Alert archive / Oklahoma / Tornado Warnings in 1998

Tornado Warning 79, NWS Tulsa, OK

October 17, 1998Nowata County, Rogers County, Oklahoma

NWS Tulsa, OK issued this tornado warning at Oct 17, 1998, 3:07 PM CDT for Nowata County, Rogers County, Oklahoma. It was in force for 53 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: Oct 17, 1998, 3:07 PM CDT (20:07 UTC)
Expired: Oct 17, 1998, 4:00 PM CDT
In force: 53 min
Issued by: NWS Tulsa, OK
Area: Whole counties

Counties Nowata County, OK, Rogers County, OK

The radar

The Tulsa radar (KINX), 46 km from the middle of the area, began a volume at 20:09 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 nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 8.1 hours before the alert went out and 165 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: 469 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 600 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 307 m²/s²
0-3 km storm-relative helicity: 342 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 2.5

Open this sounding in Storm Lab

The text

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

363 
WFUS54 KTSA 172009 RRA
TORTUL
OKC105-131-172100-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TULSA OK
307 PM CDT SAT OCT 17 1998

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* TORNADO WARNING FOR
     NORTHWEST ROGERS COUNTY IN NORTHEAST OKLAHOMA
     NOWATA COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 400 PM CDT

* AT 307 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM WITH STRONG
  ROTATION 18 MILES WEST OF TALALA. MOVING NORTHEAST AT 40 MILES PER
  HOUR...THIS DANGEROUS STORM COULD PRODUCE A TORNADO AT ANY TIME.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...  TALALA...
  WATOVA...LENAPAH...DELAWARE AND NOWATA

STORM SPOTTERS REPORTED A FUNNEL CLOUD JUST NORTHWEST OF SKIATOOK. 


THIS IS A DANGEROUS STORM. IF YOU ARE IN OR NEAR ITS PATH YOU SHOULD
PREPARE FOR LARGE HAIL...DAMAGING WINDS AND POSSIBLY A TORNADO. IF NO
UNDERGROUND SHELTER IS AVAILABLE TAKE COVER ON THE LOWEST FLOOR IN AN
INTERIOR ROOM AWAY FROM WINDOWS.

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 16, 7:59 PM CDT	Severe Thunderstorm Warning	TSA	Adair	31 min
Oct 16, 8:31 PM CDT	Severe Thunderstorm Warning	TSA	Adair	29 min
Oct 17, 12:52 PM CDT	Severe Thunderstorm Warning	TSA	Osage	38 min
Oct 17, 1:28 PM CDT	Severe Thunderstorm Warning	TSA	Osage	32 min
Oct 17, 1:55 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Washington	50 min
Oct 17, 2:11 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Washington	49 min
Oct 17, 2:11 PM CDT	Severe Thunderstorm Warning	TSA	Osage	49 min
Oct 17, 2:57 PM CDT	Tornado Warning	TSA	Osage, Tulsa, Washington	33 min
Oct 17, 3:47 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Rogers, Washington	43 min
Oct 17, 3:47 PM CDT	Severe Thunderstorm Warning	TSA	Osage	43 min

Nearby

Tornado Warnings in Oklahoma, 1998 Every tornado warning in 1998 Tornadoes in 1998

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.