Alert archive / Maine / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 4, NWS Caribou, ME

June 20, 2006Penobscot County, Piscataquis County, Maine

NWS Caribou, ME issued this severe thunderstorm warning at Jun 20, 2006, 4:42 PM EDT for Penobscot County, Piscataquis County, Maine. It was in force for 63 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
Jun 20, 2006, 4:42 PM EDT (20:42 UTC)
Expired
Jun 20, 2006, 5:45 PM EDT
In force
63 min
Issued by
NWS Caribou, ME
Area
Counties, with a storm outline in the text

Counties Penobscot County, ME, Piscataquis County, ME

The radar

The Caribou radar (KCBW), 101 km from the middle of the area, began a volume at 20:42 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
Jun 20, 12:12 PM EDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Gray, ME (KGYX), launched 12:00Z, 8.7 hours before the alert went out and 218 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, Gray, ME at 12:00Z on 2006-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 175 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, Gray, ME at 12:00Z on 2006-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 8 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
175 J/kg
Mixed-layer CIN
-84 J/kg
Mixed-layer LCL
1018 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
8 m²/s²
0-3 km storm-relative helicity
53 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 Jun 20, 3:39 PM EDT, 1 hour 3 minutes earlier.

Area forecast discussion, Jun 20, 3:39 PM EDT, 1 hour 3 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CARIBOU ME
339 PM EDT TUE JUN 20 2006

.SYNOPSIS...A COLD FRONT WILL SLOWLY CROSS THE REGION TONIGHT AND
MOVE EAST OF THE REGION EARLY WEDNESDAY MORNING. ANOTHER ROUND OF
SHOWERS AND THUNDERSTORMS WILL ACCOMPANY THIS FRONT AND THESE WILL
CONTINUE INTO THE OVERNIGHT HOURS. A FEW OF THESE STORMS WILL BE
STRONG TO POSSIBLY SEVERE WITH LARGE HAIL AND DAMAGING WINDS INTO
THIS EVENING. A LITTLE COOLER AND LESS HUMID AIR WILL FOLLOW THIS
FRONT FOR WEDNESDAY AS A RIDGE OF HIGH PRESSURE BEGINS TO BUILD
INTO THE AREA. THIS HIGH WILL WEAKEN WEDNESDAY NIGHT WITH A WARM
FRONT EXPECTED TO APPROACH FROM THE WEST ON THURSDAY. A COLD FRONT
WILL FOLLOW FOR LATER THURSDAY NIGHT AND FRIDAY WITH HIGH PRESSURE
EXPECTED FOR THE WEEKEND.

&&

.SHORT TERM /TONIGHT THROUGH THURSDAY NIGHT/...
BUSY WX DAY SO AM HANDLING BOTH SHORT AND LONG TERM DESKS... IN
THE SHORT TERM...MAIN CONCERN IS APPROACHING COLD FRONT AND
ASSOCIATED CONVECTION... WW#521 IN PLACE THRU 8 PM THIS EVE AND
CONVECTION HAS BEEN ON THE INCREASE LAST FEW HRS. SO FAR...JUST
SOME STRONG STORMS W/ GUSTY WNDS/HVY RAIN AND SMALL HAIL. NW ZNS
WILL BE FIRST TO QUIET DOWN LATER ON THIS AFTN AS COLD FRONT JUST
ENTERING OUR NWRN FA. SERN ZNS NOT INCLUDED IN THE WATCH W/ MARINE
ONSHORE FLOW AND COLD FRONT NOT XPCTD TO REACH THAT AREA UNTIL
LATER TNGT. THUS MAIN THREAT AREA BASICALLY IN BTWN...FROM NE
PART OF THE STATE THRU SRN AND SWRN AREAS. ANY CONVECTION SHOULD
WEAKEN LATER THIS EVE W/ LOSS OF HEATING THO SOME WEAK CONVECTION
COULD PERSIST UNTIL LATE TNGT AHEAD OF THE COLD FRONT ACROSS
CENTRAL AND SRN AREAS... WED LUKS LIKE A QUIET DAY AS RIDGE OF HGH
PRES PROGGED TO BRIEFLY BUILD OVER THE FA. THIS SHOULD RESULT IN A
LITTLE COOLER TEMPS BUT MAINLY MUCH LOWER TDS W/ TDS XPCTD TO DROP
INTO THE LOWER TO MID 50S ACROSS MUCH OF THE AREA. THIS BREAK WILL
BE SHORT LIVED HOWEVER AS NXT SYSTEM APPROACHES ON THU. WARM FRONT
XPTD TO APPROACH WRN AREAS THU AM AND MOVE ENE ACROSS THE FA ON
THU. SHOULD SEE ANOTHER INCRS IN TDS ALONG W/ SHOWERS AND PSBL
TSTMS AS THIS FEATURE LIFTS THRU...

