Alert archive / Oregon / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 10, NWS Boise, ID

July 20, 2001Baker County, Malheur County, Oregon

NWS Boise, ID issued this severe thunderstorm warning at Jul 20, 2001, 5:15 PM PDT for Baker County, Malheur County, Oregon. It was in force for 45 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 20, 2001, 5:15 PM PDT (00:15 UTC)
Expired
Jul 20, 2001, 6:00 PM PDT
In force
45 min
Issued by
NWS Boise, ID
Area
Whole counties

Counties Baker County, OR, Malheur County, OR

The nearest sounding before it

Spokane, WA (KOTX), launched 00:00Z, 0.3 hours before the alert went out and 428 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-pSkew-T log-p diagram, Spokane, WA at 00:00Z on 2001-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 257 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Spokane, WA at 00:00Z on 2001-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 2 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
257 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
2144 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
2 m²/s²
0-3 km storm-relative helicity
17 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 20, 1:25 PM PDT, 3 hours 50 minutes earlier.

Area forecast discussion, Jul 20, 1:25 PM PDT, 3 hours 50 minutes before
SOUTHWEST IDAHO/SOUTHEAST OREGON AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOISE IDAHO
225 PM MDT FRI JUL 20 2001

WELL DEFINED VORT CENTER NCENTRAL OREGON MOVING NEWD. THUNDER-
STORMS IN BOTH THE COMMA HEAD AND COMMA TAIL.  TAIL WILL COME
THROUGH WRN AND NRN CWA THIS EVENING.  NEXT VORT CENTER NEAR
43/131 WAS INSTEAD PROGGED INSIDE 130W AND WAS FORECAST TO TRACK
EWD INTO SRN IDAHO ZONES MIDDAY SATURDAY...EXITING NRN IDAHO
ZONES LATE SATURDAY.  BUT WITH THE ABOVE ERROR THE CENTER MAY
COME IN FURTHER SOUTH AND LATER THAN PROGGED...SO WILL HAVE A
SLIGHT CHANCE OF -TSRA ALL THE WAY EAST TO SRN TWIN FALLS COUNTY
SATURDAY.  ON SUNDAY ONLY NRN-MOST CWA STILL THREATENED WITH 20
PCT POPS...REST OF CWA LOOKS DRY.  SLIGHTLY COOLER SATURDAY THEN
SLIGHTLY WARMER AGAIN SUNDAY.

EXTENDED...NEW MRF DIFFERS GREATLY FROM YESTERDAY'S MRF.  SINCE
ECM SUPPORTED YESTERDAY'S MRF WILL STAY MOSTLY WITH THAT SOLUTION
AND MAKE ONLY SMALL CONCESSION TO TODAYS'S MRF.  THAT IS...
CONTINUED WARMING AND DRYING WITH ONLY A CHANCE OF -SHRA/-TSRA
LATE IN WEEK NEAR NV BORDER.  L COLIN

.BOI...NONE.

Nearby

Severe Thunderstorm Warnings in Oregon, 2001Every severe thunderstorm warning in 2001

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.