Alert archive / Arkansas / Special Weather Statements in 2021

Special Weather Statement, NWS Memphis, TN

April 28, 2021Clay County, Arkansas

NWS Memphis, TN issued this special weather statement at Apr 28, 2021, 2:50 PM CDT for Clay County, Arkansas. It was in force for 25 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: Apr 28, 2021, 2:50 PM CDT (19:50 UTC)
Expired: Apr 28, 2021, 3:15 PM CDT
In force: 25 min
Issued by: NWS Memphis, TN

County Clay County, AR

The radar

The Memphis radar (KNQA), 127 km from the middle of the area, began a volume at 19:52 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 (KLZK), launched 12:00Z, 7.8 hours before the alert went out and 177 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: 845 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 593 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 122 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 1.7

Open this sounding in Storm Lab

The text

As transmitted.

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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 Apr 28, 12:42 PM CDT, 2 hours 8 minutes earlier.

Area forecast discussion, Apr 28, 12:42 PM CDT, 2 hours 8 minutes before

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Hazardous weather outlook, Apr 28, 12:36 PM CDT, 2 hours 14 minutes before

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In the hours before

Special weather statement, Apr 28, 2:50 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service Memphis TN
250 PM CDT Wed Apr 28 2021

ARZ009-018-MOZ113-282015-
Greene AR-Clay AR-Dunklin MO-
250 PM CDT Wed Apr 28 2021

...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED UNTIL 315 PM CDT
FOR...

Northwestern Greene County in eastern Arkansas...
Clay County in eastern Arkansas...
Northeastern Dunklin County in southeastern Missouri...

At 250 PM CDT...a strong thunderstorm producing winds in excess of 30
mph was located near College City, or near Pocahontas, moving
northeast at 55 mph.

Very heavy rain along with continuous cloud to ground lightning are
also possible with this thunderstorm.

People in northwestern Greene...Clay and northeastern Dunklin
Counties should monitor this storm closely.

LAT...LON 3663 8996 3646 8996 3598 9085 3599 9086
      3608 9082 3615 9075 3615 9081 3629 9081
      3630 9079 3628 9075 3641 9075 3643 9078
      3650 9076 3650 9022 3663 9015
TIME...MOT...LOC 1950Z 239DEG 48KT 3618 9091

SGW

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 28, 4:38 PM CDT	Special Weather Statement	MEG	Obion	37 min
Apr 28, 5:06 PM CDT	Severe Thunderstorm Warning	MEG	Obion, Weakley	54 min
Apr 28, 5:39 PM CDT	Special Weather Statement	MEG	Weakley	51 min
Apr 28, 5:48 PM CDT	Severe Thunderstorm Warning	MEG	Henry, Weakley	42 min
Apr 28, 6:11 PM CDT	Tornado Warning	MEG	Henry, Weakley	49 min
Apr 28, 6:54 PM CDT	Tornado Warning	MEG	Henry	51 min
Apr 28, 3:32 PM CDT	Special Weather Statement	MEG	Clay	28 min

Nearby

Special Weather Statements in Arkansas, 2021 Every special weather statement in 2021

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.