Alert archive / Oklahoma / Tornado Watches in 2020

Tornado Watch 2

January 10, 20207 counties in Arkansas; Barry County, McDonald County, Newton County, Missouri; 44 counties in Oklahoma

The Storm Prediction Center issued this tornado watch at Jan 10, 2020, 10:42 AM CST for 7 counties in Arkansas; Barry County, McDonald County, Newton County, Missouri; 44 counties in Oklahoma. It was in force for 10 hr.

The area

The outline as issued.

The facts

Issued
Jan 10, 2020, 10:42 AM CST (16:42 UTC)
Expired
Jan 10, 2020, 8:35 PM CST
In force
10 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
60 kt
All 54 counties

Benton County, AR, Carroll County, AR, Crawford County, AR, Franklin County, AR, Madison County, AR, Sebastian County, AR, Washington County, AR, Barry County, MO, McDonald County, MO, Newton County, MO, Adair County, OK, Atoka County, OK, Bryan County, OK, Carter County, OK, Cherokee County, OK, Choctaw County, OK, Cleveland County, OK, Coal County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Garvin County, OK, Haskell County, OK, Hughes County, OK, Johnston County, OK, Latimer County, OK, LeFlore County, OK, Lincoln County, OK, Logan County, OK, Love County, OK, Marshall County, OK, Mayes County, OK, McClain County, OK, McIntosh County, OK, Murray County, OK, Muskogee County, OK, Nowata County, OK, Okfuskee County, OK, Oklahoma County, OK, Okmulgee County, OK, Osage County, OK, Ottawa County, OK, Pawnee County, OK, Payne County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Pushmataha County, OK, Rogers County, OK, Seminole County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 69 km from the middle of the area, began a volume at 16:43 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 SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
70%
One or more EF2 to EF5 tornadoes
50%
Ten or more severe wind reports
90%
One or more gusts of 65 knots or more
10%
Ten or more severe hail reports
60%
One or more hailstones of 2 inches or more
10%
Six or more combined severe hail and wind reports
95%

