Alert archive / North Carolina / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 16, NWS Newport/Morehead City, NC

April 20, 2009Duplin County, North Carolina

NWS Newport/Morehead City, NC issued this severe thunderstorm warning at Apr 20, 2009, 5:00 PM EDT for Duplin County, North Carolina. It was in force for 60 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
Apr 20, 2009, 5:00 PM EDT (21:00 UTC)
Expired
Apr 20, 2009, 6:00 PM EDT
In force
60 min
Issued by
NWS Newport/Morehead City, NC
Area
Storm-based polygon

County Duplin County, NC

The radar

The Raleigh/Durham radar (KRAX), 96 km from the middle of the area, began a volume at 21:00 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
Apr 20, 3:16 PM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Newport, NC (KMHX), launched 12:00Z, 9.0 hours before the alert went out and 98 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, Newport, NC at 12:00Z on 2009-04-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 286 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, Newport, NC at 12:00Z on 2009-04-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 118 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
286 J/kg
Mixed-layer CIN
-16 J/kg
Mixed-layer LCL
759 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
118 m²/s²
0-3 km storm-relative helicity
154 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

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 Newport/Morehead City, NC wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 20, 3:59 PM EDT, 1 hour 1 minute earlier.

Area forecast discussion, Apr 20, 3:59 PM EDT, 1 hour 1 minute before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NEWPORT/MOREHEAD CITY NC
359 PM EDT MON APR 20 2009

.SYNOPSIS...
A COLD FRONT WILL MOVE THROUGH THE AREA TONIGHT. A SECONDARY COLD
FRONT WITH LIMITED MOISTURE WILL APPROACH FROM THE NORTHWEST ON
TUESDAY AND PUSH THROUGH THE REGION TUESDAY NIGHT. HIGH PRESSURE
BUILDS INTO THE AREA WEDNESDAY AND THURSDAY BEFORE MOVING OFF THE
COAST WHILE CONTINUING TO INFLUENCE THE WEATHER INTO EARLY NEXT
WEEK.

&&

.NEAR TERM /UNTIL 6 AM TUESDAY MORNING/...
AS OF 400 PM MONDAY...SCATTERED CONVECTION REDEVELOPING INLAND
WHERE AIRMASS HAS HAD TIME TO RECOVER. WATCH #179 IS IN EFFECT
UNTIL 10 PM. THERE IS JUST ENOUGH SHEAR/INSTABILITY AND MOISTURE
FOR SCATTERED STRONG TO SEVERE THUNDERSTORMS WITH DAMAGING WIND
GUSTS AND LARGE HAIL THE MAIN THREATS. DEWPOINTS HAVE HAVE REALLY
MIXED OUT THIS AFTERNOON DROPPING FROM THE MID/UPPER 60S TO THE
MID AND UPPER 50S AND THIS MAY ACT TO INHIBIT THUNDERSTORM INITIATION
WHILE ENHANCING THE WIND DAMAGE THREAT FOR STORMS THAT ARE ABLE TO
FORM. ACTIVITY SHOULD TAPER OFF BY 02Z BUT WILL NEED TO CARRY A
CHANCE POP OVERNIGHT AS INITIAL FRONT MOVES THROUGH THE AREA LATE.
OVERNIGHT LOWS WILL BE AROUND 60.

&&

.SHORT TERM /6 AM TUESDAY MORNING THROUGH THURSDAY/...
AS OF 400 PM MONDAY...UPPER TROUGH OVER THE EASTERN US WILL
DOMINATE THE SHORT TERM FORECAST. A SECONDARY FRONT WITH LIMITED
MOISTURE WILL APPROACH THE AREA LATE TUESDAY AND CROSS THE AREA
TUESDAY NIGHT. SW FLOW AHEAD OF FRONT WILL HELP BOOST TEMPS INTO
THE 70S TUESDAY. DEEP CYCLONIC FLOW SHOULD OVERCOME LACK OF
MOISTURE SO WILL CARRY A 30 POP TUESDAY AFTERNOON/EVENING. THE
FRONT WILL CROSS THE AREA LATE TUESDAY NIGHT FOLLOWED BY COOLER
TEMPERATURES AND DRIER CONDITIONS FOR WEDNESDAY AND THURSDAY WITH
HIGHS ONLY IN THE 60S BOTH DAYS THE COOLEST BEING WEDNESDAY WHEN
TEMPERATURES MAY NOT ESCAPE THE MID 60S.

