Alert archive / Colorado / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 8, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Apr 25, 1994, 1:47 PM MDT for Arapahoe County, Washington County, Colorado. It was in force for 43 min.
The area
The counties it named.
The facts
- Issued
- Apr 25, 1994, 1:47 PM MDT (19:47 UTC)
- Expired
- Apr 25, 1994, 2:30 PM MDT
- In force
- 43 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
Counties Arapahoe County, CO, Washington County, CO
The radar
The Denver radar (KFTG), 66 km from the middle of the area, began a volume at 19:49 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, 7.8 hours before the alert went out and 47 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
- 1386 m above ground
- 0-6 km bulk shear
- 66 kt
- 0-1 km storm-relative helicity
- -16 m²/s²
- 0-3 km storm-relative helicity
- 67 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, Apr 25, 8:05 AM MDT, 5 hours 42 minutes before
COZ038-042>043-251500- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 805 AM MDT MON APR 25 1994 ...THUNDERSTORMS ALONG THE FRONT RANGE... AT 750 AM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS ALONG THE FRONT RANGE. THE STRONGEST THUNDERSTORM WAS NEAR BERTHOUD IN LARIMER COUNTY...OR 19 MILES SOUTH OF FORT COLLINS. OTHER STORMS WERE IN DOUGLAS COUNTY NEAR SEDALIA...OR 20 MILES SOUTH OF DENVER AND JUST WEST OF GOLDEN IN JEFFERSON COUNTY. THE STORMS WERE MOVING NORTH NORTHWEST AT 20 MPH. WEATHER SPOTTERS AT 745 AM REPORTED PEA SIZE HAIL PARTIALLY COVERING THE GROUND IN BERTHOUD. PEA SIZE HAIL WAS ALSO REPORTED IN GOLDEN. PEOPLE ALONG THE FRONT RANGE...INCLUDING FORT COLLINS...LOVELAND... DENVER AND BOULDER SHOULD BE ALERT FOR GUSTY WINDS...SMALL HAIL AND FREQUENT LIGHTNING. LESZCYNSKI
Special weather statement, Apr 25, 10:47 AM MDT, 3 hours before
COZALL-251730- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 1045 AM MDT MON APR 25 1994 ...EARLY SEASON THUNDERSTORMS IN NORTHEAST COLORADO... ALL SEVERE THUNDERSTORM WARNINGS HAVE EXPIRED BUT LIGHT TO MODERATE INTENSITY THUNDERSTORMS CONTINUE TO RUMBLE ALONG THE FRONT RANGE AND ADJACENT PLAINS THIS MORNING. THESE THUNDERSTORMS WILL PRODUCE LOCALLY HEAVY RAIN AND SMALL HAIL THROUGH MIDDAY AND POSSIBLY THROUGH THE AFTERNOON. SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP OVER THE REST OF NORTHEAST COLORADO AS THE DAY PROGRESSES. LOCALLY HEAVY RAIN FROM SOME OF THE THUNDERSTORMS COULD CAUSE LOCAL FLOODING OF STREETS...UNDERPASSES AND LOW LYING AREAS. SMALL STREAMS... CREEKS AND CANALS MAY HAVE WATER LEVELS RISE TO NEAR BANKFULL STAGE. THE AREA MOST PRONE TO HEAVY RAIN WILL BE THE FOOTHILLS AND THE PLAINS AREAS BETWEEN THE FOOTHILLS AND I-25. ALL PERSONS IN NORTHEAST COLORADO AND THE FRONT RANGE FOOTHILLS EAST OF THE CONTINENTAL DIVIDE SHOULD STAY ABREAST OF THE LATEST WEATHER FORECASTS AND BE ALERT FOR LATER WEATHER BULLETINS. BOODA
Special weather statement, Apr 25, 11:57 AM MDT, 1 hour 50 minutes before
COZ015-030>045-048>050-260700- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 1200 PM MDT MON APR 25 1994 THIS UPDATED OUTLOOK PERTAINS TO THE FOLLOWING COLORADO COUNTIES ADAMS DENVER JACKSON LOGAN SEDGWICK ARAPAHOE DOUGLAS JEFFERSON MORGAN SUMMIT BOULDER GILPIN LARIMER PARK WASHINGTON CLEAR CREEK GRAND LAKE PHILLIPS WELD ...SNOW ADVISORY MOUNTAINS AND FRONT RANGE FOOTHILLS NORTH OF DENVER THIS AFTERNOON... AN EARLY SPRING STORM WILL SPREAD PRECIPITATION ACROSS NORTHEAST AND NORTH CENTRAL COLORADO THIS AFTERNOON AND EVENING. OVER THE MOUNTAINS AND FRONT RANGE FOOTHILLS NORTH OF DENVER ADDITIONAL SNOW ACCUMULATIONS OF 4 TO 7 INCHES ARE POSSIBLE THIS AFTERNOON. LESSER AMOUNTS OF SNOW ARE POSSIBLE IN THE FOOTHILLS SOUTHWEST OF DENVER. LIGHT SNOW WILL CONTINUE THROUGH THE EVENING HOURS WITH SOME ADDITIONAL ACCUMULATIONS. OVER THE NORTHEASTERN HIGH PLAINS LOW LEVEL UPSLOPE FLOW HAS DEVELOPED WITH EMBEDDED SHOWERS AND THUNDERSTORMS. A FEW OF THESE THUNDERSTORMS MAY BE SEVERE WITH LARGE HAIL AND STRONG GUSTY WINDS THIS AFTERNOON AND EARLY EVENING. LOCALLY HEAVY RAIN OF UP TO AN INCH IS POSSIBLE FROM THESE THUNDERSTORMS. SHOWERS AND THUNDERSTORMS WILL DECREASE DURING THE LATE EVENING HOURS WITH OCCASIONAL RAIN BECOMING MIXED WITH SNOW NEAR THE FOOTHILLS. GARD...WSFO DENVER
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 25, 8:18 AM MDT | Severe Thunderstorm Warning | BOU | Boulder, Jefferson | 27 min |
| Apr 25, 8:18 AM MDT | Severe Thunderstorm Warning | BOU | Adams, Denver | 27 min |
| Apr 25, 8:32 AM MDT | Severe Thunderstorm Warning | BOU | Larimer, Weld | 28 min |
| Apr 25, 8:49 AM MDT | Severe Thunderstorm Warning | BOU | Adams, Denver, Jefferson | 41 min |
| Apr 25, 8:49 AM MDT | Severe Thunderstorm Warning | BOU | Boulder, Weld | 41 min |
| Apr 25, 9:03 AM MDT | Severe Thunderstorm Warning | BOU | Larimer, Weld | 42 min |
| Apr 25, 9:45 AM MDT | Severe Thunderstorm Warning | BOU | Weld | 30 min |
| Apr 25, 2:20 PM MDT | Tornado Warning | BOU | Washington | 25 min |
| Apr 25, 2:45 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 25 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.