Alert archive / Mississippi / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 9, NWS New Orleans, LA

January 21, 2017Wilkinson County, Mississippi

NWS New Orleans, LA issued this severe thunderstorm warning at Jan 21, 2017, 12:12 AM CST for Wilkinson County, Mississippi. It was in force for 33 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: Jan 21, 2017, 12:12 AM CST (06:12 UTC)
Expired: Jan 21, 2017, 12:45 AM CST
In force: 33 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Wilkinson County, MS

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jan 20, 11:00 PM CST	Tornado Watch	SPC	8 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 6.2 hours before the alert went out and 156 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1897 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 101 m²/s²
0-3 km storm-relative helicity: 124 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

741 
WUUS54 KLIX 210612
SVRLIX
MSC157-210645-
/O.NEW.KLIX.SV.W.0009.170121T0612Z-170121T0645Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service New Orleans LA
1212 AM CST SAT JAN 21 2017

The National Weather Service in New Orleans has issued a

* Severe Thunderstorm Warning for...
  Central Wilkinson County in southern Mississippi...

* Until 1245 AM CST

* At 1212 AM CST, a severe thunderstorm was located near Woodville,
  or 25 miles north of Jackson, moving northeast at 40 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* Locations impacted include...
  Woodville, Dolorosa and Crosby. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

A tornado watch remains in effect until 700 AM CST for southern
Mississippi.

LAT...LON 3135 9121 3135 9115 3132 9112 3133 9110
      3129 9108 3128 9106 3123 9106 3107 9135
      3118 9146 3134 9137 3134 9134 3136 9130
      3136 9128 3137 9126 3136 9126 3137 9123
TIME...MOT...LOC 0612Z 218DEG 35KT 3118 9134 

HAIL...1.00IN
WIND...60MPH
 
$$

AK

1 follow-up statement

911 
WWUS54 KLIX 210641
SVSLIX

Severe Weather Statement
National Weather Service New Orleans LA
1241 AM CST SAT JAN 21 2017

MSC157-210650-
/O.EXP.KLIX.SV.W.0009.000000T0000Z-170121T0645Z/
Wilkinson MS-
1241 AM CST SAT JAN 21 2017

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL WILKINSON COUNTY WILL
EXPIRE AT 1245 AM CST...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.

A tornado watch remains in effect until 700 AM CST for southern
Mississippi.

LAT...LON 3135 9121 3135 9115 3132 9112 3133 9110
      3129 9108 3128 9106 3123 9106 3107 9135
      3118 9146 3134 9137 3134 9134 3136 9130
      3136 9128 3137 9126 3136 9126 3137 9123
TIME...MOT...LOC 0640Z 218DEG 35KT 3140 9114 

$$

AK

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 New Orleans, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jan 20, 11:54 PM CST, 18 minutes earlier.

Area forecast discussion, Jan 20, 11:54 PM CST, 18 minutes before

Area Forecast Discussion
National Weather Service New Orleans LA
1154 PM CST Fri Jan 20 2017

.AVIATION...
Strong convection is expected to impact the terminals from west to
east through the early morning hours, primarily between 07z and
13z. In advance of the convection, patchy fog will impact many of
the terminals, especially KGPT where the fog will be dense at
times. After the convection moves through, generally MVFR category
conditions are forecast due to ceilings through the day Saturday
and into Saturday evening. 11

&&

.PRELIMINARY POINT TEMPS/POPS...
MCB  61  77  55  68 /  80  60  60  50
BTR  62  79  56  68 /  80  50  60  50
ASD  64  78  60  69 /  80  70  60  50
MSY  65  79  60  70 /  70  70  50  40
GPT  64  75  60  69 /  80  70  60  50
PQL  64  76  60  70 /  70  60  60  50

&&

.LIX WATCHES/WARNINGS/ADVISORIES...
LA...Gale Watch from Sunday morning through late Sunday night for
     LAZ068>070.

GM...Gale Watch from Sunday morning through late Sunday night for
     GMZ536-538-550-552-555-557-570-572-575-577.

     Dense Fog Advisory until 3 AM CST Saturday for GMZ532-534.

MS...Dense Fog Advisory until 3 AM CST Saturday for MSZ080>082.

GM...Gale Watch from Sunday morning through late Sunday night for
     GMZ538-550-552-555-557-570-572-575-577.

     Dense Fog Advisory until 3 AM CST Saturday for GMZ534.

&&

Hazardous weather outlook, Jan 20, 4:30 PM CST, 7 hours 42 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NEW ORLEANS LA
430 PM CST FRI JAN 20 2017

