Strong to severe thunderstorms developed over central and west central Missouri during the afternoon and early evening along an outflow boundary from early morning storms over northern Missouri. One storm in Phelps County produced wind gusts strong enough to blow shingles off a home in Newburg.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS SGF wrote it up.
Strong to severe thunderstorms developed over central and west central Missouri during the afternoon and early evening along an outflow boundary from early morning storms over northern Missouri. One storm in Phelps County produced wind gusts strong enough to blow shingles off a home in Newburg. Rainfall accumulations over two inches inches occurred over Maries and Pulaski counties.
The local office's own words before the first event, 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 the first event at Jun 27, 1:55 PM CST, 3 hours 20 minutes earlier.
Area Forecast Discussion National Weather Service Springfield MO 255 PM CDT Sat Jun 27 2020 .SHORT TERM...(This evening through Sunday) Issued at 245 PM CDT Sat Jun 27 2020 The radar is fairly quiet across the region as of 245 PM with a significant amount of cloudiness remaining after a cluster of thunderstorms decayed across western and central Missouri this morning. The clouds have held temperatures down somewhat with most areas in the lower to middle 80s. As we head into the late afternoon and early evening hours, redevelopment of scattered thunderstorms remains possible, especially across central Missouri. Short term objective analysis reveals a low-level jet nosing into this region as a MCV continues to track east across northern Missouri. Additionally, low-level wind fields are resulting in broad convergence across this region. If pockets of sunshine develop, the atmosphere should become fairly uncapped. There would be a low-end risk for a few strong to severe storms across central Missouri given moderate amounts of instability and deep layer effective bulk shear around 30 knots. We will also have to watch for training thunderstorms as PWATs across central Missouri are up over 1.75". The main thunderstorm threat should begin to shift north of the region later tonight. The one exception would be if evening convection establishes a near-surface cold pool which continues to interact with that low-level jet. Low temperatures tonight look rather warm with most areas only falling into the lower to middle 70s. An upper level short wave ridge and height rises should then result in a dry day over the area on Sunday. Temperatures look hot as 850 mb temperatures warm into the 18-20 Celsius range. This should result in high temperatures in the 89-93 range. With dew points in the upper 60s to lower 70s, heat indices will range from the middle 90s to near 100 degrees. .LONG TERM...(Sunday Night through Saturday) Issued at 220 PM CDT Sat Jun 27 2020 An upper level ridge will poke up along the Mississippi River Valley region starting early next week, with global models and ensembles indicating that this ridge may persist for much of the week. There may be some retrogression as we get towards next weekend. With a weak southwest flow aloft expected over the Ozarks, pop-up showers and thunderstorms look like a good bet on a daily basis for most of the week. Temperatures near or slightly above normal are expected for most of the week with those dew points also remaining rather steamy. We will have to watch heat indices, especially as we get towards midweek as there are increasing indications that some locations around the I-49 corridor may approach Heat Advisory criteria. && .AVIATION...(For the 18Z TAFS through 18Z Sunday afternoon) Issued at 1203 PM CDT Sat Jun 27 2020 Some pockets of MVFR ceilings and visibility will remain through early afternoon. Otherwise, VFR conditions are expected from mid- afternoon through Sunday morning. Surface winds will remain brisk and gusty from the south to southwest, especially during the daylight hours. Low-level wind shear conditions are expected from later tonight into early Sunday morning. && .SGF WATCHES/WARNINGS/ADVISORIES... MO...NONE. KS...NONE. && SHORT TERM...Schaumann LONG TERM...Schaumann AVIATION...Schaumann
Hazardous Weather Outlook National Weather Service Springfield MO 359 PM CDT Sat Jun 27 2020 KSZ073-097-101-MOZ055>058-066>071-077>083-088>098-101>106-282100- 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- 359 PM CDT Sat Jun 27 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 flooding risk. Limited lightning risk. Limited excessive heat risk. Limited non thunderstorm wind risk. DISCUSSION... Afternoon heat index values over southeast Kansas and parts of western Missouri will rise into the low to mid 90s. Non-thunderstorm wind gusts around 30 mph will continue into early this evening across western Missouri and southeastern Kansas. Scattered thunderstorms will be possible into this evening. A few strong to severe storms will be possible, mainly north of the Highway 60 corridor. Wind gusts of 50 to 60 mph and hail up to the size of quarters would be the primary potential severe weather hazards. Frequent lightning and localized flash flooding will also be possible. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Scattered thunderstorms will be possible from Monday through Friday of next week. Heat index values from the mid to upper 90s are expected on a daily basis, with values over 100 degrees possible by the middle of next week near the I-49 corridor. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed through tonight. && 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
Special Weather Statement
National Weather Service Springfield MO
434 PM CDT Sat Jun 27 2020
MOZ058-272215-
Maries MO-
434 PM CDT Sat Jun 27 2020
...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN MARIES COUNTY UNTIL
515 PM CDT...
At 434 PM CDT, Doppler radar was tracking a strong thunderstorm over
Vienna, or 18 miles northwest of Rolla, moving east at 30 mph.
Penny size hail and wind gusts up to 50 mph will be possible with
this storm.
Locations impacted include...
Vienna... Vichy...
LAT...LON 3816 9164 3815 9163 3805 9163 3805 9165
3813 9204 3824 9204 3827 9164
TIME...MOT...LOC 2134Z 272DEG 25KT 3818 9196
TitusSpecial Weather Statement
National Weather Service Springfield MO
522 PM CDT Sat Jun 27 2020
MOZ081-272300-
Laclede MO-
522 PM CDT Sat Jun 27 2020
...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL LACLEDE COUNTY UNTIL
600 PM CDT...
At 522 PM CDT, Doppler radar was tracking a strong thunderstorm near
Lebanon, moving east at 25 mph.
Half inch hail and wind gusts up to 50 mph will be possible with this
storm.
Locations impacted include...
Lebanon... Dry Knob...
Falcon...
This includes Interstate 44 between mile markers 130 and 132.
LAT...LON 3772 9241 3771 9240 3764 9225 3756 9225
3769 9264 3772 9263 3774 9241
TIME...MOT...LOC 2222Z 269DEG 22KT 3770 9258
TitusSpecial Weather Statement
National Weather Service Springfield MO
603 PM CDT Sat Jun 27 2020
MOZ058-071-272345-
Maries MO-Phelps MO-
603 PM CDT Sat Jun 27 2020
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN MARIES AND PHELPS
COUNTIES UNTIL 645 PM CDT...
At 603 PM CDT, Doppler radar was tracking a strong thunderstorm near
Newburg, or 10 miles west of Rolla, moving east at 25 mph.
Nickel size hail and wind gusts up to 50 mph will be possible with
this storm.
Locations impacted include...
Rolla... St. James...
Doolittle... Newburg...
Northwye... Jerome...
Rosati...
This includes Interstate 44 near mile marker 169, and between mile
markers 171 and 200.
LAT...LON 3779 9202 3783 9203 3787 9202 3800 9202
3816 9163 3815 9153 3782 9153
TIME...MOT...LOC 2303Z 255DEG 21KT 3791 9196
AlbanoThe St Louis radar (KLSX), 136 km away, was scanning. The volume nearest the first event began at 23:14 UTC.
1 thunderstorm wind. Local standard time, as filed.
Minor roof damage was reported to a home as high winds blew shingles off the home on County Road 7360 near Newburg.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Missouri in 2020Every state in 2020This day in weather historyWarnings in Missouri, June 2020
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 903223.