Alert archive / Colorado / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 104, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jul 21, 1993, 4:53 PM MDT for Weld County, Colorado. It was in force for 37 min.
The area
The counties it named.
The facts
- Issued
- Jul 21, 1993, 4:53 PM MDT (22:53 UTC)
- Expired
- Jul 21, 1993, 5:30 PM MDT
- In force
- 37 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
County Weld County, CO
The nearest sounding before it
Denver, CO (KDEN), launched 12:00Z, 10.9 hours before the alert went out and 125 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3152 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 46 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, Jul 21, 2:16 PM MDT, 2 hours 37 minutes before
COZ011-212130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 220 PM MDT WED JUL 21 1993 ...DOWNBURST TYPE WINDS TO OCCUR ALONG THE FRONT RANGE... A FEW THUNDERSTORMS ARE EXPECTED TO DEVELOP IN AND ALONG THE FRONT RANGE OF COLORADO THIS AFTERNOON. SINCE THE LOWER LEVELS OF THE ATMOSPHERE ARE RATHER DRY...LITTLE RAINFALL IS EXPECTED WITH THESE STORMS AS IT WILL EVAPORATE BEFORE REACHING THE GROUND. HOWEVER WHEN THE RAIN EVAPORATES...THE AIR MOVING DOWN IN ASSOCIATION WITH THE RAIN DOESN'T STOP SO IT CAUSES A WEATHER PHENEMENA THAT ARE CALLED DOWNBURSTS. THE MAIN THREAT FROM THE STORMS ALONG THE FRONT RANGE THIS AFTERNOON WILL BE THE STRONG DOWNBURST TYPE WINDS. WINDS COULD GUSTS AS HIGH AS 50 TO 60 MPH THROUGHOUT THE AFTERNOON WHEN CLOSE TO A THUNDERSTORM. IF YOU LIVE ALONG THE FRONT RANGE OR IN THE FOOTHILLS...BE AWARE OF THE POTENTIAL OF STRONG WINDS AND MOVE ANY LOOSE OUTDOOR OBJECTS INDOORS. CONTINUE TO MONITOR NOAA WEATHER RADIO...COMMERCIAL RADIO...AND/OR TELEVISION FOR FURTHER UPDATES ON THE DOWNBURST POTENTIAL. HEITKAMP
Special weather statement, Jul 21, 2:20 PM MDT, 2 hours 33 minutes before
COZ011-212130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 220 PM MDT WED JUL 21 1993 ...DOWNBURST TYPE WINDS TO OCCUR ALONG THE FRONT RANGE... A FEW THUNDERSTORMS ARE EXPECTED TO DEVELOP IN AND ALONG THE FRONT RANGE OF COLORADO THIS AFTERNOON. SINCE THE LOWER LEVELS OF THE ATMOSPHERE ARE RATHER DRY...LITTLE RAINFALL IS EXPECTED WITH THESE STORMS AS IT WILL EVAPORATE BEFORE REACHING THE GROUND. HOWEVER WHEN THE RAIN EVAPORATES...THE AIR MOVING DOWN IN ASSOCIATION WITH THE RAIN DOESN'T STOP SO IT CAUSES A WEATHER PHENEMENA THAT ARE CALLED DOWNBURSTS. THE MAIN THREAT FROM THE STORMS ALONG THE FRONT RANGE THIS AFTERNOON WILL BE THE STRONG DOWNBURST TYPE WINDS. WINDS COULD GUSTS AS HIGH AS 50 TO 60 MPH THROUGHOUT THE AFTERNOON WHEN CLOSE TO A THUNDERSTORM. IF YOU LIVE ALONG THE FRONT RANGE OR IN THE FOOTHILLS...BE AWARE OF THE POTENTIAL OF STRONG WINDS AND MOVE ANY LOOSE OUTDOOR OBJECTS INDOORS. CONTINUE TO MONITOR NOAA WEATHER RADIO...COMMERCIAL RADIO...AND/OR TELEVISION FOR FURTHER UPDATES ON THE DOWNBURST POTENTIAL. HEITKAMP
Special weather statement, Jul 21, 3:40 PM MDT, 1 hour 13 minutes before
COZ011-012-212215- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 340 PM MDT WED JUL 21 1993 ...THUNDERSTORMS DEVELOPING ACROSS PORTIONS OF NORTHEAST COLORADO... AT 340 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED THUNDERSTORMS DEVELOPING ACROSS PORTIONS OF NORTHEAST COLORADO. THE STRONGEST STORM WAS LOCATED NEAR THE TOWN OF BYERS OR 30 MILES NORTHWEST OF LIMON. BRIEF HEAVY RAIN...FREQUENT LIGHTNING...AND SMALL HAIL ARE POSSIBLE WITH THIS STORM AND WITH THE OTHER STORMS ACROSS THE REMAINDER OF NORTHEAST COLORADO. CONTINUE TO MONITOR NOAA WEATHER RADIO...COMMERCIAL RADIO...AND/OR TELEVISION FOR FURTHER UPDATES ON THE WEATHER SITUATION ACROSS NORTHEAST COLORADO. HEITKAMP
