Alert archive / Colorado / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 50, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 18, 1994, 12:59 PM MDT for Douglas County, Colorado. It was in force for 31 min.
The area
The counties it named.
The facts
- Issued
- Jun 18, 1994, 12:59 PM MDT (18:59 UTC)
- Expired
- Jun 18, 1994, 1:30 PM MDT
- In force
- 31 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
County Douglas County, CO
The radar
The Denver radar (KFTG), 61 km from the middle of the area, began a volume at 19:01 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, 7.0 hours before the alert went out and 158 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.
- Mixed-layer CAPE
- 1621 J/kg
- Mixed-layer CIN
- -170 J/kg
- Mixed-layer LCL
- 988 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 48 m²/s²
- 0-3 km storm-relative helicity
- 37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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, Jun 18, 10:47 AM MDT, 2 hours 12 minutes before
COZ015-030>050-067-071-072-190600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 1100 AM MDT SAT JUN 18 1994 THIS OUTLOOK PERTAINS TO THE FOLLOWING COLORADO COUNTIES ADAMS ARAPAHOE BOULDER CLEAR CREEK DENVER DOUGLAS ELBERT EL PASO GILPIN GRAND JACKSON JEFFERSON LAKE LARIMER LINCOLN LOGAN MORGAN PARK PHILLIPS SEDGWICK SUMMIT TELLER WASHINGTON WELD AMPLE MOISTURE WILL BE AVAILABLE FOR THUNDERSTORM DEVELOPMENT THIS AFTERNOON AND EVENING. AN UPPER LEVEL DISTURBANCE OVER SOUTHERN COLORADO WILL BE MOVING NORTHWARD DURING THE PERIOD. SCATTERED STORMS WILL DEVELOP ALONG THE FOOTHILLS AND PALMER DIVIDE BY 1 PM...THEN SPREAD EASTWARD THROUGHOUT THE NORTHEAST PLAINS AND BORDER AREAS BY EVENING. THERE WILL BE A GOOD POTENTIAL FOR SEVERE STORMS...WITH LARGE HAIL BEING THE MAIN THREAT. 8 SPOTTER NETWORKS WILL LIKELY BE ACTIVATED THIS AFTERNOON AND EVENING. DULONG
Special weather statement, Jun 18, 11:00 AM MDT, 1 hour 59 minutes before
COZ015-030>050-067-071-072-190600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 1100 AM MDT SAT JUN 18 1994 THIS OUTLOOK PERTAINS TO THE FOLLOWING COLORADO COUNTIES ADAMS ARAPAHOE BOULDER CLEAR CREEK DENVER DOUGLAS ELBERT EL PASO GILPIN GRAND JACKSON JEFFERSON LAKE LARIMER LINCOLN LOGAN MORGAN PARK PHILLIPS SEDGWICK SUMMIT TELLER WASHINGTON WELD AMPLE MOISTURE WILL BE AVAILABLE FOR THUNDERSTORM DEVELOPMENT THIS AFTERNOON AND EVENING. AN UPPER LEVEL DISTURBANCE OVER SOUTHERN COLORADO WILL BE MOVING NORTHWARD DURING THE PERIOD. SCATTERED STORMS WILL DEVELOP ALONG THE FOOTHILLS AND PALMER DIVIDE BY 1 PM...THEN SPREAD EASTWARD THROUGHOUT THE NORTHEAST PLAINS AND BORDER AREAS BY EVENING. THERE WILL BE A GOOD POTENTIAL FOR SEVERE STORMS...WITH LARGE HAIL BEING THE MAIN THREAT. SPOTTER NETWORKS WILL LIKELY BE ACTIVATED THIS AFTERNOON AND EVENING. DULONG
Special weather statement, Jun 18, 12:17 PM MDT, 42 minutes before
COZ038>050-091-092-181900- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 1220 PM MDT SAT JUN 18 1994 ...THUNDERSTORMS BUILDING RAPIDLY OVER THE FRONT RANGE FOOTHILLS... AT 1215 PM MDT...SCATTERED THUNDERSTORMS WERE BUILDING RAPIDLY FROM WESTERN JEFFERSON COUNTY NORTHWARD THROUGH WESTERN BOULDER COUNTY INTO WESTERN LARIMER COUNTY. THESE STORMS SHOWED LITTLE MOVEMENT. SCATTERED THUNDERSTORMS SHOULD DEVELOP EASTWARD OVER MUCH OF THE NORTHEAST PLAINS BY 3 PM. THERE WILL BE GOOD POTENTIAL FOR SEVERE STORMS THIS AFTERNOON AND EVENING. THE MAIN THREAT WILL BE LARGE HAIL AND HEAVY RAINFALL. BE READY FOR THREATENING WEATHER...ESPECIALLY IF YOU PLAN TO BE OUTDOORS. STORMS WILL POP UP QUICKLY. HEAVY RAINFALL COULD RESULT IN LOCALIZED FLOODING. KEEP TUNED TO NOAA WEATHER FOR POSSIBLE WATCHES...WARNINGS...OR OTHER WEATHER STATEMENTS. DULONG
