Alert archive / Oklahoma / Flood Watches in 2018

Flood Watch 3, NWS Norman, OK

March 26, 201821 counties in Oklahoma; 4 counties in Texas

NWS Norman, OK issued this flood watch at Mar 26, 2018, 11:30 AM CDT for 21 counties in Oklahoma; 4 counties in Texas. It took effect at Mar 26, 2018, 7:00 PM CDT. It was in force for 30 hr.

The area

The counties it named.

The facts

Issued: Mar 26, 2018, 11:30 AM CDT (16:30 UTC)
In effect from: Mar 26, 2018, 7:00 PM CDT
Expired: Mar 28, 2018, 1:00 AM CDT
In force: 30 hr
Issued by: NWS Norman, OK
Flood severity: None

All 25 counties

Atoka County, OK, Bryan County, OK, Carter County, OK, Cleveland County, OK, Coal County, OK, Cotton County, OK, Garvin County, OK, Grady County, OK, Hughes County, OK, Jefferson County, OK, Johnston County, OK, Lincoln County, OK, Love County, OK, Marshall County, OK, McClain County, OK, Murray County, OK, Oklahoma County, OK, Pontotoc County, OK, Pottawatomie County, OK, Seminole County, OK, Stephens County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Wichita County, TX

The radar

The Norman radar (KTLX), 90 km from the middle of the area, began a volume at 16:31 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, 4.5 hours before the alert went out and 189 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: 215 J/kg
Mixed-layer CIN: -417 J/kg
Mixed-layer LCL: 624 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 278 m²/s²
0-3 km storm-relative helicity: 214 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -1.9

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 Mar 26, 5:33 AM CDT, 5 hours 57 minutes earlier.

Area forecast discussion, Mar 26, 5:33 AM CDT, 5 hours 57 minutes before

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Hazardous weather outlook, Mar 26, 9:26 AM CDT, 2 hours 4 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
Mar 25, 7:30 PM CDT	Special Weather Statement	OUN	Garvin	30 min
Mar 26, 5:42 AM CDT	Dense Fog Advisory	OUN	Alfalfa, Garfield, Grant, Harper, Kay, Major and 4 more	116 min
Mar 26, 1:08 PM CDT	Special Weather Statement	OUN	Cotton	37 min
Mar 26, 1:58 PM CDT	Special Weather Statement	OUN	Cotton	32 min
Mar 26, 2:20 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Tillman	40 min
Mar 26, 2:48 PM CDT	Severe Thunderstorm Warning	OUN	Cotton	25 min
Mar 26, 3:01 PM CDT	Special Weather Statement	OUN	Cotton	29 min
Mar 26, 4:37 PM CDT	Special Weather Statement	OUN	Stephens	23 min
Mar 26, 11:55 AM CDT	Special Weather Statement	OUN	Clay	20 min
Mar 26, 12:14 PM CDT	Special Weather Statement	OUN	Clay	16 min
Mar 26, 12:45 PM CDT	Special Weather Statement	OUN	Clay	15 min
Mar 26, 12:53 PM CDT	Special Weather Statement	OUN	Clay	22 min
Mar 26, 12:57 PM CDT	Special Weather Statement	OUN	Baylor	18 min
Mar 26, 1:10 PM CDT	Severe Thunderstorm Warning	OUN	Baylor, Knox	50 min
Mar 26, 1:16 PM CDT	Special Weather Statement	OUN	Wilbarger	29 min
Mar 26, 1:26 PM CDT	Severe Thunderstorm Warning	OUN	Baylor, Knox	49 min
Mar 26, 1:47 PM CDT	Special Weather Statement	OUN	Wilbarger	28 min
Mar 26, 1:49 PM CDT	Special Weather Statement	OUN	Knox	26 min
Mar 26, 2:03 PM CDT	Special Weather Statement	OUN	Baylor	27 min
Mar 26, 2:09 PM CDT	Special Weather Statement	OUN	Wichita	21 min
Mar 26, 2:25 PM CDT	Special Weather Statement	OUN	Wichita	35 min
Mar 26, 2:27 PM CDT	Special Weather Statement	OUN	Baylor	33 min
Mar 26, 2:41 PM CDT	Severe Thunderstorm Warning	OUN	Archer, Baylor	49 min
Mar 26, 3:24 PM CDT	Severe Thunderstorm Warning	OUN	Archer, Wichita	24 min
Mar 26, 3:56 PM CDT	Special Weather Statement	OUN	Archer	34 min
Mar 26, 4:22 PM CDT	Special Weather Statement	OUN	Baylor	23 min
Mar 26, 4:28 PM CDT	Areal Flood Advisory	OUN	Wichita	2 hr
Mar 26, 4:43 PM CDT	Special Weather Statement	OUN	Baylor	32 min
Mar 26, 5:16 PM CDT	Special Weather Statement	OUN	Archer	29 min
Mar 26, 5:45 PM CDT	Special Weather Statement	OUN	Archer	30 min
Mar 26, 6:33 PM CDT	Special Weather Statement	OUN	Clay	27 min
Mar 26, 6:38 PM CDT	Special Weather Statement	OUN	Archer	37 min
Mar 26, 6:54 PM CDT	Severe Thunderstorm Warning	OUN	Archer	36 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.