Alert archive / Missouri / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 87, NWS Springfield, MO

May 19, 2018St. Clair County, Missouri

NWS Springfield, MO issued this severe thunderstorm warning at May 19, 2018, 4:46 PM CDT for St. Clair County, Missouri. It was in force for 44 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: May 19, 2018, 4:46 PM CDT (21:46 UTC)
Expired: May 19, 2018, 5:30 PM CDT
In force: 44 min
Issued by: NWS Springfield, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County St. Clair County, MO

The radar

The Pleasant Hill radar (KEAX), 87 km from the middle of the area, began a volume at 21:47 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
May 19, 5:00 PM CDT	TSTM WND DMG	5 W Lowry City, MO	SEVERAL LARGE LIMBS OF 3 TO 4 INCHES IN DIAMETER WERE BLOWN DOWN FROM HARDWOOD TREES. DELAYED REPORT, TIME ESTIMATED BY RADAR.

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 14 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 19, 2:30 PM CDT	Severe Thunderstorm Watch	SPC	11 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 9.8 hours before the alert went out and 143 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: 1840 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 1017 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

As transmitted.

361 
WUUS53 KSGF 192146
SVRSGF
MOC185-192230-
/O.NEW.KSGF.SV.W.0087.180519T2146Z-180519T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Springfield MO
446 PM CDT SAT MAY 19 2018

The National Weather Service in Springfield has issued a

* Severe Thunderstorm Warning for...
  Northern St. Clair County in west central Missouri...

* Until 530 PM CDT

* At 446 PM CDT, a severe thunderstorm was located near Schell City,
  or 13 miles east of Rich Hill, 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. 

* Locations impacted include...
  Truman Lake...                    Appleton City...
  Lowry City...                     Johnson City...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Remember, lightning can strike out to 15 miles from the parent 
thunderstorm. If you can hear thunder, you are close enough to be 
struck by lightning. Move to safe shelter now!  Do not be caught on 
the water in a thunderstorm.

&&

LAT...LON 3821 9354 3821 9351 3819 9354 3802 9406
      3821 9405 3820 9356 3822 9357
TIME...MOT...LOC 2146Z 242DEG 27KT 3811 9412 

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

Hatch

1 follow-up statement

395 
WWUS53 KSGF 192221
SVSSGF

Severe Weather Statement
National Weather Service Springfield MO
521 PM CDT SAT MAY 19 2018

MOC185-192231-
/O.EXP.KSGF.SV.W.0087.000000T0000Z-180519T2230Z/
St. Clair MO-
521 PM CDT SAT MAY 19 2018

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN ST. CLAIR COUNTY WILL
EXPIRE AT 530 PM CDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

A severe thunderstorm watch remains in effect until 1000 PM CDT for
west central Missouri.

LAT...LON 3821 9354 3821 9351 3819 9354 3802 9406
      3821 9405 3820 9356 3822 9357
TIME...MOT...LOC 2221Z 242DEG 27KT 3823 9383 

$$

Hatch

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 Springfield, MO wrote its last area forecast discussion before this severe thunderstorm warning went out at May 19, 3:03 PM CDT, 1 hour 43 minutes earlier.

Area forecast discussion, May 19, 3:03 PM CDT, 1 hour 43 minutes before

Area Forecast Discussion
National Weather Service Springfield MO
303 PM CDT Sat May 19 2018

.SHORT TERM...(This evening through Sunday)
Issued at 227 PM CDT Sat May 19 2018

Strong to severe convection continues in the eastern CWA
primarily along and north of a surface warm front and ahead of a
subtle H5 wave currently moving through the area. Meanwhile...boundary
interactions with the surface front is setting off another round
of convection over north central Oklahoma.

As the larger upper level wave moves out of eastern Colorado
toward the Upper Mississippi Valley...low pressure will develop
and move along the front. This will induce more convection along
the front that will move up and into the area during the overnight
hours. Primary threat with these storms will be wind and
hail...but an isolated tornado cannot be ruled out especially over
extreme southeast Kansas. This convection will continue into
early Sunday.

.LONG TERM...(Sunday Night through Saturday)
Issued at 227 PM CDT Sat May 19 2018

The quasi-stationary surface front meanders back and forth across
central Missouri through most of the week. This will keep slight
chance to chance PoPs in the forecast. In the upper levels..a
trough is situated over the southwestern US with a ridge over the
Central States. As small short waves move out of the southwest
trough and up and over the ridge...rain chances over the area
will increase.

Not too much variability in day-to-day temperatures with highs
generally in the low to mid 80s and lows in the low to mid
60s...or about 5-10 degrees above normal.

&&

.AVIATION...(For the 18Z TAFS through 18Z Sunday afternoon)
Issued at 1246 PM CDT Sat May 19 2018

Convection ongoing ahead of a warm front currently situated along
the MO-AR border into northeast OK. Isolated to widely scattered
convection will occur across the area just ahead of the front this
afternoon.

