Alert archive / Oklahoma / Tornado Warnings in 2020

Tornado Warning 24, NWS Tulsa, OK

April 28, 2020Delaware County, Mayes County, Rogers County, Oklahoma

NWS Tulsa, OK issued this tornado warning at Apr 28, 2020, 6:18 PM CDT for Delaware County, Mayes County, Rogers County, Oklahoma. It was in force for 42 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: Apr 28, 2020, 6:18 PM CDT (23:18 UTC)
Expired: Apr 28, 2020, 7:00 PM CDT
In force: 42 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Delaware County, OK, Mayes County, OK, Rogers County, OK

The radar

The Tulsa radar (KINX), 41 km from the middle of the area, began a volume at 23:21 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, 6:23 PM CDT	TSTM WND DMG	7 Wsw Adair, OK	LARGE TREE DOWN NEAR NS427 AND EW420 ROADS. TIME IS CORRECTED FROM PREVIOUS ISSUANCE TO LINE UP WITH RADAR.
Apr 28, 7:06 PM CDT	TSTM WND DMG	7 Wsw Adair, OK	LARGE TREE DOWN NEAR NS427 AND EW420 ROADS

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, 11.3 hours before the alert went out and 140 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.

059 
WFUS54 KTSA 282318
TORTSA
OKC041-097-131-290000-
/O.NEW.KTSA.TO.W.0024.200428T2318Z-200429T0000Z/

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

The National Weather Service in Tulsa has issued a

* Tornado Warning for...
  Northeastern Rogers County in northeastern Oklahoma...
  West central Delaware County in northeastern Oklahoma...
  Northern Mayes County in northeastern Oklahoma...

* Until 700 PM CDT.
    
* At 618 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 4 miles east of Foyil, moving east 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...
  Pryor Creek...                    Chelsea...
  Salina...                         Adair...
  Spavinaw...                       Foyil...
  Pensacola...                      Hoot Owl...
  Spavinaw State Park...            Chloeta...
  Strang...                         Snowdale State Park...
  Bushyhead...                      

This includes Interstate 44 between mile markers 259 and 272.
 
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 3652 9533 3651 9533 3651 9527 3642 9488
      3622 9496 3639 9557 3656 9549
TIME...MOT...LOC 2318Z 288DEG 38KT 3645 9545 

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

$$

1 follow-up statement

327 
WWUS54 KTSA 282333
SVSTSA

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

OKC131-282342-
/O.CAN.KTSA.TO.W.0024.000000T0000Z-200429T0000Z/
Rogers OK-
633 PM CDT Tue Apr 28 2020

...THE TORNADO WARNING FOR NORTHEASTERN ROGERS COUNTY IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area therefore the warning has been cancelled.

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

LAT...LON 3642 9488 3622 9496 3635 9543 3640 9543
      3647 9536 3651 9527
TIME...MOT...LOC 2332Z 288DEG 33KT 3641 9530 

$$

OKC041-097-290000-
/O.CON.KTSA.TO.W.0024.000000T0000Z-200429T0000Z/
Delaware OK-Mayes OK-
633 PM CDT Tue Apr 28 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 700 PM CDT FOR WEST
CENTRAL DELAWARE AND NORTHERN MAYES COUNTIES...
    
At 632 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Adair, moving east 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...
Pryor Creek...                    Salina...
Adair...                          Spavinaw...
Pensacola...                      Hoot Owl...
Spavinaw State Park...            Chloeta...
Strang...                         Snowdale State Park...

This includes Interstate 44 between mile markers 261 and 272.
 
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 3642 9488 3622 9496 3635 9543 3640 9543
      3647 9536 3651 9527
TIME...MOT...LOC 2332Z 288DEG 33KT 3641 9530 

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

$$

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, 5:07 PM CDT	Tornado Warning	TSA	Nowata	38 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, 6:23 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.