Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 151, NWS Tulsa, OK

May 4, 2020Craig County, Nowata County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 4, 2020, 4:04 PM CDT for Craig County, Nowata County, Oklahoma. It was in force for 41 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: May 4, 2020, 4:04 PM CDT (21:04 UTC)
Expired: May 4, 2020, 4:45 PM CDT
In force: 41 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Hail: 1.25 in
Wind: 50.0 mph

Counties Craig County, OK, Nowata County, OK

The radar

The Tulsa radar (KINX), 82 km from the middle of the area, began a volume at 21:05 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

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 4, 2:32 PM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 9.1 hours before the alert went out and 145 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: 988 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 99 m²/s²
0-3 km storm-relative helicity: 190 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

As transmitted.

386 
WUUS54 KTSA 042104
SVRTSA
OKC035-105-042145-
/O.NEW.KTSA.SV.W.0151.200504T2104Z-200504T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tulsa OK
404 PM CDT Mon May 4 2020

The National Weather Service in Tulsa has issued a

* Severe Thunderstorm Warning for...
  Northwestern Craig County in northeastern Oklahoma...
  Northeastern Nowata County in northeastern Oklahoma...

* Until 445 PM CDT.

* At 404 PM CDT, a severe thunderstorm was located 9 miles east of
  Lenapah, moving northeast at 35 mph.

  HAZARD...Half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* This severe thunderstorm will remain over mainly rural areas of
  northwestern Craig and northeastern Nowata Counties.

A Tornado Watch remains in effect until 1000 PM CDT for northeastern
Oklahoma.

LAT...LON 3680 9548 3692 9560 3700 9545 3700 9515
TIME...MOT...LOC 2104Z 240DEG 28KT 3689 9546 

HAIL...1.25IN
WIND...<50MPH
 
$$

3 follow-up statements

535 
WWUS54 KTSA 042115
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
415 PM CDT Mon May 4 2020

OKC035-105-042145-
/O.CON.KTSA.SV.W.0151.000000T0000Z-200504T2145Z/
Craig OK-Nowata OK-
415 PM CDT Mon May 4 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR NORTHWESTERN CRAIG AND NORTHEASTERN NOWATA COUNTIES...

At 414 PM CDT, severe thunderstorms were located along a line
extending from 8 miles east of Lenapah to 8 miles south of Edna,
moving northeast at 45 mph.

HAZARD...Ping pong ball size hail.

SOURCE...Radar indicated.

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

These severe thunderstorms will remain over mainly rural areas of
northwestern Craig and northeastern Nowata Counties.

A Tornado Watch remains in effect until 1000 PM CDT for northeastern
Oklahoma.

LAT...LON 3680 9548 3692 9560 3700 9545 3700 9515
TIME...MOT...LOC 2114Z 246DEG 37KT 3686 9548 3694 9533 

HAIL...1.50IN
WIND...<50MPH
 
$$

412 
WWUS54 KTSA 042121
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
421 PM CDT Mon May 4 2020

OKC035-105-042145-
/O.CON.KTSA.SV.W.0151.000000T0000Z-200504T2145Z/
Craig OK-Nowata OK-
421 PM CDT Mon May 4 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR NORTHWESTERN CRAIG AND NORTHEASTERN NOWATA COUNTIES...

At 421 PM CDT, severe thunderstorms were located along a line
extending from 11 miles east of Lenapah to 7 miles southeast of Edna,
moving northeast at 30 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.

These severe thunderstorms will remain over mainly rural areas of
northwestern Craig and northeastern Nowata Counties.

A Tornado Watch remains in effect until 1000 PM CDT for northeastern
Oklahoma.

LAT...LON 3684 9541 3691 9553 3700 9540 3700 9515
TIME...MOT...LOC 2121Z 240DEG 28KT 3688 9543 3696 9528 

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

173 
WWUS54 KTSA 042134
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
434 PM CDT Mon May 4 2020

OKC105-042143-
/O.CAN.KTSA.SV.W.0151.000000T0000Z-200504T2145Z/
Nowata OK-
434 PM CDT Mon May 4 2020

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN NOWATA COUNTY IS
CANCELLED...

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

A Tornado Watch remains in effect until 1000 PM CDT for northeastern
Oklahoma.

LAT...LON 3689 9532 3692 9539 3700 9538 3700 9515
TIME...MOT...LOC 2133Z 240DEG 28KT 3693 9533 3701 9518 

$$

OKC035-042145-
/O.CON.KTSA.SV.W.0151.000000T0000Z-200504T2145Z/
Craig OK-
434 PM CDT Mon May 4 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR NORTHWESTERN CRAIG COUNTY...