&&

.LONG TERM /THURSDAY NIGHT THROUGH MONDAY/...
AS OF 400 PM MONDAY...WHILE THE FLOW WILL REMAIN AMPLIFIED THROUGH
THE PERIOD THE PATTERN WILL FLIP FLOP WITH THE EASTERN UPPER TROUGH
BEING REPLACED BY AN UPPER RIDGE BEGINNING THURSDAY AND PERSISTING
INTO THE WEEKEND. THE PATTERN WILL RESULT IN DRY AND INITIALLY
COOLER THAN NORMAL TEMPS DURING MIDWEEK WITH INCREASINGLY WARMER
WEATHER AS THE UPPER RIDGE STRENGTHENS AND SURFACE HIGH PRESSURE
BUILDS OVER THE THE AREA LATE IN THE WEEK THEN MOVES OFF THE COAST
OVER THE WEEKEND. THE STRONG UPPER RIDGE SHOULD KEEP A BACK DOOR
COLD FRONT AT BAY UNTIL TUESDAY.

&&

.AVIATION /20Z MONDAY THROUGH SATURDAY/...
AS OF 310 PM MON...NUMEROUS SHOWERS AND STORMS EXPECTED AT ALL
AREA TERMINALS THROUGH LATE THIS EVENING. SOME STORMS WILL BE
SEVERE WITH DAMAGING WINDS AND LARGE HAIL. SEVERE THREAT WILL END
LATE THIS EVENING AS ACTIVITY MOVES OFF THE COAST. MVFR CONDITIONS
WITH IFR/LIFR IN STORMS. WINDS WILL BE SOUTH TO SOUTHWEST 15-25
KNOTS THROUGH THIS EVENING. WINDS WILL SLOWLY DIMINISH TO 10-15
KNOTS THIS EVENING...THEN DIMINISH FURTHER TO 5-10 KNOTS FOR THE
OVERNIGHT. THE COLD FRONT WILL MOVE OFF THE COAST EARLY TUESDAY
TAKING MOST OF THE LOW CLOUDS WITH IT. WINDS ON TUESDAY WILL BE
SOUTHWEST 10-15 KNOTS WITH ONLY ISOLATED SHOWERS POSSIBLE.

VFR CONDITIONS EXPECTED FOR THE REMAINDER OF THE WEEK AS HIGH
PRESSURE BUILDS IN FROM THE WEST.

&&

.MARINE...
AS OF 310 PM MON...GENERALLY FOLLOWED THE 12Z GFS FOR THIS
PACKAGE. STAYED CLOSE TO CURRENT FORECAST WITH NO BIG CHANGES.
SMALL CRAFT CONDITIONS ALL AREAS EXCEPT FOR THE ALBEMARLE SOUND.
THE COLD FRONT WILL MOVE OFF THE COAST EARLY TUESDAY. CIRCULATION
AROUND LARGE LOW TO THE NORTHEAST WILL KEEP WINDS WEST TO
SOUTHWEST THROUGH WEDNESDAY NIGHT. WINDS WILL BECOME MUCH LIGHTER
THURSDAY AND FRIDAY AS A SURFACE RIDGE BUILDS IN FROM THE WEST.
THE HIGH WILL MOVE OFF THE COAST LATE THIS WEEK WITH THE FLOW
BECOMING SOUTHWEST THIS WEEKEND.