Convection will once again be possible during the overnight
hours...but will be widely scattered in nature once again.
Conditions will be VFR outside of convective areas to MFVR for
ceilings and visibilities within the stronger storms.

&&

.SGF WATCHES/WARNINGS/ADVISORIES...
MO...NONE.
KS...NONE.
&&

SHORT TERM...Gaede
LONG TERM...Gaede
AVIATION...Gaede

Hazardous weather outlook, May 19, 3:17 PM CDT, 1 hour 29 minutes before

Hazardous Weather Outlook
National Weather Service Springfield MO
317 PM CDT Sat May 19 2018

KSZ073-097-101-MOZ055>058-066>071-077>083-088>098-101>106-202030-
Bourbon-Crawford-Cherokee-Benton-Morgan-Miller-Maries-Vernon-
St. Clair-Hickory-Camden-Pulaski-Phelps-Barton-Cedar-Polk-Dallas-
Laclede-Texas-Dent-Jasper-Dade-Greene-Webster-Wright-Newton-
Lawrence-Christian-Douglas-Howell-Shannon-McDonald-Barry-Stone-
Taney-Ozark-Oregon-
317 PM CDT Sat May 19 2018

This Hazardous Weather Outlook is for portions of the Missouri
Ozarks and extreme southeast Kansas.

.DAY ONE...This Afternoon and Tonight.

Weather hazards expected...

  Limited tornado risk.
  Elevated hail risk.
  Elevated thunderstorm wind damage risk.
  Limited flooding risk.
  Significant lightning risk.

DISCUSSION...

  A line of strong to severe storms will continue to track east
  across far south central Missouri late this afternoon. The
  strongest storms will be capable of producing hail to the size
  of ping pong balls and damaging winds gusts over 60 mph. This
  activity will spread east of the area by early this evening.

  Thunderstorms are currently developing across north central
  Oklahoma this afternoon. This activity will track northeast
  towards extreme southeastern Kansas and far western Missouri
  this evening. Hail to the size of golf balls and damaging wind
  gusts will be the main risk. An isolated tornado may also be
  possible. Frequent cloud to ground lightning strikes and
  locally heavy rainfall will also occur with this activity.

  Additional showers and storms may then develop and spread into
  the area from the west later tonight into early Sunday morning.
  Cloud to ground lightning and locally heavy rainfall will be
  the main risk, but a few of the stronger storms could be
  capable of penny size hail and winds in excess of 45 mph.

  With the multiple rounds of storms possible today and tonight,
  there will also be the potential for localized minor flooding.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

  Additional thunderstorm are possible on Sunday. A few storms
  may become severe across central Missouri if enough instability
  develops.

Additional thunderstorm chances will occur next week.

.SPOTTER INFORMATION STATEMENT...

  Spotter activation may be needed this afternoon across south
  central Missouri, then this evening across extreme southeastern
  Kansas and western Missouri.

&&

More detailed information can be accessed at:
http://www.weather.gov/sgf/sitrep

This product in graphical format...along with other weather...
hydrological and climate information...at
http://www.weather.gov/sgf

Wise

In the hours before

Local storm report, May 19, 3:02 PM CDT, 1 hour 44 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
302 PM CDT SAT MAY 19 2018

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

0245 PM     HAIL             2 N DORA                36.80N 92.22W
05/19/2018  E1.00 INCH       DOUGLAS            MO   FIRE DEPT/RESCUE

            CORRECTS PREVIOUS HAIL REPORT FROM 2 N DORA.

&&

FEH

Local storm report, May 19, 3:10 PM CDT, 1 hour 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
310 PM CDT SAT MAY 19 2018

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

0310 PM     HAIL             2 NE SILOAM SPRINGS     36.81N 92.05W
05/19/2018  E1.00 INCH       HOWELL             MO   EMERGENCY MNGR

&&

FEH

Local storm report, May 19, 3:16 PM CDT, 1 hour 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
316 PM CDT SAT MAY 19 2018

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

0315 PM     HAIL             4 ESE SILOAM SPRINGS    36.78N 92.01W
05/19/2018  E1.25 INCH       HOWELL             MO   EMERGENCY MNGR

&&

FEH

Local storm report, May 19, 3:23 PM CDT, 1 hour 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
323 PM CDT SAT MAY 19 2018

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

0250 PM     TSTM WND DMG     SALEM                   37.64N 91.54W
05/19/2018                   DENT               MO   LAW ENFORCEMENT

            POWER POLE WAS SNAPPED AND LINES DOWN ON THE
            WEST SIDE OF TOWN.

&&

FEH

Local storm report, May 19, 3:35 PM CDT, 1 hour 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
335 PM CDT SAT MAY 19 2018

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

0335 PM     HAIL             2 NW WEST PLAINS        36.75N 91.88W
05/19/2018  E0.75 INCH       HOWELL             MO   EMERGENCY MNGR

&&

FEH

Local storm report, May 19, 4:00 PM CDT, 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
400 PM CDT SAT MAY 19 2018

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

0315 PM     LIGHTNING        1 N MOUNTAIN VIEW       37.00N 91.70W
05/19/2018                   HOWELL             MO   LAW ENFORCEMENT

            LIGHTNING STRUCK A TREE WHICH THEN FELL ON
            POWER LINES. POWER WAS REPORTED OUT TO A FEW
            HOMES.

