Alert archive / Idaho / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 10, NWS Missoula, MT

May 30, 2003Lemhi County, Idaho

NWS Missoula, MT issued this severe thunderstorm warning at May 30, 2003, 1:12 PM MDT for Lemhi County, Idaho. It was in force for 48 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: May 30, 2003, 1:12 PM MDT (19:12 UTC)
Expired: May 30, 2003, 2:00 PM MDT
In force: 48 min
Issued by: NWS Missoula, MT
Area: Counties, with a storm outline in the text

County Lemhi County, ID

Did it verify

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.

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 30, 12:35 PM MDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Boise Airport, ID (KBOI), launched 12:00Z, 7.2 hours before the alert went out and 260 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: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1493 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 80 m²/s²
0-3 km storm-relative helicity: 382 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.

000 
WUUS55 KMSO 301912
SVRMSO
IDC059-302000-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
110 PM MDT FRI MAY 30 2003

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN LEMHI COUNTY IN EAST CENTRAL IDAHO

* UNTIL 200 PM MDT

* AT 110 PM MDT...RADAR INDICATED A SEVERE THUNDERSTORM 21 MILES WEST
  OF SHOUP...OR 32 MILES WEST OF SALMON...MOVING NORTHEAST AT 40 MPH.

* THE SEVERE THUNDERSTORM WILL REMAIN OVER REMOTE AREAS.

DAMAGING WINDS IN EXCESS OF 55 MPH ARE LIKELY WITH THIS SEVERE 
THUNDERSTORM...ESPECIALLY DOWN THE SALMON RIVER VALLEY. HAIL IS 
POSSIBLE...ALONG WITH FREQUENT LIGHTNING AND HEAVY RAIN. FOR YOUR 
PROTECTION...GO INDOORS AND STAY AWAY FROM WINDOWS. IF YOU ARE 
CAUGHT OUTSIDE...MOVE TO A WELL PROTECTED AREA.


LAT...LON 4517 11456 4522 11463 4528 11460 4535 11467
          4555 11456 4545 11435 4558 11406 4564 11400
          4564 11391 4558 11381 4552 11383 4550 11378
          4546 11378 4522 11399

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Missoula, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at May 30, 9:43 AM MDT, 3 hours 29 minutes earlier.

Area forecast discussion, May 30, 9:43 AM MDT, 3 hours 29 minutes before

WESTERN MONTANA AND NORTH CENTRAL IDAHO FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MISSOULA MT
943 AM MDT FRI MAY 30 2003

.SHORT TERM...UPDATE TO ZONES COMING. NO UPDATE TO STATE. AN ACTIVE
WEATHER PATTERN EXPECTED TODAY FROM MISSOULA SOUTHWARD. IMPRESSIVE
SHORTWAVE TROUGH...CURRENTLY OVER NORTHEAST CALIFORNIA GENERATING
WIDESPREAD SHOWERS AND THUNDERSTORMS OVER EASTERN OR. THIS ACTIVITY
TO SPREAD INTO NORTH CENTRAL IDAHO AND WEST CENTRAL AND
SOUTHWEST MT TODAY. GOOD SHEAR AND INSTABILITY IN THE ATMOSPHERE
GIVES THE POTENTIAL FOR STRONG THUNDERSTORMS OVER NORTH CENTRAL IDAHO
ZONES AND THE BITTERROOT SAPPHIRE AREAS THIS AFTERNOON. INITIAL
POTENTIAL FOR STRONG GUSTY WINDS WILL BE REPLACED BY LOCALLY HEAVY
RAIN...AS THE ATMOSPHERE IS DRY THIS MORNING...BUT WILL MOISTEN UP
IN THE LATE AFTERNOON INTO THIS EVENING HOURS. WIDESPREAD
PRECIPITATION IS EXPECTED TONIGHT...AS THIS WEATHER SYSTEM MOVES
ACROSS OUR AREA.

HYDRO ISSUES...STATUS QUO FOR NOW WITH FLOODING ALONG THE
BITTERROOT RIVER...BUT LOCALLY HEAVY RAIN MAY CAUSE SMALL STREAMS IN
NORTH CENTRAL IDAHO AND THE BITTERROOT RANGE TO OVER TOP THEIR BANKS
NEAR STRONG THUNDERSTORMS. WILL MONITOR STREAMS CAREFULLY. FELSCH

.LONG TERM...A RATHER DRY WESTERLY FLOW SHOULD DOMINATE MONDAY WITH
RIDGING DEVELOPING ALONG THE WEST COAST THROUGH MID NEXT WEEK.  WEAK
UPPER LEVEL DISTURBANCES OCCASIONALLY WILL BRUSH THE REGION...
ESPECIALLY MONDAY...BUT ONLY LOW PRECIPITATION THREATS
EXPECTED IN THE NORTH. TEMPERATURES LOOK TO RETURN TO MORE SEASONABLE
HIGHS WITH FAIRLY COOL NIGHTS. MEAD

.MSO...FLOOD WARNING FOR THE BITTERROOT RIVER IN MONTANA.
       FLOOD WATCH FOR CLEARWATER...SELWAY AND LITTLE SALMON RIVERS
         IN IDAHO.

