Alert archive / Missouri / Tornado Watches in 2017

Tornado Watch 64

March 6, 20174 states

The Storm Prediction Center issued this tornado watch at Mar 6, 2017, 6:51 PM CST for 4 states. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued
Mar 6, 2017, 6:51 PM CST (00:51 UTC)
Expired
Mar 7, 2017, 2:58 AM CST
In force
8 hr
Issued by
the Storm Prediction Center
Largest hail expected
2.5 in
Strongest gust expected
60 kt
All 85 counties

Benton County, AR, Carroll County, AR, Crawford County, AR, Franklin County, AR, Madison County, AR, Sebastian County, AR, Washington County, AR, Allen County, KS, Bourbon County, KS, Butler County, KS, Chautauqua County, KS, Cherokee County, KS, Cowley County, KS, Crawford County, KS, Elk County, KS, Greenwood County, KS, Labette County, KS, Montgomery County, KS, Neosho County, KS, Wilson County, KS, Woodson County, KS, Barry County, MO, Barton County, MO, Benton County, MO, Camden County, MO, Cedar County, MO, Christian County, MO, Dade County, MO, Dallas County, MO, Dent County, MO, Douglas County, MO, Greene County, MO, Hickory County, MO, Howell County, MO, Jasper County, MO, Laclede County, MO, Lawrence County, MO, Maries County, MO, McDonald County, MO, Miller County, MO, Morgan County, MO, Newton County, MO, Oregon County, MO, Ozark County, MO, Phelps County, MO, Polk County, MO, Pulaski County, MO, Shannon County, MO, St. Clair County, MO, Stone County, MO, Taney County, MO, Texas County, MO, Vernon County, MO, Webster County, MO, Wright County, MO, Adair County, OK, Cherokee County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Haskell County, OK, Hughes County, OK, Kay County, OK, Latimer County, OK, LeFlore County, OK, Lincoln County, OK, Mayes County, OK, McIntosh County, OK, Muskogee County, OK, Noble County, OK, Nowata County, OK, Okfuskee County, OK, Okmulgee County, OK, Osage County, OK, Ottawa County, OK, Pawnee County, OK, Payne County, OK, Pittsburg County, OK, Pottawatomie County, OK, Rogers County, OK, Seminole County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK

