Alert archive / Maine / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 20, NWS Caribou, ME

July 18, 2016Penobscot County, Piscataquis County, Maine

NWS Caribou, ME issued this severe thunderstorm warning at Jul 18, 2016, 2:58 PM EDT for Penobscot County, Piscataquis County, Maine. It was in force for 62 min. 13 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: Jul 18, 2016, 2:58 PM EDT (18:58 UTC)
Expired: Jul 18, 2016, 4:00 PM EDT
In force: 62 min
Issued by: NWS Caribou, ME
Area: Storm-based polygon
Hail: 1.75 in
Wind: 60.0 mph

Counties Penobscot County, ME, Piscataquis County, ME

The radar

The Portland,ME radar (KGYX), 146 km from the middle of the area, began a volume at 19:01 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
Jul 18, 3:10 PM EDT	HAIL 0.5	Corinna, ME	.
Jul 18, 3:15 PM EDT	TSTM WND DMG	Dexter, ME	POLES REPORTED DOWN ON WATER STREET. TIME ESTIMATED FROM RADAR.
Jul 18, 3:15 PM EDT	TSTM WND DMG	Dexter, ME	TREES AND POWER LINES DOWN. TIME ESTIMATED FROM RADAR.
Jul 18, 3:20 PM EDT	TSTM WND DMG	1 Nnw Stetson, ME	TREES DOWN ON ROAD FROM EXETER TO STETSON. REPORT FROM WABI SOCIAL MEDIA. TIME ESTIMATED FROM RADAR.
Jul 18, 3:20 PM EDT	TSTM WND DMG	Exeter, ME	TWO TREES DOWN, INCL A 60-FOOT MAPLE.
Jul 18, 3:25 PM EDT	TSTM WND DMG	1 Nnw Stetson, ME	TREES DOWN ON ROAD FROM EXETER TO STETSON. REPORT FROM WABI SOCIAL MEDIA. TIME ESTIMATED FROM RADAR.
Jul 18, 3:25 PM EDT	TSTM WND DMG	Exeter, ME	EMERA REPORTS LINES DOWN IN EXETER.
Jul 18, 3:30 PM EDT	HAIL 0.5	Kenduskeag, ME	.
Jul 18, 3:38 PM EDT	TSTM WND DMG	4 W Kenduskeag, ME	TOWN OFFICE REPORTS TREE DOWN ON AVENUE ROAD.
Jul 18, 3:40 PM EDT	TSTM WND DMG	1 S Kenduskeag, ME	TOWN OFFICE REPORTS TREES DOWN ON KENDUSKEAG-LEVANT ROAD.
Jul 18, 3:40 PM EDT	TSTM WND DMG	Corinna, ME	MULTIPLE TREES DOWN ON ROUTE 7 GOING INTO CORINNA. TIME ESTIMATED FROM RADAR.
Jul 18, 3:47 PM EDT	TSTM WND DMG	4 Ese Glenburn, ME	TREES DOWN AT PUSHAW LAKE CAMPGROUND. TWO CAMPERS TOTALLED AND A SIGN WITH 2-INCH METAL SUPPORTS WAS BENT BACKWARD.
Jul 18, 3:47 PM EDT	TSTM WND DMG	4 Ese Glenburn, ME	EMERA REPORTS TREES AND LINES DOWN NEAR PUSHAW LAKE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 11 storm reports to this severe thunderstorm warning; the first came 17 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

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 18, 11:12 AM EDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Gray, ME (KGYX), launched 12:00Z, 7.0 hours before the alert went out and 146 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: 24 J/kg
Mixed-layer CIN: -141 J/kg
Mixed-layer LCL: 1173 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 219 m²/s²
0-3 km storm-relative helicity: 216 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

625 
WUUS51 KCAR 181858
SVRCAR
MEC019-021-182000-
/O.NEW.KCAR.SV.W.0020.160718T1858Z-160718T2000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CARIBOU ME
258 PM EDT MON JUL 18 2016

THE NATIONAL WEATHER SERVICE IN CARIBOU MAINE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL PISCATAQUIS COUNTY IN NORTH CENTRAL MAINE...
  SOUTHWESTERN PENOBSCOT COUNTY IN EAST CENTRAL MAINE...

* UNTIL 400 PM EDT

* AT 257 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED 12 MILES SOUTH
  OF KINGSBURY PLANTATION...OR 13 MILES WEST OF DEXTER...MOVING EAST
  AT 35 MPH.

  HAZARD...GOLF BALL SIZE HAIL AND 60 MPH WIND GUSTS. 

  SOURCE...RADAR INDICATED. 

  IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE INJURED. EXPECT HAIL 
           DAMAGE TO ROOFS...SIDING...WINDOWS...AND VEHICLES. EXPECT 
           WIND DAMAGE TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  BANGOR...OLD TOWN...DEXTER...NEWPORT...ORONO...HERMON...CORINTH...
  VEAZIE...KENDUSKEAG...EAST CORINTH...GLENBURN...LEVANT...CORINNA...
  HUDSON...CHARLESTON...BRADFORD...STETSON...GARLAND...
  EXETER AND HARMONY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4511 6871 4485 6871 4487 6930 4507 6936
      4505 6950 4504 6950 4503 6952 4502 6952
      4501 6961 4502 6962 4505 6963 4506 6963
TIME...MOT...LOC 1857Z 268DEG 31KT 4498 6957 

HAIL...1.75IN
WIND...60MPH
 
$$

MIGNONE

2 follow-up statements

306 
WWUS51 KCAR 181938
SVSCAR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CARIBOU ME
338 PM EDT MON JUL 18 2016

MEC021-181947-
/O.CAN.KCAR.SV.W.0020.000000T0000Z-160718T2000Z/
PISCATAQUIS ME-
338 PM EDT MON JUL 18 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL PISCATAQUIS
COUNTY IS CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF
THE WARNED AREA. THEREFORE...THE WARNING HAS BEEN CANCELLED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT FOR
EAST CENTRAL MAINE.

LAT...LON 4486 6912 4507 6910 4507 6871 4485 6871
TIME...MOT...LOC 1937Z 271DEG 48KT 4495 6890 

$$

MEC019-182000-
/O.CON.KCAR.SV.W.0020.000000T0000Z-160718T2000Z/
PENOBSCOT ME-
338 PM EDT MON JUL 18 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT
FOR SOUTHWESTERN PENOBSCOT COUNTY...

AT 337 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER
KENDUSKEAG...OR 11 MILES NORTHWEST OF BANGOR...MOVING EAST AT 35 MPH.

HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO 
         ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
BANGOR...OLD TOWN...ORONO...HERMON...CORINTH...VEAZIE...KENDUSKEAG...
EAST CORINTH...GLENBURN...LEVANT...HUDSON...CHARLESTON...BRADFORD...
STETSON...GARLAND...EXETER...ALTON AND ARGYLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4486 6912 4507 6910 4507 6871 4485 6871
TIME...MOT...LOC 1937Z 271DEG 48KT 4495 6890 

HAIL...1.00IN
WIND...60MPH
 
$$

MIGNONE

156 
WWUS51 KCAR 182001
SVSCAR

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CARIBOU ME
401 PM EDT MON JUL 18 2016

MEC019-182010-
/O.EXP.KCAR.SV.W.0020.000000T0000Z-160718T2000Z/
PENOBSCOT ME-
401 PM EDT MON JUL 18 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN PENOBSCOT COUNTY
HAS EXPIRED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF
THE WARNED AREA. THEREFORE...THE WARNING HAS BEEN ALLOWED TO EXPIRE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT FOR
EAST CENTRAL MAINE.

LAT...LON 4486 6912 4507 6910 4507 6871 4485 6871
TIME...MOT...LOC 1958Z 268DEG 31KT 4495 6890 

$$

MIGNONE

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 Caribou, ME wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 18, 12:37 PM EDT, 2 hours 21 minutes earlier.

Area forecast discussion, Jul 18, 12:37 PM EDT, 2 hours 21 minutes before

Area Forecast Discussion
National Weather Service Caribou ME
1237 PM EDT MON JUL 18 2016

.SYNOPSIS...
A strong cold front will approach from the northwest today and
will cross the area tonight. High pressure will follow with a
drier and cooler air mass Tuesday. The next cold front will cross
northern New England Friday.
&&

.NEAR TERM /THROUGH TONIGHT/...
1230 PM Update...SPC issued a severe thunderstorm watch for the
entire forecast area. The first severe storms are tracking rapidly
towards Piscataquis and Penobscot counties. Severe thunderstorm
warnings will likely be needed in these counties within the next
two hours. Damaging winds remain the number one threat with these
storms.

