Alert archive / Mississippi / Tornado Warnings in 2017

Tornado Warning 37, NWS Mobile, AL

June 21, 2017Greene County, Mississippi

NWS Mobile, AL issued this tornado warning at Jun 21, 2017, 4:03 PM CDT for Greene County, Mississippi. It was in force for 17 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, 4:03 PM CDT (21:03 UTC)
Expired
Jun 21, 2017, 4:20 PM CDT
In force
17 min
Issued by
NWS Mobile, AL
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

County Greene County, MS

The radar

The Mobile radar (KMOB), 59 km from the middle of the area, began a volume at 21:02 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 21, 10:01 AM CDTTornado WatchSPC9 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 9.1 hours before the alert went out and 146 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.

055 
WFUS54 KMOB 212103
TORMOB
MSC041-212145-
/O.NEW.KMOB.TO.W.0037.170621T2103Z-170621T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mobile AL
403 PM CDT WED JUN 21 2017

The National Weather Service in Mobile has issued a

* Tornado Warning for...
  Central Greene County in southeastern Mississippi...

* Until 445 PM CDT
    
* At 403 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 7 miles north of Lucedale, moving northwest at 30 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...
  Leakesville around 420 PM CDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or 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 3100 8845 3100 8861 3126 8884 3138 8850
TIME...MOT...LOC 2103Z 150DEG 25KT 3103 8854 

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

$$
1 follow-up statement
434 
WWUS54 KMOB 212120
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
420 PM CDT WED JUN 21 2017

MSC041-212130-
/O.CAN.KMOB.TO.W.0037.000000T0000Z-170621T2145Z/
Greene MS-
420 PM CDT WED JUN 21 2017

...THE TORNADO WARNING FOR CENTRAL GREENE COUNTY IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore the warning has been cancelled.

A tornado watch remains in effect until 700 PM CDT for southeastern
Mississippi.

LAT...LON 3100 8845 3100 8861 3126 8884 3138 8850
TIME...MOT...LOC 2118Z 150DEG 25KT 3114 8861 

$$

The office that day

Everything else NWS Mobile, AL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 20, 10:16 PM CDTFlash Flood WarningMOBGeorge, Stone6 hr
Jun 21, 4:15 AM CDTFlash Flood WarningMOBGeorge, Stone12 hr
Jun 21, 9:01 AM CDTTornado WarningMOBStone37 min
Jun 21, 9:29 AM CDTRiver Flood WarningMOBPerry5 days
Jun 21, 12:35 PM CDTAreal Flood WarningMOBGeorge, Greene, Perry, Stone, Wayne24 hr
Jun 21, 3:37 PM CDTSpecial Weather StatementMOBStone38 min
Jun 21, 3:46 PM CDTFlash Flood WarningMOBGeorge, Greene, Perry, Stone, Wayne6 hr
Jun 21, 5:51 PM CDTFlash Flood WarningMOBGreene, Wayne6 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; radar from the NEXRAD Level II archive.