Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 4, NWS Tulsa, OK

February 9, 2001Mayes County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Feb 9, 2001, 3:01 AM CST for Mayes County, Oklahoma. It was in force for 29 min. 1 report came from 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, with what was reported inside it.

The facts

Issued: Feb 9, 2001, 3:01 AM CST (09:01 UTC)
Expired: Feb 9, 2001, 3:30 AM CST
In force: 29 min
Issued by: NWS Tulsa, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Mayes County, OK

The radar

The Tulsa radar (KINX), 25 km from the middle of the area, began a volume at 09:02 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
Feb 9, 3:20 AM CST	Hail 1	Locust Grove, OK

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 watch it was issued in

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

Issued	Product	Office	Lasted
Feb 9, 2:45 AM CST	Tornado Watch	SPC	4 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 9.0 hours before the alert went out and 152 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: 69 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 556 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 362 m²/s²
0-3 km storm-relative helicity: 399 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KTSA 090901
SVRTUL
OKC097-090930-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
301 AM CST FRI FEB 9 2001

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MAYES COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 330 AM CST

* AT 301 AM CST...DOPPLER RADAR INDICATED SEVERE THUNDERSTORMS ALONG
  A LINE EXTENDING FROM 6 MILES NORTHWEST OF CHOUTEAU TO 4 MILES
  SOUTH OF CHOUTEAU...MOVING NORTHEAST AT 50 MPH.

* SOME LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...PENSACOLA...
  ADAIR...SALINA...ROSE...LOCUST GROVE...CHOUTEAU AND PRYOR.

LAT...LON 3631 9553 3604 9534 3620 9501 3652 9515

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 9, 1:59 AM CST	Severe Thunderstorm Warning	TSA	Okfuskee, Okmulgee	46 min
Feb 9, 2:31 AM CST	Severe Thunderstorm Warning	TSA	Okmulgee, Tulsa, Wagoner	44 min
Feb 9, 2:31 AM CST	Severe Thunderstorm Warning	TSA	Muskogee	44 min
Feb 9, 3:07 AM CST	Severe Thunderstorm Warning	TSA	Choctaw, Pushmataha	53 min
Feb 9, 3:07 AM CST	Severe Thunderstorm Warning	TSA	Latimer, Pittsburg	53 min
Feb 9, 3:15 AM CST	Severe Thunderstorm Warning	TSA	Delaware	30 min
Feb 9, 3:25 AM CST	Severe Thunderstorm Warning	TSA	Adair, Cherokee	50 min
Feb 9, 3:41 AM CST	Severe Thunderstorm Warning	TSA	Delaware	49 min
Feb 9, 3:56 AM CST	Severe Thunderstorm Warning	TSA	Haskell, Latimer, LeFlore, Pushmataha	64 min
Feb 9, 3:56 AM CST	Severe Thunderstorm Warning	TSA	Choctaw	64 min
Feb 9, 4:11 AM CST	Severe Thunderstorm Warning	TSA	Sequoyah	49 min
Feb 9, 4:15 AM CST	Severe Thunderstorm Warning	TSA	Adair	60 min
Feb 9, 4:32 AM CST	Severe Thunderstorm Warning	TSA	LeFlore, Sequoyah	58 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.