GMZ530-532-534-536-538-550-552-555-557-570-572-575-577-LAZ034>037-
039-040-046>050-056>072-MSZ068>071-077-080>082-211400-
LAKE PONTCHARTRAIN AND LAKE MAUREPAS-MISSISSIPPI SOUND-
LAKE BORGNE-CHANDELEUR SOUND-BRETON SOUND-
COASTAL WATERS FROM PORT FOURCHON LA TO LOWER ATCHAFALAYA RIVER
LA OUT 20 NM-
COASTAL WATERS FROM THE SOUTHWEST PASS OF THE MISSISSIPPI RIVER
TO PORT FOURCHON LOUISIANA OUT 20 NM-
COASTAL WATERS FROM BOOTHVILLE LA TO SOUTHWEST PASS OF THE
MISSISSIPPI RIVER OUT 20 NM-
COASTAL WATERS FROM PASCAGOULA MISSISSIPPI TO STAKE ISLAND OUT
20 NM-
COASTAL WATERS FROM PORT FOURCHON LOUISIANA TO LOWER ATCHAFALAYA
RIVER LA FROM 20 TO 60 NM-
COASTAL WATERS FROM SOUTHWEST PASS OF THE MISSISSIPPI RIVER TO
PORT FOURCHON LOUISIANA FROM 20 TO 60 NM-
COASTAL WATERS FROM STAKE ISLAND LA TO SOUTHWEST PASS OF THE
MISSISSIPPI RIVER FROM 20 TO 60 NM-
COASTAL WATERS FROM PASCAGOULA MISSISSIPPI TO STAKE ISLAND
LOUISIANA OUT 20 TO 60 NM-POINTE COUPEE-WEST FELICIANA-
EAST FELICIANA-ST. HELENA-WASHINGTON-ST. TAMMANY-IBERVILLE-
WEST BATON ROUGE-EAST BATON ROUGE-ASCENSION-LIVINGSTON-ASSUMPTION-
ST. JAMES-ST. JOHN THE BAPTIST-UPPER LAFOURCHE-ST. CHARLES-
UPPER JEFFERSON-ORLEANS-UPPER PLAQUEMINES-UPPER ST. BERNARD-
UPPER TERREBONNE-LOWER TERREBONNE-LOWER LAFOURCHE-LOWER JEFFERSON-
LOWER PLAQUEMINES-LOWER ST. BERNARD-NORTHERN TANGIPAHOA-
SOUTHERN TANGIPAHOA-WILKINSON-AMITE-PIKE-WALTHALL-PEARL RIVER-
HANCOCK-HARRISON-JACKSON-
430 PM CST FRI JAN 20 2017

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST
LOUISIANA...SOUTH MISSISSIPPI AND THE ADJACENT COASTAL WATERS.

.DAY ONE...TONIGHT

AN ENHANCED RISK OF SEVERE THUNDERSTORMS EXISTS TONIGHT BEGINNING
LATE THIS EVENING. DAMAGING WINDS...LARGE HAIL AND TORNADOES WILL
ALL BE POSSIBLE ALONG WITH HEAVY RAINFALL. PLEASE STAY CURRENT ON
FORECASTS CONCERNING THIS SEVERE WEATHER SCENARIO.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

A SLIGHT RISK OF SEVERE THUNDERSTORMS WILL EXIST SATURDAY AND
SATURDAY NIGHT. ALL MODES OF SEVERE WEATHER...DAMAGING WINDS...LARGE
HAIL AND TORNADOES WILL BE POSSIBLE ALONG WITH HEAVY RAINFALL.
PLEASE STAY CURRENT ON FORECASTS CONCERNING THIS SEVERE WEATHER
SCENARIO.

A GALE WATCH HAS BEEN POSTED STARTING SUNDAY MORNING THROUGH
SUNDAY NIGHT.

.SPOTTER INFORMATION STATEMENT...

THE ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS...AND
EMERGENCY MANAGEMENT PERSONNEL IN SUPPORT OF SEVERE WEATHER
OPERATIONS MAY BE NEEDED TONIGHT THROUGH SATURDAY NIGHT.

11

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 20, 10:53 PM CST	Dense Fog Advisory	LIX		4 hr
Jan 20, 11:43 PM CST	Tornado Warning	LIX	Wilkinson	32 min
Jan 21, 12:26 AM CST	Tornado Warning	LIX	Amite, Wilkinson	14 min
Jan 21, 12:51 AM CST	Special Weather Statement	LIX	Wilkinson	39 min
Jan 21, 1:06 AM CST	Severe Thunderstorm Warning	LIX	Wilkinson	24 min
Jan 21, 1:14 AM CST	Tornado Warning	LIX	Wilkinson	31 min
Jan 21, 1:29 AM CST	Severe Thunderstorm Warning	LIX	Wilkinson	31 min
Jan 21, 1:41 AM CST	Severe Thunderstorm Warning	LIX	Wilkinson	34 min
Jan 21, 1:48 AM CST	Special Weather Statement	LIX	Amite	27 min
Jan 21, 2:14 AM CST	Severe Thunderstorm Warning	LIX	Amite, Wilkinson	46 min
Jan 21, 2:28 AM CST	Severe Thunderstorm Warning	LIX	Walthall	32 min
Jan 21, 2:57 AM CST	Severe Thunderstorm Warning	LIX	Walthall	33 min
Jan 21, 2:57 AM CST	Severe Thunderstorm Warning	LIX	Amite, Pike, Walthall	48 min
Jan 21, 3:02 AM CST	Tornado Warning	LIX	Walthall	13 min
Jan 21, 3:04 AM CST	Tornado Warning	LIX	Walthall	15 min
Jan 21, 4:43 AM CST	Special Weather Statement	LIX	Pearl River	62 min
Jan 21, 5:22 AM CST	Severe Thunderstorm Warning	LIX	Hancock, Pearl River	38 min
Jan 21, 6:00 AM CST	Special Weather Statement	LIX	Hancock, Harrison	30 min
Jan 21, 8:59 AM CST	Special Weather Statement	LIX	Jackson	31 min
Jan 21, 11:03 AM CST	River Flood Warning	LIX	Hancock, Pearl River	13 days
Jan 21, 5:16 PM CST	Severe Thunderstorm Warning	LIX	Hancock	29 min
Jan 21, 5:47 PM CST	Severe Thunderstorm Warning	LIX	Wilkinson	28 min
Jan 21, 5:51 PM CST	Special Weather Statement	LIX	Hancock	39 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 2017 Every severe thunderstorm warning 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.