Alert archive / Missouri / Special Weather Statements in 2011

Special Weather Statement, NWS Springfield, MO

April 23, 2011Dent County, Missouri

NWS Springfield, MO issued this special weather statement at Apr 23, 2011, 9:32 PM CDT for Dent County, Missouri. It was in force for 28 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 23, 2011, 9:32 PM CDT (02:32 UTC)
Expired: Apr 23, 2011, 10:00 PM CDT
In force: 28 min
Issued by: NWS Springfield, MO

County Dent County, MO

The radar

The St Louis radar (KLSX), 146 km from the middle of the area, began a volume at 02:31 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 00:00Z, 2.5 hours before the alert went out and 206 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: 747 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 135 m²/s²
0-3 km storm-relative helicity: 283 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Apr 23, 7:08 PM CDT, 2 hours 24 minutes earlier.

Area forecast discussion, Apr 23, 7:08 PM CDT, 2 hours 24 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SPRINGFIELD MO
708 PM CDT SAT APR 23 2011

...UPDATE TO AVIATION...

.UPDATE...
/ISSUED 442 PM CDT SAT APR 23 2011/

SHORTWAVE OVER EASTERN OK COOLED MID LEVELS ENOUGH TO ALLOW STORMS
TO BLOSSOM IN AN AREA OF MUCAPE OF 1000-1500 J/KG BASED AT NEAR 800MB.
SOME MID LEVEL STORM ROTATION IN SOME STORMS HAD AIDED IN HAIL
GROWTH. COVERAGE HAS BEEN MORE THAN EXPECTED. HAVE ADDED SEVERE
STORM WORDING TO THE ZFP AND BEEFED UP HWO INTO THE EARLY EVENING
HOURS. LIMITED SFC BASED INSTABILITY...EVEN NEAR THE FRONT ALONG
THE MO/AR BORDER WILL LIKELY LIMIT SFC BASED CONVECTION...SO HAIL
WILL BE THE MAIN THREAT.

DSA

&&

.DISCUSSION...
/ISSUED 201 PM CDT SAT APR 23 2011/

POTENTIALLY VERY DANGEROUS FLASH FLOODING AND AREAL FLOODING ALONG
WITH SEVERE WEATHER CHANCES HIGHLIGHT THE FORECAST CONCERNS OVER
THE NEXT TWO TO THREE DAYS.

A NEARLY STATIONARY FRONT ALONG ROUGHLY THE MO/AR BORDER IS IN
PLACE. HAVE HAS WIDELY SCATTERED ELEVATED CONVECTION NEAR AND
NORTH OF THE FRONT WITH SMALL HAIL FROM STRONGER UPDRAFTS THIS
MORNING. A SEVERE TSTM RISK WILL CONTINUE OVER THE SOUTHERN CWFA
THIS AFTERNOON AND EARLY THIS EVENING AND THEN AGAIN OVERNIGHT AS
A STRENGTHENING LOW LEVEL JET ENHANCES LIFT NORTH OF THE SFC FRONT.
MUCAPES OF 1000 J/KG BASED AT 800MB (21Z GFS KSGF SOUNDING) WILL
SUPPORT THE SHORT TERM STORM THREAT WITH THE MAIN OVERALL STORM
THREAT BEING HAIL...BUT A LOW END RISK FOR NEAR SFC BASED STORMS IS
POSSIBLE OVER FAR SOUTH CENTRAL MO THROUGH EARLY EVENING. AREAS OF HEAVY
RAIN WILL AGAIN BE POSSIBLE TONIGHT WITH THE STRENGTHENING LOW
LEVEL JET.

FOR SUNDAY...CONTINUED CHANCES FOR HEAVY RAIN WILL LINGER INTO
SUNDAY. ELEVATED CONVECTION TO START THE DAY MAY GRADUALLY
TRANSITION TO A MORE SFC BASED STORM THREAT IN THE AFTERNOON AS
THE FRONT IS EXPECTED TO LIFT SLOWLY NORTH INTO SOUTHERN MO. ANY
SEVERE THREAT WILL BE CONTINGENT ON HOW MUCH INSTABILITY CAN
DEVELOP...WITH THE OVERALL BEST CHANCES OVER SOUTHERN MO LATE IN
THE AFTERNOON AND EVENING.

