Alert archive / Oklahoma / Tornado Warnings in 2001

Tornado Warning 9, NWS Tulsa, OK

May 20, 2001Haskell County, Muskogee County, Oklahoma

NWS Tulsa, OK issued this tornado warning at May 20, 2001, 6:11 PM CDT for Haskell County, Muskogee County, Oklahoma. It was in force for 64 min. 7 reports 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: May 20, 2001, 6:11 PM CDT (23:11 UTC)
Expired: May 20, 2001, 7:15 PM CDT
In force: 64 min
Issued by: NWS Tulsa, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Haskell County, OK, Muskogee County, OK

The radar

The Western Arkansas radar (KSRX), 75 km from the middle of the area, began a volume at 23:11 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 20, 6:30 PM CDT	Thunderstorm Wind	Porum, OK	Thunderstorm winds blew the roofs off a few businesses and overturned a few trailers. The wind also overturned a few semi trucks and RVs.
May 20, 6:30 PM CDT	Tornado F0	Enterprise, OK	A F0 tornado briefly touched down near the community of Enterprise. The damage was limited to trees.
May 20, 6:54 PM CDT	Tornado F0	Stigler, OK	Thunderstorm winds produced thousands of dollars of damage in the city of Stigler. The pattern of the damage and spotter reports also indicated that a tornado briefly touched down just southwest of the city of Stigler.
May 20, 6:55 PM CDT	Hail 0.75	Whitefield, OK
May 20, 6:55 PM CDT	Thunderstorm Wind 80 M	Stigler, OK
May 20, 6:57 PM CDT	Thunderstorm Wind	Stigler, OK	Thunderstorm winds severely damaged the Cookson Hills Electric Cooperative building and the Alumbaugh Health Clinic. Three doors on the Haskell County district county barn were damaged as were four bay doors at the Speedy Lube business. The building housing
May 20, 7:00 PM CDT	Hail 0.88	Webbers Falls, 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
May 20, 3:30 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 11.2 hours before the alert went out and 201 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 796 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: -20 m²/s²
0-3 km storm-relative helicity: 7 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 
WFUS54 KTSA 202313
TORTUL
OKC061-101-210015-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TULSA OK
611 PM CDT SUN MAY 20 2001

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* TORNADO WARNING FOR
  SOUTHERN MUSKOGEE COUNTY IN EAST CENTRAL OKLAHOMA
  HASKELL COUNTY IN SOUTHEAST OKLAHOMA

* UNTIL 715 PM CDT

* AT 611 PM CDT...DOPPLER RADAR INDICATED A DEVELOPING TORNADO 7
  MILES NORTHWEST OF ENTERPRISE. THIS DANGEROUS STORM IS MOVING
  EAST AT 25 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...WEBBERS
  FALLS...WARNER...PORUM...BRIARTOWN...WHITEFIELD...ENTERPRISE...
  MCCURTAIN...KINTA...LEQUIRE AND STIGLER.

IF YOU ARE IN OR NEAR THE PATH OF THIS STORM...TAKE COVER NOW IF NO
UNDERGROUND SHELTER IS AVAILABLE MOVE TO AN INTERIOR ROOM ON THE
LOWEST FLOOR. MOBILE HOMES AND VEHICLES SHOULD BE ABANDONED FOR MORE
SUBSTANTIAL SHELTER. AVOID WINDOWS

IN ADDITION TO THE THREAT OF A TORNADO...LARGE HAIL AND DAMAGING 
STRAIGHT LINE WINDS CAN BE EXPECTED WITH THIS STORM. GO TO A SAFE 
PLACE NOW

LAT...LON 3554 9510 3512 9493 3508 9506 3507 9535
          3522 9546 3549 9532

The office that day

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

Issued	Product	Office	Counties	Lasted
May 20, 4:17 PM CDT	Severe Thunderstorm Warning	TSA	Osage	58 min
May 20, 4:24 PM CDT	Severe Thunderstorm Warning	TSA	Okfuskee, Okmulgee	51 min
May 20, 4:30 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh	60 min
May 20, 4:31 PM CDT	Tornado Warning	TSA	McIntosh	29 min
May 20, 4:56 PM CDT	Tornado Warning	TSA	McIntosh	49 min
May 20, 5:14 PM CDT	Severe Thunderstorm Warning	TSA	Osage	61 min
May 20, 5:23 PM CDT	Severe Thunderstorm Warning	TSA	Creek	52 min
May 20, 5:32 PM CDT	Tornado Warning	TSA	Osage	43 min
May 20, 5:45 PM CDT	Tornado Warning	TSA	McIntosh	60 min
May 20, 5:46 PM CDT	Severe Thunderstorm Warning	TSA	Tulsa	44 min
May 20, 5:51 PM CDT	Severe Thunderstorm Warning	TSA	Rogers, Wagoner	39 min
May 20, 6:02 PM CDT	Tornado Warning	TSA	Pittsburg	58 min
May 20, 6:12 PM CDT	Severe Thunderstorm Warning	TSA	Osage	48 min
May 20, 6:13 PM CDT	Severe Thunderstorm Warning	TSA	Pawnee	62 min
May 20, 6:16 PM CDT	Tornado Warning	TSA	Osage	44 min
May 20, 6:33 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Mayes, Rogers	57 min
May 20, 6:41 PM CDT	Tornado Warning	TSA	Washington	49 min
May 20, 6:43 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Tulsa	62 min
May 20, 6:56 PM CDT	Tornado Warning	TSA	Mayes	49 min
May 20, 6:59 PM CDT	Severe Thunderstorm Warning	TSA	Osage	46 min

Nearby

Tornado Warnings in Oklahoma, 2001 Every tornado warning in 2001 Tornadoes 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.