Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 3, NWS Tulsa, OK

February 28, 2017Pittsburg County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Feb 28, 2017, 11:50 PM CST for Pittsburg County, Oklahoma. It was in force for 40 min. 3 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: Feb 28, 2017, 11:50 PM CST (05:50 UTC)
Expired: Mar 1, 2017, 12:30 AM CST
In force: 40 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Pittsburg County, OK

The radar

The Norman radar (KTLX), 131 km from the middle of the area, began a volume at 05:52 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
Mar 1, 12:12 AM CST	HAIL 1	Mcalester, OK	REPORTED IN NORTHERN PARTS OF THE CITY. ALSO 50 MPH WINDS REPORTED.
Mar 1, 12:15 AM CST	HAIL 1.75	Mcalester, OK	RELAYED VIA BROADCAST MEDIA. TIME ESTIMATED.
Mar 1, 12:21 AM CST	HAIL 1	Mcalester, OK	REPORTED AT INTERSECTION OF STRONG AND ELECTRIC STREET IN TOWN.

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, 11:35 PM CST	Tornado Watch	SPC	5 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 5.8 hours before the alert went out and 138 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: 401 J/kg
Mixed-layer CIN: -184 J/kg
Mixed-layer LCL: 1694 m above ground
0-6 km bulk shear: 74 kt
0-1 km storm-relative helicity: 342 m²/s²
0-3 km storm-relative helicity: 391 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.1

Open this sounding in Storm Lab

The text

As transmitted.

654 
WUUS54 KTSA 010550
SVRTSA
OKC121-010630-
/O.NEW.KTSA.SV.W.0003.170301T0550Z-170301T0630Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tulsa OK
1150 PM CST TUE FEB 28 2017

The National Weather Service in Tulsa has issued a

* Severe Thunderstorm Warning for...
  West central Pittsburg County in southeastern Oklahoma...

* Until 1230 AM CST

* At 1150 PM CST, a severe thunderstorm was located over Stuart,
  moving east at 35 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...
  Mcalester...                      Krebs...
  Savanna...                        Alderson...
  Ashland...                        Haywood...
  Arpelar...                        

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail and damaging winds and 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 600 AM CST for southeastern
Oklahoma.

LAT...LON 3497 9609 3509 9570 3478 9566 3476 9609
TIME...MOT...LOC 0550Z 257DEG 30KT 3487 9611 

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

Lacy

2 follow-up statements

421 
WWUS54 KTSA 010604
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
1204 AM CST WED MAR 1 2017

OKC121-010630-
/O.CON.KTSA.SV.W.0003.000000T0000Z-170301T0630Z/
Pittsburg OK-
1204 AM CST WED MAR 1 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 AM CST
FOR WEST CENTRAL PITTSBURG COUNTY...

At 1204 AM CST, a severe thunderstorm was located over Haywood,
moving east at 35 mph.

HAZARD...60 mph wind gusts and half dollar 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...
Mcalester...                      Krebs...
Savanna...                        Alderson...
Ashland...                        Haywood...
Arpelar...                        

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 600 AM CST for southeastern
Oklahoma.

LAT...LON 3497 9609 3509 9570 3478 9566 3476 9609
TIME...MOT...LOC 0604Z 258DEG 32KT 3489 9594 

HAIL...1.25IN
WIND...60MPH
 
$$

Lacy

981 
WWUS54 KTSA 010610 CCA
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
1210 AM CST WED MAR 1 2017

OKC121-010630-
/O.COR.KTSA.SV.W.0003.000000T0000Z-170301T0630Z/
Pittsburg OK-
1210 AM CST WED MAR 1 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 AM CST
FOR WEST CENTRAL PITTSBURG COUNTY...

At 1209 AM CST, a severe thunderstorm was located 3 miles east of
Haywood, moving east at 40 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees. 

Locations in or near the path include...
Mcalester...                      Krebs...
Savanna...                        Alderson... 
Ashland...                        Haywood... 
Arpelar... 

Another developing severe storm was located just north of Ashland 
and was also moving east at 40 mph. 

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.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

A tornado watch remains in effect until 600 AM CST for southeastern
Oklahoma.

LAT...LON 3497 9609 3509 9570 3478 9566 3476 9609
TIME...MOT...LOC 0604Z 257DEG 34KT 3489 9594 

HAIL...1.75IN
WIND...60MPH
 
$$

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, 11:10 PM CST	Severe Thunderstorm Warning	TSA	Nowata, Washington	50 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
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.