Alert archive / Oklahoma / Tornado Warnings in 2017

Tornado Warning 22, NWS Norman, OK

May 16, 2017Roger Mills County, Oklahoma

NWS Norman, OK issued this tornado warning at May 16, 2017, 5:55 PM CDT for Roger Mills County, Oklahoma. It was in force for 50 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: May 16, 2017, 5:55 PM CDT (22:55 UTC)
Expired: May 16, 2017, 6:45 PM CDT
In force: 50 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Tornado: Observed
Hail: 1.75 in

County Roger Mills County, OK

The radar

The Altus AFB radar (KFDR), 164 km from the middle of the area, began a volume at 22:56 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 16, 6:18 PM CDT	TORNADO	3 S Reydon, OK	ROPE TORNADO REPORTED ON THE GROUND BRIEFLY SOUTH OF REYDON. SPECIFIC LOCATION ESTIMATED.
May 16, 6:45 PM CDT	TORNADO	6 Nw Strong City, OK	SMALL TORNADO OBSERVED FROM NEAR STRONG CITY. LOCATION ESTIMATED.

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
May 16, 1:54 PM CDT	Tornado Watch PDS	SPC	8 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 10.9 hours before the alert went out and 176 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: 837 J/kg
Mixed-layer CIN: -240 J/kg
Mixed-layer LCL: 1292 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 4 m²/s²
0-3 km storm-relative helicity: 88 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

795 
WFUS54 KOUN 162255
TOROUN
OKC129-162345-
/O.NEW.KOUN.TO.W.0022.170516T2255Z-170516T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Norman OK
555 PM CDT TUE MAY 16 2017

The National Weather Service in Norman has issued a

* Tornado Warning for...
  Southwestern Roger Mills County in western Oklahoma...

* Until 645 PM CDT

* At 555 PM CDT, a confirmed tornado was located 5 miles south of
  Allison, moving northeast at 35 mph.

  HAZARD...Damaging tornado and golf ball size hail. 

  SOURCE...NWS Employee confirmed tornado. 

  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 impacted include...
  Cheyenne, Reydon, Roll and Dempsey. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
storm shelter, safe room 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 3566 10000 3584 9972 3575 9965 3559 9963
      3544 10000
TIME...MOT...LOC 2255Z 234DEG 30KT 3553 10007 

TORNADO...OBSERVED
HAIL...1.75IN

$$

KURTZ

3 follow-up statements

236 
WWUS54 KOUN 162314 RRA
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
614 PM CDT TUE MAY 16 2017

OKC129-162345-
/O.CON.KOUN.TO.W.0022.000000T0000Z-170516T2345Z/
Roger Mills OK-
614 PM CDT TUE MAY 16 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR
SOUTHWESTERN ROGER MILLS COUNTY...
    
At 614 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Reydon, moving northeast at 35 mph.

HAZARD...Tornado and tennis ball size hail. 

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 impacted include...
Cheyenne, Reydon and Roll. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a storm shelter, safe room, 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 3566 10000 3584 9972 3575 9965 3559 9963
      3552 9980 3548 10000
TIME...MOT...LOC 2314Z 234DEG 30KT 3563 9991 

TORNADO...RADAR INDICATED
HAIL...2.50IN

$$

KURTZ

795 
WWUS54 KOUN 162322
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
622 PM CDT TUE MAY 16 2017

OKC129-162345-
/O.CON.KOUN.TO.W.0022.000000T0000Z-170516T2345Z/
Roger Mills OK-
622 PM CDT TUE MAY 16 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR
SOUTHWESTERN ROGER MILLS COUNTY...
    
At 622 PM CDT, a confirmed tornado was located near Reydon, moving
northeast at 25 mph.

HAZARD...Damaging tornado and tennis ball size hail. 

SOURCE...Weather spotters confirmed tornado. 

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 impacted include...
Cheyenne, Reydon and Roll. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
storm shelter, safe room, 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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

&&

LAT...LON 3566 10000 3584 9972 3575 9965 3559 9963
      3553 9978 3553 10000
TIME...MOT...LOC 2322Z 235DEG 22KT 3563 9989 

TORNADO...OBSERVED
HAIL...2.50IN

$$

KURTZ

562 
WWUS54 KOUN 162332
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
632 PM CDT TUE MAY 16 2017

OKC129-162345-
/O.CON.KOUN.TO.W.0022.000000T0000Z-170516T2345Z/
Roger Mills OK-
632 PM CDT TUE MAY 16 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR WEST
CENTRAL ROGER MILLS COUNTY...
    
At 631 PM CDT, a confirmed tornado was located 6 miles southwest of
Roll, moving northeast at 45 mph.

HAZARD...Damaging tornado and two inch hail. 

SOURCE...Weather spotters confirmed tornado. 

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 impacted include...
Reydon and Roll. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
storm shelter, safe room, 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.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!

&&

LAT...LON 3584 9972 3575 9965 3566 9964 3556 9997
      3569 9996
TIME...MOT...LOC 2331Z 237DEG 38KT 3570 9977 

TORNADO...OBSERVED
HAIL...2.00IN

$$

KURTZ

The office that day

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

Issued	Product	Office	Counties	Lasted
May 16, 5:16 PM CDT	Special Weather Statement	OUN	Beckham	29 min
May 16, 5:29 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Greer, Harmon	46 min
May 16, 5:45 PM CDT	Special Weather Statement	OUN	Roger Mills	30 min
May 16, 5:48 PM CDT	Tornado Warning	OUN	Beckham, Greer, Harmon	27 min
May 16, 5:54 PM CDT	Severe Thunderstorm Warning	OUN	Harmon, Jackson	51 min
May 16, 6:13 PM CDT	Tornado Warning Tornado observed	OUN	Beckham, Greer	47 min
May 16, 6:39 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Dewey, Ellis, Roger Mills, Woodward	66 min
May 16, 6:43 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon, Jackson	47 min
May 16, 6:44 PM CDT	Tornado Warning	OUN	Custer, Dewey, Ellis, Roger Mills	46 min
May 16, 6:48 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Custer, Washita	42 min
May 16, 6:54 PM CDT	Tornado Warning Tornado observed	OUN	Beckham, Washita	51 min

Nearby

Tornado Warnings in Oklahoma, 2017 Every tornado warning in 2017 Tornadoes in 2017

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.