Alert archive / Wyoming / Severe Thunderstorm Warnings in 2014
Severe Thunderstorm Warning 21, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at May 20, 2014, 2:53 PM MDT for Converse County, Wyoming. It was in force for 52 min. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 20, 2014, 2:53 PM MDT (20:53 UTC)
- Expired
- May 20, 2014, 3:45 PM MDT
- In force
- 52 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Converse County, WY
The radar
The Cheyenne radar (KCYS), 189 km from the middle of the area, began a volume at 20:54 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 20, 3:14 PM MDT | HAIL 1 | 7 Sw Douglas, WY | ALL HAIL, NO RAIN. |
| May 20, 3:20 PM MDT | HAIL 0.5 | 3 Sw Douglas, WY | HAIL COVERS THE GROUND |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 20, 2:31 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Riverton, WY (KRIW), launched 12:00Z, 8.9 hours before the alert went out and 242 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
- 1701 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 102 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
887
WUUS55 KCYS 202053
SVRCYS
WYC009-202145-
/O.NEW.KCYS.SV.W.0021.140520T2053Z-140520T2145Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
253 PM MDT TUE MAY 20 2014
THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CENTRAL CONVERSE COUNTY IN EAST CENTRAL WYOMING...
* UNTIL 345 PM MDT
* AT 249 PM MDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR LAPRELE
RESERVOIR...AND MOVING EAST AT 15 MPH.
HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL.
SOURCE...RADAR INDICATED.
IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO
ROOFS...SIDING AND TREES.
* LOCATIONS IMPACTED INCLUDE...
DOUGLAS.
THIS INCLUDES INTERSTATE 25 IN WYOMING BETWEEN MILEPOSTS 129 AND 150.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN
CHEYENNE.
TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS!
&&
LAT...LON 4293 10539 4268 10518 4264 10560 4274 10569
TIME...MOT...LOC 2053Z 251DEG 14KT 4273 10554
HAIL...1.00IN
WIND...60MPH
$$
CLAYCOMB3 follow-up statements
530
WWUS55 KCYS 202112
SVSCYS
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
312 PM MDT TUE MAY 20 2014
WYC009-202145-
/O.CON.KCYS.SV.W.0021.000000T0000Z-140520T2145Z/
CONVERSE WY-
312 PM MDT TUE MAY 20 2014
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL
CONVERSE COUNTY UNTIL 345 PM MDT...
AT 311 PM MDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR DOUGLAS...AND
MOVING EAST AT 15 MPH.
HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL.
SOURCE...RADAR INDICATED.
IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO
ROOFS...SIDING AND TREES.
LOCATIONS IMPACTED INCLUDE...
DOUGLAS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN
CHEYENNE.
TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS!
&&
LAT...LON 4291 10538 4268 10518 4266 10550 4276 10558
TIME...MOT...LOC 2113Z 251DEG 14KT 4275 10544
HAIL...1.00IN
WIND...60MPH
$$
CLAYCOMB044 WWUS55 KCYS 202124 SVSCYS SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 324 PM MDT TUE MAY 20 2014 WYC009-202145- /O.CON.KCYS.SV.W.0021.000000T0000Z-140520T2145Z/ CONVERSE WY- 324 PM MDT TUE MAY 20 2014 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR CENTRAL CONVERSE COUNTY UNTIL 345 PM MDT... AT 322 PM MDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR DOUGLAS...AND MOVING EAST AT 15 MPH. HAZARD...QUARTER SIZE HAIL. SOURCE...RADAR INDICATED. IMPACT...DAMAGE TO VEHICLES IS EXPECTED. LOCATIONS IMPACTED INCLUDE... MAINLY RURAL AREAS OF CENTRAL CONVERSE COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A BUILDING. TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY. THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN CHEYENNE. && LAT...LON 4291 10538 4271 10521 4269 10527 4280 10547 TIME...MOT...LOC 2124Z 254DEG 37KT 4278 10532 HAIL...1.00IN WIND...<50MPH $$ CLAYCOMB
625 WWUS55 KCYS 202132 SVSCYS SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 332 PM MDT TUE MAY 20 2014 WYC009-202142- /O.CAN.KCYS.SV.W.0021.000000T0000Z-140520T2145Z/ CONVERSE WY- 332 PM MDT TUE MAY 20 2014 ...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL CONVERSE COUNTY IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY. ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 9 PM THIS EVENING. LAT...LON 4291 10538 4271 10521 4269 10527 4280 10547 TIME...MOT...LOC 2132Z 254DEG 37KT 4280 10521 $$ CLAYCOMB
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 6:12 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 63 min |
| May 19, 6:54 PM MDT | Special Weather Statement | CYS | Laramie | 51 min |
| May 20, 1:31 PM MDT | Special Weather Statement | CYS | Converse | 59 min |
| May 20, 1:41 PM MDT | Special Weather Statement | CYS | Platte | 64 min |
| May 20, 1:50 PM MDT | Severe Thunderstorm Warning | CYS | Platte | 40 min |
| May 20, 2:30 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Platte | 45 min |
| May 20, 2:33 PM MDT | Special Weather Statement | CYS | Converse | 57 min |
| May 20, 2:54 PM MDT | Special Weather Statement | CYS | Platte | 66 min |
| May 20, 3:17 PM MDT | Special Weather Statement | CYS | Goshen | 58 min |
| May 20, 3:52 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 38 min |
| May 20, 4:33 PM MDT | Special Weather Statement | CYS | Goshen | 57 min |
| May 20, 4:45 PM MDT | Special Weather Statement | CYS | Converse | 60 min |
| May 20, 4:47 PM MDT | Special Weather Statement | CYS | Goshen | 58 min |
| May 20, 5:00 PM MDT | Flash Flood Warning | CYS | Goshen | 6 hr |
Nearby
Severe Thunderstorm Warnings in Wyoming, 2014Every severe thunderstorm warning in 2014
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.