At 433 PM CDT, severe thunderstorms were located along a line
extending from 9 miles south of Edna to 5 miles southwest of Chetopa,
moving northeast at 30 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.

These severe thunderstorms will remain over mainly rural areas of
northwestern Craig County.

A Tornado Watch remains in effect until 1000 PM CDT for northeastern
Oklahoma.

LAT...LON 3689 9532 3692 9539 3700 9538 3700 9515
TIME...MOT...LOC 2133Z 240DEG 28KT 3693 9533 3701 9518 

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

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Tulsa, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at May 4, 2:31 PM CDT, 1 hour 33 minutes earlier.

Area forecast discussion, May 4, 2:31 PM CDT, 1 hour 33 minutes before

Area Forecast Discussion
National Weather Service Tulsa OK
231 PM CDT Mon May 4 2020

...SEVERE WEATHER EXPECTED THIS AFTERNOON AND EVENING...

.DISCUSSION...
Atmosphere has become extremely unstable this afternoon with
MLCAPES approaching 4500 J/KG just west of the area across north-
central Oklahoma. Cold front currently moving into far northwest
Osage county with pre-frontal boundary located slightly further
south, near a Ralston, Copan line. Latest CAMs and surface
analysis trends indicate scattered supercells will quickly
develop along frontal boundary in the 3-5 PM range just north of
I-44 with 0-6 KM deep layer shear remaining in 40 to 50 knot
range. Very large hail to baseballs and damaging winds to 70 mph
will be possible in the stronger cells. Although low level wind
fields in the 0-1 KM range are not overly impressive, given the
extreme instability, any deviant storm motion, with a more
southern track, would likely enhance SRH/tornado threat. In
addition, winds are little more backed/stronger across far
northeast Oklahoma and northwest Arkansas near warm front, where a
tornado or two will also be possible. Storms will likely become
more linear with time with multiple strong to severe thunderstorm
clusters pushing into southeast Oklahoma and northeast Arkansas
this evening, transitioning towards a damaging wind threat.

Significantly cooler weather expected behind front Tuesday into
Wednesday as surface high pressure builds over the region. Models
remain in good agreement with stronger upper shortwave moving out
of the northern Rockies and into the central Plains on Thursday.
Shower/thunderstorm chances will begin to ramp up Thursday
afternoon into Thursday night with widespread rain expected with
FROPA. NBM guidance looks good for the remainder of the extended
periods.

&&

.PRELIMINARY POINT TEMPS/POPS...
TUL   55  74  50  75 /  40   0   0   0
FSM   58  76  49  77 /  70   0   0   0
MLC   57  74  49  77 /  70   0   0   0
BVO   53  73  48  74 /  10   0   0   0
FYV   54  71  46  72 /  80   0   0   0
BYV   53  70  45  71 /  80   0   0   0
MKO   55  72  49  74 /  80   0   0   0
MIO   53  70  46  71 /  70   0   0   0
F10   55  73  49  76 /  70   0   0   0
HHW   60  75  51  77 /  50  10   0   0

&&

.TSA WATCHES/WARNINGS/ADVISORIES...
OK...None.
AR...None.
&&

LONG TERM....12

Hazardous weather outlook, May 4, 1:01 PM CDT, 3 hours 3 minutes before

Hazardous Weather Outlook
National Weather Service Tulsa OK
101 PM CDT Mon May 4 2020

ARZ001-002-010-011-019-020-029-OKZ049-053>076-051045-
Adair OK-Benton AR-Carroll AR-Cherokee OK-Choctaw OK-Craig OK-
Crawford AR-Creek OK-Delaware OK-Franklin AR-Haskell OK-Latimer OK-
Le Flore OK-Madison AR-Mayes OK-McIntosh OK-Muskogee OK-Nowata OK-
Okfuskee OK-Okmulgee OK-Osage OK-Ottawa OK-Pawnee OK-Pittsburg OK-
Pushmataha OK-Rogers OK-Sebastian AR-Sequoyah OK-Tulsa OK-Wagoner OK-
Washington OK-Washington AR-
101 PM CDT Mon May 4 2020

...SIGNIFICANT SEVERE STORM POTENTIAL LATE AFTERNOON AND
EVENING...VERY LARGE HAIL...DAMAGING WINDS AND ONE OR TWO
STRONG TORNADOES...

This Outlook is for Northwest and West Central Arkansas as well as
much of Eastern Oklahoma.

.DAY ONE...This Afternoon and Tonight.

TORNADO.
	RISK...Elevated.
	AREA....Northeast Oklahoma and Northwest Arkansas
    ONSET...After 4 pm.

SEVERE THUNDERSTORM.
	RISK...Critical.
	AREA...Eastern Oklahoma and Northwest Arkansas.
	ONSET...After 4 pm.

