Alert archive / Missouri / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 61, NWS Springfield, MO

April 20, 2020Douglas County, Howell County, Missouri

NWS Springfield, MO issued this severe thunderstorm warning at Apr 20, 2020, 6:41 PM CDT for Douglas County, Howell County, Missouri. It was in force for 28 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: Apr 20, 2020, 6:41 PM CDT (23:41 UTC)
Expired: Apr 20, 2020, 7:09 PM CDT
In force: 28 min
Issued by: NWS Springfield, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Douglas County, MO, Howell County, MO

The radar

The Springfield radar (KSGF), 132 km from the middle of the area, began a volume at 23:41 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
Apr 20, 6:55 PM CDT	HAIL 0.7	3 Ssw Willow Springs, MO

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

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

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

Springfield, MO (KSGF), launched 12:00Z, 11.7 hours before the alert went out and 163 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: 1600 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 58 m²/s²
0-3 km storm-relative helicity: 79 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

279 
WUUS53 KSGF 202341
SVRSGF
MOC067-091-210030-
/O.NEW.KSGF.SV.W.0061.200420T2341Z-200421T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Springfield MO
641 PM CDT Mon Apr 20 2020

The National Weather Service in Springfield has issued a

* Severe Thunderstorm Warning for...
  East central Douglas County in southwestern Missouri...
  Northern Howell County in south central Missouri...

* Until 730 PM CDT.

* At 641 PM CDT, a severe thunderstorm was located near Willow
  Springs, moving southeast at 40 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...
  Mountain View...                  Willow Springs...
  Pomona...                         Peace Valley...
  White Church...                   

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3691 9219 3705 9212 3705 9166 3673 9168
TIME...MOT...LOC 2341Z 296DEG 36KT 3696 9207 

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

Wise

2 follow-up statements

476 
WWUS53 KSGF 202347
SVSSGF

Severe Weather Statement
National Weather Service Springfield MO
647 PM CDT Mon Apr 20 2020

MOC067-202357-
/O.CAN.KSGF.SV.W.0061.000000T0000Z-200421T0030Z/
Douglas MO-
647 PM CDT Mon Apr 20 2020

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL DOUGLAS COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3673 9168 3688 9210 3704 9209 3705 9209
      3705 9166
TIME...MOT...LOC 2347Z 296DEG 33KT 3694 9201 

$$

MOC091-210030-
/O.CON.KSGF.SV.W.0061.000000T0000Z-200421T0030Z/
Howell MO-
647 PM CDT Mon Apr 20 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM CDT
FOR NORTHERN HOWELL COUNTY...

At 647 PM CDT, a severe thunderstorm was located near Willow Springs,
moving southeast at 40 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...
Mountain View...                  Willow Springs...
Pomona...                         Peace Valley...
White Church...                   

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3673 9168 3688 9210 3704 9209 3705 9209
      3705 9166
TIME...MOT...LOC 2347Z 296DEG 33KT 3694 9201 

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

Wise

567 
WWUS53 KSGF 210009
SVSSGF

Severe Weather Statement
National Weather Service Springfield MO
709 PM CDT Mon Apr 20 2020

MOC091-210019-
/O.CAN.KSGF.SV.W.0061.000000T0000Z-200421T0030Z/
Howell MO-
709 PM CDT Mon Apr 20 2020

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN HOWELL COUNTY IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.

LAT...LON 3673 9168 3688 9210 3704 9209 3705 9209
      3705 9166
TIME...MOT...LOC 0008Z 296DEG 36KT 3684 9176 

$$

Wise

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 Apr 20, 3:06 PM CDT, 3 hours 35 minutes earlier.

Area forecast discussion, Apr 20, 3:06 PM CDT, 3 hours 35 minutes before

Area Forecast Discussion
National Weather Service Springfield MO
306 PM CDT Mon Apr 20 2020

.SHORT TERM...(This evening through Tuesday)
Issued at 219 PM CDT Mon Apr 20 2020

Scattered to numerous showers and thunderstorms will continue into
early this evening as a short wave trough and associated surface
cold front continue to push southeast across the region. MLCAPE
values in the 800-1100 J/kg range in conjunction with steep mid-
level lapse rates and 40 knots of deep layer shear will support
some quarter-size hail potential.

