Alert archive / Idaho / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 15, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Jul 2, 1998, 6:40 PM PDT for Idaho County, Idaho. It was in force for 50 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 2, 1998, 6:40 PM PDT (01:40 UTC)
- Expired
- Jul 2, 1998, 7:30 PM PDT
- In force
- 50 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties
County Idaho County, ID
The nearest sounding before it
Spokane, WA (KOTX), launched 00:00Z, 1.7 hours before the alert went out and 218 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
- 255 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 2431 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 60 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMSO 030145 RRA SVRMSO IDC049-030230- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 740 PM MDT (640 PM PDT) THU JUL 2 1998 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL IDAHO COUNTY IN CENTRAL IDAHO * UNTIL 730 PM PDT (830 PM MDT) * AT 635 PM PDT...SEVERE THUNDERSTORM INDICATED 14 MILES SOUTHWEST OF ELK CITY...BY NATIONAL WEATHER SERVICE DOPPLER RADAR...MOVING NORTHEAST AT 15 MPH. * SEVERE THUNDERSTORM WILL BE NEAR... ELK CITY AT 715 PM PDT SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH... DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
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 2, 1:45 PM PDT, 4 hours 55 minutes earlier.
Area forecast discussion, Jul 2, 1:45 PM PDT, 4 hours 55 minutes before
WESTERN MONTANA AND NORTH CENTRAL IDAHO FORECAST DISCUSSION NATIONAL WEATHER SERVICE MISSOULA MT 245 PM MDT THU JUL 2 1998 SATELLITE WATER VAPOR LOOP INDICATING VORT MAX OFF THE SOUTHEAST COAST OF OREGON ATTM. NGM AND ETA FURTHER NORTH WITH THIS FEATURE. AGREE WITH PMDHMD AND BOI THAT ETA TOO STRONG WITH VORT MAX OVER NORTHERN IDAHO 24-36 HOURS AND PREFER NGM/AVN SOLUTIONS. MOISTURE CONVERGENCE INCREASES OVER THE CWA THIS EVENING WITH FOCUSING MECHANISM OF A 300/700MB COUPLET REMAINING OVER EASTERN OREGON AND CENTRAL IDAHO OVERNIGHT. THUS CENTRAL IDAHO MAY SEE TSTMS TONIGHT. COUPLET AND MOISTURE CONVERGENCE ASSOCIATED WITH A VORT MAX OVER CENTRAL IDAHO AROUND NOON FRIDAY SLIDES NORTHEAST INTO NORTHERN IDAHO AND NORTHWEST MONTANA IN THE AFTERNOON. THUS LIKELY POPS LOOK GOOD OVER MT ZONES 1-4. THERMAL TROF SHIFTS INTO CENTRAL MONTANA SATURDAY...BUT SHOULD BE ENOUGH MOISTURE AND INSTABILITY FOR AFTN SCATTERED TSTMS. HARMER ...FORECASTS BELOW ARE PRELIMINARY AND SUBJECT TO CHANGE... LIB .. 057/080 059/075 ... 324764 FCA WE 059/077 059/073 055 324764 POL .. 060/077 062/072 ... 323653 MSO WE 056/083 058/078 054 323643 HMM .. 059/085 061/080 ... 323533 BTM .. 050/080 052/075 ... 323433 S80 .. 056/082 058/078 ... 325433 P69 .. 058/080 061/075 ... 325533 SMN .. 052/080 054/075 ... 323533
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 2, 6:24 PM PDT | Severe Thunderstorm Warning | MSO | Idaho | 46 min |
| Jul 3, 12:36 PM PDT | Severe Thunderstorm Warning | MSO | Idaho | 49 min |
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.