS COULD PRODUCE DAMAGING WINDS...SMALL HAIL AND
FREQUENT LIGHTNING.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE ENCOURAGED TO CALL WITH ANY REPORTS OF SEVERE WEATHER.

ANZ150>154-210115-
STONINGTON ME TO PORT CLYDE ME OUT TO 25 NM-PENOBSCOT BAY-
PORT CLYDE ME TO CAPE ELIZABETH ME OUT TO 25 NM-CASCO BAY-
CAPE ELIZABETH ME TO MERRIMACK RIVER MA OUT TO 25 NM-
309 PM EDT SAT JUL 20 2013

...SEVERE THUNDERSTORM WATCH 426 IN EFFECT UNTIL 9 PM EDT THIS
EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CASCO BAY...PENOBSCOT
BAY...THE COASTAL WATERS FROM CAPE ELIZABETH ME TO MERRIMACK RIVER
MA...THE COASTAL WATERS FROM PORT CLYDE ME TO CAPE ELIZABETH ME AND
THE COASTAL WATERS FROM STONINGTON ME TO PORT CLYDE ME.

.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...SUNDAY THROUGH FRIDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

MEZ018>028-NHZ003>010-013-014-210115-
INTERIOR YORK-INTERIOR CUMBERLAND-ANDROSCOGGIN-KENNEBEC-
INTERIOR WALDO-COASTAL YORK-COASTAL CUMBERLAND-SAGADAHOC-LINCOLN-
KNOX-COASTAL WALDO-NORTHERN GRAFTON-NORTHERN CARROLL-
SOUTHERN GRAFTON-SOUTHERN CARROLL-SULLIVAN-MERRIMACK-BELKNAP-
STRAFFORD-INTERIOR ROCKINGHAM-COASTAL ROCKINGHAM-
309 PM EDT SAT JUL 20 2013

...SEVERE THUNDERSTORM WATCH 426 IN EFFECT UNTIL 9 PM EDT THIS
EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MAINE...CENTRAL NEW
HAMPSHIRE...NORTHERN NEW HAMPSHIRE AND SOUTHEASTERN NEW HAMPSHIRE.

.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...SUNDAY THROUGH FRIDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

In the hours before

Special weather statement, Jul 20, 3:32 PM EDT, 1 hour 49 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAY ME
332 PM EDT SAT JUL 20 2013

NHZ002-003-202000-
NORTHERN GRAFTON-SOUTHERN COOS-
332 PM EDT SAT JUL 20 2013

...STRONG THUNDERSTORMS WILL IMPACT COOS COUNTY AND GRAFTON COUNTY
THROUGH 400 PM EDT...

AT 332 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CENTERED 4 MILES WEST OF CARROLL...OR ABOUT 5
MILES NORTHEAST OF BETHLEHEM...MOVING EAST AT 40 MPH. THIS STRONG
THUNDERSTORM WILL AFFECT AREAS IN AND AROUND FOREST LAKE STATE
PARK...WHITEFIELD...BETHLEHEM...TWIN MOUNTAIN...CARROLL...
JEFFERSON...RANDOLPH...MOUNT WASHINGTON...MOOSE BROOK STATE PARK AND
SHELBURNE THROUGH 400 PM EDT.

GUSTY WINDS OF 45 TO 55 MPH CAN BE EXPECTED.

LAT...LON 4443 7117 4425 7118 4426 7172 4442 7169

KIMBLE
Special weather statement, Jul 20, 3:46 PM EDT, 1 hour 35 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAY ME
346 PM EDT SAT JUL 20 2013

MEZ022-202015-
INTERIOR WALDO-
346 PM EDT SAT JUL 20 2013

...STRONG THUNDERSTORMS WILL IMPACT WALDO COUNTY THROUGH 415 PM
EDT...

AT 346 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CENTERED OVER BROOKS...OR ABOUT 7 MILES EAST OF
THORNDIKE...MOVING NORTHEAST AT 20 MPH. THIS STRONG THUNDERSTORM WILL
AFFECT AREAS IN AND AROUND BROOKS...JACKSON...SWAN LAKE STATE PARK...
MONROE...WINTERPORT AND FRANKFORT THROUGH 415 PM EDT.

GUSTY WINDS OF 45 TO 55 MPH CAN BE EXPECTED.

LAT...LON 4463 6883 4460 6883 4449 6916 4457 6926
      4466 6914 4470 6886 4470 6884 4468 6881
      4467 6881

KIMBLE
Special weather statement, Jul 20, 4:05 PM EDT, 1 hour 16 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAY ME
405 PM EDT SAT JUL 20 2013

MEZ008-009-012>014-020>022-202045-
ANDROSCOGGIN-CENTRAL SOMERSET-INTERIOR WALDO-KENNEBEC-NORTHERN
FRANKLIN-SOUTHERN FRANKLIN-SOUTHERN OXFORD-SOUTHERN SOMERSET-
405 PM EDT SAT JUL 20 2013

...STRONG THUNDERSTORMS WILL IMPACT ANDROSCOGGIN COUNTY...SOMERSET
COUNTY...OXFORD COUNTY...FRANKLIN COUNTY...WALDO COUNTY AND KENNEBEC
COUNTY THROUGH 445 PM EDT...