Special weather statement, Jun 18, 12:20 PM MDT, 39 minutes before
COZ038>050-091-092-181900- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 1220 PM MDT SAT JUN 18 1994 ...THUNDERSTORMS BUILDING RAPIDLY OVER THE FRONT RANGE FOOTHILLS... AT 1215 PM MDT...SCATTERED THUNDERSTORMS WERE BUILDING RAPIDLY FROM WESTERN JEFFERSON COUNTY NORTHWARD THROUGH WESTERN BOULDER COUNTY INTO WESTERN LARIMER COUNTY. THESE STORMS SHOWED LITTLE MOVEMENT. SCATTERED THUNDERSTORMS SHOULD DEVELOP EASTWARD OVER MUCH OF THE NORTHEAST PLAINS BY 3 PM. THERE WILL BE GOOD POTENTIAL FOR SEVERE STORMS THIS AFTERNOON AND EVENING. THE MAIN THREAT WILL BE LARGE HAIL AND HEAVY RAINFALL. BE READY FOR THREATENING WEATHER...ESPECIALLY IF YOU PLAN TO BE OUTDOORS. STORMS WILL POP UP QUICKLY. HEAVY RAINFALL COULD RESULT IN LOCALIZED FLOODING. KEEP TUNED TO NOAA WEATHER FOR POSSIBLE WATCHES...WARNINGS...OR OTHER WEATHER STATEMENTS. DULONG
Special weather statement, Jun 18, 12:50 PM MDT, 9 minutes before
COZ040>041-045-181930- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 1250 PM MDT SAT JUN 18 1994 ...STRONG THUNDERSTORM WITH HAIL IN DOUGLAS COUNTY... ...TORNADO WATCH IN EFFECT FOR URBAN CORRIDOR AND ADJACENT PLAINS UNTIL 700 PM MDT THIS EVENING... AT 1240 PM MDT...PEA TO MARBLE SIZE HAIL WAS OCCURRING IN THE CITY OF CASTLE ROCK. DOPPLER RADAR SHOWED THIS STORM MOVING VERY SLOWLY TOWARDS THE NORTH. OTHER STORMS WERE RAPIDLY DEVELOPING NORTHEASTWARD ALONG A BOUNDARY FROM NEAR PARKER AND FRANKTOWN TO THE BENNETT AREA. THESE STORMS SHOULD SPREAD TOWARDS METRO DENVER BY 2 PM. TAKE COVER IF THREATENING WEATHER APPROACHES...AND MONITOR NOAA WEATHER RADIO FOR POSSIBLE WARNINGS. DULONG WWUS35KSDF .D
Special weather statement, Jun 18, 12:52 PM MDT, 7 minutes before
COZ040>041-045-181930- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 1250 PM MDT SAT JUN 18 1994 ...STRONG THUNDERSTORM WITH HAIL IN DOUGLAS COUNTY... ...TORNADO WATCH IN EFFECT FOR URBAN CORRIDOR AND ADJACENT PLAINS UNTIL 700 PM MDT THIS EVENING... AT 1240 PM MDT...PEA TO MARBLE SIZE HAIL WAS OCCURRING IN THE CITY OF CASTLE ROCK. DOPPLER RADAR SHOWED THIS STORM MOVING VERY SLOWLY TOWARDS THE NORTH. OTHER STORMS WERE RAPIDLY DEVELOPING NORTHEASTWARD ALONG A BOUNDARY FROM NEAR PARKER AND FRANKTOWN TO THE BENNETT AREA. THESE STORMS SHOULD SPREAD TOWARDS METRO DENVER BY 2 PM. TAKE COVER IF THREATENING WEATHER APPROACHES...AND MONITOR NOAA WEATHER RADIO FOR POSSIBLE HWARNINGS. DULONG
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 1:10 PM MDT | Tornado Warning | BOU | Douglas | 20 min |
| Jun 18, 1:52 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe, Denver | 53 min |
| Jun 18, 2:05 PM MDT | Severe Thunderstorm Warning | BOU | Adams | 40 min |
| Jun 18, 2:32 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Weld | 43 min |
| Jun 18, 2:44 PM MDT | Tornado Warning | BOU | Weld | 26 min |
| Jun 18, 2:45 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Denver | 45 min |
| Jun 18, 2:51 PM MDT | Severe Thunderstorm Warning | BOU | Denver, Jefferson | 24 min |
| Jun 18, 3:10 PM MDT | Severe Thunderstorm Warning | BOU | Denver, Jefferson | 35 min |
| Jun 18, 3:24 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe | 36 min |
| Jun 18, 3:36 PM MDT | Severe Thunderstorm Warning | BOU | Boulder | 24 min |
| Jun 18, 4:00 PM MDT | Severe Thunderstorm Warning | BOU | Boulder | 30 min |
| Jun 18, 4:29 PM MDT | Severe Thunderstorm Warning | BOU | Boulder | 31 min |
| Jun 18, 5:00 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Morgan, Washington | 30 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.