Special weather statement, Jul 21, 3:40 PM MDT, 1 hour 13 minutes before
COZ011-012-212215- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 340 PM MDT WED JUL 21 1993 ...THUNDERSTORMS DEVELOPING ACROSS PORTIONS OF NORTHEAST COLORADO... AT 340 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED THUNDERSTORMS DEVELOPING ACROSS PORTIONS OF NORTHEAST COLORADO. THE STRONGEST STORM WAS LOCATED NEAR THE TOWN OF BYERS OR 30 MILES NORTHWEST OF LIMON. BRIEF HEAVY RAIN...FREQUENT LIGHTNING...AND SMALL HAIL ARE POSSIBLE WITH THIS STORM AND WITH THE OTHER STORMS ACROSS THE REMAINDER OF NORTHEAST COLORADO. CONTINUE TO MONITOR NOAA WEATHER RADIO...COMMERCIAL RADIO...AND/OR TELEVISION FOR FURTHER UPDATES ON THE WEATHER SITUATION ACROSS NORTHEAST COLORADO. HEITKAMP
Special weather statement, Jul 21, 4:38 PM MDT, 15 minutes before
COZ011-012-013-212330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 438 PM MDT WED JUL 21 1993 ...THUNDERSTORMS CONTINUING OVER NORTHEAST COLORADO... NATIONAL WEATHER SERVICE DOPPLER RADAR AT 429 PM INDICATED A LINE OF STRONG THUNDERSTORMS OVER WELD COUNTY FROM GROVER TO NEAR FORT LUPTON... INTO NORTH CENTRAL ADAMS COUNTY ABOUT 5 MILES EAST OF BRIGHTON. ANOTHER STRONG THUNDERSTORM WAS NOTED IN SOUTHWEST DOUGLAS COUNTY. THE STORMS ARE MOVING NORTHEAST AT 20 MILES AN HOUR. THESE STORMS ARE CAPABLE OF PRODUCING HAIL AND STRONG GUSTY WINDS. IF THREATENING WEATHER APPROACHES YOUR LOCATIONS...MOVE INDOORS TO A PLACE OF SAFETY. CONTINUE TO MONITOR NOAA WEATHER RADIO...COMMERCIAL RADIO...AND/OR TELEVISION FOR FURTHER UPDATES ON THE WEATHER SITUATION ACROSS NORTHEAST COLORADO. REMEMBER...A TORNADO WATCH REMAINS IN EFFECT FOR MUCH OF EASTERN COLORADO UNTIL 1100 PM MDT. WOLF
Special weather statement, Jul 21, 4:38 PM MDT, 15 minutes before
COZ011-012-013-212330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 438 PM MDT WED JUL 21 1993 ...THUNDERSTORMS CONTINUING OVER NORTHEAST COLORADO... NATIONAL WEATHER SERVICE DOPPLER RADAR AT 429 PM INDICATED A LINE OF STRONG THUNDERSTORMS OVER WELD COUNTY FROM GROVER TO NEAR FORT LUPTON... INTO NORTH CENTRAL ADAMS COUNTY ABOUT 5 MILES EAST OF BRIGHTON. ANOTHER STRONG THUNDERSTORM WAS NOTED IN SOUTHWEST DOUGLAS COUNTY. THE STORMS ARE MOVING NORTHEAST AT 20 MILES AN HOUR. THESE STORMS ARE CAPABLE OF PRODUCING HAIL AND STRONG GUSTY WINDS. IF THREATENING WEATHER APPROACHES YOUR LOCATIONS...MOVE INDOORS TO A PLACE OF SAFETY. CONTINUE TO MONITOR NOAA WEATHER RADIO...COMMERCIAL RADIO...AND/OR TELEVISION FOR FURTHER UPDATES ON THE WEATHER SITUATION ACROSS NORTHEAST COLORADO. REMEMBER...A TORNADO WATCH REMAINS IN EFFECT FOR MUCH OF EASTERN COLORADO UNTIL 1100 PM MDT. WOLF
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 2:46 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe | 12 min |
| Jul 21, 2:46 PM MDT | Severe Thunderstorm Warning | BOU | Adams | 29 min |
| Jul 21, 3:47 PM MDT | Severe Thunderstorm Warning | BOU | Adams | 28 min |
| Jul 21, 4:16 PM MDT | Severe Thunderstorm Warning | BOU | Adams | 29 min |
| Jul 21, 4:47 PM MDT | Severe Thunderstorm Warning | BOU | Adams | 28 min |
| Jul 21, 4:55 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 23 min |
| Jul 21, 5:04 PM MDT | Tornado Warning | BOU | Adams, Washington | 26 min |
| Jul 21, 5:30 PM MDT | Tornado Warning | BOU | Washington | 30 min |
| Jul 21, 5:37 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 30 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 1993Every severe thunderstorm warning in 1993
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.