Alert archive / Nevada / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 8, NWS Reno, NV

September 30, 2011Lyon County, Storey County, Washoe County, Nevada

NWS Reno, NV issued this severe thunderstorm warning at Sep 30, 2011, 5:00 PM PDT for Lyon County, Storey County, Washoe County, Nevada. It was in force for 45 min. 5 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: Sep 30, 2011, 5:00 PM PDT (00:00 UTC)
Expired: Sep 30, 2011, 5:45 PM PDT
In force: 45 min
Issued by: NWS Reno, NV
Area: Storm-based polygon

Counties Lyon County, NV, Storey County, NV, Washoe County, NV

The radar

The Reno radar (KRGX), 43 km from the middle of the area, began a volume at 00:03 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
Sep 30, 5:02 PM PDT	HAIL 0.75	3 N Washoe City, NV	SPOTTER REPORTED DIME SIZED HAIL AND HEAVY RAINFALL.
Sep 30, 5:20 PM PDT	TSTM WND GST 53	Reno, NV	53 MPH WIND GUST MEASURED AT RENO-TAHOE INTERNATIONAL AIRPORT.
Sep 30, 5:22 PM PDT	HAIL 0.5	2 E Mount Rose Ski Area, NV	TRAINED SPOTTER REPORTED MARBLE SIZED HAIL COVERING THE GROUND AND THE ROADWAYS ALONG SR 431 - THE MOUNT ROSE HIGHWAY. SPOTTER REPORTED NO FLOODING.
Sep 30, 5:26 PM PDT	HAIL 0.5	1 E Mount Rose Ski Area, NV	TRAINED WEATHER SPOTTER REPORTED MARBLE SIZED HAIL COVERING THE GROUND AND ROAD. SPOTTER ALSO REPORTED MINOR FLOODING.
Sep 30, 5:28 PM PDT	HAIL 0.5	1 E Mount Rose Ski Area, NV	HAIL ONE HALF INCH IN DIAMETER FELL IN THE CALLIHAN RANCH AREA UNDER A STRONG THUNDERSTORM AROUND 520 PM. GUSTY OUTFLOW WINDS WERE ALSO OBSERVED WITH THIS STORM.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Reno, NV (KREV), launched 00:00Z, 0.0 hours before the alert went out and 134 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 290 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 2960 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 87 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

896 
WUUS55 KREV 010000
SVRREV
NVC019-029-031-510-010045-
/O.NEW.KREV.SV.W.0008.111001T0000Z-111001T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE RENO NV
500 PM PDT FRI SEP 30 2011

THE NATIONAL WEATHER SERVICE IN RENO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL CARSON CITY IN WESTERN NEVADA...
  EXTREME WEST CENTRAL LYON COUNTY IN WESTERN NEVADA...
  WESTERN STOREY COUNTY IN WESTERN NEVADA...
  THIS INCLUDES THE CITY OF VIRGINIA CITY...
  SOUTH CENTRAL WASHOE COUNTY IN WESTERN NEVADA...
  THIS INCLUDES THE CITY OF RENO...

* UNTIL 545 PM PDT

* AT 454 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM NEW WASHOE CITY TO VIRGINIA
  CITY...AND MOVING NORTH NORTHWEST AT 20 MPH.

* LOCATIONS AFFECTED INCLUDE...DAYTON...LOCKWOOD...NEW WASHOE CITY...
  RENO...SPARKS AND VIRGINIA CITY.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE
INDOORS IMMEDIATELY! IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH
TO BE STRUCK BY LIGHTNING. STAY OFF LANDLINE TELEPHONES AND UNPLUG
ANY SENSITIVE ELECTRONICS.

THIS STORM IS CAPABLE OF PRODUCING LARGE HAIL...IN ADDITION TO
FREQUENT DEADLY LIGHTNING...HIGH WINDS...AND HEAVY RAIN. IF TIME
PERMITS...MOVE YOUR VEHICLE INTO A GARAGE...AND SEEK SHELTER INSIDE A
STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

THIS STORM IS CAPABLE OF PRODUCING LOCALLY HEAVY RAINFALL. WATCH FOR
PONDING WATER ON AREA ROADWAYS. DRIVERS SHOULD SLOW DOWN IF
ENCOUNTERING HEAVY RAINS...AND REMEMBER TO TURN ON THEIR HEADLIGHTS.