AT 406 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CENTERED ALONG A LINE EXTENDING FROM NEW PORTLAND
TO TEMPLE TO 3 MILES NORTHWEST OF CANTON...OR ALONG A LINE EXTENDING
FROM 16 MILES NORTH OF FARMINGTON TO 3 MILES WEST OF FARMINGTON TO 11
MILES SOUTHEAST OF RUMFORD...MOVING EAST AT 60 MPH. THIS STRONG
THUNDERSTORM WILL AFFECT AREAS IN AND AROUND EAST WILTON...WILTON...
TEMPLE...SUMNER...STRONG...PERU...NEW VINEYARD...NEW PORTLAND...
KINGFIELD AND FARMINGTON THROUGH 445 PM EDT.

HEAVY RAINFALL CAN BE EXPECTED...WITH LOCAL PONDING IN STREETS AND
LOW-LYING AREAS.

IF YOU ARE OUTDOORS AND STORMS APPROACH YOUR LOCATION...MOVE INDOORS
OR INSIDE A VEHICLE. REMEMBER...LIGHTNING CAN STRIKE MORE THAN 5
MILES AWAY FROM THE PARENT THUNDERSTORM.

LAT...LON 4440 6932 4438 7051 4467 7029 4499 7016
      4500 6932 4474 6926 4473 6921 4472 6919
      4465 6918 4466 6914 4465 6913

MPK
Local storm report, Jul 20, 4:09 PM EDT, 1 hour 12 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE GRAY ME
409 PM EDT SAT JUL 20 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0935 PM     TSTM WND DMG     MADISON                 44.80N  69.88W
07/19/2013                   SOMERSET           ME   LAW ENFORCEMENT

            MULTIPLE TREES DOWN IN MADISON REPORTED BY SHERIIFS
            OFFICE

&&

CORRECTED EVENT TIME

EVENT NUMBER GYX1300247

BROWN
Local storm report, Jul 20, 5:16 PM EDT, 5 minutes before
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Local storm report, Jul 20, 5:18 PM EDT, 3 minutes before
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The office that day

Everything else NWS Gray, ME issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 19, 8:12 PM EDTSevere Thunderstorm WarningGYXSomerset33 min
Jul 19, 8:15 PM EDTSevere Thunderstorm WarningGYXFranklin, Oxford45 min
Jul 19, 8:56 PM EDTSevere Thunderstorm WarningGYXAndroscoggin, Franklin, Kennebec, Oxford, Somerset34 min
Jul 19, 9:26 PM EDTSevere Thunderstorm WarningGYXAndroscoggin, Franklin, Kennebec, Knox, Lincoln, Oxford and 2 more49 min
Jul 19, 9:44 PM EDTSevere Thunderstorm WarningGYXOxford, York46 min
Jul 19, 9:55 PM EDTSpecial Weather StatementGYXAndroscoggin50 min
Jul 19, 10:13 PM EDTSpecial Weather StatementGYXWaldo62 min
Jul 20, 12:27 AM EDTSpecial Weather StatementGYXCumberland48 min
Jul 20, 2:30 PM EDTSpecial Marine WarningGYX90 min
Jul 20, 3:07 PM EDTSevere Thunderstorm WarningGYXOxford53 min
Jul 20, 3:22 PM EDTSpecial Marine WarningGYX53 min
Jul 20, 3:46 PM EDTSpecial Weather StatementGYXWaldo29 min
Jul 20, 4:05 PM EDTSpecial Weather StatementGYXKennebec40 min
Jul 20, 4:36 PM EDTSevere Thunderstorm WarningGYXAndroscoggin, Franklin, Kennebec, Knox, Lincoln, Somerset and 1 more54 min
Jul 20, 5:27 PM EDTSpecial Marine WarningGYX63 min
Jul 19, 8:37 PM EDTSevere Thunderstorm WarningGYXCarroll, Coos, Grafton23 min
Jul 19, 9:03 PM EDTSevere Thunderstorm WarningGYXBelknap, Carroll, Coos, Grafton42 min
Jul 19, 10:53 PM EDTSpecial Weather StatementGYXSullivan52 min
Jul 19, 11:06 PM EDTSevere Thunderstorm WarningGYXMerrimack, Sullivan39 min
Jul 19, 11:17 PM EDTAreal Flood AdvisoryGYXMerrimack, Sullivan118 min
Jul 19, 11:39 PM EDTSpecial Weather StatementGYXBelknap, Merrimack, Strafford66 min
Jul 19, 11:51 PM EDTSevere Thunderstorm WarningGYXMerrimack, Rockingham, Strafford39 min
Jul 20, 12:03 AM EDTSevere Thunderstorm WarningGYXBelknap, Carroll, Merrimack, Strafford42 min
Jul 20, 2:04 PM EDTSpecial Weather StatementGYXRockingham26 min
Jul 20, 2:20 PM EDTSevere Thunderstorm WarningGYXCoos55 min
Jul 20, 3:32 PM EDTSpecial Weather StatementGYXCoos28 min

Nearby

Severe Thunderstorm Warnings in Maine, 2013Every severe thunderstorm warning in 2013

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.