...7-DAY SPOT TEMPS AND POPS...
LIB BEB /081 056/069 049/074 2716421
     BBBB 048/072 041/072 042/072 042/074 046/ 27111111110
FCA BEB /078 051/066 042/072 2726521
     BBBB 044/069 038/069 039/069 039/071 043/ 27111111110
POL BEB /081 054/068 044/075 2727521
     BBBB 047/071 041/071 042/071 042/073 045/ 27111111110
MSO EEB /079 055/069 045/076 2757511
     BBBB 048/073 042/073 043/073 043/075 046/ 27111111110
HMM WEB /076 054/071 043/076 2777411
     BBBB 048/073 042/073 043/073 043/075 045/ 27111111110
BTM EEB /078 050/067 039/075 2754510
     BBBB 045/071 037/071 038/071 038/073 038/ 27011111110
ORO WBB /079 055/081 053/079 2756211
     BUUU 053/077 046/077 047/077 047/079 053/ 27111000000
GRV WBB /075 053/075 046/074 2766211
     BUUU 048/072 042/072 043/072 043/074 046/ 27111000000
SMN WEB /081 051/075 044/077 2765300
     BBBB 047/074 042/074 043/074 043/076 043/ 27011111110

Hazardous weather outlook, May 30, 6:00 AM MDT, 7 hours 12 minutes before

MTZ001>007-043-IDZ005>010-311200-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MISSOULA MT
600 AM MDT FRI MAY 30 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MONTANA AND NORTH
CENTRAL IDAHO

.DAY ONE... TODAY

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON
AND EVENING FROM MISSOULA TO GRANGEVILLE AND AREAS TO THE SOUTH.
STORMS THAT DEVELOP THIS AFTERNOON HAVE THE POTENTIAL TO PRODUCE
STRONG GUSTY WINDS IN EXCESS OF 55 MPH...AND WILL LINGER INTO THIS
EVENING.

STORMS THAT CONTINUE INTO THE EVENING WILL LIKELY HAVE PERIODS OF
HEAVY RAIN. IF THE STORMS DEVELOP OVER ALREADY SWOLLEN RIVERS AND
STREAMS...THIS MAY RESULT IN ADDITIONAL AND FLASH RISES.

PERSONS LIVING ALONG RIVERS AND STREAMS SHOULD MONITOR LEVELS AND
TAKE APPROPRIATE ACTION IF THEY BEGIN TO RISE.

A FLOOD WARNING CONTINUES FOR THE BITTERROOT RIVER IN WESTERN
MONTANA THROUGH THE WEEKEND...AS WELL AS A FLOOD WATCH FOR THE
CLEARWATER...SELWAY AND LITTLE SALMON RIVERS IN NORTH CENTRAL IDAHO
TODAY AND SATURDAY. FOR MORE INFORMATION ON THESE RIVERS IN WESTERN
MONTANA AND NORTH CENTRAL IDAHO CHECK THE LATEST RIVER STATEMENT FOR
DETAILS...OR GTFRVSMSO.

.DAYS TWO THROUGH
 SEVEN... SATURDAY THROUGH FRIDAY

MORE THUNDERSTORMS ON SATURDAY WILL BRING ADDED SHOWERS AND
THUNDERSTORMS...MAINLY OVER MONTANA. A SURFACE COLD FRONT MOVING
THROUGH THE REGION WILL ALSO BRING GUSTY AFTERNOON WINDS TO WESTERN
MONTANA.

SUNDAY THROUGH FRIDAY IS EXPECTED TO BE QUIET. JUST SOME ISOLATED
SHOWERS POSSIBLE NORTH SUNDAY AND MONDAY. TEMPERATURES WILL REMAIN
NEAR SEASONAL THROUGH THIS PERIOD.

.SPOTTER INFORMATION STATEMENT...

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

The office that day

Everything else NWS Missoula, MT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 30, 5:20 PM MDT	Severe Thunderstorm Warning	MSO	Lemhi	40 min

Nearby

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