Alert archive / North Carolina / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 41, NWS Newport/Morehead City, NC

August 11, 1999Dare County, North Carolina

NWS Newport/Morehead City, NC issued this severe thunderstorm warning at Aug 11, 1999, 4:47 PM EDT for Dare County, North Carolina. It was in force for 43 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Aug 11, 1999, 4:47 PM EDT (20:47 UTC)
Expired
Aug 11, 1999, 5:30 PM EDT
In force
43 min
Issued by
NWS Newport/Morehead City, NC
Area
Whole counties

County Dare County, NC

What was reported inside it

TimeReportWhereRemark
Aug 11, 5:00 PM EDTThunderstorm Wind 52East Lake, NCWinds in excess of 60 mph recorded at Alligator Bridge.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 8.8 hours before the alert went out and 241 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, Wallops Is Stn, VA at 12:00Z on 1999-08-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1225 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, Wallops Is Stn, VA at 12:00Z on 1999-08-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 217 square meters per square second.193958Sfc1 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
1225 J/kg
Mixed-layer CIN
-45 J/kg
Mixed-layer LCL
725 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
217 m²/s²
0-3 km storm-relative helicity
265 m²/s²
Significant tornado parameter
1.3
Supercell composite
7.6

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.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 11, 4:00 PM EDTSevere Thunderstorm WarningMHXBeaufort, Craven, Pamlico45 min
Aug 11, 5:10 PM EDTSevere Thunderstorm WarningMHXHyde50 min
Aug 11, 5:47 PM EDTSevere Thunderstorm WarningMHXOnslow43 min
Aug 11, 6:03 PM EDTSevere Thunderstorm WarningMHXHyde42 min
Aug 11, 6:32 PM EDTSevere Thunderstorm WarningMHXDare43 min
Aug 11, 7:11 PM EDTSevere Thunderstorm WarningMHXCraven49 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 1999Every severe thunderstorm warning in 1999

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.