Alert archive / Colorado / Special Weather Statements in 2018

Special Weather Statement, NWS Pueblo, CO

August 21, 2018Lake County, Colorado

NWS Pueblo, CO issued this special weather statement at Aug 21, 2018, 2:16 PM MDT for Lake County, Colorado. It was in force for 44 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 21, 2018, 2:16 PM MDT (20:16 UTC)
Expired
Aug 21, 2018, 3:00 PM MDT
In force
44 min
Issued by
NWS Pueblo, CO

County Lake County, CO

The radar

The Denver radar (KFTG), 160 km from the middle of the area, began a volume at 20:19 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

Grand Junction, CO (KGJT), launched 12:00Z, 8.3 hours before the alert went out and 189 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, Grand Junction, CO at 12:00Z on 2018-08-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 11 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, Grand Junction, CO at 12:00Z on 2018-08-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 11 square meters per square second.193958Sfc1 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
11 J/kg
Mixed-layer CIN
-403 J/kg
Mixed-layer LCL
2499 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
11 m²/s²
0-3 km storm-relative helicity
121 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Pueblo, CO wrote its last area forecast discussion before this special weather statement went out at Aug 21, 11:43 AM MDT, 2 hours 33 minutes earlier.

Area forecast discussion, Aug 21, 11:43 AM MDT, 2 hours 33 minutes before
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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.
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        Please try again in a few minutes.
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Hazardous weather outlook, Aug 21, 11:26 AM MDT, 2 hours 50 minutes before
Hazardous Weather Outlook
National Weather Service Pueblo CO
1126 AM MDT Tue Aug 21 2018

COZ058>089-093>099-221730-
Western Mosquito Range/East Lake County Above 11000 Feet-
Leadville Vicinity/Lake County Below 11000 Feet-
Eastern Sawatch Mountains Above 11000 Feet-
Western Chaffee County Between 9000 and 11000 Feet-
Central Chaffee County Below 9000 Feet-
Western Mosquito Range/East Chaffee County Above 9000 Feet-
Saguache County West of Continental Divide Below 10000 Feet-
Saguache County East of Continental Divide Below 10000 Feet-
La Garita Mountains Above 10000 Feet-
Upper Rio Grande Valley/Eastern San Juan Mountains Below
10000 Feet-Eastern San Juan Mountains Above 10000 Feet-
Del Norte Vicinity/Northern San Luis Valley Below 8500 Feet-
Alamosa  Vicinity/Central San Luis Valley Below 8500 Feet-
Southern San Luis Valley-
Northern Sangre de Cristo Mountains Between 8500 And 11000 Feet-
Northern Sangre de Cristo Mountains Above 11000 Feet-
Southern Sangre de Cristo Mountains Between 7500 and 11000 Feet-
Southern Sangre de Cristo Mountains Above 11000 Feet-
Northwestern Fremont County Above 8500 Feet-
Western/Central Fremont County Below 8500 Feet-
Wet Mountain Valley Below 8500 Feet-
Wet Mountains between 6300 and 10000 Feet-
Wet Mountains Above 10000 Feet-
Teller County/Rampart Range Above 7500 Feet/Pikes Peak Between
7500 And 11000 Feet-Pikes Peak Above 11000 Feet-
Canon City Vicinity/Eastern Fremont County-
Northern El Paso County/Monument Ridge/Rampart Range Below
7500 Feet-
Colorado Springs Vicinity/Southern El Paso County/Rampart Range
Below 7400 Feet-Pueblo Vicinity/Pueblo County Below 6300 Feet-
Walsenburg Vicinity/Upper Huerfano River Basin Below 7500 Feet-
Trinidad Vicinity/Western Las Animas County Below 7500 Feet-
Crowley County-La Junta Vicinity/Otero County-
Eastern Las Animas County-Western Kiowa County-
Eastern Kiowa County-Las Animas Vicinity/Bent County-
Lamar Vicinity/Prowers County-Springfield Vicinity/Baca County-
1126 AM MDT Tue Aug 21 2018

This hazardous weather outlook is for portions of central...east
central...south central and southeast Colorado.

.DAY ONE...This Afternoon and Tonight

Scattered thunderstorm are expected to develop over the high
terrain late this morning and continue east across the plains
during the afternoon, lasting into the evening and overnight hours
for the far southeast plains. All storms will have the potential
to produce small hail, wind gusts to 40 mph, cloud to ground
lightning, and heavy rain. Flash flooding is possible, especially
with storms moving over burn scars and urban areas. Storms across
the plains will have the potential to produce large hail up to
the size of ping pong balls, and wind gusts to 60 mph late this
afternoon and evening.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Scattered thunderstorms are expected Wednesday across the district.
A few marginal severe storms will be possible, capable of producing
hail up the the size of quarter and wind gusts up to 60 mph. The
best chance for the stronger storms will be along and south of
Highway 50. Over the remainder of the region, thunderstorms will be
capable of locally heavy rain, small hail and gusty winds to 45 mph.

Through the remainder of the week, thunderstorm coverage will be
more isolated, Storms will be capable of gusty winds and small hail,
along with dangerous cloud to ground lightning.