Short-term models and soundings are also indicating nearly dry
adiabatic low-levels beneath relatively high LCLs. This will be
supportive of some damaging wind gust potential, especially where
cold pool conglomeration occurs with clusters and line segments.

This activity will then begin to wane across south-central
Missouri in the 2-3Z time frame with the loss of daytime heating.
The rest of tonight then looks fairly quiet. There could again be
some fog late tonight primarily across southwest Missouri. We went
close to the model blend for lows tonight with most areas falling
into the middle or upper 40s.

Tuesday then looks pleasant as surface high pressure slides
southeast along the Mid-Mississippi River Valley. We have gone
slightly above the model blend for highs with most areas ranging
from the upper 60s to lower 70s.

.LONG TERM...(Tuesday Night through Monday)
Issued at 219 PM CDT Mon Apr 20 2020

The next storm system will then take shape starting Tuesday night
as strong upper level energy ejects into the southern high Plains.
We should see a large area of showers and thunderstorms overspread
the Missouri Ozarks and southeastern Kansas from late Tuesday
night into Wednesday morning as a low-level jet veers into the
region beneath the left-exit region of an upper level jet streak.

Showers and thunderstorms are then expected to persist for much of
Wednesday and Wednesday evening as that upper level energy tracks
through the central and southern Plains and into the Mid-
Mississippi Valley. Locally heavy rainfall is a concern given high
moisture availability, deep tropospheric ascent and convective
elements. The good news here is that we can take a bit of rainfall
given the recent green-up.

At this time, the severe potential mainly looks like it will be
south of the Missouri Ozarks with perhaps the exception of far
southern Missouri. The track of the surface low and amount of
destabilization that can occur will dictate the eventual severe
threat.

Global models then indicate yet another system impacting the
region as we get into the late Thursday night and Friday time
frame. Model consistency has become a bit better with this
system, thus PoPs have been nudged up into the likely range.

Temperatures from midweek through next Monday will be near or
slightly below normal. We still see no frost/freeze potential over
the next seven days.

&&

.AVIATION...(For the 18Z TAFS through 18Z Tuesday afternoon)
Issued at 1213 PM CDT Mon Apr 20 2020

Scattered thunderstorms are expected into this evening as a cold
front moves southeast through the region. Brief MVFR conditions
can be expected with storms along with gusty and erratic winds.

VFR conditions are then primarily expected from mid-evening
through Tuesday morning. There is some potential for fog
development across far southwestern Missouri. We are thinking this
will not affect the TAF sites at this time.

&&

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

SHORT TERM...Schaumann
LONG TERM...Schaumann
AVIATION...Schaumann

Hazardous weather outlook, Apr 20, 12:39 PM CDT, 6 hours 2 minutes before

Hazardous Weather Outlook
National Weather Service Springfield MO
1239 PM CDT Mon Apr 20 2020

KSZ073-097-101-MOZ055>058-066>071-077>083-088>098-101>106-211745-
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-
1239 PM CDT Mon Apr 20 2020

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 hail risk.
  Limited thunderstorm wind damage risk.
  Limited lightning risk.

DISCUSSION...

 Scattered showers and thunderstorms are expected this afternoon
 and early evening. A few of these storms may become strong to
 severe and produce hail up to the size of quarters and localized
 wind gusts up to 60 mph. Cloud to ground lightning will also be
 a potential hazard.

 Non-thunderstorm wind gusts up to 30 mph are expected this
 afternoon, mainly across western Missouri and southeastern
 Kansas.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

 Additional thunderstorms will be possible from late Tuesday
 night into early Thursday and again towards next weekend as a
 pair of storm systems track across the region. Locally heavy
 rainfall will be possible.

.SPOTTER INFORMATION STATEMENT...

  Spotter activation may be needed into early this evening
  across most of the outlook area.

&&

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

Schaumann

In the hours before

Special weather statement, Apr 20, 6:03 PM CDT, 38 minutes before

Special Weather Statement
National Weather Service Springfield MO
603 PM CDT Mon Apr 20 2020

MOZ092-096-202330-
Douglas MO-Wright MO-
603 PM CDT Mon Apr 20 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN DOUGLAS AND
SOUTHEASTERN WRIGHT COUNTIES UNTIL 630 PM CDT...

At 603 PM CDT, Doppler radar was tracking a strong thunderstorm near
Mansfield, or 13 miles west of Mountain Grove, moving east at 35 mph.