&&

.LONG TERM /FRIDAY THROUGH TUESDAY/...
GENERALLY USED HPC GUIDANCE W/ SOME MINOR MODIFICATIONS FOR THE
XTND PERIOD... COLD FRONT TO QUICKLY FOLLOW ON THE HEELS OF THE
WARM FRONT MENTIONED ABOVE AND CROSS THE FA FROM NW TO SE ON FRI.
SOME DIFFS IN TIMING CONCERNING THIS FEATURE PER THE 12Z MODEL
SUITE BUT FRONT SHOULD MOVE JUST S AND E OF THE AREA BY FRI NGT
AND THEN STALL... ATTM...APPEARS HGH PRES WILL CONTROL OUR REGIONS WX
THRU THE WEEKEND INTO ERLY NXT WEEK BUT ANY ENERGY DEVELOPING
ALONG THIS STALLED FRONT COULD LIFT NE AND AFFECT THE AREA...SPCLY
DOWNEAST AREAS LATER IN THE WEEKEND AND ERLY NXT WEEK AND WILL
NEED TO BE MONITORED...

&&

.AVIATION...
ANOTHER ROUND OF PREVAILING VFR CONDITIONS WITH SCATTERED
RAINSHOWERS AND THUNDERSTORMS REDUCING CONDITIONS TO MVFR TO IFR
CONDITIONS. THUNDERSTORMS SHOULD MOVE THROUGH THE
CARIBOU...HOULTON...AND PRESQUE ISLE AREA EARLY EVENING WITH
SHOWERS PERSISTING TO AROUND 06 TO 09Z...AFTER WHICH TIME FOG WILL
BEGIN TO DEVELOP LOW CEILINGS WILL DEVELOP. SHORTLY AFTER SUNRISE
TOMORROW THE LOW CEILINGS WILL BEGIN TO BREAK UP...BECOMING VFR BY
MIDMORNING. IN BANGOR THUNDERSTORM WILL GET A LATER START AND WILL
PERSIST IN THE AREA UNTIL AROUND 00Z...WITH SHOWERS CONTINUING
UNTIL AROUND 09Z. FOG AND IFR CEILING WILL PERSIST UNTIL AROUND
MIDMORNING. VFR CONDITIONS ARE EXPECTED FROM MIDMORNING TOMORROW
THROUGH THURSDAY AFTERNOON.

&&

.MARINE...
WILL CONT SCA AND XTND A FEW HRS PER LATEST WNAWAVE GUIDANCE WHICH
ATTM HAS A GUD HANDLE ON SEAS... SEAS QUIET DOWN TOMORROW AM AS
HGH PRES BUILDS IN AND SHOULD REMAIN DOWN UNTIL NXT SYSTEM AFFECTS
THE WATERS LATER IN THE WEEK.

&&

.CAR WATCHES/WARNINGS/ADVISORIES...
ME...NONE.
MARINE...SMALL CRAFT ADVISORY FOR ANZ050 UNTIL 11 AM WEDNESDAY.
&&

SHORT TERM/MARINE...KHW
LONG TERM/MARINE...KHW
AVIATION...NORTON
Hazardous weather outlook, Jun 20, 12:23 PM EDT, 4 hours 19 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CARIBOU ME
1223 PM EDT TUE JUN 20 2006

ANZ050-MEZ001>006-010-011-015>017-029>032-211630-
COASTAL WATERS FROM EASTPORT ME TO STONINGTON ME OUT 25 NM-
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-
1223 PM EDT TUE JUN 20 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN AND EASTERN MAINE.

.DAY ONE...THIS AFTERNOON AND TONIGHT

A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 8 PM EDT FOR
AROOSTOOK...PENOBSCOT...AND PISCATAQUIS COUNTIES IN NORTHERN
MAINE. THE PRIMARY THREAT WILL BE FROM STRONG DAMAGING WINDS.
LARGE HAIL AND HEAVY DOWNPOURS ARE ALSO POSSIBLE. PLEASE REFER TO
THE WATCH COUNTY NOTIFICATION PRODUCT /PWMWCNCAR/ FOR MORE
DETAILED INFORMATION.

THUNDERSTORMS SHOULD LESSEN IN INTENSITY BY LATE EVENING AS THE
AIR BECOMES MORE STABLE DUE TO NOCTURNAL COOLING AND...OR A COLD
FRONT PASSAGE.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL BE NEEDED THIS AFTERNOON AND EVENING.

