Alert archive / Mississippi / Tornado Warnings in 2017

Tornado Warning 27, NWS Memphis, TN

April 30, 2017Calhoun County, Mississippi

NWS Memphis, TN issued this tornado warning at Apr 30, 2017, 10:25 AM CDT for Calhoun County, Mississippi. It was in force for 39 min. 4 reports 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
Apr 30, 2017, 10:25 AM CDT (15:25 UTC)
Expired
Apr 30, 2017, 11:04 AM CDT
In force
39 min
Issued by
NWS Memphis, TN
Area
Storm-based polygon
Tornado
Radar indicated
Hail
1.0 in

County Calhoun County, MS

The radar

The Columbus AFB radar (KGWX), 92 km from the middle of the area, began a volume at 15:25 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

TimeReportWhereRemark
Apr 30, 10:26 AM CDTTORNADO3 Se Sabougla, MSTORNADO BEGAN APPROXIMATELY 4 MILES WEST OF SLATE SPRINGS...LIFTING 1 MILE NORTHEAST OF SABOUGLA. THIS TORNADO WAS RATED EF1 WITH A PATH LENGTH OF 2.7 MILES AND A MAXIMUM PATH WIDE OF 50 YARDS. SEVERAL OUTBUILDINGS WERE DAMAGED OR DESTROYED AND NUMEROUS TREES
Apr 30, 10:30 AM CDTTSTM WND DMGSlate Spring, MSTREE DAMAGE AND A FUNNEL CLOUD REPORTED. POSSIBLE TORNADO DAMAGE.
Apr 30, 10:35 AM CDTTSTM WND DMG2 Sw Calhoun City, MSROOF DAMAGE NEAR HWY 8/9 INTERSECTION.
Apr 30, 10:40 AM CDTTSTM WND DMGBruce, MSMULTIPLE TREES DOWN ACROSS THE COUNTY, ROOFS OFF OF A COUPLE OF HOUSES.

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

The nearest sounding before it

Little Rock, AR (KBYH), launched 12:00Z, 3.4 hours before the alert went out and 112 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, Little Rock, AR at 12:00Z on 2017-04-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 6 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, Little Rock, AR at 12:00Z on 2017-04-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -47 square meters per square second.19395878Sfc1 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
6 J/kg
Mixed-layer CIN
-292 J/kg
Mixed-layer LCL
811 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
-47 m²/s²
0-3 km storm-relative helicity
91 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

As transmitted.

780 
WFUS54 KMEG 301525
TORMEG
MSC013-301615-
/O.NEW.KMEG.TO.W.0027.170430T1525Z-170430T1615Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Memphis TN
1025 AM CDT SUN APR 30 2017

The National Weather Service in Memphis has issued a

* Tornado Warning for...
  Calhoun County in northeastern Mississippi...

* Until 1115 AM CDT
    
* At 1025 AM CDT, a severe thunderstorm producing a tornado was
  located near Sabougla, or 19 miles northeast of Winona, moving
  northeast at 55 mph.

  HAZARD...Tornado and quarter size hail. 

  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...
  Slate Springs around 1035 AM CDT. 
  Calhoun City around 1040 AM CDT. 
  Derma and Pittsboro around 1045 AM CDT. 
  Bruce around 1050 AM CDT. 

Other locations impacted by this tornadic thunderstorm include
Shepherd, Skuna, Bounds, Retreat, Reid, Loyd, Ellard, Dentontown,
Sarepta and Big Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a storm shelter 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 3387 8951 3415 8938 3415 8924 3408 8924
      3407 8914 3403 8914 3372 8927 3372 8951
TIME...MOT...LOC 1525Z 211DEG 49KT 3369 8948 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$
2 follow-up statements
460 
WWUS54 KMEG 301545
SVSMEG

Severe Weather Statement
National Weather Service Memphis TN
1045 AM CDT SUN APR 30 2017

MSC013-301615-
/O.CON.KMEG.TO.W.0027.000000T0000Z-170430T1615Z/
Calhoun MS-
1045 AM CDT SUN APR 30 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1115 AM CDT FOR CENTRAL
CALHOUN COUNTY...
    
