Alert archive / Idaho / Flash Flood Warnings in 2018
Flash Flood Warning 1, NWS Missoula, MT
NWS Missoula, MT issued this flash flood warning at May 25, 2018, 9:25 PM PDT for Clearwater County, Idaho County, Idaho. It was in force for 3 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 25, 2018, 9:25 PM PDT (04:25 UTC)
- Expired
- May 26, 2018, 12:30 AM PDT
- In force
- 3 hr
- Issued by
- NWS Missoula, MT
- Area
- Storm-based polygon
- Flood severity
- None
Counties Clearwater County, ID, Idaho County, ID
The radar
The Missoula radar (KMSX), 174 km from the middle of the area, began a volume at 04:28 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 |
|---|---|---|---|
| May 25, 9:25 PM PDT | HEAVY RAIN 0.74 | 2 N East Kamiah, ID | 0.74 INCHES BETWEEN 8:45-9:25PM PDT. RECEIVED 0.24 INCHES IN THE FIRST 15 MINUTES 8:45-9PM PDT. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Spokane, WA (KOTX), launched 00:00Z, 4.4 hours before the alert went out and 158 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
- 7 J/kg
- Mixed-layer CIN
- -63 J/kg
- Mixed-layer LCL
- 2116 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 90 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
285
WGUS55 KMSO 260425
FFWMSO
IDC035-049-260730-
/O.NEW.KMSO.FF.W.0001.180526T0425Z-180526T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Missoula MT
925 PM PDT FRI MAY 25 2018
The National Weather Service in Missoula has issued a
* Flash Flood Warning for...
North central Idaho County in central Idaho...
Southwestern Clearwater County in the Panhandle of Idaho...
* Until 1230 AM PDT
* At 922 PM PDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Flash flooding is expected to
begin shortly.
* Some locations that will experience flooding include...
Weippe, East Kamiah, Glenwood, Musselshell, Pardee and Woodland.
LAT...LON 4648 11606 4644 11547 4611 11587 4621 11604
4623 11601 4626 11605 4626 11607 4627 11609
4629 11612 4632 11614
$$1 follow-up statement
570
WGUS75 KMSO 260721
FFSMSO
Flash Flood Statement
National Weather Service Missoula MT
1221 AM PDT SAT MAY 26 2018
IDC035-049-260731-
/O.EXP.KMSO.FF.W.0001.000000T0000Z-180526T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Idaho ID-Clearwater ID-
1221 AM PDT SAT MAY 26 2018
...THE FLASH FLOOD WARNING FOR NORTH CENTRAL IDAHO AND SOUTHWESTERN
CLEARWATER COUNTIES WILL EXPIRE AT 1230 AM PDT...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.
LAT...LON 4648 11606 4644 11547 4611 11587 4621 11604
4623 11601 4626 11605 4626 11607 4627 11609
4629 11612 4632 11614
$$The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 25, 7:21 PM PDT | Special Weather Statement | MSO | Lewis | 24 min |
| May 25, 7:59 PM PDT | Special Weather Statement | MSO | Idaho | 46 min |
| May 25, 8:39 PM PDT | Special Weather Statement | MSO | Lewis | 21 min |
| May 25, 8:50 PM PDT | Special Weather Statement | MSO | Lewis | 40 min |
| May 25, 9:30 PM PDT | Special Weather Statement | MSO | Clearwater | 30 min |
| May 25, 10:20 PM PDT | Special Weather Statement | MSO | Clearwater | 40 min |
| May 26, 12:18 PM PDT | Special Weather Statement | MSO | Lemhi | 42 min |
| May 26, 1:31 PM PDT | Special Weather Statement | MSO | Lemhi | 44 min |
| May 26, 2:09 PM PDT | Severe Thunderstorm Warning | MSO | Lemhi | 36 min |
Nearby
Flash Flood Warnings in Idaho, 2018Every flash flood warning in 2018
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.