Alert archive / Oklahoma / Flood Watches in 2018

Flood Watch 2, NWS Norman, OK

February 22, 201811 counties in Oklahoma; Clay County, Texas

NWS Norman, OK issued this flood watch at Feb 22, 2018, 3:36 PM CST for 11 counties in Oklahoma; Clay County, Texas. It took effect at Feb 23, 2018, 6:00 AM CST. It was in force for 30 hr.

The area

The counties it named.

The facts

Issued: Feb 22, 2018, 3:36 PM CST (21:36 UTC)
In effect from: Feb 23, 2018, 6:00 AM CST
Expired: Feb 24, 2018, 12:04 PM CST
In force: 30 hr
Issued by: NWS Norman, OK
Flood severity: None

Counties Atoka County, OK, Bryan County, OK, Carter County, OK, Coal County, OK, Hughes County, OK, Jefferson County, OK, Johnston County, OK, Love County, OK, Marshall County, OK, Murray County, OK, Pontotoc County, OK, Clay County, TX

The radar

The Norman radar (KTLX), 120 km from the middle of the area, began a volume at 21:37 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

Fort Worth, TX (KFWD), launched 12:00Z, 9.6 hours before the alert went out and 168 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: 5 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 405 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 341 m²/s²
0-3 km storm-relative helicity: 344 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flood watch 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 flood watch went out at Feb 22, 3:20 PM CST, 16 minutes earlier.

Area forecast discussion, Feb 22, 3:20 PM CST, 16 minutes before

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Hazardous weather outlook, Feb 22, 12:02 PM CST, 3 hours 34 minutes before

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In the hours before

Special weather statement, Feb 22, 9:55 AM CST, 5 hours 41 minutes before

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Local storm report, Feb 22, 10:19 AM CST, 5 hours 17 minutes before

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Local storm report, Feb 22, 11:16 AM CST, 4 hours 20 minutes before

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Local storm report, Feb 22, 11:17 AM CST, 4 hours 19 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
Feb 22, 7:57 AM CST	Special Weather Statement	OUN	Tillman	33 min
Feb 22, 8:49 AM CST	Special Weather Statement	OUN	Cotton	26 min
Feb 22, 9:24 AM CST	Special Weather Statement	OUN	Comanche, Cotton	36 min
Feb 22, 9:55 AM CST	Special Weather Statement	OUN	Stephens	35 min
Feb 22, 7:22 AM CST	Special Weather Statement	OUN	Foard	23 min
Feb 22, 7:33 AM CST	Special Weather Statement	OUN	Wilbarger	27 min
Feb 22, 7:38 AM CST	Special Weather Statement	OUN	Baylor	37 min
Feb 22, 7:44 AM CST	Special Weather Statement	OUN	Foard, Hardeman	46 min
Feb 22, 8:00 AM CST	Severe Thunderstorm Warning	OUN	Baylor, Knox	30 min
Feb 22, 8:17 AM CST	Special Weather Statement	OUN	Baylor, Knox	43 min
Feb 22, 8:23 AM CST	Special Weather Statement	OUN	Wichita	37 min
Feb 22, 9:12 AM CST	Special Weather Statement	OUN	Wichita	33 min

Nearby

Flood Watches in Oklahoma, 2018 Flood Watches in Texas, 2018 Every flood watch in 2018

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.