Alert archive / Maine / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 23, NWS Caribou, ME

July 18, 2016Penobscot County, Maine

NWS Caribou, ME issued this severe thunderstorm warning at Jul 18, 2016, 3:21 PM EDT for Penobscot County, Maine. It was in force for 54 min. 11 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, 3:21 PM EDT (19:21 UTC)
Expired: Jul 18, 2016, 4:15 PM EDT
In force: 54 min
Issued by: NWS Caribou, ME
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Penobscot County, ME

The radar

The Portland,ME radar (KGYX), 138 km from the middle of the area, began a volume at 19:23 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, 3:25 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, 3:30 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.
Jul 18, 3:57 PM EDT	TSTM WND DMG	1 E Etna, ME	APPROX. 30 TREES DOWN ON A CAMP ON THE EAST SIDE OF ETNA LAKE. TIME ESTIMATED BY RADAR.
Jul 18, 4:12 PM EDT	TSTM WND DMG	1 N Brewer, ME	POLICE REPORT MANY BRANCHES DOWN ON STATE STREET. TIME ESTIMATED FROM RADAR.
Jul 18, 4:12 PM EDT	TSTM WND DMG	1 Nne Brewer, ME	FIRE DEPARTMENT REPORTS TREE DOWN ON STATE STREET.
Jul 18, 4:15 PM EDT	TSTM WND DMG	1 Sse Brewer, ME	MANY TREES DOWN AROUND TOWN. TIME ESTIMATED FROM RADAR.

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 10 storm reports to this severe thunderstorm warning; the first came 4 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, 7.4 hours before the alert went out and 138 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.

834 
WUUS51 KCAR 181921
SVRCAR
MEC019-182015-
/O.NEW.KCAR.SV.W.0023.160718T1921Z-160718T2015Z/

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

THE NATIONAL WEATHER SERVICE IN CARIBOU MAINE HAS ISSUED A

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

* UNTIL 415 PM EDT

* AT 321 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR SKOWHEGAN...
  MOVING EAST AT 40 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...BUCKSPORT...NEWPORT...ORONO...BREWER...
  HAMPDEN...HERMON...CORINTH...VEAZIE...KENDUSKEAG...GLENBURN...
  ORRINGTON...LEVANT...CARMEL...CORINNA...NEWBURGH...PLYMOUTH...
  ETNA AND STETSON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4472 6920 4473 6927 4480 6929 4482 6928
      4492 6931 4496 6872 4469 6873 4466 6874
      4466 6877 4468 6876 4469 6879 4468 6881
      4470 6885 4465 6919
TIME...MOT...LOC 1921Z 269DEG 36KT 4481 6968 

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

MIGNONE

2 follow-up statements

336 
WWUS51 KCAR 181948
SVSCAR

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

MEC019-182015-
/O.CON.KCAR.SV.W.0023.000000T0000Z-160718T2015Z/
PENOBSCOT ME-
348 PM EDT MON JUL 18 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR SOUTHWESTERN PENOBSCOT COUNTY...

AT 347 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER
NEWPORT...MOVING EAST AT 40 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...BUCKSPORT...NEWPORT...ORONO...BREWER...HAMPDEN...
HERMON...CORINTH...VEAZIE...KENDUSKEAG...GLENBURN...ORRINGTON...
LEVANT...CARMEL...CORINNA...NEWBURGH...PLYMOUTH...ETNA AND STETSON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4472 6920 4473 6927 4480 6929 4482 6928
      4492 6931 4496 6872 4469 6873 4466 6874
      4466 6877 4468 6876 4469 6879 4468 6881
      4470 6885 4465 6919
TIME...MOT...LOC 1947Z 269DEG 36KT 4481 6930 

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

MIGNONE

659 
WWUS51 KCAR 182013
SVSCAR

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

MEC019-182023-
/O.EXP.KCAR.SV.W.0023.000000T0000Z-160718T2015Z/
PENOBSCOT ME-
413 PM EDT MON JUL 18 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN PENOBSCOT COUNTY
WILL EXPIRE AT 415 PM EDT...
        
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE AREA.
THEREFORE...THE WARNING WILL BE ALLOWED TO EXPIRE.

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

LAT...LON 4472 6920 4473 6927 4480 6929 4482 6928
      4492 6931 4496 6872 4469 6873 4466 6874
      4466 6877 4468 6876 4469 6879 4468 6881
      4470 6885 4465 6919
TIME...MOT...LOC 2011Z 269DEG 36KT 4481 6930 

$$

FARRAR

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 44 minutes earlier.

Area forecast discussion, Jul 18, 12:37 PM EDT, 2 hours 44 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, 4 hours 8 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

Local storm report, Jul 18, 9:27 AM EDT, 5 hours 54 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, 2:58 PM EDT	Severe Thunderstorm Warning	CAR	Penobscot, Piscataquis	62 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, 3:34 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.