FOR SUNDAY NIGHT...AN APPROACHING SHORTWAVE LIFTING NORTHEAST INTO
THE CENTRAL PLAINS BY MON MORNING WILL ENHANCE THE LOW LEVEL
FLOW AND MOISTURE TRANSPORT INTO THE REGION SUNDAY NIGHT INTO
MONDAY. A STRONGER 50-55KT LOW LEVEL JET AND STRONG LOW LEVEL
MOISTURE TRANSPORT WILL PRODUCED AN ENHANCED RISK FOR FLOODING.
WITH PWATS ON THE ORDER OF 1.5-1.6 INCHES BY SUNDAY EVENING.
STRAIGHT GFS OUTPUT HAS ON THE ORDER OF 3-5 INCHES OF QPF FROM
25/00Z-25/12Z. ROUGHLY ALONG AND SOUTHEAST OF THE I-44 CORRIDOR.
THE ECMWF AND HPC MAY BE A MORE REASONABLE IN TERMS OF QPF...WITH
LESSER 2-3 INCH AMOUNTS. GIVEN THE SOIL CONDITIONS...THIS WILL
LEAD TO FLOODING...AND IN AREAS ALREADY FLOODED...WORSENING
FLOODING. THIS WILL LEAD TO LONGER STEM RIVER FLOODING INTO MON-TUE.

THE APPROACHING SHORTWAVE WILL AND STRONGER MID LEVEL FLOW WILL
POSE A MORE GENERAL SEVERE STORM RISK MON-MON EVENING. AGAIN...THIS WILL
BE TIED TO THE AMOUNT OF INSTABILITY THAT CAN REALIZED WHICH IS
NOT CUT AND DRIED GIVEN HOW MUCH MOISTURE AND CLOUDS THAT MAY BE
IN PLACE. ANOTHER ROUND OF HEAVY RAIN IS EXPECTED LATE MONDAY AND
MONDAY NIGHT...AND THEN AGAIN POTENTIALLY WEDNESDAY WITH ANOTHER
DIGGING SHORTWAVE WED. DRIER WEATHER IS THEN FINALLY EXPECTED AT
THE END OF THE WEEK.

DSA

&&

.AVIATION...
/ISSUED 700 PM CDT SAT APR 23 2011/

FOR THE 24/0000Z KSGF/KJLN/KBBG TAFS...A NEARLY STATIONARY FRONT
ALONG THE MO/AR BORDER WILL SLOWLY INCH NORTH ON SUNDAY. IFR
CEILINGS AND SHRA/TSRA CLOSE TO THE FRONT OVER SOUTHERN MO WILL
CONTINUE...LIKELY EXPANDING NORTHWARD TOWARD I-44 OVERNIGHT.
EXPECT IFR VISIBILITY AT TIMES WITH HEAVIER SHOWERS. THERE WILL
LIKELY BE SOME DIURNAL IMPROVEMENT LATE IN THE TAF PERIOD...BUT
THAT IS HIGHLY CONDITIONAL BASED ON HOW/WHEN THUNDERSTORMS
DEVELOP.

DSA

&&

.SGF WATCHES/WARNINGS/ADVISORIES...
MO...FLASH FLOOD WATCH THROUGH MONDAY AFTERNOON FOR MOZ057-058-
     068>071-077>083-088>098-101>106.

KS...FLASH FLOOD WATCH THROUGH MONDAY AFTERNOON FOR KSZ101.

