Alert archive / Idaho / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 42, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Jul 30, 1998, 4:35 PM MDT for Lemhi County, Idaho. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 30, 1998, 4:35 PM MDT (22:35 UTC)
- Expired
- Jul 30, 1998, 5:15 PM MDT
- In force
- 40 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties
County Lemhi County, ID
The radar
The Pocatello radar (KSFX), 227 km from the middle of the area, began a volume at 22:37 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.
The nearest sounding before it
Boise Airport, ID (KBOI), launched 12:00Z, 10.6 hours before the alert went out and 236 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
- 5 J/kg
- Mixed-layer CIN
- -408 J/kg
- Mixed-layer LCL
- 2078 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- -14 m²/s²
- 0-3 km storm-relative helicity
- 57 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMSO 302237 RRA SVRMSO IDC059-302315- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 435 PM MDT (335 PM PDT) THU JUL 30 1998 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WESTERN LEMHI COUNTY IN EAST CENTRAL IDAHO * UNTIL 515 PM MDT * AT 435 PM MDT...SEVERE THUNDERSTORM INDICATED 8 MILES SOUTH OF SALMON...BY NATIONAL WEATHER SERVICE DOPPLER RADAR...MOVING NORTH AT 15 MPH. * SEVERE THUNDERSTORM WILL BE NEAR... SALMON AT 445 PM MDT DESTRUCTIVE HAIL...DAMAGING WINDS...DEADLY LIGHTNING...AND VERY HEAVY RAIN ARE ALL LIKELY WITH THIS STORM. FOR YOUR PROTECTION... MOVE INSIDE A STRONG BUILDING...AND STAY A0WAY FROM WINDOWS. DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. FOSS/BELTZ
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 Jul 30, 2:30 PM MDT, 2 hours 5 minutes earlier.
Area forecast discussion, Jul 30, 2:30 PM MDT, 2 hours 5 minutes before
WESTERN MONTANA AND NORTH CENTRAL IDAHO FORECAST DISCUSSION NATIONAL WEATHER SERVICE MISSOULA MT 230 PM MDT THU JUL 30 1998 WILL FOLLOW ETA MODEL SINCE IT INITIALIZED WELL AND JET SOUTH SIDE OF TROUGH BUT LITTLE DIFFERENCE SINCE ALL SHOW TROUGH MOVING INLAND NEXT 48 HOURS. FIRST SHORTWAVE OVER IDA LIFTING NORTH AND BRINGING BAND OF CONVECTION FROM EASTERN WA TO NORTHWEST WY. THIS WILL BE MAIN CONCERN THIS EVENING ACROSS FORECAST AREA. UPPER LOW ACROSS NORTHERN CALIF HAS SHORTWAVE UNDERCUTTING INTO WESTERN NV. THIS IS SPARKING STRONG CELLS INTO SOUTHEAST ORE...MODELS TEND TO BRING THIS PRECIP ACROSS CWA LATE TONIGHT INTO EARLY FRIDAY SO WILL LEAVE THUNDERSTORM THREAT OVERNIGHT. NGM FORECAST -6 LIFTED INDEX AT 6 AM FRIDAY AS SYSTEM MOVES INTO WESTERN MT. TROUGH MOVES OVER WESTERN MT FRIDAY FOR DAY OF SCATTERED SHOWERS AND T-STORMS...THEN LINGERS INTO EARLY SATURDAY. OUTSIDE CHANCE OF TROPICAL MOISTURE INJECTING TROUGH FRIDAY...WHEN MODELS HAVE HIGHER QPF AMOUNTS. MOS TEMPS ONLY IN UPPER 70S FOR HIGHS MANY LOCATIONS ON SATURDAY...NOT BAD FOR AUGUST 1ST. SLOW MOVING CONVECTION STILL A THREAT FOR FLASH FLOODING IN IDAHO BUT BELIEVE MAIN PRECIP COMING FRIDAY FROM ACTIVE TROUGH. LOWERING TEMPS AND RAISING POPS. BOLDT ...FORECASTS BELOW ARE PRELIMINARY AND SUBJECT TO CHANGE... LIB .. 060/085 059/082 ... 285542 FCA TB 056/081 055/078 053 285553 POL .. 059/082 057/080 ... 285553 MSO TB 059/082 057/080 054 285553 HMM .. 060@/084 058/082 ... 285553 BTM .. 055/080 053/078 ... 286553 S80 .. 061/085 056/084 ... 285532 P69 .. 062/089 060/088 ... 285532 SMN .. 055/088 053/087 ... 285431
Nearby
Severe Thunderstorm Warnings in Idaho, 1998Every severe thunderstorm warning in 1998
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.