Alert archive / Mississippi / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 336, NWS Jackson, MS

August 11, 2015Hinds County, Rankin County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Aug 11, 2015, 5:43 AM CDT for Hinds County, Rankin County, Mississippi. It was in force for 38 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: Aug 11, 2015, 5:43 AM CDT (10:43 UTC)
Expired: Aug 11, 2015, 6:21 AM CDT
In force: 38 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Hinds County, MS, Rankin County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 20 km from the middle of the area, began a volume at 10:43 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 00:00Z, 10.7 hours before the alert went out and 12 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 897 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 1953 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 74 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

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 Aug 11, 4:59 AM CDT, 44 minutes earlier.

Area forecast discussion, Aug 11, 4:59 AM CDT, 44 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Hazardous weather outlook, Aug 11, 5:27 AM CDT, 16 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

In the hours before

Special weather statement, Aug 11, 3:13 AM CDT, 2 hours 30 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
313 AM CDT TUE AUG 11 2015

ARZ074-075-LAZ007>009-110900-
ASHLEY AR-CHICOT AR-EAST CARROLL LA-MOREHOUSE LA-WEST CARROLL LA-
313 AM CDT TUE AUG 11 2015

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTHWESTERN CHICOT
AND SOUTHEASTERN ASHLEY COUNTIES...NORTHERN WEST
CARROLL...NORTHEASTERN MOREHOUSE AND NORTH CENTRAL EAST CARROLL
PARISHES UNTIL 400 AM CDT...

AT 312 AM CDT...METEOROLOGISTS WERE TRACKING A LINE OF STRONG
THUNDERSTORMS EXTENDING FROM NEAR CHICOT JUNCTION TO WILMOT TO NEAR
BEEKMAN...AND MOVING SOUTHEAST AT 25 MPH.

HALF INCH HAIL AND WINDS OF 40 TO 50 MPH WILL BE POSSIBLE WITH THESE
STORMS.

STRONG THUNDERSTORMS WILL BE NEAR...
  JONES AROUND 315 AM CDT.
  EUDORA AROUND 325 AM CDT.
  GALION AROUND 330 AM CDT.
  OAK GROVE AND GASSOWAY AROUND 345 AM CDT.
  MILLIKIN AROUND 350 AM CDT.
  GOODWILL AROUND 355 AM CDT.

OTHER LOCATIONS IMPACTED BY THESE STORMS INCLUDE KILBOURNE...BONITA
AND MER ROUGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HIGH WINDS CAN BRING DOWN TREES AND LARGE LIMBS RESULTING IN SERIOUS
INJURY OR PROPERTY DAMAGE. EXERCISE EXTREME CAUTION WHEN OUTDOORS
DURING SUCH STRONG WINDS...AND BE ESPECIALLY AWARE OF OLDER TREES.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THESE STORMS.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 3310 9160 3327 9134 3311 9120 3306 9112
      3296 9120 3292 9121 3270 9157 3263 9180
      3300 9192
TIME...MOT...LOC 0812Z 326DEG 23KT 3318 9134 3304 9155 3296 9180

EC

Special weather statement, Aug 11, 4:06 AM CDT, 1 hour 37 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
406 AM CDT TUE AUG 11 2015

LAZ009-016-MSZ040-047-110945-
EAST CARROLL LA-MADISON LA-ISSAQUENA MS-WARREN MS-
406 AM CDT TUE AUG 11 2015

...A CLUSTER OF STRONG THUNDERSTORMS WILL AFFECT NORTHEASTERN
MADISON AND SOUTHEASTERN EAST CARROLL PARISHES...NORTHWESTERN WARREN
AND SOUTHERN ISSAQUENA COUNTIES UNTIL 445 AM CDT...

AT 405 AM CDT...METEOROLOGISTS WERE TRACKING A CLUSTER OF STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM NEAR VALLEY PARK TO NEAR
EAGLE BEND TO 6 MILES SOUTHEAST OF TRANSYLVANIA TO ALSATIA TO NEAR
OMEGA TO MANSFORD...AND MOVING SOUTHEAST AT 15 MPH.

DIME SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THESE STORMS.

STRONG THUNDERSTORMS WILL BE NEAR...
  VALLEY PARK AND MANSFORD AROUND 410 AM CDT.
  EAGLE BEND AROUND 440 AM CDT.
  REDWOOD AROUND 445 AM CDT.

