Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 233, NWS Norman, OK

May 3, 20174 counties in Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 3, 2017, 1:56 AM CDT for 4 counties in Oklahoma. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 3, 2017, 1:56 AM CDT (06:56 UTC)
Expired: May 3, 2017, 2:45 AM CDT
In force: 49 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Garfield County, OK, Grant County, OK, Kay County, OK, Noble County, OK

The radar

The Vance AFB radar (KVNX), 59 km from the middle of the area, began a volume at 07:00 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 2, 10:53 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 6.9 hours before the alert went out and 153 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: 684 J/kg
Mixed-layer CIN: -85 J/kg
Mixed-layer LCL: 1621 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 263 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 4.3

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at May 3, 1:39 AM CDT, 17 minutes earlier.

Area forecast discussion, May 3, 1:39 AM CDT, 17 minutes before

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Hazardous weather outlook, May 2, 11:59 PM CDT, 1 hour 57 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Norman OK
1159 PM CDT Tue May 2 2017

OKZ004>048-050>052-TXZ083>090-040500-
Harper-Woods-Alfalfa-Grant-Kay-Ellis-Woodward-Major-Garfield-
Noble-Roger Mills-Dewey-Custer-Blaine-Kingfisher-Logan-Payne-
Beckham-Washita-Caddo-Canadian-Oklahoma-Lincoln-Grady-McClain-
Cleveland-Pottawatomie-Seminole-Hughes-Harmon-Greer-Kiowa-Jackson-
Tillman-Comanche-Stephens-Garvin-Murray-Pontotoc-Coal-Cotton-
Jefferson-Carter-Johnston-Atoka-Love-Marshall-Bryan-Hardeman-
Foard-Wilbarger-Wichita-Knox-Baylor-Archer-Clay-
1159 PM CDT Tue May 2 2017

This hazardous weather outlook is for portions of northern...
western...central...and southern Oklahoma...and western north
Texas.

.DAY ONE...Rest of Tonight...

.Thunderstorms...
There is a slight risk of severe thunderstorms across portions of
northern Oklahoma through early Wednesday.

Location...
The slight risk area extends north of a line from Cheyenne to
Kingfisher to Perry Oklahoma.

Timing...
The most likely time for severe thunderstorms will be through 4
AM.

Impacts...
Large hail up to the size of golf balls and damaging wind gusts
around 60 mph will be possible.

Discussion...
Scattered showers and thunderstorms will continue to develop and
move across mainly the northern half of Oklahoma into Wednesday
morning. Some strong to severe storms will remain possible into
early Wednesday morning with large hail and damaging wind the
main concerns.

.Heavy Rainfall...
Thunderstorms that occur overnight will have the potential to
produce heavy rainfall, resulting in isolated flooding along and
north of I40.

.SPOTTER AND EMERGENCY MANAGEMENT STATEMENT...
Storm spotter groups and emergency management personnel across
the risk area should prepare for severe weather operations through
the overnight hours.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday...

.Thunderstorms...
Thunderstorm chances will continue Wednesday, a few strong to
marginally severe storms will be possible Wednesday morning
across southeast Oklahoma.

Get graphics and more details at weather.gov/norman...and follow
our weather forecast office on Twitter and Facebook.

In the hours before

Local storm report, May 3, 12:43 AM CDT, 1 hour 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1243 AM CDT WED MAY 03 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1242 AM     HAIL             3 S BRAMAN              36.88N 97.33W
05/03/2017  E1.50 INCH       KAY                OK   BROADCAST MEDIA

&&

SC

Local storm report, May 3, 12:45 AM CDT, 1 hour 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1245 AM CDT WED MAY 03 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1200 AM     HAIL             TANGIER                 36.42N 99.53W
05/03/2017  E1.25 INCH       WOODWARD           OK   STORM CHASER

&&

SC

Local storm report, May 3, 1:05 AM CDT, 51 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
105 AM CDT WED MAY 03 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1210 AM     TSTM WND DMG     6 S WOODWARD            36.35N 99.39W
05/03/2017                   WOODWARD           OK   EMERGENCY MNGR

            DOZEN POWER POLES DOWN ALONG HWY 34 FROM 4 MILES SOUTH OF
            WOODWARD SOUTH TO SHARON.

&&

SC

Local storm report, May 3, 1:10 AM CDT, 46 minutes before

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Special weather statement, May 3, 1:10 AM CDT, 46 minutes before

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Local storm report, May 3, 1:22 AM CDT, 34 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 2, 9:45 PM CDT	Special Weather Statement	OUN	Alfalfa	30 min
May 2, 10:09 PM CDT	Special Weather Statement	OUN	Alfalfa	36 min
May 2, 10:17 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Garfield, Grant, Major	43 min
May 2, 10:21 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Grant	39 min
May 2, 10:24 PM CDT	Special Weather Statement	OUN	Ellis, Harper	36 min
May 2, 10:51 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Grant, Kay, Noble	39 min
May 2, 10:53 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Grant	52 min
May 2, 11:00 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper, Woodward	45 min
May 2, 11:17 PM CDT	Special Weather Statement	OUN	Kay	28 min
May 2, 11:30 PM CDT	Special Weather Statement	OUN	Kay	30 min
May 2, 11:39 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper, Woodward	52 min
May 2, 11:45 PM CDT	Special Weather Statement	OUN	Grant	30 min
May 2, 11:54 PM CDT	Special Weather Statement	OUN	Noble	21 min
May 3, 12:15 AM CDT	Severe Thunderstorm Warning	OUN	Grant, Kay	45 min
May 3, 12:22 AM CDT	Severe Thunderstorm Warning	OUN	Major, Woods, Woodward	53 min
May 3, 1:04 AM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Garfield, Grant, Major, Woods	56 min
May 3, 1:07 AM CDT	Severe Thunderstorm Warning	OUN	Kay	53 min
May 3, 1:10 AM CDT	Special Weather Statement	OUN	Woodward	35 min
May 3, 2:39 AM CDT	Severe Thunderstorm Warning	OUN	Kay, Noble	49 min
May 3, 3:06 AM CDT	Areal Flood Advisory	OUN	Grant, Kay	4 hr
May 3, 3:17 AM CDT	Areal Flood Advisory	OUN	Alfalfa, Garfield	4 hr
May 3, 7:00 AM CDT	Special Weather Statement	OUN	Coal	45 min
May 3, 7:43 AM CDT	Special Weather Statement	OUN	Coal	17 min
May 3, 7:57 AM CDT	Special Weather Statement	OUN	Atoka	48 min
May 3, 9:26 AM CDT	Special Weather Statement	OUN	Marshall	49 min
May 3, 10:35 AM CDT	Special Weather Statement	OUN	Bryan	40 min
May 3, 11:14 AM CDT	Special Weather Statement	OUN	Bryan	31 min
May 3, 6:21 PM CDT	Special Weather Statement	OUN	Foard	24 min
May 3, 6:46 PM CDT	Special Weather Statement	OUN	Knox	29 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2017 Every severe thunderstorm warning 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.