Alert archive / Colorado / Special Weather Statements in 2024

Special Weather Statement, NWS Denver/Boulder, CO

June 14, 2024Jefferson County, Colorado

NWS Denver/Boulder, CO issued this special weather statement at Jun 14, 2024, 1:08 PM MDT for Jefferson County, Colorado. It was in force for 37 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: Jun 14, 2024, 1:08 PM MDT (19:08 UTC)
Expired: Jun 14, 2024, 1:45 PM MDT
In force: 37 min
Issued by: NWS Denver/Boulder, CO
Hail: 0.25 in
Wind: 40

County Jefferson County, CO

The radar

The Denver radar (KFTG), 78 km from the middle of the area, began a volume at 19:09 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 12:00Z, 7.1 hours before the alert went out and 442 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1667 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 78 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.5

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 Denver/Boulder, CO wrote its last area forecast discussion before this special weather statement went out at Jun 14, 11:22 AM MDT, 1 hour 46 minutes earlier.

Area forecast discussion, Jun 14, 11:22 AM MDT, 1 hour 46 minutes before

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<head>
  <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.
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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, Jun 14, 10:35 AM MDT, 2 hours 33 minutes before

Hazardous Weather Outlook
National Weather Service Denver/Boulder CO
1035 AM MDT Fri Jun 14 2024

COZ030>051-151645-
Jackson County Below 9000 Feet-
West Jackson and West Grand Counties Above 9000 Feet-
Grand and Summit Counties Below 9000 Feet-
South and East Jackson/Larimer/North and Northeast Grand/
Northwest Boulder Counties Above 9000 Feet-
South and Southeast Grand/West Central and Southwest Boulder/
Gilpin/Clear Creek/Summit/North and West Park Counties Above
9000 Feet-Larimer and Boulder Counties Between 6000 and 9000 Feet-
Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear
Creek/Northeast Park Counties Below 9000 Feet-
Central and Southeast Park County-
Larimer County Below 6000 Feet/Northwest Weld County-
Boulder And Jefferson Counties Below 6000 Feet/West Broomfield
County-
North Douglas County Below 6000 Feet/Denver/West Adams and
Arapahoe Counties/East Broomfield County-
Elbert/Central and East Douglas Counties Above 6000 Feet-
Northeast Weld County-Central and South Weld County-Morgan County-
Central and East Adams and Arapahoe Counties-
North and Northeast Elbert County Below 6000 Feet/North Lincoln
County-
Southeast Elbert County Below 6000 Feet/South Lincoln County-
Logan County-Washington County-Sedgwick County-Phillips County-
1035 AM MDT Fri Jun 14 2024

This hazardous weather outlook is for northeast and north central
Colorado.

.DAY ONE...Today and Tonight

Scattered to numerous showers and storms will occur this
afternoon. Storms first form over the mountains and foothills
around noon and the progress eastward through the afternoon hours.
Storms may become severe east of the I-25 corridor producing
large hail, damaging wind gusts up to 65 mph, and heavy rainfall.
Localized flooding will also be possible where prolonged rainfall
occurs.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Hot and mainly dry weather will return to the forecast area this
weekend with temperatures climbing back above 90 across the urban
corridor and plains.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed this afternoon.

In the hours before

Special weather statement, Jun 14, 12:16 PM MDT, 52 minutes before

Special Weather Statement
National Weather Service Denver CO
1216 PM MDT Fri Jun 14 2024

COZ034>036-141900-
South and Southeast Grand/West Central and Southwest
Boulder/Gilpin/Clear Creek/Summit/North and West Park Counties Above
9000 Feet CO-
Larimer and Boulder Counties Between 6000 and 9000 Feet CO-
Jefferson and West Douglas Counties Above  6000 Feet/Gilpin/Clear
Creek/Northeast Park Counties Below 9000 Feet CO-
1216 PM MDT Fri Jun 14 2024

...A STRONG THUNDERSTORM WILL IMPACT GILPIN...NORTHEASTERN CLEAR
CREEK...NORTHWESTERN JEFFERSON AND SOUTHWESTERN BOULDER COUNTIES
THROUGH 100 PM MDT...

At 1215 PM MDT, Doppler radar was tracking a strong thunderstorm over
Idaho Springs, or 30 miles west of Denver, moving north at 25 mph.