OTHER LOCATIONS IMPACTED BY THESE STORMS INCLUDE MOUND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HIGH WINDS CAN BRING DOWN TREES AND LARGE LIMBS RESULTING IN SERIOUS
INJURY OR PROPERTY DAMAGE. EXERCISE EXTREME CAUTION WHEN OUTDOORS
DURING SUCH STRONG WINDS...AND BE ESPECIALLY AWARE OF OLDER TREES.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THESE STORMS.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 3251 9069 3241 9087 3236 9094 3228 9103
      3248 9119 3260 9123 3265 9122 3266 9074
TIME...MOT...LOC 0905Z 321DEG 12KT 3259 9093 3257 9101 3262 9109 3259
9116 3255 9112 3249 9112

19

Special weather statement, Aug 11, 4:42 AM CDT, 1 hour 1 minute before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
442 AM CDT TUE AUG 11 2015

MSZ035-041-111015-
SHARKEY MS-HUMPHREYS MS-
442 AM CDT TUE AUG 11 2015

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN SHARKEY AND
SOUTHWESTERN HUMPHREYS COUNTIES UNTIL 515 AM CDT...

AT 442 AM CDT...METEOROLOGISTS WERE TRACKING A STRONG THUNDERSTORM
NEAR DELTA CITY...OR 11 MILES NORTHEAST OF ROLLING FORK...MOVING
SOUTHEAST AT 15 MPH.

HALF INCH HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.

THIS STORM WILL REMAIN OVER MAINLY RURAL AREAS OF NORTHEASTERN
SHARKEY AND SOUTHWESTERN HUMPHREYS COUNTIES...INCLUDING THE FOLLOWING
LOCATIONS...LOUISE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

HIGH WINDS CAN BRING DOWN TREES AND LARGE LIMBS RESULTING IN SERIOUS
INJURY OR PROPERTY DAMAGE. EXERCISE EXTREME CAUTION WHEN OUTDOORS
DURING SUCH STRONG WINDS...AND BE ESPECIALLY AWARE OF OLDER TREES.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 3299 9054 3289 9075 3305 9088 3309 9080
      3310 9066
TIME...MOT...LOC 0942Z 321DEG 13KT 3303 9074

19

Special weather statement, Aug 11, 5:13 AM CDT, 30 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 11, 4:06 AM CDT	Special Weather Statement	JAN	Warren	39 min
Aug 11, 4:20 AM CDT	Severe Thunderstorm Warning	JAN	Issaquena, Warren	55 min
Aug 11, 4:42 AM CDT	Special Weather Statement	JAN	Sharkey	33 min
Aug 11, 4:49 AM CDT	Severe Thunderstorm Warning	JAN	Humphreys, Sharkey, Yazoo	29 min
Aug 11, 4:52 AM CDT	Severe Thunderstorm Warning	JAN	Warren	53 min
Aug 11, 5:13 AM CDT	Special Weather Statement	JAN	Hinds	47 min
Aug 11, 5:59 AM CDT	Special Weather Statement	JAN	Claiborne	46 min
Aug 11, 6:24 AM CDT	Special Weather Statement	JAN	Jefferson	51 min
Aug 11, 6:28 AM CDT	Special Weather Statement	JAN	Simpson	32 min
Aug 11, 6:39 AM CDT	Special Weather Statement	JAN	Simpson	51 min
Aug 11, 7:08 AM CDT	Special Weather Statement	JAN	Newton	37 min
Aug 11, 7:11 AM CDT	Special Weather Statement	JAN	Lawrence	34 min
Aug 11, 7:29 AM CDT	Special Weather Statement	JAN	Warren	31 min
Aug 11, 7:51 AM CDT	Special Weather Statement	JAN	Clarke	24 min
Aug 11, 7:53 AM CDT	Special Weather Statement	JAN	Hinds	37 min
Aug 11, 8:19 AM CDT	Special Weather Statement	JAN	Clarke	26 min
Aug 11, 8:55 AM CDT	Special Weather Statement	JAN	Clarke	35 min
Aug 11, 9:11 AM CDT	Special Weather Statement	JAN	Warren	34 min
Aug 11, 10:00 AM CDT	Special Weather Statement	JAN	Copiah	30 min
Aug 11, 10:03 AM CDT	Special Weather Statement	JAN	Copiah	27 min
Aug 11, 2:20 PM CDT	Special Weather Statement	JAN	Leake	25 min
Aug 11, 3:49 PM CDT	Special Weather Statement	JAN	Clarke	26 min
Aug 11, 3:13 AM CDT	Special Weather Statement	JAN	Morehouse, West Carroll	47 min
Aug 11, 3:36 AM CDT	Severe Thunderstorm Warning	JAN	East Carroll, Morehouse, West Carroll	39 min
Aug 11, 7:19 AM CDT	Special Weather Statement	JAN	Catahoula	26 min
Aug 11, 7:48 AM CDT	Special Weather Statement	JAN	Madison	27 min
Aug 11, 8:03 AM CDT	Special Weather Statement	JAN	Franklin	27 min
Aug 11, 8:27 AM CDT	Special Weather Statement	JAN	Catahoula	33 min
Aug 11, 8:38 AM CDT	Special Weather Statement	JAN	Tensas	37 min
Aug 11, 9:15 AM CDT	Special Weather Statement	JAN	Catahoula	30 min
Aug 11, 9:28 AM CDT	Special Weather Statement	JAN	Tensas	32 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 2015 Every severe thunderstorm warning in 2015

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.