Alert archive / Oklahoma / Special Weather Statements in 2019

Special Weather Statement, NWS Norman, OK

May 18, 2019Logan County, Oklahoma

NWS Norman, OK issued this special weather statement at May 18, 2019, 10:21 PM CDT for Logan County, Oklahoma. It was in force for 24 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 18, 2019, 10:21 PM CDT (03:21 UTC)
Expired: May 18, 2019, 10:45 PM CDT
In force: 24 min
Issued by: NWS Norman, OK

County Logan County, OK

The radar

The Norman radar (KTLX), 78 km from the middle of the area, began a volume at 03:21 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

Norman, OK (KOUN), launched 00:00Z, 3.4 hours before the alert went out and 87 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: 200 J/kg
Mixed-layer CIN: -330 J/kg
Mixed-layer LCL: 1107 m above ground
0-6 km bulk shear: 77 kt
0-1 km storm-relative helicity: 92 m²/s²
0-3 km storm-relative helicity: 131 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 Norman, OK wrote its last area forecast discussion before this special weather statement went out at May 18, 4:11 PM CDT, 6 hours 10 minutes earlier.

Area forecast discussion, May 18, 4:11 PM CDT, 6 hours 10 minutes before

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Hazardous weather outlook, May 18, 11:48 AM CDT, 10 hours 33 minutes before

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In the hours before

Local storm report, May 18, 8:53 PM CDT, 1 hour 28 minutes before

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Local storm report, May 18, 9:02 PM CDT, 1 hour 19 minutes before

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Special weather statement, May 18, 9:33 PM CDT, 48 minutes before

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Special weather statement, May 18, 9:40 PM CDT, 41 minutes before

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Special weather statement, May 18, 10:11 PM CDT, 10 minutes before

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Special weather statement, May 18, 10:21 PM CDT, 0 minutes before

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The office that day

Everything else NWS Norman, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 18, 7:05 PM CDT	Special Weather Statement	OUN	Harper	25 min
May 18, 7:28 PM CDT	Severe Thunderstorm Warning	OUN	Grant	47 min
May 18, 7:30 PM CDT	Special Weather Statement	OUN	Harper	30 min
May 18, 7:58 PM CDT	Special Weather Statement	OUN	Woodward	32 min
May 18, 8:03 PM CDT	Special Weather Statement	OUN	Alfalfa	27 min
May 18, 8:11 PM CDT	Special Weather Statement	OUN	Alfalfa, Woods	34 min
May 18, 8:24 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Grant	51 min
May 18, 8:30 PM CDT	Special Weather Statement	OUN	Woods	30 min
May 18, 8:51 PM CDT	Special Weather Statement	OUN	Alfalfa, Major	24 min
May 18, 8:56 PM CDT	Severe Thunderstorm Warning	OUN	Grant	17 min
May 18, 9:07 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Major	38 min
May 18, 9:33 PM CDT	Special Weather Statement	OUN	Grant	27 min
May 18, 9:40 PM CDT	Special Weather Statement	OUN	Garfield	35 min
May 18, 9:48 PM CDT	Severe Thunderstorm Warning	OUN	Grant	42 min
May 18, 10:09 PM CDT	Severe Thunderstorm Warning	OUN	Kay	51 min
May 18, 10:11 PM CDT	Special Weather Statement	OUN	Garfield	34 min
May 18, 10:38 PM CDT	Severe Thunderstorm Warning	OUN	Kay	52 min
May 18, 10:42 PM CDT	Special Weather Statement	OUN	Noble	33 min
May 18, 10:47 PM CDT	Special Weather Statement	OUN	Logan, Payne	28 min
May 19, 11:36 AM CDT	Flood Watch	OUN	Alfalfa, Atoka, Beckham, Blaine, Bryan, Caddo and 42 more	49 hr

Nearby

Special Weather Statements in Oklahoma, 2019 Every special weather statement in 2019

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.