Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 272, NWS Norman, OK

June 2, 2021Tillman County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jun 2, 2021, 3:24 PM CDT for Tillman County, Oklahoma. It was in force for 51 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: Jun 2, 2021, 3:24 PM CDT (20:24 UTC)
Expired: Jun 2, 2021, 4:15 PM CDT
In force: 51 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Tillman County, OK

The radar

The Altus AFB radar (KFDR), 18 km from the middle of the area, began a volume at 20:23 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
Jun 2, 3:55 PM CDT	HAIL 1.75	Hollister, OK

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 31 minutes after it went out.

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 nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 8.4 hours before the alert went out and 218 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: 914 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 13 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

684 
WUUS54 KOUN 022024
SVROUN
OKC141-022115-
/O.NEW.KOUN.SV.W.0272.210602T2024Z-210602T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
324 PM CDT Wed Jun 2 2021

The National Weather Service in Norman has issued a

* Severe Thunderstorm Warning for...
  Central Tillman County in southwestern Oklahoma...

* Until 415 PM CDT.

* At 324 PM CDT, a severe thunderstorm was located 5 miles southeast
  of Manitou, moving southeast at 15 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 impacted include...
  Manitou, Hollister and Loveland. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3417 9881 3447 9904 3455 9892 3436 9866
      3433 9866 3433 9861
TIME...MOT...LOC 2024Z 318DEG 13KT 3445 9891 

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

MAD

2 follow-up statements

831 
WWUS54 KOUN 022045
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
345 PM CDT Wed Jun 2 2021

OKC141-022115-
/O.CON.KOUN.SV.W.0272.000000T0000Z-210602T2115Z/
Tillman OK-
345 PM CDT Wed Jun 2 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM CDT
FOR SOUTHEASTERN TILLMAN COUNTY...

At 345 PM CDT, a severe thunderstorm was located near Hollister,
moving southeast at 15 mph.

HAZARD...Golf ball size hail and 70 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect 
         considerable tree damage. Wind damage is also likely to 
         mobile homes, roofs, and outbuildings.

Locations impacted include...
Hollister and Loveland. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3417 9881 3441 9895 3447 9886 3436 9866
      3433 9866 3433 9861
TIME...MOT...LOC 2045Z 318DEG 13KT 3439 9885 

HAIL...1.75IN
WIND...70MPH
 
$$

MAD

558 
WWUS54 KOUN 022106
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
406 PM CDT Wed Jun 2 2021

OKC141-022115-
/O.CON.KOUN.SV.W.0272.000000T0000Z-210602T2115Z/
Tillman OK-
406 PM CDT Wed Jun 2 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM CDT
FOR SOUTHEASTERN TILLMAN COUNTY...

At 405 PM CDT, a severe thunderstorm was located near Loveland, 
moving southeast at 15 mph. Golf ball size hail was reported in 
Hollister at 4 PM.

HAZARD...Golf ball size hail and 70 mph wind gusts.

SOURCE...Trained weather spotters.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect 
         considerable tree damage. Wind damage is also likely to 
         mobile homes, roofs, and outbuildings.

Locations impacted include...
Hollister and Loveland. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3434 9891 3438 9883 3428 9868 3417 9881
TIME...MOT...LOC 2105Z 329DEG 13KT 3430 9883 

HAIL...1.75IN
WIND...70MPH
 
$$

MAD

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 Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 2, 1:24 PM CDT, 2 hours earlier.

Area forecast discussion, Jun 2, 1:24 PM CDT, 2 hours before

Area Forecast Discussion
National Weather Service Norman OK
124 PM CDT Wed Jun 2 2021

...New SHORT TERM...

.SHORT TERM...
(This evening through Thursday)
Issued at 121 PM CDT Wed Jun 2 2021

Widely scattered showers and a few thunderstorms continue to develop
across much of the area as a remnant MCV at the base of the upper
trough continues to rotate across central OK. So far convection has
been fairly weak/shallow and the majority of it is likely to remain
this way. The environment across southern OK is a bit more
supportive of perhaps some marginally severe hail as effective
shear of 30-35 knots and steeper lapse rates have the potential to
sustain more robust updrafts. CAM guidance has overall been
inconsistent on whether such storms will develop, but the most
likely corridor appears to be along the weak differential heating
zone across southwest OK between about 2-5pm this afternoon where
instability/shear are maximized.