&&

.MHX WATCHES/WARNINGS/ADVISORIES...
NC...NONE.
MARINE...SMALL CRAFT ADVISORY UNTIL 6 AM EDT TUESDAY FOR AMZ135.
     SMALL CRAFT ADVISORY UNTIL 11 AM EDT THURSDAY FOR AMZ152-154.
     SMALL CRAFT ADVISORY UNTIL 8 AM EDT THURSDAY FOR AMZ156.
     SMALL CRAFT ADVISORY UNTIL 8 AM EDT TUESDAY FOR AMZ150.
     SMALL CRAFT ADVISORY UNTIL 8 PM EDT WEDNESDAY FOR AMZ158.

&&

SYNOPSIS...JME
NEAR TERM...JME
SHORT TERM...JME
LONG TERM...JME
AVIATION...HSA
MARINE...HSA
Hazardous weather outlook, Apr 20, 4:53 AM EDT, 12 hours 7 minutes before
HAZARDOUS WEATHER OUTLOOK FOR EASTERN NORTH CAROLINA
NATIONAL WEATHER SERVICE NEWPORT/MOREHEAD CITY NC
453 AM EDT MON APR 20 2009

NCZ029-044>047-079>081-090>094-098-210900-
MARTIN-PITT-WASHINGTON-TYRRELL-MAINLAND DARE-GREENE-BEAUFORT-
MAINLAND HYDE-DUPLIN-LENOIR-JONES-CRAVEN-PAMLICO-ONSLOW-
453 AM EDT MON APR 20 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN NORTH CAROLINA.

.DAY ONE...TODAY AND TONIGHT.

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND
EVENING.

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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON.

NCZ103-210900-
OUTER BANKS DARE-
453 AM EDT MON APR 20 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN NORTH CAROLINA.

.DAY ONE...TODAY AND TONIGHT.

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND
EVENING.

THERE IS A MODERATE THREAT OF RIP CURRENTS ON AREA BEACHES SOUTH
OF CAPE HATTERAS TODAY.

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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON.

NCZ095-104-210900-
CARTERET-OUTER BANKS HYDE-
453 AM EDT MON APR 20 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN NORTH CAROLINA.

.DAY ONE...TODAY AND TONIGHT.

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND
EVENING.

THERE IS A MODERATE THREAT OF RIP CURRENTS ON AREA BEACHES NORTH
OF CAPE LOOKOUT TODAY.

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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED.

In the hours before

Special weather statement, Apr 20, 12:52 PM EDT, 4 hours 8 minutes before
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Special weather statement, Apr 20, 2:20 PM EDT, 2 hours 40 minutes before
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Special weather statement, Apr 20, 3:30 PM EDT, 1 hour 30 minutes before
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Special weather statement, Apr 20, 4:36 PM EDT, 24 minutes before
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Local storm report, Apr 20, 4:55 PM EDT, 5 minutes before
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Local storm report, Apr 20, 4:59 PM EDT, 1 minute before
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The office that day

Everything else NWS Newport/Morehead City, NC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 20, 11:45 AM EDTSpecial Marine WarningMHX45 min
Apr 20, 2:35 PM EDTSpecial Marine WarningMHX40 min
Apr 20, 2:56 PM EDTSpecial Marine WarningMHX49 min
Apr 20, 4:26 PM EDTSevere Thunderstorm WarningMHXGreene, Pitt49 min
Apr 20, 5:07 PM EDTSevere Thunderstorm WarningMHXBeaufort, Martin, Pitt, Washington53 min
Apr 20, 5:55 PM EDTTornado WarningMHXMartin, Washington35 min
Apr 20, 5:58 PM EDTSevere Thunderstorm WarningMHXDuplin, Jones, Lenoir, Onslow28 min
Apr 20, 7:03 PM EDTSevere Thunderstorm WarningMHXGreene, Martin, Pitt42 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2009Every severe thunderstorm warning in 2009

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.