The radar

The Springfield radar (KSGF), 119 km from the middle of the area, began a volume at 00:49 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
50%
One or more EF2 to EF5 tornadoes
30%
Ten or more severe wind reports
40%
One or more gusts of 65 knots or more
10%
Ten or more severe hail reports
50%
One or more hailstones of 2 inches or more
40%
Six or more combined severe hail and wind reports
90%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Mar 6, 7:29 PM CSTSevere Thunderstorm WarningICTElk, Greenwood, Wilson, Woodson61 min
Mar 6, 8:00 PM CSTSevere Thunderstorm WarningICTChautauqua, Cowley, Elk, Montgomery, Wilson60 min
Mar 6, 8:12 PM CSTSevere Thunderstorm WarningTSAOsage48 min
Mar 6, 8:20 PM CSTTornado WarningICTChautauqua23 min
Mar 6, 8:29 PM CSTSevere Thunderstorm WarningSGFBourbon46 min
Mar 6, 8:31 PM CSTSevere Thunderstorm WarningTSAOsage, Pawnee44 min
Mar 6, 8:44 PM CSTSevere Thunderstorm WarningSGFBourbon, Crawford61 min
Mar 6, 8:45 PM CSTSevere Thunderstorm WarningICTAllen, Neosho, Wilson33 min
Mar 6, 8:49 PM CSTSevere Thunderstorm WarningICTLabette, Montgomery, Neosho56 min
Mar 6, 8:51 PM CSTSevere Thunderstorm WarningSGFVernon39 min
Mar 6, 8:51 PM CSTSevere Thunderstorm WarningTSANowata, Osage, Washington39 min
Mar 6, 8:52 PM CSTSevere Thunderstorm WarningOUNPayne38 min
Mar 6, 8:55 PM CSTSevere Thunderstorm WarningTSAWashington35 min
Mar 6, 8:57 PM CSTSevere Thunderstorm WarningICTChautauqua, Montgomery, Wilson8 min
Mar 6, 9:01 PM CSTSevere Thunderstorm WarningOUNLincoln44 min
Mar 6, 9:05 PM CSTSevere Thunderstorm WarningOUNLincoln, Oklahoma40 min
Mar 6, 9:07 PM CSTSevere Thunderstorm WarningSGFBarton, Vernon53 min
Mar 6, 9:09 PM CSTTornado WarningTSAWashington36 min
Mar 6, 9:11 PM CSTSevere Thunderstorm WarningTSACrawford, Washington49 min
Mar 6, 9:16 PM CSTSevere Thunderstorm WarningSGFCherokee, Crawford59 min
Mar 6, 9:19 PM CSTSevere Thunderstorm WarningSGFBenton, Hickory, St. Clair56 min
Mar 6, 9:19 PM CSTSevere Thunderstorm WarningTSACreek, Osage, Pawnee, Tulsa, Washington41 min
Mar 6, 9:21 PM CSTTornado WarningSGFCedar, St. Clair, Vernon24 min
Mar 6, 9:24 PM CSTSevere Thunderstorm WarningTSACraig, Mayes, Nowata, Osage, Ottawa, Rogers and 1 more66 min
Mar 6, 9:35 PM CSTSevere Thunderstorm WarningSGFCedar55 min
Mar 6, 9:39 PM CSTSevere Thunderstorm WarningOUNLincoln, Pottawatomie51 min
Mar 6, 9:40 PM CSTTornado WarningTSACrawford, Washington35 min
Mar 6, 9:40 PM CSTTornado WarningSGFSt. Clair19 min
Mar 6, 9:43 PM CSTSevere Thunderstorm WarningSGFMorgan62 min
Mar 6, 9:46 PM CSTSevere Thunderstorm WarningTSACreek, Mayes, Okfuskee, Okmulgee, Osage, Pawnee and 4 more59 min
Mar 6, 10:00 PM CSTSevere Thunderstorm WarningSGFCherokee60 min
Mar 6, 10:04 PM CSTSevere Thunderstorm WarningTSACrawford, Washington26 min
Mar 6, 10:08 PM CSTSevere Thunderstorm WarningTSACraig, Delaware, Mayes, Ottawa, Rogers67 min
Mar 6, 10:11 PM CSTSevere Thunderstorm WarningSGFBenton, Camden, Dallas, Hickory, Laclede, Miller and 2 more64 min
Mar 6, 10:14 PM CSTSevere Thunderstorm WarningSGFBarry, Lawrence, McDonald, Newton61 min
Mar 6, 10:19 PM CSTSevere Thunderstorm WarningSGFChristian, Dallas, Greene, Laclede, Lawrence, Polk and 1 more56 min
Mar 6, 10:20 PM CSTSevere Thunderstorm WarningOUNCleveland, Pottawatomie, Seminole40 min
Mar 6, 10:21 PM CSTTornado WarningTSACrawford, Washington24 min
Mar 6, 10:21 PM CSTSevere Thunderstorm WarningTSACherokee, Creek, Delaware, McIntosh, Mayes, Muskogee and 5 more54 min
Mar 6, 10:29 PM CSTTornado WarningSGFCamden, Miller, Morgan31 min
Mar 6, 10:41 PM CSTSevere Thunderstorm WarningSGFBarry, Christian, Lawrence, McDonald, Stone64 min
Mar 6, 10:45 PM CSTTornado WarningTSAMadison, Washington30 min
Mar 6, 10:49 PM CSTTornado WarningSGFDallas, Laclede41 min
Mar 6, 10:50 PM CSTTornado WarningSGFCamden, Miller, Pulaski40 min
Mar 6, 10:53 PM CSTSevere Thunderstorm WarningTSABenton, Washington67 min
Mar 6, 11:02 PM CSTSevere Thunderstorm WarningSGFChristian, Dallas, Douglas, Greene, Laclede, Pulaski and 3 more58 min
Mar 6, 11:08 PM CSTSevere Thunderstorm WarningTSAAdair, Cherokee, Haskell, McIntosh, Muskogee, Okfuskee and 4 more67 min
Mar 6, 11:09 PM CSTSevere Thunderstorm WarningSGFBarry, Christian, Douglas, Stone, Taney66 min
Mar 6, 11:12 PM CSTSevere Thunderstorm WarningSGFCamden, Laclede, Maries, Miller, Phelps, Pulaski63 min
Mar 6, 11:13 PM CSTSevere Thunderstorm WarningSGFOzark, Taney47 min
Mar 6, 11:14 PM CSTTornado WarningTSAMadison31 min
Mar 6, 11:24 PM CSTSevere Thunderstorm WarningTSABenton, Carroll, Madison, Washington66 min
Mar 6, 11:41 PM CSTTornado WarningSGFMaries, Phelps34 min
Mar 6, 11:43 PM CSTTornado WarningSGFDouglas, Howell, Ozark47 min
Mar 6, 11:44 PM CSTSevere Thunderstorm WarningTSACrawford61 min
Mar 6, 11:51 PM CSTSevere Thunderstorm WarningSGFChristian, Douglas, Ozark, Taney54 min
Mar 6, 11:58 PM CSTSevere Thunderstorm WarningSGFChristian, Laclede, Pulaski, Texas, Webster, Wright62 min
Mar 7, 12:12 AM CSTSevere Thunderstorm WarningSGFDent63 min
Mar 7, 12:19 AM CSTTornado WarningSGFHowell41 min
Mar 7, 12:28 AM CSTSevere Thunderstorm WarningTSACarroll, Crawford, Franklin, Madison, Sebastian, Washington47 min
Mar 7, 12:34 AM CSTSevere Thunderstorm WarningSGFDouglas, Howell, Ozark, Taney56 min
Mar 7, 12:41 AM CSTTornado WarningSGFOregon, Shannon49 min
Mar 7, 12:51 AM CSTSevere Thunderstorm WarningTSASebastian39 min
Mar 7, 1:11 AM CSTSevere Thunderstorm WarningTSACrawford, Franklin, Madison, Sebastian49 min
Mar 7, 1:28 AM CSTSevere Thunderstorm WarningTSASebastian47 min
Mar 7, 2:14 AM CSTSevere Thunderstorm WarningSGFOregon13 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 00:00Z, 0.9 hours before the alert went out and 90 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 00:00Z on 2017-03-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 629 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 00:00Z on 2017-03-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 319 square meters per square second.1939587897117Sfc1 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
629 J/kg
Mixed-layer CIN
-16 J/kg
Mixed-layer LCL
1110 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
319 m²/s²
0-3 km storm-relative helicity
542 m²/s²
Significant tornado parameter
1.7
Supercell composite
8.2

