Alert archive / Mississippi / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 13, NWS Memphis, TN

February 21, 2005Quitman County, Mississippi

NWS Memphis, TN issued this severe thunderstorm warning at Feb 21, 2005, 4:56 PM CST for Quitman County, Mississippi. It was in force for 34 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: Feb 21, 2005, 4:56 PM CST (22:56 UTC)
Expired: Feb 21, 2005, 5:30 PM CST
In force: 34 min
Issued by: NWS Memphis, TN
Area: Counties, with a storm outline in the text

County Quitman County, MS

The radar

The Memphis radar (KNQA), 125 km from the middle of the area, began a volume at 22:59 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 (KLZK), launched 12:00Z, 10.9 hours before the alert went out and 70 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: 1442 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 572 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 80 m²/s²
0-3 km storm-relative helicity: 77 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 2.8

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KMEG 212257
SVRMEG
MSC119-212330-
/O.NEW.KMEG.SV.W.0013.050221T2256Z-050221T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MEMPHIS TN
ISSUED BY NATIONAL WEATHER SERVICE LITTLE ROCK AR
456 PM CST MON FEB 21 2005

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MEMPHIS TN
ISSUED BY NATIONAL WEATHER SERVICE LITTLE ROCK AR
456 PM CST MON FEB 21 2005

THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  QUITMAN COUNTY IN NORTHWEST MISSISSIPPI

* UNTIL 530 PM CST

* AT 449 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 8 MILES WEST OF MARKS...OR ABOUT 10 MILES
  NORTHEAST OF CLARKSDALE...MOVING EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  MARKS AROUND 505 PM CST

&&

THE MAIN THREAT WITH THIS STORM IS THREE QUARTER INCH HAIL OR LARGER.
THE HAIL MAY CAUSE SOME VEHICLE OR ROOF DAMAGE. STRONG AND GUSTY
WINDS CAN ALSO BE EXPECTED WITH THIS STORM. FOR YOUR PROTECTION...GO
INDOORS UNTIL THE STORM HAS PASSED.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN MEMPHIS.

LAT...LON 3418 9043 3427 9043 3428 9040 3436 9040
      3436 9022 3435 9020 3431 9020 3427 9015
      3417 9015

$$

46

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 21, 4:49 PM CST	Severe Thunderstorm Warning	MEG	Panola	41 min
Feb 21, 5:17 PM CST	Severe Thunderstorm Warning	MEG	Lafayette	43 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 2005 Every severe thunderstorm warning in 2005

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.