Penny size hail and wind gusts up to 50 mph will be possible with
this storm.

Locations impacted include...
Mountain Grove...                 Mansfield...
Norwood...                        Drury...
Vanzant...

LAT...LON 3706 9258 3718 9255 3715 9225 3689 9226
TIME...MOT...LOC 2303Z 288DEG 29KT 3712 9251

Wise

Local storm report, Apr 20, 6:12 PM CDT, 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
612 PM CDT MON APR 20 2020

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

0558 PM     HAIL             1 NE REPUBLIC           37.13N 93.47W
04/20/2020  M0.75 INCH       GREENE             MO   PUBLIC

            REPORT FROM MPING: DIME (0.75 IN.).

&&

Local storm report, Apr 20, 6:13 PM CDT, 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
613 PM CDT MON APR 20 2020

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

0553 PM     HAIL             1 SE REPUBLIC           37.11N 93.47W
04/20/2020  M0.75 INCH       GREENE             MO   PUBLIC

            REPORT FROM MPING: DIME (0.75 IN.).

&&

Local storm report, Apr 20, 6:14 PM CDT, 27 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
614 PM CDT MON APR 20 2020

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

0609 PM     HAIL             6 NE HIWASSE            36.51N 94.28W
04/20/2020  E0.50 INCH       MCDONALD           MO   PUBLIC

            REPORT FROM MPING: HALF-INCH (0.50 IN.).

&&

Local storm report, Apr 20, 6:16 PM CDT, 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
616 PM CDT MON APR 20 2020

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

0605 PM     HAIL             1 NNW NIXA              37.06N 93.30W
04/20/2020  E0.70 INCH       CHRISTIAN          MO   PUBLIC

            DIME SIZE HAIL NEAR WALMART IN NIXA.

&&

Special weather statement, Apr 20, 6:23 PM CDT, 18 minutes before

Special Weather Statement
National Weather Service Springfield MO
623 PM CDT Mon Apr 20 2020

MOZ082-096-097-210030-
Douglas MO-Howell MO-Texas MO-
623 PM CDT Mon Apr 20 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN DOUGLAS...NORTHERN
HOWELL AND SOUTHERN TEXAS COUNTIES UNTIL 730 PM CDT...

At 623 PM CDT, Doppler radar was tracking a strong thunderstorm near
Mountain Grove, moving east at 35 mph.

Nickel size hail will be possible with this storm.

Locations impacted include...
Mountain View...                  Willow Springs...
Cabool...                         Peace Valley...
Clear Springs...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3693 9210 3699 9225 3713 9225 3710 9166
      3684 9166
TIME...MOT...LOC 2323Z 276DEG 30KT 3705 9228

Wise

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 20, 1:40 AM CDT	Dense Fog Advisory	SGF	Christian, Douglas, Howell, Ozark, Stone, Taney	8 hr
Apr 20, 2:40 PM CDT	Special Weather Statement	SGF	Wright	50 min
Apr 20, 3:40 PM CDT	Special Weather Statement	SGF	Howell	65 min
Apr 20, 3:50 PM CDT	Severe Thunderstorm Warning	SGF	Douglas, Howell	40 min
Apr 20, 4:24 PM CDT	Severe Thunderstorm Warning	SGF	Howell, Oregon	50 min
Apr 20, 4:34 PM CDT	Special Weather Statement	SGF	Lawrence	41 min
Apr 20, 4:43 PM CDT	Special Weather Statement	SGF	McDonald	47 min
Apr 20, 4:56 PM CDT	Special Weather Statement	SGF	Newton	49 min
Apr 20, 4:58 PM CDT	Severe Thunderstorm Warning	SGF	McDonald	62 min
Apr 20, 5:23 PM CDT	Special Weather Statement	SGF	Christian	52 min
Apr 20, 5:52 PM CDT	Special Weather Statement	SGF	Christian	38 min
Apr 20, 6:03 PM CDT	Special Weather Statement	SGF	Douglas	27 min
Apr 20, 6:10 PM CDT	Severe Thunderstorm Warning	SGF	Laclede, Pulaski, Texas	33 min
Apr 20, 6:23 PM CDT	Special Weather Statement	SGF	Howell	67 min
Apr 20, 6:39 PM CDT	Severe Thunderstorm Warning	SGF	Dent, Phelps, Texas	18 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2020 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.