Open this sounding in Storm Lab

The text

As transmitted.

512 
WWUS20 KWNS 070049
SEL4  
SPC WW 070049
ARZ000-KSZ000-MOZ000-OKZ000-070900-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 64
NWS Storm Prediction Center Norman OK
650 PM CST Mon Mar 6 2017

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Western Arkansas
  Southeast Kansas
  Southern Missouri
  Eastern Oklahoma

* Effective this Monday night and Tuesday morning from 650 PM
  until 300 AM CST.

* Primary threats include...
  A few tornadoes and a couple intense tornadoes possible
  Scattered large hail and isolated very large hail events to 2.5
    inches in diameter possible
  Scattered damaging wind gusts to 70 mph possible

SUMMARY...Strong to severe thunderstorms will continue to develop
along a cold front as it overtakes a dryline across south-central
Kansas and west-central Oklahoma. Additional more isolated supercell
storms may also develop ahead of the front this evening as low-level
moisture continues to increase across the region. Large hail,
damaging winds, and tornadoes will all be possible.

The tornado watch area is approximately along and 70 statute miles
north and south of a line from 45 miles west of Bartlesville OK to
40 miles southeast of Fort Leonard Wood MO. For a complete depiction
of the watch see the associated watch outline update (WOUS64 KWNS
WOU4).

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 61...WW 62...WW 63...

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 2.5 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 24035.

...Guyer

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 6, 6:02 PM CSTMesoscale DiscussionSPCBenton, Boone, Carroll, Crawford, Franklin, Madison and 2 more58 min
Mar 6, 8:10 PM CSTMesoscale DiscussionSPCBaxter, Boone, Carroll, Clay, Cleburne, Conway and 27 more3 hr
Mar 6, 9:16 PM CSTMesoscale DiscussionSPCBenton, Boone, Carroll, Crawford, Franklin, Madison and 3 more119 min
Mar 6, 9:21 PM CSTTornado WatchSPCBaxter, Boone, Clay, Cleburne, Conway, Craighead and 31 more8 hr
Mar 7, 2:58 AM CSTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 47 more92 min
Mar 7, 3:37 AM CSTSevere Thunderstorm WatchSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 25 more8 hr
Mar 7, 8:03 AM CSTMesoscale DiscussionSPCAshley, Chicot, Desha, Drew, Union117 min
Mar 6, 6:31 PM CSTMesoscale DiscussionSPCAnderson, Atchison, Coffey, Doniphan, Douglas, Franklin and 9 more119 min
Mar 6, 7:19 PM CSTMesoscale DiscussionSPCJohnson, Miami, Wyandotte116 min
Mar 6, 8:22 PM CSTMesoscale DiscussionSPCAudrain, Boone, Callaway, Clark, Cole, Crawford and 19 more2 hr
Mar 6, 8:52 PM CSTTornado WatchSPCAudrain, Boone, Callaway, Clark, Cole, Crawford and 25 more6 hr
Mar 6, 11:13 PM CSTMesoscale DiscussionSPCBollinger, Butler, Cape Girardeau, Carter, Christian, Crawford and 38 more2 hr

Nearby

Tornado Watches in Missouri, 2017Tornado Watches in Oklahoma, 2017Tornado Watches in Kansas, 2017Every tornado watch 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.