Alert archive / North Carolina / Severe Thunderstorm Watches in 1997

Severe Thunderstorm Watch 702

August 18, 199722 counties in North Carolina

The Storm Prediction Center issued this severe thunderstorm watch at Aug 18, 1997, 3:45 PM EDT for 22 counties in North Carolina. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Aug 18, 1997, 3:45 PM EDT (19:45 UTC)
Expired
Aug 18, 1997, 10:00 PM EDT
In force
6 hr
Issued by
the Storm Prediction Center
All 22 counties

Beaufort County, NC, Bladen County, NC, Brunswick County, NC, Carteret County, NC, Columbus County, NC, Craven County, NC, Dare County, NC, Duplin County, NC, Greene County, NC, Hyde County, NC, Jones County, NC, Lenoir County, NC, New Hanover County, NC, Onslow County, NC, Pamlico County, NC, Pender County, NC, Pitt County, NC, Robeson County, NC, Sampson County, NC, Tyrrell County, NC, Washington County, NC, Wayne County, NC

The radar

The Morehead City radar (KMHX), 76 km from the middle of the area, began a volume at 19:44 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.

Warnings issued inside it

6 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Aug 18, 3:50 PM EDTSevere Thunderstorm WarningILMPender45 min
Aug 18, 4:42 PM EDTSevere Thunderstorm WarningMHXBeaufort33 min
Aug 18, 4:50 PM EDTSevere Thunderstorm WarningILMBrunswick, New Hanover45 min
Aug 18, 5:09 PM EDTSevere Thunderstorm WarningMHXCarteret, Onslow36 min
Aug 18, 5:19 PM EDTSevere Thunderstorm WarningMHXPamlico26 min
Aug 18, 5:35 PM EDTSevere Thunderstorm WarningILMBrunswick25 min

The nearest sounding before it

Newport, NC (KMHX), launched 12:00Z, 7.8 hours before the alert went out and 75 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 1997-08-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2400 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 1997-08-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 81 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
2400 J/kg
Mixed-layer CIN
-42 J/kg
Mixed-layer LCL
869 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
81 m²/s²
0-3 km storm-relative helicity
27 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.9

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

Nearby

Severe Thunderstorm Watches in North Carolina, 1997Every severe thunderstorm watch in 1997

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.