Warnings issued inside it

56 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jan 10, 10:42 AM CSTSevere Thunderstorm WarningTSACreek, Okfuskee25 min
Jan 10, 11:27 AM CSTSevere Thunderstorm WarningTSACherokee, Delaware, Mayes, Muskogee, Wagoner48 min
Jan 10, 11:34 AM CSTTornado WarningTSACherokee, Delaware, Mayes, Wagoner41 min
Jan 10, 11:35 AM CSTSevere Thunderstorm WarningTSARogers, Tulsa, Washington25 min
Jan 10, 11:54 AM CSTSevere Thunderstorm WarningTSACraig, Delaware, Mayes, Ottawa51 min
Jan 10, 12:54 PM CSTSevere Thunderstorm WarningTSACherokee, Mayes, Muskogee, Wagoner51 min
Jan 10, 1:03 PM CSTSevere Thunderstorm WarningTSAMcIntosh, Pittsburg42 min
Jan 10, 1:04 PM CSTTornado WarningTSACherokee, Muskogee, Wagoner41 min
Jan 10, 1:11 PM CSTTornado WarningTSAMcIntosh, Pittsburg36 min
Jan 10, 1:14 PM CSTSevere Thunderstorm WarningTSACraig, Nowata27 min
Jan 10, 1:22 PM CSTTornado WarningTSACraig, Nowata16 min
Jan 10, 1:25 PM CSTSevere Thunderstorm WarningOUNAtoka, Bryan, Johnston, Marshall50 min
Jan 10, 1:31 PM CSTTornado WarningTSACherokee, Delaware, Mayes44 min
Jan 10, 1:37 PM CSTTornado WarningTSAMcIntosh, Muskogee, Pittsburg38 min
Jan 10, 2:06 PM CSTTornado WarningTSAMcIntosh, Muskogee39 min
Jan 10, 2:08 PM CSTSevere Thunderstorm WarningOUNAtoka, Coal, Johnston41 min
Jan 10, 2:09 PM CSTTornado WarningTSADelaware9 min
Jan 10, 2:17 PM CSTSevere Thunderstorm WarningOUNAtoka, Coal43 min
Jan 10, 2:20 PM CSTTornado WarningOUNAtoka25 min
Jan 10, 2:25 PM CSTTornado WarningOUNAtoka21 min
Jan 10, 2:29 PM CSTSevere Thunderstorm WarningTSALatimer, McIntosh, Pittsburg46 min
Jan 10, 2:31 PM CSTSevere Thunderstorm WarningOUNLove29 min
Jan 10, 2:34 PM CSTSevere Thunderstorm WarningTSAPittsburg41 min
Jan 10, 2:36 PM CSTTornado WarningTSAAdair, Cherokee, Muskogee39 min
Jan 10, 2:51 PM CSTTornado WarningTSAHaskell, McIntosh, Muskogee, Pittsburg39 min
Jan 10, 2:56 PM CSTSevere Thunderstorm WarningSGFMcDonald, Newton37 min
Jan 10, 3:05 PM CSTSevere Thunderstorm WarningTSAHaskell, Latimer, Pittsburg40 min
Jan 10, 3:12 PM CSTTornado WarningTSABenton28 min
Jan 10, 3:20 PM CSTSevere Thunderstorm WarningSGFBarry, Jasper, Lawrence, McDonald, Newton40 min
Jan 10, 3:21 PM CSTSevere Thunderstorm WarningTSAHaskell, Latimer, LeFlore, McIntosh, Muskogee, Pittsburg and 1 more39 min
Jan 10, 3:25 PM CSTSevere Thunderstorm WarningTSABenton50 min
Jan 10, 3:39 PM CSTSevere Thunderstorm WarningTSABenton36 min
Jan 10, 3:40 PM CSTTornado WarningTSAHaskell, LeFlore, Sequoyah34 min
Jan 10, 3:48 PM CSTTornado WarningSGFBarry, Lawrence, Newton27 min
Jan 10, 3:49 PM CSTSevere Thunderstorm WarningTSABenton, Washington41 min
Jan 10, 3:55 PM CSTSevere Thunderstorm WarningTSAAdair, Cherokee, Haskell, LeFlore, Sequoyah50 min
Jan 10, 4:03 PM CSTFlash Flood WarningSGFBarry, Cedar, Dade, Greene, Jasper, Lawrence and 3 more19 hr
Jan 10, 4:03 PM CSTFlash Flood WarningOUNCoal, Hughes, Johnston, Pontotoc3 hr
Jan 10, 4:12 PM CSTSevere Thunderstorm WarningTSABenton48 min
Jan 10, 4:12 PM CSTFlash Flood WarningOUNCarter, Johnston, Love, Marshall3 hr
Jan 10, 4:14 PM CSTSevere Thunderstorm WarningSGFBarry, Lawrence, McDonald, Newton, Stone46 min
Jan 10, 4:20 PM CSTSevere Thunderstorm WarningOUNBryan, Marshall22 min
Jan 10, 4:24 PM CSTSevere Thunderstorm WarningTSABenton, Crawford, Franklin, Washington51 min
Jan 10, 4:28 PM CSTFlash Flood WarningOUNAtoka, Bryan, Coal, Johnston, Marshall6 hr
Jan 10, 4:53 PM CSTFlash Flood WarningTSACherokee, Haskell, Latimer, McIntosh, Muskogee, Pittsburg and 1 more6 hr
Jan 10, 4:54 PM CSTSevere Thunderstorm WarningSGFBarry, Christian, Lawrence, Stone, Taney66 min
Jan 10, 5:01 PM CSTTornado WarningTSACarroll, Madison, Washington44 min
Jan 10, 5:01 PM CSTFlash Flood WarningSGFBarry, Christian, Dallas, Greene, Laclede, Lawrence and 4 more18 hr
Jan 10, 5:07 PM CSTTornado WarningSGFBarry, Stone23 min
Jan 10, 5:10 PM CSTSevere Thunderstorm WarningTSABenton, Carroll, Madison, Washington48 min
Jan 10, 6:16 PM CSTFlash Flood WarningTSABenton, Carroll, Crawford, Madison, Washington6 hr
Jan 10, 6:37 PM CSTFlash Flood WarningTSACarroll, Crawford, Franklin, Madison, Sebastian, Washington6 hr
Jan 10, 7:01 PM CSTSevere Thunderstorm WarningTSACrawford, Franklin, Sebastian44 min
Jan 10, 7:08 PM CSTTornado WarningTSAChoctaw10 min
Jan 10, 7:36 PM CSTSevere Thunderstorm WarningTSAFranklin24 min
Jan 10, 7:46 PM CSTTornado WarningTSAFranklin13 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 4.7 hours before the alert went out and 192 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, Springfield, MO at 12:00Z on 2020-01-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 619 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, Springfield, MO at 12:00Z on 2020-01-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 176 square meters per square second.1939587897Sfc1 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
619 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
540 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
176 m²/s²
0-3 km storm-relative helicity
178 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.0

