Alert archive / Colorado / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 114, NWS Denver/Boulder, CO

August 8, 1994Logan County, Weld County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Aug 8, 1994, 7:00 PM MDT for Logan County, Weld County, Colorado. It was in force for 40 min.

The area

The counties it named.

The facts

Issued
Aug 8, 1994, 7:00 PM MDT (01:00 UTC)
Expired
Aug 8, 1994, 7:40 PM MDT
In force
40 min
Issued by
NWS Denver/Boulder, CO
Area
Whole counties

Counties Logan County, CO, Weld County, CO

The nearest sounding before it

Denver, CO (KDEN), launched 00:00Z, 1.0 hours before the alert went out and 96 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 00:00Z on 1994-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 716 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 00:00Z on 1994-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 15 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
716 J/kg
Mixed-layer CIN
-146 J/kg
Mixed-layer LCL
2004 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
15 m²/s²
0-3 km storm-relative helicity
53 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 8, 3:40 PM MDT, 3 hours 20 minutes before
COZ039-040-082240-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
340 PM MDT MON AUG 08 1994

AT 335 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF
STRONG THUNDERSTORMS EXTENDING FROM SOUTHWEST GILPIN COUNTY TO SOUTH
CENTRAL JEFFERSON COUNTY...OR 22 MILES SOUTHWEST OF DENVER.  THESE
STORMS HAVE SHOWN IN INCREASE IN INTENSITY DRING THE PAST 10 MINUTES.
MOVEMENT OF THESE STORMS WAS TO THE NORTHEAST AT 20 MPH.

THESE STORMS MAY PRODUCE BRIEF HEAVY RAIN...SMALL HAIL AND STRONG
GUSTY WINDS AS THEY PAST OVER WESTERN PORTIONS OF THE DENVER METRO AREA
BETWEEN 345 AND 430 PM MDT.  SOME STREET FLOODING WILL BE POSSIBLE...
ALONG WITH FLOODING OF DITCHES AND UNDERPASSES.  DRIVERS SHOULD AVOID
THESE AREAS AND DO NOT CROSS FLOODED ROADS AS THEY MAY BE WASHED OUT.

BAKER
Special weather statement, Aug 8, 4:40 PM MDT, 2 hours 20 minutes before
COZ039-040-043-082315-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
440 PM MDT MON AUG 08 1994

AT 432 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE
OF STRONG THUNDERSTORMS EXTENDING FROM EASTERN BOULDER COUNTY 5
MILES EAST NORTHEAST OF BOULDER...TO 8 MILES EAST OF DOWNTOWN
DENVER.  THIS LINE WAS MOVING NORTHEAST AT 15 MPH...AND
WILL MOVE THROUGH ERIE...FORT LUPTON AND BRIGHTON BY 510PM.

THE STORMS HAVE DROPPED SMALL HAIL AND VERY HEAVY RAIN.
LOCAL RAIN AMOUNTS OF ONE INCH ARE POSSIBLE...ALONG WITH WIND GUSTS
TO 50 MPH.  STREET FLOODING WILL CAUSE SOME TRAVEL PROBLEMS FOR
COMMUTERS.  ANYONE IN THE PATH OF THESE STORMS SHOULD TAKE COVER IN A
SAFE BUILDING UNTIL STORMS PASS.

RTG
Special weather statement, Aug 8, 4:47 PM MDT, 2 hours 13 minutes before
COZ039-040-043-082315-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
440 PM MDT MON AUG 08 1994

AT 432 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE
OF STRONG THUNDERSTORMS EXTENDING FROM EASTERN BOULDER COUNTY 5
MILES EAST NORTHEAST OF BOULDER...TO 8 MILES EAST OF DOWNTOWN
DENVER.  THIS LINE WAS MOVING NORTHEAST AT 15 MPH...AND
WILL MOVE THROUGH ERIE...FORT LUPTON AND BRIGHTON BY 510PM.

THE STORMS HAVE DROPPED SMALL HAIL AND VERY HEAVY RAIN.
LOCAL RAIN AMOUNTS OF ONE INCH ARE POSSIBLE...ALONG WITH WIND GUSTS
TO 50 MPH.  STREET FLOODING WILL CAUSE SOME TRAVEL PROBLEMS FOR
COMMUTERS.  ANYONE IN THE PATH OF THESE STORMS SHOULD TAKE COVER IN A
SAFE BUILDING UNTIL STORMS PASS.