Storms should diminish with the loss of daytime heating and the
departure of the MCV to the east. Additional storms may try to make
a run at our western north TX counties overnight but the more likely
scenario is they remain mostly to our south where the environment
will be more favorable to sustain these storms overnight. Weak winds
and a moist boundary layer may also lead to fog development once
again tonight across central/southern OK.

Thursday will likely offer a rare break from our wet pattern as the
upper trough moves slowly east of our area. Expect clouds to
decrease through the morning outside of areas along the Red River in
closer proximity to remnant MCS cloud debris where a low rain chance
will also persist into the afternoon. High will still be on the cool
side for this time of year (but warmer than they have been),
reaching into the low 80s for much of the area.

Ware

&&

.LONG TERM...
(Thursday night through next Tuesday)
Issued at 112 PM CDT Wed Jun 2 2021

The long term portion starts off on Friday in transition between a
departing trough and an approaching cut off low, giving us a bit of
a lull in precipitation chances and an opportunity to see some sun.
An exception to this will be along and south of the Red River where
moisture content will remain very high keeping clouds and low PoPs
around.

The cut-off low will slowly move in from the south over the weekend,
causing cloud cover and rain chances to inch their way northward
until they cover most of the forecast area by Sunday afternoon. This
pattern will persist through at least mid week next week,
maintaining at least low rain chances and extensive cloud cover each
day. Temperatures will generally maintain in the upper 70s to mid
80s.

Models suggest the upper low will depart during the second half of
next week, though cluster analysis highlights some uncertainty in
the timing.

Day

&&

.AVIATION...
(18Z TAFS)
Issued at 1209 PM CDT Wed Jun 2 2021

Mainly VFR conditions are forecast outside of potential scattered
showers and thunderstorms during the early to mid afternoon hours.
Wind will remain light and variable at times, becoming mostly
southerly this evening and overnight. Patchy fog is possible early
tomorrow morning around sunrise, especially over areas that
receive rain today, but the chance was too low to include in the
TAF at this time.

&&

.UPPER AIR...
Issued at 325 AM CDT Fri May 28 2021

No Upper Air flights are currently planned.

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  59  80  62  83 /  20  20   0   0
Hobart OK         59  83  61  86 /  10  10   0   0
Wichita Falls TX  61  82  63  84 /  30  30   0  10
Gage OK           55  83  59  86 /  10   0   0   0
Ponca City OK     57  80  60  85 /  10  10   0   0
Durant OK         60  81  63  82 /  40  40  10  20

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...None.
TX...None.
&&

SHORT TERM...08
LONG TERM....14
AVIATION...08

Hazardous weather outlook, Jun 2, 12:07 PM CDT, 3 hours 17 minutes before

Hazardous Weather Outlook
National Weather Service Norman OK
1207 PM CDT Wed Jun 2 2021

OKZ004>048-050>052-TXZ083>090-031215-
Harper-Woods-Alfalfa-Grant-Kay-Ellis-Woodward-Major-Garfield-
Noble-Roger Mills-Dewey-Custer-Blaine-Kingfisher-Logan-Payne-
Beckham-Washita-Caddo-Canadian-Oklahoma-Lincoln-Grady-McClain-
Cleveland-Pottawatomie-Seminole-Hughes-Harmon-Greer-Kiowa-Jackson-
Tillman-Comanche-Stephens-Garvin-Murray-Pontotoc-Coal-Cotton-
Jefferson-Carter-Johnston-Atoka-Love-Marshall-Bryan-Hardeman-
Foard-Wilbarger-Wichita-Knox-Baylor-Archer-Clay-
1207 PM CDT Wed Jun 2 2021

This hazardous weather outlook is for portions of northern...
western...central...and southern Oklahoma...and western north
Texas.

.DAY ONE...Through tonight...

