Alert archive / North Carolina / Heat Advisories in 2011

Heat Advisory 4, NWS Newport/Morehead City, NC

July 21, 201112 counties in North Carolina

NWS Newport/Morehead City, NC issued this heat advisory at Jul 21, 2011, 3:52 PM EDT for 12 counties in North Carolina. It took effect at Jul 22, 2011, 11:00 AM EDT. It was in force for .

The area

The counties it named.

The facts

Issued: Jul 21, 2011, 3:52 PM EDT (19:52 UTC)
In effect from: Jul 22, 2011, 11:00 AM EDT
Expired: Jul 22, 2011, 3:15 AM EDT
In force
Issued by: NWS Newport/Morehead City, NC

Counties Beaufort County, NC, Dare County, NC, Duplin County, NC, Greene County, NC, Hyde County, NC, Jones County, NC, Lenoir County, NC, Martin County, NC, Pamlico County, NC, Pitt County, NC, Tyrrell County, NC, Washington County, NC

The radar

The Morehead City radar (KMHX), 78 km from the middle of the area, began a volume at 19:54 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

Newport, NC (KMHX), launched 12:00Z, 7.9 hours before the alert went out and 77 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: 1737 J/kg
Mixed-layer CIN: -69 J/kg
Mixed-layer LCL: 1153 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 13 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 heat advisory 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 heat advisory went out at Jul 21, 2:46 PM EDT, 1 hour 6 minutes earlier.

Area forecast discussion, Jul 21, 2:46 PM EDT, 1 hour 6 minutes before

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Hazardous weather outlook, Jul 21, 3:43 PM EDT, 9 minutes before

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In the hours before

Special weather statement, Jul 21, 2:04 PM EDT, 1 hour 48 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEWPORT/MOREHEAD CITY NC
204 PM EDT THU JUL 21 2011

NCZ093-094-211830-
CRAVEN-PAMLICO-
204 PM EDT THU JUL 21 2011

...A STRONG THUNDERSTORM WILL MOVE ACROSS PAMLICO AND CRAVEN COUNTIES
THROUGH 230 PM EDT...

AT 204 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER
FAIRFIELD HARBOR...OR ABOUT OVER JAMES CITY...MOVING EAST AT 5 MPH.

SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE...REELSBORO.

HAZARDS INCLUDE...
GUSTY WINDS OF 30 TO 40 MPH.

SEEK SHELTER IN A NEARLY BUILDING OR VEHICLE. STRONG WINDS ARE
CAPABLE OF KNOCKING DOWN SMALL TREES AND BLOWING AROUND TRASH CANS...
POTTED PLANTS...LAWN FURNITURE AND OTHER LIGHT OUTDOOR OBJECTS.

&&

LAT...LON 3502 7690 3502 7693 3505 7696 3505 7698
      3507 7700 3504 7698 3500 7697 3497 7692
      3498 7705 3516 7706 3519 7675 3499 7674
      3497 7677 3497 7683
TIME...MOT...LOC 1804Z 268DEG 6KT 3507 7694

5

Special weather statement, Jul 21, 2:05 PM EDT, 1 hour 47 minutes before

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Special weather statement, Jul 21, 2:26 PM EDT, 1 hour 26 minutes before

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Special weather statement, Jul 21, 2:46 PM EDT, 1 hour 6 minutes before

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Special weather statement, Jul 21, 3:32 PM EDT, 20 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 2:04 PM EDT	Special Weather Statement	MHX	Craven	26 min
Jul 21, 2:05 PM EDT	Special Weather Statement	MHX	Onslow	25 min
Jul 21, 2:26 PM EDT	Special Weather Statement	MHX	Beaufort	34 min
Jul 21, 3:32 PM EDT	Special Weather Statement	MHX	Craven	28 min
Jul 21, 4:00 PM EDT	Special Weather Statement	MHX	Hyde	30 min
Jul 21, 4:46 PM EDT	Special Weather Statement	MHX	Jones	29 min
Jul 21, 4:55 PM EDT	Special Weather Statement	MHX	Duplin	35 min
Jul 21, 5:27 PM EDT	Special Weather Statement	MHX	Craven	33 min

Nearby

Heat Advisories in North Carolina, 2011 Every heat advisory in 2011

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.