Alert archive / Oklahoma / Special Weather Statements in 2021

Special Weather Statement, NWS Tulsa, OK

April 7, 2021Latimer County, Oklahoma

NWS Tulsa, OK issued this special weather statement at Apr 7, 2021, 3:13 AM CDT for Latimer County, Oklahoma. It was in force for 32 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 7, 2021, 3:13 AM CDT (08:13 UTC)
Expired
Apr 7, 2021, 3:45 AM CDT
In force
32 min
Issued by
NWS Tulsa, OK

County Latimer County, OK

The radar

The Western Arkansas radar (KSRX), 78 km from the middle of the area, began a volume at 08:16 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 nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 8.2 hours before the alert went out and 210 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-pSkew-T log-p diagram, Norman, OK at 00:00Z on 2021-04-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 963 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 00:00Z on 2021-04-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 185 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
963 J/kg
Mixed-layer CIN
-169 J/kg
Mixed-layer LCL
1313 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
185 m²/s²
0-3 km storm-relative helicity
261 m²/s²
Significant tornado parameter
0.2
Supercell composite
7.6

Open this sounding in Storm Lab

The text

As transmitted.

412 
WWUS84 KTSA 070813
SPSTSA

Special Weather Statement
National Weather Service Tulsa OK
313 AM CDT Wed Apr 7 2021
 
OKZ074-075-070845-
Haskell OK-Latimer OK-
313 AM CDT Wed Apr 7 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL HASKELL AND
NORTHERN LATIMER COUNTIES UNTIL 345 AM CDT...

At 313 AM CDT, a strong thunderstorm was located 3 miles east of
Wilburton, moving northeast at 30 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations in or near the path include...
Wilburton...                      Red Oak...
Damon...                          Lequire...
Panola...                         

LAT...LON 3493 9539 3519 9503 3507 9493 3494 9493
      3494 9500 3490 9500 3478 9526
TIME...MOT...LOC 0813Z 234DEG 26KT 3490 9525 

$$

Lacy

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 7, 5:36 AM CDTSpecial Weather StatementTSACherokee24 min
Apr 7, 5:51 AM CDTSpecial Weather StatementTSAAdair24 min
Apr 7, 6:10 AM CDTSpecial Weather StatementTSABenton35 min
Apr 7, 6:34 AM CDTSpecial Weather StatementTSABenton26 min
Apr 7, 1:15 PM CDTSpecial Weather StatementTSASebastian30 min

Nearby

Special Weather Statements in Oklahoma, 2021Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.