.Thunderstorms...
Widely scattered thunderstorms will develop this afternoon and
evening, as an upper air disturbance moves southeastward across
Oklahoma. A few strong to perhaps severe storms may develop
across parts of southern Oklahoma and western north Texas. Hail
and gusty winds are possible with the stronger storms.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday...

.Thunderstorms...
Thunderstorm chances are rather low Thursday through Saturday,
but will increase late in the weekend as an upper low approaches
the area. Storms will be most numerous in the southeast half of
Oklahoma, and the chances for thunderstorms will be highest on
Sunday and Monday. Organized severe storms are not expected.

Get graphics and more details at weather.gov/norman...and follow
our weather forecast office on Twitter and Facebook.

In the hours before

Special weather statement, Jun 2, 2:55 PM CDT, 29 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
255 PM CDT Wed Jun 2 2021

TXZ090-022030-
Clay TX-
255 PM CDT Wed Jun 2 2021

...SIGNIFICANT WEATHER ADVISORY FOR central Clay County Until 330 PM
CDT...

AT 254 PM CDT, A strong thunderstorm was reported 5 miles north of
Henrietta, moving southeast at 15 MPH.

HAZARDS INCLUDE...
Hail up to the size of nickels...
Wind gusts to 40 MPH...

LAT...LON 3390 9832 3402 9822 3391 9798 3390 9798
      3391 9797 3389 9798 3380 9798 3370 9807
TIME...MOT...LOC 1954Z 307DEG 14KT 3390 9820

Ware

Special weather statement, Jun 2, 3:07 PM CDT, 17 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
307 PM CDT Wed Jun 2 2021

OKZ008-022030-
Kay OK-
307 PM CDT Wed Jun 2 2021

...SIGNIFICANT WEATHER ADVISORY FOR northeastern Kay County Until 330
PM CDT...

AT 304 PM CDT, a strong thunderstorm was located near Kaw Lake. This
storm was nearly stationary.

HAZARDS INCLUDE...
Hail up to one-half inch diameter...
Wind gusts to 40 MPH...

LAT...LON 3682 9675 3678 9675 3678 9679 3677 9679
      3677 9682 3674 9683 3675 9687 3675 9689
      3672 9692 3669 9693 3668 9695 3678 9706
      3694 9689
TIME...MOT...LOC 2004Z 227DEG 1KT 3677 9690

MAD

Special weather statement, Jun 2, 3:10 PM CDT, 14 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
310 PM CDT Wed Jun 2 2021

OKZ037-022045-
Tillman OK-
310 PM CDT Wed Jun 2 2021

...SIGNIFICANT WEATHER ADVISORY FOR northeastern Tillman County Until
345 PM CDT...

AT 309 PM CDT, a strong thunderstorm was located near Manitou, moving
southeast at 10 MPH.

HAZARDS INCLUDE...
Hail up to one-half inch diameter...
Wind gusts to 40 MPH...

LAT...LON 3460 9896 3460 9892 3452 9882 3451 9883
      3451 9881 3445 9874 3436 9884 3430 9896
      3453 9909
TIME...MOT...LOC 2009Z 323DEG 11KT 3450 9896

MAD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 2, 3:07 PM CDT	Special Weather Statement	OUN	Kay	23 min
Jun 2, 3:10 PM CDT	Special Weather Statement	OUN	Tillman	35 min
Jun 2, 3:29 PM CDT	Special Weather Statement	OUN	Woods	31 min
Jun 2, 3:35 PM CDT	Severe Thunderstorm Warning	OUN	Woods	40 min
Jun 2, 4:08 PM CDT	Severe Thunderstorm Warning	OUN	Tillman	52 min
Jun 2, 4:35 PM CDT	Special Weather Statement	OUN	Alfalfa	25 min
Jun 2, 5:30 PM CDT	Special Weather Statement	OUN	Garfield	30 min
Jun 2, 6:22 PM CDT	Special Weather Statement	OUN	Seminole	23 min
Jun 2, 6:55 PM CDT	Special Weather Statement	OUN	Seminole	50 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2021 Every severe thunderstorm warning in 2021

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.