Alert archive / Tennessee / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 13, NWS Memphis, TN

March 31, 2015Hardin County, McNairy County, Tennessee; Tishomingo County, Mississippi

NWS Memphis, TN issued this severe thunderstorm warning at Mar 31, 2015, 6:21 PM CDT for Hardin County, McNairy County, Tennessee; Tishomingo County, Mississippi. It was in force for 39 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Mar 31, 2015, 6:21 PM CDT (23:21 UTC)
Expired: Mar 31, 2015, 7:00 PM CDT
In force: 39 min
Issued by: NWS Memphis, TN
Area: Storm-based polygon

Counties Tishomingo County, MS, Hardin County, TN, McNairy County, TN

The radar

The Columbus AFB radar (KGWX), 125 km from the middle of the area, began a volume at 23:23 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.

What was reported inside it

Time	Report	Where	Remark
Mar 31, 6:40 PM CDT	HAIL 0.75	15 S Savannah, TN	PENNY SIZE HAIL FELL FOR ABOUT 5 MINUTES.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
Mar 31, 5:13 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Mar 31, 1:45 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Little Rock, AR (KBYH), launched 12:00Z, 11.4 hours before the alert went out and 161 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: 836 J/kg
Mixed-layer CIN: -130 J/kg
Mixed-layer LCL: 924 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 179 m²/s²
0-3 km storm-relative helicity: 192 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.7

Open this sounding in Storm Lab

The text

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

617 
WUUS54 KMEG 312321
SVRMEG
MSC141-TNC071-109-010000-
/O.NEW.KMEG.SV.W.0013.150331T2321Z-150401T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MEMPHIS TN
621 PM CDT TUE MAR 31 2015

THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN TISHOMINGO COUNTY IN NORTHEASTERN MISSISSIPPI...
  SOUTHERN HARDIN COUNTY IN SOUTHWESTERN TENNESSEE...
  SOUTHEASTERN MCNAIRY COUNTY IN SOUTHWESTERN TENNESSEE...

* UNTIL 700 PM CDT

* AT 620 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  PRODUCING LARGE DAMAGING HAIL UP TO GOLF BALL SIZE AND DAMAGING
  WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED OVER PICKWICK
  LANDING STATE PARK...AND MOVING EAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  SELMER...J P COLEMAN STATE PARK...PICKWICK LANDING STATE PARK...
  ADAMSVILLE...SHILOH...PINEFLAT...WALNUT GROVE...PICKWICK DAM...
  BETHEL SPRINGS...EASTVIEW...MICHIE...GUYS...STANTONVILLE...
  LOWRYVILLE...CAFFEY...POLLARDS MILL...FORTY FORKS...RED SULPHUR
  SPRINGS...HICKORY FLATS AND OLD LAWTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION...MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY. LIGHTNING IS ONE OF NATURES LEADING KILLERS. REMEMBER...
IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY
LIGHTNING.

&&

LAT...LON 3501 8799 3501 8820 3492 8816 3489 8810
      3487 8810 3494 8836 3500 8837 3500 8855
      3527 8861 3515 8799 3515 8798
TIME...MOT...LOC 2320Z 278DEG 16KT 3502 8823 

$$

The office that day

Everything else NWS Memphis, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 31, 11:39 AM CDT	River Flood Advisory	MEG	Dyer, Lake, Lauderdale	4 days
Mar 31, 5:47 PM CDT	Severe Thunderstorm Warning	MEG	Hardin, McNairy	43 min
Mar 31, 5:55 PM CDT	Severe Thunderstorm Warning	MEG	Dyer, Lake, Obion	50 min
Mar 31, 6:09 PM CDT	Flash Flood Warning	MEG	Hardin, McNairy	6 hr
Mar 31, 6:54 PM CDT	Severe Thunderstorm Warning	MEG	Hardin, McNairy	51 min
Mar 31, 3:09 PM CDT	Special Weather Statement	MEG	Yalobusha	36 min
Mar 31, 3:17 PM CDT	Severe Thunderstorm Warning	MEG	Coahoma	43 min
Mar 31, 3:17 PM CDT	Severe Thunderstorm Warning	MEG	Calhoun, Yalobusha	28 min
Mar 31, 3:22 PM CDT	Special Weather Statement	MEG	Tishomingo	38 min
Mar 31, 3:46 PM CDT	Severe Thunderstorm Warning	MEG	Calhoun, Yalobusha	12 min
Mar 31, 3:57 PM CDT	Severe Thunderstorm Warning	MEG	Coahoma, Quitman, Tallahatchie	48 min
Mar 31, 4:28 PM CDT	Severe Thunderstorm Warning	MEG	Calhoun, Chickasaw, Lafayette, Pontotoc	47 min
Mar 31, 5:17 PM CDT	Severe Thunderstorm Warning	MEG	Union	43 min
Mar 31, 5:55 PM CDT	Severe Thunderstorm Warning	MEG	Lee, Prentiss, Tippah, Union	28 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2015 Severe Thunderstorm Warnings in Mississippi, 2015 Every severe thunderstorm warning in 2015

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.