Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 101, NWS Tulsa, OK

April 21, 20177 counties in Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 21, 2017, 11:39 AM CDT for 7 counties in Oklahoma. It was in force for 51 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 21, 2017, 11:39 AM CDT (16:39 UTC)
Expired: Apr 21, 2017, 12:30 PM CDT
In force: 51 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Cherokee County, OK, Haskell County, OK, Latimer County, OK, McIntosh County, OK, Muskogee County, OK, Pittsburg County, OK, Sequoyah County, OK

The radar

The Western Arkansas radar (KSRX), 114 km from the middle of the area, began a volume at 16:39 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.

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 21, 10:04 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 4.7 hours before the alert went out and 265 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 637 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: -171 m²/s²
0-3 km storm-relative helicity: -150 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

797 
WUUS54 KTSA 211639
SVRTSA
OKC021-061-077-091-101-121-135-211730-
/O.NEW.KTSA.SV.W.0101.170421T1639Z-170421T1730Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tulsa OK
1139 AM CDT FRI APR 21 2017

The National Weather Service in Tulsa has issued a

* Severe Thunderstorm Warning for...
  Haskell County in southeastern Oklahoma...
  Eastern McIntosh County in southeastern Oklahoma...
  Western Sequoyah County in east central Oklahoma...
  Western Latimer County in southeastern Oklahoma...
  Southeastern Cherokee County in east central Oklahoma...
  Pittsburg County in southeastern Oklahoma...
  Muskogee County in east central Oklahoma...

* Until 1230 PM CDT

* At 1139 AM CDT, severe thunderstorms were located along a line
  extending from 2 miles southeast of Taft to 6 miles northeast of
  Eufaula to 4 miles south of Crowder to near Ashland, moving east at
  50 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...Expect damage to roofs, siding, and trees. 

* Locations in or near the path include...
  Muskogee...                       Mcalester...
  Wilburton...                      Eufaula...
  Stigler...                        Checotah...
  Hartshorne...                     Krebs...
  Warner...                         Vian...
  Quinton...                        Gore...
  Kiowa...                          Porum...
  Savanna...                        Webbers Falls...
  Crowder...                        Whitefield...
  Oktaha...                         Alderson...

This includes Interstate 40 in Oklahoma between mile markers 261 and
301.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3467 9588 3468 9589 3471 9609 3477 9609
      3505 9578 3534 9560 3575 9554 3581 9488
      3532 9489 3503 9510 3495 9518 3468 9544
      3468 9551 3460 9552
TIME...MOT...LOC 1639Z 266DEG 42KT 3573 9551 3535 9550 3506 9568 3478
9604

HAIL...<.75IN
WIND...60MPH
 
$$

Lacy

1 follow-up statement

349 
WWUS54 KTSA 211701
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
1201 PM CDT FRI APR 21 2017

OKC091-211711-
/O.CAN.KTSA.SV.W.0101.000000T0000Z-170421T1730Z/
McIntosh OK-
1201 PM CDT FRI APR 21 2017

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN MCINTOSH COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore the warning has been cancelled.

A severe thunderstorm watch remains in effect until 300 PM CDT for
southeastern and east central Oklahoma.

LAT...LON 3465 9576 3478 9581 3501 9563 3530 9536
      3529 9535 3577 9535 3581 9488 3532 9489
      3503 9510 3468 9544 3468 9551 3460 9552
TIME...MOT...LOC 1701Z 266DEG 42KT 3575 9520 3537 9519 3508 9537 3480
9574

$$

OKC021-061-077-101-121-135-211730-
/O.CON.KTSA.SV.W.0101.000000T0000Z-170421T1730Z/
Haskell OK-Sequoyah OK-Latimer OK-Cherokee OK-Pittsburg OK-
Muskogee OK-
1201 PM CDT FRI APR 21 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 PM CDT
FOR HASKELL...WESTERN SEQUOYAH...WESTERN LATIMER...SOUTHEASTERN
CHEROKEE...SOUTHEASTERN PITTSBURG AND EASTERN MUSKOGEE COUNTIES...

At 1201 PM CDT, severe thunderstorms were located along a line
extending from 4 miles southeast of Fort Gibson to 4 miles east of
Porum to 3 miles south of Quinton to 3 miles northeast of Blanco,
moving east at 50 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect damage to roofs, siding, and trees. 

Locations in or near the path include...
Muskogee...                       Wilburton...
Stigler...                        Hartshorne...
Krebs...                          Warner...
Vian...                           Quinton...
Gore...                           Porum...
Webbers Falls...                  Whitefield...
Alderson...                       Kinta...
Braggs...                         Tamaha...
Higgins...                        Greenleaf State Park...
Pumpkin Center...                 Cookson...

