Alert archive / Missouri / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 79, NWS Springfield, MO

May 25, 2010St. Clair County, Vernon County, Missouri

NWS Springfield, MO issued this severe thunderstorm warning at May 25, 2010, 6:12 PM CDT for St. Clair County, Vernon County, Missouri. It was in force for 20 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 25, 2010, 6:12 PM CDT (23:12 UTC)
Expired: May 25, 2010, 6:32 PM CDT
In force: 20 min
Issued by: NWS Springfield, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties St. Clair County, MO, Vernon County, MO

The radar

The Springfield radar (KSGF), 98 km from the middle of the area, began a volume at 23:12 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.

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 11.2 hours before the alert went out and 118 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: 1444 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 958 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -11 m²/s²
0-3 km storm-relative helicity: 20 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 25, 3:20 PM CDT, 2 hours 52 minutes earlier.

Area forecast discussion, May 25, 3:20 PM CDT, 2 hours 52 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SPRINGFIELD MO
320 PM CDT TUE MAY 25 2010

.DISCUSSION...

PULSE TYPE THUNDERSTORMS DEVELOPED ACROSS THE MISSOURI OZARKS
TUESDAY WITHIN AN AXIS OF DEEP MOISTURE CONVERGENCE ALONG A NORTH
TO SOUTH SURFACE BOUNDARY FROM NORTHEAST TO SOUTHWEST MISSOURI.
STORMS CONTINUED TO DEVELOPED THROUGH THE AFTERNOON ALONG
PROPAGATING OUTFLOW BOUNDARIES. MIXED LAYER CAPE WAS NEAR 2000
J/KG BUT THERE WAS VERY LITTLE IF ANY SHEAR. ENVIRONMENT WILL BE
FAVORABLE FOR THE CONTINUED DEVELOPMENT OF PULSE TYPE
THUNDERSTORMS THROUGH THE LATE AFTERNOON AND EARLY EVENING HOURS
WHERE OUTFLOW BOUNDARIES INTERACT WITH THE UNSTABLE AIRMASS. THERE IS A
LIMITED RISK FOR SEVERE STORMS WITH LOCALIZED DAMAGING WINDS AND
HAIL. LOCALIZED FLOODING CANNOT BE RULED OUT GIVEN THE SLOW
MOVEMENT OF THE STORMS AND PRECIPITABLE WATER VALUES NEAR 1.5
INCHES.

THE CONVECTION WILL DIMINISH OVERNIGHT WITH THE LOSS OF DAY TIME
HEATING. GIVEN THE MOIST CONDITIONS AND POCKETS OF SIGNIFICANT
RAINFALL THAT OCCURRED TODAY...PATCHY FOG WILL BE POSSIBLE ACROSS
THE AREA EARLY WEDNESDAY MORNING.

AN UPPER RIDGE OF HIGH PRESSURE WILL REMAIN THE DOMINANT WEATHER
FEATURE THE NEXT FEW DAYS. UNDERNEATH THE HIGH A WEAK SURFACE
FRONT WILL SAG SOUTHEAST INTO THE REGION WEDNESDAY. THE MASS
CONVERGENCE ALONG THIS BOUNDARY ALONG WITHIN AN ENVIRONMENT
SIMILAR AS TODAY WILL SUPPORT SCATTERED TO NUMEROUS CONVECTION
WEDNESDAY AFTERNOON. STRONG TO ISOLATED SEVERE PULSE TYPE STORMS
WILL BE POSSIBLE. THE CHANCE OF PRIMARILY DIURNALLY DRIVEN
CONVECTION WILL DEVELOP AGAIN THURSDAY AS THE BOUNDARY SETTLES
SOUTH ACROSS SOUTHERN MISSOURI.

SURFACE HIGH PRESSURE WILL BUILD INTO THE REGION FROM THE GREAT
LAKES TO END THE WEEK ALLOWING DRIER AIR TO ADVECT INTO THE
REGION. EXPECT MOSTLY DRY CONDITIONS FRIDAY INTO SATURDAY. THE
CHANCE OF PRECIPITATION MAY RETURN AS EARLY SUNDAY AND CONTINUE
INTO MEMORIAL DAY AS THE UPPER RIDGE FLATTENS AND A FRONT ATTEMPTS
TO PUSH SOUTH INTO THE REGION.

FOSTER

&&

.AVIATION...

FOR THE 1800Z TAFS...BOTH UPPER LEVEL AND SURFACE RIDGES OF HIGH
PRESSURE OVER THE GREAT LAKES ARCHING SOUTHWARD TO THE CENTRAL
GULF COAST WHICH DOMINATED THE OZARKS AND SOUTHEASTERN KANSAS OVER
THE PAST DAY OR SO ARE GRADUALLY WEAKENING. WEAKENING OF THIS
RIDGE...A WARM MOIST AIRMASS IN PLACE AND A FRONTAL SYSTEM SLOWLY
APPROACHING FROM THE WEST WILL ALLOW CONVECTION TO CONTINUE TO
DEVELOP TODAY AND TOMORROW AFTERNOON. ABUNDANT LOW LEVEL MOISTURE
AND LIGHT WINDS WILL ALLOW GROUND FOG AND HAZE TO DEVELOP DURING
THE EARLY MORNING HOURS...ESPECIALLY IN LOW LYING AREAS. FORECAST
SOUNDINGS DEPICT A SIMILAR ENVIRONMENT FOR WEDNESDAY AFTERNOON
WITH SCATTERED SHOWERS AND THUNDERSTORMS AGAIN POSSIBLE.

FOSTER/COLUCCI

&&

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

Hazardous weather outlook, May 25, 4:22 PM CDT, 1 hour 50 minutes before

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In the hours before

Special weather statement, May 25, 4:31 PM CDT, 1 hour 41 minutes before

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Local storm report, May 25, 4:39 PM CDT, 1 hour 33 minutes before

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Special weather statement, May 25, 5:48 PM CDT, 24 minutes before

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Special weather statement, May 25, 5:50 PM CDT, 22 minutes before

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Local storm report, May 25, 6:04 PM CDT, 8 minutes before

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Local storm report, May 25, 6:10 PM CDT, 2 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 25, 12:07 PM CDT	Flash Flood Warning	SGF	Laclede	3 hr
May 25, 1:57 PM CDT	Areal Flood Advisory	SGF	Camden, Dallas, Laclede	3 hr
May 25, 2:41 PM CDT	Severe Thunderstorm Warning	SGF	Greene, Lawrence	64 min
May 25, 2:55 PM CDT	Severe Thunderstorm Warning	SGF	Ozark, Taney	50 min
May 25, 3:25 PM CDT	Areal Flood Advisory	SGF	Lawrence	3 hr
May 25, 3:30 PM CDT	Flash Flood Warning	SGF	Barry, Ozark, Stone, Taney	4 hr
May 25, 3:37 PM CDT	Severe Thunderstorm Warning	SGF	Dade, Lawrence	38 min
May 25, 5:02 PM CDT	Severe Thunderstorm Warning	SGF	Barton, Vernon	43 min
May 25, 6:54 PM CDT	Areal Flood Warning	SGF	Barry, Ozark, Stone, Taney	6 hr

Nearby

Severe Thunderstorm Warnings in Missouri, 2010 Every severe thunderstorm warning in 2010

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.