Alert archive / Mississippi / Tornado Warnings in 2017

Tornado Warning 26, NWS Mobile, AL

May 12, 2017Stone County, Mississippi

NWS Mobile, AL issued this tornado warning at May 12, 2017, 11:54 AM CDT for Stone County, Mississippi. It was in force for 10 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: May 12, 2017, 11:54 AM CDT (16:54 UTC)
Expired: May 12, 2017, 12:04 PM CDT
In force: 10 min
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Stone County, MS

The radar

The Mobile radar (KMOB), 67 km from the middle of the area, began a volume at 16:55 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.

Issued	Product	Office	Lasted
May 12, 10:35 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 4.9 hours before the alert went out and 90 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: 1224 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 587 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 118 m²/s²
0-3 km storm-relative helicity: 136 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.5

Open this sounding in Storm Lab

The text

As transmitted.

574 
WFUS54 KMOB 121654
TORMOB
MSC131-121745-
/O.NEW.KMOB.TO.W.0026.170512T1654Z-170512T1745Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Mobile AL
1154 AM CDT FRI MAY 12 2017

The National Weather Service in Mobile has issued a

* Tornado Warning for...
  Southeastern Stone County in southeastern Mississippi...

* Until 1245 PM CDT
    
* At 1152 AM CDT, a severe thunderstorm capable of producing a
  tornado was located near McHenry, or 12 miles southeast of Wiggins,
  moving east at 10 to 15 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 tornadic thunderstorm will remain over mainly rural areas of
  southeastern Stone County.

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 3077 8889 3071 8889 3071 8888 3070 8888
      3068 8889 3068 8908 3072 8908
TIME...MOT...LOC 1652Z 258DEG 10KT 3069 8904 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

1 follow-up statement

284 
WWUS54 KMOB 121704
SVSMOB

Severe Weather Statement
National Weather Service Mobile AL
1204 PM CDT FRI MAY 12 2017

MSC131-121714-
/O.CAN.KMOB.TO.W.0026.000000T0000Z-170512T1745Z/
Stone MS-
1204 PM CDT FRI MAY 12 2017

...THE TORNADO WARNING FOR SOUTHEASTERN STONE 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 severe thunderstorm watch remains in effect until 400 PM CDT for
southeastern Mississippi.

LAT...LON 3077 8889 3071 8889 3071 8888 3070 8888
      3068 8889 3068 8908 3072 8908
TIME...MOT...LOC 1700Z 258DEG 10KT 3070 8900 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 12, 10:27 AM CDT	Special Weather Statement	MOB	George	48 min
May 12, 10:45 AM CDT	Severe Thunderstorm Warning	MOB	George, Greene, Perry, Stone	60 min
May 12, 10:48 AM CDT	Special Weather Statement	MOB	Wayne	42 min
May 12, 11:21 AM CDT	Special Weather Statement	MOB	Greene	54 min
May 12, 11:41 AM CDT	Severe Thunderstorm Warning	MOB	George, Stone	64 min

Nearby

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