Alert archive / Mississippi / Tornado Warnings in 2013

Tornado Warning 63, NWS Jackson, MS

April 18, 2013Holmes County, Leflore County, Mississippi

NWS Jackson, MS issued this tornado warning at Apr 18, 2013, 6:06 PM CDT for Holmes County, Leflore County, Mississippi. It was in force for 39 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: Apr 18, 2013, 6:06 PM CDT (23:06 UTC)
Expired: Apr 18, 2013, 6:45 PM CDT
In force: 39 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon

Counties Holmes County, MS, Leflore County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 121 km from the middle of the area, began a volume at 23:10 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
Apr 18, 1:43 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 11.1 hours before the alert went out and 115 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: 73 J/kg
Mixed-layer CIN: -438 J/kg
Mixed-layer LCL: 606 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 228 m²/s²
0-3 km storm-relative helicity: 351 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

228 
WFUS54 KJAN 182306
TORJAN
MSC051-083-182345-
/O.NEW.KJAN.TO.W.0063.130418T2306Z-130418T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE JACKSON MS
606 PM CDT THU APR 18 2013

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* TORNADO WARNING FOR...
  LEFLORE COUNTY IN NORTH CENTRAL MISSISSIPPI...
  HOLMES COUNTY IN CENTRAL MISSISSIPPI...

* UNTIL 645 PM CDT

* AT 606 PM CDT...A TORNADO WAS INDICATED NEAR SWIFTOWN MOVING
  NORTHEAST AT 45 MPH.

* THE TORNADO WILL BE NEAR...
  SIDON BY 625 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WARNING MEANS THAT A TORNADO IS OCCURRING OR IMMINENT. YOU
SHOULD ACTIVATE YOUR TORNADO ACTION PLAN AND TAKE COVER NOW.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT THURSDAY EVENING
FOR NORTHEAST LOUISIANA AND MISSISSIPPI.

LAT...LON 3348 9010 3346 9010 3346 9014 3342 9014
      3341 9018 3333 9018 3330 9006 3320 9033
      3331 9034 3328 9037 3324 9038 3324 9042
      3327 9046 3334 9045
TIME...MOT...LOC 2306Z 239DEG 39KT 3326 9040

$$

JA

1 follow-up statement

372 
WWUS54 KJAN 182339
SVSJAN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
639 PM CDT THU APR 18 2013

MSC051-083-182349-
/O.EXP.KJAN.TO.W.0063.000000T0000Z-130418T2345Z/
LEFLORE MS-HOLMES MS-
639 PM CDT THU APR 18 2013

...THE TORNADO WARNING FOR NORTHWESTERN HOLMES AND SOUTHERN LEFLORE
COUNTIES WILL EXPIRE AT 645 PM CDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE STORM THAT PROMPTED THE TORNADO WARNING HAS WEAKENED AND THE
WARNING HAS BEEN ALLOWED TO EXPIRE.

LAT...LON 3348 9010 3346 9010 3346 9014 3342 9014
      3341 9018 3333 9018 3330 9006 3320 9033
      3331 9034 3328 9037 3324 9038 3324 9042
      3327 9046 3334 9045
TIME...MOT...LOC 2339Z 239DEG 39KT 3344 9003

$$

JA

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 18, 9:42 AM CDT	River Flood Warning	JAN	Neshoba	5 days
Apr 18, 3:45 PM CDT	Severe Thunderstorm Warning	JAN	Issaquena, Washington	60 min
Apr 18, 4:24 PM CDT	Tornado Warning	JAN	Washington	51 min
Apr 18, 4:31 PM CDT	Tornado Warning	JAN	Washington	29 min
Apr 18, 4:45 PM CDT	Tornado Warning	JAN	Issaquena	60 min
Apr 18, 4:59 PM CDT	Tornado Warning	JAN	Issaquena	61 min
Apr 18, 5:00 PM CDT	Severe Thunderstorm Warning	JAN	Bolivar, Humphreys, Issaquena, Leflore, Sharkey, Sunflower	75 min
Apr 18, 5:23 PM CDT	Tornado Warning	JAN	Humphreys, Issaquena, Leflore, Sharkey, Sunflower, Washington	52 min
Apr 18, 5:26 PM CDT	Tornado Warning	JAN	Sunflower	34 min
Apr 18, 5:43 PM CDT	Severe Thunderstorm Warning	JAN	Issaquena, Sharkey, Warren	47 min
Apr 18, 5:48 PM CDT	Tornado Warning	JAN	Leflore	42 min
Apr 18, 6:03 PM CDT	Severe Thunderstorm Warning	JAN	Yazoo	72 min
Apr 18, 6:08 PM CDT	Tornado Warning	JAN	Sharkey, Yazoo	67 min
Apr 18, 6:20 PM CDT	Flash Flood Warning	JAN	Sunflower, Washington	3 hr
Apr 18, 6:21 PM CDT	Special Weather Statement	JAN	Grenada	29 min

Nearby

Tornado Warnings in Mississippi, 2013 Every tornado warning in 2013 Tornadoes in 2013

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.