&&

Hazardous weather outlook, Apr 23, 8:29 PM CDT, 1 hour 3 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SPRINGFIELD MO
829 PM CDT SAT APR 23 2011

KSZ073-097-101-MOZ055>058-066>071-077>083-088>098-101>106-250130-
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-
829 PM CDT SAT APR 23 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF THE MISSOURI
OZARKS AND EXTREME SOUTHEAST KANSAS.

.DAY ONE...TONIGHT.

THE HAZARDOUS WEATHER RISK LEVEL IS...SIGNIFICANT.

WEATHER HAZARDS EXPECTED...

THE HAIL RISK IS ELEVATED.
THE THUNDERSTORM WIND RISK IS LIMITED.
THE FLOODING RISK IS SIGNIFICANT.
THE LIGHTNING RISK IS SIGNIFICANT.

DISCUSSION...

STRONG TO ISOLATED SEVERE THUNDERSTORMS WILL CONTINUE TO PUSH
ACROSS EXTREME SOUTHERN MISSOURI TONIGHT. THESE STORMS WILL BE
CAPABLE OF PRODUCING HAIL TO THE SIZE OF GOLF BALLS AND TORRENTIAL
RAINFALL LEADING TO FLASH FLOODING.

AFTER MIDNIGHT...INCREASING SOUTHERLY LOW LEVEL FLOW ACROSS THE
FRONT WILL LEAD TO ADDITIONAL THUNDERSTORM REDEVELOPMENT...ESPECIALLY
SOUTH OF INTERSTATE 44. AREAS OF HEAVY RAIN AND FLASH FLOODING
WILL AGAIN BE POSSIBLE ALONG WITH THE RISK OF MARGINALLY SEVERE
HAIL.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

THE FRONT IS EXPECTED TO LIFT SLOWLY BACK TO THE NORTH INTO FAR
SOUTHEAST KANSAS AND SOUTHERN MISSOURI SUNDAY WITH AN INCREASED
THREAT FOR SEVERE THUNDERSTORMS NEAR AND SOUTH OF THE FRONT
SUNDAY AFTERNOON AND EVENING.

A POTENTIALLY WIDESPREAD AND DANGEROUS FLOODING RISK MAY DEVELOP
SUNDAY NIGHT INTO MONDAY MORNING WITH HEAVY RAIN PRODUCING
THUNDERSTORMS EXPECTED TO DEVELOP ONCE AGAIN NEAR THE FRONT.

ADDITIONAL CHANCES FOR SEVERE THUNDERSTORMS AND HEAVY RAINFALL
WILL CONTINUE MONDAY NIGHT...AND THEN AGAIN LATE TUESDAY INTO
EARLY WEDNESDAY.

LOCAL INTERESTS ARE URGED TO MONITOR THE LATEST FORECASTS FROM
YOUR NATIONAL WEATHER SERVICE REGARDING THE POTENTIAL FOR
EXCESSIVE RAINFALL AND RESULTANT RISK OF FLOODING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED THROUGH TONIGHT. REPORTS OF
HAIL AND FLOODING CAN BE SENT TO YOUR LOCAL EMERGENCY MANAGEMENT
OR LAW ENFORCEMENT OFFICE.

&&

THIS PRODUCT IS NOW AVAILABLE IN GRAPHICAL FORMAT...ALONG WITH
OTHER WEATHER...HYDROLOGICAL AND CLIMATE INFORMATION...AT
HTTP://WWW.CRH.NOAA.GOV/SGF(ALL LOWERCASE)

LINDENBERG

In the hours before

Local storm report, Apr 23, 7:29 PM CDT, 2 hours 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
729 PM CDT SAT APR 23 2011

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

0728 PM     HAIL             MANSFIELD               37.11N 92.58W
04/23/2011  E1.25 INCH       WRIGHT             MO   AMATEUR RADIO

&&

HATCH

Special weather statement, Apr 23, 7:29 PM CDT, 2 hours 3 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
729 PM CDT SAT APR 23 2011

MOZ104-105-240100-
OZARK MO-TANEY MO-
729 PM CDT SAT APR 23 2011

...SIGNIFICANT WEATHER ALERT FOR EASTERN TANEY AND OZARK COUNTIES
UNTIL 800 PM CDT...

