Alert archive / Mississippi / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 2, NWS Memphis, TN

January 21, 2017Chickasaw County, Mississippi

NWS Memphis, TN issued this severe thunderstorm warning at Jan 21, 2017, 10:52 PM CST for Chickasaw County, Mississippi. It was in force for 23 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, 10:52 PM CST (04:52 UTC)
Expired: Jan 21, 2017, 11:15 PM CST
In force: 23 min
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Chickasaw County, MS

The radar

The Columbus AFB radar (KGWX), 65 km from the middle of the area, began a volume at 04:52 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 nearest sounding before it

Little Rock, AR (KBYH), launched 00:00Z, 4.9 hours before the alert went out and 131 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: 656 J/kg
Mixed-layer CIN: -107 J/kg
Mixed-layer LCL: 1015 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 102 m²/s²
0-3 km storm-relative helicity: 121 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

As transmitted.

868 
WUUS54 KMEG 220452
SVRMEG
MSC017-220515-
/O.NEW.KMEG.SV.W.0002.170122T0452Z-170122T0515Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Memphis TN
1052 PM CST SAT JAN 21 2017

The National Weather Service in Memphis has issued a

* Severe Thunderstorm Warning for...
  Northwestern Chickasaw County in northeastern Mississippi...

* Until 1115 PM CST

* At 1052 PM CST, a severe thunderstorm was located over Houston,
  moving north at 25 mph.

  HAZARD...Quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Damage to vehicles is expected. 

* Locations impacted include...
  Houston, Pyland, Houlka, New Houlka, Tabbville, Thorn, Van Vleet,
  Parkersburg and Thelma.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3384 8914 3407 8914 3408 8882 3382 8893
TIME...MOT...LOC 0452Z 186DEG 21KT 3391 8903 

HAIL...1.00IN
WIND...<50MPH
 
$$

1 follow-up statement

290 
WWUS54 KMEG 220517
SVSMEG

Severe Weather Statement
National Weather Service Memphis TN
1117 PM CST SAT JAN 21 2017

MSC017-220527-
/O.EXP.KMEG.SV.W.0002.000000T0000Z-170122T0515Z/
Chickasaw MS-
1117 PM CST SAT JAN 21 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CHICKASAW COUNTY
HAS EXPIRED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been allowed to expire.  However small
hail is still possible with this thunderstorm.

LAT...LON 3384 8914 3407 8914 3408 8882 3382 8893
TIME...MOT...LOC 0517Z 186DEG 21KT 3405 8901 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 21, 10:45 PM CST	Severe Thunderstorm Warning	MEG	Tallahatchie	45 min
Jan 21, 11:09 PM CST	Severe Thunderstorm Warning	MEG	Panola, Quitman	38 min
Jan 21, 11:14 PM CST	Severe Thunderstorm Warning	MEG	Panola, Tallahatchie, Yalobusha	33 min
Jan 21, 11:23 PM CST	Severe Thunderstorm Warning	MEG	Pontotoc	22 min
Jan 22, 4:45 AM CST	Wind Advisory	MEG	Coahoma, DeSoto, Marshall, Panola, Quitman, Tallahatchie and 2 more	22 hr
Jan 22, 11:23 AM CST	River Flood Warning	MEG	Monroe	33 hr
Jan 22, 11:23 AM CST	River Flood Warning	MEG	Lowndes, Monroe	5 days

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; radar from the NEXRAD Level II archive.