Alert archive / Colorado / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 13, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 14, 1986, 7:46 PM MDT for Logan County, Phillips County, Sedgwick County, Colorado. It was in force for 59 min.
The area
The counties it named.
The facts
- Issued
- Jun 14, 1986, 7:46 PM MDT (01:46 UTC)
- Expired
- Jun 14, 1986, 8:45 PM MDT
- In force
- 59 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
Counties Logan County, CO, Phillips County, CO, Sedgwick County, CO
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Denver, CO (KDEN), launched 00:00Z, 1.8 hours before the alert went out and 109 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
- 107 J/kg
- Mixed-layer CIN
- -64 J/kg
- Mixed-layer LCL
- 2693 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 55 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KDEN 150146 SVRDEN COC075-095-115-150245- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DENVER CO 746 PM MDT SAT JUN 14 1986 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 845 PM MDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF NORTHEAST COLORADO...EASTERN LOGAN...NORTHERN PHILLIPS AND SOUTHERN SEDGWICK THIS WARNING INCLUDES THE FOLLOWING TOWNS AND CITIES... HAXTON AND FLEMING AT 735PM MDT RADAR INDICATED A SEVERE THUNDERSTORM 10 MILES NORTHEAST OF STERLING COLORADO. THIS THUNDERSTORM IS MOVING TO THE EAST ABOUT 25 MPH. THIS THUNDERSTORM HAS PRODUCED MARBLE SIZE HAIL 15 MILES NORTH OF STERLING COLORADO AND AROUND 530PM MDT IT HAD DROPPED MARBLE SIZED HAIL AT JACKSON LAKE IN NORTHWEST LOGAN COUNTY. REMEMBER...A SEVERE THUNDERSTORM CAN PRODUCE LARGE HAIL...DAMAGING WINDS OF OVER 60 MPH...DEADLY LIGHTNING...AND HEAVY RAINS THAT CAN QUICKLY FLOOD A LOW LYING AREA. TO REPORT SEVERE WEATHER HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY YOUR REPORTS TO THE NATIONAL WEATHER SERVICE IN DENVER...OR CALL YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN DENVER AT 361-0663. DO NOT CALL THIS NUMBE2R FOR INFORMATION. FRANSON...WSFO DENVER
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 14, 1:51 PM MDT, 5 hours 55 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 155 PM MDT SAT JUN 14 1986 ...VERY HEAVY THUNDERSTORM MOVING INTO ELBERT COUNTY... AT 145 PM MDT WEATHER RADAR INDICATED A VERY HEAVY THUNDERSTORM IN EXTREME NORTHEAST DOUGLAS COUNTY JUST EAST OF PARKER. THE STORM IS MOVING TO THE EAST AT ABOUT 15 MILES PER HOUR AND SHOULD BE IN NORTHWEST ELBERT COUNTY IN ABOUT 10 TO 15 MINUTES. THE STORM APPEARS TO BE TRACKING TO THE NORTH OF THE TOWNS OF ELIZABETH AND KIOWA. HEAVY RAIN..HAIL..GUSTY WINDS AND LIGHTNING WILL ACCOMPANY THE STORM. PERSONS IN THE PATH OF THE STORM SHOULD KEEP AN EYE ON THE WEATHER AND IF THREATENING CONDITIONS DEVELOP SHOULD SEEK SAFE SHELTER IMMEDIATELY. OTSHER THUNDERSTORMS ARE DEVELOPING ALONG THE FRONT RANGE AT THIS HOUR SO STAY TUNED TO NOAA WEATHER RADIO OR COMMERCIAL BROADCASTS FOR THE LATEST INFORMATION. THALER
Special weather statement, Jun 14, 2:27 PM MDT, 5 hours 19 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 230 PM MDT SAT JUN 14 1986 ...VERY HEAVY THUNDERSTORM MOVES INTO SOUTHERN ARAPAHOE COUNTY... AT 215 PM MDT WEATHER RADAR INDICATED A VERY HEAVY THUNDERSTORM IN SOUTH CENTRAL ARAPAHOE COUNTY SOUTHWEST OF BENNETT. THE STORM IS MOVING TO THE EAST AT ABOUT 15 MILES PER HOUR BUT IS ALSO SHOWING SIGNS OF DEVELOPING TO THE NORTH. PERSONS IN CENTRAL AND SOUTH CENTRAL ARAPAHOE COUNTY INCLUDING RESIDENTS OF THE TOWNS OF BENNETT.. STRASBURG AND BYERS SHOULD KEEP AN EYE ON THE WEATHER AND IF THREATENING WEATHER APPROACHES SHOULD SEEK A PLACE OF SAFETY IMMEDIATELY. HEAVY RAIN..HAIL..STRONG GUSTY WINDS AND LIGHTNING WILL ACCOMPANY THE STORM. ANOTHER VERY HEAVY THUNDERSTORM IS LOCATED IN WESTERN ELBERT COUNTY NEAR THE TOWN OF ELIZABETH. THIS STORM TOO IS MOVING TO THE EAST AT AROUND 15 MILES PER HOUR AND IS HEADING TOWARD KIOWA. THALER
Special weather statement, Jun 14, 6:12 PM MDT, 1 hour 34 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 605 PM MDT SAT JUN 14 1986 ...STRONG THUNDERSTORM SOUTH OF DENVER NEAR CASTLE ROCK... ALL PERSONS IN EASTERN DOUGLAS COUNTY NEAR CASTLE ROCK AND FRANKTOWN SHOULD BE ALERT FOR LIGHTNING...VERY STRONG GUSTY WINDS... POSSIBLE HAIL AND HEAVY RAIN FROM A STRONG THUNDERSTORM UNTIL 630 PM MDT THIS EVENING. AT 600 PM MDT RADAR INDICATED A STRONG THUNDERSTORM ABOUT 3 MILES SOUTHEAST OF CASTLE ROCK. THIS STORM WAS MOVING TO THE EAST AT 10 TO 15 MPH AND WILL BE MOVING INTO WESTERN ELBERT COUNTY. GARD...WSFO DENVER
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 14, 6:52 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Morgan, Weld | 68 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 1986Every severe thunderstorm warning in 1986
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.