Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 306, NWS Tulsa, OK

May 22, 1999Okmulgee County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 22, 1999, 7:13 PM CDT for Okmulgee County, Oklahoma. It was in force for 47 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: May 22, 1999, 7:13 PM CDT (00:13 UTC)
Expired: May 22, 1999, 8:00 PM CDT
In force: 47 min
Issued by: NWS Tulsa, OK
Area: Whole counties

County Okmulgee County, OK

The radar

The Tulsa radar (KINX), 69 km from the middle of the area, began a volume at 00:13 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.

What was reported inside it

Time	Report	Where	Remark
May 22, 7:15 PM CDT	Hail 0.88	Beggs, OK
May 22, 8:05 PM CDT	Thunderstorm Wind 61	Okmulgee, OK	A wind gust estimated at 70 miles an hour damaged a race car south of Okmulgee.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 0.2 hours before the alert went out and 138 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: 1374 J/kg
Mixed-layer CIN: -60 J/kg
Mixed-layer LCL: 1632 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 135 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.7

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Tulsa, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at May 22, 2:35 PM CDT, 4 hours 38 minutes earlier.

Area forecast discussion, May 22, 2:35 PM CDT, 4 hours 38 minutes before

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
235 PM CDT SAT MAY 22 1999

NO DISCUSSION WILL BE WRITTEN THIS AFTERNOON DUE TO SEVERE WEATHER.

FCSTID = 11

.TUL...
AR...NONE.
OK...NONE.

In the hours before

Local storm report, May 22, 5:01 PM CDT, 2 hours 12 minutes before

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Local storm report, May 22, 5:01 PM CDT, 2 hours 12 minutes before

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Local storm report, May 22, 6:05 PM CDT, 1 hour 8 minutes before

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Local storm report, May 22, 6:05 PM CDT, 1 hour 8 minutes before

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Local storm report, May 22, 6:50 PM CDT, 23 minutes before

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Local storm report, May 22, 6:50 PM CDT, 23 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 22, 7:21 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee	39 min
May 22, 7:36 PM CDT	Severe Thunderstorm Warning	TSA	Muskogee	39 min
May 22, 7:40 PM CDT	Severe Thunderstorm Warning	TSA	Sequoyah	50 min
May 22, 7:49 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	41 min
May 22, 7:56 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee, Okmulgee	49 min
May 22, 8:46 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	44 min
May 22, 9:23 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	52 min
May 23, 1:45 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	45 min
May 23, 1:45 AM CDT	Severe Thunderstorm Warning	TSA	Nowata, Rogers, Washington	45 min
May 23, 1:45 AM CDT	Severe Thunderstorm Warning	TSA	Craig	45 min
May 23, 1:58 AM CDT	Severe Thunderstorm Warning	TSA	Ottawa	47 min
May 23, 2:30 AM CDT	Severe Thunderstorm Warning	TSA	Delaware, Mayes, Ottawa	60 min
May 23, 2:30 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Osage, Pawnee, Tulsa	60 min
May 23, 2:30 AM CDT	Severe Thunderstorm Warning	TSA	Rogers, Wagoner	60 min
May 23, 3:35 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee, Okmulgee	55 min
May 23, 3:35 AM CDT	Severe Thunderstorm Warning	TSA	Muskogee, Tulsa, Wagoner	55 min
May 23, 3:58 AM CDT	Flash Flood Warning	TSA	Muskogee, Okmulgee, Wagoner	2 hr
May 23, 3:58 AM CDT	Flash Flood Warning	TSA	Cherokee	2 hr
May 23, 4:17 AM CDT	Severe Thunderstorm Warning	TSA	McIntosh	43 min
May 22, 7:29 PM CDT	Severe Thunderstorm Warning	TSA	Sebastian	46 min
May 23, 3:05 AM CDT	Severe Thunderstorm Warning	TSA	Benton, Carroll, Madison	40 min
May 23, 3:05 AM CDT	Severe Thunderstorm Warning	TSA	Washington	40 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1999 Every severe thunderstorm warning in 1999

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.