Alert archive / Colorado / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 101, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jul 21, 1993, 3:47 PM MDT for Adams County, Colorado. It was in force for 28 min.
The area
The counties it named.
The facts
- Issued
- Jul 21, 1993, 3:47 PM MDT (21:47 UTC)
- Expired
- Jul 21, 1993, 4:15 PM MDT
- In force
- 28 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
County Adams County, CO
The nearest sounding before it
Denver, CO (KDEN), launched 12:00Z, 9.8 hours before the alert went out and 95 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
As transmitted, in the capitals the NWS used until 2016.
000
WUUS1 KDEN 212148
SVRBOU
COC001-212215-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
347 PM MDT WED JUL 21 1993
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A SEVERE
THUNDERSTORM WARNING EFFECTIVE UNTIL 415 PM MDT FOR PEOPLE IN
THE FOLLOWING COUNTIES:
IN NORTHEASTERN COLORADO
EASTERN ADAMS
INCLUDING THE FOLLOWING LOCATIONS
LEADER AND SHAMROCK
AT 347 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A SEVERE THUNDERSTORM 7 MILES SOUTHWEST OF LEADER...OR ABOUT
45 MILES NORTHWEST OF LIMON.
THE STORM WAS MOVING NORTHEAST AT 30 MPH. LARGE HAIL UP TO ONE
INCH DIAMETER CAN BE EXPECTED WITH THIS STORM.
TO REPORT SEVERE WEATHER HAVE THE NEAREST LAW ENFORCEMENT
AGENCY RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
FORECAST OFFICE IN DENVER.
HEITKAMP
LAT...LON 3992 10372 3975 10411 3983 10423 4000 10397What 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, 1:20 PM MDT, 2 hours 27 minutes before
COZ012-211945- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 120 PM MDT WED JUL 21 1993 ...STRONG THUNDERSTORM IN NORTHEAST ARAPAHOE COUNTY... AT 120 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 15 MILES NORTHEAST OF DEER TRAIL...OR 36 MILES NORTHWEST OF LIMON. THIS THUNDERSTORM WAS MOVING NORTHEAST AT 15 TO 25 MPH AND WILL BE MOVING INTO SOUTHEAST ADAMS COUNTY BY 130 PM MDT. HEAVY RAIN...FREQUENT LIGHTNING...AND POSSIBLY SOME SMALL HAIL WILL BE POSSIBLE WITH THIS STORM. BE ON THE LOOKOUT FOR THIS STORM IF YOU LIVE IN NORTHEAST ARAPAHOE OR SOUTHEAST ADAMS COUNTIES. PROTECT YOURSELF FROM THE LIGHTNING THAT OCCURS BY GETTING INDOORS BEFORE THE STORM APPROACHES. CONTINUE TO LISTEN TO NOAA WEATHER RADIO OR LOCAL MEDIA FOR FURTHER UPDATES. HEITKAMP WWUS35KBTV ,M
Special weather statement, Jul 21, 1:23 PM MDT, 2 hours 24 minutes before
COZ012-211945- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 120 PM MDT WED JUL 21 1993 ...STRONG THUNDERSTORM IN NORTHEAST ARAPAHOE COUNTY... AT 120 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 15 MILES NORTHEAST OF DEER TRAIL...OR 36 MILES NORTHWEST OF LIMON. THIS THUNDERSTORM WAS MOVING NORTHEAST AT 15 TO 25 MPH AND WILL BE MOVING INTO SOUTHEAST ADAMS COUNTY BY 130 PM MDT. HEAVY RAIN...FREQUENT LIGHTNING...AND POSSIBLY SOME SMALL HAIL WILL BE POSSIBLE WITH THIS STORM. BE ON THE LOOKOUT FOR THIS STORM IF YOU LIVE IN NORTHEAST ARAPAHOE OR SOUTHEAST ADAMS COUNTIES. PROTECT YOURSELF FROM THE LIGHTNING THAT OCCURS BY GETTING INDOORS BEFORE THE STORM APPROACHES. CONTINUE TO LISTEN TO NOAA WEATHER RADIO OR LOCAL MEDIA FOR FURTHER UPDATES. HEITKAMP
Special weather statement, Jul 21, 2:16 PM MDT, 1 hour 31 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, 1 hour 27 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, 7 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, 7 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
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, 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, 4:53 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 37 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.