Alert archive / Mississippi / Special Weather Statements in 2017

Special Weather Statement, NWS Memphis, TN

July 1, 2017Coahoma County, Quitman County, Mississippi

NWS Memphis, TN issued this special weather statement at Jul 1, 2017, 8:08 PM CDT for Coahoma County, Quitman County, Mississippi. It was in force for 37 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: Jul 1, 2017, 8:08 PM CDT (01:08 UTC)
Expired: Jul 1, 2017, 8:45 PM CDT
In force: 37 min
Issued by: NWS Memphis, TN

Counties Coahoma County, MS, Quitman County, MS

The radar

The Memphis radar (KNQA), 146 km from the middle of the area, began a volume at 01:11 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

Jackson, MS (KJAN), launched 00:00Z, 1.1 hours before the alert went out and 207 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: 657 J/kg
Mixed-layer CIN: -58 J/kg
Mixed-layer LCL: 631 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: -75 m²/s²
0-3 km storm-relative helicity: -41 m²/s²
Significant tornado parameter: -0.1
Supercell composite: -0.8

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 Jul 1, 6:58 PM CDT, 1 hour 10 minutes earlier.

Area forecast discussion, Jul 1, 6:58 PM CDT, 1 hour 10 minutes before

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Hazardous weather outlook, Jul 1, 3:32 PM CDT, 4 hours 36 minutes before

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In the hours before

Special weather statement, Jul 1, 2:47 PM CDT, 5 hours 21 minutes before

Special Weather Statement
National Weather Service Memphis TN
247 PM CDT SAT JUL 1 2017

ARZ008-017-012030-
Lawrence AR-Randolph AR-
247 PM CDT SAT JUL 1 2017

...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED UNTIL 330 PM CDT
FOR...

Central Lawrence County in eastern Arkansas...
Southern Randolph County in eastern Arkansas...

At 247 PM CDT...a strong thunderstorm producing pea size hail or
larger and winds at least 40 mph was located over Ravenden, or 14
miles northwest of Black Rock, moving southeast at 30 mph.

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

People in central Lawrence and southern Randolph Counties should
monitor this storm closely.

LAT...LON 3623 9135 3623 9133 3624 9133 3624 9126
      3633 9126 3634 9128 3636 9128 3638 9126
      3616 9081 3615 9081 3614 9076 3611 9077
      3608 9082 3603 9084 3591 9095 3621 9135
TIME...MOT...LOC 1947Z 307DEG 25KT 3627 9126

WLC

Local storm report, Jul 1, 3:25 PM CDT, 4 hours 43 minutes before

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Special weather statement, Jul 1, 3:31 PM CDT, 4 hours 37 minutes before

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Special weather statement, Jul 1, 8:08 PM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 1, 9:42 PM CDT	Special Weather Statement	MEG	Poinsett	33 min

Nearby

Special Weather Statements in Mississippi, 2017 Every special weather statement 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.