Alert archive / Oklahoma / Tornado Warnings in 2020

Tornado Warning 20, NWS Tulsa, OK

April 28, 2020Nowata County, Oklahoma

NWS Tulsa, OK issued this tornado warning at Apr 28, 2020, 5:07 PM CDT for Nowata County, Oklahoma. It was in force for 38 min. 1 report 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: Apr 28, 2020, 5:07 PM CDT (22:07 UTC)
Expired: Apr 28, 2020, 5:45 PM CDT
In force: 38 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), 83 km from the middle of the area, began a volume at 22:11 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
Apr 28, 5:20 PM CDT	TSTM WND DMG	Lenapah, OK	* 1 INJ * WOMEN WAS INJURED BY FLYING GLASS AFTER LARGE TREE FELL ON CAR.

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

The watch it was issued in

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

Issued	Product	Office	Lasted
Apr 28, 3:18 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 10.1 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: 55 J/kg
Mixed-layer CIN: -231 J/kg
Mixed-layer LCL: 1021 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 369 m²/s²
0-3 km storm-relative helicity: 342 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

As transmitted.

723 
WFUS54 KTSA 282207
TORTSA
OKC105-282245-
/O.NEW.KTSA.TO.W.0020.200428T2207Z-200428T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Tulsa OK
507 PM CDT Tue Apr 28 2020

The National Weather Service in Tulsa has issued a

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

* Until 545 PM CDT.
    
* At 507 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 5 miles east of Wann, moving southeast at 45 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 3692 9543 3670 9543 3689 9581 3694 9581
      3694 9579 3696 9579 3700 9576 3700 9561
TIME...MOT...LOC 2207Z 304DEG 37KT 3694 9571 

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

$$

3 follow-up statements

122 
WWUS54 KTSA 282213
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
513 PM CDT Tue Apr 28 2020

OKC105-282245-
/O.CON.KTSA.TO.W.0020.000000T0000Z-200428T2245Z/
Nowata OK-
513 PM CDT Tue Apr 28 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 545 PM CDT FOR NORTHERN
NOWATA COUNTY...
    
At 513 PM CDT, a severe thunderstorm capable of producing a tornado
was located 5 miles northwest of Lenapah, moving southeast 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...

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 3692 9543 3670 9543 3688 9578 3695 9574
      3700 9567 3700 9561
TIME...MOT...LOC 2213Z 305DEG 33KT 3692 9568 

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

$$

234 
WWUS54 KTSA 282224
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
524 PM CDT Tue Apr 28 2020

OKC105-282245-
/O.CON.KTSA.TO.W.0020.000000T0000Z-200428T2245Z/
Nowata OK-
524 PM CDT Tue Apr 28 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 545 PM CDT FOR
NORTHEASTERN NOWATA COUNTY...
    
At 524 PM CDT, a severe thunderstorm capable of producing a tornado
was located 3 miles east of Lenapah, moving southeast 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...
Lenapah...                        

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 3692 9543 3670 9543 3684 9567 3690 9565
      3692 9559
TIME...MOT...LOC 2224Z 305DEG 36KT 3685 9557 

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

$$

206 
WWUS54 KTSA 282236
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
536 PM CDT Tue Apr 28 2020

OKC105-282246-
/O.EXP.KTSA.TO.W.0020.000000T0000Z-200428T2245Z/
Nowata OK-
536 PM CDT Tue Apr 28 2020

...THE TORNADO WARNING FOR NORTHEASTERN NOWATA COUNTY WILL EXPIRE AT
545 PM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore the warning will be allowed to expire.  However small hail
and gusty winds are still possible with this thunderstorm.

A Tornado Watch remains in effect until 1100 PM CDT for northeastern
Oklahoma.

LAT...LON 3692 9543 3670 9543 3684 9567 3690 9565
      3692 9559
TIME...MOT...LOC 2236Z 304DEG 37KT 3679 9546 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 28, 2:10 PM CDT	River Flood Warning	TSA	LeFlore	18 hr
Apr 28, 2:27 PM CDT	River Flood Advisory	TSA	Cherokee	18 hr
Apr 28, 3:56 PM CDT	Special Weather Statement	TSA	Osage	19 min
Apr 28, 4:07 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	53 min
Apr 28, 4:31 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Washington	59 min
Apr 28, 4:39 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	51 min
Apr 28, 4:54 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Osage, Rogers, Washington	66 min
Apr 28, 4:57 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Washington	63 min
Apr 28, 5:04 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	41 min
Apr 28, 5:19 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Nowata, Ottawa, Rogers, Washington	56 min
Apr 28, 5:23 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	52 min
Apr 28, 5:36 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Osage, Pawnee, Rogers, Tulsa, Washington	39 min
Apr 28, 5:44 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Ottawa, Rogers	61 min
Apr 28, 5:45 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee	30 min
Apr 28, 5:51 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Osage, Pawnee	39 min
Apr 28, 5:53 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Mayes, Rogers, Tulsa, Washington	52 min
Apr 28, 6:01 PM CDT	Tornado Warning	TSA	Osage, Tulsa	29 min
Apr 28, 6:02 PM CDT	Tornado Warning	TSA	Mayes, Rogers	28 min
Apr 28, 6:10 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Osage, Pawnee, Rogers, Tulsa, Washington	50 min
Apr 28, 6:15 PM CDT	Special Weather Statement	TSA	Okmulgee	30 min
Apr 28, 6:16 PM CDT	Tornado Warning	TSA	Creek, Tulsa	29 min
Apr 28, 6:18 PM CDT	Tornado Warning	TSA	Delaware, Mayes, Rogers	42 min
Apr 28, 6:23 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Mayes, Okmulgee, Rogers, Tulsa, Wagoner	52 min
Apr 28, 6:31 PM CDT	Tornado Warning	TSA	Mayes	29 min
Apr 28, 6:33 PM CDT	Areal Flood Advisory	TSA	Creek, Mayes, Osage, Rogers, Tulsa, Wagoner	117 min
Apr 28, 6:37 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Craig, Delaware, Mayes, Ottawa, Rogers and 1 more	53 min
Apr 28, 6:42 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Creek, Mayes, Muskogee, Okfuskee, Okmulgee and 3 more	63 min
Apr 28, 6:56 PM CDT	Flash Flood Warning	TSA	Tulsa	3 hr

Nearby

Tornado Warnings in Oklahoma, 2020 Every tornado warning in 2020 Tornadoes in 2020

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.