Severe Thunderstorm Warning 9, NWS Boise, ID

Issued

May 30, 2003, 9:17 AM MDT (15:17 UTC)

Expired

May 30, 2003, 10:00 AM MDT

In force

43 min

Issued by

NWS Boise, ID

Area

Counties, with a storm outline in the text

Counties Ada County, ID, Elmore County, ID, Owyhee County, ID

The Boise radar (KCBX), 45 km from the middle of the area, began a volume at 15:20 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.

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

829 
WUUS55 KBOI 301517
SVRBOI
IDC001-039-073-301600-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BOISE ID
917 AM MDT FRI MAY 30 2003

THE NATIONAL WEATHER SERVICE IN BOISE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN ADA COUNTY IN SOUTHWEST IDAHO
  WEST CENTRAL ELMORE COUNTY IN SOUTHWEST IDAHO
  NORTH CENTRAL OWYHEE COUNTY IN SOUTHWEST IDAHO

* UNTIL 1000 AM MDT

* AT 915 AM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 15 MILES WEST OF GRAND VIEW...OR ABOUT 18 MILES
  EAST OF SILVER CITY...MOVING NORTHEAST AT 40 MPH.

* THE SEVERE THUNDERSTORM WILL REMAIN OVER RURAL AREAS OF...
  ADA...ELMORE AND OWYHEE COUNTIES

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.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN BOISE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 PM MDT FRIDAY
AFTERNOON FOR SOUTHWESTERN IDAHO.

LAT...LON 4293 11665 4275 11627 4330 11577 4353 11623

$$

NWS Boise, ID wrote its last area forecast discussion before this severe thunderstorm warning went out at May 30, 4:32 AM MDT, 4 hours 45 minutes earlier.

SOUTHWEST IDAHO/SOUTHEAST OREGON AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE IDAHO
435 AM MDT FRI MAY 30 2003

UPPER LEVEL S/WV TROUGH OVER NORTHERN CA AT 09Z IS LIFTING NORTHEAST
THROUGH CWFA TODAY AND INTO L/WV HIGH PRESSURE RIDGE AXIS OVER
ROCKIES. OVERNIGHT SYSTEM HAS BEEN SUPPLYING AMPLE MOISTURE AND
DYNAMICS TO AREA FOR SCATTERED SHOWERS AND THUNDERSTORMS MAINLY
SOUTHEAST ORE ZONES THROUGH ISOLATED SHOWERS HAVE OCCURRED OVER
EXTREME WESTERN ID AFTER MIDNIGHT. CWFA AIR MASS ALREADY QUITE
UNSTABLE AND AS S/WV MOVES OVER AREA TODAY THIS INSTABILITY WILL
INCREASE FOR WIDESPREAD CONVECTION NORTHERN ZONES THROUGH TONIGHT.
SPOTTY HEAVY SHOWERS WITH THIS CONVECTION AND GUSTY WINDS NORTHERN
ZONES TODAY WITH LIGHTER SHOWERS EXPECTED SOUTHERN ZONES WHERE
MOISTURE IS SOMEWHAT LESS. UNDER INCREASING CLOUDS MAX TEMPS TO COOL
AGAIN 5-10 DEGREES FROM THU LEVELS BUT STILL ABOVE NORMAL. AS S/WV
MOVES FURTHER NORTHEAST OF AREA SAT SOME RESIDUAL SHOWERS REMAIN
OVER NORTHERN MOUNTAINS. AIR MASS REMAINS SLIGHTLY UNSTABLE SAT
AFTERNOON FOR SLIGHT CHANCE OF THUNDERSTORMS AGAIN THOUGH INTENSITY
WILL NOT BE QUITE AS STRONG. SOME COOLING CONTINUES SAT AS S/WV
MOVES EAST WITH TEMPS SAT/SUN FINALLY LOWERING TO SLIGHTLY ABOVE
NORMAL FOR FIRST TIME IN ABOUT A WEEK.

EARLY NEXT WEEK STRONG UPPER LEVEL HIGH PRESSURE CENTER WHICH HAS
BEEN OVER 4-CORNERS AREA WITH HOT SOUTHERLY FLOW ALOFT OVER REGION
RETROGRADES WEST TO JUST OFFSHORE WEST COAST. FLOW ALOFT SLOWLY
SHIFTS TO NORTHWEST WITH UPPER RIDGE AXIS TO WEST. THIS ALLOWS TEMPS
TO REMAIN AROUND NORMAL DURING WEEK AND DRY CONDITIONS CONTINUING.

=
PARKER

IDZ011>016-028>030-ORZ061>064-311200-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BOISE IDAHO
530 AM MDT FRI MAY 30 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHWEST IDAHO AND SOUTHEAST
OREGON.

.DAY ONE...TODAY

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON
THROUGH THIS EVENING FROM BAKER COUNTY EASTWARD THROUGH VALLEY
COUNTY.  THE MAIN THREAT WITH THESE STORMS WILL BE GUSTY WINDS.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

Severe Thunderstorm Warnings in Idaho, 2003Every severe thunderstorm warning in 2003

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.