AT 727 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM PROTEM TO 5 MILES
WEST OF UDALL...MOVING EAST AT 55 MPH. NICKEL SIZE HAIL IS EXPECTED
WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE GAINESVILLE.

PEOPLE IN EASTERN TANEY AND OZARK COUNTIES...INCLUDING GAINESVILLE...
SHOULD MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR POSSIBLE
WARNINGS AND BE PREPARED TO TAKE APPROPRIATE ACTION SHOULD SEVERE
WEATHER THREATEN.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT
SUNDAY MORNING FOR SOUTHWESTERN MISSOURI.

LAT...LON 3676 9288 3673 9226 3670 9211 3664 9211
      3649 9227 3650 9317
TIME...MOT...LOC 0029Z 258DEG 46KT 3656 9279 3652 9231

BOXELL

Local storm report, Apr 23, 7:38 PM CDT, 1 hour 54 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
738 PM CDT SAT APR 23 2011

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

0736 PM     FLASH FLOOD      WEST PLAINS             36.73N 91.85W
04/23/2011                   HOWELL             MO   EMERGENCY MNGR

            HIGHWAY CC WEST OF TOWN ALONG WITH THE INTERSECTION OF
            HIGHWAYS KK AND K NEAR SILOAM SPRING WERE CLOSED AND
            IMPASSABLE DUE TO FLOODING.

&&

HATCH

Local storm report, Apr 23, 7:56 PM CDT, 1 hour 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
756 PM CDT SAT APR 23 2011

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

0710 PM     HEAVY RAIN       BRANSON                 36.64N 93.22W
04/23/2011  M3.15 INCH       TANEY              MO   CO-OP OBSERVER

            BRANSON AIRPORT MEASURED 3.15 INCHES OF RAIN FROM 700AM
            TO 700PM.

&&

JCOLUCCI

Special weather statement, Apr 23, 9:04 PM CDT, 28 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
904 PM CDT SAT APR 23 2011

MOZ106-240230-
OREGON MO-
904 PM CDT SAT APR 23 2011

...SIGNIFICANT WEATHER ALERT FOR OREGON COUNTY UNTIL 930 PM CDT...

AT 902 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 4 MILES NORTHEAST OF
THOMASVILLE TO 6 MILES NORTH OF THAYER...MOVING EAST AT 45 MPH.
NICKEL SIZE HAIL IS EXPECTED WITH THESE STORMS.

LOCATIONS IMPACTED INCLUDE ALTON...COUCH...GREER...THAYER...
THOMASVILLE AND WILDERNESS.

PEOPLE IN OREGON COUNTY...INCLUDING ALTON...SHOULD MONITOR THE
WEATHER SITUATION CLOSELY. LISTEN FOR POSSIBLE WARNINGS AND BE
PREPARED TO TAKE APPROPRIATE ACTION SHOULD SEVERE WEATHER THREATEN.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT
SUNDAY MORNING FOR SOUTHWESTERN MISSOURI.

LAT...LON 3651 9159 3688 9157 3689 9138 3688 9122
      3683 9122 3683 9112 3682 9111 3658 9111
      3656 9112
TIME...MOT...LOC 0204Z 262DEG 40KT 3683 9147 3661 9147

BOXELL

Special weather statement, Apr 23, 9:32 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SPRINGFIELD MO
932 PM CDT SAT APR 23 2011

MOZ082-083-240300-
DENT MO-TEXAS MO-
932 PM CDT SAT APR 23 2011

...SIGNIFICANT WEATHER ALERT FOR NORTH CENTRAL TEXAS AND NORTHERN
DENT COUNTIES UNTIL 1000 PM CDT...

AT 931 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 4 MILES NORTHEAST OF LICKING...OR 17 MILES WEST
OF SALEM...MOVING NORTHEAST AT 60 MPH. NICKEL SIZE HAIL IS EXPECTED
WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE ANUTT...BANGERT...HOWES...LENOX...
LICKING...SALEM AND SLIGO.