&&

FEH

The office that day

Everything else NWS Springfield, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 19, 3:42 AM CDT	Dense Fog Advisory	SGF	Maries, Miller, Morgan, Phelps	5 hr
May 19, 7:00 AM CDT	Special Weather Statement	SGF	Vernon	30 min
May 19, 7:26 AM CDT	Severe Thunderstorm Warning	SGF	Cedar, Polk	49 min
May 19, 7:46 AM CDT	Severe Thunderstorm Warning	SGF	Dallas, Polk	44 min
May 19, 7:48 AM CDT	Severe Thunderstorm Warning	SGF	St. Clair	42 min
May 19, 8:34 AM CDT	Special Weather Statement	SGF	Laclede	41 min
May 19, 9:01 AM CDT	Severe Thunderstorm Warning	SGF	Laclede, Wright	59 min
May 19, 9:51 AM CDT	Severe Thunderstorm Warning	SGF	Barton	54 min
May 19, 9:55 AM CDT	Severe Thunderstorm Warning	SGF	Texas, Wright	65 min
May 19, 10:45 AM CDT	Severe Thunderstorm Warning	SGF	Barton, Cedar, Dade, Jasper	60 min
May 19, 11:12 AM CDT	Severe Thunderstorm Warning	SGF	Howell, Shannon, Texas	63 min
May 19, 11:33 AM CDT	Special Weather Statement	SGF	Benton, Camden, Dallas, Hickory, Morgan, Polk	42 min
May 19, 11:50 AM CDT	Severe Thunderstorm Warning	SGF	Polk	40 min
May 19, 12:25 PM CDT	Severe Thunderstorm Warning	SGF	Camden, Maries, Miller, Pulaski	65 min
May 19, 12:33 PM CDT	Special Weather Statement	SGF	Dallas, Greene, Laclede, Pulaski, Webster	42 min
May 19, 12:34 PM CDT	Special Weather Statement	SGF	Oregon	41 min
May 19, 12:42 PM CDT	Severe Thunderstorm Warning	SGF	Greene, Webster	63 min
May 19, 12:57 PM CDT	Severe Thunderstorm Warning	SGF	Christian, Douglas, Greene, Webster	63 min
May 19, 12:58 PM CDT	Severe Thunderstorm Warning	SGF	Oregon, Shannon	36 min
May 19, 1:02 PM CDT	Severe Thunderstorm Warning	SGF	Maries, Phelps	58 min
May 19, 1:33 PM CDT	Severe Thunderstorm Warning	SGF	Douglas, Wright	57 min
May 19, 1:44 PM CDT	Severe Thunderstorm Warning	SGF	Douglas, Ozark	61 min
May 19, 2:07 PM CDT	Severe Thunderstorm Warning	SGF	Dent, Texas	53 min
May 19, 2:24 PM CDT	Severe Thunderstorm Warning	SGF	Shannon, Texas	66 min
May 19, 2:40 PM CDT	Severe Thunderstorm Warning	SGF	Douglas, Howell, Ozark	65 min
May 19, 3:16 PM CDT	Severe Thunderstorm Warning	SGF	Shannon	32 min
May 19, 3:47 PM CDT	Severe Thunderstorm Warning	SGF	Howell, Oregon	32 min
May 19, 4:39 PM CDT	Severe Thunderstorm Warning	SGF	Barton, Jasper	51 min
May 19, 4:48 PM CDT	Severe Thunderstorm Warning	SGF	Barton, Vernon	42 min
May 19, 5:14 PM CDT	Tornado Warning	SGF	Barton, Vernon	31 min
May 19, 5:20 PM CDT	Severe Thunderstorm Warning	SGF	Barton, Cedar, Dade, Jasper, Vernon	40 min
May 19, 5:27 PM CDT	Severe Thunderstorm Warning	SGF	Jasper, Lawrence, Newton	35 min
May 19, 5:48 PM CDT	Severe Thunderstorm Warning	SGF	Benton, Camden, Morgan	57 min
May 19, 5:55 PM CDT	Severe Thunderstorm Warning	SGF	Cedar, St. Clair	37 min
May 19, 6:00 PM CDT	Special Weather Statement	SGF	Dade, Dallas, Greene, Hickory, Polk	45 min
May 19, 6:23 PM CDT	Severe Thunderstorm Warning	SGF	Dallas, Polk	33 min
May 19, 6:51 PM CDT	Special Weather Statement	SGF	Benton, Camden, Dallas, Laclede, Miller, Morgan and 1 more	39 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2018 Every severe thunderstorm warning in 2018

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.