Alert archive / Montana / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 52, NWS Glasgow, MT

August 6, 2003Phillips County, Montana

NWS Glasgow, MT issued this severe thunderstorm warning at Aug 6, 2003, 7:16 PM MDT for Phillips County, Montana. 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 6, 2003, 7:16 PM MDT (01:16 UTC)
Expired: Aug 6, 2003, 8:15 PM MDT
In force: 59 min
Issued by: NWS Glasgow, MT
Area: Counties, with a storm outline in the text

County Phillips County, MT

The radar

The Glasgow radar (KGGW), 96 km from the middle of the area, began a volume at 01:18 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 6, 4:50 PM MDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 1.3 hours before the alert went out and 97 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: 29 J/kg
Mixed-layer CIN: -218 J/kg
Mixed-layer LCL: 3137 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 139 m²/s²
0-3 km storm-relative helicity: 299 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 Glasgow, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 6, 3:15 PM MDT, 4 hours 1 minute earlier.

Area forecast discussion, Aug 6, 3:15 PM MDT, 4 hours 1 minute before

NORTHEAST MONTANA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
315 PM MDT WED AUG 6 2003

.SHORT TERM...TONIGHT THRU FRI...
MODELS INDICATE STRONG SURFACE GRADIENTS WILL KEEP WINDS ABOVE LAKE
WIND CRITERIA THROUGH NIGHT. ONE DISTURBANCE MOVING NE INTO AB. GFS
AND ETA INDICATE ANOTHER DISTURBANCE TO RAPIDLY AND STRONGLY DEVELOP
OVER SW MT THIS EVENING...OTHER MODELS MUCH WEAKER. WATER VAPOR
MOISTENING UP FROM THE SW. FEEL THAT GFS AND ETA DONT SEEM TO HAVE
A GOOD HANDLE ON THESE AND ARE OVERDONE. HOWEVER THE AIRMASS IS
MOIST AND UNSTABLE AND WONT TAKE MUCH TO GENERATE STRONG
CONVECTION. STRONG UPPER HIGH PRESSURE RIDGE REMAINING OVER AREA
THOUGH WHICH WILL DISCOURAGE CONVECTION...BUT NO UPPER SUBSIDENCE
CAPPING INVERSION OF NOTE. ALL AND ALL FEEL THERE WILL BE ISOLATED
THUNDERSTORMS TONIGHT...BEST CHANCE IN OUR WEST. POSSIBILITY OF
ISOLATED SEVERE OCCURRENCE MOSTLY WEST. SPC HAS WESTERN 2/3 OF AREA
IN SLIGHT RISK.

OVERALL LONGWAVE PATTERN DOESNT CHANGE MUCH WITH UPPER LOW OFF WEST
COAST BEING REINFORCD...AN STRRONG UPPER HIGH OVER SW STATES
STRONGLY RIDGING NORTH AND NOT MOVING. THEREFORE WILL RAISE HIGHS
AND GO WITH A PERSISTENTLY HOT FORECAST. WILL KEEP BROADBRUSH
ISOLATED THUNDERSTORMS FRIDAY. ALL MOS PERSISTENTLY TOO
CLOUDY...COOL...AND WET FOR THIS PATTERN AND TIME OF YEAR. SIMONSEN

.LONG TERM...FRI NIGHT THRU MON...
SAME AS ABOVE. MORE OF THE SAME AND HAVE RAISED TEMPERATURES WITH
GENERALLY HOT AND DRY WEATHER. SIMONSEN

KGGW BBB 066/096 065/097 063/095 82202220
     BBBB 063/095 062/095 062/091 062/088 8200000000

KGDV BBB 065/099 066/100 065/097 82022220
     BBBB 065/097 064/096 063/091 063/090 8200000000

.GGW...LAKE WIND ADVISORY FOR FORT PECK LAKE TONIGHT.

SIMONSEN

Hazardous weather outlook, Aug 6, 5:14 PM MDT, 2 hours 2 minutes before

MTZ016>027-059>062-072315-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GLASGOW MT
514 PM MDT WED AUG 6 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST MONTANA

DAY ONE...

A LAKE WIND ADVISORY REMAINS IN EFFECT FOR FORT PECK LAKE THIS
TONIGHT. REFER TO GTFNPWGGW OR WWUS75 KGGW FOR FURTHER
INFORMATION.

ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE OVER NORTHEAST MONTANA
BEGINNING THIS EVENING IN WESTERN SECTIONS...PHILLIPS AND PETROLEUM
COUNTIES...SPREADING TO EASTERN SECTIONS OF NORTHEAST MONTANA LATE
TONIGHT. THE GREATEST THREAT FROM THE STORMS WILL BE STRONG GUSTY
WINDS AND LARGE HAIL.

.DAYS TWO THROUGH SEVEN...
MOIST SOUTHWEST FLOW ALOFT WILL CONTINUE TO BRING THE SLIGHT RISK
FOR SEVERE THUNDERSTORMS TO NORTHEAST MONTANA ON THURSDAY. STRONG
GUSTY WINDS AND LARGE HAIL WILL REMAIN THE BIGGEST THREAT FROM ANY
SEVERE STORMS THAT DEVELOP IN THE AREA ON THURSDAY.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

SIMONSEN

In the hours before

Local storm report, Aug 6, 6:21 PM MDT, 55 minutes before

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Local storm report, Aug 6, 6:44 PM MDT, 32 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.
      </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 Glasgow, MT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 6, 6:14 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	61 min
Aug 6, 8:12 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Petroleum, Phillips, Valley	63 min
Aug 6, 8:30 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Phillips, Valley	60 min
Aug 6, 9:18 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	57 min
Aug 6, 9:29 PM MDT	Severe Thunderstorm Warning	GGW	Valley	61 min
Aug 6, 10:13 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	62 min
Aug 6, 10:30 PM MDT	Tornado Warning	GGW	Garfield	60 min
Aug 6, 11:20 PM MDT	Severe Thunderstorm Warning	GGW	Garfield	55 min
Aug 6, 11:53 PM MDT	Severe Thunderstorm Warning	GGW	Dawson, McCone	52 min
Aug 7, 12:15 AM MDT	Severe Thunderstorm Warning	GGW	Garfield, Valley	60 min
Aug 7, 12:53 AM MDT	Severe Thunderstorm Warning	GGW	Dawson	67 min
Aug 7, 1:25 AM MDT	Severe Thunderstorm Warning	GGW	Richland, Wibaux	65 min
Aug 7, 2:50 AM MDT	Severe Thunderstorm Warning	GGW	Valley	55 min
Aug 7, 5:43 PM MDT	Severe Thunderstorm Warning	GGW	Petroleum	62 min
Aug 7, 5:48 PM MDT	Severe Thunderstorm Warning	GGW	Phillips	57 min

Nearby

Severe Thunderstorm Warnings in Montana, 2003 Every severe thunderstorm warning in 2003

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.