	AREA AT GREATEST RISK...Northeast Oklahoma.

FLASH FLOOD.
	RISK...Limited.
	AREA...Eastern Oklahoma and Northwest Arkansas.
	ONSET...Late Afternoon.

DISCUSSION...
An extremely unstable airmass will be in place this afternoon
across all of eastern Oklahoma and northwest Arkansas.
Thunderstorms are expected to develop along a cold front that will
be entering northeast Oklahoma later this afternoon. Storms along
the front will quickly become severe, with several clusters of
storms expected as the front moves through eastern Oklahoma and
northwest Arkansas later this afternoon and evening. A
few tornadoes, with one or two strong tornadoes, are possible.
Very large hail to baseball size and winds to 70 mph will also be
possible with the strongest storms.

Here is the latest timing for the expected severe weather:

Northeast Oklahoma - 4 to 7 pm.
Southeast Oklahoma and northwest Arkansas - 6 pm to Midnight.

Be weather aware this afternoon and evening. Make sure you have
multiple ways to receive severe weather watch and warning
information. Be prepared to take swift action if a warning is
issued for your area.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
Activation of the Regional Spotter Network Expected.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.
TUESDAY and WEDNESDAY...No Hazards.
THURSDAY...Thunderstorm Potential...Heavy Rain Potential.
FRIDAY...Thunderstorm Potential.
SATURDAY and SUNDAY...No Hazards.

EXTENDED DISCUSSION...
After a dry Tuesday and Wednesday, thunderstorm chances along with
a severe weather threat returning for Thursday into early Friday.

weather.gov/tulsa contains additional information.

In the hours before

Local storm report, May 4, 11:51 AM CDT, 4 hours 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1151 AM CDT MON MAY 4 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0908 AM     HAIL             PICHER                  36.99N 94.83W
05/04/2020  E1.75 INCH       OTTAWA             OK   EMERGENCY MNGR

1050 AM     HAIL             3 W BENTONVILLE         36.37N 94.26W
05/04/2020  M1.00 INCH       BENTON             AR   TRAINED SPOTTER

&&

PBS

Local storm report, May 4, 12:54 PM CDT, 3 hours 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1254 PM CDT MON MAY 4 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1015 AM     HAIL             SHADY GROVE             36.15N 94.14W
05/04/2020  M4.00 INCH       WASHINGTON         AR   TRAINED SPOTTER

            AUTOMOBILE DENTED, WINDSHIELD BROKEN. DENTED METAL ROOF.

&&

PBS

Local storm report, May 4, 2:22 PM CDT, 1 hour 42 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
222 PM CDT MON MAY 4 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0907 AM     HAIL             2 N MIAMI               36.90N 94.88W
05/04/2020  E2.00 INCH       OTTAWA             OK   TRAINED SPOTTER

&&

KAH

Special weather statement, May 4, 3:52 PM CDT, 12 minutes before

Special Weather Statement
National Weather Service Tulsa OK
352 PM CDT Mon May 4 2020

OKZ055-042115-
Washington OK-
352 PM CDT Mon May 4 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN WASHINGTON COUNTY UNTIL
415 PM CDT...

At 351 PM CDT, a strong thunderstorm was located 3 miles south of
Ochelata, moving east at 20 mph.

Penny size hail will be possible with this storm.

Locations in or near the path include...
Ramona...                         Ochelata...

A Tornado Watch remains in effect until 1000 PM CDT for northeastern
Oklahoma.

LAT...LON 3655 9583 3652 9600 3664 9600 3667 9589
TIME...MOT...LOC 2051Z 261DEG 16KT 3655 9599

Special weather statement, May 4, 3:53 PM CDT, 11 minutes before

Special Weather Statement
National Weather Service Tulsa OK
353 PM CDT Mon May 4 2020

OKZ056-057-042130-
Craig OK-Nowata OK-
353 PM CDT Mon May 4 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN CRAIG AND
NORTHEASTERN NOWATA COUNTIES UNTIL 430 PM CDT...

At 353 PM CDT, a strong thunderstorm was located 4 miles east of
Lenapah, moving northeast at 40 mph.

Penny size hail will be possible with this storm.

Locations in or near the path include...
Lenapah...                        Hollow...

A Tornado Watch remains in effect until 1000 PM CDT for northeastern
Oklahoma.

LAT...LON 3692 9511 3672 9559 3690 9568 3700 9548
      3700 9538
TIME...MOT...LOC 2053Z 246DEG 37KT 3685 9556

Special weather statement, May 4, 4:01 PM CDT, 3 minutes before

Special Weather Statement
National Weather Service Tulsa OK
401 PM CDT Mon May 4 2020

OKZ055-056-061-042130-
Rogers OK-Nowata OK-Washington OK-
401 PM CDT Mon May 4 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN ROGERS...SOUTHERN
WASHINGTON AND SOUTHWESTERN NOWATA COUNTIES UNTIL 430 PM CDT...