This includes Interstate 40 in Oklahoma between mile markers 274 and
301.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3465 9576 3478 9581 3501 9563 3530 9536
      3529 9535 3577 9535 3581 9488 3532 9489
      3503 9510 3468 9544 3468 9551 3460 9552
TIME...MOT...LOC 1701Z 266DEG 42KT 3575 9520 3537 9519 3508 9537 3480
9574

HAIL...<.75IN
WIND...60MPH
 
$$

Lacy

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 21, 1:50 AM CDT	River Flood Warning	TSA	Ottawa	3 days
Apr 21, 1:53 AM CDT	River Flood Warning	TSA	Adair, Delaware	47 hr
Apr 21, 1:53 AM CDT	River Flood Warning	TSA	Cherokee	70 hr
Apr 21, 1:58 AM CDT	River Flood Advisory	TSA	Adair, Cherokee, Delaware	36 hr
Apr 21, 3:29 AM CDT	Special Weather Statement	TSA	Creek	31 min
Apr 21, 3:44 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee	46 min
Apr 21, 4:03 AM CDT	Special Weather Statement	TSA	Okfuskee	42 min
Apr 21, 4:16 AM CDT	Special Weather Statement	TSA	Okmulgee	29 min
Apr 21, 4:42 AM CDT	Special Weather Statement	TSA	McIntosh, Muskogee, Okmulgee	48 min
Apr 21, 5:35 AM CDT	Special Weather Statement	TSA	Muskogee	40 min
Apr 21, 5:49 AM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Haskell, Muskogee, Sequoyah	41 min
Apr 21, 6:22 AM CDT	Severe Thunderstorm Warning	TSA	Adair, LeFlore, Sequoyah	38 min
Apr 21, 8:43 AM CDT	River Flood Warning	TSA	Osage, Tulsa	42 hr
Apr 21, 8:43 AM CDT	River Flood Warning	TSA	Rogers, Tulsa	54 hr
Apr 21, 8:52 AM CDT	River Flood Warning	TSA	Adair, Cherokee, Delaware	56 hr
Apr 21, 9:01 AM CDT	River Flood Advisory	TSA	Cherokee, Delaware	34 hr
Apr 21, 9:01 AM CDT	River Flood Advisory	TSA	Tulsa	52 hr
Apr 21, 9:30 AM CDT	Special Weather Statement	TSA	Okfuskee	30 min
Apr 21, 9:51 AM CDT	Areal Flood Advisory	TSA	Ottawa	3 hr
Apr 21, 9:57 AM CDT	Areal Flood Advisory	TSA	Creek, Rogers, Tulsa, Wagoner	3 hr
Apr 21, 10:08 AM CDT	Severe Thunderstorm Warning	TSA	Okfuskee, Okmulgee	67 min
Apr 21, 10:10 AM CDT	Special Weather Statement	TSA	Creek	65 min
Apr 21, 10:23 AM CDT	Special Weather Statement	TSA	Okmulgee	37 min
Apr 21, 11:00 AM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Muskogee, Okfuskee, Okmulgee, Pittsburg	45 min
Apr 21, 11:03 AM CDT	Special Weather Statement	TSA	Tulsa, Wagoner	42 min
Apr 21, 11:18 AM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Mayes, Muskogee, Okmulgee, Rogers, Tulsa and 1 more	42 min
Apr 21, 11:51 AM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Delaware, Mayes, Muskogee, Wagoner	39 min
Apr 21, 11:53 AM CDT	Flash Flood Warning	TSA	Creek, Rogers, Tulsa, Wagoner	3 hr
Apr 21, 12:07 PM CDT	Areal Flood Advisory	TSA	Cherokee	113 min
Apr 21, 12:10 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Latimer, LeFlore, Pushmataha	35 min
Apr 21, 12:16 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Haskell, LeFlore, Sequoyah	44 min
Apr 21, 12:23 PM CDT	Areal Flood Advisory	TSA	Adair	112 min
Apr 21, 12:38 PM CDT	Severe Thunderstorm Warning	TSA	Latimer, LeFlore, Pushmataha, Sequoyah	52 min
Apr 21, 12:50 PM CDT	Areal Flood Advisory	TSA	Delaware	3 hr
Apr 21, 1:50 PM CDT	River Flood Warning	TSA	Osage	14 hr
Apr 21, 2:03 PM CDT	River Flood Warning	TSA	Ottawa	58 hr
Apr 21, 2:13 PM CDT	Special Weather Statement	TSA	Creek	32 min
Apr 21, 2:15 PM CDT	River Flood Warning	TSA	Creek	24 hr
Apr 21, 2:19 PM CDT	River Flood Warning	TSA	Tulsa	47 hr
Apr 21, 2:23 PM CDT	River Flood Warning	TSA	Washington	37 hr
Apr 21, 2:41 PM CDT	Special Weather Statement	TSA	Creek	34 min
Apr 21, 2:49 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Tulsa	41 min
Apr 21, 2:53 PM CDT	Special Weather Statement	TSA	Creek	37 min
Apr 21, 3:20 PM CDT	Special Weather Statement	TSA	Wagoner	40 min
Apr 21, 3:27 PM CDT	Areal Flood Advisory	TSA	Creek, Tulsa	3 hr
Apr 21, 3:57 PM CDT	Areal Flood Advisory	TSA	Mayes, Rogers, Wagoner	5 hr
Apr 21, 4:38 PM CDT	Special Weather Statement	TSA	Muskogee	37 min
Apr 21, 5:19 PM CDT	Special Weather Statement	TSA	Muskogee	41 min
Apr 21, 5:35 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	55 min
Apr 21, 5:47 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee	43 min
Apr 21, 6:21 PM CDT	Special Weather Statement	TSA	Pittsburg	39 min
Apr 21, 6:30 PM CDT	Areal Flood Advisory	TSA	Creek, Tulsa	2 hr
Apr 21, 6:38 PM CDT	Special Weather Statement	TSA	Haskell	37 min
Apr 21, 6:56 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw	49 min
Apr 21, 6:57 PM CDT	Severe Thunderstorm Warning	TSA	Pushmataha	48 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.