RTG
Special weather statement, Aug 8, 5:42 PM MDT, 1 hour 18 minutes before
COZ044-090005-

SPECIAL WEATHER STATEMENT...COR TO TIME IN 1ST PARAGRAPH...
NATIONAL WEATHER SERVICE DENVER CO
542 PM MDT MON AUG 08 1994

AT 540 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE
LEADING EDGE OF VERY STRONG WINDS RADIATING OUTWARD FROM STRONG
THUNDERSTORMS OVER SOUTHEAST WELD AND WESTERN MORGAN COUNTIES.  THE
LEADING EDGE OF THESE WINDS WAS LOCATED JUST WEST OF FORT MORGAN AS OF
538 PM.

WIND GUSTS OF 35 TO 50 MILES AN HOUR ARE EXPECTED IN THE FORT MORGAN
AREA BETWEEN 545 AND 550 PM MDT.

PERSONS IN THE PATH OF THESE WINDS SHOULD IMMEDIATELY MOVE TO A PLACE
OF SAFETY.  BLOW DUST AND DEBRIS MAY SEVERELY REDUCE VISIBILITIES AND
MAY CAUSE DAMAGE TO SMALL OBJECTS AND STRUCTURES NOT SECURELY TIED
DOWN.

BAKER
Special weather statement, Aug 8, 5:44 PM MDT, 1 hour 16 minutes before
COZ044-090005-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
542 PM MDT MON AUG 08 1994

AT 540 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE
LEADING EDGE OF VERY STRONG WINDS RADIATING OUTWARD FROM STRONG
THUNDERSTORMS OVER SOUTHEAST WELD AND WESTERN MORGAN COUNTIES.  THE
LEADING EDGE OF THESE WINDS WAS LOCATED JUST WEST OF FORT MORGAN AS OF
440 PM.

WIND GUSTS OF 35 TO 50 MILES AN HOUR ARE EXPECTED IN THE FORT MORGAN
AREA BETWEEN 545 AND 550 PM MDT.

PERSONS IN THE PATH OF THESE WINDS SHOULD IMMEDIATELY MOVE TO A PLACE
OF SAFETY.  BLOW DUST AND DEBRIS MAY SEVERELY REDUCE VISIBILITIES AND
MAY CAUSE DAMAGE TO SMALL OBJECTS AND STRUCTURES NOT SECURELY TIED
DOWN.

BAKER
Special weather statement, Aug 8, 5:46 PM MDT, 1 hour 14 minutes before
COZ044-090005-

SPECIAL WEATHER STATEMENT...COR TO TIME IN 1ST PARAGRAPH...
NATIONAL WEATHER SERVICE DENVER CO
542 PM MDT MON AUG 08 1994

AT 540 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE
LEADING EDGE OF VERY STRONG WINDS RADIATING OUTWARD FROM STRONG
THUNDERSTORMS OVER SOUTHEAST WELD AND WESTERN MORGAN COUNTIES.  THE
LEADING EDGE OF THESE WINDS WAS LOCATED JUST WEST OF FORT MORGAN AS OF
538 PM.

WIND GUSTS OF 35 TO 50 MILES AN HOUR ARE EXPECTED IN THE FORT MORGAN
AREA BETWEEN 545 AND 550 PM MDT.

PERSONS IN THE PATH OF THESE WINDS SHOULD IMMEDIATELY MOVE TO A PLACE
OF SAFETY.  BLOW DUST AND DEBRIS MAY SEVERELY REDUCE VISIBILITIES AND
MAY CAUSE DAMAGE TO SMALL OBJECTS AND STRUCTURES NOT SECURELY TIED
DOWN.

BAKER

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 8, 6:50 PM MDTSevere Thunderstorm WarningBOUAdams, Arapahoe40 min
Aug 8, 7:07 PM MDTSevere Thunderstorm WarningBOUArapahoe, Washington38 min
Aug 8, 7:17 PM MDTTornado WarningBOUArapahoe, Washington28 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.