Alert archive / Colorado / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 125, NWS Denver/Boulder, CO

August 13, 1994Adams County, Washington County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Aug 13, 1994, 2:46 PM MDT for Adams County, Washington County, Colorado. It was in force for 29 min.

The area

The counties it named.

The facts

Issued
Aug 13, 1994, 2:46 PM MDT (20:46 UTC)
Expired
Aug 13, 1994, 3:15 PM MDT
In force
29 min
Issued by
NWS Denver/Boulder, CO
Area
Whole counties

Counties Adams County, CO, Washington County, CO

The radar

The Denver radar (KFTG), 68 km from the middle of the area, began a volume at 20:46 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

Denver, CO (KDEN), launched 12:00Z, 8.8 hours before the alert went out and 46 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, Denver, CO at 12:00Z on 1994-08-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 31 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, Denver, CO at 12:00Z on 1994-08-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 47 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
31 J/kg
Mixed-layer CIN
-210 J/kg
Mixed-layer LCL
1551 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
47 m²/s²
0-3 km storm-relative helicity
88 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

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.

In the hours before

Special weather statement, Aug 13, 11:10 AM MDT, 3 hours 36 minutes before
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Special weather statement, Aug 13, 12:18 PM MDT, 2 hours 28 minutes before
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Special weather statement, Aug 13, 12:20 PM MDT, 2 hours 26 minutes before
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Special weather statement, Aug 13, 2:39 PM MDT, 7 minutes before
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Special weather statement, Aug 13, 2:41 PM MDT, 5 minutes before
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Special weather statement, Aug 13, 2:45 PM MDT, 1 minute before
COZ038-040-042>045-049-132130-

SPECIAL WEATHER STATEMENT...CORRECTION...
NATIONAL WEATHER SERVICE DENVER CO
247 PM MDT SAT AUG 13 1994

...STRONG THUNDERSTORMS ERUPTING ACROSS PARTS OF THE FRONT RANGE AND
   NORTHEAST PLAINS...

AT 241 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR WAS SHOWING A LARGE
AREA OF STRONG THUNDERSTORMS ACROSS SOUTHERN AND WESTERN WELD COUNTY...
SOUTHWEST MORGAN...EASTERN LARIMER...AND EASTERN ADAMS COUNTIES.
STRONGEST STORMS WERE NEAR SHAMROCK IN EXTREME NORTHEAST ADAMS COUNTY
AND ALONG THE LARIMER AND WELD COUNTY BORDER NORTHEAST OF FORT COLLINS.

THUNDERSTORMS WERE MOVING TO THE SOUTH AT 15 MPH AND WERE CAPABLE OF
VERY HEAVY RAINFALL WITH UP TO 2 INCHES POlSSIBLE IN LESS THAN AN HOUR...
HAIL...AND STRONG WIND GUSTS.

MOVE INDOORS IF WEATHER THREATENS AND REPORT ANY SIGNIFICANT WEATHER TO
YOUR LOCAL LAW ENFORCEMENT AGENCY.

MCQUEEN
LAT...LON 3969 10342 3968 10472 4082 10506 4021 10375

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 12, 6:15 PM MDTTornado WarningBOUWashington30 min
Aug 12, 6:41 PM MDTSevere Thunderstorm WarningBOUWashington19 min
Aug 12, 7:12 PM MDTSevere Thunderstorm WarningBOUWashington48 min
Aug 13, 1:49 PM MDTSevere Thunderstorm WarningBOUMorgan, Weld41 min
Aug 13, 3:46 PM MDTTornado WarningBOUArapahoe29 min

Nearby

Severe Thunderstorm Warnings in Colorado, 1994Every severe thunderstorm warning in 1994

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.