Alert archive / Mississippi / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 466, NWS Jackson, MS

June 20, 2008Clarke County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Jun 20, 2008, 4:42 PM CDT for Clarke County, Mississippi. It was in force for 48 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
Jun 20, 2008, 4:42 PM CDT (21:42 UTC)
Expired
Jun 20, 2008, 5:30 PM CDT
In force
48 min
Issued by
NWS Jackson, MS
Area
Storm-based polygon

County Clarke County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 125 km from the middle of the area, began a volume at 21:45 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 20, 1:37 PM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 9.7 hours before the alert went out and 135 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, Jackson, MS at 12:00Z on 2008-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1438 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, Jackson, MS at 12:00Z on 2008-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 49 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
1438 J/kg
Mixed-layer CIN
-32 J/kg
Mixed-layer LCL
941 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
49 m²/s²
0-3 km storm-relative helicity
57 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Jackson, MS wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 20, 3:45 PM CDT, 57 minutes earlier.

Area forecast discussion, Jun 20, 3:45 PM CDT, 57 minutes before
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Hazardous weather outlook, Jun 20, 4:01 PM CDT, 41 minutes before
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In the hours before

Special weather statement, Jun 20, 3:23 PM CDT, 1 hour 19 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
323 PM CDT FRI JUN 20 2008

MSZ029-032-033-202125-
WEBSTER MS-OKTIBBEHA MS-CHOCTAW MS-
323 PM CDT FRI JUN 20 2008

A CLUSTER OF STRONG THUNDERSTORMS CAPABLE OF PRODUCING PEA TO DIME
SIZE HAIL AND 40 TO 50 MPH WINDS WAS LOCATED 6 MILES NORTH OF
CHESTER AT 323 PM CDT...MOVING EAST AT 26 MPH.

THESE STORMS ARE INTENSIFYING AND COULD BECOME SEVERE RAPIDLY.

PEOPLE IN CHOCTAW...OKTIBBEHA AND WEBSTER COUNTIES SHOULD MONITOR
THIS STORM CLOSELY.

JC
Local storm report, Jun 20, 3:25 PM CDT, 1 hour 17 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON MS
325 PM CDT FRI JUN 20 2008

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0320 PM     HAIL             8 N TAYLORSVILLE        31.95N 89.43W
06/20/2008  E1.00 INCH       SMITH              MS   TRAINED SPOTTER

            SPOTTER OBSERVED QUARTER SIZE HAIL BETWEEN HIGHWAY 35 AND
            HIGHWAY 37 OR 8 MILES NORTH OF TAYLORSVILLE AND 5 MILES
            SOUTH OF RALEIGH.

&&

MME
Local storm report, Jun 20, 3:46 PM CDT, 56 minutes before
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Local storm report, Jun 20, 3:54 PM CDT, 48 minutes before
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Local storm report, Jun 20, 4:26 PM CDT, 16 minutes before
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Local storm report, Jun 20, 4:28 PM CDT, 14 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 20, 8:16 AM CDTSevere Thunderstorm WarningJANLeake44 min
Jun 20, 8:22 AM CDTSevere Thunderstorm WarningJANMadison, Rankin38 min
Jun 20, 12:41 PM CDTSevere Thunderstorm WarningJANWarren64 min
Jun 20, 1:01 PM CDTSevere Thunderstorm WarningJANMadison, Yazoo59 min
Jun 20, 1:11 PM CDTSevere Thunderstorm WarningJANClaiborne31 min
Jun 20, 1:21 PM CDTSevere Thunderstorm WarningJANClaiborne, Copiah, Hinds, Warren54 min
Jun 20, 1:23 PM CDTSevere Thunderstorm WarningJANRankin, Simpson, Smith67 min
Jun 20, 1:31 PM CDTSevere Thunderstorm WarningJANAdams, Claiborne, Jefferson38 min
Jun 20, 1:31 PM CDTSevere Thunderstorm WarningJANKemper, Neshoba13 min
Jun 20, 1:34 PM CDTSevere Thunderstorm WarningJANJasper, Smith56 min
Jun 20, 1:51 PM CDTSevere Thunderstorm WarningJANAdams, Franklin, Jefferson39 min
Jun 20, 2:02 PM CDTSevere Thunderstorm WarningJANHinds, Rankin29 min
Jun 20, 2:14 PM CDTSevere Thunderstorm WarningJANHinds46 min
Jun 20, 2:31 PM CDTSevere Thunderstorm WarningJANHinds, Rankin44 min
Jun 20, 2:32 PM CDTSevere Thunderstorm WarningJANKemper, Lauderdale43 min
Jun 20, 2:50 PM CDTSevere Thunderstorm WarningJANJasper, Smith55 min
Jun 20, 2:51 PM CDTSevere Thunderstorm WarningJANSmith24 min
Jun 20, 2:53 PM CDTSevere Thunderstorm WarningJANCopiah, Hinds, Rankin, Simpson52 min
Jun 20, 3:00 PM CDTSevere Thunderstorm WarningJANJefferson Davis, Lawrence60 min
Jun 20, 3:00 PM CDTSevere Thunderstorm WarningJANLauderdale, Newton45 min
Jun 20, 3:16 PM CDTSevere Thunderstorm WarningJANJasper, Smith44 min
Jun 20, 3:27 PM CDTSevere Thunderstorm WarningJANCovington, Jefferson Davis, Simpson, Smith63 min
Jun 20, 3:41 PM CDTSevere Thunderstorm WarningJANNewton37 min
Jun 20, 3:43 PM CDTFlash Flood WarningJANNewton81 min
Jun 20, 4:06 PM CDTSevere Thunderstorm WarningJANCovington, Jones54 min
Jun 20, 4:49 PM CDTSevere Thunderstorm WarningJANForrest, Lamar19 min
Jun 20, 4:54 PM CDTSevere Thunderstorm WarningJANLamar, Marion48 min
Jun 20, 5:08 PM CDTSevere Thunderstorm WarningJANForrest52 min
Jun 20, 5:14 PM CDTSevere Thunderstorm WarningJANClay14 min
Jun 20, 5:18 PM CDTSevere Thunderstorm WarningJANLamar42 min
Jun 20, 6:12 PM CDTSevere Thunderstorm WarningJANForrest34 min
Jun 20, 9:23 AM CDTSevere Thunderstorm WarningJANAshley37 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 2008Every severe thunderstorm warning in 2008

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.