Previous discussion...
The main concern in the near term is the potential for severe
weather this afternoon and evening. The Storm Prediction Center has
the area from Bangor and Topsfield north in a slight risk. The
CWA is usually only in a slight risk a couple of times each
summer. A strong cold front near James Bay early this morning will
move across Quebec today and into the Saint Lawrence River Valley
by early evening. The front will then sweep across the forecast
area this evening and will move off the Downeast coast overnight.
The PWATS are around 1.5 inches this afternoon, and there will be
increasing shear this afternoon ahead of the front. There will
likely be a pre-frontal trough that moves into the western zones
during the afternoon. The main concern will be for damaging wind
gusts, but any storms that really get going with very strong
updrafts could contain large hail, but the threat of wind is
higher than that of hail. Will beef up the wording and include
damaging winds and large hail for areas inland from the coast. The
threat of severe weather will likely come to an end by 9 PM, with
the last of the showers to move off the coast around or shortly
after midnight. Cooler and drier air will gradually filter into
northern area overnight.
&&

.SHORT TERM /TUESDAY THROUGH WEDNESDAY/...
Cool Canadian high pressure builds into Maine for dry weather and
below normal temperatures.  Highs will struggle to get to 70
degrees across the Crown of Maine with low to mid 70s Downeast.
Lows will dip down in to the upper 40s across the Northern Maine
Woods Tuesday Night.  Highs will warm 5 to 7 degrees on Wednesday
but still be below normal for mid July.
&&

.LONG TERM /WEDNESDAY NIGHT THROUGH SUNDAY/...
Temperatures will warm to above normal levels on Thursday as the
surface high pressure system moves offshore.  Humidity levels will
increase as well with moisture streaming northward in the return
flow.

A cold front is forecast to pass through northern New England on
Friday with a chance for showers and thunderstorms.  The associated
upper level trough quickly pushes offshore Friday Night.  A
shortwave ridge brings drier weather back to the state on
Saturday before another upper trough approaches Maine on Sunday
for more convection.
&&

.AVIATION /18Z MONDAY THROUGH SATURDAY/...
NEAR TERM: VLIFR to IFR in low clouds and and fog early this
morning will give way to VFR by mid morning. Variable conditons
in thunderstorms in the afternoon and evening. Some storms may
have tops to 45k ft agl with sfc wind gusts to 50+ kts and large
hail. Conditions will improve to VFR tonight as the cold front
sweeps off the coast.

SHORT TERM: VFR conditions will prevail through Thursday.  MVFR
cigs and vsbys will be possible in marine stratus and fog at KBGR and
KBHB Thursday Night and in showers and thunderstorms at all TAF
sites on Friday.
&&

.MARINE...
NEAR TERM: Areas of fog will produce poor visibility at times until
the cold front sweeps off the coast late tonight. The seas will
build later today into tonight ahead of an approaching cold front to
4 to 5 ft on the coastal waters.  It appears that conditions will
remain just below sca levels.

SHORT TERM: A SCA for seas may be needed on Friday.
&&

.CAR WATCHES/WARNINGS/ADVISORIES...
ME...None.
MARINE...None.
&&

Near Term...CB/MCW
Short Term...Okulski
Long Term...Okulski
Aviation...CB/MCW/Okulski
Marine...CB/MCW/Okulski

Hazardous weather outlook, Jul 18, 11:13 AM EDT, 3 hours 45 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CARIBOU ME
1113 AM EDT MON JUL 18 2016

MEZ001>006-010-011-015>017-029>032-191515-
NORTHWEST AROOSTOOK-NORTHEAST AROOSTOOK-NORTHERN SOMERSET-
NORTHERN PISCATAQUIS-NORTHERN PENOBSCOT-SOUTHEAST AROOSTOOK-
CENTRAL PISCATAQUIS-CENTRAL PENOBSCOT-SOUTHERN PENOBSCOT-
INTERIOR HANCOCK-CENTRAL WASHINGTON-COASTAL HANCOCK-
COASTAL WASHINGTON-SOUTHERN PISCATAQUIS-NORTHERN WASHINGTON-
1113 AM EDT MON JUL 18 2016

...SEVERE THUNDERSTORM WATCH 394 IN EFFECT UNTIL 8 PM EDT THIS
EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR COASTAL DOWNEAST MAINE...EAST
CENTRAL MAINE...EASTERN MAINE...FAR NORTHERN MAINE...INTERIOR
DOWNEAST MAINE...NORTH CENTRAL MAINE...NORTHERN MAINE AND WEST
CENTRAL MAINE.

