Alert archive / Mississippi / Tornado Warnings in 2017

Tornado Warning 83, NWS New Orleans, LA

June 21, 2017Hancock County, Mississippi

NWS New Orleans, LA issued this tornado warning at Jun 21, 2017, 7:40 AM CDT for Hancock County, Mississippi. It was in force for 35 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
Jun 21, 2017, 7:40 AM CDT (12:40 UTC)
Expired
Jun 21, 2017, 8:15 AM CDT
In force
35 min
Issued by
NWS New Orleans, LA
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

County Hancock County, MS

The watch it was issued in

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

IssuedProductOfficeLasted
Jun 20, 10:24 PM CDTTornado WatchSPC12 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 0.7 hours before the alert went out and 32 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 12:00Z on 2017-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 262 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 12:00Z on 2017-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 485 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
262 J/kg
Mixed-layer CIN
-75 J/kg
Mixed-layer LCL
465 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
485 m²/s²
0-3 km storm-relative helicity
506 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.3

Open this sounding in Storm Lab

The text

As transmitted.

513 
WFUS54 KLIX 211240
TORLIX
MSC045-211315-
/O.NEW.KLIX.TO.W.0083.170621T1240Z-170621T1315Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service New Orleans LA
740 AM CDT WED JUN 21 2017

The National Weather Service in New Orleans has issued a

* Tornado Warning for...
  Hancock County in southern Mississippi...

* Until 815 AM CDT
    
* At 739 AM CDT, a severe thunderstorm capable of producing a tornado
  was located over Shoreline Park, or over Bay St. Louis, moving
  northwest at 25 mph.

  HAZARD...Tornado. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely. 

* This dangerous storm will be near...
  Diamondhead around 750 AM CDT. 
  Kiln around 755 AM CDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to an interior room on the lowest floor of a
sturdy building. Avoid windows. If you are outdoors, in a mobile
home, or in a vehicle, move to the closest substantial shelter and
protect yourself from flying debris.

&&

LAT...LON 3028 8933 3027 8939 3047 8961 3064 8937
TIME...MOT...LOC 1239Z 153DEG 23KT 3033 8937 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 20, 9:21 PM CDTRiver Flood WarningLIXHancock48 hr
Jun 20, 10:09 PM CDTFlash Flood WarningLIXHancock, Harrison6 hr
Jun 21, 3:43 AM CDTFlash Flood WarningLIXHarrison3 hr
Jun 21, 4:59 AM CDTTornado WarningLIXHancock, Harrison31 min
Jun 21, 7:31 AM CDTTornado WarningLIXHancock29 min
Jun 21, 8:11 AM CDTTornado WarningLIXHarrison34 min
Jun 21, 8:12 AM CDTTornado WarningLIXHancock18 min
Jun 21, 8:30 AM CDTTornado WarningLIXHancock, Pearl River34 min
Jun 21, 8:42 AM CDTTornado Warning Tornado observedLIXHarrison33 min
Jun 21, 8:45 AM CDTTornado WarningLIXHancock, Harrison30 min
Jun 21, 9:11 AM CDTTornado WarningLIXHancock, Harrison19 min
Jun 21, 2:35 PM CDTTornado WarningLIXHancock14 min
Jun 21, 3:21 PM CDTSevere Thunderstorm WarningLIXHancock54 min
Jun 21, 3:21 PM CDTTornado WarningLIXHarrison24 min
Jun 21, 4:00 PM CDTCoastal Flood AdvisoryLIX48 hr

Nearby

Tornado Warnings in Mississippi, 2017Every tornado warning in 2017Tornadoes 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.