Alert archive / Mississippi / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 27, NWS Jackson, MS

February 21, 2010Claiborne County, Copiah County, Jefferson County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Feb 21, 2010, 9:00 PM CST for Claiborne County, Copiah County, Jefferson County, Mississippi. It was in force for 45 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
Feb 21, 2010, 9:00 PM CST (03:00 UTC)
Expired
Feb 21, 2010, 9:45 PM CST
In force
45 min
Issued by
NWS Jackson, MS
Area
Storm-based polygon

Counties Claiborne County, MS, Copiah County, MS, Jefferson County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 90 km from the middle of the area, began a volume at 03:03 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

Slidell Radar S, LA (KSIL), launched 00:00Z, 3.0 hours before the alert went out and 207 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, Slidell Radar S, LA at 00:00Z on 2010-02-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 344 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, Slidell Radar S, LA at 00:00Z on 2010-02-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 188 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
344 J/kg
Mixed-layer CIN
-99 J/kg
Mixed-layer LCL
524 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
188 m²/s²
0-3 km storm-relative helicity
233 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.3

Open this sounding in Storm Lab

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 21, 7:22 PM CSTSevere Thunderstorm WarningJANAdams, Franklin, Jefferson38 min
Feb 21, 7:26 PM CSTSevere Thunderstorm WarningJANClaiborne, Copiah, Hinds, Warren36 min
Feb 21, 7:53 PM CSTSevere Thunderstorm WarningJANAdams35 min
Feb 21, 8:17 PM CSTSevere Thunderstorm WarningJANCopiah, Lawrence, Lincoln, Simpson58 min
Feb 21, 10:34 PM CSTSevere Thunderstorm WarningJANMarion56 min
Feb 21, 11:21 PM CSTFlash Flood WarningJANMarion95 min
Feb 21, 11:32 PM CSTSevere Thunderstorm WarningJANForrest, Lamar58 min
Feb 21, 11:37 PM CSTSevere Thunderstorm WarningJANLamar, Marion53 min
Feb 22, 12:10 AM CSTSevere Thunderstorm WarningJANForrest35 min
Feb 21, 6:30 PM CSTSevere Thunderstorm WarningJANCatahoula, Concordia28 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 2010Every severe thunderstorm warning in 2010

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.