Alert archive / Colorado / Severe Thunderstorm Watches in 2003
Severe Thunderstorm Watch 182
The Storm Prediction Center issued this severe thunderstorm watch at Apr 29, 2003, 3:10 PM MDT for 12 counties in Colorado; 7 counties in Kansas; Dundy County, Hitchcock County, Nebraska. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 29, 2003, 3:10 PM MDT (21:10 UTC)
- Expired
- Apr 29, 2003, 9:00 PM MDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 21 counties
Adams County, CO, Arapahoe County, CO, Cheyenne County, CO, Denver County, CO, Douglas County, CO, Elbert County, CO, Kit Carson County, CO, Lincoln County, CO, Morgan County, CO, Washington County, CO, Weld County, CO, Yuma County, CO, Cheyenne County, KS, Logan County, KS, Rawlins County, KS, Scott County, KS, Sherman County, KS, Thomas County, KS, Wallace County, KS, Dundy County, NE, Hitchcock County, NE
The radar
The Denver radar (KFTG), 103 km from the middle of the area, began a volume at 21:13 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.
Warnings issued inside it
26 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 3:48 PM MDT | Severe Thunderstorm Warning | BOU | Adams | 42 min |
| Apr 29, 4:15 PM MDT | Severe Thunderstorm Warning | BOU | Douglas | 45 min |
| Apr 29, 4:28 PM MDT | Severe Thunderstorm Warning | BOU | Adams | 32 min |
| Apr 29, 4:39 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 66 min |
| Apr 29, 4:48 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 57 min |
| Apr 29, 4:54 PM MDT | Severe Thunderstorm Warning | GLD | Kit Carson | 66 min |
| Apr 29, 4:55 PM MDT | Tornado Warning | BOU | Lincoln | 50 min |
| Apr 29, 4:58 PM MDT | Severe Thunderstorm Warning | BOU | Elbert | 62 min |
| Apr 29, 5:04 PM MDT | Severe Thunderstorm Warning | BOU | Adams | 56 min |
| Apr 29, 5:11 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 64 min |
| Apr 29, 5:18 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 57 min |
| Apr 29, 5:58 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Denver, Douglas | 47 min |
| Apr 29, 5:59 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Elbert | 61 min |
| Apr 29, 5:59 PM MDT | Severe Thunderstorm Warning | GLD | Kit Carson | 61 min |
| Apr 29, 6:23 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 67 min |
| Apr 29, 6:29 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Douglas, Elbert | 46 min |
| Apr 29, 6:40 PM MDT | Severe Thunderstorm Warning | BOU | Morgan | 65 min |
| Apr 29, 6:42 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 48 min |
| Apr 29, 6:59 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe | 61 min |
| Apr 29, 7:05 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe, Denver, Douglas, Elbert | 55 min |
| Apr 29, 7:08 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe, Denver, Douglas, Elbert | 52 min |
| Apr 29, 7:16 PM MDT | Tornado Warning | BOU | Morgan | 44 min |
| Apr 29, 7:21 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Weld | 54 min |
| Apr 29, 7:32 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Elbert | 43 min |
| Apr 29, 8:00 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 60 min |
| Apr 29, 8:29 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Elbert | 46 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 9.2 hours before the alert went out and 15 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
- 44 J/kg
- Mixed-layer CIN
- -257 J/kg
- Mixed-layer LCL
- 1226 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 74 m²/s²
- 0-3 km storm-relative helicity
- 127 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 292105
SEL2
SPC WW 292110
COZ000-KSZ000-NEZ000-300300-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 182
NWS STORM PREDICTION CENTER NORMAN OK
410 PM CDT TUE APR 29 2003
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
NORTHEAST COLORADO
NORTHWEST KANSAS
SOUTHWEST NEBRASKA
EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 410 PM UNTIL
1000 PM CDT.
HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 65 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 20 MILES NORTH NORTHWEST OF DENVER
COLORADO TO 45 MILES EAST OF GOODLAND KANSAS.
REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES.
OTHER WATCH INFORMATION...CONTINUE...WW 179...WW 180...WW 181...
DISCUSSION...UPSLOPE BOUNDARY LAYER FLOW WITH MODERATE INSTABILITY
WWD TO FRONT RANGE N OF PALMER DIVIDE. THUNDERSTORMS EXPECTED TO
INCREASE OVER HIGHER TERRAIN AND MOVE INTO PLAINS. SHEAR AND
INSTABILITY SUPPORT ISOLATED SUPERCELLS WHICH WILL ENHANCE LARGE
HAIL POTENTIAL.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 25030.
...HALES
405,1050 401,1005 382,1005 390,1050SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 28, 10:50 PM MDT | Mesoscale Discussion | SPC | Yuma | 2 hr |
| Apr 29, 2:47 PM MDT | Mesoscale Discussion | SPC | Adams, Arapahoe, Denver, Elbert, Logan, Morgan and 2 more | 118 min |
| Apr 29, 5:16 PM MDT | Mesoscale Discussion | SPC | Adams, Arapahoe, Cheyenne, Denver, Douglas, Elbert and 6 more | 119 min |
| Apr 28, 6:10 PM MDT | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Butler, Chase, Chautauqua and 12 more | 2 hr |
| Apr 29, 1:15 AM MDT | Mesoscale Discussion | SPC | Decatur, Jewell, Norton, Phillips, Rawlins, Republic and 2 more | 3 hr |
| Apr 29, 1:19 PM MDT | Mesoscale Discussion | SPC | Cloud, Ellis, Ellsworth, Graham, Jewell, Lincoln and 11 more | 116 min |
| Apr 29, 2:40 PM MDT | Tornado Watch | SPC | Clay, Cloud, Decatur, Dickinson, Ellis, Ellsworth and 19 more | 5 hr |
| Apr 29, 4:52 PM MDT | Mesoscale Discussion | SPC | Clay, Cloud, Decatur, Dickinson, Ellis, Ellsworth and 19 more | 53 min |
Nearby
Severe Thunderstorm Watches in Colorado, 2003Severe Thunderstorm Watches in Kansas, 2003Severe Thunderstorm Watches in Nebraska, 2003Every severe thunderstorm watch in 2003
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.