HAZARD...Wind gusts up to 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Idaho Springs, Nederland, Central City, Black Hawk, Rollinsville,
Blue Valley, Pinecliffe, Aspen Springs, Eldora, and Eldorado Springs.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4003 10557 3996 10527 3965 10546 3969 10560
TIME...MOT...LOC 1815Z 194DEG 21KT 3974 10551

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

MENSCH

Special weather statement, Jun 14, 12:25 PM MDT, 43 minutes before

Special Weather Statement
National Weather Service Denver CO
1225 PM MDT Fri Jun 14 2024

COZ048-050-141900-
Sedgwick County CO-Logan County CO-
1225 PM MDT Fri Jun 14 2024

...A STRONG THUNDERSTORM WILL IMPACT NORTHEASTERN LOGAN AND
NORTHWESTERN SEDGWICK COUNTIES THROUGH 100 PM MDT...

At 1225 PM MDT, Doppler radar was tracking a strong thunderstorm 6
miles northeast of Twin Buttes, or 15 miles southwest of Chappell,
moving northeast at 30 mph.

HAZARD...Wind gusts up to 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

This storm will remain over mainly rural areas of northeastern Logan
and northwestern Sedgwick Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4090 10274 4100 10285 4100 10254
TIME...MOT...LOC 1825Z 231DEG 25KT 4099 10272

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

MENSCH

Special weather statement, Jun 14, 1:08 PM MDT, 0 minutes before

Special Weather Statement
National Weather Service Denver CO
108 PM MDT Fri Jun 14 2024

COZ034-036-141945-
South and Southeast Grand/West Central and Southwest
Boulder/Gilpin/Clear Creek/Summit/North and West Park Counties Above
9000 Feet CO-
Jefferson and West Douglas Counties Above  6000 Feet/Gilpin/Clear
Creek/Northeast Park Counties Below 9000 Feet CO-
108 PM MDT Fri Jun 14 2024

...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN GILPIN...
SOUTHEASTERN CLEAR CREEK AND NORTHWESTERN JEFFERSON COUNTIES THROUGH
145 PM MDT...

At 108 PM MDT, Doppler radar was tracking a strong thunderstorm near
Brookvale, or 28 miles west of Denver, moving northeast at 10 mph.

HAZARD...Wind gusts up to 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Evergreen, Idaho Springs, Kittredge, Blue Valley, Brookvale, Bergen
Park, Floyd Hill, Indian Hills, and Aspen Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3955 10552 3973 10556 3983 10536 3956 10523
TIME...MOT...LOC 1908Z 247DEG 7KT 3963 10548

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

MENSCH

The office that day

Everything else NWS Denver/Boulder, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 13, 6:07 PM MDT	Special Weather Statement	BOU	Larimer	23 min
Jun 13, 9:42 PM MDT	Special Weather Statement	BOU	Larimer	48 min
Jun 13, 10:27 PM MDT	Special Weather Statement	BOU	Weld	48 min
Jun 14, 12:16 PM MDT	Special Weather Statement	BOU	Gilpin	44 min
Jun 14, 12:25 PM MDT	Special Weather Statement	BOU	Sedgwick	35 min
Jun 14, 1:34 PM MDT	Special Weather Statement	BOU	Jefferson	26 min
Jun 14, 1:46 PM MDT	Special Weather Statement	BOU	Douglas	44 min
Jun 14, 1:52 PM MDT	Severe Thunderstorm Warning	BOU	Arapahoe, Denver, Douglas, Jefferson	38 min
Jun 14, 2:26 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe, Denver, Douglas	15 min
Jun 14, 2:55 PM MDT	Special Weather Statement	BOU	Elbert	50 min
Jun 14, 3:20 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Morgan	40 min
Jun 14, 3:38 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln	14 min
Jun 14, 3:41 PM MDT	Special Weather Statement	BOU	Elbert	49 min
Jun 14, 3:59 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Morgan	33 min
Jun 14, 4:00 PM MDT	Special Weather Statement	BOU	Phillips	45 min
Jun 14, 4:23 PM MDT	Severe Thunderstorm Warning	BOU	Phillips	52 min
Jun 14, 4:28 PM MDT	Severe Thunderstorm Warning	BOU	Washington	47 min
Jun 14, 4:30 PM MDT	Severe Thunderstorm Warning	BOU	Washington	45 min
Jun 14, 4:51 PM MDT	Severe Thunderstorm Warning	BOU	Washington	39 min
Jun 14, 5:14 PM MDT	Special Weather Statement	BOU	Washington	46 min
Jun 14, 5:15 PM MDT	Severe Thunderstorm Warning	BOU	Washington	32 min
Jun 14, 5:28 PM MDT	Flash Flood Warning	BOU	Phillips	2 hr
Jun 14, 5:32 PM MDT	Severe Thunderstorm Warning	BOU	Logan, Washington	31 min

Nearby

Special Weather Statements in Colorado, 2024 Every special weather statement in 2024

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.