Alert archive / Oklahoma / Tornado Warnings in 2021

Tornado Warning 1, NWS Tulsa, OK

January 30, 2021Nowata County, Oklahoma

NWS Tulsa, OK issued this tornado warning at Jan 30, 2021, 1:45 PM CST for Nowata County, Oklahoma. It was in force for 45 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jan 30, 2021, 1:45 PM CST (19:45 UTC)
Expired: Jan 30, 2021, 2:30 PM CST
In force: 45 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Nowata County, OK

The radar

The Tulsa radar (KINX), 81 km from the middle of the area, began a volume at 19:49 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
Jan 30, 1:45 PM CST	TORNADO	3 Se Wann, OK
Jan 30, 1:59 PM CST	TORNADO	7 N Lenapah, OK

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 7.8 hours before the alert went out and 162 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: 827 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 481 m²/s²
0-3 km storm-relative helicity: 593 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

116 
WFUS54 KTSA 301945
TORTSA
OKC105-302030-
/O.NEW.KTSA.TO.W.0001.210130T1945Z-210130T2030Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Tulsa OK
145 PM CST Sat Jan 30 2021

The National Weather Service in Tulsa has issued a

* Tornado Warning for...
  Northern Nowata County in northeastern Oklahoma...

* Until 230 PM CST.
    
* At 145 PM CST, a severe thunderstorm capable of producing a tornado
  was located 3 miles southeast of Wann, moving northeast at 40 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* Locations in or near the path include...
  South Coffeyville...              Lenapah...
  Wann...                           

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3691 9543 3679 9580 3681 9581 3691 9581
      3700 9562 3700 9547
TIME...MOT...LOC 1945Z 239DEG 34KT 3687 9577 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

1 follow-up statement

057 
WWUS54 KTSA 301955
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
155 PM CST Sat Jan 30 2021

OKC105-302030-
/O.CON.KTSA.TO.W.0001.000000T0000Z-210130T2030Z/
Nowata OK-
155 PM CST Sat Jan 30 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 230 PM CST FOR NORTHERN
NOWATA COUNTY...
    
At 155 PM CST, a confirmed tornado was located 5 miles southwest of
South Coffeyville, moving northeast at 40 mph.

HAZARD...Damaging tornado.

SOURCE...Weather spotters confirmed tornado 3 miles southeast of 
         Wann at around 1:45 pm.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations in or near the path include...
South Coffeyville...              Lenapah...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

&&

LAT...LON 3682 9570 3692 9578 3700 9562 3700 9547
      3692 9543 3688 9551
TIME...MOT...LOC 1955Z 237DEG 34KT 3693 9567 

TORNADO...OBSERVED
HAIL...<.75IN

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 30, 3:16 AM CST	Wind Advisory	TSA	Choctaw, Haskell, Latimer, McIntosh, Muskogee, Okfuskee and 3 more	14 hr
Jan 30, 2:29 PM CST	Tornado Warning	TSA	Craig, Nowata	31 min
Jan 30, 2:51 PM CST	Tornado Warning	TSA	Craig, Nowata, Ottawa	39 min
Jan 30, 3:22 PM CST	Tornado Warning	TSA	Craig, Ottawa	38 min
Jan 30, 3:24 PM CST	Tornado Warning	TSA	Craig, Delaware, Ottawa	51 min

Nearby

Tornado Warnings in Oklahoma, 2021 Every tornado warning in 2021 Tornadoes in 2021

Sources

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