Alert archive / Colorado / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 13, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 6, 2009, 8:18 PM MDT for Sedgwick County, Colorado. It was in force for 42 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jun 6, 2009, 8:18 PM MDT (02:18 UTC)
- Expired
- Jun 6, 2009, 9:00 PM MDT
- In force
- 42 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
County Sedgwick County, CO
The radar
The Goodland radar (KGLD), 176 km from the middle of the area, began a volume at 02:15 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
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 2.3 hours before the alert went out and 137 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
- 63 J/kg
- Mixed-layer CIN
- -295 J/kg
- Mixed-layer LCL
- 2465 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- -6 m²/s²
- 0-3 km storm-relative helicity
- 242 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS55 KBOU 070218 SVRBOU COC115-070300- /O.NEW.KBOU.SV.W.0013.090607T0218Z-090607T0300Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DENVER CO 818 PM MDT SAT JUN 6 2009 THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN SEDGWICK COUNTY IN NORTHEAST COLORADO * UNTIL 900 PM MDT * AT 818 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 5 MILES SOUTHEAST OF OVID...OR 6 MILES SOUTHWEST OF JULESBURG...MOVING EAST AT 15 MPH. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO OVID AND JULESBURG. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED. IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. REMEMBER...A SEVERE THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS IN EXCESS OF 58 MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN. && LAT...LON 4100 10206 4077 10206 4076 10245 4100 10237 TIME...MOT...LOC 0218Z 297DEG 7KT 4090 10232 $$
3 follow-up statements
000 WWUS55 KBOU 070228 SVSBOU SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 828 PM MDT SAT JUN 6 2009 COC115-070300- /O.CON.KBOU.SV.W.0013.000000T0000Z-090607T0300Z/ SEDGWICK CO- 828 PM MDT SAT JUN 6 2009 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM MDT FOR EASTERN SEDGWICK COUNTY... AT 828 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 6 MILES SOUTH OF JULESBURG...MOVING EAST AT 20 MPH. LOCATIONS REMAINING IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO JULESBURG. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED. IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. REMEMBER...A SEVERE THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS IN EXCESS OF 58 MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN. && LAT...LON 4100 10206 4077 10206 4076 10245 4100 10237 TIME...MOT...LOC 0228Z 280DEG 8KT 4091 10228 $$
000 WWUS55 KBOU 070244 SVSBOU SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 844 PM MDT SAT JUN 6 2009 COC115-070300- /O.CON.KBOU.SV.W.0013.000000T0000Z-090607T0300Z/ SEDGWICK CO- 844 PM MDT SAT JUN 6 2009 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM MDT FOR EASTERN SEDGWICK COUNTY... AT 845 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 10 MILES SOUTHEAST OF JULESBURG...MOVING EAST AT 20 MPH. LOCATIONS REMAINING IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO JULESBURG. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED. IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. REMEMBER...A SEVERE THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS IN EXCESS OF 58 MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN. && LAT...LON 4100 10206 4077 10206 4076 10245 4100 10237 TIME...MOT...LOC 0245Z 280DEG 8KT 4090 10211 $$
000 WWUS55 KBOU 070259 SVSBOU SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 859 PM MDT SAT JUN 6 2009 COC115-070309- /O.EXP.KBOU.SV.W.0013.000000T0000Z-090607T0300Z/ SEDGWICK CO- 859 PM MDT SAT JUN 6 2009 ...THE SEVERE THUNDERSTORM WARNING FOR EASTERN SEDGWICK COUNTY WILL EXPIRE AT 900 PM MDT... THE THUNDERSTORM THAT PROMPTED THE WARNING HAS EXITED THE AREA. LAT...LON 4100 10206 4077 10206 4076 10245 4100 10237 TIME...MOT...LOC 0259Z 280DEG 8KT 4089 10203 $$
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 6, 7:48 PM MDT | Special Weather Statement | BOU | Sedgwick | 27 min |
| Jun 6, 11:27 PM MDT | Severe Thunderstorm Warning | BOU | Logan | 48 min |
| Jun 7, 12:08 AM MDT | Severe Thunderstorm Warning | BOU | Logan, Sedgwick | 38 min |
| Jun 7, 12:01 PM MDT | Severe Thunderstorm Warning | BOU | Larimer, Weld | 59 min |
| Jun 7, 12:55 PM MDT | Areal Flood Advisory | BOU | Larimer, Weld | 55 min |
| Jun 7, 1:16 PM MDT | Tornado Warning | BOU | Adams, Broomfield, Weld | 19 min |
| Jun 7, 1:28 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe, Denver | 62 min |
| Jun 7, 1:40 PM MDT | Tornado Warning | BOU | Arapahoe, Denver | 35 min |
| Jun 7, 1:53 PM MDT | Tornado Warning | BOU | Arapahoe, Douglas, Elbert | 37 min |
| Jun 7, 2:12 PM MDT | Severe Thunderstorm Warning | BOU | Boulder, Larimer, Weld | 20 min |
| Jun 7, 2:24 PM MDT | Tornado Warning | BOU | Arapahoe, Elbert | 51 min |
| Jun 7, 3:12 PM MDT | Tornado Warning | BOU | Arapahoe, Elbert | 33 min |
| Jun 7, 3:24 PM MDT | Tornado Warning | BOU | Adams | 31 min |
| Jun 7, 3:43 PM MDT | Tornado Warning | BOU | Lincoln, Washington | 47 min |
| Jun 7, 4:05 PM MDT | Tornado Warning | BOU | Washington | 40 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 2009Every severe thunderstorm warning in 2009
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.