KHW

In the hours before

Special weather statement, Jun 20, 12:15 PM EDT, 4 hours 27 minutes before
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Special weather statement, Jun 20, 1:29 PM EDT, 3 hours 13 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CARIBOU ME
129 PM EDT TUE JUN 20 2006

MEZ001>006-010-201930-
NORTHWEST AROOSTOOK-NORTHEAST AROOSTOOK-NORTHERN SOMERSET-
NORTHERN PISCATAQUIS-NORTHERN PENOBSCOT-SOUTHEAST AROOSTOOK-
CENTRAL PISCATAQUIS-
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
129 PM EDT TUE JUN 20 2006

...THUNDERSTORMS MOVING ACROSS THE REGION...

SEVERAL BANDS OF THUNDERSTORMS WILL IMPACT THE NORTH HALF OF
MAINE...ESPECIALLY NORTH OF A MILO TO VANCEBORO LINE... THROUGH
330 PM EDT.

THE AREA OF GREATEST CONCERN IS ROUGHLY FROM GREENVILLE UP
THROUGH MOOSEHORN CROSSING AND EAGLE LAKE...TO AROUND FRENCHVILLE.

WINDS OF 40 MPH...SMALL HAIL...TORRENTIAL RAIN AND FREQUENT
LIGHTNING CAN BE EXPECTED.

IF THREATENING WEATHER APPROACHES YOUR LOCATION...MOVE TO A
PLACE OF SAFETY IMMEDIATELY.

STUREY
Special weather statement, Jun 20, 1:54 PM EDT, 2 hours 48 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CARIBOU ME
154 PM EDT TUE JUN 20 2006

MEZ002-005-201900-

PENOBSCOT AND AROOSTOOK COUNTIES...

154 PM EDT TUE JUN 20 2006

...THE NATIONAL WEATHER SERVICE OFFICE IN CARIBOU HAS ISSUED SPECIAL
WEATHER INFORMATION FOR PERSONS IN...PENOBSCOT AND AROOSTOOK
COUNTIES...

AT 152 PM EDT...DOPPLER WEATHER RADAR INDICATED A THUNDERSTORM WITH
SMALL HAIL AND GUSTY WINDS OVER MOOSEHORN CROSSING. THE STORM WAS
MOVING NORTHEAST AT 30 MPH.

LOCATIONS LIKELY TO BE AFFECTED THROUGH 300 PM EDT INCLUDE...
    MOOSEHORN CROSSING...                       OXBOW...
    MASARDIS...

THIS STORM HAS THE POTENTIAL TO PRODUCE...
    WIND GUSTS...TO NEAR 50 MPH...
    HAIL...THE SIZE OF PEAS...
    HEAVY RAINFALL...WITH SOME PONDING IN LOW LYING AREAS...
    DEADLY CLOUD-TO-GROUND LIGHTNING...5 TO 10 STRIKES PER MINUTE...

IF THREATENING SKIES APPROACH YOUR AREA...TAKE COVER IN A SHELTER OR
BUILDING. STRONG THUNDERSTORMS CAN QUICKLY BECOME SEVERE...PRODUCING
DESTRUCTIVE HAIL...DAMAGING WINDS...DEADLY LIGHTNING...AND VERY HEAVY
RAIN.

REPORT WEATHER RELATED DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY
OR YOUR COUNTY EMERGENCY MANAGEMENT. THEY WILL RELAY YOUR REPORT TO
THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN CARIBOU.

LAT...LON 4637 6894 4620 6882 4638 6800 4669 6823

STUREY
Special weather statement, Jun 20, 2:44 PM EDT, 1 hour 58 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CARIBOU ME
244 PM EDT TUE JUN 20 2006

MEZ004-010-201945-

PISCATAQUIS COUNTY...

244 PM EDT TUE JUN 20 2006

...THE NATIONAL WEATHER SERVICE OFFICE IN CARIBOU HAS ISSUED SPECIAL
WEATHER INFORMATION FOR PERSONS IN...PISCATAQUIS COUNTY...

AT 240 PM EDT...DOPPLER WEATHER RADAR INDICATED A THUNDERSTORM WITH
SMALL HAIL AND GUSTY WINDS 9 MILES NORTHWEST OF LOBSTER LAKE. THE
STORM WAS MOVING EAST NORTHEAST AT 30 MPH.

LOCATIONS LIKELY TO BE AFFECTED THROUGH 345 PM EDT INCLUDE...
    LOBSTER LAKE...       CHESUNCOOK...         TELOS LAKE...
    BAXTER ST PARK...