At 401 PM CDT, a strong thunderstorm was located 3 miles northeast of
Ramona, moving northeast at 25 mph.

Penny size hail will be possible with this storm.

Locations in or near the path include...
Ramona...                         Ochelata...

A Tornado Watch remains in effect until 1000 PM CDT for northeastern
Oklahoma.

LAT...LON 3672 9575 3657 9566 3649 9600 3663 9600
TIME...MOT...LOC 2101Z 246DEG 21KT 3658 9589

The office that day

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

Issued	Product	Office	Counties	Lasted
May 4, 8:05 AM CDT	Special Weather Statement	TSA	Craig	40 min
May 4, 8:12 AM CDT	Severe Thunderstorm Warning	TSA	Craig, Mayes, Rogers	48 min
May 4, 8:19 AM CDT	Severe Thunderstorm Warning	TSA	Craig, Nowata	40 min
May 4, 8:22 AM CDT	Severe Thunderstorm Warning	TSA	Haskell, Latimer	53 min
May 4, 8:41 AM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Mayes, Ottawa	64 min
May 4, 8:51 AM CDT	Severe Thunderstorm Warning	TSA	Craig, Ottawa	39 min
May 4, 8:55 AM CDT	Severe Thunderstorm Warning	TSA	Delaware	65 min
May 4, 9:15 AM CDT	River Flood Warning	TSA	Ottawa	11 hr
May 4, 9:18 AM CDT	Severe Thunderstorm Warning	TSA	Adair, Delaware	57 min
May 4, 9:26 AM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Ottawa	49 min
May 4, 9:32 AM CDT	Severe Thunderstorm Warning	TSA	Craig, Ottawa	43 min
May 4, 3:05 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Osage, Rogers, Washington	55 min
May 4, 3:52 PM CDT	Special Weather Statement	TSA	Washington	23 min
May 4, 3:53 PM CDT	Special Weather Statement	TSA	Nowata	37 min
May 4, 4:01 PM CDT	Special Weather Statement	TSA	Washington	29 min
May 4, 4:32 PM CDT	Special Weather Statement	TSA	Ottawa	28 min
May 4, 4:44 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Rogers, Washington	31 min
May 4, 4:53 PM CDT	Special Weather Statement	TSA	Craig	37 min
May 4, 4:57 PM CDT	Special Weather Statement	TSA	Tulsa	33 min
May 4, 5:01 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Muskogee, Okmulgee, Tulsa, Wagoner	44 min
May 4, 5:06 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee, Okmulgee	54 min
May 4, 5:10 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Mayes, Rogers	50 min
May 4, 5:12 PM CDT	Severe Thunderstorm Warning	TSA	Ottawa	33 min
May 4, 5:16 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Rogers, Tulsa, Wagoner	44 min
May 4, 5:18 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Ottawa	42 min
May 4, 5:31 PM CDT	Severe Thunderstorm Warning	TSA	Mayes, Rogers	29 min
May 4, 5:46 PM CDT	Severe Thunderstorm Warning	TSA	Ottawa	29 min
May 4, 5:58 PM CDT	Special Weather Statement	TSA	Okfuskee, Okmulgee, Wagoner	32 min
May 4, 5:58 PM CDT	Severe Thunderstorm Warning	TSA	Mayes	32 min
May 4, 6:04 PM CDT	Severe Thunderstorm Warning	TSA	Okmulgee	41 min
May 4, 6:10 PM CDT	Severe Thunderstorm Warning	TSA	Rogers	35 min
May 4, 6:14 PM CDT	Severe Thunderstorm Warning	TSA	Ottawa	10 min
May 4, 6:27 PM CDT	Severe Thunderstorm Warning	TSA	Mayes	33 min
May 4, 6:33 PM CDT	Special Weather Statement	TSA	Ottawa	27 min
May 4, 6:37 PM CDT	Severe Thunderstorm Warning	TSA	Muskogee, Okmulgee	27 min
May 4, 6:39 PM CDT	Severe Thunderstorm Warning	TSA	Mayes, Rogers	36 min
May 4, 6:50 PM CDT	Special Weather Statement	TSA	Okfuskee	25 min
May 4, 6:51 PM CDT	Areal Flood Advisory	TSA	Delaware, Mayes	3 hr
May 4, 6:51 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Delaware, Mayes	39 min
May 4, 6:59 PM CDT	Severe Thunderstorm Warning	TSA	Mayes, Rogers, Wagoner	46 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2020 Every severe thunderstorm warning 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.