Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 500, NWS Norman, OK

August 15, 2001Murray County, Pontotoc County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Aug 15, 2001, 8:19 PM CDT for Murray County, Pontotoc County, Oklahoma. It was in force for 41 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: Aug 15, 2001, 8:19 PM CDT (01:19 UTC)
Expired: Aug 15, 2001, 9:00 PM CDT
In force: 41 min
Issued by: NWS Norman, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Murray County, OK, Pontotoc County, OK

The radar

The Norman radar (KTLX), 89 km from the middle of the area, began a volume at 01:21 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

Norman, OK (KOUN), launched 00:00Z, 1.3 hours before the alert went out and 83 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: 2066 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 1836 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 76 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 Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 15, 3:30 PM CDT, 4 hours 49 minutes earlier.

Area forecast discussion, Aug 15, 3:30 PM CDT, 4 hours 49 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
330 PM CDT WED AUG 15 2001

A FEW STORMS ARE ALREADY GOING UP NEAR THE INTERSECTION OF THE
MID-LEVEL TROUGH AND SURFACE COLD FRONT OVER NORTH-CENTRAL
OKLAHOMA... ALONG WITH SCATTERED SHOWERS IN THE NORTHWEST.  AS THE
ASSOCIATED FEATURES DRIFT SOUTHEAST TONIGHT... WE EXPECT THE
PRECIPITATION TO SHIFT IN THAT DIRECTION ALSO.  THE BEST MOISTURE
SUPPLY WILL BE IN THE SOUTHEAST... SO HIGHEST POPS WILL BE THERE.
FOR MOST AREAS TONIGHT... POPS ARE ESSENTIALLY THE ESTIMATE OF AREAL
COVERAGE.

THE FRONT AND UPPER FEATURES LOSE THEIR INFLUENCE OVER MOST OF THE
AREA BY NOON TOMORROW... BUT ANOTHER SYSTEM BRINGS ANOTHER CHANCE OF
RAIN TO THE NORTH.  THE RAIN CHANCES WILL LINGER INTO THE WEEKEND AS
THE NEXT MAJOR SYSTEM ROLLS THROUGH THEN.  THE NEW AVN SUPPORTS THE
MRF SOLUTION OF RESTORING THE UPPER RIDGE TO THE AREA EARLY NEXT
WEEK... AND THE ECMWF IS NOT DRAMATICALLY DIFFERENT.  THIS SUGGESTS
THAT WE CAN SAFELY REMOVE POPS FROM THE MONDAY THROUGH WEDNESDAY
PERIOD.

TEMPERATURES WILL BE GENERALLY NEAR - OR SLIGHTLY BELOW - NORMAL
THROUGH THE WEEKEND... THEN SHOULD TOAST UP A BIT AS THE WEEK
PROGRESSES.

FCSTID = 23 = CMS

OKC   68  88  66  90 /  50  20  20  20
HBR   67  90  67  91 /  40  10  20  20
SPS   70  93  68  93 /  50  30  10  10
GAG   63  86  63  88 /  30  10  30  30
PNC   66  88  67  89 /  40  10  30  30
DUA   71  90  68  92 /  70  50  10  10

.OUN...
OK...NONE.
TX...NONE.

In the hours before

Local storm report, Aug 15, 5:34 PM CDT, 2 hours 45 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
534 PM CDT WED AUG 15 2001

TIME (CDT) .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0355 PM    STILLWATER                OK   77 MPH WIND GUST
08/15/01   PAYNE                          MEASURED BY ASOS

0430 PM    STILLWATER                OK   WIND DAMAGE
08/15/01   PAYNE                          TREES AND TELEPHONE
                                          POLES DOWN AT AIRPORT
                                          REPORTED BY STILLWATER
                                          POLICE DEPARTMENT

0430 PM    STILLWATER                OK   WIND DAMAGE
08/15/01   PAYNE                          POWER POLES DOWN
                                          REPORTED BY STILLWATER
                                          EMERGENCY MANAGEMENT

KT

Local storm report, Aug 15, 5:58 PM CDT, 2 hours 21 minutes before

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Local storm report, Aug 15, 8:14 PM CDT, 5 minutes before

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<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.
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      <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 Norman, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 15, 7:21 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, McClain	39 min
Aug 15, 7:21 PM CDT	Severe Thunderstorm Warning	OUN	Pottawatomie	39 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2001 Every severe thunderstorm warning in 2001

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.