Alert archive / Maine / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 12, NWS Caribou, ME

July 10, 2018Washington County, Maine

NWS Caribou, ME issued this severe thunderstorm warning at Jul 10, 2018, 5:00 PM EDT for Washington County, Maine. It was in force for 30 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 10, 2018, 5:00 PM EDT (21:00 UTC)
Expired
Jul 10, 2018, 5:30 PM EDT
In force
30 min
Issued by
NWS Caribou, ME
Area
Storm-based polygon
Hail
1.25 in
Wind
70.0 mph

County Washington County, ME

The radar

The Caribou radar (KCBW), 120 km from the middle of the area, began a volume at 20:58 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.

The nearest sounding before it

Caribou, ME (KCAR), launched 12:00Z, 9.0 hours before the alert went out and 213 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, Caribou, ME at 12:00Z on 2018-07-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 62 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, Caribou, ME at 12:00Z on 2018-07-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 7 square meters per square second.1939587897Sfc1 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
62 J/kg
Mixed-layer CIN
-186 J/kg
Mixed-layer LCL
1148 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
7 m²/s²
0-3 km storm-relative helicity
70 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Caribou, ME wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 10, 4:59 PM EDT, 1 minute earlier.

Area forecast discussion, Jul 10, 4:59 PM EDT, 1 minute before
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Hazardous weather outlook, Jul 10, 9:24 AM EDT, 7 hours 36 minutes before
Hazardous Weather Outlook...UPDATED
National Weather Service Caribou ME
924 AM EDT Tue Jul 10 2018

MEZ001>003-111330-
Northwest Aroostook-Northeast Aroostook-Northern Somerset-
924 AM EDT Tue Jul 10 2018

This Hazardous Weather Outlook is for Far Northern Maine and West
Central Maine.

.DAY ONE...Today and Tonight.

Thunderstorms are expected to develop later this morning into the
afternoon. A few storms have the potential to produce strong wind
gusts and hail.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Hazardous Weather is not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

MEZ004>006-010-011-015>017-031-032-111330-
Northern Piscataquis-Northern Penobscot-Southeast Aroostook-
Central Piscataquis-Central Penobscot-Southern Penobscot-
Interior Hancock-Central Washington-Southern Piscataquis-
Northern Washington-
924 AM EDT Tue Jul 10 2018

This Hazardous Weather Outlook is for East Central Maine, Eastern
Maine, Interior DownEast Maine, North Central Maine and Northern
Maine.

.DAY ONE...Today and Tonight.

...Strong Thunderstorms are expected this afternoon...

Thunderstorms are expected to develop later this morning into the
afternoon. Some thunderstorms have the potential to produce strong
wind gusts up to 50 mph and hail.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Hazardous weather is not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

MEZ029-030-111330-
Coastal Hancock-Coastal Washington-
924 AM EDT Tue Jul 10 2018

This Hazardous Weather Outlook is for Coastal DownEast Maine.

.DAY ONE...Today and Tonight.

Thunderstorms are expected to develop this afternoon. Some storms
may contain gusty winds and dangerous cloud to ground lightning this
afternoon.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Long period swell from a tropical system that will become post
tropical as it passes east of the area Thursday will produce long
period swell and the possibility of high surf around the times of
high tide Thursday.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

ANZ050>052-111330-
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-
924 AM EDT Tue Jul 10 2018

This Hazardous Weather Outlook is for Atlantic Coastal Waters.

.DAY ONE...Today and Tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Long period swell from a tropical system that will become post
tropical as it passes east of the area Thursday will produce long
period swell.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

Hewitt

In the hours before

Local storm report, Jul 10, 1:48 PM EDT, 3 hours 12 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CARIBOU ME
148 PM EDT TUE JUL 10 2018

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

0137 PM     HAIL             2 NE SHIRLEY            45.38N 69.60W
07/10/2018  E1.00 INCH       PISCATAQUIS        ME   DEPT OF HIGHWAYS

            SHIRLEY DOT WORKER REPORTS HAIL UP TO ONE
            INCH IN DIAMETER.

&&

FMK
Local storm report, Jul 10, 2:10 PM EDT, 2 hours 50 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CARIBOU ME
210 PM EDT TUE JUL 10 2018

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

0125 PM     HAIL             DAIGLE                  47.19N 68.46W
07/10/2018  E1.00 INCH       AROOSTOOK          ME   PUBLIC

            NEW CANADA TOWN OFFICE REPORTS NICKLE AND
            QUARTER SIZED HAIL.

&&

FMK
Special weather statement, Jul 10, 4:00 PM EDT, 1 hour before
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Local storm report, Jul 10, 4:17 PM EDT, 43 minutes before
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Local storm report, Jul 10, 4:27 PM EDT, 33 minutes before
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Local storm report, Jul 10, 4:28 PM EDT, 32 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 10, 12:53 PM EDTSpecial Weather StatementCARAroostook37 min
Jul 10, 1:12 PM EDTSpecial Weather StatementCAR18 min
Jul 10, 1:18 PM EDTSevere Thunderstorm WarningCARAroostook27 min
Jul 10, 1:30 PM EDTSevere Thunderstorm WarningCARSomerset30 min
Jul 10, 1:32 PM EDTSevere Thunderstorm WarningCARPenobscot, Piscataquis43 min
Jul 10, 2:15 PM EDTSevere Thunderstorm WarningCARPenobscot, Piscataquis32 min
Jul 10, 3:38 PM EDTSevere Thunderstorm WarningCARHancock, Penobscot37 min
Jul 10, 3:42 PM EDTSevere Thunderstorm WarningCARPenobscot33 min
Jul 10, 4:00 PM EDTSpecial Weather StatementCAR45 min
Jul 10, 4:16 PM EDTSevere Thunderstorm WarningCARHancock, Washington44 min

Nearby

Severe Thunderstorm Warnings in Maine, 2018Every severe thunderstorm warning in 2018

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.