Alert archive / Colorado / Special Weather Statements in 2018

Special Weather Statement, NWS Goodland, KS

August 31, 2018Washington County, Colorado

NWS Goodland, KS issued this special weather statement at Aug 31, 2018, 6:13 PM MDT for Washington County, Colorado. It was in force for 47 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
Aug 31, 2018, 6:13 PM MDT (00:13 UTC)
Expired
Aug 31, 2018, 7:00 PM MDT
In force
47 min
Issued by
NWS Goodland, KS

County Washington County, CO

The radar

The Goodland radar (KGLD), 102 km from the middle of the area, began a volume at 00:13 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.2 hours before the alert went out and 250 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-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 00:00Z on 2018-09-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1554 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, N. Platte/Lee Bi, NE at 00:00Z on 2018-09-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1554 J/kg
Mixed-layer CIN
-43 J/kg
Mixed-layer LCL
2614 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
89 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.8

Open this sounding in Storm Lab

The text

As transmitted.

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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 Goodland, KS wrote its last area forecast discussion before this special weather statement went out at Aug 31, 5:51 PM MDT, 22 minutes earlier.

Area forecast discussion, Aug 31, 5:51 PM MDT, 22 minutes before
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  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
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  <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>
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Hazardous weather outlook, Aug 31, 2:29 PM MDT, 3 hours 44 minutes before
Hazardous Weather Outlook
National Weather Service Goodland KS
229 PM MDT Fri Aug 31 2018

COZ090>092-KSZ001>004-013>016-027>029-041-042-NEZ079>081-012030-
Yuma County-Kit Carson County-Cheyenne County-Cheyenne-Rawlins-
Decatur-Norton-Sherman-Thomas-Sheridan-Graham-Wallace-Logan-Gove-
Greeley-Wichita-Dundy-Hitchcock-Red Willow-
229 PM MDT Fri Aug 31 2018 /329 PM CDT Fri Aug 31 2018/

This hazardous weather outlook is for extreme southwest Nebraska...
northwest Kansas and east central Colorado.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

Isolated to scattered thunderstorms are possible late this afternoon
and evening with a marginal risk of severe storms producing large
hail and damaging winds mainly east of a line from Tribune, Kansas to
McCook, Nebraska.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH FRIDAY...

There is a marginal risk of severe thunderstorms again late Saturday
across the entire tri-state area. The main threats with any storms
that become severe will be damaging wind and large hail. Localized
heavy rainfall may also produce areas of flash flooding Saturday
evening.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be required.

In the hours before

Special weather statement, Aug 31, 6:13 PM MDT, 0 minutes before
Special Weather Statement
National Weather Service Goodland KS
613 PM MDT FRI AUG 31 2018

COZ090-091-010100-
Kit Carson County CO-Yuma County CO-
613 PM MDT FRI AUG 31 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN YUMA AND
NORTHWESTERN KIT CARSON COUNTIES UNTIL 700 PM MDT...

At 613 PM MDT, thunderstorm outflow was located 6 miles south of
Arickaree School, or 24 miles north of Flagler, moving southeast at
30 mph.

Winds in excess of 40 mph will be possible.

Locations impacted include...
Joes, Kirk and Abarr.

LAT...LON 3957 10280 4008 10279 4008 10275 3957 10249
      3942 10270 3940 10314 3957 10315
TIME...MOT...LOC 0013Z 329DEG 24KT 3966 10305

JN

The office that day

Everything else NWS Goodland, KS issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 31, 7:14 PM MDTSpecial Weather StatementGLDWichita31 min
Aug 31, 7:18 PM MDTSpecial Weather StatementGLDCheyenne27 min
Aug 31, 7:46 PM MDTSevere Thunderstorm WarningGLDGove, Logan44 min
Aug 31, 7:47 PM MDTSevere Thunderstorm WarningGLDCheyenne, Sherman28 min
Aug 31, 8:06 PM MDTTornado WarningGLDLogan24 min
Aug 31, 8:11 PM MDTSevere Thunderstorm WarningGLDCheyenne, Rawlins, Sherman34 min
Aug 31, 8:13 PM MDTTornado WarningGLDGove, Logan32 min
Aug 31, 8:17 PM MDTSevere Thunderstorm WarningGLDGove, Logan28 min
Aug 31, 8:37 PM MDTTornado WarningGLDGove24 min
Aug 31, 8:39 PM MDTSevere Thunderstorm WarningGLDGove, Sheridan36 min
Aug 31, 8:50 PM MDTDust Storm WarningGLDLogan, Sherman, Thomas, Wallace62 min
Aug 31, 9:10 PM MDTSevere Thunderstorm WarningGLDGove, Graham, Sheridan18 min
Aug 31, 9:27 PM MDTSpecial Weather StatementGLDGraham48 min
Aug 31, 9:55 PM MDTSpecial Weather StatementGLDDecatur35 min
Sep 1, 2:08 PM MDTSpecial Weather StatementGLDGove37 min
Sep 1, 2:30 PM MDTSpecial Weather StatementGLDGraham30 min
Sep 1, 2:49 PM MDTSpecial Weather StatementGLDGraham26 min
Sep 1, 3:07 PM MDTSpecial Weather StatementGLDGraham23 min
Sep 1, 3:25 PM MDTSevere Thunderstorm WarningGLDGraham20 min
Aug 31, 6:48 PM MDTSpecial Weather StatementGLDKit Carson42 min
Aug 31, 7:22 PM MDTSpecial Weather StatementGLDKit Carson53 min
Sep 1, 5:22 PM MDTSpecial Weather StatementGLDYuma38 min

Nearby

Special Weather Statements in Colorado, 2018Every special weather statement in 2018

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.