LAT...LON 3957 11995 3962 11956 3925 11950 3919 11983
TIME...MOT...LOC 2358Z 174DEG 16KT 3929 11979 3932 11965

$$

2 follow-up statements

437 
WWUS55 KREV 010015
SVSREV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RENO NV
515 PM PDT FRI SEP 30 2011

NVC019-029-031-510-010045-
/O.CON.KREV.SV.W.0008.000000T0000Z-111001T0045Z/
STOREY NV-WASHOE NV-CARSON CITY NV-LYON NV-
515 PM PDT FRI SEP 30 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM PDT
FOR EXTREME WEST CENTRAL LYON...NORTH CENTRAL CARSON CITY...SOUTH
CENTRAL WASHOE AND WESTERN STOREY COUNTIES...

AT 507 PM PDT...DOPPLER RADAR CONTINUED TO INDICATE A LINE OF SEVERE 
THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING 
WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE 
EXTENDING FROM WASHOE CITY TO NV 341 AT WASHOE-STOREY CO 
LINE...MOVING NORTH AT 25 MPH. ADDITIONALLY...A TRAINED SPOTTER IN 
WASHOE VALLEY REPORTED HEAVY RAIN AND THREE QUARTER INCH HAIL AT 510 
PM PDT.

* LOCATIONS AFFECTED INCLUDE...DAYTON...GOLD HILL...LAKEVIEW...
  LOCKWOOD...MUSTANG AND NEW WASHOE CITY.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE
INDOORS IMMEDIATELY! IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH
TO BE STRUCK BY LIGHTNING. STAY OFF LANDLINE TELEPHONES AND UNPLUG
ANY SENSITIVE ELECTRONICS.

THIS STORM IS CAPABLE OF PRODUCING LOCALLY HEAVY RAINFALL WITH AREAS 
OF PONDING WATER ON AREA ROADWAYS. DRIVERS SHOULD SLOW DOWN IF 
ENCOUNTERING HEAVY RAINS...AND REMEMBER TO TURN ON THEIR HEADLIGHTS. 
ADDITIONAL HEAVY RAINFALL MAY LEAD RESULT IN THE ISSUANCE OF AREAL 
FLOOD ADVISORIES AS WELL.

LAT...LON 3957 11995 3962 11956 3925 11950 3919 11983
TIME...MOT...LOC 0011Z 174DEG 22KT 3935 11980 3941 11966

$$

639 
WWUS55 KREV 010042
SVSREV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE RENO NV
542 PM PDT FRI SEP 30 2011

NVC019-029-031-510-010051-
/O.EXP.KREV.SV.W.0008.000000T0000Z-111001T0045Z/
STOREY NV-WASHOE NV-CARSON CITY NV-LYON NV-
542 PM PDT FRI SEP 30 2011

...THE SEVERE THUNDERSTORM WARNING FOR EXTREME WEST CENTRAL LYON...
NORTH CENTRAL CARSON CITY...SOUTH CENTRAL WASHOE AND WESTERN STOREY
COUNTIES WILL EXPIRE AT 545 PM PDT...

THE STORMS THAT EARLIER PROMPTED THE SEVERE THUNDERSTORM WARNING HAVE
WEAKENED AND MOVED OUT OF THE WARNED ARE...THEREFORE THE WARNING 
WILL BE ALLOWED TO EXPIRE. HOWEVER...STRONG THUNDERSTORMS WILL 
REMAIN IN THE AREA THROUGH 630 PM...CAPABLE OF PRODUCING GUSTY 
WINDS...DEADLY LIGHTNING...AND BRIEF MODERATE TO HEAVY RAINS.

LAT...LON 3957 11995 3962 11956 3925 11950 3919 11983
TIME...MOT...LOC 0041Z 174DEG 22KT 3953 11983 3959 11968

$$

The office that day

Everything else NWS Reno, NV issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 30, 5:22 PM PDT	Special Weather Statement	REV	Storey	53 min
Sep 30, 5:25 PM PDT	Areal Flood Advisory	REV	Storey, Washoe	46 min
Sep 30, 5:36 PM PDT	Special Weather Statement	REV	Storey	39 min
Sep 30, 5:42 PM PDT	Special Weather Statement	REV	Washoe	63 min
Sep 30, 6:06 PM PDT	Special Weather Statement	REV		24 min
Sep 30, 6:33 PM PDT	Special Weather Statement	REV	Washoe	42 min

Nearby

Severe Thunderstorm Warnings in Nevada, 2011 Every severe thunderstorm warning in 2011

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.