Open this sounding in Storm Lab

The text

As transmitted.

095 
WWUS20 KWNS 101639
SEL2  
SPC WW 101639
ARZ000-MOZ000-OKZ000-110000-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 2
NWS Storm Prediction Center Norman OK
1040 AM CST Fri Jan 10 2020

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Northwest Arkansas
  Southwest Missouri
  Central and Eastern Oklahoma

* Effective this Friday morning and evening from 1040 AM until
  600 PM CST.

* Primary threats include...
  A few tornadoes likely with a couple intense tornadoes possible
  Widespread damaging wind gusts to 70 mph likely
  Scattered large hail events to 1.5 inches in diameter likely

SUMMARY...Thunderstorms are intensifying over central Oklahoma, and
should spread eastward through the afternoon across the watch area. 
Parameters are favorable for damaging winds and hail in the stronger
cells, along with an increasing risk of tornadoes as the storms move
eastward.

The tornado watch area is approximately along and 80 statute miles
east and west of a line from 20 miles west northwest of Grove OK to
50 miles east southeast of Ardmore OK. For a complete depiction of
the watch see the associated watch outline update (WOUS64 KWNS
WOU2).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 1...

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 1.5 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 450. Mean
storm motion vector 23035.

...Hart

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 10, 4:53 AM CSTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 19 more2 hr
Jan 10, 1:44 PM CSTMesoscale DiscussionSPCBenton, Crawford, Washington91 min
Jan 10, 4:55 PM CSTMesoscale DiscussionSPCArkansas, Ashley, Baxter, Boone, Bradley, Calhoun and 61 more2 hr
Jan 10, 5:34 PM CSTTornado WatchSPCArkansas, Baxter, Boone, Bradley, Calhoun, Clark and 50 more11 hr
Jan 10, 12:11 PM CSTMesoscale DiscussionSPCBarton, Cedar, Dade, Greene, Hickory, Jasper and 4 more2 hr
Jan 10, 12:54 PM CSTMesoscale DiscussionSPCAndrew, Atchison, Buchanan, Clinton, Daviess, DeKalb and 9 more6 hr
Jan 10, 6:30 AM CSTMesoscale DiscussionSPCAlfalfa, Beckham, Blaine, Caddo, Canadian, Custer and 13 more60 min
Jan 10, 7:44 AM CSTSevere Thunderstorm WatchSPCAlfalfa, Blaine, Custer, Dewey, Garfield, Grant and 12 more67 days
Jan 10, 9:12 AM CSTMesoscale DiscussionSPCAlfalfa, Atoka, Blaine, Caddo, Canadian, Cherokee and 42 more93 min
Jan 10, 11:47 AM CSTMesoscale DiscussionSPCBryan, Choctaw118 min
Jan 10, 1:21 PM CSTMesoscale DiscussionSPCCaddo, Canadian, Comanche, Garfield, Grady, Grant and 2 more54 min

Nearby

Tornado Watches in Oklahoma, 2020Tornado Watches in Arkansas, 2020Tornado Watches in Missouri, 2020Every tornado watch 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.