Alert archive / Idaho / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 25, NWS Boise, ID
NWS Boise, ID issued this severe thunderstorm warning at Jul 25, 2002, 4:40 PM MDT for Payette County, Washington County, Idaho; Malheur County, Oregon. It was in force for 50 min. 2 reports 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 25, 2002, 4:40 PM MDT (22:40 UTC)
- Expired
- Jul 25, 2002, 5:30 PM MDT
- In force
- 50 min
- Issued by
- NWS Boise, ID
- Area
- Whole counties
Counties Payette County, ID, Washington County, ID, Malheur County, OR
The radar
The Boise radar (KCBX), 79 km from the middle of the area, began a volume at 22:39 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 25, 4:45 PM MDT | Thunderstorm Wind 50 E | Payette, ID | |
| Jul 25, 4:50 PM MDT | Thunderstorm Wind 60 M | Weiser, 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
Boise Airport, ID (KBOI), launched 12:00Z, 10.7 hours before the alert went out and 77 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3606 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 23 m²/s²
- 0-3 km storm-relative helicity
- 63 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Boise, ID wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 25, 9:05 AM MDT, 7 hours 35 minutes earlier.
Area forecast discussion, Jul 25, 9:05 AM MDT, 7 hours 35 minutes before
SOUTHWEST IDAHO/SOUTHEAST OREGON AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BOISE IDAHO 905 AM MDT THU JUL 25 2002 NO UPDATES. MORNING THUNDERSTORMS OVER THE SOUTHWEST HIGHLANDS, MAGIC VALLEY AND CAMAS PRAIRIE WILL DECREASE THROUGHOUT THE DAY TODAY THEN REGENERATE THIS EVENING. THUNDERSTORMS OVER THE BAKER CO AND WEST CENTRAL MOUNTAINS WILL CONTINUE TODAY AS AN UPPER LEVEL TROUGH SWINGS THROUGH THE CWFA THEN DECREASE THIS EVENING BEHIND THE TROUGH. BOISE SOUNDING THIS MORNING IS DRIER THAN YESTERDAY AT 0.60 PRECIP WATER...LI -3 WITH A CONVECTIVE TEMP OF 98 F ON A FORECAST HIGH OF 94 F. CAPE OF 550 J/KG AND SHEAR 40 KTS FOR ISOLATED PULSE STORMS. D.HUSTON .BOI...FIRE WEATHER WATCH FAR SOUTHEAST OREGON AND SOUTHWEST IDAHO FOR DRY LIGHTNING AND LOW RH THURSDAY. SEE RFWBOI/WWUS85 KBOI FOR DETAILS. AREA MAY NEED TO BE RE-ASSESSED FOR THE POTENTIAL OF SIG RAIN WITH SOME OF THESE STORMS. NOT ALL DRY
The office that day
Everything else NWS Boise, ID issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 5:00 PM MDT | Severe Thunderstorm Warning | BOI | Ada, Boise, Canyon, Gem | 45 min |
| Jul 25, 5:26 PM MDT | Flash Flood Warning | BOI | Washington | 2 hr |
Nearby
Severe Thunderstorm Warnings in Idaho, 2002Severe Thunderstorm Warnings in Oregon, 2002Every severe thunderstorm warning in 2002
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; radar from the NEXRAD Level II archive.