Alert archive / Oregon / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 41, NWS Medford, OR

August 10, 1999Jackson County, Josephine County, Oregon

NWS Medford, OR issued this severe thunderstorm warning at Aug 10, 1999, 5:16 PM PDT for Jackson County, Josephine County, Oregon. It was in force for 59 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 10, 1999, 5:16 PM PDT (00:16 UTC)
Expired: Aug 10, 1999, 6:15 PM PDT
In force: 59 min
Issued by: NWS Medford, OR
Area: Whole counties

Counties Jackson County, OR, Josephine County, OR

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 Medford, OR wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 10, 2:30 PM PDT, 2 hours 46 minutes earlier.

Area forecast discussion, Aug 10, 2:30 PM PDT, 2 hours 46 minutes before

SOUTHWEST OREGON/NORTHERN CALIFORNIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MEDFORD OR
230 PM PDT TUE AUG 10 1999

12Z NGM/ETA/AVN IN.

THE MAIN FORECAST PROBLEM IS SEVERE CONVECTION NOW IN PROGRESS.

UPPER LEVEL CUTOFF LOW NOW CENTERED OVER CENTRAL CALIFORNIA AND IS IN
THE PROCESS OF LIFTING BACK INTO THE WESTERLIES.  MODEL SOLUTIONS
APPEAR TO HAVE A GOOD GRIP ON THIS FEATURE...AND BOTH BRING THE UPPER
LOW TO NEAR THE NEVADA/CALIFORNIA/OREGON TRIPLE POINT AROUND MIDNIGHT
TONIGHT.  THE LOW WILL WEAKEN AND MOVE ON TO THE EAST WEDNESDAY
MORNING.

ANALYSIS OF THE 12Z SOUNDING SHOWS LOTS MORE AVAILABLE MOISTURE TODAY
AND COOLING ALOFT AS WELL.  AFTERNOON TEMPERATURES HAVE GENERATED
PLENTY OF LIFT WITH LOTS OF CAPE.  SO...SEVERE THUNDERSTORMS HAVE
DEVELOPED AND WILL CONTINUE UNTIL THE WEE HOURS OF WEDNESDAY.  WINDS
ALOFT ARE WEAK SO SLOW MOVING THUNDERSTORMS WILL GENERATE LOCALLY
HEAVY RAINS.

CONDITIONS WILL STABILIZE RAPIDLY EARLY WEDNESDAY AS THE LOW MOVES
EAST AND IS REPLACED BY A WEAK UPPER TROUGH.

AT LOW LEVELS...ONCE THE LOW EXITS TONIGHT A MORE TYPICAL SUMMER
PATTERN WILL DEVELOP OVER THE AREA WITH ONSHORE FLOW DIURNALLY
PEAKING IN THE EVENING HOURS AND TROUGHING IN THE MORNING.  SOME WEAK
OFFSHORE FLOW MAY DEVELOP OVER THE SOUTH COAST WEDNESDAY NIGHT.  THE
TROUGH ALOFT SHOULD ASSIST IN INCREASING THE DEPTH OF THE MARINE
LAYER...SO LOOK FOR LOTS MORE LOW CLOUDS AND FOG IN THE UMPQUA
BASIN...DONT THINK IT WILL MAKE IT TO THE ROGUE BASIN DURING THE
NEXT FEW NIGHTS.

ON THURSDAY...A FAIRLY STRONG SHORT WAVE WILL AMPLIFY THE COASTAL
TROUGH AND MAY BRING SOME SHOWERS TO SISKIYOU/MODOC COUNTY THURSDAY
EVENING.  MOST OF THE ENERGY WILL BE TO THE SOUTH.  FOR NOW...WILL
JUST GO FOR PARTLY CLOUDY SKIES IN THE CALIFORNIA ZONES THURSDAY
AFTERNOON.

STOCKTON

.MFR...NONE.

MFR UU 060/085 057/083 058 157000
LMT UU 052/080 047/077 049 158000
RBG BB 058/078 057/077 057 153000
4BK CC 055/064 054/064 054 151110
OTH CC 056/067 055/067 055 151110
YKA UU 046/086 040/085 042 158000
MHS UU 054/080 048/077 050 158000
AAT UU 049/082 049/079 047 158000

In the hours before

Local storm report, Aug 10, 3:48 PM PDT, 1 hour 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MEDFORD OREGON
348 PM PDT TUE AUG 10 1999

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

0346 PM    SELMA                     OR   .88 INCH HAIL
08/10/99   JOSEPHINE                      SPOTTER J038 REPORTS DIME
                                          TO NICKEL SIZED HAIL.

Local storm report, Aug 10, 4:44 PM PDT, 32 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.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Local storm report, Aug 10, 4:45 PM PDT, 31 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.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Nearby

Severe Thunderstorm Warnings in Oregon, 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.