Alert archive / Mississippi / Special Weather Statements in 2017

Special Weather Statement, NWS Jackson, MS

July 18, 2017Hinds County, Mississippi

NWS Jackson, MS issued this special weather statement at Jul 18, 2017, 4:36 PM CDT for Hinds County, Mississippi. It was in force for 24 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 18, 2017, 4:36 PM CDT (21:36 UTC)
Expired
Jul 18, 2017, 5:00 PM CDT
In force
24 min
Issued by
NWS Jackson, MS

County Hinds County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 66 km from the middle of the area, began a volume at 21:38 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, 9.6 hours before the alert went out and 59 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 2017-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1236 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 2017-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 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
1236 J/kg
Mixed-layer CIN
-24 J/kg
Mixed-layer LCL
649 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
25 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jul 18, 4:07 PM CDT, 29 minutes earlier.

Area forecast discussion, Jul 18, 4:07 PM CDT, 29 minutes before
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Hazardous weather outlook, Jul 18, 4:22 PM CDT, 14 minutes before
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In the hours before

Special weather statement, Jul 18, 2:25 PM CDT, 2 hours 11 minutes before
Special Weather Statement
National Weather Service Jackson MS
225 PM CDT TUE JUL 18 2017

MSZ053-054-182000-
Copiah MS-Claiborne MS-
225 PM CDT TUE JUL 18 2017

...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN CLAIBORNE AND
WESTERN COPIAH COUNTIES UNTIL 300 PM CDT...

At 225 PM CDT, Meteorologists were tracking a strong thunderstorm
near Barlow, or 12 miles west of Hazlehurst, moving west at 10 mph.

Dime size hail and winds in excess of 40 mph will be possible with
this storm.

This strong thunderstorm will be near...
  Barlow around 250 PM CDT.
  Allen around 300 PM CDT.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 3178 9074 3179 9078 3195 9082 3200 9054
      3172 9047 3170 9063 3170 9073
TIME...MOT...LOC 1925Z 077DEG 8KT 3185 9060

JM
Special weather statement, Jul 18, 3:53 PM CDT, 43 minutes before
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Special weather statement, Jul 18, 4:36 PM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 17, 7:11 PM CDTSpecial Weather StatementJANClarke34 min
Jul 17, 9:50 PM CDTSpecial Weather StatementJANNoxubee, Winston25 min
Jul 17, 10:23 PM CDTSpecial Weather StatementJANWinston37 min
Jul 18, 2:25 PM CDTSpecial Weather StatementJANCopiah35 min
Jul 18, 3:53 PM CDTSpecial Weather StatementJANClaiborne52 min

Nearby

Special Weather Statements in Mississippi, 2017Every special weather statement in 2017

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.