Alert archive / Missouri / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 16, NWS Kansas City, MO

April 8, 1999Adair County, Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Apr 8, 1999, 12:37 PM CDT for Adair County, Missouri. It was in force for 38 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Apr 8, 1999, 12:37 PM CDT (17:37 UTC)
Expired: Apr 8, 1999, 1:15 PM CDT
In force: 38 min
Issued by: NWS Kansas City, MO
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Adair County, MO

The radar

The Des Moines radar (KDMX), 195 km from the middle of the area, began a volume at 17:36 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 8, 12:55 PM CDT	Hail 0.75	Connelsville, MO

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 5.6 hours before the alert went out and 238 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: 2467 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 115 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Kansas City, MO wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 8, 3:15 AM CDT, 9 hours 22 minutes earlier.

Area forecast discussion, Apr 8, 3:15 AM CDT, 9 hours 22 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
315 AM CDT THU APR 8 1999

RATHER POTENT SITUATION SETTING UP FOR CWA THIS AFTERNOON.  FORECAST
CHALLENGES ALMOST EXCLUSIVELY IN THE 1ST PERIOD AND HAVE FOCUSED
MOSTLY ON SVR WX POTL AND THEN GRADIENT WINDS THIS AFTERNOON.

MODELS SLOWLY COMING TOGETHER ON SOLUTION OF BRINGING POWERFUL UPPER
LOW OUT NEGATIVELY TILTED INTO CENTRAL PLAINS THIS AFTERNOON.  RAPID
DEEPENING OF SFC LOW TAKING PLACE NOW OVER HIGH PLAINS.  WARM FRONT
SETTING UP NICELY BASICALLY BISECTING KS E-W ATTM.  WARM FRONT JUST
RECENTLY PASSED THRU CNU.  LLJ ALREADY CRANKING ACROSS WRN KS AND
SHOULD QUICKLY TRANSLATE EWD THIS MORNING.

BASICALLY EXPECTING TWO AREAS OF TSRA IN FIRST PERIOD.  FIRST MAY
ALREADY BE SHOWING SIGNS OF DEVELOPING AS STRONG THETA-E ADVECTION
SHOULD HELP KICK OFF ELEVATED ACTIVITY ACROSS SERN NEB, SWRN IA AND
NWRN MO.  SEEING SOME AC DVLP S OF GRI AND WOULDNT BE SURPRISED TO
SEE THIS GO SOON.  LARGE HAIL/DMGG WINDS A THREAT WITH THIS ROUND.

SECOND ROUND IS ONE THAT REALLY GRABS ATTENTION.  SFC BASED ACTIVITY
SHOULD DEVELOP ALONG FRONT/DRYLINE BY MIDDAY NEARLY OVERHEAD.  ETA
SHOWING 2000 J/KG CAPE AND NEARLY ZERO CIN WITH SRH VALUES AOA 300.
NOT COMMON TO HAVE SUPERCELLULAR ACTIVITY DEVELOP
OVERHEAD...ESPECIALLY AROUND MIDDAY...BUT AM LOOKING FOR REASONS IT
WONT HAPPEN AT THIS POINT AND CANT FIND MANY.  SPC COVERS THE DETAILS
PRETTY WELL IN SWODY1...SO WONT REHASH THAT INFO HERE THOUGH I HAVE
TO MENTION HOW IMPRESSIVE MID LEVEL DRYING AND STRENGTH OF WIND
FIELDS ARE.  OBVIOUSLY WILL HIT THREAT PRETTY HARD IN AM SPS.  GIVEN
SFC TRENDS AND LATEST RUC...WOULDNT BE SURPRISED IF HIGH RISK HAS
TO BE DRAGGED A BIT FURTHER WEST.

AS IF THAT WERENT ENOUGH...GRADIENT WINDS BEHIND FRONT/DRYLINE THIS
AFTERNOON SHOULD EASILY REACH ADVY CRITERIA.  50 KTS AT 850 AND
LITTLE TURNING IN WINDS SHOULD ALLOW GOOD DOWNWARD MOMENTUM
TRANSPORT THIS AFTERNOON...PARTICULARLY IF DRY PUNCH CAN CLEAR
THINGS OUT WHICH IT PROBABLY WILL.

NOT OFTEN WE ARE INCLUDED IN RISK OF SVR FOR DAY 1 AND 2 FOR
DIFFERENT SYSTEMS...BUT WE ARE TODAY.  NEXT SYSTEM LOOKS INTERSTING
TOO.

TEMPS TRICKY THROUGHOUT.  WILL BUMP TEMPS UP TODAY THINKING THAT WE
WILL WARM UP GOOD THIS AFTERNOON.  FWC MAY BE A LITTLE WARM
TONIGHT...OTHERWISE WILL FOLLOW.

.EAX...
MO...WIND ADVISORY THIS AFTERNOON ALL ZONES.
KS...WIND ADVISORY THIS AFTERNOON ALL ZONES.

JM

In the hours before

Special weather statement, Apr 8, 10:31 AM CDT, 2 hours 6 minutes before

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Special weather statement, Apr 8, 10:31 AM CDT, 2 hours 6 minutes before

<!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.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 8, 12:47 PM CDT	Severe Thunderstorm Warning	EAX	Schuyler	43 min
Apr 8, 1:52 PM CDT	Severe Thunderstorm Warning	EAX	Holt	53 min
Apr 8, 2:10 PM CDT	Severe Thunderstorm Warning	EAX	Atchison, Nodaway	50 min
Apr 8, 2:31 PM CDT	Tornado Warning	EAX	Nodaway	29 min
Apr 8, 2:52 PM CDT	Severe Thunderstorm Warning	EAX	Jackson	38 min
Apr 8, 3:37 PM CDT	Severe Thunderstorm Warning	EAX	Lafayette, Ray	38 min
Apr 8, 3:56 PM CDT	Severe Thunderstorm Warning	EAX	Carroll	34 min
Apr 8, 4:03 PM CDT	Tornado Warning	EAX	Carroll	27 min
Apr 8, 4:15 PM CDT	Severe Thunderstorm Warning	EAX	Henry	45 min
Apr 8, 4:20 PM CDT	Tornado Warning	EAX	Chariton	40 min
Apr 8, 4:32 PM CDT	Severe Thunderstorm Warning	EAX	Linn, Livingston	43 min
Apr 8, 4:36 PM CDT	Severe Thunderstorm Warning	EAX	Johnson	39 min
Apr 8, 4:46 PM CDT	Severe Thunderstorm Warning	EAX	Pettis	44 min
Apr 8, 4:54 PM CDT	Tornado Warning	EAX	Linn, Macon	36 min
Apr 8, 4:57 PM CDT	Tornado Warning	EAX	Pettis	33 min
Apr 8, 5:10 PM CDT	Tornado Warning	EAX	Cooper	35 min
Apr 8, 5:28 PM CDT	Tornado Warning	EAX	Macon	32 min
Apr 8, 5:47 PM CDT	Severe Thunderstorm Warning	EAX	Cooper, Howard	43 min
Apr 8, 2:40 PM CDT	Severe Thunderstorm Warning	EAX	Johnson, Miami	30 min

Nearby

Severe Thunderstorm Warnings in Missouri, 1999 Every severe thunderstorm warning in 1999

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.