Alert archive / Idaho / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 25, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Jul 4, 1998, 5:47 PM PDT for Idaho County, Idaho. It was in force for 48 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 4, 1998, 5:47 PM PDT (00:47 UTC)
- Expired
- Jul 4, 1998, 6:35 PM PDT
- In force
- 48 min
- Issued by
- NWS Missoula, MT
- Area
- Whole counties
County Idaho County, ID
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 4, 5:55 PM PDT | Hail 1.25 | Grangeville, ID |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Spokane, WA (KOTX), launched 00:00Z, 0.8 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
- 528 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 1422 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 95 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 050052 RRA SVRMSO IDC049-050135- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 647 PM MDT (547 PM PDT) SAT JUL 4 1998 THE NATIONAL WEATHER SERVICE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WESTERN IDAHO COUNTY IN CENTRAL IDAHO * UNTIL 635 PM PDT (735 PM MDT) * AT 545 PM PDT...SEVERE THUNDERSTORM INDICATED NEAR GRANGEVILLE... BY SPOTTERS...MOVING NORTHEAST AT 20 MPH. * SEVERE THUNDERSTORM WILL BE NEAR... KOOSKIA AT 620 PM PDT THIS STORM HAS THE HISTORY OF PRODUCING 1.00 INCH HAIL. 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 4, 1:45 PM PDT, 4 hours 2 minutes earlier.
Area forecast discussion, Jul 4, 1:45 PM PDT, 4 hours 2 minutes before
WESTERN MONTANA AND NORTH CENTRAL IDAHO FORECAST DISCUSSION NATIONAL WEATHER SERVICE MISSOULA MT 245 PM MDT SAT JUL 4 1998 UPPER LEVEL TROF BEGINS TO WEAKEN AND KICK OUT...BUT MODELS DIFFER ON TIMING. BELIEVE NGM TOO FAST. TODAY MAY SEE SEVERE TSTMS LEMHI COUNTY AND IN SOUTHWEST MONTANA. SATELLITE SHOWING BLOW UPS AND LIGHTNING ALREADY IN THOSE AREAS. SHOULD BE ENOUGH INSTABILITY AND WITH HIGH DEWPOINTS WILL PROBABLY SEE LATE AFTN AND EVENING TSTMS OVER WESTERN MONTANA AND IDAHO...EXPECT SEVERE TSTMS EAST OF DIVIDE IN LOCATION OF THE THERMAL TROF ON SUNDAY...BUT NONE IN CWA. TSTM ACTIVITY DECREASES MONTANA AS UPPER FLOW BECOMES MORE WESTERLY BY MONDAY. HARMER ...FORECASTS BELOW ARE PRELIMINARY AND SUBJECT TO CHANGE... LIB .. 054/074 052/075 ... 323333 FCA EE 052/073 050/075 051 323333 POL .. 052/072 050/073 ... 323332 MSO EE 052/077 051/078 052 324432 HMM .. 053/078 051/081 ... 325432 BTM .. 048/074 046/076 ... 327432 S80 .. 053/074 051/077 ... 324332 P69 .. 056/077 055/079 ... 324332 SMN .. 052/072 048/074 ... 325432
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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.