At 1044 AM CDT, a severe thunderstorm producing a tornado was located
near Pittsboro, or 20 miles southeast of Water Valley, moving north
at 55 mph.

HAZARD...Tornado and quarter size hail. 

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...
  Bruce around 1050 AM CDT. 
  Banner around 1055 AM CDT. 

Other locations impacted by this tornadic thunderstorm include
Shepherd, Skuna, Bounds, Retreat, Reid, Loyd, Ellard, Sarepta and Big
Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a storm shelter 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 3387 8951 3415 8938 3415 8924 3408 8924
      3407 8914 3403 8914 3380 8930 3383 8944
TIME...MOT...LOC 1544Z 201DEG 47KT 3393 8940 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$
656 
WWUS54 KMEG 301604
SVSMEG

Severe Weather Statement
National Weather Service Memphis TN
1104 AM CDT SUN APR 30 2017

MSC013-301614-
/O.CAN.KMEG.TO.W.0027.000000T0000Z-170430T1615Z/
Calhoun MS-
1104 AM CDT SUN APR 30 2017

...THE TORNADO WARNING FOR CENTRAL CALHOUN COUNTY IS CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning has been cancelled.

A tornado watch remains in effect until 700 PM CDT for northeastern
and northwestern Mississippi.

LAT...LON 3387 8951 3415 8938 3415 8924 3408 8924
      3407 8914 3403 8914 3380 8930 3383 8944
TIME...MOT...LOC 1601Z 211DEG 49KT 3417 8923 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 29, 7:39 PM CDTSpecial Weather StatementMEGDeSoto, Quitman, Tate51 min
Apr 29, 7:41 PM CDTSpecial Weather StatementMEGDeSoto, Quitman, Tate49 min
Apr 29, 7:43 PM CDTSevere Thunderstorm WarningMEGDeSoto, Panola, Quitman, Tate, Tunica47 min
Apr 29, 8:19 PM CDTRiver Flood WarningMEGTallahatchie47 hr
Apr 29, 8:19 PM CDTRiver Flood WarningMEGLafayette, Marshall, Union53 hr
Apr 29, 8:23 PM CDTSevere Thunderstorm WarningMEGDeSoto, Lafayette, Marshall, Panola, Quitman, Tate67 min
Apr 29, 9:12 PM CDTSevere Thunderstorm WarningMEGDeSoto48 min
Apr 30, 1:15 AM CDTSevere Thunderstorm WarningMEGDeSoto, Tunica45 min
Apr 30, 2:17 AM CDTWind AdvisoryMEGAlcorn, Benton, Calhoun, Chickasaw, Coahoma, DeSoto and 16 more17 hr
Apr 30, 7:38 AM CDTSpecial Weather StatementMEGCoahoma52 min
Apr 30, 9:58 AM CDTSevere Thunderstorm WarningMEGCalhoun, Tallahatchie, Yalobusha62 min
Apr 30, 10:34 AM CDTSevere Thunderstorm WarningMEGLafayette, Panola41 min
Apr 30, 10:50 AM CDTSevere Thunderstorm WarningMEGDeSoto, Marshall, Tate40 min
Apr 30, 10:57 AM CDTSevere Thunderstorm WarningMEGLafayette, Pontotoc, Union48 min
Apr 30, 10:59 AM CDTSevere Thunderstorm WarningMEGLafayette, Pontotoc, Union46 min
Apr 30, 11:36 AM CDTSevere Thunderstorm WarningMEGAlcorn, Benton, Tippah39 min
Apr 30, 12:45 PM CDTRiver Flood WarningMEGMonroe50 hr
Apr 30, 12:45 PM CDTRiver Flood WarningMEGMonroe42 hr
Apr 30, 12:58 PM CDTRiver Flood AdvisoryMEGCoahoma, Tunica4 days

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.