Alert archive / Arkansas / Special Weather Statements in 2012

Special Weather Statement, NWS Memphis, TN

May 20, 2012Mississippi County, Arkansas

NWS Memphis, TN issued this special weather statement at May 20, 2012, 7:49 PM CDT for Mississippi County, Arkansas. It was in force for 26 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: May 20, 2012, 7:49 PM CDT (00:49 UTC)
Expired: May 20, 2012, 8:15 PM CDT
In force: 26 min
Issued by: NWS Memphis, TN

County Mississippi County, AR

The radar

The Memphis radar (KNQA), 67 km from the middle of the area, began a volume at 00:51 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 00:00Z, 0.8 hours before the alert went out and 121 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: 582 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 1970 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 15 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Memphis, TN wrote its last area forecast discussion before this special weather statement went out at May 20, 6:51 PM CDT, 58 minutes earlier.

Area forecast discussion, May 20, 6:51 PM CDT, 58 minutes before

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Hazardous weather outlook, May 20, 3:53 PM CDT, 3 hours 56 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE MEMPHIS TN
353 PM CDT SUN MAY 20 2012

ARZ008-009-017-018-026>028-035-036-048-049-058-MOZ113-115-
MSZ001>017-020>024-TNZ001>004-019>021-048>055-088>092-211100-
ALCORN-BENTON MS-CALHOUN-CARROLL-CHESTER-CHICKASAW-CLAY-COAHOMA-
CRAIGHEAD-CRITTENDEN-CROCKETT-CROSS-DESOTO-DECATUR-DUNKLIN-DYER-
FAYETTE-GIBSON-GREENE-HARDEMAN-HARDIN-HAYWOOD-HENDERSON-HENRY-
ITAWAMBA-LAFAYETTE-LAKE-LAUDERDALE-LAWRENCE-LEE AR-LEE MS-MADISON-
MARSHALL-MCNAIRY-MISSISSIPPI-MONROE-OBION-PANOLA-PEMISCOT-
PHILLIPS-POINSETT-PONTOTOC-PRENTISS-QUITMAN-RANDOLPH-SHELBY-
ST. FRANCIS-TALLAHATCHIE-TATE-TIPPAH-TIPTON-TISHOMINGO-TUNICA-
UNION-WEAKLEY-YALOBUSHA-
353 PM CDT SUN MAY 20 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST ARKANSAS...
THE MISSOURI BOOTHEEL...NORTH MISSISSIPPI...AND WEST TENNESSEE.

.DAY ONE...TODAY AND TONIGHT

A COLD FRONT WILL APPROACH THE MID SOUTH TONIGHT. A FEW STRONG
THUNDERSTORMS AND PERHAPS AN ISOLATED SEVERE THUNDERSTORM ALONG THE
MISSISSIPPI RIVER THIS EVENING AND ACROSS THE ENTIRE MIDSOUTH
TONIGHT. DAMAGING WINDS UP TO 60 MPH IS THE MAIN THREAT WITH ANY
THUNDERSTORM THAT REACHES SEVERE LIMITS.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

A FEW STRONG THUNDERSTORMS TO PERHAPS AN ISOLATED SEVERE
THUNDERSTORM ARE POSSIBLE ALONG AND SOUTH OF INTERSTATE 40 MONDAY
AFTERNOON.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME.

In the hours before

Special weather statement, May 20, 7:06 PM CDT, 43 minutes before

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Special weather statement, May 20, 7:20 PM CDT, 29 minutes before

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Local storm report, May 20, 7:38 PM CDT, 11 minutes before

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Special weather statement, May 20, 7:38 PM CDT, 11 minutes before

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Special weather statement, May 20, 7:45 PM CDT, 4 minutes before

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Special weather statement, May 20, 7:49 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MEMPHIS TN
749 PM CDT SUN MAY 20 2012

ARZ026-028-210115-
CRAIGHEAD AR-MISSISSIPPI AR-
749 PM CDT SUN MAY 20 2012

...THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY UNTIL 815 PM CDT FOR...

  NORTHEASTERN CRAIGHEAD COUNTY IN EASTERN ARKANSAS...
  NORTHWESTERN MISSISSIPPI COUNTY IN EASTERN ARKANSAS...

A STRONG THUNDERSTORM PRODUCING HAIL UP TO DIME SIZE AND WIND GUSTS
TO 45 MPH WAS LOCATED 5 MILES SOUTHWEST OF LEACHVILLE AT 749 PM
CDT... MOVING EAST AT 10 MPH.

PEOPLE IN CRAIGHEAD AND MISSISSIPPI COUNTIES...INCLUDING LOCATIONS
NEAR LEACHVILLE AND MANILA...SHOULD MONITOR THIS STORM CLOSELY. THIS
SIGNIFICANT WEATHER ALERT ALSO INCLUDES BIG LAKE.

&&

LAT...LON 3600 8999 3575 8998 3580 9035 3598 9034
TIME...MOT...LOC 0049Z 267DEG 10KT 3586 9029

The office that day

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

Issued	Product	Office	Counties	Lasted
May 20, 7:06 PM CDT	Special Weather Statement	MEG	Tallahatchie	24 min
May 20, 8:11 PM CDT	Special Weather Statement	MEG	Panola	34 min
May 20, 8:32 PM CDT	Special Weather Statement	MEG	Tate	28 min
May 21, 2:59 PM CDT	Severe Thunderstorm Warning	MEG	Calhoun	31 min
May 20, 7:45 PM CDT	Special Weather Statement	MEG	Carroll	30 min
May 20, 8:06 PM CDT	Special Weather Statement	MEG	Carroll	24 min
May 20, 8:52 PM CDT	Special Weather Statement	MEG	Carroll	23 min
May 20, 9:13 PM CDT	Special Weather Statement	MEG	Henderson	32 min
May 20, 7:03 PM CDT	Special Weather Statement	MEG	Crittenden	27 min
May 20, 7:20 PM CDT	Special Weather Statement	MEG	Mississippi	25 min
May 20, 7:38 PM CDT	Special Weather Statement	MEG	Mississippi	37 min

Nearby

Special Weather Statements in Arkansas, 2012 Every special weather statement in 2012

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.