Alert archive / North Carolina / Special Weather Statements in 2021

Special Weather Statement, NWS Newport/Morehead City, NC

July 18, 2021Onslow County, North Carolina

NWS Newport/Morehead City, NC issued this special weather statement at Jul 18, 2021, 3:25 PM EDT for Onslow County, North Carolina. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 18, 2021, 3:25 PM EDT (19:25 UTC)
Expired
Jul 18, 2021, 4:00 PM EDT
In force
35 min
Issued by
NWS Newport/Morehead City, NC

County Onslow County, NC

The radar

The Morehead City radar (KMHX), 67 km from the middle of the area, began a volume at 19:26 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, 7.4 hours before the alert went out and 67 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 2021-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1545 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Newport, NC at 12:00Z on 2021-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 76 square meters per square second.1939Sfc1 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
1545 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
750 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
76 m²/s²
0-3 km storm-relative helicity
61 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.1

Open this sounding in Storm Lab

The text

As transmitted.

090 
WWUS82 KMHX 181925
SPSMHX

Special Weather Statement
National Weather Service Newport/Morehead City NC
325 PM EDT Sun Jul 18 2021

NCZ090-198-199-182000-
Coastal Onslow-Inland Onslow-Duplin-
325 PM EDT Sun Jul 18 2021

...A STRONG THUNDERSTORM WILL AFFECT WEST CENTRAL ONSLOW AND
SOUTHEASTERN DUPLIN COUNTIES...

At 325 PM EDT, a strong thunderstorm was located near Catherine Lake,
or 8 miles west of New River Station, moving east at 20 mph.

Winds in excess of 30 mph are possible with this storm.

Locations impacted include...
Jacksonville, Verona, Catherine Lake and Haws Run. 

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

LAT...LON 3469 7767 3472 7768 3477 7770 3480 7748
      3461 7741 3457 7762
TIME...MOT...LOC 1925Z 265DEG 15KT 3472 7759 

$$

41

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 17, 8:23 PM EDTSpecial Weather StatementMHXPitt37 min
Jul 18, 4:04 PM EDTSpecial Weather StatementMHXCraven, Jones41 min
Jul 18, 4:45 PM EDTSpecial Weather StatementMHXCraven45 min
Jul 18, 4:46 PM EDTSpecial Marine WarningMHX44 min
Jul 18, 4:48 PM EDTSpecial Weather StatementMHXHyde42 min
Jul 18, 5:10 PM EDTSpecial Weather StatementMHXDare50 min
Jul 18, 5:28 PM EDTSpecial Marine WarningMHX47 min
Jul 18, 5:28 PM EDTSpecial Weather StatementMHXHyde32 min
Jul 18, 5:32 PM EDTAreal Flood AdvisoryMHXDare118 min
Jul 18, 5:57 PM EDTSpecial Weather StatementMHXDare48 min
Jul 18, 5:59 PM EDTSpecial Weather StatementMHXDare46 min
Jul 18, 6:34 PM EDTSpecial Marine WarningMHX56 min

Nearby

Special Weather Statements in North Carolina, 2021Every special weather statement in 2021

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.