.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...TUESDAY THROUGH SUNDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

ANZ050>052-191515-
COASTAL WATERS FROM EASTPORT, ME TO SCHOODIC POINT, ME OUT 25 NM-
COASTAL WATERS FROM SCHOODIC POINT, ME TO STONINGTON, ME OUT 25 NM-
INTRA COASTAL WATERS FROM SCHOODIC POINT, ME TO STONINGTON, ME-
1113 AM EDT MON JUL 18 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

AREAS OF FOG WILL PRODUCE LOCALLY POOR VISIBILITY THROUGH THIS
EVENING.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

In the hours before

Special weather statement, Jul 18, 9:05 AM EDT, 5 hours 53 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CARIBOU ME
905 AM EDT MON JUL 18 2016

MEZ001>006-010-011-015-031-032-181615-
NORTHWEST AROOSTOOK-NORTHEAST AROOSTOOK-NORTHERN SOMERSET-
NORTHERN PISCATAQUIS-NORTHERN PENOBSCOT-SOUTHEAST AROOSTOOK-
CENTRAL PISCATAQUIS-CENTRAL PENOBSCOT-SOUTHERN PENOBSCOT-
SOUTHERN PISCATAQUIS-NORTHERN WASHINGTON-
INCLUDING THE CITIES OF...ALLAGASH...CLAYTON LAKE...MADAWASKA...
FORT KENT...FRENCHVILLE...PRESQUE ISLE...CARIBOU...VAN BUREN...
MARS HILL...BAKER LAKE...BILLY-JACK DEPOT...BAXTER ST PARK...
CHAMBERLAIN LAKE...CHURCHILL DAM...MOUNT KATAHDIN...MILLINOCKET...
EAST MILLINOCKET...PATTEN...MEDWAY...HOULTON...HODGDON...
SHERMAN...SMYRNA MILLS...GREENVILLE...MONSON...BLANCHARD...
LINCOLN...HOWLAND...SPRINGFIELD...BANGOR...BREWER...ORONO...
OLD TOWN...DOVER-FOXCROFT...MILO...GUILFORD...DANFORTH...
VANCEBORO...TOPSFIELD
905 AM EDT MON JUL 18 2016

...SEVERE WEATHER POSSIBLE THIS AFTERNOON...

SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP AFTER 2 PM THIS
AFTERNOON ACROSS THE NORTH WOODS. STORMS WILL MOVE SOUTH AND EAST
DURING THE AFTERNOON INTO THE EVENING HOURS AHEAD OF A COLD FRONT.
SOME THUNDERSTORMS MAY BE SEVERE WITH DAMAGING WINDS THE MAIN
THREAT. A FEW STORMS MAY ALSO PRODUCE LARGE HAIL.

FREQUENT LIGHTNING WILL OCCUR WITH ALL STORMS SO IF YOU HAVE
OUTDOOR ACTIVITIES PLANNED FOR TODAY, LISTEN TO THE LATEST WEATHER
INFORMATION AND POSSIBLE WARNINGS.

Local storm report, Jul 18, 9:27 AM EDT, 5 hours 31 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CARIBOU ME
927 AM EDT MON JUL 18 2016

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

0545 PM     TSTM WND DMG     NEWPORT                 44.84N 69.28W
07/17/2016                   PENOBSCOT          ME   DEPT OF HIGHWAYS

            ONE TREE DOWN IN NEWPORT, RELAYED FROM TOWN
            PUBLIC WORKS. TIME ESTIMATED FROM RADAR.

&&

FMK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 5:37 AM EDT	Dense Fog Advisory	CAR	Aroostook, Hancock, Penobscot, Piscataquis, Somerset, Washington	2 hr
Jul 18, 2:06 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot, Piscataquis	54 min
Jul 18, 3:03 PM EDT	Severe Thunderstorm Warning	CAR	Hancock, Penobscot, Piscataquis, Washington	57 min
Jul 18, 3:20 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook	55 min
Jul 18, 3:21 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot	54 min
Jul 18, 3:34 PM EDT	Severe Thunderstorm Warning	CAR	Hancock, Penobscot, Washington	56 min
Jul 18, 3:43 PM EDT	Severe Thunderstorm Warning	CAR	Aroostook, Penobscot, Washington	47 min
Jul 18, 4:27 PM EDT	Severe Thunderstorm Warning	CAR	Hancock, Penobscot, Washington	63 min
Jul 18, 4:37 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot	23 min
Jul 18, 5:00 PM EDT	Severe Thunderstorm Warning	CAR	Hancock, Penobscot	30 min
Jul 18, 5:48 PM EDT	Tornado Warning Tornado observed	CAR	Aroostook	27 min
Jul 18, 6:13 PM EDT	Tornado Warning Tornado observed	CAR	Aroostook	32 min
Jul 18, 6:48 PM EDT	Special Marine Warning	CAR		27 min

Nearby

Severe Thunderstorm Warnings in Maine, 2016 Every severe thunderstorm warning in 2016

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.