.SPOTTER INFORMATION STATEMENT...

Weather conditions that meet reporting criteria for spotters will be
possible across all of south central and southeast Colorado this
afternoon and evening.

31/31

In the hours before

Special weather statement, Aug 21, 1:32 PM MDT, 44 minutes before
Special Weather Statement
National Weather Service Pueblo CO
132 PM MDT TUE AUG 21 2018

COZ081-084-085-212015-
Colorado Springs Vicinity/Southern El Paso County/Rampart Range Below
7400 Ft CO-
Teller County/Rampart Range above 7500fT/Pike's Peak Between 7500 And
11000 Ft CO-
Northern El Paso County/Monument Ridge/Rampart Range Below 7500 Ft
CO-
132 PM MDT TUE AUG 21 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN TELLER AND
NORTHWESTERN EL PASO COUNTIES UNTIL 215 PM MDT...

At 130 PM MDT, Doppler radar was tracking a strong thunderstorm near
Palmer Lake, or 16 miles northwest of Colorado Springs, moving east
at 30 mph.

Nickel size hail, winds in excess of 40 mph, heavy rain and
lightning are expected with this storm.

Locations impacted include...
Northern Colorado Springs, Monument, Air Force Academy, Palmer Lake,
Green Mountain Falls, Black Forest, Crystola, Peyton, Falcon, Chipita
Park, Gleneagle, Cascade and Cimarron Hills.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Very heavy rainfall is occurring with this storm, and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3887 10443 3892 10502 3904 10503 3913 10508
      3913 10439
TIME...MOT...LOC 1930Z 260DEG 26KT 3905 10496

lw
Special weather statement, Aug 21, 2:06 PM MDT, 10 minutes before
Special Weather Statement
National Weather Service Pueblo CO
206 PM MDT TUE AUG 21 2018

COZ074-075-087-088-212045-
Southern Sangre De Cristo Mountains Between 7500 and 11000 Ft CO-
Walsenburg Vicinity/Upper Huerfano River Basin Below 7500 Ft CO-
Trinidad Vicinity/Western Las Animas County Below 7500 Ft CO-
Southern Sangre De Cristo Mountains Above 11000 Ft CO-
206 PM MDT TUE AUG 21 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL HUERFANO AND
SOUTHWESTERN LAS ANIMAS COUNTIES UNTIL 245 PM MDT...

At 204 PM MDT, Doppler radar was tracking a strong thunderstorm over
Stonewall, or 27 miles west of Trinidad, moving northeast at 20 mph.

Dime size hail, winds in excess of 40 mph, heavy rain and lightning
are expected with this storm.

Locations impacted include...
Stonewall, Gulnare, Boncarbo and Weston.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Very heavy rainfall is occurring with this storm, and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3704 10503 3713 10513 3749 10483 3737 10467
      3721 10456
TIME...MOT...LOC 2004Z 230DEG 19KT 3715 10500

lw
Special weather statement, Aug 21, 2:16 PM MDT, 0 minutes before
Special Weather Statement
National Weather Service Pueblo CO
216 PM MDT TUE AUG 21 2018

COZ058>060-212100-
Leadville Vicinity/Lake County Below 11000 Ft CO-
Western Mosquito Range/East Lake County Above 11000 Ft CO-
Eastern Sawatch Mountains above 11000 Ft CO-
216 PM MDT TUE AUG 21 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN LAKE COUNTY UNTIL 300 PM
MDT...

At 214 PM MDT, Doppler radar was tracking a strong thunderstorm 7
miles northwest of Turquoise Lake, or 46 miles east of Glenwood
Springs, moving east at 35 mph.

Dime size hail, winds in excess of 40 mph, locally heavy rain and
lightning are possible hazards with this storm.

Locations impacted include...
Leadville, Fremont Pass, Climax, Turquoise Lake and Leadville North.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Very heavy rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3935 10636 3936 10630 3935 10629 3938 10622
      3938 10614 3937 10615 3932 10615 3932 10617
      3931 10618 3923 10617 3923 10650 3926 10648
      3930 10650 3931 10648 3932 10644 3935 10643
      3938 10640
TIME...MOT...LOC 2014Z 260DEG 30KT 3932 10651

lw

The office that day

Everything else NWS Pueblo, CO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 21, 1:32 PM MDTSpecial Weather StatementPUBEl Paso43 min
Aug 21, 2:06 PM MDTSpecial Weather StatementPUBHuerfano39 min
Aug 21, 4:06 PM MDTSpecial Weather StatementPUBLas Animas54 min
Aug 21, 4:10 PM MDTSevere Thunderstorm WarningPUBLas Animas65 min
Aug 21, 4:35 PM MDTSpecial Weather StatementPUBLas Animas55 min
Aug 21, 5:35 PM MDTSpecial Weather StatementPUBBent40 min
Aug 21, 5:38 PM MDTSevere Thunderstorm WarningPUBBaca37 min
Aug 21, 5:51 PM MDTSpecial Weather StatementPUBBaca54 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.