Alert archive / Mississippi / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 318, NWS Jackson, MS

July 12, 2016Madison County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Jul 12, 2016, 4:57 PM CDT for Madison 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
Jul 12, 2016, 4:57 PM CDT (21:57 UTC)
Expired
Jul 12, 2016, 5:45 PM CDT
In force
48 min
Issued by
NWS Jackson, MS
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Madison County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 40 km from the middle of the area, began a volume at 22:00 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

Jackson, MS (KJAN), launched 12:00Z, 10.0 hours before the alert went out and 35 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 2016-07-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 658 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 2016-07-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -45 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
658 J/kg
Mixed-layer CIN
-133 J/kg
Mixed-layer LCL
1091 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
-45 m²/s²
0-3 km storm-relative helicity
-22 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Jul 12, 3:47 PM CDT, 1 hour 10 minutes earlier.

Area forecast discussion, Jul 12, 3:47 PM CDT, 1 hour 10 minutes before
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Hazardous weather outlook, Jul 12, 2:48 PM CDT, 2 hours 9 minutes before
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In the hours before

Special weather statement, Jul 12, 2:08 PM CDT, 2 hours 49 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
208 PM CDT TUE JUL 12 2016

MSZ065-121930-
COVINGTON MS-
208 PM CDT TUE JUL 12 2016

...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN COVINGTON COUNTY
UNTIL 230 PM CDT...

AT 207 PM CDT...METEOROLOGISTS WERE TRACKING A STRONG THUNDERSTORM 7
MILES SOUTH OF COLLINS...MOVING NORTHEAST AT 25 MPH.

DIME SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.

THIS STRONG THUNDERSTORM WILL BE NEAR...
  COLLINS AROUND 220 PM CDT.

OTHER LOCATIONS IMPACTED BY THIS STORM INCLUDE SEMINARY.

LAT...LON 3152 8960 3154 8961 3155 8961 3155 8962
      3156 8965 3168 8956 3163 8941 3152 8940
      3145 8947
TIME...MOT...LOC 1907Z 212DEG 22KT 3153 8955

CME
Special weather statement, Jul 12, 3:18 PM CDT, 1 hour 39 minutes before
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Special weather statement, Jul 12, 3:22 PM CDT, 1 hour 35 minutes before
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Special weather statement, Jul 12, 4:16 PM CDT, 41 minutes before
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Special weather statement, Jul 12, 4:35 PM CDT, 22 minutes before
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Special weather statement, Jul 12, 4:49 PM CDT, 8 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 11, 7:07 PM CDTSevere Thunderstorm WarningJANWashington40 min
Jul 11, 7:13 PM CDTSevere Thunderstorm WarningJANCovington32 min
Jul 11, 7:22 PM CDTSevere Thunderstorm WarningJANMadison, Yazoo38 min
Jul 11, 7:36 PM CDTSevere Thunderstorm WarningJANIssaquena39 min
Jul 11, 7:44 PM CDTSevere Thunderstorm WarningJANWashington27 min
Jul 11, 8:07 PM CDTSpecial Weather StatementJANRankin38 min
Jul 11, 8:13 PM CDTSpecial Weather StatementJANSunflower32 min
Jul 12, 2:08 PM CDTSpecial Weather StatementJANCovington22 min
Jul 12, 3:18 PM CDTSpecial Weather StatementJANSimpson27 min
Jul 12, 3:22 PM CDTSpecial Weather StatementJANKemper23 min
Jul 12, 4:16 PM CDTSpecial Weather StatementJANJasper29 min
Jul 12, 4:35 PM CDTSpecial Weather StatementJANSmith25 min
Jul 12, 4:49 PM CDTSpecial Weather StatementJANNewton26 min
Jul 11, 7:19 PM CDTSevere Thunderstorm WarningJANEast Carroll, Morehouse, West Carroll41 min
Jul 11, 8:24 PM CDTSpecial Weather StatementJANChicot66 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 2016Every severe thunderstorm warning in 2016

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.