Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 2, NWS Tulsa, OK

February 28, 2017Nowata County, Washington County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Feb 28, 2017, 11:10 PM CST for Nowata County, Washington County, Oklahoma. It was in force for 50 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: Feb 28, 2017, 11:10 PM CST (05:10 UTC)
Expired: Mar 1, 2017, 12:00 AM CST
In force: 50 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Nowata County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 86 km from the middle of the area, began a volume at 05:12 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
Feb 28, 11:10 PM CST	HAIL 1	3 N Copan, OK	NICKEL TO QUARTER SIZED HAIL AT HIGHWAY 75 AND W 500 RD.

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
Feb 28, 9:04 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 5.2 hours before the alert went out and 163 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: 1117 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 931 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 341 m²/s²
0-3 km storm-relative helicity: 315 m²/s²
Significant tornado parameter: 2.3
Supercell composite: 8.2

Open this sounding in Storm Lab

The text

As transmitted.

092 
WUUS54 KTSA 010510
SVRTSA
OKC105-147-010600-
/O.NEW.KTSA.SV.W.0002.170301T0510Z-170301T0600Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tulsa OK
1110 PM CST TUE FEB 28 2017

The National Weather Service in Tulsa has issued a

* Severe Thunderstorm Warning for...
  Northeastern Washington County in northeastern Oklahoma...
  Northern Nowata County in northeastern Oklahoma...

* Until midnight CST

* At 1110 PM CST, a severe thunderstorm was located 3 miles southeast
  of Caney, moving east at 50 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

A tornado watch remains in effect until 400 AM CST for northeastern
Oklahoma.

LAT...LON 3694 9541 3686 9594 3700 9599 3700 9541
TIME...MOT...LOC 0510Z 254DEG 43KT 3697 9589 

HAIL...1.00IN
WIND...60MPH
 
$$

Lacy

3 follow-up statements

243 
WWUS54 KTSA 010526
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
1126 PM CST TUE FEB 28 2017

OKC105-147-010600-
/O.CON.KTSA.SV.W.0002.000000T0000Z-170301T0600Z/
Washington OK-Nowata OK-
1126 PM CST TUE FEB 28 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CST
FOR NORTHEASTERN WASHINGTON AND NORTHERN NOWATA COUNTIES...

At 1126 PM CST, a severe thunderstorm was located near Wann, moving
east at 50 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

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

The previous storm that initiated the warning has moved into Kansas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

A tornado watch remains in effect until 400 AM CST for northeastern
Oklahoma.

LAT...LON 3687 9587 3700 9585 3700 9541 3694 9541
TIME...MOT...LOC 0526Z 252DEG 44KT 3694 9578 

HAIL...1.00IN
WIND...60MPH
 
$$

Lacy

570 
WWUS54 KTSA 010544
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
1144 PM CST TUE FEB 28 2017

OKC147-010554-
/O.CAN.KTSA.SV.W.0002.000000T0000Z-170301T0600Z/
Washington OK-
1144 PM CST TUE FEB 28 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WASHINGTON COUNTY
IS CANCELLED...
    
The severe 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 400 AM CST for northeastern
Oklahoma.

LAT...LON 3692 9557 3700 9558 3700 9541 3694 9541
TIME...MOT...LOC 0544Z 254DEG 43KT 3700 9552 

$$

OKC105-010600-
/O.CON.KTSA.SV.W.0002.000000T0000Z-170301T0600Z/
Nowata OK-
1144 PM CST TUE FEB 28 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CST
FOR NORTHEASTERN NOWATA COUNTY...

At 1144 PM CST, a severe thunderstorm was located 5 miles east of
South Coffeyville, moving east at 50 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

This severe thunderstorm will remain over mainly rural areas of
northeastern Nowata County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

A tornado watch remains in effect until 400 AM CST for northeastern
Oklahoma.

LAT...LON 3692 9557 3700 9558 3700 9541 3694 9541
TIME...MOT...LOC 0544Z 254DEG 43KT 3700 9552 

HAIL...1.00IN
WIND...60MPH
 
$$

Lacy

080 
WWUS54 KTSA 010552
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
1152 PM CST TUE FEB 28 2017

OKC105-010601-
/O.EXP.KTSA.SV.W.0002.000000T0000Z-170301T0600Z/
Nowata OK-
1152 PM CST TUE FEB 28 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN NOWATA COUNTY
WILL EXPIRE AT MIDNIGHT CST...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore the warning will be
allowed to expire.

A tornado watch remains in effect until 400 AM CST for northeastern
Oklahoma.

LAT...LON 3692 9557 3700 9558 3700 9541 3694 9541
TIME...MOT...LOC 0551Z 254DEG 43KT 3702 9543 

$$

Lacy

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 28, 10:29 PM CST	Severe Thunderstorm Warning	TSA	Osage	31 min
Feb 28, 10:42 PM CST	Special Weather Statement	TSA	Washington	33 min
Feb 28, 10:59 PM CST	Special Weather Statement	TSA	Washington	31 min
Feb 28, 11:06 PM CST	Special Weather Statement	TSA	Craig, Nowata, Washington	24 min
Feb 28, 11:35 PM CST	Special Weather Statement	TSA	Craig, Nowata, Ottawa	55 min
Feb 28, 11:39 PM CST	Special Weather Statement	TSA	Haskell, Pittsburg	36 min
Feb 28, 11:50 PM CST	Severe Thunderstorm Warning	TSA	Pittsburg	40 min
Mar 1, 12:19 AM CST	Severe Thunderstorm Warning	TSA	Latimer, Pittsburg	56 min
Mar 1, 12:26 AM CST	Special Weather Statement	TSA	Haskell, Sequoyah	34 min
Mar 1, 12:40 AM CST	Special Weather Statement	TSA	Pushmataha	50 min
Mar 1, 12:47 AM CST	Severe Thunderstorm Warning	TSA	LeFlore, Sequoyah	43 min
Mar 1, 12:49 AM CST	Severe Thunderstorm Warning	TSA	Latimer, LeFlore, Pittsburg, Pushmataha	41 min
Mar 1, 12:52 AM CST	Severe Thunderstorm Warning	TSA	Haskell, Latimer, LeFlore	38 min
Mar 1, 1:09 AM CST	Special Weather Statement	TSA	Choctaw	51 min
Mar 1, 1:19 AM CST	Special Weather Statement	TSA	Adair, Cherokee	26 min
Mar 1, 1:27 AM CST	Special Weather Statement	TSA	LeFlore	33 min
Mar 1, 1:43 AM CST	Special Weather Statement	TSA	Adair, Cherokee	32 min
Mar 1, 2:07 AM CST	Special Weather Statement	TSA	Adair	38 min
Mar 1, 1:27 PM CST	Red Flag Warning	TSA	Adair, Cherokee, Choctaw, Creek, Haskell, Latimer and 13 more	6 hr

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2017 Every severe thunderstorm warning 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.