Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 101, NWS Tulsa, OK

May 6, 2001Pawnee County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 6, 2001, 4:18 PM CDT for Pawnee County, Oklahoma. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: May 6, 2001, 4:18 PM CDT (21:18 UTC)
Expired: May 6, 2001, 4:45 PM CDT
In force: 27 min
Issued by: NWS Tulsa, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Pawnee County, OK

The radar

The Tulsa radar (KINX), 71 km from the middle of the area, began a volume at 21:19 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 6, 2:30 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Lamont, OK (KLMN), launched 12:00Z, 9.3 hours before the alert went out and 111 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: 974 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 677 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 86 m²/s²
0-3 km storm-relative helicity: 142 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS54 KTSA 062119
SVRTUL
OKC117-062145-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
418 PM CDT SUN MAY 6 2001

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN PAWNEE COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 445 PM CDT

* AT 418 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER 
WESTPORT...MOVING EAST AT 10 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...WESTPORT.

HAIL TO THE SIZE OF NICKELS AND WIND GUSTS TO 60 MPH CAN BE EXPECTED 
IN THE WARNED AREA.

A TORNADO WATCH IS ALSO IN EFFECT. TORNADOES CAN DEVELOP SUDDENLY
FROM SEVERE THUNDERSTORMS. BE ALERT FO&R RAPIDLY CHANGING WEATHER
CONDITIONS.

LAT...LON 3625 9640 3618 9635 3618 9625 3623 9630

The office that day

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

Issued	Product	Office	Counties	Lasted
May 6, 2:31 PM CDT	Severe Thunderstorm Warning	TSA	Osage	44 min
May 6, 4:01 PM CDT	Severe Thunderstorm Warning	TSA	Osage	44 min
May 6, 4:47 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Tulsa, Washington	58 min
May 6, 5:19 PM CDT	Severe Thunderstorm Warning	TSA	Rogers	56 min
May 6, 5:29 PM CDT	Tornado Warning	TSA	Tulsa	31 min
May 6, 5:57 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Ottawa	63 min
May 6, 6:00 PM CDT	Severe Thunderstorm Warning	TSA	Rogers, Tulsa	60 min
May 6, 6:26 PM CDT	Severe Thunderstorm Warning	TSA	Mayes	49 min
May 6, 6:58 PM CDT	Severe Thunderstorm Warning	TSA	Ottawa	62 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2001 Every severe thunderstorm warning in 2001

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.