THIS STORM HAS THE POTENTIAL TO PRODUCE...
    HAIL...THE SIZE OF PEAS...
    STRONG AND GUSTY WINDS...UP TO 50 MILES AN HOUR...
    HEAVY RAINFALL...WITH SOME PONDING IN LOW LYING AREAS...
    DEADLY CLOUD-TO-GROUND LIGHTNING...5 TO 10 STRIKES PER MINUTE...

IF THREATENING SKIES APPROACH YOUR AREA...TAKE COVER IN A SHELTER OR
BUILDING. STRONG THUNDERSTORMS CAN QUICKLY BECOME SEVERE...PRODUCING
DESTRUCTIVE HAIL...DAMAGING WINDS...DEADLY LIGHTNING...AND VERY HEAVY
RAIN.

REPORT WEATHER RELATED DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY
OR YOUR COUNTY EMERGENCY MANAGEMENT. THEY WILL RELAY YOUR REPORT TO
THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN CARIBOU.

LAT...LON 4606 6985 4578 6970 4601 6882 4632 6890

STUREY
Special weather statement, Jun 20, 3:10 PM EDT, 1 hour 32 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CARIBOU ME
310 PM EDT TUE JUN 20 2006

MEZ002-005-006-210315-
NORTHEAST AROOSTOOK-NORTHERN PENOBSCOT-SOUTHEAST AROOSTOOK-
INCLUDING THE CITIES OF...PRESQUE ISLE...CARIBOU...VAN BUREN...
MARS HILL...MILLINOCKET...EAST MILLINOCKET...PATTEN...MEDWAY...
HOULTON...HODGDON...SHERMAN...SMYRNA MILLS
310 PM EDT TUE JUN 20 2006

...THUNDERSTORMS ROAMING ACROSS THE REGION...

THUNDERSTORMS ROUGHLY FROM VAN BUREN TO MOUNT KATAHDIN WILL MOVE
QUICKLY EAST THROUGH COMMUNITIES SUCH AS CARIBOU...MARS HILL...
BRIDGEWATER...MONTICELLO...ISLAND FALLS...HOULTON AND SHERMAN THROUGH
430 PM EDT.

WIND GUSTS TO 45 MPH...TORRENTIAL RAIN...SMALL HAIL AND FREQUENT
LIGHTNING STRIKES CAN BE EXPECTED WITH THE PASSAGE OF THESE
STORMS.

IF THREATENING WEATHER APPROACHES YOUR REGION...MOVE TO A PLACE OF
SAFETY.

STUREY
Special weather statement, Jun 20, 3:59 PM EDT, 43 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CARIBOU ME
359 PM EDT TUE JUN 20 2006

MEZ004-010-031-202130-
NORTHERN PISCATAQUIS-CENTRAL PISCATAQUIS-SOUTHERN PISCATAQUIS-
INCLUDING THE CITIES OF...BAXTER ST PARK...CHAMBERLAIN LAKE...
CHURCHILL DAM...MOUNT KATAHDIN...GREENVILLE...MONSON...
BLANCHARD...DOVER-FOXCROFT...MILO...GUILFORD
359 PM EDT TUE JUN 20 2006

...STRONG THUNDERSTORMS ACROSS PISCATAQUIS COUNTY...

THUNDERSTORMS FROM CHURCHILL DAM TO JUST WEST OF SHIRLEY WILL MOVE
EAST AND CROSS MUCH OF PISCATAQUIS COUNTY THROUGH 530 PM EDT. SOME
COMMUNITIES TO BE IMPACTED BY THE STORMS INCLUDE GREENVILLE...
RIPOGENUS...MONSON PLUS BAXTER STATE PARK.

THE STORMS ARE LIKELY TO PRODUCE WIND GUSTS TO 40 MPH...TORRENTIAL
RAIN...SMALL HAIL AND FREQUENT LIGHTNING STRIKES.

IF THREATENING WEATHER APPROACHES YOUR REGION...SEEK SAFE SHELTER
IMMEDIATELY.

STUREY

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 19, 8:33 PM EDTSpecial Weather StatementCARPenobscot57 min
Jun 20, 1:54 PM EDTSpecial Weather StatementCARAroostook66 min
Jun 20, 2:44 PM EDTSpecial Weather StatementCARPiscataquis61 min
Jun 20, 5:28 PM EDTSpecial Weather StatementCAR62 min
Jun 20, 5:37 PM EDTSpecial Weather StatementCARHancock53 min
Jun 20, 5:52 PM EDTSevere Thunderstorm WarningCARPenobscot38 min
Jun 20, 6:21 PM EDTSpecial Weather StatementCARAroostook99 min

Nearby

Severe Thunderstorm Warnings in Maine, 2006Every severe thunderstorm warning in 2006

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.