PEOPLE IN NORTHERN DENT AND NORTHERN TEXAS COUNTIES...INCLUDING
SALEM...SHOULD MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR
POSSIBLE WARNINGS AND BE PREPARED TO TAKE APPROPRIATE ACTION SHOULD
SEVERE WEATHER THREATEN.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT
SUNDAY MORNING FOR SOUTHWESTERN MISSOURI.

LAT...LON 3744 9185 3759 9196 3761 9194 3760 9193
      3760 9182 3760 9181 3767 9181 3779 9158
      3779 9131 3778 9130 3771 9130 3770 9123
TIME...MOT...LOC 0232Z 239DEG 51KT 3756 9181

BOXELL

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 23, 7:10 PM CDT	Severe Thunderstorm Warning	SGF	Dent, Texas	21 min
Apr 23, 7:14 PM CDT	Severe Thunderstorm Warning	SGF	Douglas, Texas, Wright	46 min
Apr 23, 7:20 PM CDT	Severe Thunderstorm Warning	SGF	Howell, Oregon, Shannon	40 min
Apr 23, 7:29 PM CDT	Special Weather Statement	SGF	Ozark	31 min
Apr 23, 7:58 PM CDT	Severe Thunderstorm Warning	SGF	Howell, Oregon, Shannon	62 min
Apr 23, 8:29 PM CDT	River Flood Warning	SGF	McDonald	4 days
Apr 23, 8:37 PM CDT	River Flood Warning	SGF	Stone	5 days
Apr 23, 9:04 PM CDT	Special Weather Statement	SGF	Oregon	26 min
Apr 23, 9:55 PM CDT	River Flood Warning	SGF	Shannon	70 hr
Apr 23, 10:57 PM CDT	Flash Flood Warning	SGF	Dent, Douglas, Howell, Laclede, Phelps, Shannon and 3 more	8 hr
Apr 23, 11:01 PM CDT	Severe Thunderstorm Warning	SGF	Barry, Stone, Taney	27 min
Apr 23, 11:57 PM CDT	Flash Flood Warning	SGF	Barry, Christian, Douglas, McDonald, Stone, Taney	7 hr
Apr 24, 12:53 AM CDT	Flash Flood Warning	SGF	Douglas, Howell, Oregon, Ozark, Shannon	6 hr
Apr 24, 6:36 AM CDT	Flash Flood Warning	SGF	Barry, Christian, McDonald, Newton, Stone, Taney	7 hr
Apr 24, 6:50 AM CDT	Flash Flood Warning	SGF	Douglas, Howell, Oregon, Ozark, Shannon	7 hr
Apr 24, 7:03 AM CDT	Areal Flood Warning	SGF	Dallas, Dent, Laclede, Phelps, Pulaski, Texas and 2 more	7 hr
Apr 24, 7:12 AM CDT	Areal Flood Warning	SGF	Dade, Greene, Jasper, Lawrence, Polk	7 hr
Apr 24, 8:01 AM CDT	River Flood Warning	SGF	Ozark	14 hr
Apr 24, 8:22 AM CDT	Special Weather Statement	SGF	Taney	53 min
Apr 24, 1:45 PM CDT	Flash Flood Warning	SGF	Douglas, Howell, Oregon, Ozark, Shannon, Taney	17 hr
Apr 24, 1:51 PM CDT	Areal Flood Warning	SGF	Dallas, Dent, Greene, Laclede, Phelps, Pulaski and 3 more	17 hr
Apr 24, 1:59 PM CDT	Areal Flood Warning	SGF	Barry, Christian, McDonald, Newton, Stone	17 hr
Apr 24, 2:59 PM CDT	Special Weather Statement	SGF	Oregon	31 min

Nearby

Special Weather Statements in Missouri, 2011 Every special weather statement in 2011

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.